89results about How to "Avoid fragile" patented technology

The invention relates to a switch structure of a quick circuit breaker. The switch structure comprises an arc extinguish chamber and a driving mechanism, the driving mechanism comprises a main pull rod, a linkage sleeve and a crank linkage rod, the main pull rod is vertically arranged, and the top of the main pull rod is connected with the moving contact; the linkage sleeve is arranged on the main pull rod in a sleeving mode and can synchronously move up and down along with the main pull rod, and the linkage sleeve is of an I-shaped structure and comprises a straight cylinder part and end plate parts located at the two ends of the straight cylinder part; the crank linkage rod is perpendicular to the main pull rod, a crank arm I of the crank linkage rod is in sliding fit with the outer wall of the straight cylinder part, and a crank arm II of the crank linkage rod is matched with the closing buffer part and the opening buffer part respectively; in a switching-on state, the end part of the crank arm I is positioned at the lower end of the straight cylinder part; and in an opening state, the end part of the crank arm I is positioned at the upper end of the straight cylinder part. According to the invention, the motion quality of the single-phase mechanical switch at the early stage of opening and closing actions can be reduced, so that the opening and closing speed of the circuit breaker is effectively improved, and the purpose of quickly switching on and off current is achieved.

The invention discloses an automotive liquid ammonia supply system which comprises a liquid ammonia storage tank, a liquid outlet and a gas outlet are formed in the liquid ammonia storage tank, the liquid outlet is connected with one end of a filling pipeline and one end of a liquid outlet pipeline, a stop valve and an electromagnetic valve are connected to the liquid outlet pipeline in series, the other end of the liquid outlet pipeline is connected with a first medium inlet of a water bath type vaporizer, and a second medium inlet of the water bath type vaporizer is connected with a second medium inlet of the water bath type vaporizer. A first medium outlet of the water bath type vaporizer is connected with an inlet of the buffer tank, an outlet of the buffer tank is used for providing ammonia gas, one end of the gas return pipeline is connected with the gas outlet, a pressure gauge, a stop valve and a safety valve are connected to the gas return pipeline in series, and a second medium inlet and a second medium outlet of the water bath type vaporizer are used for being connected with an engine cooling liquid outlet and an engine cooling liquid inlet respectively. And a saturation pressurization pipeline is further arranged, an electromagnetic valve and a heat exchange pipe located in the liquid ammonia storage tank are connected to the saturation pressurization pipeline in series, and two ports of the saturation pressurization pipeline are used for being connected with an engine cooling liquid inlet and an engine cooling liquid outlet respectively. The liquid ammonia gas supply system for the vehicle can stably supply gas to the vehicle.

The invention relates to the field of sintering jigs and discloses a metal powder injection molding sintering jig, comprising a base plate, a telescopic mechanism fixedly connected to the left side of the upper surface of the base plate, a movable plate fixedly connected to the right side of the telescopic mechanism, a mold plate disassembled and installed on the right side of the movable plate by bolts, the upper surface of the base plate located on the right side of the mold plate is fixedly connected to a mold forming mechanism, a feeding mechanism is fixedly connected to the top of the mold forming mechanism, the upper surface of the base plate located on the right side of the mold forming mechanism is fixedly connected to a circulating cooling mechanism, and a groove is provided at the lower right side of the mold plate; by starting the telescopic mechanism on the base plate, the movable plate and the mold plate are pushed to move, and can be moved toward the mold forming mechanism to close, or away from the mold forming mechanism to open, molding raw materials are fed into the mold forming mechanism through the feeding mechanism, and demoulding cooling is achieved through the circulating cooling mechanism.

