43 results about "Joint heat" patented technology

The invention provides a quadruped robot joint heat dissipation structure based on modular design, and relates to the technical field of robots. Comprising a first motor module, a second motor module connected with the output end of the first motor module, a third motor module connected with the output end of the second motor module and a mechanical leg connected with the output end of the third motor module. The heat dissipation base is sleeved outside the first motor module, and the first motor module is connected with the quadruped robot body; a heat dissipation cover plate is arranged on the outer wall of the second motor module; the third motor module is connected with the second motor module through a heat dissipation connecting piece; through the arrangement of the heat dissipation surrounding pieces, the heat dissipation openings, the heat dissipation connecting pieces, the semi-open type heat dissipation base and the heat dissipation cover plate, the heat retention rate between the first motor module, the second motor module and the third motor module and the first connecting piece and the second connecting piece can be effectively reduced, and the heat dissipation capacity is improved; and the working efficiency of the quadruped robot is guaranteed.

The invention relates to the field of pipeline welding, in particular to a prediction model construction method, system and equipment of a heat affected zone and a prediction method. The method comprises the steps that phase change parameters of a metal microstructure phase change model are corrected based on a thermal simulation test; building a heat affected zone microstructure finite element prediction model according to the circumferential weld simulation calculation finite element model; and correction is carried out based on a heat affected zone hardness test and a small punch test correlation parameter correction method, and the heat affected zone strength prediction model is trained by using the expansion database to obtain the pipeline welding joint heat affected zone strength prediction model. Based on a material performance determination test, a finite element model construction method and a finite element model expansion database mode, the accuracy of the heat affected zone strength prediction model is greatly improved, the research cost is reduced, the prediction from a microstructure to macroscopic performance is realized, and the method is suitable for popularization and application. And the defect that the softening mechanism of the hot area material cannot be clarified by traditional macroscopic mechanical property test analysis is overcome.

The invention discloses a high-temperature superconducting coil structure, and relates to the technical field of superconducting magnets, and the main points of the technical scheme are that the high-temperature superconducting coil structure comprises a solenoid superconducting coil which is arranged in a layer winding manner and is internally provided with a first cooling channel arranged along the axis direction of a wire; the shunt bypasses are arranged on the solenoid superconducting coil at intervals, and second cooling channels are arranged in the shunt bypasses; wherein the shunt bypass and the solenoid superconducting coil are connected in a lap joint mode to form a connector, and at least one longitudinal cooling hole for communicating the first cooling channel with the second cooling channel is formed in the connector. While the inherent thermal stability and safety of the magnet are improved, the number of coil joints is greatly reduced, and heat generated by the joints is reduced; the superconducting magnet is divided into multiple sections by the shunt bypasses which are connected in parallel, and the shunt bypasses serve as a refrigerant inlet and outlet of the magnet and also serve as a rapid energy release and energy transfer loop during magnet quenching protection, so that the cooling efficiency of the magnet is improved, and the energy release speed of a magnet quenching section is increased.

The invention discloses a joint heat dissipation structure and a robot in the technical field of robots. The joint heat dissipation structure comprises a joint, the joint is provided with a shell, a containing cavity is formed in the inner side of the shell, a motor is fixedly arranged in the containing cavity, the joint heat dissipation structure is further provided with a heat dissipation assembly used for reducing the temperature in the containing cavity, the heat dissipation assembly is a pulsating heat pipe, and the pulsating heat pipe comprises an evaporation section and a condensation section. The evaporation section is attached to the outer wall of the motor, and the condensation section is attached to the inner wall of the shell. The pulsating heat pipe is used for heat dissipation, based on the phase change heat transfer principle, no extra fan or pump is needed, self-oscillation flowing is achieved completely through thermal driving, and the overall energy consumption of the robot is remarkably reduced. The pulsating heat pipe is small in occupied space, light in weight, simple in structure, low in maintenance cost and suitable for long-term operation, and joint movement flexibility and load capacity are effectively improved; the condensation section is attached to the inner wall of the shell, the joint shell can be heated while heat dissipation is conducted, and the warm touch feeling can be provided without extra energy consumption.

