High-pressure cleaning machine gun shutdown switch valve

Abstract

The utility model belongs to the technical field of high-pressure cleaning machines, and relates to a gun shutdown switch valve of a high-pressure cleaning machine, a valve core comprises an ejector pin and a driving seat, the ejector pin slides in a valve seat, the driving seat slides in a valve body, the top of the valve seat is provided with a through hole for the ejector pin to penetrate out, and the penetrating-out end of the ejector pin corresponds to a contact of a microswitch. A sliding ring sliding in the axial direction is arranged on the ejector pin in a sleeved mode, a limiting step matched with the sliding ring is arranged in the valve seat, an annular groove is formed in the inner edge of the bottom of the sliding ring, a first sealing ring is assembled in the annular groove, the sliding ring is in clearance fit with the ejector pin, and the first sealing ring is connected with the ejector pin in a sealed mode. A spring arranged on the ejector pin in a sleeving mode is arranged between the driving base and the sliding ring, the driving base is connected with the valve body in a sealed mode, and a valve cavity below the driving base is communicated with the pump cavity. The gun shutdown switching valve of the high-pressure cleaning machine has the advantages of being simple in structure, low in cost, convenient to install, sensitive in response, small in occupied space and long in service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-pressure cleaning machines and relates to a high-pressure cleaning machine gun stop switch valve. Background Art

[0002] After the existing high-pressure cleaning machine is turned off, the power supply of the motor is not cut off, and the power motor of the high-pressure cleaning machine is still running. At this time, the water flow is circulated in the pump, and the water flow temperature in the pump rises rapidly, which is bound to cause the rubber seal in the pump to overheat and shorten its service life; at the same time, the motor drives the pump to do useless work continuously, generating noise to pollute the environment, wasting electricity and reducing the service life of the whole machine; if the motor needs to stop running when the high-pressure water gun is turned off, the main power switch must be turned off separately; conversely, if the main power is cut off, the main switch must be pressed again after opening the spray gun to start the motor and make the high-pressure cleaning machine work again; this is very inconvenient to use and causes labor waste.

[0003] Chinese utility model CN ​​207823544 U (announcement date: 2018.09.07) discloses a gun shut-down device for a high-pressure cleaning machine, which is provided with a ejector valve cavity, an ejector valve cavity and a cone valve cavity, a valve core ejector, a switch ejector and a water outlet cone valve in a valve body to form a first pressure check valve and a second pressure check valve. When cleaning a machine gun, the water outlet of the cone valve cavity is blocked to form a high pressure inside, and the high pressure is used to push the valve core ejector and the switch ejector in turn to press the micro switch, and the control circuit stops the cleaning machine from working, so as to achieve the purpose of shutting down the gun. This gun shut-down device has a complex structure and high cost. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a high-pressure cleaning machine gun shutdown switch valve, which can cut off the power supply while shutting down the gun, and has the advantages of simple structure, low cost, convenient installation, sensitive response, small space occupation and long service life.

[0005] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0006] A high-pressure cleaning machine gun shutdown switch valve comprises a valve body, a valve seat and a valve core, the valve body is formed on a pump body, an external threaded joint fixedly connected to the valve body is arranged at the bottom of the valve seat, a mounting seat for mounting a micro switch is arranged at the top of the valve seat, the valve core comprises a ejector pin sliding in the valve seat and a driving seat sliding in the valve body, a through hole for the ejector pin to pass through is arranged at the top of the valve seat, the passing end of the ejector pin is arranged corresponding to the contact of the micro switch, a slip ring sliding along the axial direction is sleeved on the ejector pin, a limiting step matching the slip ring is arranged in the valve seat, an annular groove is arranged at the inner edge of the bottom of the slip ring, a first sealing ring is assembled in the annular groove, the slip ring and the ejector pin are clearance-matched, the first sealing ring and the ejector pin are sealingly connected, a spring sleeved on the ejector pin is arranged between the driving seat and the slip ring, the driving seat is sealingly connected to the valve body, and the valve cavity below it is communicated with the pump cavity.

[0007] In the above-mentioned high-pressure cleaning machine gun stop switch valve, an annular groove is provided on the outer peripheral surface of the driving seat, and a sealing component sealedly connected to the valve body is provided in the annular groove.

[0008] In the above-mentioned high-pressure cleaning machine gun stop switch valve, the sealing assembly includes a first sealing ring and a retaining ring, the first sealing ring and the retaining ring are distributed up and down, and the retaining ring axially limits the second sealing ring.

[0009] In the above-mentioned high-pressure cleaning machine gun stop switch valve, a gasket sleeved on the ejector pin is arranged below the slip ring, and the upper and lower surfaces of the gasket are respectively in contact with the first sealing ring and the upper end of the spring. Preferably, in the non-compressed state, the bottom of the first sealing ring slightly exceeds the bottom of the slip ring.

[0010] In the above-mentioned high-pressure cleaning machine gun shutdown switch valve, an enlarged diameter limit ring is provided at the upper end of the driving seat, and when the limit ring contacts the bottom of the valve seat, an axial limit structure for the valve core to move upward is formed. An enlarged diameter spring mounting column is provided at the bottom of the ejector pin, and the outer diameter of the spring mounting column matches the inner diameter of the spring, and the lower end of the spring contacts the upper surface of the limit ring.

[0011] In the above-mentioned high-pressure cleaning machine gun stop switch valve, the ejector pin and the drive seat are integrally formed.

[0012] In the above-mentioned high-pressure cleaning machine gun stop switch valve, a third sealing ring is arranged at the bottom of the limit step, and the third sealing ring is in contact with the upper surface of the slip ring.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model provides a high-pressure cleaning machine gun shutdown switch valve, which does not require the use of complex components such as steel balls, integrates the ejector structure and the drive structure into one, greatly simplifying the existing gun shutdown structure. The utility model can cut off the power supply while shutting down the gun, and has the advantages of simple structure, low cost, easy installation, sensitive response, small space occupation and long service life.

[0015] 2. The utility model further improves the ejector pin guide structure of the switch valve. Through the combination of the sliding ring and the first sealing ring, the ejector pin can slide along the axial direction while being able to move more smoothly and having better sealing performance. The utility model also uses a gasket to compress the first sealing ring to further improve its sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is an axial cross-sectional view of the utility model;

[0018] Figure 3 yes Figure 2 A partial enlarged view of

[0019] Figure numerals: 1. valve seat; 2. external threaded joint; 3. mounting seat; 4. ejector pin; 5. drive seat; 6. slip ring; 7. limiting step; 8. first sealing ring; 9. spring; 10. second sealing ring; 11. retaining ring; 12. gasket; 13. limiting ring; 14. spring mounting column; 15. third sealing ring. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings. Figure 1-3 :

[0021] A high-pressure cleaning machine gun shutdown switch valve comprises a valve body, a valve seat 1 and a valve core, wherein the valve body is formed on a pump body, an external threaded joint 2 fixedly connected to the valve body is arranged at the bottom of the valve seat 1, a mounting seat 3 for mounting a micro switch is arranged at the top of the valve seat 1, the valve core comprises a pin 4 sliding in the valve seat 1 and a driving seat 5 sliding in the valve body, a through hole for the pin 4 to pass through is arranged at the top of the valve seat 1, the passing end of the pin 4 is arranged corresponding to the contact of the micro switch, a slip ring 6 sliding along the axial direction is sleeved on the pin 4, a limiting step 7 matching the slip ring 6 is arranged in the valve seat 1, an annular groove is arranged at the inner edge of the bottom of the slip ring 6, a first sealing ring 8 is assembled in the annular groove, the slip ring 6 and the pin 4 are clearance-matched, the first sealing ring 8 and the pin 4 are sealed, a spring 9 sleeved on the pin 4 is arranged between the driving seat 5 and the slip ring 6, the driving seat 5 is sealed and connected to the valve body, and the valve cavity below it is communicated with the pump cavity.

[0022] The working mode of this embodiment is: when the machine gun is cleaned with high pressure, the pressure in the pump chamber increases sharply, the pump chamber pressure is transmitted to the valve chamber, and the driving seat 5 is pushed to move upward, the driving seat 5 drives the ejector pin 4 to move upward, the slip ring 6 is kept relatively still with the valve seat 1 due to the action of the limit step 7, the ejector pin 4 moves relative to the slip ring 6 along the axial direction defined by the slip ring 6, and at the same time, the spring 9 is compressed, the ejector pin 4 moves upward to act on the contact of the micro switch, and the micro switch turns off the power supply. In this embodiment, the drive structure and the ejector pin 4 structure are integrated into one, which greatly simplifies the structure of the switch valve. The slip ring 6 that matches the clearance of the ejector pin 4 is used to guide the ejector pin 4 axially, and the friction between the slip ring 6 and the ejector pin 4 can be avoided, so that it can slide smoothly. In order to match the clearance between the ejector pin 4 and the slip ring 6, the first sealing ring 8 is further provided in this embodiment to increase the sealing between the ejector pin 4 and the slip ring 6 without affecting the sliding.

[0023] In this embodiment, the sealing structure between the driving seat 5 and the valve body is as follows: an annular groove is provided on the outer peripheral surface of the driving seat 5, and a sealing component sealedly connected to the valve body is provided in the annular groove.

