318results about How to "Guaranteed normal transportation" patented technology

The invention relates to a plastic packaging (1) made from a packaging dish (2) and a cover lid (3). The cover lid (3) is at least partially sealed to the packaging dish (2) in a peelable manner and the cover lid (3), or the packaging dish (2), comprises at least one knob (5) and complementary to the above the packaging dish (2) or the cover lid (3) comprises a recess (6), through which the knob(s) is / are pressed on sealing the plastic packaging (1). At least a partial region of at least one knob is provided with a sealing material (95) or preferably at least one partial region of at least one knob (5) and the boundary region of the complementary recess (7) is connected to a sealing material (9), which on first opening of the packaging (1) is damaged. The invention further relates to methods for the production of said packages.

The invention discloses a preparation method of gradient porous bioceramic scaffold. The method adopts the steps of preparing three-dimensional shells, pouring bioceramic slurry, freeze-drying and sintering to prepare porous bioceramic scaffold with relatively dense structure in the exterior and directional layered porous structure in the interior. The average flexural strength of the shell material reaches 28.5-35.6MPa; in addition, the porous bioceramic scaffold prepared by the method of the invention can be customized according to the individual differences of patients without relying on moulds for shaping and the invention is characterized by fast production; and the gradient porous bioceramic scaffold can be used in the field that artificial bone is used to repair pathological or injured bone tissues.

The invention discloses a long distance ice temperature live keeping transport case which comprises a control region and a storage region, wherein a control system is arranged in the control region; the storage region is used for positioning a fish box; a plurality of multifunction sensors are evenly arranged on the top and four walls of the storage region at interval; a temperature sensor, a humidity sensor, an oxygen sensor and a carbon dioxide sensor are arranged on each multifunction sensor, and each multifunction sensor is connected with the control system through the sensor module; a temperature controller, a draught fan, a humidifier, an oxygen generator, a GPS module, a communication module, a water pump and a warning device are arranged in the control region. The long distance ice temperature live keeping transport case can effectively improve freshness retaining quality of the long-distance transport aquatic product, improve transport amount and reduce the transport cost, the fresh and alive aquatic product can be transported and stored under ice temperature live keeping condition and the transparency, technicalization and integration of cold chain management can be promoted.

The present invention relates to a cantilever calculation and installation method of electrified contact line of high-speed railway, which comprises calculating the length of the flat cantilever, the length of the inclined cantilever pipe, the position of the positioning ring on the inclined cantilever and the cantilevers, preparing the cantilevers, and installing the cantilevers. The method belongs to the electromechanical field of rail traffic, in particular to the construction method of installing the flat cantilever and the inclined cantilever on the contact line of the high-speed railway. The method solves the problem that a large amount of line time is consumed in the construction because of the complex positioning of the flat cantilever and the inclined cantilever in the installation process. The construction method has high efficiency, makes full use of the time of non-closed points, accurately calculates and prepares the cantilevers, reduces a large amount of on-site adjusting time and railway holding time, and greatly improves the economic benefits.

The invention discloses a crystalline silicon solar cell front silver paste and a preparation method thereof. The front silver paste comprises the following components in percentage by weight: 85-90%of silver powder, 5-10% of an organic carrier, 5-10% of an organic carrier, 1.5-5% of composite glass powder, and 0.05-1% of a silver paste additive. The silver powder in different particle size distribution is cooperatively used, the slurry is good in ink permeability, and the silver powder particles in the grid line are more uniformly and tightly filled, so that the sintering density of the gridline is facilitated, the resistance of the grid lines is reduced, and the photoelectric conversion efficiency is improved. The preparation process of the glass powder is simple, the control is facilitated; the glass powder with different components is compounded and used, so that a series of particles are uniform, the softening temperature is low, and the composite glass powder has good wettability to the silver powder and the silicon substrate, a front silver paste prepared from the composite glass powder is sintered on the front surface of the cell, the silver electrode and the silicon havegood ohmic contact and welding performance, and the adhesion strength of the electrode is high.

The invention discloses bioactive glass-modified gelatin composite hydrogel as well as a preparation method thereof, and belongs to the field of biomedical materials. The bioactive glass-modified gelatin composite hydrogel is prepared by the following steps: the bioactive glass powder is added into a solution of modified gelatin containing a photoinitiator, ultrasonic treatment and stirring are carried out, uniformly dispersed materials are poured into a die, and after UV-irradiation is carried out for a period of time, the bioactive glass-modified gelatin composite hydrogel is obtained. The bioactive glass-modified gelatin composite hydrogel has good biological activity, osteoinductivity and high water content (which is 80% or above), and the product is used for the fields of non-bearing bone defect repair, slow release of medicament, bone tissue engineering, and the like.