Provided in the present application are a heat-insulating system of a B-type independent liquid tank, and a ship. The heat-insulating system comprises: prefabricated heat-insulating plates arranged on the outer surface of a liquid tank, wherein the side surface of each prefabricated heat-insulating plate is of a step shape; fixing assemblies arranged at joints of the prefabricated heat-insulating plates, wherein each fixing assembly comprises a fixing column and a U-shaped fixing member, two flanges are provided at the top of each U-shaped fixing member, the flanges are arranged on the stepped side surfaces of the prefabricated heat-insulating plates, and each joint between inner heat-insulating layers is filled with an elastic heat-insulating joint-filling material; heat-insulating plug blocks, U-shaped areas of the U-shaped fixing members being filled therewith; joint heat-insulating plates, each of which is arranged in a joint between adjacent outer heat-insulating layers, each joint heat-insulating plate being connected to the prefabricated heat-insulating plates, an extending overlap layer, the U-shaped fixing member and the heat-insulating plug block; and joint protection layers, each of which is laid on the upper surface of a joint between two adjacent prefabricated heat-insulating plates. The present application simplifies the product structure, shortens the design period, simplifies the mounting process, and reduces costs.

The utility model discloses a 3d vacuum insulated panel without abutted seam heat leakage. The 3d vacuum insulated panel comprises a lower barrier film, a base layer core material, a surface layer core material and an upper barrier film, the base layer core material is arranged on the lower barrier film, the multiple surface layer core materials are evenly arranged on the base layer core material, a deformation strip groove is formed between every two adjacent surface layer core materials, the upper barrier film is arranged on the surface layer core materials, and the inner side of the edge of the upper barrier film and the inner side of the edge of the lower barrier film are heat-sealed together. A bonding part is formed on the outer side of the edge of the upper barrier film. The utility model further discloses a heat preservation box. According to the heat preservation box, the base layer core material and the surface layer core material are arranged, due to the effects of the barrier film and the base layer core material, after the heat preservation box is folded along the deformation strip grooves, the problem of abutted seam heat leakage does not exist in the folding positions, and therefore the heat preservation effect of the heat preservation box is better.

The invention relates to a heat dissipation structure of a robot, and belongs to the technical field of robot heat dissipation, the heat dissipation structure comprises a robot joint heat dissipation device, a joint arm and a power transmission assembly, the robot joint heat dissipation device comprises a band-type brake body, a band-type brake rotor integrated axial flow fan, a rotor fixing shaft, a motor rotor and a stator, and a fixing shell is arranged on the outer side of the stator; and the brake fixing shell, the PCB control board and the brake fixing shell form an annular air duct. The device further comprises a rear cover, a stepped flow guide ring, a double-code disc, a buffer gasket and a sealing end cover, the power transmission assembly is composed of a synchronous wheel and a synchronous belt and drives the joints to move, accurate heat dissipation of multiple components is achieved through the integrated fan and the flow guide ring, space energy consumption is saved through cooperation of power and heat dissipation, and meanwhile transmission stability and protection performance are improved; and the device adapts to various robot joints, and the maintenance and adaptation cost is reduced.

The utility model is suitable for the technical field of thermal shrinkage intermediate joints, and provides a waterproof insulated sealed thermal shrinkage intermediate joint, which comprises a joint thermal shrinkage sleeve, the cable joint is arranged on the inner side wall of the joint thermal shrinkable sleeve; the connecting sleeve is integrally formed at one end of the joint thermal shrinkable sleeve in an injection molding manner; the cable thermal shrinkable sleeve is integrally formed at one end, far away from the joint thermal shrinkable sleeve, of the connecting sleeve through injection molding; the annular inner rib is adhered and fixed on the inner side wall of the cable thermal shrinkable sleeve through an adhesive; the fixing block and the five limiting blocks are adhered and fixed on the outer side wall of the cable thermal shrinkable sleeve through an adhesive, and the fixing block is positioned on one side of the five limiting blocks; the cable thermal shrinkable sleeve after thermal shrinkage deformation is pressed on the outer wall of the cable again through the fastening binding strip, so that tight and firm connection between the cable thermal shrinkable sleeve and the cable can be ensured, the cable thermal shrinkable sleeve is prevented from falling off from the cable under the action of external force, the sealing performance of the cable thermal shrinkable sleeve after thermal shrinkage is ensured, and the waterproof capability is further ensured.

