48results about How to "Avoid wear and deformation" patented technology

The invention relates to the technical field of heating and discloses a floor heating device based on graphene heat conduction and radiation of far with infrared ray. A heating device is included, andcomprises a corrugated sheet which is provided a heater; one end of a first heating body of the heater is connected with the first guide output end of a first cold wire, and the other end of the first heating body is connected with the second guide input end of a second cold wire; the top face of the corrugated board is provided with a graphene board which is provided with a heat conduction device; a heat conduction block of the heat conduction device is provided with a communicating hole; a temperature sensor is arranged in the communicating hole, and is connected with a temperature controller; the temperature controller is connected with a power source switch and a solid state relay; and an emitting electrode and a collecting electrode of a switch triode of the solid state relay are connected with the first guide input end of the first cold wire and the second guide output end of the second cold wire correspondingly. The floor heating device based on graphene heat conduction and radiation of far infrared ray solves the technical problems that an existing floor heating device is low in heating efficiency and poor in heating effect and has potential safety hazards.

The invention discloses an automatic putting device for a washing machine and liquid storage and ventilation structures. Each liquid storage and ventilation structure is arranged on a liquid storage box and comprises a ventilation port formed in the liquid storage box and a one-way ventilation valve installed on the ventilation port, and each one-way ventilation valve comprises a valve body, a first component and a second component, wherein each valve body is disposed in the corresponding ventilation port and extends from the exterior of the corresponding liquid storage box to the interior, each first component is disposed at one end of the corresponding valve body and movably seals the corresponding ventilation port, and each second component is disposed at the other end of the corresponding valve body to make the exterior communicated with the corresponding ventilation port. Air can enter the liquid storage boxes, and the air or liquid in the liquid storage boxes cannot be dischargedor flow out through the corresponding one-way ventilation valves so that the liquid in the liquid storage boxes can be put into the washing machine; moreover, when the liquid storage boxes are not installed on the washing machine, the function that the one-way ventilation valves seal the liquid in the corresponding liquid storage boxes is achieved, and the liquid storage boxes can be convenientlyreplaced.

The invention discloses a machining process for a bladed full-PCD milling cutter. Firstly, a notch is formed in the position, close to a PCD part, of a PCD base material by using a tool grinding machine, and then the A-axis difference angle between the notch and the PCD part is measured on a tool detector so as to determine the reference position of machining; and electrolytic grooving, electrolytic chip pocket forming, electrolytic arc rear corner forming and electrolytic end face rear corner forming are sequentially carried out, and finally the bladed full-PCD milling cutter is formed. A copper wheel electrode electrolysis method is adopted for producing the bladed full-PCD milling cutter so that the complex contour on the PCD material can be machined.

A needle feeding sewing machine has a feed dog 23 operatively connected to a vertical feed shaft 12 and a horizontal feed shaft 17 and making four-way feeding movements; a needle feed shaft 24 causing the needle- bar oscillating stand to oscillate in cloth feed direction; and switching means 27, 28 and 28a for switching between the needle feed and the low feed by changing the connection between the needle feed shaft and the horizontal feed shaft. A first engagement member 5b is provided on the needle-bar oscillating stand 5, and a first control member 33 is provided for controlling the movement of the engagement member in the cloth feed direction when the needle feed is not working. The needle feeding sewing machine reduces the backlash of a needle-bar oscillating stand during a low feed, and capable of supplying stable stitches without sewing errors such as skip stitches, nor causing deformation of the needle-bar oscillating stand.

The invention provides a ball guiding device for a bearing steel ball. The ball guiding device comprises a conveyor (1) and a conveying wheel (3) which is vertically arranged on the lower end of the ball outlet port (2) of the conveyor (1), the conveying wheel (3) is a cylindrical body which is transversely placed, the conveying wheel is opened at the upper and lower parts, a ball guiding wheel (6) which is coaxially arranged with the conveying wheel is arranged inside the conveying wheel (3), grooves (7) are uniformly distributed on the transverse direction of the ball guiding wheel (6), and the ball guiding wheel (6) is connected with a motor to rotate under the drive by the motor. By adopting the structure, since the conveying wheel is arranged on the lower end of the ball outlet port of the conveyor, each groove carrying one bearing steel ball enters into the next cleaning process, the extrusion, the abrasion and the deformation occurring in the conveying process of the bearing steel ball are effectively prevented, the quality of the bearing steel ball is ensured, and the finished rate of the bearing steel ball is improved.

