229 results about "Hand pump" patented technology

The invention discloses a point load experiment device for measuring rock deformation parameters, which comprises a device frame, a loading device and a control monitoring system, and the loading device and the control monitoring system are both mounted on the device frame. The device frame is mainly composed of a sectional material, a T-shaped connecting plate, a right-angle connecting piece and a columnar connecting circle. The loading device is mainly composed of a point load upper pressure head, a point load lower pressure head, a receiving disc, a hydraulic jack, a first quick connector, a manual pump, a second quick connector, an unloading valve and a connecting pipe. The control monitoring system is composed of a pressure sensor, a laser distance measuring sensor, a bearing piece, a lead screw, a linear rail, a sliding block, a stable bearing piece, a motor connecting piece, a coupler, a motor, a power source and a control box. The traditional point load experiment is combined with mechanical transmission, hydraulic transmission, a sensor technology, an automatic control technology and the like, so that the determination of the rock point load strength, and the determination of rock deformation parameters and corresponding stress-strain curves under the action of the point load are realized.

The utility model relates to the technical field of breathing machines, and discloses a portable noninvasive breathing machine which comprises a shell, a connecting box is arranged in the right side of the shell, air bags are installed on the left side and the right side of the connecting box, an exhaust pipe is arranged on the rear side of the connecting box, an air inlet pipe is arranged on the front portion of the connecting box, and a filtering mechanism is arranged on the front portion of the air inlet pipe. One-way valve mechanisms are arranged in the opposite sides of the air inlet pipe and the air outlet pipe. According to the portable noninvasive breathing machine, the compression cover is rotated, the compression cover is detached from the right end of the shell, then a hand penetrates through the handle and holds the compression cover, the compression cover is pressed in a reciprocating mode, the compression cover is made to press the air bag in a reciprocating mode, manual pumping can be carried out, temporary emergency use can be carried out in a power-off state, and the portable noninvasive breathing machine is convenient to use. After the filtering sponge is replaced, the filtering box is inserted into the air inlet pipe, the knob is loosened, the torsional spring can reset the knob, the sliding groove can be blocked through the knob, the filtering box is prevented from falling off, and mounting and dismounting are quite easy and convenient.

A flat-pack liquid dispensing station comprised of sheet material and configured to store or use a variety of liquid containers including plastic gallon bottles affixed with liquid dispensing hand pumps. The dispensing station may further comprise a shelf with an opening to accommodate the head of a pump and aid in restricting the movement of the liquid container.

The utility model relates to the field of motor and gear assembly, and discloses a motor and gear interference connection device, which is used for interference connection of an inner taper hole of a motor shaft and a taper end of a gear, and comprises a handheld hydraulic cylinder, a fastener, a screw rod and a manual pump, two ends of the screw rod are respectively connected with the motor shaft and the fastener; one end of the handheld hydraulic cylinder is tightly attached to the end face, away from the taper end, of the gear, and the other end of the handheld hydraulic cylinder is tightly attached to the fastener; the handheld hydraulic cylinder is provided with a hydraulic combination connector communicated with the interior of the piston cavity, the hydraulic combination connector is connected with a manual pump, and the manual pump provides required hydraulic pressure to drive the handheld hydraulic cylinder. The device can determine the press-in force of the gear, is small and portable, is suitable for indoor and outdoor assembly, and cannot cause damage to threads in the inner hole of the motor shaft due to the assembly problem.

The utility model provides a quick emergency control system for a hydraulic crane. The quick emergency control system comprises a manual pump, an oil cylinder, a lifting motor and a hydraulic rotary motor, the lifting motor is connected with the main valve through a winch control valve group; the winch control valve group comprises a first shuttle valve, a balance valve, a second hydraulic reversing valve, a one-way pressure reducing valve, a third hydraulic reversing valve, a second speed regulating valve, a second hydraulic control one-way valve, a second oil supplementing valve and a second shuttle valve; wherein the port A is connected with the port A1 through the second hydraulic reversing valve, the port B is connected with the port B1 through the balance valve, the first shuttle valve is arranged between the A-A1 oil way and the B-B1 oil way in parallel, and the middle position of the first shuttle valve is sequentially connected with the second shuttle valve, the second hydraulic reversing valve and the one-way pressure reducing valve; and an FL port is sequentially connected with a second oil supplementing valve, a second speed regulating valve and a third hydraulic reversing valve. According to the system, the high-efficiency control valve group is integrated and comprises a plurality of hydraulic reversing valves and speed regulating valves, so that the system can respond quickly, and the quick action of the lifting and rotary motor is realized.

