1711 results about "Piston cylinder" patented technology

The invention discloses a special cooling device for a computer GPU (Graphic Processing Unit) cluster server, which comprises a box body, a support frame, a circulating pipe, a cooling box, a first piston cylinder, a liquid outlet pipe, an injection pipe, a liquid inlet pipe, a heat dissipation mechanism, a cooling mechanism, a detection mechanism and an auxiliary mechanism, meanwhile, a filter plate can prevent dust in air from entering, a detection mechanism monitors the temperature in the box body in real time by utilizing the thermal expansion characteristic of alcohol, and a signal is transmitted to an external controller through a pressure sensor so that a worker can master the operation temperature state of the server in real time; the cooling mechanism automatically adjusts the flow speed and flow of cooling liquid according to temperature changes so as to meet the heat dissipation requirements of the server under different loads, the auxiliary mechanism conducts rolling sweeping on a filter plate through a cleaning roller, smooth air circulation is ensured, the efficient and intelligent cooling effect is achieved, and the service life of the server is prolonged. And the operation stability and the service life of the GPU cluster server are improved.

The utility model belongs to the technical field of hydraulic execution components, and particularly relates to a hydraulic cylinder sleeve type connector which comprises a hydraulic cylinder sleeve body, a pipeline connecting piece is fixed at the upper end of the hydraulic cylinder sleeve body, an upper connecting piece is fixed inside the pipeline connecting piece, and a sealing ring is fixed at the lower end of the upper connecting piece. A centering conical barrel is fixed to the lower side of the hydraulic cylinder sleeve body, symmetrical locking hydraulic cavities are formed in the lower end of the interior of the hydraulic cylinder sleeve body, hydraulic cylinder covers are fixed to the upper ends of the symmetrical locking hydraulic cavities, limiting grooves are formed in the left side and the right side of an upper connecting piece, clamping jaws are arranged in the two limiting grooves, and a clamping block is arranged in the clamping jaws. The hydraulic piston cylinder moves to drive the piston connecting rod to move, so that the piston connecting rod drives the driving ring plate on the side wall to move, the driving ring plate is matched with the clamping jaw, the upper connecting piece and the lower connecting piece are clamped, locking and unlocking are easier, and the locking effect is better.

The invention discloses multifunctional lead brick extrusion equipment with a replaceable mold, relates to the technical field of lead processing, and aims to solve the problems of production stagnation and economic loss caused by idle equipment due to long consumed time of the whole process when the mold is replaced in the prior art, the multifunctional lead brick extrusion equipment comprises a base, and the top of the base is fixedly connected with a plurality of guide frames; the outer wall of the guide frame is slidably connected with a pair of symmetrically arranged extrusion plates, the bottom of the extrusion plate on the lower side is fixedly connected with the top of the base, the top of the guide frame is fixedly connected with a top cover, and the bottom of the top cover is fixedly connected with a hydraulic rod; and the other end of the hydraulic rod is fixedly connected with the top of the extrusion plate on the upper side, a pair of piston cylinders are arranged on the top of the base, and corresponding molds are arranged on the opposite faces between the extrusion plates. The method has the advantage that the idle time of equipment caused by die replacement is greatly shortened.

The invention discloses an electromagnetic valve vibration fatigue test device and a failure judgment method, and relates to the technical field of electromagnetic valve tests.The electromagnetic valve vibration fatigue test device comprises a test box, a conveying mechanism, a balance weight mechanism, a vibration table, an opening and closing detection mechanism and a clamping detection mechanism; the front end and the rear end of the top in the test box are fixedly connected with counterweight mechanisms, the bottom in the test box is fixedly connected with a vibration table, the right end in the test box is fixedly connected with an opening and closing detection mechanism, and the top of the vibration table is fixedly connected with a clamping detection mechanism and a conveying mechanism; the inlet and outlet pressure of the detected electromagnetic valve is detected through a sensor, failure judgment of the electromagnetic valve is achieved, then the pressure is adjusted through the combination mode of low-speed precise conveying of a piston cylinder and high-speed large-flow conveying of an external fluid conveying box, periodic fluid pressure fluctuation is applied while vibration is conducted, and the real load of the electromagnetic valve is simulated. And the superimposed effect of mechanical vibration and fluid impact is synchronously tested.