The invention discloses a petroleum exploitation drill bit which comprises a connecting plate, a drill bit body, a left guide column and a right guide column. A through hole is formed in the center ofthe connecting plate, a connecting rod penetrates the through hole, the lower end of the connecting rod is connected with the drill bit body, bolt holes are formed in two ends of the connecting plate, the connecting plate can be connected with drill rigs, compression-resistant plates are fixedly mounted on the lower end surface of the connecting plate, an anti-vibration spring sleeves the connecting rod and is arranged between the compression-resistant plates and the upper end surface of the drill bit body, and the left guide column and the right guide column are arranged on two sides of theconnecting rod and are arranged between the compression-resistant plates and the upper end surface of the drill bit body. The petroleum exploitation drill bit has the advantages that the petroleum exploitation drill bit is novel in structural design and has excellent compression-resistant, abrasion-resistant and anti-vibration functions, deformation abrasion phenomena of the drill bit body can beeffectively prevented, the service life of the petroleum exploitation drill bit can be prolonged, and the petroleum exploitation efficiency can be improved.

The invention provides a staged hard rock breaking hob drill bit. The staged hard rock breaking hob drill bit comprises a drill bit body, wherein the working end of the drill bit body is provided with a second-stage cutter head and a first-stage cutter head which have height difference from inside to outside, the rear end of the first-stage cutter head and the rear end of the second-stage cutter head are connected with drilling tool systems with different frequencies correspondingly and used for achieving frequency division drilling, the front ends of the first-stage cutter head and the second-stage cutter head are used for being connected with a cutter holder and a hob correspondingly, a slurry supplementing device is arranged on the periphery of the working end of the drill bit body, and a slurry sucking device is arranged on the first-stage cutter head. According to the staged hard rock breaking hob drill bit, due to the fact that the first-stage cutter head is ahead of the second-stage cutter head, large and small holes with the height difference can be formed in the drilling process, and the small holes are arranged below the large holes, so that a free surface is added between the large and small holes, and rock breaking of the drill bit is facilitated; in addition, the staging design of the cutter heads plays a stabilizing role in the drilling process, the number of revolutions can be effectively increased, the rock breaking frequency of the hob is improved, and meanwhile, the absorption of drilling slag is facilitated.

The invention discloses a circular inside-release oil pump composed of a pump body, a rotor pair, a pressure limiting valve, a spring, an end plug, a seal ring and a pump cap. The pump body is provided with an oil inlet, an oil outlet, a pressure limiting hole, an inside-release oil channel, an oil-in chamber, an oil-out chamber, a rotor hole, a rotor shaft hole, a main mounting hole, a locating hole, a side mounting hole and a flange hole. The pressure limiting valve, the spring, the seal ring and the end plug are sleeved with the pressure limiting hole, the break-off side of the pressure limiting hole is provided with an oil release hole and an oil drainage hole which communicate with the inside-release oil channel, a circle is disposed between the oil release hole and the oil drainage hole. The rotor pair is sleeved with the rotor hole and the rotor shaft hole, the pump cap is fixed to the pump body, and a clearance fit is provided between the pump body and the rotor pair. The rotor rotates clockwise in the rotor pair, oil is taken in from the oil inlet and drained from the oil discharge hole. When the oil drainage pressure is higher than a set value, surplus oil will release to the oil-in chamber through the pressure limiting valve and the inside-release oil channel. Compared with the prior art, the circular inside-release oil pump is large in output volume of unit volume, simple in structure, high in volumetric efficiency, reliable and stable in performance and long in service life.