The present invention belongs to the technical field of rail trains, and relates to a rail train hydraulic brake system slow-release device. The present invention also relates to a control method for a rail train hydraulic brake system slow-release device. A reversing valve module (A) includes a shuttle valve (1), a first pressure switch (2), and a second pressure switch (3). A manual pump module (B) includes a manual pump (4), an oil tank (5), and a pressure relief valve (6). The shuttle valve (1) is connected to the oil tank (5) through a first pipeline (7). A manual pump (4) is provided on the first pipeline (7). The shuttle valve (1) is connected to an auxiliary relief unit (9) through a second pipeline (8). The shuttle valve (1) is connected to a clamp (11) through a third pipeline (10). The first pipeline (7) is connected to the pressure relief valve (6). The rail train hydraulic brake system slow-release device of the present invention is easy to operate, can reliably complete relief and braking, effectively prevents the risks caused by misoperation and forgetting to restore the gear position, and reduces the probability of misactivation.

The present invention provides a hydraulic system and a road roller. The hydraulic system includes: a pressure oil source; an oil tank; a first control valve, the oil inlet of the first control valve is connected to the pressure oil source; a brake, connected to the working oil port of the first control valve; a manual pumping device, connected between the oil tank and the brake; when the road roller is in a first brake release mode, the pressure oil source supplies oil to the brake; when the road roller is in a second brake release mode, the manual pumping device is connected to the oil tank to supply oil to the brake. The hydraulic system of the present invention can release the parking brake through the manual pumping device when the engine is turned off, making it easy to move the road roller to a safe area or maintenance area by means of a trailer or other equipment. At the same time, it can effectively reduce the potential safety hazards caused by the failure of the brake to obtain the required working oil pressure in time due to damage to the road roller, power failure, etc.

The hydraulic manual pump convenient to carry comprises a pump body and a handle, the handle is arranged at one end of the top of the pump body through a connecting block, a supporting frame is arranged in the middle of one side of the pump body, annular blocks are arranged at the two ends of the outer side of the supporting frame, and a transverse first lead screw is arranged at the position, corresponding to a groove, in the supporting frame through a bearing seat; first threaded blocks are connected to the positions, corresponding to the annular blocks, of the two ends of the first lead screw through reverse threads, one sides of the first threaded blocks are connected with the inner sides of the annular blocks through open grooves, a first bottom block is arranged at the end, close to the connecting block, of the bottom of the pump body, and a second lead screw is arranged in a groove in the top of the first bottom block through a bearing seat; the two ends of the second lead screw are connected with second threaded blocks through reverse threads, and L-shaped supporting blocks are arranged at the bottoms of the second threaded blocks. According to the utility model, through the shoulder strap bearing device, the carrying is more convenient, and the supporting area of the bottom can be increased during use.

The light-weight fender support comprises a tubular beam, at least two fender supports are arranged on the outer side of the tubular beam, an oil pump support is arranged between every two adjacent fender supports, the oil pump supports are provided with a plurality of mounting holes formed at intervals, an electric pump button supporting plate is arranged at the front end of each oil pump support, and an electric pump button is arranged on the electric pump button supporting plate. A base is arranged at one end of the tubular beam and used for being connected with a frame. The oil pump support with the electric pump button supporting plate is arranged between the two adjacent fender supports, so that the oil pump support can be provided with a manual pump or an electric pump, the occupied space of the oil pump support is reduced, meanwhile, the oil pump support is light, and the problem that in the prior art, a fixing plate of a single structure is adopted for the oil pump support, and cost is low is solved. The technical problems that the weight of a support assembly is increased and the light weight level of a whole vehicle is limited due to the fact that the design can only meet the fixing requirement of a manual pump and an independent fixing support needs to be additionally arranged to meet the installation requirement of an electric pump are solved.