The invention relates to a bridge abutment settlement deformation monitoring device and method, and belongs to the field of bridge monitoring, the bridge abutment settlement deformation monitoring device comprises two bearing frames arranged on one side of a bridge pier and a steel wire rope I arranged between the bearing frames and used for supporting a connecting support, and the top of the connecting support is provided with a monitoring mechanism; the monitoring mechanism comprises a plurality of piston cylinders adjustably arranged at the top of the connecting support, piston push rods are slidably arranged at the tops of the piston cylinders, extension rod pieces fixedly connected with the piston push rods are fixedly arranged on one side of the pier, and display sleeves are fixedly arranged on the two sides of the connecting support. The display sleeve is communicated with the piston cylinder body through a connecting pipeline and used for transmitting liquid prefabricated in the piston cylinder body, and a piston sliding block is arranged in the display sleeve in a sliding mode. The double steel wire ropes and the tension jack form an elastic supporting system to buffer vibration, the hydraulic linkage design converts tiny settlement into visual displacement, the spring reset mechanism is matched to improve data reliability, automatic reset is achieved, continuous monitoring is supported, and the monitoring range is expanded.

The invention discloses a preassembled shockproof box-type transformer substation, and relates to the technical field of transformer substations, the preassembled shockproof box-type transformer substation comprises a transformer box and a base, damping mechanisms are arranged on the two sides of the base, the damping mechanisms are connected with the side edges of the base through mounting plates, the damping mechanisms are self-adaptive hydraulic damping mechanisms, and each damping mechanism comprises a piston cylinder, a buffer rod, a trigger assembly and an adjusting assembly; the piston cylinder is filled with hydraulic oil and provided with a piston disc dividing an inner cavity of the piston cylinder into an upper cavity and a lower cavity, the upper end of the buffer rod is connected with the piston disc, and the lower end of the buffer rod extends out of the piston cylinder and is provided with a contact block. The problems that in the prior art, when a power transformation box is installed, due to the fixed damping characteristic, a traditional spring shock absorber cannot be adjusted in a self-adaptive mode to adapt to the variable falling speed and the box body weight, and the buffering effect is mismatched with the impact working condition are solved. The device has the advantages that impact energy of different intensities is effectively dissipated through a multi-stage buffering and automatic adjusting mechanism, and the safety of electrical elements in the box-type substation during installation and operation is ensured.

The invention relates to the technical field of industrial water treatment equipment, and discloses an intelligent flushing self-cleaning filter system for industrial water treatment. A dynamic suspended matter monitoring module of the system collects three-dimensional distribution data of deposits on the surface of a filtering medium in real time, and mixed deposition characteristics of suspended solids and oil stains are recognized through a multispectral imaging technology; the differential pressure trigger control module establishes a mapping relation between sediment thickness and fluid resistance according to the three-dimensional distribution data, and generates a cleaning trigger instruction when the real-time differential pressure data reaches a dynamic threshold interval; the spiral trajectory planning module analyzes the cleaning trigger instruction, and generates a composite motion trajectory containing a rotation angular velocity and an axial displacement rate in combination with the current position of a suction nozzle and a filter screen topological structure; the multi-mode flushing execution module synchronously adjusts torque output of a hydraulic motor and linear displacement of a piston cylinder based on the composite motion trail, so that a suction nozzle covers the whole effective filtering area of a filter screen along a spiral path.