The invention relates to a heat treatment method of 3003 aluminum alloy and a gas distribution disc, in particular to the field of vapor deposition, and the heat treatment method comprises the steps of first high-temperature rapid annealing, oil cooling, heat preservation treatment, furnace cooling, second high-temperature rapid annealing and water cooling which are carried out in sequence; the heating rate of the first high-temperature rapid annealing is greater than that of the second high-temperature rapid annealing; the heat preservation temperature of the first high-temperature rapid annealing is lower than the heat preservation temperature of the second high-temperature rapid annealing. According to the heat treatment method provided by the invention, through combined heat treatment of high-temperature rapid annealing and heat preservation treatment, the heat-treated 3003 aluminum alloy has good processability and can be used without the processes of leveling and the like after being subjected to a series of processing, and the preparation efficiency of gas distribution is remarkably improved.

The invention discloses a fixed flash welding and joint heat treatment method for a U75VH online heat treatment steel rail for a heavy haul railway, which can ensure that a fixed flash welding joint of the U75VH online heat treatment steel rail for the heavy haul railway is a normal pearlite structure by optimally designing parameters of a joint fixed flash welding process and a joint heat treatment heating process. Abnormal structures such as bainite, martensite and secondary cementite do not exist, the strength, hardness and toughness of the joint are matched with the performance of a base material, and the requirement of a heavy haul railway for the smoothness of the steel rail joint can be met. And the risk that the steel rail is fractured due to'saddle-shaped 'abrasion caused by too large hardness difference of a welding area or a microscopic abnormal structure of a joint in the line service process is improved, and the line operation safety is guaranteed.

The invention relates to the technical field of potassium sulfate preparation, and particularly discloses an intelligent electric heating system for preparing potassium sulfate by a Mannheim method, the intelligent electric heating system comprises an input conveyor belt, an output conveyor belt and a heating furnace body, the outer side of the heating furnace body is provided with a middle heat tracing source supply mechanism and an electromagnetic heating source supply assembly; a heat source is preferentially conducted to the position of the thin-wall junction heat-conducting fin to assist heat conduction of the temperature-conducting thin-wall surface, then the heat source is guided to the side face of an inner cavity of the multilateral air inlet chamber through the obtuse-angle flow guide page, and the heating reaction rate of potassium sulfate in the middle of the heating furnace body is increased through the temperature conduction effect generated by the multilateral air inlet chamber and the thin-wall junction heat-conducting fin. Meanwhile, when a heat source is continuously input, heat source airflow returning to the air inlet closing opening from the side face of the inner cavity of the multilateral air inlet chamber flows again to a narrow-diameter space formed between the air supply outer ring sleeve and the heating furnace body, and the preheating transition stability of the heating furnace body and the multilateral air inlet chamber during continuous heat tracing and temperature increasing is ensured; the adaptability of the potassium sulfate during continuous heating reaction is improved.

The invention relates to the technical field of waterproof construction, in particular to a zero-carbon building roof deformation joint heat preservation structure which comprises a cover plate, a mounting rod is vertically and fixedly mounted on the lower surface of the cover plate, a plurality of air cavities are formed in the mounting rod, and a corrugated pipe is fixedly mounted on the surface of the mounting rod; the mounting rod is slidably sleeved with a plurality of sets of heat preservation components, each heat preservation component comprises two flexible heat preservation bodies slidably arranged on the mounting rod in a sleeving mode, and a mounting plate is fixedly mounted at one end of the corrugated pipe; the cavity wall of the air cavity is provided with an air vent, piston plates are vertically arranged in the air cavity in a sliding and sealing mode, the upper surface of the cover plate is provided with a penetrating opening corresponding to the sliding opening in position, a sliding rod is fixedly installed between the multiple piston plates, the sliding rod is inserted in the sliding opening in a sliding and sealing mode, and the top end of the sliding rod penetrates out of the penetrating opening. And the length of the flexible thermal insulation body can be quickly adjusted according to the size of the deformation joint to be subjected to thermal insulation treatment until the deformation joint is subjected to thermal insulation, so that the practicability is improved.

