552 results about "Piston pump" patented technology

A pump system includes a housing defining a first internal volume and a second internal volume, a first piston positioned to separate the first internal volume into a first chamber and a second chamber, a second piston positioned to separate the second internal volume into a third chamber and a fourth chamber, a first inlet check valve configured to permit fluid flow into the first chamber, a second inlet check valve configured to permit fluid flow into the third chamber, a directional control valve (DCV) repositionable between (a) a first position where the DCV is configured to fluidly couple the second chamber to a high pressure fluid source and (b) a second position where the DCV is configured to fluidly couple the fourth chamber to the high pressure fluid source, and a relief valve configured to supply a fluid to the DCV through an orifice to move the DCV.

The invention relates to a reciprocating piston pump (1, 1') with a pump housing (2) through which fluid flows and a pump axis (10), and an axially movable pump piston (19) through which fluid flows, arranged coaxially to two housing-fixed toroidal coils, namely a first toroidal coil (12') and a second toroidal coil (12''), wherein the reciprocating piston pump (1) has two inlet valves, namely a first inlet valve (20') and a second inlet valve (20''), and two outlet valves, namely a first outlet valve (21') and a second outlet valve (21''),wherein the first inlet valve (20') and the first outlet valve (21') are arranged concentrically to the pump axis (10) within the first annular coil (12') and the second inlet valve (20') and the second outlet valve (21') are arranged concentrically to the pump axis (10) within the second annular coil (12''), and the pump piston (19) is guided in a two-part guide sleeve or directly in the pump housing (2) in a two-part displacement chamber.

The invention relates to the technical field of injection molding machine hydraulic control, in particular to an injection molding machine hydraulic pump control system and a control method thereof, and aims to solve the problems of high energy consumption, high cost or poor temperature control of a traditional hydraulic scheme. The system comprises a hydraulic oil tank, a driving unit and an oil way control module. The driving unit comprises a driving motor, and a fixed displacement pump and a plurality of swash plate type variable displacement piston pumps which are driven by the driving motor, and swash plates of the variable displacement pumps can be switched between negative and positive angles so as to adjust the displacement or actively suck oil; the oil way control module is provided with a flow collecting valve set capable of switching flow collecting / independent states of oil outlet ways of the constant displacement pump and the variable displacement pump, the integrated cooling unit forms an independent cooling filtering loop, the temperature and pressure adjusting assembly is combined with a temperature sensor to control temperature and adjust pressure, and the pressure limiting protection valve set is connected with the constant displacement pump and the variable displacement pump. And the pressure limiting protection valve is matched with a pressure sensor to realize overpressure protection. According to the invention, cost and energy saving are both considered, precise temperature control and pressure protection are realized, and system stability and plastic part forming precision are improved.

The invention relates to the technical field of industrial automation, and discloses a multi-mode switching control method for a variable displacement piston pump driven by a servo motor, which comprises the following steps of: acquiring multi-dimensional operation state parameters and load power of a variable displacement piston pump system; performing dynamic mode decomposition on the load power signal, and executing preset state switching compensation mapping to complete mode switching on the basis of the extracted mode characteristics and the current state parameter under the condition of judging that the switching condition is satisfied; executing a corresponding control strategy in the new mode, and dynamically adjusting the pump displacement and the rotating speed of the servo motor through feedback control; and detecting the response and energy efficiency performance of the regulation and control system according to the performance index in the system operation process. By adopting a dynamic mode intelligent switching mechanism, the system can automatically match the optimal operation mode in different working environments, the energy utilization efficiency is greatly improved, and the effects of effectively reducing energy waste and reducing the total energy consumption of the system during stable load or low load operation are achieved.