[0024] Furthermore, the sealing assembly includes a first sealing ring 8 and a retaining ring 11 , wherein the first sealing ring 8 and the retaining ring 11 are distributed up and down, and the retaining ring 11 axially limits the second sealing ring 10 .

[0025] A gasket 12 sleeved on the ejector pin 4 is provided below the slip ring 6, and the upper and lower surfaces of the gasket 12 are respectively in contact with the upper ends of the first sealing ring 8 and the spring 9. Preferably, in the non-compressed state, the bottom of the first sealing ring 8 slightly exceeds the bottom of the slip ring 6. The gasket 12 of this embodiment serves as both a mounting structure for the spring 9 and a compression structure for the first sealing ring 8.

[0026] The upper end of the driving seat 5 is provided with an enlarged diameter limit ring 13, and when the limit ring 13 contacts the bottom of the valve seat 1, an axial limit structure for the valve core to move upward is formed. The bottom of the ejector pin 4 is provided with an enlarged diameter spring mounting column 14, and the outer diameter of the spring mounting column 14 matches the inner diameter of the spring 9, and the lower end of the spring 9 contacts the upper surface of the limit ring 13. The limit ring 13 in this embodiment serves as both a mounting structure for the spring 9 and an axial limit structure for the valve core, and the spring mounting column 14 is used to prevent the spring 9 from radially deviating.

[0027] Preferably, the ejector pin 4 and the driving seat 5 are integrally formed.

[0028] A third sealing ring 15 is disposed at the bottom of the limiting step 7 , and the third sealing ring 15 is in contact with the upper surface of the slip ring 6 .

[0029] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-pressure cleaning machine gun stop switch valve, comprising a valve body, a valve seat (1) and a valve core, wherein the valve body is formed on a pump body, an external threaded joint (2) fixedly connected to the valve body is provided at the bottom of the valve seat (1), and a mounting seat (3) for mounting a micro switch is provided at the top of the valve seat (1), characterized in that: The valve core comprises a pin (4) sliding in a valve seat (1) and a driving seat (5) sliding in a valve body. A through hole for the pin (4) to pass through is arranged at the top of the valve seat (1). The passing end of the pin (4) is arranged corresponding to the contact of the micro switch. A slip ring (6) sliding in the axial direction is sleeved on the pin (4). A limiting step (7) matching the slip ring (6) is arranged in the valve seat (1). An annular groove is arranged at the inner edge of the bottom of the slip ring (6). A first sealing ring (8) is installed in the annular groove. The slip ring (6) and the pin (4) are clearance-matched. The first sealing ring (8) and the pin (4) are sealingly connected. A spring (9) sleeved on the pin (4) is arranged between the driving seat (5) and the slip ring (6). The driving seat (5) is sealingly connected to the valve body. The valve cavity below the driving seat (5) is connected to the pump cavity.

2. A high pressure cleaning machine gun stop switch valve according to claim 1, characterized in that: The outer peripheral surface of the driving seat (5) is provided with an annular groove, and a sealing component which is sealingly connected to the valve body is provided in the annular groove.

3. A high pressure cleaning machine gun stop switch valve according to claim 2, characterized in that: The sealing assembly comprises a second sealing ring (10) and a retaining ring (11), wherein the second sealing ring (10) and the retaining ring (11) are distributed vertically, and the retaining ring (11) axially limits the second sealing ring (10).

4. A high pressure cleaning machine gun stop switch valve according to claim 1, characterized in that: A gasket (12) sleeved on the ejector pin (4) is provided below the slip ring (6), and the upper and lower surfaces of the gasket (12) are respectively in contact with the first sealing ring (8) and the upper end of the spring (9).

5. A high pressure cleaning machine gun stop switch valve according to claim 1, characterized in that: The upper end of the driving seat (5) is provided with an enlarged diameter limit ring (13), and when the limit ring (13) contacts the bottom of the valve seat (1), an axial limit structure for the valve core to move upward is formed. The bottom of the ejector pin (4) is provided with an enlarged diameter spring mounting column (14), and the outer diameter of the spring mounting column (14) matches the inner diameter of the spring (9), and the lower end of the spring (9) contacts the upper surface of the limit ring (13).

6. A high pressure cleaning machine gun stop switch valve according to claim 1, characterized in that: The ejector pin (4) and the driving seat (5) are integrally formed.

7. A high pressure cleaning machine gun stop switch valve according to claim 1, characterized in that: A third sealing ring (15) is provided at the bottom of the limiting step (7), and the third sealing ring (15) is in contact connection with the upper surface of the slip ring (6).

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