The utility model discloses an adjustable pressure reducing valve structure of an airplane wheel jack, which relates to the field of pressure reducing valves and comprises a hydraulic manifold block, a one-way valve is arranged at the bottom of the hydraulic manifold block and comprises a one-way hole arranged at the bottom of the hydraulic manifold block, and a one-way valve steel ball and a one-way valve seat are sequentially arranged in the one-way hole from top to bottom. An overflow valve is arranged on one side of the hydraulic integrated block and comprises an overflow hole formed in one side of the hydraulic integrated block, and an overflow valve steel ball, an overflow valve seat, an overflow valve spring and an overflow valve element are sequentially arranged in the overflow hole from inside to outside. Compared with an existing pressure reducing valve, the pressure reducing valve has the advantages that the space of the pressure reducing valve is effectively saved, good pressure reducing performance is guaranteed, the pressure difference between the pressure of a low-pressure hand pump and the pressure of a high-pressure hand pump is reliable, pressure reduction is achieved, and the pressure reducing valve is compact in structure, light in weight and small in size.

The utility model discloses a transverse moving device which comprises two C-shaped frames, a lead screw rectangular pipe is arranged between the two C-shaped frames, universal wheels are arranged at the two ends of the lower walls of the two C-shaped frames, a supporting mechanism is arranged between the two C-shaped frames and the ground, and two force arm rods are symmetrically and movably arranged on the side wall of one side of the lead screw rectangular pipe. A hydraulic cylinder and an enclasping limiting piece are connected between the two force arm rods, round pipes are rotationally arranged on the side walls of the two force arm rods correspondingly, the other ends of the two round pipes are connected with an airplane wheel limiting plate, and two first rollers and two second rollers are rotationally arranged between the force arm rod and the airplane wheel limiting plate which are located on the same side correspondingly. And a manual pump is mounted on the side wall of the other side of the screw rod rectangular pipe, and the manual pump and the hydraulic cylinder are arranged in a matched mode. The utility model relates to the technical field of transverse movement of unmanned aerial vehicles. According to the transverse moving equipment, the hydraulic rods in the hydraulic cylinders contract to drive the airplane wheel limiting plates to be lifted through oil return of the manual pumps, and stable holding and lifting of the unmanned airplane wheels are achieved.

The invention provides a hydrate formation-decomposition process isotope continuous monitoring device and method, and is applied to the field of natural gas hydrate development, the device comprises: a high pressure reaction system comprising a rubber cylinder, a stainless steel shell, a liquid inlet valve and a hand pump; the fluid control and automatic sampling system comprises a vacuum pump, an electric back pressure valve, a gas sampling line, a one-way valve, a gas inlet valve, a ventilation pipeline and a high-pressure gas cylinder; the continuous analysis and monitoring system comprises a first temperature sensor, a second temperature sensor, a first pressure sensor, a second pressure sensor, a third pressure sensor and an isotope mass spectrometer; the temperature control circulating system comprises a water bath circulating pump and a water bath tank; and the data acquisition and control system comprises an online computer, a programmable logic controller (PLC) unit and a flow meter. According to the device, online continuous monitoring of isotope composition in the natural gas hydrate phase change process is achieved, dynamic collection of parameters such as temperature and pressure is combined, and the precision and continuity of experimental monitoring are improved.

The invention discloses a flexible self-suction detection device and method for a fuselage pressure sensor, belongs to the technical field of air tightness testing of aircrafts, and solves the problems that an existing air tightness testing mode is tedious in operation and low in detection efficiency. The flexible self-suction detection device for the fuselage pressure sensor comprises a cross beam, wherein at least one hand pump suction cup and a plurality of suction cup assemblies are mounted at the bottom of the cross beam; the multiple suction cup assemblies are communicated through air pipes. And the air pipe is connected with an atmosphere data tester. During use, the hand pump suction cup is adsorbed on the fuselage skin, each suction cup assembly corresponds to the pressure hole in the surface of each skin, the air pressure holes can be subjected to air detection testing at the same time by connecting the air data tester with the air pipe, the testing efficiency is improved, and the working intensity is reduced; a height difference exists between the sucker body and the hand pump sucker assembly, the spring is compressed after the hand pump sucker adsorbs, counter-acting force is applied to the sucker body, the sucker body is pressed on a machine body, and therefore the pressure hole is sealed.

The invention relates to the technical field of blasting, and discloses an explosive injection device for static blasting, which comprises an explosive injection mechanism, a cleaning mechanism is arranged at the bottom of the explosive injection mechanism, and the outer side of the cleaning mechanism is fixedly connected with the explosive injection mechanism; the medicine injection mechanism comprises a main shell, a medicine storage tank is arranged in the main shell, a cover is arranged on the top of the medicine storage tank, a manual pump is installed on the outer side of the main shell, a handle is installed on the outer side of the manual pump, and a piston rod is fixedly connected to the top of the manual pump. An output port of the piston rod is fixedly connected with the interior of the medicine storage tank, a piston is arranged in the medicine storage tank, the piston rod is fixedly connected with the piston, a medicine conveying pipe is fixedly connected to the bottom of the medicine storage tank, and a handle is fixedly connected to the outer side of the main shell. According to the explosive injection device for static blasting, the operation process is simplified, the explosive waste is reduced, the engineering cost is reduced, the explosive injection efficiency is improved, and the application range is expanded due to the small and portable design of the explosive injection device.