The invention discloses an electrical safety equipment transport vehicle capable of surmounting obstacles. The electrical safety equipment transport vehicle capable of surmounting the obstacles comprises a vehicle body, the vehicle body comprises a base plate, baffles arranged on the two sides of the base plate, a push-and-pull rod arranged at the front end of the base plate and traveling wheels which are installed below the base plate through axles; surmounting wheels are arranged on the outer sides of the vehicle body, each surmounting wheel and the corresponding traveling wheel are coaxially arranged, and the size of the wheel diameter of each surmounting wheel can be changed; each surmounting wheel comprises multiple arc-shaped support plates which are distributed in the peripheral direction, and the two adjacent support plates are connected through a caterpillar band; the support plates are connected to an axle ring which is installed on the corresponding axle in a sleeving mode through telescopic installation shafts; when the surmounting wheels are spread, the installation shafts stretch, and the wheel diameter of each surmounting wheel is larger than that of the corresponding traveling wheel after spreading; when the surmounting wheels are contracted, the installation shafts shorten, and the wheel diameter of each surmounting wheel is smaller than that of the corresponding traveling wheel after contraction. The electrical safety equipment transport vehicle capable of surmounting the obstacles can safely and effectively transports electrical equipment, and under the situation of poor road conditions of mountainous regions and the like, good use property is achieved.

A tissue-engineered bionic bone scaffold with high biocompatibility, bioactivity, degradability and osteoplastic induction has a three-layer structure composed of external degradable compact biofilm layer, central porous layer with less pore diameter for high mechanical strength, and internal porous layer with big pore diameter for transferring nutrients. Said central and internal layers are a composition consisting of in-situ formed nano-phase Ca-P salt and degradable biologic material.

The present invention discloses an anti-collision early warning system for a vehicle and a vehicle comprising the anti-collision early warning system. The anti-collision early warning system includesan alarm host, a laser radar device, an ultrasonic radar device and an alarm device; the warning host includes a positioning device, a database communication device, and a first communication module;the database communication device is used for obtaining height-limiting obstacle positioning information in a database; the positioning device is used for obtaining the positioning information of thevehicle in real time, and determining a distance between a height-limiting obstacle ahead nearest to the vehicle and the vehicle through comparison, and the first communication module instructs the alarm device to send out first-level early warning signals when the distance is too small; the laser radar device is used for detecting the distance of the height-limiting obstacle and instructing the alarm device to send out second-level early warning signals when the distance is too small; and the ultrasonic radar device is used for detecting the distance of the height-limiting obstacle and instructing the alarm device to send out third-level early warning signals when the distance is too small. With the system of the invention adopted, a user can be effectively warned against an obstacle found in a transportation road, and the safety and reliability of goods transportation can be fully guaranteed.

The invention discloses a tunnel portal dangerous rock falling multi-stage protection method and a structure body thereof. The tunnel portal dangerous rock falling multi-stage protection method concretely comprises the following steps: step I, when rockfall impact energy is small, a high-strength rigid ceiling guides falling rocks to the two sides of a traffic line; step II, when the rockfall impact energy is medium, the high-strength rigid ceiling transfers the impact energy to a shock absorption and energy dissipation device and guides the falling rocks to the two sides of the traffic line at the same time; and step III, when the rockfall impact energy is large, the high-strength rigid ceiling carries out light plastic deformation and transfers the energy to the shock absorption and energy dissipation device at the same time, and the shock absorption and energy dissipation device carries out compressive deformation to realize the protection action. The structure body of the tunnel portal dangerous rock falling multi-stage protection method comprises the high-strength rigid ceiling, the shock absorption and energy dissipation device, a supporting structure and a permanent anchoring base. The tunnel portal dangerous rock falling multi-stage protection method and the structure body thereof realize multi-stage protection in a mode with the synergistic effect of avoidance, energy dissipation and guide and have the characteristics of obvious flexibility, applicability, economy and environmental protection property.