The invention discloses a special water pump unit for preventing gravel blockage. The special water pump unit for preventing gravel blockage comprises a bottom plate, wherein a unit installation baseis fixedly arranged at the upper end of the bottom plate; a shock pad is arranged at the upper end of the unit installation base; a water pump unit body is fixedly arranged at the upper end of the unit base; a shower nozzle connector is fixedly arranged at the lower end of a water inlet pipe; a screw thread matched with a screw groove is arranged on the upper end surface of a water inlet cylinderbarrel; a precise filter screen is fixedly arranged at the lower end of the water inlet cylinder barrel; and a coarse filter mesh plate is fixedly arranged at the lower end of a connecting plate and located on the outer side of the precise filter screen. According to the special water pump unit for preventing gravel blockage provided by the invention, impurities in water pumped by the water pump can be firstly coarse-filtered through the coarse filter mesh plate and are then fully filtered through the precise filter screen, so that the water pump unit is prevented from being blocked by gravel;and the whole water pump unit can be shielded through a shielding plate so as to be prevented from exposing to the weather, so that the service life of the water pump unit is favorably prolonged.

The invention discloses a fixture for plating a semiconductor lead frame and a plating method thereof. Only a clamp port of a lower piece of the fixture is electrically connected with a to-be-clamped rib of the semiconductor lead frame, and other parts are electrically insulated. The plating method includes the steps that when the lead frame is a unilateral rib, only the fixture with the clamp port with the same shape with a side rib is used for fixing the side rib for plating; when the lead frame is only provided with a middle rib, only the fixture with the clamp port with the same shape with the middle rib is used for fixing the middle rib for plating; and if the lead frame is a bilateral rib, one side rib is coated with an insulation paste, and the fixture is used for clamping the other side rib for the plating. A side rib glue spreader comprises a horizontally annularly circular chain sprocket drive mechanism, a feeding bracket, a blanking retaining board, a glue spreading mechanism, an air knife, a drying groove and a hot wind cover. The fixture has the advantages that the side rib or the middle rib can be prevented from being plated by a tin coating, materials are saved, and the side rib and the middle rib can be recovered directly; and the operation is convenient, the process is reliable, production and labor costs can be reduced, production efficiency can be improved, and a deplating process of the plating fixture can be omitted.

The invention discloses an elbow baffling structure of a nuclear power plant heat exchanger. The elbow baffling structure comprises a plurality of heat exchange tubes, a heat exchange shell pass whichis provided with a plurality of elbows and arranged outside the heat exchange tubes in a sleeving mode, and a baffling body which is arranged in the elbows and used for fixing the heat exchange tubes, wherein the baffling body comprises a positioning ring connected with the inner walls of the elbows, and a baffling plate closing the inner side of the positioning ring; the baffling plate is formedby splicing a plurality of baffling sheets; and the sides, close to each other, of every two adjacent baffling sheets are provided with a plurality of clamping grooves which correspond in a one-to-one mode and are used for fixing the heat exchange tubes correspondingly. Compared with the prior art, according to the elbow baffling structure of the nuclear power plant heat exchanger, by splicing the multiple baffling sheets into the baffling plate, the heat exchange tubes are washed by a shell pass medium laterally, and the heat exchange efficiency is improved; and the baffling sheets are provided with the clamping grooves for fixing the heat exchange tubes, thus, the heat exchange tubes cannot move radially, abrasion or deformation of the heat exchange tubes due to radial movement is avoided, thus, the product quality is improved, and the service life is prolonged.

The invention discloses a foam launching device, which comprises an infusing pipeline, an injection pipeline, a first rubber cover, a second rubber cover and a rear cover, wherein the injection pipeline is just arranged in an embedded pipeline of a shield machine, and two ports of the injection pipeline are respectively connected to a cutter head front panel and a cutter head rear panel; the centers of the first rubber cover and the second rubber cover are respectively fixedly arranged at intervals in one port of the injection pipeline close to the cutter head front panel to form a foam jet hole, and the peripheral surfaces of the first rubber cover and the second rubber cover are just in contact with the inside surface of the injection pipeline; the rear cover is fixedly arranged on one end face of the injection pipeline close to the cutter head rear panel; the lateral surface of the injection pipeline is provided with an opening, a foam infusing port is formed at one end of the infusing pipeline, and the other end of the infusing pipeline is communicated with the opening. Through the device, slurry can be effectively prevented from refluxing to block the pipelines, stable foam jet operation is ensured, the rubber covers can be effectively prevented from being abraded, the service life of the device is prolonged, and the cost of the shield machine is reduced.