The invention relates to the technical field of compression resistance detection, in particular to a compression resistance detection device suitable for a mobile phone screen. The compression resistance detection device suitable for the mobile phone screen comprises a frame, a controller, a supporting frame, a motor, a gear set, a lead screw set, a pressure head, a supporting block, a rotating frame, a carrier roller and a control assembly, the controller is installed on the right side wall of the frame, the supporting frame is connected to the middle of the top of the frame, and the motor is installed on the top of the supporting frame. Dynamic outward movement of a screen bottom supporting force acting line is achieved through a rotating structure of the rotating frame and the carrier roller in cooperation with a buffering system of the piston cylinder, when a pressure head is loaded, the carrier roller automatically adjusts the supporting position along with screen deformation, the edge supporting force evenly moves outwards along with pressure increase, the edge local overload risk is effectively reduced, and the service life is prolonged. And compared with a traditional fixed supporting detection mode, detection data is closer to the actual compressive strength mean value of the screen.

The present application provides an oil-gas separation apparatus capable of implementing complete degassing and methods. The apparatus comprises: a piston cylinder and a degassing cylinder, a degassing solenoid valve being arranged between the degassing cylinder and the piston cylinder, one end of the degassing solenoid valve extending into the interior of the piston cylinder, and the other end thereof being in communication with the degassing cylinder; a variable speed diaphragm pump, an air intake end thereof being in communication with the atmosphere and an air discharge end thereof being in communication with the degassing cylinder for drawing ambient air, and used for cleaning a gas path of the oil-gas separation apparatus, and providing power for the degassing cylinder, thereby replacing a design involving a carrier gas cylinder or a gas generator; and a main control module. According to the present application, the piston cylinder, the degassing cylinder, the degassing solenoid valve, and the variable speed diaphragm pump are integrated and are uniformly controlled by the main control module, so that high-efficiency oil and gas separation is implemented. A unique degassing control method and a concentration calculation method are designed, so that fast and efficient degassing is implemented, nearly complete degassing is achieved without correcting a degassing rate, a mathematical model for inverse calculation of an oil sample concentration on the basis of a gas concentration is simplified, and concentration conversion is convenient.

The utility model relates to the technical field of buffering protection, and discloses a spring hydraulic buffering protection device which comprises a damping piston cylinder and a piston rod, the damping piston cylinder is matched with the piston rod, a collided head is installed at the top of the piston rod, an elastic buffering cap is installed at the top of the collided head, a thrust spring is sleeved outside the piston rod, and the elastic buffering cap is sleeved outside the piston rod. The two ends of the thrust spring are fixed to the top of the damping piston barrel and the bottom of the elastic buffer cap respectively, the elastic buffer cap is made of high-elasticity materials and can effectively absorb impact force, and the bottom of the piston rod penetrates into the damping piston barrel in a sealed mode. By utilizing the damping characteristic of liquid flow and the elastic deformation of the spring, double buffering on impact force is realized, the stability and durability of the device are obviously improved, the vibration frequency of equipment in high-speed operation is effectively reduced, and the service life of the equipment is prolonged.

The invention relates to a surge protector withstand voltage test system and method, and belongs to the technical field of surge protectors, the system comprises a test tool, the test tool comprises a tool body, a pneumatic execution component and a PCB function board, the tool body is made of bakelite, metal handles are arranged on the two sides of the tool body, and a detachable cover plate is fixed to the bottom of the tool body through hinges and lock catches; a wiring groove is formed in the inner side of the cover plate; the pneumatic execution component comprises a double-piston cylinder, a slide rail, a clamp assembly and an elastic conductive elastic needle; the double-piston cylinder drives the clamp assembly to linearly move along the X direction through the slide rail so as to clamp the surge protector to be tested; the elastic conductive elastic needle is fixed on the clamp assembly, the head of the elastic conductive elastic needle is in elastic contact with an exposed contact of the tested surge protector, and the tail of the elastic conductive elastic needle is connected to the PCB function board through a wire; the PCB function board comprises a high voltage constant current source circuit, a multipath relay switching circuit and an MCU control module.