The invention relates to the technical field of agricultural mechanization, and discloses a variable-variable and variable-width fertilizer spreader, which comprises: a cabinet, the bottom of which is provided with a crawler belt for moving the device; the collecting mechanism is mounted in the cabinet and used for releasing and collecting the rope for moving; the fixing mechanisms are mounted on the two sides of the cabinet and used for fixing the position of the cabinet; the fertilizer spreading mechanism is mounted on one side of the cabinet and is used for spreading a fertilizer; the stirring mechanism is mounted in the fertilizer spreading mechanism and is used for mixing the fertilizer; the bundling mechanism comprises a rope winding disc, and the rope winding disc rotates in the machine cabinet. The moving path and stability of the equipment are controlled through the rope conveying mechanism, the phenomenon of uneven fertilization caused by equipment displacement is avoided, the system design not only protects the soil structure, but also provides a good growth environment for crops, promotes development of root systems and effective absorption of nutrients, and finally facilitates improvement of the yield and quality of the crops.

The invention belongs to the technical field of permanent magnet production, particularly relates to the field of small-size neodymium iron boron permanent magnet production, and particularly relates to a high-performance thermal deformation permanent magnet and a preparation method. The magnet with the small overall dimension is manufactured in a powder extrusion mode, and the cross sectional area of the magnet can be as small as 25 mm < 2 >; one-time forming is achieved in a hot extrusion mode, the overall production process is short, and the problem that a thin and long mandrel forming an inner hole in an existing scheme is prone to damage is solved. The magnet produced by the invention has higher performance, and the magnetic field intensity of the circumferential surface is uniformly distributed after multi-pole magnetization. The number of poles reaches up to more than 20, the anisotropic field of the neodymium-iron-boron magnet at a higher temperature is reduced by heating during magnetizing, and higher magnetizing body performance can be obtained more easily under the condition that the magnetizing magnetic field intensity is limited due to the size. According to the technical scheme, in the structure of the prepared radial magnetic field magnet, the inter-pole difference does not exceed 10%, and the residual magnetism of the magnet is not lower than 10 kGs.

The present invention relates to a precise control structure of an internal air intake system of an air cooling system of an air compressor, comprising an internal air intake structure, an internal cooling channel of the air compressor and an air outlet structure; the internal air intake structure comprises an air intake hole axially penetrating a thrust bearing seat of the air compressor, a first-level bearing seat air distribution groove, a gas flow control valve, a temperature sensor and a controller; the air intake hole is a trumpet hole; the internal cooling channel of the air compressor comprises a first channel of the first-level bearing seat, a first cooling groove of the thrust bearing, a second cooling groove of the thrust bearing, a first-level sealing disk air distribution groove, a second channel of the first-level bearing seat, an internal space of the motor, first and second-level connecting air ducts, a second-level bearing seat channel and a second-level sealing disk cooling groove; the beneficial effects of the present invention are: the designed air intake hole and controller can receive signals from the air outlet solenoid valve, the pressure sensor, the gas flow control valve and the temperature sensor to ensure that the gas can cool various internal parts of the air compressor; and no compressed air is wasted.

The utility model relates to the technical field of denitration catalyst cutting, in particular to a denitration catalyst positioning and cutting device which comprises a conveying frame, a material receiving belt and a material conveying belt are installed at the front end and the rear end of the conveying frame respectively, and an adjusting frame and an auxiliary frame are fixedly connected to the position, located at the joint of the material receiving belt and the material conveying belt, of the top of the conveying frame respectively. First positioning plates are installed at the left end and the right end of the inner side of the adjusting frame correspondingly, second positioning plates are installed at the left end and the right end of the inner side of the auxiliary frame correspondingly, and a cutting frame is fixedly connected to the position, located at the connecting positions of the first positioning plates and the second positioning plates, of the top of the conveying frame. A dust hood is installed at the bottom of the conveying frame and located at the connecting position of the material receiving belt and the material conveying belt, supporting legs are fixedly connected to the four corners of the bottom of the conveying frame, and compared with an existing denitration catalyst cutting device, the denitration catalyst positioning and cutting device can improve the cutting quality through the design.