The invention discloses a motor used needle bearing cage structure which comprises two parallelly arranged outer rings (1) and beams (9) connecting the two outer rings (1); wherein the beams are uniformly distributed circumferentially; a through groove (3) is opened along the width direction on the top surface of the beam (2); two lateral walls of the through groove (3) are respectively close to inner end surfaces of the two outer rings (1). By slightly modifying the beam, the structure can effectively prevent the needle bearing cage from wearing and deforming and greatly improve the service performance of a crank-connecting rod and an entire motor. The structure is characterized by ingenious design, simple structure, easy implementation, etc.

The invention relates to a method of strengthening a mould manufactured from aluminium or its alloys. One method of strengthening a mould having mould body and mould walls as an integral unit is to include at least one insert into each of the mould walls. These inserts are of stronger material or materials as compared to the mould material. Each of these inserts is of the same height as that of the mould wall at the position where it is located. Another method uses reinforced walls which are separate units, with the reinforced walls made of a higher strength material or materials than that of the mould body. The reinforced walls are coupled to the mould body either by fasteners or by welding or bonding or by any other suitable means. The invention also relates to moulds including strengthening according to one or more of these methods.

The invention discloses a guide column. The guide column comprises a column body. One end of the column body is an insertion end. A supporting foot with the diameter being smaller than that of the insertion end is arranged at the end socket of the insertion end in the axial direction of the column body, and the supporting foot extends out of the insertion end. When the guide column is used as a bearing part to support objects, the supporting foot arranged at the insertion end is supported on the ground, and the insertion end of the column body is prevented from making contact with the ground directly, so that the condition that the insertion end bears excessive weight and then is deformed, and consequently the normal guiding function of the guide column is influenced is avoided; and the diameter of the supporting foot is smaller than that of the insertion end, the support foot does not interfere a guide hole when the guide column is used, and thus the normal guide function of the guide column can be achieved.

The invention provides a low-nitrogen combustion device for a cement kiln tail. The low-nitrogen combustion device comprises two combustion device bodies which are symmetrically arranged on a conicalpart of a decomposing furnace, one combustion device body is arranged below an inlet of a tertiary air pipe and close to a reducing position, and the other combustion device body is arranged on the opposite side of the tertiary air pipe; each combustion device body comprises a connecting sleeve connected to the decomposing furnace, a pulverized coal nozzle, a rotatable air guide blade, an air guide blade sleeve, an adjusting end cover and the like, the rotatable air guide blades adjust the flow of a mixture of pulverized coal and air according to actual production requirements, excessive pulverized coal injection is avoided, fuel consumption is reduced, meanwhile, crusting of the inner wall of the decomposing furnace is reduced to a certain extent, and the service life of equipment is prolonged; nitrogen oxide formed by high temperature in a kiln is reduced through reducing atmosphere generated by oxygen-deficient combustion of the pulverized coal, nitrogen emission is reduced, and therefore the purposes of energy conservation and emission reduction are achieved. The device is simple in structure, low in construction cost, low in requirement for installation space, particularly suitable for old system transformation and capable of effectively protecting the environment.