The application relates to a fan maintenance technical field, in particular to a fan transmission system fault feature extraction equipment, which comprises a machine body, a winding mechanism is arranged outside the socket, a feature extraction mechanism is arranged inside the winding mechanism, a position adjusting mechanism is arranged at the bottom of the machine body, the position adjusting mechanism comprises a mounting plate, two hand pump type suction cups are mounted on the mounting plate, an adjusting piece is arranged at the top of the mounting plate, and a limiting piece is arranged on one side of the adjusting piece. Through the cooperation of the mounting plate, the hand pump type suction cup, the rotating disc and the first rotating shaft, when the equipment is placed, the hand pump type suction cup is adsorbed on the plane position, the machine body is supported, the machine body is rotated, the rotating disc is driven to rotate, the operating panel of the machine body is aligned with the position of the eyes of the worker, the first rotating shaft and the fixing block are rotated, the machine body is driven to rotate, the position of the operating panel of the machine body is further adjusted, the machine body is flexibly placed, and the worker can conveniently observe the data displayed on the operating panel of the machine body.

The utility model relates to a hydraulic trolley for transferring a coil, which comprises a trolley body provided with walking wheels, a hydraulic cylinder arranged on the trolley body and a supporting table arranged on an extending shaft of the hydraulic cylinder and used for supporting the coil, the trolley body is further connected with a crank arm inclining towards the side face of the trolley, and the crank arm is provided with a manual pump connected with the hydraulic cylinder. When the coil transfer trolley is used, the trolley body is moved to the position below a coil, then the manual pump is driven to drive the hydraulic cylinder to stretch out, the coil is supported by the supporting table, then the trolley is pulled to drive the coil to be transferred, an operator is located on the side face of the coil through the crank arm, and therefore the operator can conveniently observe the rising condition of the supporting table; and meanwhile, a worker presses a manual pump to drive a hydraulic cylinder to stretch out, so that ascending of the supporting table can be manually controlled, and the ascending stability of the supporting table is enhanced.

The invention relates to a concept for raising the groundwater level from any depth with little electrical energy or potential energy of water. The device comprises two vertical pipelines forming a closed circulation path. And water filled in the two pipelines is in a balanced state. The bottom self-lubricating piston is connected through a smoothly ground piston connecting pipe, and due to the existence of the floater, the bottom self-lubricating piston can easily move up and down in water. Meanwhile, underground water enters through the bottom check valve and flows out through the upper check valve. By means of the model design, even children can easily rotate the hand pump to lift water from any depth. The solar panel is used for operating the direct current motor. The model cost is reduced and the efficiency is improved. In the invention, only little energy is needed, and the device can be used as a hand pump well. The water can circulate and drive the turbine to generate electricity.

The present invention relates to the technical field of pump oil control, and discloses a manual and automatic integrated pump oil control system and method, including: a low oil level alarm module for the storage oil level monitors the oil level in the storage tank in real time, and when it is higher than a preset low oil level, the user selects a manual pump oil mode or an automatic pump oil mode through a manual and automatic pump oil selection module; in the manual pump oil mode, a high oil level alarm module for the fuel oil level monitors the oil level in the fuel tank in real time, and when the oil level is lower than a preset high oil level, it pumps oil according to the user's demand through a manual pump oil module; in the automatic pump oil mode, a fuel supply pump start-stop module monitors the oil level in the fuel tank in real time, and when it is lower than the fuel supply pump start point, it turns on the fuel supply pump, and the automatic pump oil module pumps oil automatically until the oil level is higher than the fuel supply pump stop point and then closes the fuel supply pump to stop pumping oil. The present invention can realize the pump oil function of manual and automatic integration while avoiding the burning of the fuel supply pump and the overflow of the fuel tank, is easy to operate, and has high safety.