The invention relates to the technical field of bearing tests, in particular to a loading device and a loading method for a low-temperature bearing test of a spaceflight turbine pump. Comprising a test shaft shell, a test bearing A, an axial loading gland, an axial loading piston cylinder shell, an axial loading piston, a variable-diameter piston cylinder shell, a variable-diameter piston cylinder piston, a vaporizer, a test bearing B, a liquid nitrogen pipeline, a nitrogen pipeline and a hydraulic oil pipeline. Liquid nitrogen enters a test shaft shell from a liquid nitrogen pipeline to be fully cooled and then is discharged, the liquid nitrogen is converted into nitrogen through heat exchange of a vaporizer, the nitrogen is introduced into a variable-diameter piston cylinder shell through a nitrogen pipeline to push a variable-diameter piston cylinder piston to compress hydraulic oil, and the hydraulic oil is introduced into an axial loading piston cylinder shell to generate oil pressure to push an axial loading piston to move. The axial loading piston generates thrust on the axial loading gland to promote the axial loading gland to complete thrust loading on the test bearing, the electric cylinder is adopted to directly apply push-pull force load to the variable-diameter piston rod, load fluctuation is compensated, and stability of the test load is guaranteed.

The utility model relates to the technical field of regulating valves, and discloses a self-operated high-pressure-difference regulating valve which comprises a pipeline assembly and a buffer assembly installed in the pipeline assembly, the pipeline assembly is fixedly installed on the two sides of a valve assembly, a transmission assembly is fixedly installed on the valve assembly, a feedback assembly is fixedly installed on the transmission assembly, and when equipment operates, the buffer assembly is fixedly installed on the pipeline assembly. Water flow passes through the water pipe and flows into the valve assembly, in the process, the liquid baffle is driven by high pressure to rotate and deviate inwards along the rotating rod, meanwhile, the liquid baffle is driven to rebound to the original position under the rebound effect of the rebound spring, part abrasion caused by a water hammer is avoided, meanwhile, liquid pressure is conducted to an inner cavity of the piston cylinder through the communicating pipe, and the valve element and the valve rod are driven to be pressed downwards; in the downward pressing process, the through hole in the communicating position of the through groove and the valve element is gradually reduced, and therefore flowing hydraulic pressure is adjusted more smoothly and stably.

The utility model provides fertilizer mixing equipment, which belongs to the field of fertilizer mixing, and comprises a mixing cylinder, a rotating pipe, a stirring shaft, a stirring shaft and a stirring shaft, the two mixing and stirring assemblies are mounted on the rotating pipe; the mixing and stirring assembly comprises two piston cylinders communicated with the rotating pipe, pistons capable of resetting are slidably connected into the piston cylinders, connecting rods are fixed to the pistons, stirring plates matched with the mixing cylinders are fixed to the two connecting rods, and the device further comprises an air supply mechanism; the air supply mechanism comprises an air pump, an air guide pipe and a rotating joint, the air pump is fixedly connected with the rotating joint through the air guide pipe, and the rotating joint is fixedly connected with the rotating pipe. According to the fertilizer mixing device, the telescopic stirring plate is arranged, the stirring plate rotates to turn over and mix a fertilizer, the mixing quality can be ensured, and after the stirring plate is reset, the rotating stirring plate can disturb the fertilizer, so that the fertilizer is prevented from being blocked at the discharge hole.

The utility model discloses a guiding structure and a magneto-rheological damper with the guiding structure, and relates to the technical field of guiding structures, the guiding structure comprises a guiding sleeve, a dustproof sealing ring, a guiding bearing, a buffering sealing ring and a static sealing ring, a dustproof sealing ring is arranged at the outer end of an inner hole of the guide sleeve, a buffering sealing ring is arranged at the inner end of the inner hole of the guide sleeve, the inner diameters of the dustproof sealing ring and the buffering sealing ring are matched with the piston rod, a static sealing ring is arranged between the guide sleeve and a cylinder body of the piston cylinder, and a guide bearing is arranged on the inner side of the buffering sealing ring. The buffering sealing ring can prevent iron powder particles from entering the guide sleeve, abrasive particle abrasion to the guide bearing is prevented, the service life of the guide sleeve and the service life of the guide bearing are prolonged, the sealing reliability is improved through two-end sealing, and friction force between the guide sleeve and the piston rod is reduced; assembly operation is simple, the device is suitable for automatic assembly production, the structure is simple, parts are few, and the production cost can be greatly reduced.