The invention discloses a high and low pressure piston assembly for a super-high pressure pump. The high and low pressure piston assembly for the super-high pressure pump comprises a piston subassembly and a high pressure side piston subassembly. The piston subassembly comprises a low pressure piston and a high pressure piston rod, the low pressure piston is fixedly connected with one end of the high pressure piston rod, an O-shaped ring is arranged on the outer side of the low pressure piston, and a concave ring table is arranged at the other end of the high pressure piston rod. The high pressure side piston subassembly penetrates through the high pressure piston rod and installed on the concave ring table, a lock nut is arranged on the outer side of the high pressure piston subassembly,a spring pin is arranged on the outer side of the lock nut, the high pressure piston subassembly comprises a high pressure piston core component and a high pressure piston cover component, and an adjusting shim is arranged between the high pressure piston core component and the high pressure piston cover component. The low pressure piston and a high pressure piston are connected into a whole through the high pressure piston rod, so that the concentricity and perpendicularity of the high pressure piston and the low pressure piston are guaranteed, and abrasion deformation of the high pressure piston in the repeated operating process is prevented. The adjusting shim is arranged between the high pressure piston and a high pressure piston cover, so that the gap between the high pressure pistonand the high pressure piston cover is reduced, and airtightness is improved.

The invention relates to the technical field of paper machines, and discloses a device capable of effectively clearing paper machine dry net stickies and preventing dry net abrasion. The device comprises a shell, a rotating shaft is rotatably connected to the surface of the shell, a first belt wheel is fixedly connected to the surface of the rotating shaft, a second belt wheel is arranged in the shell, and a first guide rail is fixedly connected to the interior of the shell, and a first sliding block is slidably connected to the surface of the first guide rail. According to the device capableof effectively cleaning paper machine dry net stickies and preventing dry net abrasion, same net scraping plates are arranged on the two faces of a dry net layer, so that the two faces of the dry netlayer are evenly stressed when the dry net layer is cleaned, the problem of abrasion deformation caused by face-to-face stress of the dry net layer is solved, and the effects of protecting the dry netlayer, prolonging the service life, saving resources and improving the production efficiency are achieved; and a belt wheel rotates to drive a pair of rotating rods, a connecting rod and the first sliding block to move, so that the pair of net scraping plates clean the dry net layer, and the effect of rapidly removing stickies to improve the production efficiency is achieved.

The invention provides a robot foot processing fixture. The robot foot processing fixture comprises a base, a central positioning hole formed in the center of the base, side positioning holes formed in two sides of the base, a pressing plate, a compression bolt and plug pins, wherein the compression bolt is used for compressing a robot foot on the base through the central positioning hole and the pressing plate; the plug pins are used for fixing the robot foot on the base through the side positioning holes formed in the two sides of the base. The structural characteristics of the robot foot are fully considered, the central positioning hole formed in the center of the base corresponds to a center hole of a workpiece, and the robot foot is positioned on the base through the pressing plate and the compression bolt and is fixed on the base by inserting the plug pins into side holes of the robot foot and the side positioning holes in the base; as the center of the fixture is overlapped with the center of the robot foot and the fixture is fixed in the center of a workbench of a machine tool, a zero point at each angle is not required to be calculated in the processing process, and the processing is more convenient and accurate.

The invention discloses a constructional engineering clamping devicefor hoisting various pipes. The device comprises a base plate, a first fixing block is fixedly installed on one side of the bottom of the base plate, a rotating rod is rotatably installed on the lower section of the first fixing block, a driven bevel gear is coaxially and fixedly installed on one side of the rotating rod, the driven bevel gear is connected with a driving bevel gear in an engaged mode, a rotary knob is fixedly installed at the top of the driving bevel gear, the top of the rotary knob rotationally passes through the top of the base plate, a second fixing block is fixedly installed on the other side of the bottom of the base plate, a threaded sleeve is rotationally installed on the lower section of the second fixing block, a threaded rod is coaxially and rotationally sleeved with the end of one side of the threaded sleeve and coaxially and fixedly installed at the end of one side of the rotating rod, the end of the other side of the rotating rod is rotationally connected with a bearing, the bearing is fixedly installed in the middle section of one side of an auxiliary moving block, main connecting arms are rotationally installed on the two sides of the auxiliary moving block through first rotating shafts, and the bearing is rotationally mounted at the end part of the other side of the threaded sleeve and is fixedly mounted in the middle section of one side of a main moving block.

