CN215613509U - Low-pressure-maintaining switch valve for cleaning machine - Google Patents
Low-pressure-maintaining switch valve for cleaning machine Download PDFInfo
- Publication number
- CN215613509U CN215613509U CN202120689763.7U CN202120689763U CN215613509U CN 215613509 U CN215613509 U CN 215613509U CN 202120689763 U CN202120689763 U CN 202120689763U CN 215613509 U CN215613509 U CN 215613509U
- Authority
- CN
- China
- Prior art keywords
- valve
- cavity
- pressure
- switch valve
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model belongs to the technical field of cleaning machines, and particularly relates to a low-pressure-maintaining switch valve used in a cleaning machine. The water pump comprises a pump head, wherein a water inlet and a water outlet are arranged on the pump head, a pressure regulating unloading valve, a switch valve and a check valve are arranged on the pump head, and a water inlet cavity, a pump cavity and a water outlet cavity are arranged in the pump head; the check valve is arranged at the water outlet; a pressure relief channel is also opened between the water inlet cavity and the pump cavity, and a pressure regulating unloading valve is arranged at the pressure relief channel; the switch valve comprises a switch valve cavity, a switch valve rod and a switch valve spring are movably arranged in the switch valve cavity, one end of the switch valve cavity is connected with the pump cavity, the other end of the switch valve cavity is connected with the water outlet cavity through a secondary pressure relief channel, and the pump cavity and the water outlet cavity are separated through a secondary pressure relief rod and a pressure relief sealing ring. The novel electric water gun has the advantages that when the gun is started next time, the pressure in the water outlet cavity is released quickly, the starting load of the motor is small, and the motor is easy to start.
Description
Technical Field
The utility model belongs to the technical field of cleaning machines, and particularly relates to a low-pressure-maintaining switch valve used in a cleaning machine.
Background
High pressure cleaning machine that uses in the existing market has generally all adopted high pressurize unloading valve structure, also has begun to be equipped with automatic switch structure on some high pressure cleaning machines, can realize closing the rifle shutdown function, wherein mostly adopted micro-gap switch to realize, but the gun shutdown structure of high pressure cleaning machine pump among the prior art has certain design defect, easily causes the motor to start the difficulty, influences high pressure cleaning machine, squirt, high-pressure tube life-span.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the low-pressure-retaining switch valve which has a simple structure, secondarily relieves the pressure of the load in the pump, ensures that the water outlet cavity is in a low-pressure-retaining strong state, ensures that the load in the pump is very small, the motor is started under ultra-low load, has the functions of quickly stopping the gun closing motor and having high sensitivity in starting the gun, and has short action time of an unloading valve, thereby prolonging the service lives of a pump head, the motor, a microswitch, a water gun and a high-pressure pipe, reducing the power consumption and being used for a cleaning machine.
The purpose of the utility model is realized as follows:
a low-pressure-maintaining switch valve used in a cleaning machine comprises a pump head, wherein a water inlet and a water outlet are arranged on the pump head, a pressure-regulating unloading valve, a switch valve and a check valve are arranged on the pump head, and a water inlet cavity, a pump cavity and a water outlet cavity are arranged in the pump head; the check valve is arranged at the water outlet;
a pressure relief channel is also opened between the water inlet cavity and the pump cavity, and a pressure regulating unloading valve is arranged at the pressure relief channel; the switch valve comprises a switch valve cavity, a switch valve rod and a switch valve spring are movably arranged in the switch valve cavity, one end of the switch valve cavity is connected with the pump cavity, the other end of the switch valve cavity is connected with the water outlet cavity through a secondary pressure relief channel, and the pump cavity and the water outlet cavity are separated through a secondary pressure relief rod and a pressure relief sealing ring.
Furthermore, the switch valve rod is provided with an inclined surface, and the inclined surface is positioned at the end of the secondary pressure relief channel.
Furthermore, the inner wall of the switch valve cavity is provided with a sealing groove, a pressure relief sealing ring is arranged in the sealing groove, and the pressure relief sealing ring is sleeved on the switch valve rod.
Further, the other end of the switch valve rod is provided with a microswitch for controlling the motor.