The utility model provides a piston cylinder body and a vehicle suspension device, comprising: a front suspension lifting component comprising a first cylinder body and a first piston, the first piston forming a first air chamber and a first oil chamber in the first cylinder body; the first high-pressure gas storage tank is communicated with the first gas cavity through a first connecting pipe; the rear suspension lifting component comprises a second cylinder body and a second piston, and the second piston enables a second air cavity and a second oil cavity to be formed in the second cylinder body; the second high-pressure gas storage tank is communicated with the second gas cavity through a second connecting pipe; the first high-pressure gas storage tank and the second high-pressure gas storage tank are communicated with the high-pressure gas pump through a first pipeline and a first communicating pipeline, the first pipeline is provided with a second valve, and the first communicating pipeline is provided with a first valve. Buffering and damping effects of the left suspension and the right suspension can be adjusted so as to meet requirements of different road conditions, and driving experience of users can be improved.

The utility model discloses biochemical engineering sewage treatment equipment. The biochemical engineering sewage treatment equipment comprises a sewage tank and a medicament expanding and feeding device, according to the utility model, the medicament expanding and feeding device is arranged on the bottom surface of the inner side of the sewage tank, medicaments are fed into the water inlet pipe through the blanking device and are mixed with sewage to form medicament liquid, and the medicament liquid firstly enters the medicament feeding pipe and then enters the vertical pipe and then is discharged back into the sewage tank through the cylinder hole in the piston cylinder, so that the medicament feeding is realized; a plurality of vertical pipes are distributed on the medicine feeding pipe, medicine feeding point positions can be increased, the diffusion efficiency of medicine in sewage is improved, and therefore the sewage treatment efficiency is improved, spring telescopic rods are arranged at the top of a pipe cover, the spring telescopic rods can provide reset elastic force for piston barrels, and the piston barrels retract to the inner sides of the vertical pipes when not used; and blockage caused by long-time exposure of the cylinder hole is avoided.

The invention discloses a multistage buoyancy adjusting device and method for an underwater vehicle, and relates to the technical field of buoyancy adjustment. The multistage buoyancy adjusting device comprises a piston cylinder type buoyancy adjusting assembly and an oil bag type buoyancy adjusting assembly; wherein the oil bag type buoyancy adjusting assemblies are integrally and annularly distributed on the periphery of the piston cylinder type buoyancy adjusting assembly, each oil bag type buoyancy adjusting assembly comprises a supporting plate, a seat body fixed to the supporting plate, an expansion and contraction bag body frame and a piston suction assembly, and the expansion and contraction bag body frames and the piston suction assemblies are arranged on the seat bodies and used for multi-stage buoyancy adjustment of the underwater vehicle; and the driving rod assembly is arranged on the seat body and is used for controlling the expansion and contraction bag body frame and the piston suction assembly in a linkage manner, so that the expansion and contraction bag body frame realizes buoyancy adjustment of the underwater vehicle through liquid oil transfer. By means of flexible application of two modes of liquid oil transfer and seawater pumping and drainage, multi-stage adjustment of the snorkeling depth of the aircraft is achieved.

A gas tightness test device and test method for a medical instrument. The test device comprises a bottom plate (1), wherein a test chamber (2) is fixedly connected to the top of the inner cavity of the bottom plate (1), a limiting cylinder (3) is slidably connected to one side of the inner cavity of the test chamber (2), a marking ring (4) is slidably connected to the inner cavity of the test chamber (2) by means of a connecting block, and a motor (5) is fixedly connected to one side of the top of the bottom plate (1) by means of a fixing block; and a detection assembly is provided in the inner cavity of the limiting cylinder (3), the detection assembly comprises a movable sealing plug (6), the movable sealing plug (6) is fixedly connected to one end of the limiting cylinder (3), and the inner cavity of the movable sealing plug (6) is in communication with a gas supply pipe (7). The top block (22) is driven by the motor (5) to move to enable the movable sealing plug (6) to move toward the fixed sealing plug (33) to seal and limit the medical instrument, the piston rod (10) is pressed by the top block (22) to allow the gas inside the piston cylinder (8) to be compressed and enter the interior of the medical instrument, and the lead screw (24) rotates to move the marking ring (4) to mark the specific gas leak position.

