328 results about "Asbestos" patented technology

The invention relates to the technical field of fracturing propping agents, in particular to a method for preparing a ceramsite sand fracturing propping agent by taking asbestos ore as a raw material. The ceramsite sand fracturing propping agent comprises inner core particles and an outer layer covering film, wherein the inner core particles comprise the following components in parts by weight: 25-35 parts of asbestos ore, 40-50 parts of bauxite, 10-20 parts of solid waste ceramsite sand, 1-3 parts of a sintering aid, 15-25 parts of potassium feldspar, 3-8 parts of dolomite, 8-12 parts of kaolin, 1-2 parts of titanium oxide and 0.5-1.5 parts of manganese powder; and the outer-layer covering film is modified epoxy resin. The ceramsite sand fracturing propping agent prepared by the invention not only has excellent mechanical property and high flow conductivity, but also has excellent hydrophobic property, so that the service life of the ceramsite sand fracturing propping agent is prolonged.

The utility model relates to the technical field of a high-temperature combustion infrared thermal conductivity combined measurement method, in particular to a gas filtering structure of the high-temperature combustion infrared thermal conductivity combined measurement method, which comprises a mounting shell, one side of the mounting shell is communicated with a gas inlet pipe, the inner side of the mounting shell is fixedly connected with a filter screen which is arranged in an inclined manner, and the filter screen is fixedly connected with a gas outlet pipe. One side, far away from the air inlet pipe, of the mounting shell is communicated with a through pipe, the outer side of the through pipe is provided with a second valve, and the inner side of the mounting shell is fixedly connected with a positioning plate penetrating through one side of the mounting shell. One of the adsorption bottles is filled with asbestos, the other one of the adsorption bottles is filled with a magnesium perchlorate solution, solid particles in the gas are filtered out by the filter screen, then the alkali asbestos and the magnesium perchlorate solution in the adsorption bottles can adsorb CO2 and H2O respectively, and the filtered gas can flow out from the through pipe after the second valve is opened.

The utility model discloses an automation line of a single-chain pneumatic tube type bottle silk-screen printing machine, and aims to solve the problems of low automation level, large occupied area and high cost of the conventional silk-screen printing machine. The automatic line comprises a bottle feeding device, a conveying device, a full-automatic printing machine, a baking device, a bottle discharging device, a fan and a control device. The bottle feeding device pushes materials to a lengthened pin chain of the conveying device through a rubber gear and a pushing air cylinder. The conveying equipment adopts a single-chain design, and accurate conveying of materials is achieved through a second air cylinder and a second ratchet wheel; the baking equipment performs low-temperature drying by using an electric heating tube and heat-insulating asbestos; the bottle discharging equipment achieves automatic collection of materials through a bottle discharging baffle with a slope. The control equipment adopts a PLC (Programmable Logic Controller) and a touch screen, so that the printing speed and the baking temperature can be accurately controlled, and production parameters can be displayed in real time. The automatic line adopts pneumatic control, and is simple in structure, low in cost and high in production efficiency.

The present application relates to a graphite sintering furnace having four spliced insulation panels that can be removably spliced to form a square insulation lining. The insulation lining is mounted on a support seat, and an adjustable tightening device abuts and tightens against a second side surface. Multiple adjustable tightening devices are used to tighten the four spliced insulation panels. The spliced insulation panels are, from the outside to the inside, sequentially composed of a first ceramic fiber board layer, an asbestos felt layer, a first graphite felt layer, and a first graphite board layer, with the asbestos felt layer and the first graphite felt layer being filled and disposed between the first ceramic fiber board layer and the first graphite board layer. Only the burned spliced insulation panels need to be replaced, without replacing the entire insulation lining, thereby avoiding waste of a portion (the unburned side) of the insulation lining and reducing the replacement and maintenance costs of the insulation lining. Furthermore, the spliced insulation panels have good thermal insulation performance, thereby improving the thermal insulation performance of the insulation lining and preventing heat dissipation within the insulation lining to the greatest extent possible, thereby resolving related problems in the prior art.