Furthermore, the upper end of the switch valve rod is sleeved with a sealing ring.
The pressure regulating and unloading valve further comprises a valve shell, an unloading valve core, a valve seat, an unloading valve spring and a pressure regulating knob, wherein the unloading valve core is arranged in the valve shell, the lower end of the unloading valve core is provided with a plug, the valve seat is arranged at a channel opening of a pressure relief channel, the plug is abutted against the valve seat and blocks the pressure relief channel, the upper end of a valve rod of the unloading valve is provided with the unloading valve spring, the other end of the unloading valve spring is abutted against the inside of the pressure regulating knob, and the pressure regulating knob is rotated to compress the unloading valve spring.
The utility model further discloses a water flow groove is formed in the middle section of the valve casing, a backflow hole is formed in the water flow groove, the backflow hole is communicated with the interior of the valve casing, a backflow channel corresponding to the backflow hole is formed in the pump head, one end of the backflow channel is communicated with the water outlet, water in the water outlet can flow into the valve casing through the backflow channel and the backflow hole and is in contact with the valve core of the unloading valve, sealing rings are arranged on the upper side and the lower side of the water flow groove, and valve core sealing rings are arranged on the upper end and the lower end of the valve core of the unloading valve.
Furthermore, the valve core of the unloading valve is formed with a pressure relief slope, and when the water pressure of the water in the valve shell is increased, the water in the valve shell exerts force on the pressure relief slope to drive the valve core of the unloading valve to move upwards.
Furthermore, the pressure regulating knob is internally provided with an internal thread connected with the valve shell, and the pressure regulating knob is rotated to move up and down, so that the compression amount of the unloading valve spring can be controlled.
Furthermore, an intermediate piece is arranged between the adjusting knob and the unloading valve spring, and the adjusting knob is in contact with the unloading valve spring through the intermediate piece.
Compared with the prior art, the utility model has the outstanding and beneficial technical effects that:
the utility model relates to a low pressure maintaining switch valve on a high-pressure washer pump, which is mainly used for pressurizing low-pressure water into high-pressure water and spraying the high-pressure water to wash articles. The main structure has included the pump head, has water inlet and delivery port on the pump head, and the pump head is inside still to divide into intake antrum, pump chamber and play water cavity, and the water inlet is the intake antrum to the check valve that intakes, and the check valve that intakes is the pump chamber to the delivery port, and the check valve is play water cavity to the delivery port, is provided with a plurality of reciprocating motion's plunger in the pump chamber, and the plunger can form a vacuum low-pressure chamber at reciprocating motion's in-process, the pump chamber can be followed the intake antrum and inhaled water, the piston is the forward motion again, discharges the water of pump intracavity fast, forms the water under high pressure through the spray gun throttle, because these water can not rethread check valve enter into the intake antrum, can only follow the delivery port blowout, and spun water is the water under high pressure.
In order to prevent the water pressure in the pump cavity from being overlarge, a pressure relief channel is further arranged between the pump cavity and the water inlet cavity, a pressure regulating unloading valve is arranged at the pressure relief channel, and the pressure relief channel is blocked by the pressure regulating unloading valve. When the valve outside the water outlet of the pump head is closed, water in the water outlet cannot be discharged, at the moment, the water in the water outlet enters the valve shell through the backflow channel and the backflow hole, the water pressure in the water outlet cavity and the pump cavity is gradually increased, the acting force generated by the cross-sectional area difference of the valve core of the unloading valve can overcome the elastic force of the spring of the unloading valve, the valve core of the unloading valve moves upwards, the pressure relief channel is firstly opened during the upward movement of the valve core of the unloading valve, so that high-pressure water in the pump cavity flows into the water inlet cavity to play a role of first pressure relief, after the first pressure relief is finished, the pressure in the pump cavity is reduced, the water outlet cavity still is in a relatively high-pressure state due to the action of the check valve, the water in the water outlet cavity can enter the secondary pressure relief cavity through the secondary pressure relief channel, two ends of the secondary pressure relief cavity are respectively communicated with the pump cavity and the water outlet cavity, and when the water pressure of the water outlet cavity is greater than the water pressure in the pump cavity, high-pressure water in the secondary pressure relief cavity can overcome the secondary pressure relief spring and drive the secondary pressure relief rod to move backwards, the secondary pressure relief rod moves backwards to close the micro switch, so that a motor in the cleaning machine is closed, and when acting force of water pressure in the water outlet cavity on a valve core of the unloading valve is balanced with spring force of the unloading valve, a low pressure maintaining function is achieved, no pressure exists in a pump cavity, and the pump head is small in load due to the fact that pressure in the water outlet cavity is small. When the gun is started next time, the pressure in the water outlet cavity is released quickly, the starting load of the motor is small, and the motor is easy to start. When the valve outside the water outlet of the pump head is opened, water at the water outlet and in the water outlet cavity flows out firstly, the pressure in the water outlet cavity is reduced, the secondary pressure relief spring pushes the secondary pressure relief rod forwards, the end part of the valve core of the unloading valve pushes the micro switch, and the motor is turned on again to work.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a partial cross-sectional view of the present invention.