The utility model provides a piston type air cylinder with a control valve, a clamping mechanism and tool equipment, the air cylinder comprises an air cylinder body and the control valve, the air cylinder body is provided with a cavity, the cavity is internally connected with an air cylinder piston in a sliding mode, and the cavity is divided into an upper cavity body and a lower cavity body by the air cylinder piston; the control valve is used for controlling the air source to drive the air cylinder piston to reciprocate in the cavity in the direction of the upper cavity and the direction of the lower cavity. Wherein the control valve is installed on the air cylinder body, or the control valve is arranged close to the air cylinder body and is connected with the air cylinder body through a pipeline. By stripping the valve plate from the valve terminal, moving the valve plate to the position close to the air cylinder body or installing the valve plate on the air cylinder body, the integrated effect that the air cylinder and the control valve are integrally arranged is achieved, and therefore the action time of the air cylinder is shortened, the industrial production rhythm is prevented from being affected, redundant loss generated in the process that an air source is conveyed into the air cylinder body is avoided, and cost is reduced.

An outdoor equipment prefabricated cabin safety monitoring system disclosed by the present invention comprises a mobile monitoring mechanism, the mobile monitoring mechanism comprises a mounting strip, the lower end of the mounting strip is provided with a sliding groove, a rotating shaft is rotatably connected between the inner walls of the left and right sides of the sliding groove, and the rotating shaft is provided with a reciprocating thread layer. A sliding block is in threaded connection with the reciprocating threaded layer of the rotating shaft, the sliding block is in sliding connection with the inner wall of the sliding groove, the lower end of the sliding block is fixedly connected with a connecting rod, and the lower end of the connecting rod is fixedly connected with a smoke alarm. And the gas flowing mechanism comprises a vertical plate fixedly connected to the lower portion of the mounting strip, and the inner bottom space of the piston cylinder communicates with the smoke alarm space through a first one-way pipe. According to the monitoring system, the movable smoke alarm is adopted, in the using process, the detection range is widened, and the effect of timely response is achieved through cooperation with the gas flowing structure.

The invention discloses semiconductor processing equipment and a processing method, and belongs to the field of semiconductor wafer processing. Semiconductor processing equipment comprises a base table and an electric push rod fixed to the top of the base table, a processing disc is fixedly connected to the top of the base table, a positioning disc is rotationally connected into the processing disc, a driving part for driving the positioning disc to rotate is arranged on the base table, and the semiconductor processing equipment further comprises a mounting frame; in the downward moving process of the dropping pipette, a piston cylinder, an air exhaust plate and a connecting rod are matched to generate a negative pressure suction effect at the adsorption holes, so that a wafer is adsorbed and fixed at the top of the positioning disc, the stability of the wafer in the machining process is ensured, the wafer is prevented from inclining in the machining process, and the machining quality of the wafer is improved. The processing quality is further improved; and in cooperation with rotation of the semiconductor wafer, the photoresist is uniformly spread on the surface of the whole wafer, so that the coating quality is improved, meanwhile, the drying speed of the photoresist can be increased, and the processing efficiency of the semiconductor wafer is improved.