The utility model discloses a pressing type multifunctional fixing device which comprises a left adjusting frame and a right adjusting frame, and the angle between the left adjusting frame and the right adjusting frame can be conveniently changed according to the installation angle through the mode that the left adjusting frame and the right adjusting frame are hinged. Meanwhile, the angle between the left adjusting frame and the right adjusting frame can be fixed by screwing a bolt, a lead screw can be conveniently screwed through a lead screw button cap, the position of a hand pump vacuum suction cup can be changed through the lead screw in cooperation with a second sliding block, tiles are adsorbed through the hand pump vacuum suction cup, and the tiles can be propped through a supporting device; and the levelness of the ceramic tile can be observed in an auxiliary mode through the leveling instrument, the position of the threaded supporting column can be changed through the first sliding block which is arranged in a sliding mode, and meanwhile the threaded supporting column can support the threaded supporting column.

The utility model discloses a medical tube air bag inflating and water filling device, and relates to the field of hospital supplies. Comprising a shell, a water storage bottle, a manual pump, a first three-way valve, a second three-way valve, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline and a connector. During inflation, the first three-way valve is adjusted to communicate the second pipeline with the fifth pipeline, and the second three-way valve is adjusted to control the fifth pipeline to communicate with the fourth pipeline; then the hand-held handle operates the manual pump, and air enters the manual pump through the second pipeline, the first three-way valve, the fifth pipeline, the second three-way valve and the fourth pipeline; then the connector is connected with an inflation connector on the medical tube, and the second three-way valve is operated to enable the third pipeline to be communicated with the fourth pipeline; and then the manual pump is operated, and air is output through the fourth pipeline, the second three-way valve, the third pipeline and the connector and is inflated into the air bag. In water filling, the first three-way valve is adjusted to enable the first pipeline to be communicated with the fifth pipeline, and other operations are the same as water filling.

The invention provides a pipeline refueling vehicle. The pipeline refueling vehicle comprises a chassis, a refueling platform, a first hydraulic cylinder, a hand pump and a first pipeline. Wherein the first hydraulic cylinder is arranged on the chassis, connected with the refueling platform and used for lifting the refueling platform; the first pipeline is connected with the first hydraulic cylinder and the hand pump, and the hand pump pumps hydraulic liquid into the first hydraulic cylinder through the first pipeline. By operating the hand pump, hydraulic liquid can be pumped into the first hydraulic cylinder, and the refueling platform is lifted through the first hydraulic cylinder. The hand pump pumps liquid into the first hydraulic cylinder in a mechanical transmission mode and does not depend on a motor, in the process that the refueling platform is used for refueling an airplane, if the pipeline refueling vehicle abnormally flames out and cannot be started, the refueling platform can be rapidly and reliably lifted through the arrangement, and the safety of the refueling platform is improved. The pipeline refueling truck can be rapidly evacuated from the site, the emergency processing capacity of the pipeline refueling truck on the aircraft refueling operation site is improved, and the pipeline refueling truck is convenient to use.

The utility model discloses an electro-hydraulic actuator capable of adjusting slow closing, which comprises an electro-hydraulic actuator, the electro-hydraulic actuator comprises a hydraulic pump system, a hand-operated direction valve and a hand-operated pump control rod, the hand-operated direction valve is rotatably connected to one end of the side edge of the hydraulic pump system, and the hand-operated pump control rod is fixed to the other end of the side edge of the hydraulic pump system; the limiting assembly comprises a spring column, a movable plate, a through hole, a second groove and a limiting block, one end of the spring column is fixed to the side edge of the hydraulic pump system and located on the side edge of the manual reversing valve, the movable plate is fixed to the other end of the spring column, the through hole is formed in the middle of the movable plate, and the second groove is formed in the inner side edge of the through hole; the limiting block is fixed to the side edge of the hand-operated direction valve. The problems that due to the fact that a manual reversing valve is exposed on the outer side of a hydraulic pump system, misoperation is caused, the valve is opened or closed accidentally, normal production is affected, and even safety accidents are caused are solved.