Fig. 3 is an internal structural view of the present invention.
Fig. 4 is a front view of the present invention.
Fig. 5 is a cross-sectional view a-a of fig. 4.
Fig. 6 is one of the side views of the present invention.
Fig. 7 is a cross-sectional view of-B in fig. 6.
Fig. 8 is a second side view of the present invention.
Fig. 9 is a cross-sectional view of C-C in fig. 8.
FIG. 10 is a schematic diagram of the pressure regulating unloader valve of the present invention.
FIG. 11 is an exploded view of the pressure regulating unloader valve of the present invention.
Fig. 12 is a schematic view of the structure of the on-off valve of the present invention.
Fig. 13 is an exploded view of the on-off valve of the present invention.
The reference numerals in the figures denote the meanings:
1-pump head; 2-a water inlet; 3-water outlet; 4-pressure regulating unloading valve; 5-a switch valve; 6-check valve; 7-valve casing; 8-valve core of the unloading valve; 9-valve seat; 10-an unloader valve spring; 11-a pressure regulating knob; 12-plug; 13-a pressure relief channel; 14-a water flow trough; 15-a reflow hole; 16-a return channel; 17-pressure relief slope; 18-an interposer; 19-opening and closing the valve cavity; 20-switching the valve stem; 21-a switch valve spring; 22-pressure relief sealing ring; 23-inclined plane; 24-a seal groove; 25-a microswitch; 26-secondary pressure relief channel.
Detailed Description
The utility model is further described below with reference to specific examples:
a low-pressure-maintaining switch valve used in a cleaning machine comprises a pump head 1, wherein a water inlet 2 and a water outlet 3 are arranged on the pump head 1, a pressure-regulating unloading valve 4, a switch valve 5 and a check valve 6 are arranged on the pump head 1, and a water inlet cavity, a pump cavity and a water outlet cavity are arranged in the pump head 1; the check valve 6 is arranged at the water outlet 3;
The utility model relates to a low-pressure-maintaining switch valve used in a cleaning machine, which mainly comprises a pump head 1, wherein the pump head 1 is provided with a water inlet 2 and a water outlet 3, the interior of the pump head 1 is further divided into a water inlet cavity, a pump cavity and a water outlet cavity, a plurality of plungers capable of reciprocating are arranged in the pump cavity, a motor drives the plungers to reciprocate, a negative pressure is formed in the reciprocating process, a water inlet one-way valve is opened, water is sucked from the water inlet 2, the plungers move forwards again, a water outlet one-way valve is opened, the water passes through the pump cavity of a low-pressure-maintaining unloading valve and a check valve 6 and is discharged from the water outlet 3, and finally, a high-pressure water jet is generated through the throttling of a high-pressure pipe and a high-pressure water gun nozzle.