The utility model discloses a movable elbow blank bending die. The movable elbow blank bending die mainly comprises an upper die base, a female die plate, a lower die base, a cushion block, a male die plate and the like. A material pushing assembly and a lubricating assembly are arranged on the male die plate, and an oil pumping assembly in the lubricating assembly is in linkage with the upper die plate to achieve automatic oil pumping. The oil pumping assembly comprises a piston cylinder, a piston rod and the like, and lubricating oil can be accurately conveyed between a blank and a material pushing plate through a main oil channel and an auxiliary oil channel before bending. And the material pushing assembly pushes the formed part out of the convex mold plate through a guide column, a push plate and the like. In addition, the pushing plate is provided with an oil groove and an oil receiving groove, and the oil receiving groove can recycle lubricating oil to an oil tank for recycling. According to the die, through cooperation of all the assemblies, manual participation is reduced, efficient automatic lubricating and discharging are achieved, the production efficiency and the product quality are improved, the cost is reduced, and good practicability and economical efficiency are achieved.

The invention provides an integrated ball valve which comprises a valve body and an actuator, a ball body is arranged in the valve body, the actuator is in driving connection with the ball body through a valve rod, the integrated ball valve is characterized by further comprising an electromagnetic valve, a first piston cylinder and a second piston cylinder, a first piston is arranged in the first piston cylinder, and a second piston is arranged in the second piston cylinder. A first piston is arranged in the first piston cylinder, a second piston is arranged in the second piston cylinder, the first piston and the second piston are in meshed connection with the valve rod, and the electromagnetic valve is used for introducing medium pressure on the high-pressure side of the valve body into the first piston cylinder and / or the second piston cylinder so that the first piston cylinder and / or the second piston cylinder can act. The piston cylinder is arranged on the valve body, medium pressure is introduced, driving force is formed at the two ends of the piston through medium pressure difference, the driving force and the actuator are combined to drive the valve rod to achieve rapid opening and closing of the valve, and the problems that an actuator of an existing high-pressure working condition integrated ball valve is large in size and weight and long in opening and closing time are solved.

The invention relates to the technical field of electromagnetic brakes, in particular to an electromagnetic hydraulic braking structure and electric control electromagnetic hydraulic braking calipers. The electromagnetic hydraulic braking structure comprises a combined piston assembly, the combined piston assembly comprises a piston cylinder, the piston cylinder is provided with a first piston cavity and a second piston cavity which are communicated with each other, the first piston cavity is provided with a combined outer piston and a combined inner piston in a penetrating mode, and the second piston cavity is provided with a pressurizing small plunger in a penetrating mode; an oil storage cavity is formed outside the piston cylinder, and a plurality of oil holes are formed in the side wall of the piston cylinder and are communicated with the first piston cavity and the oil storage cavity; the electromagnet assembly comprises an armature, and the armature abuts against the combined inner piston; and the hydraulic braking assembly is internally provided with an oil way and communicates with the second piston cavity, and multi-stage pressure amplification is achieved through double-cavity linkage. Gap fluctuation between the brake pad and the brake disc in the braking process can be effectively controlled, the characteristic of large suction force of the tail end of the electromagnet is efficiently utilized, and meanwhile the stable braking effect is achieved.

The invention relates to the technical field of heating wire connecting position welding, and particularly discloses a welding device for a heating wire connecting position in an air blowing comb, the top of a workbench is fixedly connected with a connecting shaft, the connecting shaft is sleeved with a connecting block, and the side, away from the connecting shaft, of the connecting block is fixedly connected with a welding part; and feeding parts are fixedly connected to the two sides of the workbench. According to the welding device for the joint of the built-in heating wire of the blowing comb, the cleaning mechanism is arranged, a piston cylinder is driven by a moving rod to continuously move upwards, and when the pulling force of the piston cylinder to a piston plate is larger than the magnetic force of a magnetic plate and the top of a base, the magnetic plate is separated from the top of the base, and a first spring rapidly resets; the generated elastic force drives the magnetic plate to drive the piston plate to rapidly move upwards in the piston cylinder through the piston rod, gas in the piston cylinder is powerfully sprayed out through the gas nozzle, the side face of the electrode is subjected to blowing cleaning, and then residual metal chippings and oxides on the surface of the electrode tip are removed in time.