The invention discloses a weight training device. The weight training device comprises a base unit, a magnetic attraction unit, a balance weight unit and a handle unit. The handle unit comprises a grab handle, two anti-rotation modules connected to the left end and the right end of the grab handle in a sleeving mode, two balance weight adjusting modules and two balance weight wheels rotationally installed on the balance weight adjusting modules respectively; each balance weight adjusting module is provided with a plurality of embedding and clamping assemblies; each anti-rotation module is provided with a magnetic fastener which is detachably inserted into the corresponding balance weight wheel in a clamped mode; when an installation base is arranged on the base unit, the magnetic fastenerscan be driven by the magnetic force of magnetic attraction pieces to be disengaged from the balance weight wheels, and therefore, the embedding and clamping assemblies can be driven to rotate to adjust balance weight; the magnetic attraction pieces drive the magnetic fasteners to act through the magnetic force, and therefore, the situation that the magnetic fasteners are abraded and deformed dueto long-term use can be avoided.

The invention relates to a hydraulic jack with high jacking force. The hydraulic jack comprises a base mechanism, a handle lever mechanism, a driving mechanism and a lifting mechanism. The base mechanism comprises a base composed of two upwards extending supporting plates, and wheels are arranged on the base. The lifting mechanism comprises a base, a limiting shaft set and a lifting seat. The basecomprises a fixing pillar arranged between the two supporting plates, and pull rods are connected to the two ends of the fixing pillar correspondingly. The limiting shaft set comprises a limiting shaft rod penetrating the two supporting plates, and the part, located between the two supporting plates, of the limiting shaft rod is sleeved with a shaft sleeve. The lifting seat comprises an ejectinghead, the side end of the ejecting head is movably connected with an outer side plate and an inner side plate, a rib plate is arranged between inner side plates of the two side ends of the ejecting head, and strengthening plates are connected to the two sides of the rib plate. Clearances are formed between the pull rods and the strengthening plates, and clearances are formed between the pull rodsand the inner side plates. Guide slopes are arranged on the end faces of the two sides of pull rod shafts. The hydraulic jack with the high jacking force has the following beneficial effects that thehigh jacking force and the high jacking stroke are achieved, and the structural strength of the lifting mechanism and a handle seat is ensured.

The invention discloses a foam launching device, which comprises an infusing pipeline, an injection pipeline, a first rubber cover, a second rubber cover and a rear cover, wherein the injection pipeline is just arranged in an embedded pipeline of a shield machine, and two ports of the injection pipeline are respectively connected to a cutter head front panel and a cutter head rear panel; the centers of the first rubber cover and the second rubber cover are respectively fixedly arranged at intervals in one port of the injection pipeline close to the cutter head front panel to form a foam jet hole, and the peripheral surfaces of the first rubber cover and the second rubber cover are just in contact with the inside surface of the injection pipeline; the rear cover is fixedly arranged on one end face of the injection pipeline close to the cutter head rear panel; the lateral surface of the injection pipeline is provided with an opening, a foam infusing port is formed at one end of the infusing pipeline, and the other end of the infusing pipeline is communicated with the opening. Through the device, slurry can be effectively prevented from refluxing to block the pipelines, stable foam jet operation is ensured, the rubber covers can be effectively prevented from being abraded, the service life of the device is prolonged, and the cost of the shield machine is reduced.

The invention discloses a belt conveyor characterized by enabling materials to be located on the lower layer. The belt conveyor comprises a groove-shaped supporting roller set, a feeding mechanism anda discharging mechanism. The groove-shaped supporting roller set is arranged below a lower-layer belt of the belt conveyor. The feeding mechanism comprises a material guide groove and a spout, wherein the material guide groove is formed between the lower-layer belt and an upper-layer belt, and the spout is obliquely inserted into the material guide groove from a gap formed between the upper-layerbelt and the top end of the material guide groove. The material guide groove is close to the tail portion of the belt conveyor. The discharging mechanism comprises a discharging device, wherein the discharging device is arranged between the lower-layer belt and the upper-layer belt and is close to the head of the belt conveyor. By the adoption of the belt conveyor, the upper-layer belt is used for covering the materials on the lower-layer belt, and therefore the influence of the weather on the materials is avoided, and the daily inspection tour and equipment maintenance are not affected.