In order to prevent the water pressure in the pump cavity from being overlarge, a pressure relief channel is further arranged between the pump cavity and the water inlet cavity, a pressure regulating unloading valve 4 is arranged at the pressure relief channel 13, and the pressure relief channel 13 is blocked by the pressure regulating unloading valve 4. When the valve outside the water outlet 3 of the pump head 1 is closed, water in the water outlet 3 cannot be discharged, at the moment, the water in the water outlet enters the valve shell 7 through the backflow channel 16 and the backflow hole 15, the water pressure in the water outlet cavity and the pump cavity is gradually increased, and the elastic force of the unloading valve spring 10 can be overcome through the acting force generated by the sectional area difference of the valve core 8 of the unloading valve,
the valve core 8 of the unloading valve is enabled to move upwards, in the process that the valve core 8 of the unloading valve moves upwards, the pressure relief channel is opened firstly, high-pressure water in the pump cavity flows into the water inlet cavity to play a role of first pressure relief, after the first pressure relief is finished, the pressure in the pump cavity is reduced, the water outlet cavity is still in a relatively high-pressure state due to the action of the check valve 6, water in the water outlet cavity enters the switch valve cavity 19 through the secondary pressure relief channel 26, two ends of the switch valve cavity 19 are respectively communicated with the pump cavity and the water outlet cavity, when the water pressure of the water outlet cavity is greater than the water pressure in the pump cavity, the high-pressure water in the switch valve cavity 19 overcomes the switch valve spring 21 and drives the switch valve rod 20 to move backwards, the switch valve rod 20 moves backwards to close the micro switch 25, so that a motor in the cleaning machine is closed, when the acting force of the water pressure in the water outlet cavity on the valve core 8 of the unloading valve is balanced with the force of the spring 10 of the unloading valve, so as to play a role of low pressure maintaining, the pump cavity has no pressure, and the pump head 1 has small load due to small pressure in the water outlet cavity. When the gun is started next time, the pressure in the water outlet cavity is released quickly, the starting load of the motor is small, and the motor is easy to start.
During operation, when the pump normally works, the check valve 6 is opened, water enters the water outlet 3 from the pump cavity of the pump head 1 through the check valve 6 and is sprayed out through the high-pressure pipe and the spray gun. When the spray gun is closed, the pressure of the water outlet 3 is increased, the valve core 8 of the unloading valve moves upwards, the plug 12 at the lower end of the valve core 8 of the unloading valve is separated from the hole of the valve seat 9, the pump cavity is communicated with the water inlet cavity, the pressure in the inner cavity of the pump head 1 is rapidly reduced, the check valve 6 is closed to separate the pump cavity from the water outlet cavity, high-pressure water in the water outlet cavity flows into the switch valve cavity 19 from the secondary pressure relief channel 26 due to pressure difference between the water outlet cavity and the pump cavity, and the high-pressure water in the switch valve cavity 19 overcomes the switch valve spring 21 and drives the switch valve rod 20 to move backwards due to the pressure difference, so that the pressure in the water outlet cavity is reduced, secondary pressure relief is completed, meanwhile, the end part of the switch valve rod 20 is separated from the micro switch 25, the working power supply of the motor is cut off, and the low pressure maintaining pressure of the water outlet 3 is maintained. When the spray gun is opened again, the pressure of the water outlet 3 is released, the valve core 8 of the unloading valve is reset under the action of the pressure relief spring, and meanwhile, the lower end of the plug 12 props against the hole 9 of the valve seat.
Furthermore, the middle section of the valve casing 7 is provided with a water flow groove 14, the water flow groove 14 is provided with a backflow hole 15, the backflow hole 15 is communicated with the inside of the valve casing 7, the pump head 1 is provided with a backflow channel 16 corresponding to the backflow hole 15, one end of the backflow channel 16 is communicated with the water outlet 3, water in the water outlet 3 can flow into the valve casing 7 through the backflow channel 16 and the backflow hole 15 and is contacted with the unloading valve core 8, the upper side and the lower side of the water flow groove 14 are both provided with sealing rings, and the upper end and the lower end of the unloading valve core 8 are provided with valve core sealing rings.
Further, the valve core 8 of the unloading valve is formed with a pressure relief slope 17, and when the water pressure in the valve housing 7 increases, the water in the valve housing 7 exerts a force on the pressure relief slope 17 to drive the valve core 8 of the unloading valve to move upwards.
Further, the pressure adjusting knob 11 has an internal thread connected to the valve housing 7 therein, and the pressure adjusting knob 11 is rotated to move up and down, thereby controlling the compression amount of the unloading valve spring 10. The tighter the unloading valve spring 10 is compressed, the greater the force required to overcome the elastic force of the unloading valve spring to drive the unloading valve core 8 to move, the simple structure and the convenient adjustment.