The invention discloses a fruit conveyor. The fruit conveyor comprises a feed hopper and a discharge hopper. One end of the feed hopper is provided with a discharge port. The outer sidewall of a feed chute on the discharge port is provided with a slide rail. The slide rail is connected with a material baffle used for closing the discharge port in a sliding mode. The slide rail is connected with the material baffle in a clamped mode. The side, far from the feed hopper, of the material baffle is provided with a gear. A pressure lever used for pressing the material baffle to move is arranged on the gear. The discharge hopper is arranged below the material baffle. A first spring is connected between the sidewall of the discharge hopper and the material baffle. Vibration damping plates are hinged to the wall of the discharge hopper. Second springs are connected between the vibration damping plates and the sidewall of the discharge hopper. An arch elimination rotary disk is arranged below the vibration damping plates. The fruit conveyor can improve the working efficiency and convey fruits quantitatively.

The invention belongs to the field of water saving and fertilizing, and particularly relates to a mountain tea garden water-saving and fertilizing device and a fertilizing method applying the same. The mountain tea garden water-saving and fertilizing device comprises a fertilizing pipe; the top of a fertilizing pipe cylinder is covered with a sponge lid, the bottom of the fertilizing pipe cylinder is provided with a water storage hopper, and the hopper opening of the water storage hopper covers a mesh part; nutrient holes are arranged in the pipe body of the fertilizing pipe in a penetrating mode. The mountain tea garden water-saving and fertilizing device has the advantages of being concise in configuration, convenient to use, and high in fertilizer utilization rate, and can obviously lower the cost of a farmer in planting tea and reduce environment pollution. The other technical purpose is to provide the fertilizing method based on the device so as to further promote forming of good quality of the tea. The method comprises the steps of embedding the devices in dripping lines of all rows of tea trees, and manufacturing a mixed fertilizer to put the fertilizer into the pipe cavity of the fertilizing pipe. Along with mutual mixing of water liquor in the fertilizing pipe and the mixed fertilizer, the mixed fertilizer is infiltrated out into soil around the fertilizing pipe along the nutrient holes through the water liquor, and thus the water saving and fertilizing operation is achieved.

The invention discloses a marine heavy fuel oil purifying and heating system. The marine heavy fuel oil purifying and heating system comprises a heavy fuel oil hot-oil circulating and heating system and a heavy fuel oil purifying system connected with the heavy fuel oil hot-oil circulating and heating system through a pipeline; conduction oil circulates in the heavy fuel oil hot-oil circulating and heating system, and the heavy fuel oil hot-oil circulating and heating system comprises a boiler, a heavy fuel oil sediment tank, a heavy fuel oil daily tank, an oil-gas separator and a hot oil circulating pump, wherein a loop is formed by the boiler, the heavy fuel oil sediment tank, the heavy fuel oil daily tank, the oil-gas separator and the hot oil circulating pump; the heavy fuel oil purifying system comprises an oil separator heater and an oil separator, the oil separator heater is connected with the heavy fuel oil sediment tank through a pipeline, the input end of the oil separator is connected with the oil separator heater, and the output end of the oil separator is connected to the heavy fuel oil daily tank through a pipeline. Heavy fuel oil is heated to improve flowability and ensure transportation of the heavy fuel oil, and the heavy fuel oil is purified, so that working efficiency of a diesel engine set is improved, and service life of the diesel engine set is prolonged.

The invention discloses a two-leg shield-type sublevel caving hydraulic support, which comprises an open-crotch type pedestal and two hydraulic extension legs equipped on the open-crotch type pedestal, wherein the top ends of the two hydraulic extension legs are respectively hinged with a top beam; the back part of the top beam is hinged with the upper part of a shield beam; the lower part of the shield beam is hinged with the open-crotch type pedestal via a four-bar linkage mechanism; a balancing lifting jack is equipped between the back part of the top beam and the shield beam; a tail beam with box type construction is disposed at the lower end of the shield beam, a tail beam lifting jack is equipped between the lower part of the tail beam and the lower part of the shied beam; and a slide track, an inserting plate equipped in the slide track and a inserting plate lifting jack for driving the inserting plate to carry out reciprocating movement along the slide track are equipped in the box of the tail beam. The invention integrates shield-type support and sublevel caving technique, and adopts two-leg caving support, so that the structure is simple and compact, and the center distance between the front and back slides is effectively decreased. The invention is also helpful for the ascending, movement and descending operation of the support.