The utility model discloses a drill hole double-plug water pressure test device suitable for irregular hole walls, which comprises a drill rod main body, an internal thread pipe and a hand pump, the internal thread pipe is sleeved with an annular air bag, the lower end of the internal thread pipe is provided with a water outlet pipe, the upper end of the water outlet pipe is in threaded connection with the internal thread pipe, the water outlet pipe is provided with a plurality of water outlet holes, and the hand pump is connected with the water outlet pipe. A threaded sleeve is arranged at the lower end of the water outlet pipe and is in threaded connection with the bottom end of the water outlet pipe, a fixing base is installed at the bottom end of the threaded sleeve, a blocking air bag is installed at the bottom of the fixing base, a connecting hose is communicated between the blocking air bag and the annular air bag, and an air conveying pipe is communicated with the annular air bag; one end of the air delivery pipe away from the annular airbag is fixedly connected with the air outlet end of the hand pump. The device has the beneficial effects that the device is convenient to disassemble and assemble, the size of the device is reduced after the device is disassembled, the device is convenient to store and carry, the water pressure test operation is simpler and more convenient, and the working efficiency is improved.

The utility model discloses a novel integrated mounting bracket assembly, which relates to the technical field of automobile parts and comprises a bent pipe body, the bent pipe body comprises a vertical section, and the upper end and the lower end of the vertical section are bent rightwards to form an upper bent section and a lower bent section respectively; a fender connecting support is arranged in the middle of the upper bent section, and fender connecting supports and air filter connecting supports are arranged at the two ends of the lower bent section. According to the utility model, the air filter, the fender, the manual pump, the voice alarm and the air guide channel connecting bracket are integrated on one bracket, so that the development cost is reduced, meanwhile, the structural design of a vehicle is more compact, and the space is greatly saved.

1. Name of the designed product: hand pump. 2. Use of the designed product: the designed product is used to form a hand pump for fluid under pressure. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

Dispensing device, comprising a bowl-shaped outer container having a bottom and a side wall (2B) having a free end defining an opening into the outer container, the free end being attached to a collar (80); an intermediate member supporting an inner container and a hand pump coupled to the inner container, for dispensing a fluid substance(s) contained therein; removable attachment means (60B) being provided between the collar (80) and the intermediate member, for uncoupling the collar (80) from the intermediate member by taking the inner container and the pump therewith and replacing said intermediate member, container and pump with a new intermediate member with a pump and an inner container filled with the fluid substance by recoupling said new intermediate member, container and pump with the collar (80) and consequently with the outer container.Figure for abstract: Fig. 2.

The invention relates to the technical field of hoisting cranes, in particular to a multipurpose rescue boat telescopic hoisting crane and a control method thereof.The multipurpose rescue boat telescopic hoisting crane comprises a base and is characterized in that a hydraulic pump station is arranged on one side of the base, a slewing bearing is arranged in the center of the top of the base, and an oilless bearing is arranged in the slewing bearing; the top of the rotary bearing is provided with a central rotary joint, the central rotary joint is provided with a rotary speed reducer assembly, and the other side of the rotary speed reducer assembly is provided with an energy storage component. Through the design of the telescopic boom structure and the hydraulic winch, the telescopic boom can adapt to various scenes such as sea rescue and oil field operation, and the functions are more comprehensive; a hydraulic driving and slewing bearing structure is adopted, 360-degree slewing and variable amplitude operation of the hoisting crane is achieved, and the flexibility and accuracy of operation are improved; and an emergency rotation pull rod, an emergency lowering pull rod and an emergency hand pump are arranged, so that manual operation can still be performed when a hydraulic system fails, and the safety and reliability of the equipment are improved.

A kitchen manual pump comprises a pump body, a pump cover, a piston, a handle, a connecting rod and a liquid inlet valve. The piston comprises an upper fixing frame, a water scraping valve and a lower fixing frame; the upper fixing frame and the lower fixing frame are spaced up and down and are connected through a connecting column which is connected with a connecting rod; an upper peripheral gap and a lower peripheral gap are respectively formed between the peripheral walls of the upper fixing frame and the lower fixing frame and the inner wall of the pump cavity, the upper fixing frame is provided with a water passing hole which is through up and down, and a water passing channel is formed between the water passing hole and the lower peripheral gap; the water scraping valve is elastic and annular and can be arranged between the upper fixing frame and the lower fixing frame in a sleeving mode in an up-down moving mode. The outer peripheral wall of the water scraping valve is in interference fit with the inner wall of the pump cavity, the inner peripheral wall is spaced from the outer peripheral wall of the connecting column, and the water scraping valve can move upwards to seal the lower side of the upper peripheral gap and open the water passing channel or move downwards to seal the upper side of the lower peripheral gap and close the water passing channel. The water scraping valve is annular, can be in interference fit with the inner wall of the pump cavity and can move up and down to scrape water, the water scraping effect is good, and the service life is long.