The invention discloses a fabricated building steel structure energy-saving system. The system comprises a vertical load-bearing steel column, a horizontal load-bearing steel beam and a heat bridge blocking system cooperatively arranged on the steel column and the steel beam. The heat bridge blocking system is composed of a node heat bridge blocking unit, a component heat bridge blocking unit, a joint heat bridge blocking unit and a detachable upgrading unit. The node heat bridge blocking unit adopts a cooperative connection structure of a metal end plate, a non-metal heat insulation block and a through bolt to realize disconnection of a metal heat conduction path of a connection node and reliable load bearing; according to the component heat bridge blocking unit, a closed cavity and a heat insulation medium are arranged in non-key stress areas of a steel column and a steel beam, so that a heat conduction path is prolonged; the joint heat bridge blocking unit is provided with a hasp seat with a heat insulation insertion strip and a U-shaped groove with a sealing heat insulation assembly through a steel column and a steel beam. And a detachable upgrading unit. According to the system, a node-component-joint omnibearing heat bridge blocking system is formed, the energy-saving effect is remarkably improved, and the system is adaptive to the whole life cycle of a building.

The present invention discloses a flash welding and joint heat treatment process for pearlite rails containing Cr, Nb, and RE, including: a flash welding process and a joint heat treatment process. After using the flash welding joint process and the joint heat treatment process of the present invention, it can be ensured that the pearlite rail joints containing Cr, Nb, and RE are all normal pearlite structures, without abnormal structures such as bainite and martensite; the present invention solves the problems of low hardness of high-strength and high-hardness rail joints, poor joint drop hammer performance, and low joint collapse, and can effectively improve the performance matching between rail joints and parent materials, improve the comprehensive mechanical properties and contact fatigue performance of joints, thereby effectively improving the service performance of joints.

A joint heat dissipation device and a collaborative robot, a partition of the joint heat dissipation device and a cooling fan, wherein the partition is installed in the channel between the first joint and the first arm of the collaborative robot, the partition divides the channel into an air outlet and an air inlet, a circulating air duct is formed between the first joint and the first arm, and the cooling fan is used to blow the air in the first joint into the first arm. Since a partition is installed in the channel between the first joint and the first arm to divide the channel into an air outlet and an air inlet, and a cooling fan is installed at one end or inside of the air outlet, a circulating air duct is formed between the first joint and the first arm, and the circulating air duct can transfer the heat in the first joint to the first arm, and the arm surface of the first arm becomes a heat dissipation surface, which expands the heat dissipation area and has a better heat dissipation effect, so that the collaborative robot does not need to reduce the load and speed, and can also avoid the influence of excessive temperature in the first joint on the driving mechanism.

The invention discloses a bainite steel rail welding joint production method free of joint heat treatment, and belongs to the technical field of steel rail welding, and the bainite steel rail welding production process comprises the steps of rust removal, welding, rough milling, aging treatment, straightening, accurate grinding, finished product inspection and flaw detection. Based on the components, the structure and the cooling characteristics of the bainite steel rail, on the premise that the strength, the hardness and the toughness of a connector are guaranteed, the structure transformation characteristics of the bainite steel rail are combined, and compared with a traditional steel rail welding production process, the normalizing heat treatment process step is omitted, the production process is shortened, and the energy consumption and the production cost are reduced.

The utility model provides a steam pipeline connector heat preservation device which comprises two sets of semicircular pipe sleeves, one set of semicircular pipe sleeves comprises two semicircular pipes and a special bolt, pipeline flanges are connected through the special bolt and a nut, a conventional screw rod is arranged on one side of the two sides of the head of the special bolt, and a connecting rod is arranged on the other side of the head of the special bolt. The end of the conventional screw is not provided with threads, the diameter of the conventional screw is the same as that of the connecting rod, a fixing hole is formed in one end of the semicircular pipe, and the fixing hole is connected with the conventional screw or the connecting rod when the semicircular pipe wraps the pipeline. According to the steam pipeline connector heat preservation device, the pipeline is sleeved with the spliced and combined semicircular pipe sleeve, meanwhile, the semicircular pipe sleeve is limited through the fixing bolts on the flanges, the semicircular pipe sleeve is limited and fixed, efficient heat insulation cotton is laid between the semicircular pipe sleeve and the pipeline, and the heat preservation performance is improved; and when the semi-circular pipe needs to be replaced, the semi-circular pipe is also very convenient to disassemble and assemble.

The utility model discloses an assembly type building prefabricated outer wall joint heat preservation structure which comprises two wall bodies, a heat preservation plate is arranged between the two wall bodies, installation grooves are formed in the left side and the right side of the heat preservation plate, installation blocks are fixedly connected to the outer sides of the wall bodies, heat preservation units are arranged on the outer sides of the heat preservation plate, and the installation blocks are fixedly connected to the outer sides of the wall bodies. A fastening groove is formed in the outer side of the wall body, the heat preservation unit comprises a fixing plate, the fixing plate is arranged on the front side of a heat preservation plate, air bags are fixedly connected to the left side and the right side of the fixing plate, and inflation cavities are formed in the inner sides of the fixing plate and the air bags. By arranging the wall bodies, the heat preservation plate, the fixing plate, the inflation cavity, the filling cavity, the filler, the inflation pipe, the rectangular hole and the blocking block, inflation can be conveniently conducted on the inflation cavity, the connection stability of the two wall bodies can be conveniently improved, the heat preservation performance of a joint is improved through the filler on the front side and the rear side, and gas is prevented from being affected by the outside world.

The utility model relates to the technical field of welded joints, and discloses welded joint heat treatment equipment which comprises a heat treatment box, the heat treatment box comprises a fixed box and a cooling box, the fixed box is integrally connected to the end of the cooling box, sliding wheels are installed at the bottom of the cooling box, a containing groove is formed in the bottom of the fixed box, and a transmission mechanism is arranged on the side wall of the fixed box. An iron sheet is arranged at the bottom of the cooling box, a transmission mechanism is matched with a containing groove, after a connector is welded, the welded connector is placed in a clamping ring in the containing groove, the welded connector can be safely and stably fixed, moving or sliding is avoided, it is ensured that the position of the welded connector is accurate, and then handles on the two sides are rotated, and a first rotating shaft drives a gear to rotate; the gear is in meshing transmission with teeth on the sliding plate, so that the sliding plate completes upward moving or downward moving operation, the sliding plate is fixedly connected with the containing groove, meanwhile, the containing groove conducts upward moving taking or downward moving cooling motion trail, and therefore it can be guaranteed that the cooling process is uniform and stable.

The invention discloses a welding crack propagation multi-scale simulation method based on cohesion-crystal plasticity. The method specifically comprises the following steps: aiming at the limitation that parameters of a traditional cohesion model depend on macroscopic inversion, adopting molecular dynamics simulation to obtain a traction force-separation displacement relationship reflecting a microscopic damage mechanism of a crack tip, and obtaining initial parameters of the cohesion model; aiming at the problem that an idealized homogeneous model cannot reflect the influence of a microstructure of a heat affected zone of a welding joint, a method based on electron back scattering diffraction experiment reconstruction is adopted, a finite element model capable of accurately reflecting actual grain morphology and grain boundary distribution characteristics is established, and a cohesion model unit is embedded into a grain boundary. A cohesion model and a crystal plastic constitutive model are coupled, a complete cross-scale calculation framework is constructed, simulation of the whole process of a welding joint heat affected zone from microscopic damage initiation and evolution to crack propagation is achieved, and a cross-scale correlation mechanism of a welding joint crack propagation behavior is clarified.

The utility model discloses a heat preservation waterproof sealing structure for a heat supply pipeline joint, and belongs to the technical field of pipeline construction. A joint high-density polyurethane thermal insulation layer is wrapped at a joint welding seam of a working steel pipe, an electric hot melting sleeve is wrapped outside the joint high-density polyurethane thermal insulation layer, and two ends of the electric hot melting sleeve are overlapped and covered on high-density polyethylene outer sheaths on two sides of the joint high-density polyurethane thermal insulation layer. The utility model is creatively improved aiming at the traditional heat supply pipeline joint heat preservation construction technology, particularly effectively improves the integral heat preservation waterproof sealing effect at the welding seam of the pipeline joint, improves the construction quality, ensures the one-time acceptance qualification rate, and meets the design and specification requirements. The device is scientific in design, reasonable in structure, convenient to operate and safe and convenient to construct, the construction difficulty is reduced to a great extent, the construction progress is accelerated, and the consumption of manpower, time, materials and the like is effectively reduced, so that the purposes of saving cost and reasonably utilizing resources are achieved.

The application discloses a kind of for hydrogenation reactor bevel pipe heat treatment device, the hydrogenation reactor includes cylinder, the bevel pipe is connected to the cylinder, the device includes: cable placer, is arranged around the bevel pipe, for arranging cable;Cable, is movably arranged on the cable placer;Heat insulation layer, is laid between the hydrogenation reactor and the cable placer;Electric cable take-up machine, is connected to the cable, for tightening or releasing the cable.The design and calculation method of inductive heating power supply and inductor includes the design and calculation of inductive heating power supply parameters, inductive cable turns and the arrangement cable method according to the heating process and size condition of bevel pipe and cylinder.The design and calculation of inductive heating power supply and inductor, accurate arrangement power supply and inductive device, avoid the problem that traditional direct laying inductive cable needs repeated operation, improve work efficiency, and simultaneously can realize the sensitive regulation and control of inductive heating temperature.

The utility model relates to the technical field of pipeline joint heat preservation, and discloses a heat supply pipeline joint double-clip type heat preservation device which comprises four outer covers, containing grooves are formed in the inner walls of the outer covers, two splicing rings are connected to the inner walls of the containing grooves in a sliding mode, clamping strips are fixedly connected to the outer portions of the splicing rings, and the clamping strips are connected with the outer walls of the outer covers in a sliding mode. Clamping grooves are formed in the splicing rings, the outer portions of the clamping strips are slidably connected to the inner walls of the clamping grooves, the outer portions of the outer covers are fixedly connected with auxiliary assemblies used for assisting in rotary connection, the other ends of the auxiliary assemblies are fixedly connected to the outer portion of the other outer cover, and the outer portions of the outer covers are fixedly connected with connecting plates. According to the thermal insulation structure, the positions of the dismounting plate and the splicing ring are fixed by rotating the mounting screw rod, then one of the outer covers is rotated to drive the rotating block to rotate, so that the rotating shaft rotates, the two connecting plates can be aligned, and then the bolt and the nut are rotated to be fixed, so that the thermal insulation structure is mounted.

The invention provides a double-beam laser and multi-stage indirect arc combined heat source efficient welding method, the combined heat source comprises a common single laser beam, a multi-stage indirect arc and a scanning laser beam which are arranged in sequence, and the welding method comprises the following steps that before welding, a groove with a certain angle and a penetrating gap is formed in a super-large thick-wall component; the groove of the component is sequentially divided into a truncated edge penetrating area and a filling and covering area from bottom to top in the thickness direction. During welding, one-time welding double-face forming of the ultra-large thick-wall component is achieved through the synergistic effect of multiple heat sources; wherein the common single laser beam is used for completely penetrating through the truncated edge penetrating area for penetrating welding; the multi-stage indirect arc is used for performing graded filling on the filling coverage area; and the scanning laser beam is used for fully stirring the molten pool in the filling and covering area, so that molten pool metal and the side wall of the groove are completely fused, and good surface forming is obtained. The technical problem of single-pass high-quality welding bottleneck of the ultra-large thick-wall component with the thickness being 30 mm or above is solved.

The utility model relates to the technical field of building heat preservation structures, in particular to a high-stability assembly type prefabricated outer wall joint heat preservation structure which comprises a prefabricated wall body, first installation grooves are formed in the front side and the rear side of the end face of the prefabricated wall body, and the prefabricated wall body is provided with first hinges through the first installation grooves. A movable frame is mounted at the other end of the first hinge, through holes are formed in the front side and the rear side of the movable frame, the movable frame is connected with first screws through the through holes, a placement frame is mounted on the left side wall of the prefabricated wall body, and a rock wool board is slidably connected to the inner wall of the placement frame; by arranging the placing frame, the second screw and the like, the problems that an existing heat preservation mode of an outer wall and an outer wall joint is usually pasting heat preservation materials, and the heat preservation materials can fall off due to the fact that the heat preservation materials of the outer wall are greatly influenced by the outside are solved, the heat preservation materials are installed more firmly, and therefore the installation stability of the heat preservation materials is improved.

The invention discloses a low-alloy U75VH heat treatment steel rail flash welding joint heat treatment method which comprises the following steps: a heating process: normalizing a joint by using double-frequency normalizing induction heating equipment, firstly performing low-frequency induction heating: heating the welded joint from room temperature to 830-850 DEG C under the conditions that the low-frequency frequency is 1000-1400Hz, the low-frequency power is 70-90kW and the heating time is 60-90s; after heating to the temperature, low-frequency heating is adjusted to high-frequency induction heating, the heating frequency ranges from 2000 Hz to 2300 Hz, the high-frequency power ranges from 50 kW to 70 kW, the heating time ranges from 50 s to 90 s, the connector is heated to 890 DEG C to 910 DEG C from 830 DEG C to 850 DEG C, and the total heating time is controlled to range from 110 s to 180 s; the method further comprises a cooling process. According to the heat treatment method for the joint, the mechanical property and the microscopic structure of the low-cost and low-alloy U75VH heat treatment steel rail joint produced by welding can meet the standard requirements.