An atomizing core includes a shell with a receiving cavity extending from top to bottom, a porous body wrapped in the receiving cavity of the shell, and a heating element arranged on the bottom surface of the porous body, the porous body includes a first surface in contact with atomized liquid and a second surface opposite to the first surface, the first surface is a liquid absorption surface, the second surface is an atomization surface, the heating element is arranged on the atomization surface, the atomized liquid penetrates from the liquid absorption surface to the atomization surface, the heating element on the atomization surface is heated, and the heat is conducted to the porous body to atomize the atomized liquid. The present application also includes a cigarette cartridge.

The utility model relates to a heat supply unit automatic exhaust equipment technical field, specifically speaking is a kind of heat supply unit primary network supplement secondary network automatic exhaust device, including jar body, the water inlet pipe and water outlet pipe for supplementing water are provided in the jar body periphery;Water source after the turbulence of the type plate will enter conical pipe, the spiral groove of conical pipe inner periphery is convenient to the water source and makes water source form spiral force pass through conical pipe and enter the bottom side of jar body, simultaneously, small particle solid and float carried in water source can be thrown to the inner wall on the bottom side of jar body under the centrifugal force generated by spiral conveying, and it is convenient to settle in jar body bottom, and the conical pipe of conical structure is convenient to the interception of small particle solid and float, and the vertical pipe of ring seat inner periphery in the bottom of conical pipe can be convenient to the water source of reflux and spiral conveying and shunt, to further reduce the condition that small particle solid and float are moved by water source and move accordingly.

The utility model belongs to the technical field of handbag, concretely relates to adjustable shoulder strap formula handbag, including the bag body, the bag body and the shoulder strap of extending setting along the bag body height direction, the bag body is formed with the gap between the inside and outside two layers, the inside and outside layer between the inside layer and the outside layer form gap, the shoulder strap is circular and surrounds the bag body setting, and the shoulder strap and the bag body coincide portion set in the gap between the inside and outside layer of the bag body length direction both sides, the shoulder strap lower extreme is located in the gap between the inside and outside layer of the bag body bottom surface, the shoulder strap can slide in the gap, the bag body is provided with the both sides of the shoulder strap and is equipped with the adjusting hole, the bag body is equipped with the both sides of the shoulder strap and is equipped with the limiting device still in the upper end, and the limiting device and the shoulder strap correspond to set, and the limiting device will be opposite fixed with the bag body with the shoulder strap. Through the above-mentioned component's setting, not only makes the handbag neatness high, but also can adjust length range to be bigger, improves the bearing capacity and the service life of handbag simultaneously.

The utility model relates to the technical field of polishing equipment, and discloses decoration wall surface polishing equipment which comprises a polishing device body, a holding handle is fixed to the outer side of the polishing device body, a polishing disc is installed at the bottom of the polishing device body in a matched mode, and one end of the polishing device body is connected with a power line. A wiring protection device is installed at the end, close to the power line, of the grinding device body. The device is provided with a wiring protection device, rubber reinforcing sleeves on the inner walls of a fixed carbon steel sleeve and a movable carbon steel sleeve are attached to the outer side of a power line, the problem that the wiring portion of the power line is prone to damage can be avoided, the service life of the device is prolonged, and polishing of the decoration wall is facilitated; the device is provided with the maintenance lockhole shielding device, the lockhole is protected through the lockhole cover plate, unlocking of the lockhole cover plate can be conveniently completed, then unlocking can be conducted, the two protective shells are divided, and use is easy and convenient.

The present application discloses an electronic device, a camera and a control method of the camera, the disclosed camera comprising a housing (100), a sensor (200), and a reflector (300) and a photosensitive chip (400) arranged in the housing (100), the housing (100) being provided with a light inlet hole (110), the sensor (200) being used for detecting the actual light intensity of light entering the light inlet hole (110); when the actual light intensity is greater than or equal to a first light intensity threshold value, the reflector (300) is used for reflecting the light to the outside of the photosensitive chip (400); when the actual light intensity is less than a first light intensity threshold, the reflector (300) is configured to reflect at least part of the light onto the photosensitive chip (400). According to the scheme, the problem that a camera related to the related technology is easy to damage during shooting in a scene with relatively high light intensity can be solved.