The invention relates to the technical field of piston pump leaking stoppage, and discloses a flow leaking stoppage device for a piston pump, which comprises a leaking stoppage clamp, the leaking stoppage clamp comprises a first clamp component and a second clamp component which are symmetrically arranged, and the first clamp component and the second clamp component are in a T shape rotating 90 degrees anticlockwise. A vertical pipe and a transverse pipe are clamped in the first clamp component and the second clamp component, inner cavities are formed in the first clamp component and the second clamp component, the inner cavities form a complete closed cavity when the first clamp component and the second clamp component are combined, and a first rubber pad is fixedly connected to the inner ring shell wall of the first clamp component and the inner ring shell wall of the second clamp component. After the inner cavity is filled with cooling water, the leaking stoppage clamp forms a wrapping type cooling clamp, the cooling effect on the pump cavity is achieved, the possibility that the sealing effect is reduced and water leakage is caused due to the fact that the temperature of the pump body is too high and the rubber sealing piece is thermally deformed is reduced, the leakage risk is reduced, and the service life of the piston pump is prolonged.

The application discloses a high-bearing-column-piston pump friction pair friction and wear testing machine, wherein the lower sample is installed on a lower sample clamp, the lower end of the lower sample clamp is provided with a lifting mechanism for driving the vertical movement of the lower sample to make the lower sample contact or separate from the upper sample, and the upper end of the upper sample is connected with a rotary driving device for driving the rotation of the upper sample through an upper sample clamp. The loading of the testing machine is matched with a lead screw through an optimized mechanical structure design, the loading precision is high, the accuracy of experimental results is improved, stepless loading can be realized, and the testing machine is suitable for the friction and wear characteristic research of friction pairs under various pressures; the testing machine is provided with an oil collecting mechanism, the oil at any moment during the experiment can be collected, the change of the physicochemical indexes of the oil during the whole experiment can be detected, and the influence of the change of the physicochemical indexes of the oil on the friction and wear of the friction pair can be accurately analyzed.

The invention belongs to the technical field of equipment special for petrochemical engineering, and particularly relates to the technical field of oil-gas mixture conveying, in particular to an intelligent multiphase booster pump device which is used for pumping a gaseous medium, a liquid medium or a gas-liquid mixed medium. The booster pump comprises a support, a pump driving device and a pump cylinder component. And the booster pump pre-mixes the pumping medium on the basis of adjusting the power of the motor and / or the acting area difference of the two sides of the inner cavity, so that the pumping medium is not subjected to phase splitting within the preset lift. Piston driving is innovatively adopted to achieve oil-gas mixed transportation, compared with an existing mixed transportation pump, the gas carrying amount is larger, the asymmetric piston pumping mode is adopted, and based on the pressure difference of a left cavity and a right cavity in a cylinder, compression and premixing of pumping media are quite efficiently achieved; under the condition that oil-gas separation equipment and heating equipment are not used, the fact that the piston pump with ultrahigh pumping efficiency is used for conveying the oil-gas mixture is achieved, and the pumping efficiency of the oil-gas mixture is greatly improved.

The utility model discloses a novel piston-free pump head which comprises a pump chamber with an opening in the upper end, a resettable pump head body is installed in the pump chamber, a base cover used for being installed on a bottle opening is installed at the upper end of the pump chamber, a first protruding ring is arranged on the inner wall of the base cover, and the first protruding ring abuts against the outer wall of the pump head body. The installation gap between the base cover and the pump head is sealed, the pump head is pressed, air in the pump chamber enters the bottle through the air inlet hole, liquid in the bottle is discharged through the liquid outlet pipe and the pump head, the pump head is loosened, external air enters the pump chamber through the air supply channel, circulation is formed, an additional piston structure is not needed, and on the basis that normal liquid outlet is guaranteed, the working efficiency is improved. The structure is optimized, the production and assembly process is simplified, manufacturing is easier, the piston structure does not need to be damaged in the installation process, and the situation that the sealing effect of the piston structure becomes poor after repeated use, air leakage occurs, and consequently the product function is unstable is avoided.

The utility model relates to a vacuum bottle with a pressing type telescopic pump head, which aims at solving the technical problems that a core head of the existing similar product is difficult to retract and hide after being pressed, sanitation and cleanness of an orifice are difficult to guarantee, and the shape maintenance and the production stability are poor when emulsion is discharged. The telescopic pump head vacuum bottle comprises an inner pipe, an outer pipe, a pressing cap, a piston, a pump core assembly and a liquid outlet nozzle assembly. The liquid outlet nozzle assembly is characterized in that a lower shoulder sleeve at one end of a pipe sleeve of the liquid outlet nozzle assembly is buckled and fixed to the outer pipe, one end of a liquid outlet hole in the pipe sleeve is sleeved with a valve rod extending out of the pump core assembly, the other end of the liquid outlet hole protrudes and is sleeved with a dropper head, and a liquid dropping core buckled and fixed in the liquid outlet hole is arranged at the sleeving position of the dropper head and the liquid outlet hole of the pipe sleeve. The head of the dropping core is inserted into the inner diameter of a dropping hole of the dropper head, the outer diameter of the dropping hole of the dropper head is sleeved with a head cap hole in one end of the head cap, a dropper head spring is arranged on the outer diameter of the dropper head in the head cap, and a transition cavity for pressing the dropping core to stretch out, retract and hide is arranged between the outer diameter of the head of the dropping core in the dropper head and the inner wall of the dropping head.

Apparatus and associated methods relate to using an electro-hydraulic solenoid valve to provide regulation of fluid displacement of a variable-displacement hydraulic pump. A mechanical control mechanism is configured to control displacement of hydraulic fluid pumped from a hydraulic input port to a hydraulic output port. The electro-hydraulic solenoid valve regulates fluid conductivity between a hydraulic output port of the variable-displacement hydraulic pump and a hydraulic control cylinder, which operates a hydraulic control piston coupled to the mechanical control mechanism controlling fluid displacement. An electronic control unit is configured to generate and transmit an electrical control signal to the electro-hydraulic solenoid valve in response to a metric of the variable-displacement hydraulic pump as measured by a transducer. The electronic control unit generates the electrical control signal so as to control the metric measured to within a predetermined control band about a target value.

The invention discloses a quick response reversing assembly applied to a portable air inflation device, relates to the technical field of air inflation devices, and aims at improving a ventilation pipe in the air exhaust action on the basis of the air suction / exhaust action of a piston pump, namely changing the communicating / blocking state in the ventilation pipe through the rotating action of a ventilation rotating ball on the basis of the ventilation rotating ball. On the basis, an improvement scheme about a single-pass ring pipe and a two-pass ring pipe is provided, arc-shaped sliding blocks are arranged in the two-pass ring pipe, when the ventilation rotating ball is switched to block the ventilation pipe, the first arc-shaped sliding block in the single-pass ring pipe accelerates the ventilation rotating ball to recover the blocking action with the high pressure difference as power, and the second arc-shaped sliding block in the two-pass ring pipe accelerates the ventilation rotating ball to block the ventilation pipe. Furthermore, the influence process on the environmental pressure in the dynamic bin when the arc-shaped sliding block I slides is utilized, and a rubber leather sheath arranged in the air vent is utilized to further accelerate plugging, so that the situation that the inflation efficiency is reduced due to high pressure difference is avoided in a high-reaction-capacity action mode; and secondly, the purpose of indirectly controlling the inflation / deflation action is achieved through the two-way ring pipe.

The utility model relates to an automatic turnover device of a black tea fermentation machine, which belongs to the technical field of black tea production and processing and comprises a support frame, a processing cylinder fixedly mounted on the top side of the support frame and a fermentation cylinder fixedly mounted in the processing cylinder, and a turnover mechanism and a watering mechanism are arranged outside the processing cylinder; the turnover mechanism comprises a rotating rod which is rotationally mounted on one side of the processing cylinder and extends into the fermentation cylinder, a stirring plate fixedly welded to the outer surface of the rotating rod, and a driving motor fixedly mounted on the outer wall of one side of the processing cylinder; a plurality of water spraying holes which are formed at equal intervals are formed in the rotating rod; a linkage structure is arranged between the driven gear and the piston pump. According to the automatic turnover device of the black tea fermentation machine, the rotating rod rotates to drive the stirring plate to continuously stir tea leaves in the turnover process, so that the tea leaves are in more sufficient contact with air and fermentation conditions, water can be uniformly sprayed on the tea leaves due to the design of the water spraying holes, and mixing and fermentation of the tea leaves are further promoted.

The present invention relates to a method for coating a lumen of a tube using fluid displacement techniques. A coating solution is introduced into the lumen by positive or negative displacement, excess solution is removed to form a thin film, and the film is subsequently cured. The displacement system may include a piston pump, a peristaltic pump, or a syringe. The method may further allow for multiple coating layers, coating of both inner and outer surfaces, and simultaneous coating of multiple tubes using a manifold.

1. The name of the design product: three-cylinder piston pump. 2. The use of the design product: the pump is used for intermittent oil well operation, such as acidification, well cementing, fracturing, well killing, gravel packing and the like. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

This application relates to the field of rotary piston pump technology, specifically to a rotary piston pump volume adjustment device, a piston pump, and a piston pump injection system. The volume adjustment device includes a frame, a fixed sleeve, a rotating shaft base, and a drive assembly. The fixed sleeve has a connecting structure for engaging with the rotary piston pump head. The rotating shaft base is mounted in a sliding groove on the fixed sleeve. The drive assembly drives the rotating shaft base to reciprocate. In this application, the drive assembly drives the rotating shaft base to reciprocate, causing the fixed sleeve and the pump head on the fixed sleeve to swing back and forth relative to the frame and pump body, thereby changing the tilt angle of the pump head relative to the pump body. This precise mechanical transmission method can accurately control the swing angle of the pump head, thus achieving precise adjustment of the rotary piston pump volume.

The utility model relates to a dust explosion protection system for a chemical workshop. The dust explosion protection system comprises a dust removal assembly and a spraying assembly, the dust removal assembly comprises a dust removal box, an air inlet pipe and an air outlet pipe are connected to the dust removal box, a filter cloth frame and a screen plate are installed on the inner wall of the dust removal box, a plurality of pieces of filter cloth are connected between the filter cloth frame and the screen plate, an exhaust fan is installed in the dust removal box, a transmission rod penetrates through the center of the exhaust fan, and a driving motor is installed on the outer side of the dust removal box; a worm is in butt joint with the driving motor, a turbine is meshed with the worm, and the turbine is in butt joint with the transmission rod; the spraying assembly comprises a piston pump, a water inlet pipe and a water outlet pipe are in butt joint with the piston pump, the piston pump comprises a pump shell, a rotary disc is installed in the pump shell, a connecting rod is hinged to the rotary disc, a piston is hinged to the connecting rod, a rotary shaft penetrates through the center of the rotary disc, a first gear is in butt joint with the rotary shaft, a second gear is meshed with the first gear, and the second gear is in butt joint with a worm. And the driving motor can drive the piston pump to operate while driving the draft fan to operate.

This utility model belongs to the technical field of automotive air suspension systems, specifically relating to an air circuit system for air suspension, which helps to reduce the number of solenoid valves. The air inlet is connected to the piston pump inlet via air passage a, the piston pump outlet is connected to the dryer tank inlet via air passage b, air passage c is provided at the dryer tank outlet, air passage d is connected to the quick-connect fitting of the air tank, air passage d is connected to air passage a via air passage e, air passage d is connected to air passage c via air passage f, air passage g is connected to the quick-connect fitting of the air spring, air passage g is connected to air passage a via air passage h, air passage g is connected to air passage c via air passage i, and air passage c is connected to the exhaust port via air passage j. A solenoid valve I is installed on the valve block to control the switching of air passage h and air passage i with air passage g, respectively; a solenoid valve VI is installed on the valve block to control the switching of air passage e and air passage f with air passage d, respectively; and a solenoid valve VII is installed on the valve block to control the opening and closing of air passage j.

The utility model discloses a piston pump that automatically puts in liquid relates to piston pump technical field, said piston pump that automatically puts in liquid includes shell, piston subassembly and drive subassembly, said shell is equipped with piston chamber and drive chamber inside, said shell is equipped with spacing groove inside, said piston subassembly is equipped with said piston chamber inside, said drive chamber is equipped with said spacing groove inside, said piston subassembly is equipped with said spacing groove inside. The piston assembly is provided with a limiting block, the driving assembly is arranged in the driving cavity and connected with the piston assembly, and when the driving assembly drives the piston assembly to reciprocate in the horizontal direction of the shell, the limiting block reciprocates in the limiting groove so as to limit the piston assembly. According to the piston pump disclosed by the utility model, the piston assembly is limited in the vertical direction through the limiting groove and the limiting block, so that the piston assembly does not shake or displace when moving back and forth in the pump shell, and the stability of the piston assembly moving back and forth in the pump shell is improved.

The invention discloses a piston pump, a brake system and a vehicle. The piston pump comprises a guide structure, a piston body and an anti-torsion structure. The piston body is arranged in the guide structure, and the piston body can move in the axial direction of the piston body relative to the guide structure; the anti-torsion structure is arranged between the piston body and the guide structure, the anti-torsion structure comprises an anti-torsion guide column and an anti-torsion guide groove, and the anti-torsion guide column is arranged on one of the piston body and the guide structure; the anti-torsion guide groove is formed in the other one of the piston body and the guide structure, and the anti-torsion guide column is arranged in the anti-torsion guide groove in a guiding fit mode so as to limit rotation of the piston body in the circumferential direction. And the gap between the anti-torsion guide column and the anti-torsion guide groove in the circumferential direction of the piston body is L, wherein L is larger than 0 and smaller than or equal to R + 0.2 * (N-1). Therefore, the piston body can be prevented from rotating in the circumferential direction, the transmission efficiency and the transmission precision of the piston body are improved, the transmission loss is reduced, the reliability and the stability of the piston pump are improved, and the service life of the anti-torsion structure is prolonged.

The utility model relates to the technical field of valve measurement, and discloses a valve tightness test device, which comprises a test platform and an arranged screw rod, a rotary handle is arranged on the surface of the screw rod, a sealing gasket is additionally arranged at the bottom end of the screw rod, and a test valve is additionally arranged below the sealing gasket; the water outlet end of the water tank is communicated with a first pipeline, the surface of the first pipeline is respectively connected with a piston pump, an overflow valve and a pressure gauge, and the end part of the overflow valve is communicated with a third pipeline; the second pipeline is respectively communicated with the test platform and the first pipeline, and the surface of the second pipeline is connected with an isolation door. According to the valve leakproofness test device, the screw rod is adjusted by rotating the handle, the sealing gasket and the test valve are fixed, the isolation door is opened, the pressure of the overflow valve is set, the piston pump is started for a pressing test, water enters the test platform along the first pipeline and the second pipeline, the overflow valve is automatically started for backflow after the test pressure is reached, and the water flows back to the water tank along the third pipeline.

The invention relates to a cartridge-type electromagnetically actuated double-acting reciprocating piston pump (1), the reciprocating piston pump (1) having a pump axis (10), a pump inlet (5), and a pump outlet (6) and comprising the following: a mounting system (31) which accommodates two coil assemblies (25) of the same design in a stationary manner opposite one another in the axial direction, the first coil assembly (25') having a first annular coil (12') and a first fixed armature (13'), and the second coil assembly (25'') having a second annular coil (12'') and a second fixed armature (13''); a pump piston (19) which integrates the function of an armature and of a delivery piston and is mounted for movement along the pump axis (10) and is arranged radially inside coaxially to the first and second coil assemblies (25', 25''); a first and a second displacement chamber (24', 24''), the volume of which changes when the pump piston (19) in the form of an armature is moved under the effect of the coil assemblies (25); two inlet valves of the same design, specifically a first inlet valve (20') and a second inlet valve (20''); two outlet valves of the same design, specifically a first outlet valve (21') and a second outlet valve (21'').

The application discloses a coal gangue slurry preparation and conveying system and method for goaf filling, which comprises a material crushing system including a storage bin, a vibrating feeder, a multi-stage crushing system, a vibrating screen and a buffer bin; the vibrating feeder is provided with the storage bin in front and the multi-stage crushing system in back; the multi-stage crushing system comprises a plurality of crushing device systems; after being processed by a first set of crushing device systems, the material enters the vibrating screen for screening; the qualified coal gangue powder enters the buffer bin, and the unqualified material enters a second set of crushing device systems for crushing again; a stirring and slurry preparation system is used for stirring and slurry preparation of the material in the buffer bin and then feeding into a pipeline conveying system; the pipeline conveying system is provided with at least two piston pumps, which are aggregated by a shunt valve to a grouting conveying pipeline and then conveyed to a grouting area. Through the integration of the coal gangue slurry preparation and conveying, the underground filling of the goaf and the accumulation of coal-based solid waste are solved.

The utility model discloses veterinary drug liquid preparation filling equipment easy to clean, relates to the technical field of veterinary drug filling equipment, and solves the problems that in the prior art, cleaning of a filling head is time-consuming and labor-consuming, and the utilization rate of the equipment is reduced. Comprising a filling mechanism, the filling mechanism comprises a machine body, filling heads and a piston pump, the piston pump is connected to the upper end of the machine body, the filling heads are connected with a liquid outlet pipe of the piston pump through liquid conveying pipes, a liquid inlet pipe of the piston pump is connected with a cleaning pipe through a three-way valve, and the cleaning pipe communicates with a cleaning agent storage box; the cleaning agent storage box is connected to the upper end of the machine body; a cleaning tank is arranged at the lower end of the filling head, a conveying mechanism is arranged at the lower end of the cleaning tank, and the conveying mechanism corresponds to the filling head. The cleaning device has the beneficial effects that the piston pump and a connecting pipeline of the piston pump can be cleaned, residual liquid medicine in the filling head can be thoroughly cleaned, and the residual liquid medicine is prevented from breeding bacteria.

The utility model discloses an oil injection mechanism of a gear reducer, which comprises an injection gun body, an oil injection pipe, a driving motor, a screw rod and a spiral pipe cavity, one side of the injection gun body is provided with a grip, and a trigger switch is installed for controlling the starting and stopping of the driving motor. An injection conveying pipe is fixedly installed in the oil injection pipe, a spiral pipe cavity is formed in the inner side of the oil injection pipe, the spiral rod is rotationally installed on the injection gun body, and the periphery of the spiral rod abuts against and is meshed with the inner wall of the spiral pipe cavity to form a sealed conveying channel. The single-screw pump conveying principle is adopted, a plurality of independent sealed conveying cavities are formed in the spiral pipe cavity through eccentric rotation of the spiral rod, stable and continuous lubricating oil conveying is achieved, and compared with a traditional piston pump or straight pipe gravity oil injection mode, the flow uniformity is improved, lubricating oil leakage is reduced, energy consumption is reduced, and the service life of the lubricating oil pump is prolonged. The utility model is suitable for the fields of gear reducers, industrial equipment lubricating systems and the like.

This invention discloses a closed-loop hydraulic piston pump with high variable response speed and its usage method. The variable system of the piston pump consists of a control valve and a variable mechanism. The variable mechanism includes a variable cylinder (10), a variable piston (11) is provided inside the variable cylinder (10), the middle part of the variable piston (11) is connected to the swashplate (40) of the piston pump, and both ends of the variable piston (11) form variable chambers (12). Both ends of the variable piston (11) are provided with copper rings (13), which are located between the variable piston (11) and the variable cylinder (10). The variable cylinder (10) supports and seals the variable piston (11) through the copper rings (13), and the copper rings (13) are clearance-fitted with the variable piston (11). This invention has the advantage of fast variable response speed.

The invention discloses a piston pump and a clothes processing device, the piston pump comprises a pump body, a piston and a driving assembly, the pump body is of an integrated structure, and the pump body is provided with a piston cavity; the piston is arranged in the piston cavity in a reciprocating sliding mode in the axial direction of the piston cavity. The driving assembly is connected to the pump body, and part of the driving assembly extends into the piston cavity so as to drive the piston to slide in a reciprocating mode. The pump head is connected to the pump body and provided with a liquid outlet and a liquid inlet which are both communicated with the piston cavity. The pump body is of the integrated structure and is provided with the piston cavity, connecting points can be reduced, and therefore possible leakage points and fault points are reduced, the pump body can bear longer-time use, and the stability and reliability of the whole structure of the piston pump are improved. And one part of the pump body is used as a mounting part of the driving assembly, so that the number of parts of the piston pump is reduced, and the assembly process is simplified.

The invention discloses an agricultural plunger pump, and relates to the technical field of agricultural plunger pumps, the agricultural plunger pump realizes self-cleaning of a filter screen II through ball valve switching, has no complex electrical control, is suitable for agricultural environment use, can prevent the filter screen II from being blocked through regular back flushing, and improves long-term working efficiency, and multiple layers of filter screen plates are arranged in a filter screen cylinder and are arranged in a stepped manner, so that the filter screen cylinder is convenient to clean. Meshes are reduced layer by layer, large-particle impurities are blocked by the first-layer filter screen, fine particles are intercepted by the subsequent filter screens, and the problems that the load of a single filter screen is too large, water flow pressure disappears after flushing is completed, a compressed spring pushes a movable column to rebound, a baffle rapidly closes an inlet groove, physical sealing is formed, and a filter screen cylinder can be detached and cleaned at regular intervals are solved. And the auxiliary cylinder can be synchronously cleaned through thread disassembly, the overall service life is prolonged, smooth water inlet is ensured through the clean filter screen II, continuous flow and pressure output can be realized, and the irrigation efficiency is ensured.

A piston pump for a high pressure cleaning device is provided, having a pump housing, which includes a first housing part and a second housing part. The first housing part forms a suction conduit and a pressure conduit, and the second housing part forms a plurality of pump chambers each in flow connection with the suction conduit by an inlet channel and with the pressure conduit by way of an outlet channel. The first insert part includes an inlet valve seat and a guide member arranged offset from said inlet valve seat. The inlet closing body includes an inlet valve stem that adjoins the inlet valve plate and is displaceably mounted on the guide member. The first insert part includes an annular inlet valve seat body that points toward the pump chamber and forms the inlet valve seat, wherein the guide member is arranged upstream of the inlet valve seat.

The invention provides a functional liquid quantitative adding device, and belongs to the technical field of smart home. The functional liquid quantitative adding device comprises a liquid storage container, a one-way valve system and a water tank, the liquid storage container is of a double-layer vacuum structure, and a vacuum inner bag is arranged in the liquid storage container. The upper port of the liquid storage container is connected with a piston pump through a detachable structure, and the extraction end of the piston pump extends to the vacuum inner bag; the first one-way valve is arranged at the extraction end of the piston pump, and the second one-way valve is installed at the liquid discharging end of the piston pump. A tank cover is clamped to an opening of the water tank in a sealed mode, the piston pump is installed in the tank cover, and a stirrer is installed at the bottom of the water tank. By means of the comprehensive design of accurate quantification, convenient operation, sealed preservation and universal adaptation, the problems that a traditional adding mode is tedious in operation and inaccurate in proportion are perfectly solved, and an efficient and reliable cleaning solution adding solution is provided for household cleaning equipment.