Furthermore, an interconnecting piece 18 is arranged between the adjusting knob and the unloading valve spring 10, and the adjusting knob is in contact with the unloading valve spring 10 through the interconnecting piece 18. The connecting piece 18 can be in more stable contact with the adjusting knob and the unloading valve spring 10, and the adjustment is not easy to generate deviation.
Further, the switch valve 5 comprises a switch valve cavity 19, a switch valve rod 20 and a switch valve spring 21 are movably arranged in the switch valve cavity 19, one end of the switch valve cavity 19 is connected with the pump cavity, the other end of the switch valve cavity is connected with the water outlet cavity through a secondary pressure relief channel 26, and the pump cavity and the water outlet cavity are separated through a secondary pressure relief rod and a pressure relief sealing ring 22. An inclined surface 23 is formed on the secondary pressure relief rod, and the inclined surface 23 is positioned at the end of the secondary pressure relief channel 26.
Further, the inner wall of the switch valve cavity 19 is provided with a sealing groove 24, a pressure relief sealing ring 22 is arranged in the sealing groove 24, and the pressure relief sealing ring 22 is sleeved on the switch valve rod 20. The other end of the switch valve rod 20 is provided with a micro switch 25 for controlling the motor.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered by the protection scope of the utility model.
Claims (9)
1. A low-pressure-maintaining switch valve for use in a cleaning machine, characterized by: the water pump comprises a pump head, wherein a water inlet and a water outlet are arranged on the pump head, a pressure regulating unloading valve, a switch valve, a microswitch and a check valve are arranged on the pump head, and a water inlet cavity, a pump cavity and a water outlet cavity are arranged in the pump head; the check valve is arranged at the water outlet;
a pressure relief channel is also opened between the water inlet cavity and the pump cavity, and a pressure regulating unloading valve is arranged at the pressure relief channel; the switch valve comprises a switch valve cavity, a switch valve rod and a switch valve spring are movably arranged in the switch valve cavity, one end of the switch valve cavity is connected with the pump cavity, the other end of the switch valve cavity is connected with the water outlet cavity through a secondary pressure relief channel, and the pump cavity and the water outlet cavity are separated through a secondary pressure relief rod and a pressure relief sealing ring.
2. A low-pressure maintaining switch valve for use in a washing machine according to claim 1, characterized in that: the switch valve rod is formed with an inclined plane, and the inclined plane is located at the end of the second-stage pressure relief channel.
3. A low-pressure maintaining switch valve for use in a washing machine according to claim 2, characterized in that: the inner wall of the switch valve cavity is provided with a sealing groove, a pressure relief sealing ring is arranged in the sealing groove, and the pressure relief sealing ring is sleeved on the switch valve rod.
4. A low-pressure maintaining switch valve for use in a washing machine according to claim 3, characterized in that: and a sealing ring is sleeved at the upper end of the switch valve rod.
5. A low-pressure maintaining switch valve for use in a washing machine according to any one of claims 1 to 4, characterized in that: pressure regulating relief valve includes valve casing, off-load valve case, disk seat, off-load valve spring and pressure regulating knob, the off-load valve case set up in the valve casing, the lower extreme of off-load valve case is provided with the end cap, and the disk seat sets up in pressure relief channel's entrance, the end cap supports on the disk seat and plugs up pressure relief channel, the upper end of off-load valve rod is provided with the off-load valve spring, the other end of off-load valve spring support in inside the pressure regulating knob, rotate the pressure regulating knob can compress the off-load valve spring.
6. A low pressure maintaining switch valve for use in a washing machine according to claim 5, characterized in that: the water flow groove has been seted up in the middle section of valve casing, has seted up the backward flow hole on the water flow groove, in backward flow hole intercommunication valve casing, seted up on the pump head with the backward flow channel that the backward flow hole corresponds, backward flow channel one end is linked together with the delivery port, in the intraoral water accessible backward flow channel of delivery port, the backward flow hole flow in the valve casing and with the contact of off-load valve case, the upper and lower both sides in water flow groove all are equipped with the sealing washer, and the upper and lower both ends of off-load valve case are provided with the case sealing washer.