The utility model discloses a weak current engineering detector, which relates to the field of weak current engineering and comprises a protective shell, a cavity is arranged on the surface of one side of the protective shell, sensing plugs are fixedly mounted on the upper surface and the lower surface of the protective shell, a detection instrument is movably connected to the inner side wall of the cavity, and a display lamp is arranged on one side of the upper surface of the detection instrument. The side, away from the display lamp, of the detection instrument is connected with an inserting assembly in a penetrating mode, an elastic protruding part is shrunk inwards, an elastic clamping block on a locking rib clamping groove is compressed by the protruding part to deform, accordingly, the locking rib is driven to deform, and meanwhile, in order to keep stable elastic deformation of the locking rib, the locking rib is prevented from being damaged. The internal thread and the external thread of the locking cover are in threaded connection, so that the hollow structure in the locking cover can limit the locking rib, the testing network cable is fixed by the locking rib to keep stable connection, and the problem that part of joints are easy to damage due to loosening caused by external pulling is avoided.

The utility model relates to the field of outside rear-view mirror support processing, and discloses an electronic outside rear-view mirror support structure with a z-plane axis rotation function, which comprises a shell, a camera is fixedly connected to the left side of the shell, a first connecting piece is fixedly connected to the bottom of the right side of the shell, and a second connecting piece is arranged at the bottom of the first connecting piece. A first motor is fixedly connected to the bottom of the inner wall of the second connecting piece, a second connecting rod is fixedly connected to the output end of the first motor, a first gear is fixedly connected to the top of the second connecting rod, and the second connecting rod is arranged on the left side of the first gear. According to the utility model, the first connecting piece is arranged at the bottom of the shell, the assembly box is arranged in the first connecting piece, and the plurality of springs are arranged between the assembly box and the bottom plate, so that when a vehicle runs and the shell vibrates due to bumping, the stress is weakened by the plurality of springs; and the problem that the electronic outside rear-view mirror is easy to damage due to bumping in the running process of the vehicle is solved.

The utility model relates to the technical field of USB connectors, and discloses a magnetic plug-in USB connector female head, which comprises a shell, a USB plug is arranged on the left side of the shell, and a transmission line is arranged on the right side of the shell. The right side of the shell is fixedly connected with a mounting sleeve, the transmission line is located in the mounting sleeve, the outer side of the mounting sleeve is in threaded connection with an extension sleeve, the interior of the extension sleeve is fixedly connected with an outer rod sleeve, a sliding rod is inserted into the side, away from the extension sleeve, of the outer rod sleeve, and a spring is arranged in the outer rod sleeve. The side, away from the outer rod sleeve, of the sliding rod is fixedly connected with an annular sleeve, and the right side of the extending sleeve is fixedly connected with a protective sleeve. According to the magnetic plug-in USB connector female head, when the transmission line is bent in use, the bending condition of the transmission line is reduced under the action of the spring, the protection sleeve provides protection for the transmission line, and the protection sleeve and the annular sleeve are made of flexible or rubber materials, so that better protection and flexibility can be provided.

The utility model provides a woven hose connecting structure of a spinning metering pump, which comprises a pump plate connected with the spinning metering pump, the pump plate is sequentially provided with a plurality of steps from the center to the outside, the heights of the steps are reduced step by step from the center of the pump plate to the outside, each step is connected with a plurality of joints, and the joints are connected with the pump plate. The lengths of the connectors located on the same step are equal, and from the center of the pump plate to the outside, the lengths of the connectors are shortened along with step-by-step reduction of the height of the steps. The multiple steps are arranged on the pump plate, and the joints with different lengths are arranged on the different steps, so that the joints on the different steps are farther away from the connection position of the braided hose from the center of the pump plate to the outside. When the braided hose on the inner side is exploded and needs to be replaced, the problem that the braided hose on the outer side is damaged easily due to the fact that the joint gap between the two different steps is larger can be solved.

The utility model relates to a rounded corner distribution box, the rounded corner distribution box comprises a rounded corner box body and a panel, the four corners of the rounded corner box body are rounded corner structures, the panel is installed on the rounded corner box body, and the four corners of the panel are rounded corner structures matched with the four corners of the rounded corner box body; a decorative picture is printed on the panel, and a display screen and a control switch are arranged on the panel. The round corner structure enables the box body to be firmer and more attractive, and meanwhile the problem that a rectangular or square box body is prone to being damaged in the transportation and installation process is solved. Through the decoration of the printed decorative picture, the long-term aesthetic property of the distribution box is further improved; and through the structural arrangement on the panel, the practicability and convenience of equipment use are improved.

The utility model discloses an anti-creeping multilayer printed circuit board structure for an electric cooker, which comprises a sealing layer, insulating layers and a wiring layer, the insulating layers are arranged in the sealing layer, a first conducting layer is arranged below the first group of insulating layers on the upper side in the sealing layer, a voltage sensor is arranged on one side of the first conducting layer, and a second conducting layer is arranged on the other side of the first conducting layer. One side of the voltage sensor is connected with an interface, the lower part of the first conductive layer is connected with a wiring layer through a pipeline, the bottom of the wiring layer is provided with a heat dissipation copper pipe, the lower part of the wiring layer is connected with a second conductive layer through a pipeline, one side of the second conductive layer is connected with a plurality of groups of grounding piles, and the grounding piles are connected with a power supply. The multiple groups of grounding piles are uniformly arranged along the horizontal direction of the second conductive layer, the waterproof material is adopted to seal the edge, so that the moisture resistance of the circuit board is improved, the voltage sensor is arranged on the conductive layer connected with the electric cooker to prevent the circuit board from being damaged by electric leakage, and the use safety is improved.

This invention discloses a GIS-based land spatial planning and design surveying device, including a fixed platform. A storage slot is formed on the upper side wall of the fixed platform, and a horizontal plate is fixedly connected within the storage slot. An electric telescopic rod is fixedly connected to the upper side wall of the horizontal plate. The drive end of the electric telescopic rod is vertically upward and fixedly connected to a fixing block. A surveying instrument is mounted on the upper side wall of the fixing block. Two sealing plates are slidably disposed on the upper end of the fixed platform, and a linkage mechanism is provided between the opposing side walls of the two sealing plates and the electric telescopic rod. When not in use, this invention automatically protects the surveying instrument through the two sealing plates, solving the problem of easy damage in cluttered environments. It also allows for adjustment of the angle of the drawing board, facilitating drawing operations on the drawing board for users.

The invention belongs to the technical field of washing machines, and discloses an impeller and an inner barrel assembly, the impeller comprises a central mounting part and a plurality of stirring paddles radiating from the mounting part to the periphery; the mounting part is of a columnar structure; the stirring paddle has a certain height in the axial direction of the columnar structure and is of a closed structure with a cavity inside. The inner barrel assembly comprises an inner barrel and the impeller. According to the invention, the projection of the impeller towards the bottom of the inner barrel is no longer circular, the area of dirt easily hidden between the bottom of the impeller and the bottom of the inner barrel is reduced, and meanwhile, the stirring paddle adopts a closed structure with a cavity, so that the use requirement that the impeller protrudes out of the bottom of the inner barrel and can stir water flow is met, and the problem that dirt is possibly accumulated in the impeller is avoided; the trouble that dirt is easily accumulated below the impeller and is difficult to clean is solved.

The utility model discloses an LED automobile headlamp which comprises a shell, a lamp panel arranged at one end in the shell, a cooling fan arranged at the other end in the shell, a plurality of LED chips arranged on the two sides of the lamp panel, a temperature controller arranged on one side of the lamp panel, a cooling rod arranged under the lamp panel, and a radiator connected with one end of the cooling rod. The radiator is arranged on one side of the cooling fan and comprises a cylindrical circuit board located in the center and a plurality of cooling fins surrounding the periphery of the cylindrical circuit board, heat generated by light emitting of the LED chips can be conducted easily, the cooling efficiency is improved, and the service life of the LED chips is prolonged. And meanwhile, the cylindrical circuit board is electrically connected with the LED chip and the temperature controller through the lamp panel made of a copper-based material, and a power supply connecting port is formed in the bottom of the cylindrical circuit board, so that when the temperature controller detects that the temperature of the lamp body protection shell is too high, the LED chip is automatically disconnected from a power supply, and therefore, the LED chip is protected, and the service life of the LED chip is prolonged.

The utility model provides a torque connector and an uncapping machine with the torque connector, the torque connector comprises a rotating rod, the rotating rod comprises a first rod body and a second rod body which are rotatably connected, and the first end of the first rod body can be connected with a driving part; the first end of the spring sleeves the second end of the first rod body, the second end of the spring sleeves the first end of the second rod body, and the first rod body and the second rod body are both in interference fit with the spring; and the uncovering structure is arranged at the second end of the second rod body. According to the technical scheme provided by the invention, the problems that the uncovering efficiency is low due to the fact that an operator performs uncovering operation on a plurality of cryopreservation tubes manually, and the joint of the tube body and the tube cap is easy to damage due to large torsion during uncovering operation in the prior art can be solved.

The utility model relates to the technical field of hot runner injection molds, in particular to a color changing structure, a hot runner nozzle and a hot runner system.The color changing structure is characterized in that an annular end cover annularly sleeves the periphery of a valve needle and is located in a gap between the outer end face of a flow guide shuttle and the inner wall of a mold open frame cavity; the sleeve part and the annular end cover are integrally formed, and the sleeve part is arranged on the periphery of the flow guide shuttle extending part in a sleeving mode. The annular end cover and the sleeve part are formed by solidifying molten plastic; according to the color changing structure formed by solidifying the molten plastic, an existing color changing cap is removed, the problems that the color changing cap is prone to damage and needs to be replaced frequently are solved, the product quality is greatly improved, and the production cost is reduced.

The utility model discloses an electric lunch box with a detachable heating base, and relates to the field of lunch boxes. The electric lunch box comprises an electric heating seat, a lunch box main body is arranged at the top of the electric heating seat, and a sealing cover is mounted at the top of the lunch box main body; the food-grade stainless steel container comprises an outer shell, a steam circulation hole, a food-grade stainless steel container and a sealing rubber plug. According to the electric lunch box, the heating base can be directly placed in a place needing to be used and is not carried along with the lunch box body, the lunch box body is sealed through the sealing rubber plug in the carrying process, during heating, the food-grade stainless steel container is lifted, then the connecting plate is taken down, and the sealing rubber plug is moved out of the interior of the steam circulating hole; then the lunch box main body is placed on the electric heating seat to be heated, so that steam is discharged upwards through the steam circulating hole and the communicating hole to heat food in the food-grade stainless steel container, and the problem that the electric heating seat is easy to damage when being carried along with the lunch box main body is avoided.