The utility model belongs to the technical field of building construction, and discloses a steel bar joint heat treatment device. The steel bar joint heat treatment device comprises a heating furnace body, a heating coil and a fixing assembly, the heating furnace body is provided with a heating inner cavity, the heating inner cavity is used for containing a joint area of a steel bar, and a through hole for the steel bar to penetrate through is formed in the heating furnace body; the heating coil is arranged in the heating inner cavity, and the heating coil is used for heating a joint area located in the heating inner cavity; the fixing assembly comprises an upper pressing block and a lower pressing block, the upper pressing block and the lower pressing block are both connected to the heating furnace body, and when the reinforcing steel bar penetrates through the heating furnace body, the upper pressing block and the lower pressing block can oppositely abut against the portion, stretching out of the heating inner cavity, of the reinforcing steel bar. The reinforcing steel bar joint heat treatment device can heat a joint area of a reinforcing steel bar at different placement angles and different placement directions, is suitable for various construction scenes, and is high in practicability and high in heat treatment efficiency.

The invention discloses a pipeline three-way heat preservation layer linear cutting machining device and a using method thereof.The pipeline three-way heat preservation layer linear cutting machining device comprises a bearing base mechanism, a positioning clamping mechanism is arranged on the bearing base mechanism, and a frame moving mechanism is arranged on the bearing base mechanism; the positioning and clamping mechanism is arranged on the bearing base mechanism, the frame moving mechanism is arranged on the bearing base mechanism and is adjusted and moved according to the cutting position of the polyurethane thermal insulation pipe shell, the wire cutting mechanism is arranged on the frame moving mechanism, and the wire adjusting mechanism is arranged on the wire cutting mechanism. A series of operations of clamping and fixing, cutting position adjusting, cutting line adjusting and linear cutting of the polyurethane heat preservation pipe shell are achieved, accurate circular linear cutting is conducted on the polyurethane heat preservation pipe shell through the cutting line, the cut cross section is neater and higher in fitting degree, the cutting accuracy of a pipeline tee joint heat preservation layer is improved, and the production efficiency is improved. And the heat preservation effect of the polyurethane heat preservation pipe shell at the pipeline tee joint is greatly improved.

A kind of be applicable to double joint, three joint heat treatment water jacket water spraying structure device, including upper water jacket and lower water jacket, upper water jacket is located above lower water jacket;Upper water jacket includes upper template and several lower templates, and several lower templates are fixedly installed in the lower end of upper template, and the gap for placing hanging joint is left between several lower templates, and the facade of lower template towards gap is provided with several side drainage holes, and the lower surface of upper template is provided with several top drainage holes;Lower water jacket includes lower die box, and the inner surface of lower die box is provided with several lower water spraying holes, and the lower part of lower die box is provided with flow groove;The overall cooling effect of casting or forge piece is uniform, and the hardness uniformity of its surface is good;Avoid because of uneven water spraying creates product cooling effect uneven, finally leads to product hardness unqualified;The device well guarantees quenching layer depth and the mechanical property of material.

A building deformation joint heat preservation and waterproof structure comprises a first building body and a second building body, a deformation joint is arranged between the first building body and the second building body, and the building deformation joint heat preservation and waterproof structure is characterized in that a corrugated steel plate is arranged in the deformation joint, one side of the corrugated steel plate is fixed to the first building body, and the other side of the corrugated steel plate is fixed to the second building body; a heat preservation core material is arranged on the outer side of the corrugated steel plate and located in the deformation joint, a steel wire mesh concrete base layer is arranged on the outer side of the heat preservation core material and located in the deformation joint, one or more waterproof layers are arranged on the outer side of the steel wire mesh concrete base layer, leveling mortar layers are arranged on the outer sides of the waterproof layers, and anti-crack mortar layers are arranged on the outer sides of the leveling mortar layers. The structure is reasonable, the corrugated steel plates capable of being folded and stretched can well adapt to stretching and retracting of the deformation joint, the hollow heat preservation core material can well adapt to compression and stretching and can preserve heat, and the steel wire mesh concrete base layer, the waterproof layer, the leveling mortar layer and the anti-crack mortar layer can beautify the appearance and can resist cracks and water.