The present invention relates to a coking inhibitor for waste heat boilers, belonging to the technical field of ash cleaning for smelting equipment. The components of the coking inhibitor for waste heat boilers of the present invention include: asbestos powder, manganese dioxide, aluminum oxide and ammonium carbonate. The present invention can control the coking thickness of the convection tube bundle and there is a peeling phenomenon, slow down the growth rate of the coke body, effectively solve the adhesion problem of the flue gas system of the fluidized bed boiler waste heat boiler, and reduce the safety and environmental protection risks.

This invention belongs to the field of iron and steel smelting technology, and particularly relates to a protective device and manufacturing method for a converter movable fume hood lifting lug. It includes lifting lugs and a movable fume hood. The lifting lugs are welded to the movable fume hood. A protective cover with an internal interlayer, matching the outer contour of the lifting lug, is hung on the outside of the lifting lug. The two sides of the interlayer of the protective cover are connected by ribs. Several V-shaped anchoring nails are welded to the interlayer wall of the protective cover. Refractory grout is filled into the interlayer of the protective cover. Asbestos is laid between the protective cover and the lifting lug. One end of the protective cover is welded to the movable fume hood. Several round rod hanging lugs are welded to both sides of the protective cover, and the upper ends of the round rod hanging lugs are hung on the lifting lugs. This invention isolates the lifting lug from the heat source through the protective cover, preventing the lifting lug from being burned. While the protective cover is fixed to the lifting lug and the movable fume hood, it reduces the contact area, thereby reducing heat transfer.

The invention relates to a method for the remediation and processing of demolition material containing pollutant-containing mineral components, wherein the method comprises the following steps: breaking up the demolition material to separate the pollutant-containing mineral components; dry or wet classifying the broken-up demolition material to separate at least one fraction from it; wet sorting the separated fraction to separate it into a pollutant-free mineral part and a pollutant-containing part, wherein in the wet sorting step the separated fraction is placed in a flowing liquid to separate pollutant-free mineral and pollutant-containing components of the separated fraction according to density, and thus to obtain the pollutant-free mineral part and the pollutant-containing part from the separated fraction.Another aspect of the invention relates to a system for the remediation and processing of demolition material containing pollutant-laden mineral components. These pollutants can include, for example, asbestos or radioactive contaminants.

The brake lining for the railway vehicle comprises a back plate used for being connected with the vehicle, a first groove is formed in the side wall of the back plate, a friction plate made of non-asbestos organic materials is fixedly connected to the side wall of the back plate, the corners of the friction plate are subjected to chamfering treatment, and the first groove is formed in the side wall of the back plate. Scale marks are fixedly connected to the side wall of the friction plate, a cross-shaped groove is formed in the friction plate, the friction plate is arranged, the friction plate is made of non-asbestos organic materials, the friction coefficient of the non-asbestos organic materials is low, aggressiveness to a brake disc is smaller, braking noise can be remarkably reduced, and the service life of the brake disc is prolonged. The friction plate is subjected to straight chamfering treatment, the noise performance under the cold-state working condition can be improved, the cross-shaped groove is formed in the upper end of the friction plate, and the braking noise can be further reduced by increasing the heat dissipation area of the friction face and improving the stability of the friction film through the design of the cross-shaped groove.

The utility model relates to the technical field of pipes, in particular to an underground drainage steel belt reinforced HDPE spiral corrugated pipe which comprises an HDPE pipe body and a protection assembly, the protection assembly comprises an inserting opening, a birdmouth, a fireproof layer, a waterproof layer, a filling layer and a connecting part, when a plurality of pipe bodies are connected, the inserting opening and the birdmouth are connected through the connecting part, and the pipe bodies are connected through the fireproof layer, the waterproof layer, the filling layer and the connecting part. The waterproof layer is installed in the HDPE pipe body, water leakage is effectively prevented, the fireproof layer is installed outside the HDPE pipe body, the fireproof layer is made of asbestos fireproof materials and has a certain heat preservation effect, combustion of the HDPE pipe body caused by special conditions is effectively prevented, the filling layer is arranged in the pipe, the toughness and strength of the HDPE pipe body are improved, and the service life of the HDPE pipe body is prolonged. The adaptability of the HDPE pipe body is improved, so that the HDPE pipe body can be used in various environments.

The utility model provides a wear-resistant asbestos rubber brake block, which comprises a brake block body and a brake block back plate, the brake block body comprises an asbestos rubber base layer, a first functional layer and a second functional layer, the first functional layer comprises a carbon fiber reinforcement layer and a silicon nitride ceramic particle layer, and the second functional layer comprises a carbon fiber reinforcement layer and a silicon nitride ceramic particle layer. The second functional layer comprises a high-purity graphite powder coating and a nitrile rubber wear-resistant layer, and the first functional layer is arranged on the outer surface of the asbestos rubber base layer. The first functional layer comprising the carbon fiber reinforcement layer and the silicon nitride ceramic particle layer is arranged, the carbon fiber reinforcement layer can remarkably improve the tensile strength and rigidity of the brake block body, deformation in the long-term use process is prevented, the abrasion resistance of the brake block body is improved, and the brake block body can better resist friction and abrasion; the silicon nitride ceramic particle layer can effectively improve the hardness and the wear resistance of the surface of the brake block body, reduces the direct contact wear with a brake disc, and prolongs the overall service life.

It is provided a process for extracting nickel sulfate from mining ores, such as serpentine, comprising the steps of conducting a magnetic separation of the mining ores producing a magnetic fraction and a non magnetic fraction; leaching the non magnetic fraction with HCI producing a slurry comprising metals chloride; filtrating the slurry producing a metals chloride liquor; purifying the metals chloride liquor producing a magnesium chloride solution; separating an iron-nickel cake from the magnesium chloride solution; leaching the cake together with the magnetic fraction producing a metallic sulfate solution; extracting nickel and cobalt from the metallic sulfate solution by a ion exchange resin extraction and stripping producing an inorganic stripped phase; submitting the inorganic stripped phase to a liquid-liquid extraction producing a nickel concentrated phase; and evaporating and drying the nickel concentrated phase to recuperate nickel sulfate.

The application discloses a casting process for a large four-cylinder diesel engine cylinder cover, which comprises the following steps: S1, core making; S2, sand core assembling; S3, pouring; and S4, mold opening. In the core making process, each sand core part is perforated, so that the sand amount is reduced, the hollowing process is realized, the overall weight of the sand core is reduced, the gas emission amount during the combustion of the sand core in the pouring process is reduced, and the gas discharge is facilitated; meanwhile, a coating and an asbestos pad are coated on the surface of each sand core, one-way gas discharge is realized, the exhaust passage is effectively prevented from being infiltrated with molten iron and losing effectiveness, and the pouring quality is ensured.

Conventional removal tools have difficulty completely removing asbestos-containing adhesive layers, especially those that exist under thin paint or flooring materials. The cutting edge tends to slip on the surface of the adhesive layer, and additional sanding work is required with a sander to remove any remaining adhesive layer, resulting in poor work efficiency. [Solution] In this peeling tool, which is attached to a handheld electric impact device, the flat blade base, consisting of the base end side of the joining notch and the front side of the flat blade, is made of die steel, and the cutting edge is made of high-speed steel, allowing the cutting edge to penetrate into the concrete surface even in thin adhesive layers, enabling efficient and reliable peeling and removal of the adhesive layer. Setting the inclination angle of the cutting edge to 15° to 45° enables even more effective removal.

The invention discloses a three-layer laminated forming sheet metal part rolled into uniform concave-convex and a manufacturing process thereof, and belongs to the technical field of sheet metal part manufacturing technologies, and the sheet metal part comprises an inner-layer aluminum plate, a middle layer and an outer-layer aluminum plate; the surface of the inner-layer aluminum plate and the surface of the outer-layer aluminum plate are both provided with evenly-distributed concave-convex points in a rolling mode, the middle layer is a heat-insulation, heat-preservation and noise-reduction environment-friendly asbestos-free material layer, the inner-layer aluminum plate and the outer-layer aluminum plate are both made of aluminum plates, and the even concave-convex points are rolled on the surfaces of the inner-layer aluminum plate and the outer-layer aluminum plate, so that the surface area of the plate is effectively increased. The strength of the plate is enhanced, the problem that a flat aluminum plate is soft is solved, and the plate can better adapt to various use scenes; on the premise that the strength is guaranteed, the aluminum plates are adopted as inner and outer layer materials, compared with a traditional aluminum-plated plate three-layer structure, the weight is reduced, and the requirement for light weight is met.

Systems, methods, and other embodiments for removing contaminated materials such as asbestos from railcars (i.e., train cars and subway cars) for subsequent recycling of the railcars. In particular, a collapsible inner containment structure having a HEPA negative air pressure is used. A door on the inner containment structure is opened at one end of the inner containment structure and a railcar is transported into a work area located within the inner containment structure. The door is then closed so that the inner containment structure can maintain the negative pressure within the inner containment structure. The contaminated materials such as asbestos are removed from the inside of the railcar using a mixture of pressurized water and media.

The utility model discloses a high-altitude melting furnace, which relates to the technical field of glass production, the high-altitude melting furnace is used for high-altitude glass production, the high-altitude melting furnace comprises a melting part, a clarifying part and a forming part, the melting part is used for melting glass raw materials into glass liquid; the clarification part is connected to the melting part and is provided with a clarification runner, the clarification runner is used for clarifying molten glass, and the tank wall of the clarification part is respectively provided with an electric smelting zirconia corundum brick, a clay brick and an asbestos-free calcium silicate board from one end close to the clarification runner to one end far away from the clarification runner; the forming part is connected to the clarifying part and is provided with a forming runner, the forming runner is used for converting liquid glass liquid into plastic glass liquid, a neck is arranged between the forming part and the clarifying part, and the neck is provided with a neck water bag which can be inserted into the glass liquid and is adjustable in depth. The technical scheme provided by the utility model aims to improve the glass production qualification rate and quality of the melting furnace in high-altitude areas.

The utility model discloses an asbestos-free brake pad inspection knocker, which relates to the field of asbestos-free brake pad inspection, solves the problem that the existing device is difficult to efficiently knock and detect corresponding positions on an asbestos-free brake pad according to requirements, and adopts the following scheme that the asbestos-free brake pad inspection knocker comprises a working table plate, the top of the working table plate is fixedly provided with a front guide assembly and a rear guide assembly which are opposite in position and a knocking assembly installed on the front guide assembly and the rear guide assembly. A main body of the knocking assembly is a second motor, and an output shaft of the second motor is fixedly sleeved with a shaft seat, a fulcrum shaft and a knocking ball at the outer end of the fulcrum shaft. According to the detection knocker for the asbestos-free brake pad, the position of the knocking assembly can be obliquely adjusted through driving of the electric cylinder base, the contact position of the knocking assembly and the asbestos-free brake pad limited on the limiting assembly is adjusted, the second motor drives the fulcrum shaft and the knocking ball to rotate and impact the asbestos-free brake pad, and the effect of knocking the corresponding position of the asbestos-free brake pad is achieved.

The utility model discloses a wear-resistant PC board, which comprises a PC board body, the PC board body is composed of an internal structure layer, a middle heat insulation layer and an external wear-resistant layer, the internal structure layer, the middle heat insulation layer and the external wear-resistant layer are formed by hot pressing, the internal structure layer is the innermost layer of the PC board body, and the external wear-resistant layer is the outermost layer of the PC board body. And the middle heat insulation layer is positioned between the internal structure layer and the external wear-resistant layer. The heat insulation effect of the PC board body is improved through the middle heat insulation layer which is of a double-layer structure and made of asbestos materials, and the wear-resistant effect of the outer layer of the PC board body is improved through the fact that the semicircular wear-resistant strips which are made of vulcanized rubber materials and are tightly arranged are matched with the wear-resistant coating composed of resin rubber and adhesives. The PC board body is provided with the wear-resistant coating mixed with the wear-resistant ceramic particles, so that the wear-resistant effect of the surface layer of the PC board body can be improved, and the service life of the PC board body can be prolonged.

The invention belongs to the technical field of road buried glass fiber reinforced plastic mortar pipe culvert construction, and particularly relates to a solid waste resourceful treatment method for double-row glass fiber reinforced plastic mortar pipe construction, which comprises the following steps of: vertically excavating a foundation pit, supporting by using Larsen U-shaped steel sheet piles, compacting a base, and replacing and filling undesirable soil with natural gravel soil. After the base is accepted and accepted, an inverted filter layer is laid, and gravels of 20 cm are laid. Reinforced concrete end and middle prefabricated blocks are prefabricated in a factory, and asbestos cushion layers are attached into the prefabricated blocks. And the elevation and the axis of the pipe culvert are accurately measured, a temporary weight is arranged in the pipe culvert to prevent floating, the double-row glass fiber reinforced plastic sand inclusion pipe culvert is hoisted in place, and cushion layer attachment is checked. The method comprises the following steps: mixing and pouring mixed slurry consisting of solid waste ash and quick-hardening cement by using special equipment, backfilling the mixed slurry until the elevation of an excavated pavement is below 30cm, then backfilling slag to the excavated surface of the roadbed, and compacting by using a light road roller. And entering a curing period after compaction. According to the method, solid waste resource utilization with the liquid fly ash and the furnace slag as the core is achieved, and the construction efficiency is remarkably improved.

The invention relates to the field of thermal battery manufacturing, and discloses automatic punching equipment and method for an asbestos ring for a thermal battery. The equipment comprises a rack, a movable platform, a punching mechanism and a ring collecting mechanism. The moving platform is driven by a servo motor to achieve accurate positioning and pressing of asbestos paper. The punching mechanism drives an inner cutting die and an outer cutting die which are coaxially arranged through an impact air cylinder to complete punching. During demolding, the jacking driving mechanism drives the inner cutting die to eject out the ring piece, the outer diameter of the asbestos ring is larger than the caliber of the outer cutting die through the elasticity of the asbestos ring, and therefore the asbestos ring automatically falls off and is collected through the ring collecting device. The full-process automatic production is realized, the problems of low manual punching efficiency and poor product consistency are solved, and the production efficiency and the product quality are remarkably improved.

The invention belongs to the technical field of building materials, and particularly relates to high-performance CFB ash clinker-free cement and a preparation method thereof. The high-performance CFB ash clinker-free cement provided by the invention is prepared from the following raw materials: a base material (CFB fly ash, ground CFB slag, S95 mineral powder, silica fume and desulfurized gypsum) and a composite modifier (calcium chloride, a polycarboxylate superplasticizer, aluminum sulfate, propyl p-hydroxybenzoate, nano silicon dioxide, nano calcium oxide, chrysotile nanofiber and hydrated magnesium silicate nanofiber). The high-performance CFB ash clinker-free cement provided by the invention does not contain clinker, does not need calcination treatment, has the advantages of early strength, high strength, micro-expansion and good durability, and also has the characteristics of prevention and reduction of cracking, greenness, energy conservation, environmental protection, high solid waste dosage utilization, low production cost and long service life.

The invention discloses a four-claw alignment tool clamp for machining an asbestos traction roller and a working method of the four-claw alignment tool clamp. The four-claw alignment tool clamp comprises a clamp body, a fan-shaped push block and a cylindrical block. The fixture body is a cylindrical two-stage step shaft, a first through hole is formed in the cylinder at one end of the fixture body, a blind hole is formed in the cylinder at the other end of the fixture body, fan-shaped blind holes are symmetrically formed in the inner side of the first through hole, the fan-shaped push blocks are installed in the fan-shaped blind holes, threaded through holes are formed in one sides of the fan-shaped blind holes, and the threaded through holes are communicated with the threaded through holes. A threaded through hole is formed in the end face of one end of the clamp body, a jackscrew is installed in the threaded through hole, the cylindrical block is installed on the end face of one end of the clamp body, a second through hole is formed in the cylindrical block, the first through hole, the second through hole and the blind hole are coaxially formed, the diameter of the first through hole is the same as that of the second through hole, and the blind hole in the clamp body is formed. The clamping and positioning precision is improved, the machining efficiency of the asbestos traction roller is greatly improved, and meanwhile the product quality requirement of a production line is met.

The invention discloses an automatic forming hydraulic machine for asbestos-free friction plate production, and relates to the technical field of asbestos-free friction plates, the automatic forming hydraulic machine comprises a base, a vertical cylinder is vertically arranged on the upper portion of the base, a rotating disc is rotatably arranged outside the vertical cylinder, and a plurality of mold cavities are formed in the position, close to the edge, of the upper portion of the rotating disc in an annular matrix mode; a bottom plate is longitudinally and slidably arranged in the mold cavity, a moving ring is longitudinally and slidably arranged at the position, above the rotating disc, of the outer portion of the vertical barrel in a sleeving mode, and a hydraulic cylinder is installed at the top of the vertical barrel. According to the automatic forming hydraulic machine for production of the asbestos-free friction plate, the servo motor drives the gear transmission system to drive the rotating disc to achieve periodic rotation, and automatic filling of raw materials can be continuously and accurately completed in combination with cooperation of the charging barrel and the mold cavity. In the rotating process of the rotating disc, the mold cavities sequentially pass through the feeding station, the pressing station and the demolding station, and through cooperative control of the hydraulic system and the material pushing mechanism, the downward pressing forming action and the material pushing ejection action of the upper mold head form coherent connection.

The invention relates to the technical field of building materials, and particularly discloses a green and environment-friendly thermal insulation building material and a preparation method thereof. The invention relates to a green environment-friendly thermal insulation building material, which comprises the following raw materials by weight: 20-30 parts of modified epoxy resin; 10 to 15 parts of polyurethane; 5 to 10 parts of flame-retardant vermiculite; 5 to 10 parts of kaolin; 6-10 parts of perlite powder; 8-12 parts of volcanic ash; 5-8 parts of asbestos; 5-8 parts of fly ash; 1-5 parts of a flame retardant; 5-10 parts of calcium carbonate; 3-6 parts of a heat stabilizer; 2-4 parts of a curing agent; and 100 to 150 parts of water. According to the heat-preservation and heat-insulation building material, the phosphorus-containing flame-retardant groups are grafted on the epoxy resin, and a phosphide film formed by heating phosphorus elements can effectively isolate oxygen and inhibit a combustion reaction, so that the flame-retardant property of the building material is effectively enhanced.

The utility model discloses a roller casting sand box mould, which relates to the field of sand box moulds and comprises a sand box mould body, a molten iron inlet is arranged on one side of the bottom end of the sand box mould body, an insulated riser box is sleeved on the outer side of the sand box mould body, and flanges matched with the sand box mould body are arranged at two ends of the insulated riser box. A cavity is formed in the sand box mold body, box handles are arranged at the two ends of the heat preservation riser box, and baffle rings are arranged on the sides, away from the heat preservation riser box, of the box handles. According to the utility model, the layered cavities are designed in the sand box mold body for heat preservation, and spaces for placing asbestos are arranged in the layered cavities, so that the heat preservation performance is provided for the sand box mold body, the heat dissipation of molten iron in the box is reduced, and the liquid-solid conversion is slowed down, thereby controlling the solidification sequence of each part in the roller casting process.

The application discloses a combined high-g-value half-sine shock waveform generator and method, which comprises a gas storage tank, a launching cylinder, a combined waveform generator and a shock piston. A quick release device is arranged in the gas storage tank to instantaneously release compressed gas, and the compressed gas pushes the shock piston to move linearly along the launching cylinder at an acceleration. The shock piston collides with the combined waveform generator, an acceleration sensor on the shock piston records the acceleration signal of the shock process, and reflects the shock waveform experienced by the test piece. The combined waveform generator is composed of three material media of fiber non-woven fabric, polyurethane and asbestos. By changing the proportion of the three material media, the problem of strong nonlinearity of a single material medium can be corrected, and a high-g-value half-sine shock waveform complete in waveform and meeting a standard tolerance band can be obtained under high-speed impact. The application solves the problem of nonlinear mechanical behavior of a single material medium under high overload impact, and obtains a half-sine waveform meeting the standard tolerance band.

The invention discloses a special-shaped complex thin-wall integral precision casting heat preservation patch design method in the technical field of precision casting, which comprises the following steps of: accurately and orderly controlling a temperature field in a forming process of a high-integration special-shaped complex thin-wall integral precision casting by designing a high-adaptation asbestos heat preservation patch; sequential solidification from the special-shaped complex thin wall to the riser and efficient feeding of the riser to the special-shaped complex thin wall are achieved, the problem of looseness of the special-shaped complex thin wall is effectively solved, an accurate simulation boundary condition database of the special-shaped complex thin wall is established through temperature measurement test and simulation software reverse calculation, traditional experience trial and error and extensive process design are broken through, and the accuracy of the special-shaped complex thin wall is improved. According to the method, the forward and lean process design based on precise simulation is achieved, lean production of high-integration special-shaped complex thin-wall integral precision castings is achieved, the product quality is effectively improved, the development period is greatly shortened, and the production cost is greatly reduced.

The utility model relates to a fluidized bed furnace distribution plate sealing structure which comprises a furnace shell, a distribution plate, an air bellow, an I-shaped steel beam and an inner supporting plate. A plurality of distribution plates are laid above the I-shaped steel beam above the air bellow; the device further comprises a first welding arc-shaped elastic material plate, a second welding arc-shaped elastic material plate, a bolt, an asbestos pad and a third welding arc-shaped elastic material plate. The structure can prevent the problem of weld crack caused by overlarge temperature difference and prevent leaked air from being blown out from a furnace corner.

The utility model discloses a high heat-resistant engine suspension structure, which relates to the technical field of automobile parts and comprises a structure main body, a heat insulation gasket and a heat insulation sleeve, a second mounting bracket is mounted at the top end of the structure main body, and a first mounting bracket is mounted on one side of the structure main body. Heat insulation gaskets are arranged above the second mounting bracket and on one side of the first mounting bracket, insertion holes are formed in the front ends and the rear ends of the heat insulation gaskets, fixing springs are mounted at the front ends and the rear ends of the first mounting bracket and the second mounting bracket, and limiting plates are mounted at one ends of the fixing springs. Through the heat insulation sleeve with the air heat insulation cavity inside, external heat is isolated from the structure body by means of low heat conductivity of air, the heat is further blocked through the heat insulation gasket made of asbestos, glass fiber and other materials, and a heat transfer path is effectively blocked.

The utility model provides a preheater flap valve shaft hole sealing device which is characterized by comprising a flap valve outer shell, a protective shell welded to a shaft hole of the flap valve outer shell, a shaft rod and a sealing assembly. The gap between the protective shell and the shaft rod is larger than the gap between the shaft hole of the original shell; the sealing assembly comprises three graphite packings with the thickness of 12 mm, the space between the protective shell and the shaft rod is sequentially filled with the graphite packings, and the graphite packings are limited and fixed through an end face baffle. The baffle is pressed tightly through screws and nuts which are evenly distributed on the periphery of the baffle, and adjustable sealing press fit is achieved. Compared with a traditional single-layer 3mm asbestos plate sealing structure, the sealing service life is prolonged by more than three times by enlarging the space of the sealing cavity and arranging multiple layers of graphite packing, meanwhile, the gap between the baffle and the shaft rod is reduced, and the problem of air leakage at the shaft end is effectively solved. The device is simple in structure and particularly suitable for long-term stable sealing of the shaft end of the flap valve under the high-temperature working condition.