The invention relates to a folding conveyor belt. The folding conveyor belt comprises rollers, side wheels, ejecting pillars, columns, universal wheels, folding arms, fixed shafts, telescopic rods, side shafts, bolts, cross shafts and cross shaft holes. The universal wheels are arranged at the bottoms of the columns, the telescopic rods are mounted in the middle positions of the columns, the topsof the columns are separately connected to the upper and lower cross shafts, the rollers are mounted on the cross shafts in a sleeving mode, ejecting pillars are separately mounted on two sides of therollers, the side shafts are arranged on the tops of the ejecting pillars, the side shafts and the side wheels are in interference fitting connection, the cross shaft holes are formed in the two endsand the middle positions of the folding arms, two ends of the cross shafts penetrate the cross shaft holes, separately, the folding arms are separately mounted on the outer sides of the ejecting pillars, and the folding arms are connected to the upper and lower cross shafts in a staggered mode. The folding conveyor belt designed by the invention is convenient to operate, convenient to fold and store and high in practicality.

The invention discloses a four-leg shield-type sublevel caving hydraulic support, which comprises four supporting hydraulic extension legs equipped on a pedestal. The top ends of the four supporting hydraulic extension legs are respectively hinged with a top beam; a forward extension beam is hinged at the front end of the top beam; a sprag is hinged at the front end of the forward extension beam, a sprag lifting jack is equipped on the forward extension beam, an ejector rod of the sprag lifting jack is hinged with the back part of the sprag; the back part of the top beam is hinged with the upper part of a shield beam; the lower part of the shield beam is hinged with the pedestal via the a four-bar linkage mechanism; a tail beam with box-shaped construction is hinged with the lower end of the shield beam, a tail beam lifting jack is equipped between the lower part of the tail beam and the lower part of the shied beam; and a slide track, an inserting plate equipped in the slide track and a inserting plate lifting jack for driving the inserting plate to carry out reciprocating movement along the slide track are equipped in the box of the tail beam. The invention is especially suitable for caving integrated mining working face under pitching coal bed, flat-pitching half hard coal bed and 'three-soft' coal bed conditions.

The invention provides a juice and dreg separation method. According to the method, a first upper press roller and a first lower press roller are arranged from up to down with a preset interval; and the first upper press roller and the first lower press roller are connected through a first synchronizer, so that the first upper press roller and the first lower press roller can rotate with the same rotating speed. A juice and dreg separation device provided by the invention can extract the juice of straw fragments according to the function of dregs after the juice of the straw fragments is extracted, so that straw can be fully utilized.

The present invention relates to the field of nucleic acid extraction, particularly to a nucleic acid extraction method and a kit. The kit comprises a nucleic acid chemical cracking solution and an inhibition component removing solution, wherein the nucleic acid chemical cracking solution comprises guanidinium isothiocyanate, N-lauroyl sarcosine sodium salt and PBS; and the inhibiting component removing solution comprises a mixed solution of an aluminum ammonium sulfate dodecahydrate solution and cross-linked polyvinylpyrrolidone (PVPP) and ammonium acetate. The nucleic acid extraction methodcomprises the following steps of chemically cracking a sample by adopting the nucleic acid chemical cracking solution, removing impurities, adsorbing the nucleic acid, and performing washing, eluting,and collecting to obtain the nucleic acid. According to the method, comprehensiveness and unbiased property in nucleic acid extraction are fully considered, purity and integrity of nucleic acid are also considered, loss in the process is reduced to ensure concentration, nesting can be formed for different types of biological or environmental samples, and broad-spectrum applicability of the extraction method is guaranteed.

The invention relates to a process for rapidly moving the equipment of large-mining-height ordered mining working surfaces. According to the present invention, the working surface to be retracted andthe working surface to be mined are the adjacent ordered mining working surfaces; the working surface to be retracted performs the terminal mining by combining the pre-excavation retracting channel and the net finishing so as to create the conditions for the retracting of the large-volume and large-tonnage comprehensive equipment; and during the installation of the working surface to be mined, thehydraulic bracket and the scraper conveyor are installed after the open-off cut working surface side coal wall is widened to 4 m.

Provided are a modular subgrade box, a steel trestle platform structure and a construction method thereof. The modular subgrade box comprises a subgrade box steel beam, a bottom plate, a top plate, astiffening rib plate and an end seal plate. The steel trestle platform structure comprises a modular subgrade box, a foundation pit structure and a supporting structure of each stage. The steel trestle platform structure comprises a steel beam, a bottom plate, a top plate, a stiffening rib plate and an end seal plate. The construction method is divided into stages. The invention breaks through thetransportation lifeline inside and outside the building, ensures the on-site material transportation, becomes the prerequisite for the smooth construction of the structure on schedule, and verifies the rationality of the temporary construction steel trestle road. Modular components are used to greatly reduce the workload of the site, the temporary construction steel trestle road is set up, and the transportation channel of the structure is opened. Modular components can be reused, practical maneuverability and reference value is greater, in line with the promotion and application of architectural assembly in China, for the future similar projects to provide new construction ideas, with the value of promotion and application.

The invention discloses a vertical airflow type MOCVD (Metal-organic Chemical Vapor Deposition) spray head device with multiple gas mixing chambers. The vertical airflow type MOCVD spray head device comprises a cylindrical closed shell consisting of a top plate, side walls and a bottom plate, wherein the interior of the closed housing is divided into a sealed cavity and a water-cooling cavity by a middle-layer plate; and a cooling water inlet tube and a cooling water outlet tube are arranged on the side walls corresponding to the two ends of the water-cooling cavity, respectively. The vertical airflow type MOCVD spray head device with the multiple gas mixing chambers is characterized in that the sealed cavity is divided into two or more independent and fan-shaped gas mixing chambers by a vertical isolating body; a gas mixing chamber gas inlet pipeline is formed on the side walls or the top plate corresponding to each gas mixing chamber, respectively; and a gas inlet fine hole is communicated with each gas mixing chamber and the MOCVD reaction chamber. The vertical airflow type MOCVD spray head device with the multiple gas mixing chambers can be used for sufficiently mixing two reaction gases before the two reaction gases selectively enter the reaction chamber or can be used for entering the two reaction gases in the reaction chamber in a mutually independent manner, so that the normal transportation of the gases can be ensured, and each single layer can be grown in the most-suitable gas mixing status while a multi-layer structure film material can be grown. The vertical airflow type MOCVD spray head device with the multiple gas mixing chambers is especially beneficial to manufacturing of III-V-family nitride semiconductor materials of high-aluminum components of an ultraviolet apparatus.

The invention discloses a pipeline support structure which comprises a base and a pillar. A support arm is arranged on the upper surface of the pillar, the two sides of the supporting arm are respectively provided with a pipe groove, and elastic protrusions are evenly distributed on the surfaces of the pipe grooves. The pipeline support structure can achieve support of a bidirectional pipeline, furthermore, stress between the pipeline and the pipe grooves is reduced due to arrangement of the elastic protrusions, abrasion of the pipeline is reduced, cost is reduced, and normal transport of the pipeline is effectively guaranteed.

The invention relates to new type air cooling multifunctional air conditioning refrigeration preserving system. It is made up of single screw no oil air compressor, tube ceramics ozone producer, freezing water ozone dissolving groove, ammonia refrigerating machine, ozone de-sorption groove, air cooling machine, cistern, water pump, spray head, preserving bank, pressure regulating water purifier, hot cold air generator. It has the advantages of no Freon air refrigerating, no pollution, no green house effect, and saving energy. It can fully replace the existing preserving technique, and makes people can enjoy secure meet, grain, fruit, and vegetable.

The invention provides a temporary fixing device and a construction method thereof. The device is used for being arranged between an upper buoyancy tank and a lower buoyancy tank in wet towing transportation of a novel semi-submersible type oil production platform. The device is characterized by comprising a plurality of base structures arranged above a deckhead of the lower buoyancy tank, plug pin structures which are in one-to-one correspondence to the base structures and arranged below an underdeck of the upper buoyancy tank and above the base structures, lower internal thread components fixed to the side faces of the base structures, upper internal thread components fixed to the side face of the upper buoyancy tank and located over the lower internal thread components, and studs with two ends fixedly connected with the lower internal thread components and the upper internal thread components respectively, wherein an opening is formed in the middle of each base structure, and each plug pin structure is inserted into the corresponding opening.

The invention belongs to drying equipment for removing liquids from solid materials or products and discloses a rotating drying cylinder. The rotating drying cylinder comprises an outer cylinder and an inner cylinder, the inner cylinder is built in the outer cylinder, a heating channel is formed between the outer cylinder and the inner cylinder, the outer cylinder is connected with a combustor, rolling rings and teeth rings are fixed on an outer circle of the outer cylinder, protruded vibrating bands are arranged on the outer wall of the inner cylinder along an axial direction, inner cavities are mounted on the vibrating bands, and steel balls are placed at positions of the inner cavities. The rotating drying cylinder has the advantages that the structure is simple, material bonding can be effectively prevented, and normal conveying of materials can be guaranteed.

The invention relates to the technical field of warehouse management, in particular to an intelligent warehouse cooperative robot and an application system and method thereof.The intelligent warehousecooperative robot comprises a main controller, a communication module, a positioning module, a navigation module, and a cargo label identification module,wherein the communication module, the positioning module, the navigation module, and the cargo label identification module are connected with the main controller. According to theintelligent warehouse cooperative robot and the application systemand method thereof, the problems that in the existing warehouse management, by adopting manual cargo classification and transportation, storage efficiency is low, and inaccurate classification due tohuman erroraresolved.

The invention discloses a segment caulking and hand hole blocking trolley for a large-diameter shield tunnel, which comprises an arched frame. The arched frame is of an arch shape, the middle part of the arched frame is provided with a through chamber, the bottoms of the two sides of the arched frame are provided with universal wheels, universal wheel clamping plates are arranged on the universal wheels, the upper part of the arched frame is provided with a top construction platform, and the two sides of the arched frame are respectively provided with a side construction platform. The invention has the advantages of: overcoming the defects of the prior art, reducing the construction input and improving the construction efficiency since the mobile trolley can move along with the progress of works; realizing the all-round construction of the top part of the tunnel within 162 degrees and satisfying the construction requirements; due to the arched frame of an arch shape, ensuring the normal transportation of tunnel materials; making the construction safe, eliminating safety risks of the overhead operation, and ensuring the smooth progress of the works; and simplifying the structure and the like.

The invention provides a voltage regulating transformer which comprises a main transformer body and a string transformer body. The main transformer body comprises a main transformer public coil, a main transformer series-connection coil and a main transformer voltage regulating coil, wherein the main transformer public coil and the main transformer series-connection coil are in series connection with a wire inlet end, and the main transformer voltage regulating coil is in electromagnetic coupling with the main transformer public coil and the main transformer series-connection coil. The string transformer body comprises a string transformer primary coil and a string transformer secondary coil, wherein the string transformer primary coil and the string transformer secondary coil are mutually in electromagnetic coupling, the string transformer primary coil is in series connection with a main transformer voltage regulating coil, and the string transformer secondary coil in series connection with the main transformer series-connection coil is connected with a wire outlet end. A rank difference voltage regulating method of the voltage regulating transformer includes the following steps that transmission voltage in the string transformer secondary coil is changed through regulating of the number of turns of the connected main transformer series-connection coil; the number of turns of the connected main transformer voltage regulating coil is regulated, so that sensing voltage in the string transformer secondary coil is changed, the sensing voltage and / or the transmission voltage are / is regulated, so that voltage of the wire outlet end of the voltage regulating transformer is changed, wherein the voltage of the wire outlet end is equal to the algebraic sum of the transmission voltage and the sensing voltage.

The invention discloses a chrome molybdenum vermicular graphite cast iron non-cracking brake drum of high thermal fatigue resistance performance and a production process thereof. The production process comprises the steps of adding 0.40 percent-0.80 percent of ferrochrome and 0.40 percent-1.20 percent of ferrochrome to common vermicular graphite cast iron base iron according to the weight ratio, smelting the vermicular graphite cast iron base iron, performing vermicular inoculation on the vermicular graphite cast iron base iron to obtain chrome molybdenum vermicular graphite cast iron final molten iron, pouring the chrome molybdenum vermicular graphite cast iron final molten iron, cooling and cleaning a poured casting to obtain a chrome molybdenum vermicular graphite cast iron brake drum casting, performing complete austenitizing normalizing treatment on the chrome molybdenum vermicular graphite cast iron brake drum casting at the temperature ranging from 900 DEG C to 950 DEG C by keeping the temperature for 1.0-1.2 hours, machining the chrome molybdenum vermicular graphite cast iron brake drum casting after the chrome molybdenum vermicular graphite cast iron brake drum casting is discharged out of a furnace and cooled down, and checking out the chrome molybdenum vermicular graphite cast iron brake drum casting to obtain the chrome molybdenum vermicular graphite cast iron non-cracking brake drum of high thermal fatigue resistance performance if the chrome molybdenum vermicular graphite cast iron brake drum casting is qualified. By means of the production process, the brake drum of a heavy-load vehicle is durable and unlikely to crack to ensure transportation safety.