The utility model relates to a leisure chair convenient to disassemble and assemble. Belongs to the technical field of furniture. The chair comprises a chair seat and at least three chair legs, wherein the chair legs are independently connected to different positions of the chair seat from respective directions; at least one group of chair leg connecting assembly is arranged between any two adjacent chair legs; the chair leg connecting assembly comprises a first connecting piece and a second connecting piece which are arranged in pairs, the first connecting piece is provided with a first supporting part used for fixing the second connecting piece, and the second connecting piece is provided with a second supporting part used for fixing the first connecting piece. According to the utility model, the chair leg connecting assemblies are arranged between the adjacent chair legs, so that the chair legs can support each other to form a whole, when a single chair leg is additionally stressed, the additional force can be dispersed between the chair legs through the chair leg connecting assemblies, and the problem that the chair legs are easy to break due to the fact that the stress of the single chair leg is suddenly increased is avoided; the device has the advantages of being good in integrity and high in stability.

The utility model discloses a white spirit fermentation tank with a movable protective structure, which comprises a fixedly mounted protective bottom plate, hydraulic machines are arranged on the lower sides of the front end and the rear end of the fixedly mounted protective bottom plate, movable telescopic rods are arranged at the left end and the right end of each hydraulic machine, and movable supporting blocks are arranged at the outer ends of the movable telescopic rods. A ceramic brake pad is arranged at the outer end of the movable supporting block; the fermentation box body is arranged above the fixedly-mounted protective bottom plate, a first adjusting bolt is arranged at the joint of the fermentation box body and the fixedly-mounted protective bottom plate, a sealing cover plate is arranged on the front side of the fermentation box body, and a sealing top plate is arranged above the fermentation box body. According to the white spirit fermentation tank with the movable protection structure, movable protection operation can be carried out according to needs, the problems that the tank body is large and is difficult to transport and easy to damage are solved, stable connection and installation are facilitated, and the practical effect is poor.

A through-type disconnectable busbar hanging device, wherein the movable busbar is hung on a transmission device, and the transmission device is fixedly hung below the top wall of a tunnel entrance; the two ends of the movable busbar are fixedly connected with a first slide rail and a third slide rail; the second slide rail is slidably connected to the inner side surface of the first slide rail, and the fourth slide rail is slidably connected to the inner side surface of the third slide rail; parallel guide seats are fixed on the top surfaces of the first slide rail, the second slide rail, the third slide rail, and the fourth slide rail, and a guide rod is installed on one side of the parallel guide seat, and a circular through hole is provided on the other side; the transmission device drives the conduit to move along the line direction, and drives the movable busbar to move along the line direction, thereby separating the first slide rail from the second slide rail, and the third slide rail from the fourth slide rail, and the guide rod is disengaged from the circular through hole of the parallel guide seat on the opposite side, and drives the conduit to rotate, driving the movable busbar to rotate upward, so as to meet the rapid closing application requirements of double-opening and single-opening civil defense doors.

The utility model discloses a tear-resistant high-temperature-resistant transmission roller for steel pipe anticorrosion production, which belongs to the technical field of steel pipe anticorrosion processing and comprises a hub, an annular belt is arranged on the periphery of the hub, two ends of the hub are fixedly connected with a support flange, and the support flange is also fixedly connected with the annular belt. A plurality of clamping grooves are formed in the periphery of the hub, a plurality of clamping blocks are arranged on the inner periphery of the annular belt, the clamping blocks and the clamping grooves are arranged in a one-to-one correspondence mode, and the clamping blocks and the clamping grooves are clamped; and the annular belt is made of a high-temperature-resistant material.

The present invention provides a thermal design method for channel heater selection and temperature field distribution. By establishing a three-dimensional model of the heater and its surrounding environment, the existing channel heater is effectively simulated and simulation calculation and analysis are performed according to simulation software to obtain simulation results. The simulation results are judged by the standard conditions of the channel heater, which greatly improves the optimization rate of the channel heater, facilitates the reasonable design of the heater structure, and avoids the problem of the channel heater being vulnerable to damage. The influence of the current and water flow on the temperature field distribution of the heater is analyzed, and the influence of the heater current and water flow on the temperature of the heater itself is effectively detected, thereby improving the service life of the channel heater.