The invention relates to a long kidney-shaped elastic clamping device for rotating mop rods. The long kidney-shaped elastic clamping device comprises the multiple mop rods, mop rod joints, long kidney-shaped elastic clamping assemblies, and a mop disc. The long kidney-shaped elastic clamping assemblies are obliquely arranged below a long kidney-shaped elastic sleeve by adopting hinge supporting holes, the distance between the mop disc to the circle centers of the hinge supporting holes is obviously decreased, and thin seams are convenient to clean; in order to solve the problem that the pressed deformation amount of rubber above the hinge supporting holes is large due to oblique arrangement of the hinge supporting holes is solved, and deformation compression holes are designed and formed above the hinge supporting holes. The long kidney-shaped elastic clamping device is characterized in that when the multiple mop rods swing, the phenomenon that the long kidney-shaped elastic sleeve is clamped to the mop rod joints due to the rubber at the upper end of the long kidney-shaped elastic sleeve is pressed and transversely expanded is avoided, swinging is flexible, the compression deformation amount of the rubber is decreased, and plastic deformation is avoided; the function of conveniently cleaning slots is achieved, time and labor are saved, the long kidney-shaped elastic clamping device is easy and efficient to use, the service life of the long kidney-shaped elastic clamping device is prolonged, a client can use the long kidney-shaped elastic clamping device more comfortably, and the better user experience is achieved.

The invention relates to the field of valve design and particularly discloses a spin one-way valve. By arranging a sinking type groove on a valve body, a part of impurities in a fluid medium is effectively stored, and influence on opening and closing of a valve clack caused by too much accumulation of the impurities is prevented; by arranging a valve seat with an inclined angle and the valve clackwith an inclined angle, impacts on the end surface of the valve seat by the valve clack and on the valve clack by the medium are effectively retarded, the end surface of the valve seat is prevented from being worn, and non-strict sealing of the valve body is further avoided; by arranging structures of a detachable wear-resistant liner and a sealing short shaft pin, wear on the contact surface ofa long shaft pin caused by rotation of a rocker when the valve clack is opened or closed is effectively avoided, and the short shaft pin can also be avoided from being worn and deforming; meanwhile, by plating chromium on the surface of the wear-resistant liner, the wear resistance can also be improved; and by designing a valve clack dovetail groove on the side surface of the valve clack and mounting a sealing rubber ring, the sealing performance of the spin one-way valve is effectively improved.

The invention provides an electrical receptacle connector which comprises a rubber core seat, a first terminal group, a second terminal group, a middle metal sheet and a shielding assembly. The firstterminal group and the second terminal group are arranged in the rubber core seat and are respectively exposed out of two opposite sides of the rubber core seat; the middle metal sheet is arranged inthe rubber core seat and is positioned between the first terminal group and the second terminal group; the shielding assembly comprises a first sheet-shaped component and a second sheet-shaped component. The first sheet-shaped component and the second sheet-shaped component are at least partially embedded into the other two opposite sides of the rubber core base respectively, the first sheet-shaped component comprises a first step structure and a first contact part, and the second sheet-shaped component comprises a second step structure and a second contact part.

A guide wheel device for a rail vehicle, comprising a guide wheel cooperating with a track to guide the car body, a base connected to the car body, and a vibration damping assembly elastically supporting the guide wheel, characterized in that the vibration damping assembly spans along the direction of the track It is erected on the front and rear sides of the guide wheel. The axle of the guide wheel is fixed at the center of the shock absorber assembly. The shock absorber assembly is elastically connected to the base. During driving, the guide wheel follows the elastic movement of the shock absorber assembly on the base and keeps guiding with the track. Cooperate. The invention prolongs the service life of the guide wheel, improves the effectiveness of guide cooperation between the guide wheel and the track, ensures the support of the guide wheel to the vehicle during the operation of the vehicle, and improves driving safety. Reduce the tilt angle of the vehicle during the turning process, and improve the guiding reliability of the guide wheel in the operating condition of the vehicle. The invention also provides a method for adjusting the position of the guide wheel of the guide wheel device for rail vehicles.