The invention discloses a combined marine heat exchanger, and belongs to the technical field of ship engineering, the combined marine heat exchanger comprises two heat exchanger shells, the number of the heat exchanger shells is two, and two fixing discs are fixedly mounted at the positions, close to the top and the bottom, between the inner walls of the heat exchanger shells correspondingly; a plurality of heat exchange tubes are fixedly mounted on the heat exchanger shell through a fixing disc; according to the heat exchanger, the piston rod slides up and down in the piston cylinder in a reciprocating mode to drive the spoiler at the top end of the piston rod to synchronously reciprocate along the outer wall of the heat exchange tube, the spoiler interacts with a shell pass medium in the moving process, and meanwhile the impeller at the top end is driven to synchronously rotate under the impact of the medium; the piston rod drives the spoiler to reciprocate and rotate and disturb the impeller, so that the flow disturbance intensity of a shell pass medium can be enhanced, the flow stability of the medium is broken, a medium retention area on the outer wall of the heat exchange tube is avoided, the heat transfer efficiency is improved, and the stability of the heat exchange performance of equipment is guaranteed.

The utility model relates to the technical field of filling devices, and particularly provides a plunger type filling valve and a filling device. The plunger type filling valve comprises a piston cylinder, a piston and a rotary valve. The piston cylinder is provided with a first end and a second end deviating from each other; the piston enters and exits the piston cylinder through the first end of the piston cylinder; the rotary valve is arranged at the second end of the piston cylinder and comprises a valve body, a rotary valve element and a first air cylinder. The valve body is provided with a valve element cavity, a first through hole, a second through hole and a third through hole which are all communicated with the valve element cavity are formed in the outer wall of the valve body, and the first through hole is connected with the piston cylinder. The rotary valve element is in a cone shape or a circular truncated cone shape and is rotatably installed in the valve element cavity, and the rotary valve element rotates in the valve element cavity so that the first through hole can be communicated with the second through hole or the third through hole. The first air cylinder is connected with the end, with the large diameter, of the rotary valve element in the axial direction and can drive the rotary valve element to move in the axial direction so that part of the rotary valve element can be separated from the valve element cavity, and the first through hole, the second through hole and the third through hole can be communicated.

The invention discloses an automobile wire harness joint connection stability detection device and method, and the device comprises an endless belt, the outer wall of the endless belt is fixedly sleeved with two symmetrically arranged bumpy pavement simulation belts, and the two bumpy pavement simulation belts are provided with an automobile simulation mechanism. The automobile simulation mechanism is provided with a plurality of groups of automobile wire harness connector plugging test mechanisms. The invention relates to the technical field of automobile wire harnesses. The pothole pavement simulation belt is driven to operate through the circulating belt, meanwhile, the electric push rod is matched with the piston cylinder, the bulging state of the rubber skin can be flexibly controlled, and various real road conditions such as bumping stability and instability are accurately simulated.

The invention belongs to fire fighting, particularly relates to the technical field of fire fighting equipment, and discloses a fire fighting hose reel which comprises a fire fighting reel body, a mounting frame is mounted on the fire fighting reel body, a circulation part is arranged on the mounting frame and comprises a case, the case is mounted on the mounting frame, a first piston cylinder is mounted in the case, and a second piston cylinder is mounted in the first piston cylinder. The middle of the first piston cylinder integrally communicates with a water inlet, one end of the first piston cylinder communicates with a water receiving pipe, a restraining part is arranged on the circulation part, forward water hammer restraining is adopted, the restraining part attenuates the instantaneous speed and pressure of water flow through kinetic energy conversion and gas buffering, the hose is prevented from being straightened and swung due to instantaneous high pressure, and the water flow is prevented from being damaged. By means of reverse water hammer digestion, inert gas backflow of the compensation portion and pressure compensation, reverse impact generated by sudden stopping of water flow is counteracted, fatigue cracking of a hose connector due to repeated impact is avoided, and secondary risks of high-pressure water flow jetting are reduced.