7. The low-pressure-maintaining switching valve for use in a washing machine according to claim 6, characterized in that: the valve core of the unloading valve is formed with a pressure relief inclined surface, and when the water pressure of water in the valve shell is increased, the water in the valve shell can apply force on the pressure relief inclined surface to drive the valve core of the unloading valve to move upwards.
8. A low-pressure maintaining switch valve for use in a washing machine according to claim 7, characterized in that: the pressure regulating knob is internally provided with an internal thread connected with the valve shell, and the pressure regulating knob is rotated to move up and down, so that the compression amount of the unloading valve spring can be controlled.
9. A low-pressure maintaining switch valve for use in a washing machine according to claim 8, characterized in that: and an interconnecting piece is arranged between the adjusting knob and the unloading valve spring, and the adjusting knob is contacted with the unloading valve spring through the interconnecting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120689763.7U CN215613509U (en) | 2021-04-06 | 2021-04-06 | Low-pressure-maintaining switch valve for cleaning machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120689763.7U CN215613509U (en) | 2021-04-06 | 2021-04-06 | Low-pressure-maintaining switch valve for cleaning machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215613509U true CN215613509U (en) | 2022-01-25 |
Family
ID=79935348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120689763.7U Active CN215613509U (en) | 2021-04-06 | 2021-04-06 | Low-pressure-maintaining switch valve for cleaning machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215613509U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115007530A (en) * | 2022-06-15 | 2022-09-06 | 宁波富斯乐机械制造有限公司 | Pressure regulating type high-pressure water cleaning machine and pressure regulating method thereof |
-
2021
- 2021-04-06 CN CN202120689763.7U patent/CN215613509U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115007530A (en) * | 2022-06-15 | 2022-09-06 | 宁波富斯乐机械制造有限公司 | Pressure regulating type high-pressure water cleaning machine and pressure regulating method thereof |
| CN115007530B (en) * | 2022-06-15 | 2024-01-05 | 宁波富斯乐机械制造有限公司 | Pressure regulating type high-pressure water cleaning machine and pressure regulating method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5529460A (en) | Pressure washer with flow control switch | |
| CN215613509U (en) | Low-pressure-maintaining switch valve for cleaning machine | |
| CN211678333U (en) | Automatic starting and stopping mechanism of high-pressure cleaning machine | |
| CN212397064U (en) | High-pressure cleaning machine gun unloading stop device | |
| CN209129801U (en) | A kind of plunger pump, motor pump unit and high-pressure cleaning device | |
| CN208858569U (en) | A kind of single screw compressor control discharge time structure | |
| CN214579109U (en) | Low-pressure-maintaining unloading valve for high-pressure cleaning machine | |
| CN215719174U (en) | Novel oil sprayer | |
| CN212406998U (en) | Pump head of high-pressure cleaning machine | |
| CN213792275U (en) | Spray gun for high-pressure cleaning machine | |
| CN201267810Y (en) | High-pressure cleaner | |
| CN210058676U (en) | Airless spraying machine | |
| CN211587707U (en) | High-pressure cleaning machine capable of being started without load and started and stopped automatically | |
| CN215566529U (en) | Cleaning pump with gun closing and stopping functions | |
| CN210386764U (en) | Pressure-adjustable high-pressure cleaning machine | |
| CN112066018A (en) | Valve for shower head | |
| CN111594424B (en) | Pump head of high-pressure cleaning machine | |
| CN216867675U (en) | External pressure switch valve | |
| CN217842689U (en) | Start and stop device in high pressure cleaner | |
| CN2573098Y (en) | Pressure switch for cleaner | |
| CN213870234U (en) | Improved generation high pressure cleaner pump | |
| CN216279595U (en) | Overflow valve mechanism for prolonging service life of high-pressure cleaning machine by changing pressure relief mode | |
| CN213899251U (en) | Magnetic control start-stop switch for pressure pump | |
| CN2343438Y (en) | Liquid controlled unloader with pressure limiting function | |
| CN212690970U (en) | Open exhaust structure who stops switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |