Pressure regulating valve structure of high-pressure cleaning machine

Abstract

The utility model belongs to the technical field of high-pressure cleaning machines, and relates to a pressure regulating valve structure of a high-pressure cleaning machine, which comprises a valve body, a valve core, a valve seat and a pressure regulating nut, the valve core is arranged in the valve body in a sliding manner, the bottom of the valve core is provided with a ball head matched with the valve seat in a sealing manner, and the pressure regulating nut is adjustably screwed at the top end of the valve body. A pressure adjusting spring is arranged between the pressure adjusting nut and the valve element, a ceramic ball body is embedded in the end of the ball head, a ceramic sleeve is embedded in the valve seat, and a sealing structure is formed when the ceramic ball body abuts against the ceramic sleeve. The pressure regulating valve structure of the high-pressure cleaning machine has the advantages of being simple in structure 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 pressure regulating valve structure of a high-pressure cleaning machine. Background Art

[0002] The pressure regulating valve is an essential component of a high-pressure cleaner. During the long-term use of the high-pressure cleaner, the starting frequency of the pressure regulating valve is very high, which can easily cause damage to the pressure regulating valve and affect the life of the high-pressure cleaner.

[0003] Chinese utility model patent CN 214092173 U (announcement date: 2021.08.31) discloses a high-efficiency and long-life three-cylinder high-pressure plunger pump, including a pump body and a crankcase body, the pump body and the crankcase body are sealed, the crankcase body is a three-cylinder high-pressure plunger oil tank and is driven by a motor. A number of water inlet valves, a number of water outlet valves, a pressure regulating valve, an easy-start valve and a gun-off valve are arranged in the pump body. The utility model realizes the output and pressure regulation process of the high-pressure water source through the cooperation of the water inlet valve, the water outlet valve, the pressure regulating valve and the ceramic spray plunger. The ball head at the front end of the pressure regulating valve adopts a composite ceramic ball head, and the pressure regulating valve core and the inside of the pressure regulating valve body are sealed by an O-ring and a buffer gasket, which effectively improves the service life of the pressure regulating valve. Although the pressure regulating valve adopts a composite ceramic ball head, it still does not solve the problem that the valve seat is easily damaged. During long-term use, the valve seat will affect the overall sealing of the regulating valve due to wear. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a pressure regulating valve structure of a high-pressure cleaning machine, which has the advantages of simple structure 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 pressure regulating valve structure for a high-pressure cleaning machine comprises a valve body, a valve core, a valve seat and a pressure regulating nut, wherein the valve core is slidably arranged in the valve body, a ball head which cooperates with the valve seat for sealing is arranged at the bottom of the valve core, the pressure regulating nut is adjustably screwed to the top of the valve body, a pressure regulating spring is arranged between the pressure regulating nut and the valve core, a ceramic sphere is embedded in the end of the ball head, a ceramic sleeve is embedded in the valve seat, and a sealing structure is formed when the ceramic sphere and the ceramic sleeve collide with each other.

[0007] In the above-mentioned pressure regulating valve structure of a high-pressure cleaning machine, the valve seat is coaxially arranged with the ceramic sleeve, the valve seat includes a sleeve mounting portion at the upper end and an internal threaded portion at the lower end, the ceramic sleeve is embedded in the sleeve mounting portion, and the bottom of the sleeve mounting portion is provided with a limiting step that interferes with the ceramic sleeve. Preferably, the limiting step is an annular step, and the inner diameter of the limiting step is the same as that of the ceramic sleeve.

[0008] In the above-mentioned pressure regulating valve structure of a high-pressure cleaning machine, the ceramic sleeve and the internal threaded portion have the same inner diameter, and the upper end surface of the ceramic sleeve is flush with the upper end surface of the valve seat.

[0009] In the above-mentioned pressure regulating valve structure of a high-pressure cleaning machine, a first arc-shaped guide ring is arranged at the upper opening of the sleeve mounting portion, and a second arc-shaped guide ring is arranged at the bottom of the outer circle of the ceramic sleeve, and the first arc-shaped guide ring and the second arc-shaped guide ring form a guiding structure during press-fitting.

[0010] In the above-mentioned pressure regulating valve structure of a high-pressure cleaning machine, an arc-shaped sealing surface is provided at the upper end of the inner circle of the ceramic sleeve, and the arc-shaped sealing surface cooperates with the ceramic sphere to seal.

[0011] In the above-mentioned pressure regulating valve structure of a high-pressure cleaning machine, the thickness of the ceramic sleeve is 1-2 mm. Preferably, the thickness of the ceramic sleeve is substantially the same as the thickness of the sleeve mounting portion.

[0012] In the above-mentioned pressure regulating valve structure of a high-pressure cleaning machine, the valve core includes a rod body, a valve core seat is sleeved on the rod body and is in contact with the bottom of the valve body, a ball head seat is screwed and fixed to the bottom of the rod body, and the ceramic ball is embedded in the bottom of the ball head seat. Furthermore, an enlarged pressure regulating spring mounting seat is provided at the upper end of the rod body.

[0013] In the above-mentioned pressure regulating valve structure of a high-pressure cleaning machine, a sealing step is provided at the upper end of the valve core seat, a first sealing ring which is sealingly connected to the bottom of the valve body is installed on the sealing step, a second sealing ring is sleeved on the valve body, and a third sealing ring is sleeved on the valve seat, further, annular sealing ring mounting grooves are provided on the outer peripheral surfaces of the valve body and the valve seat, and the second sealing ring and the third sealing ring are respectively installed in the corresponding sealing ring mounting grooves.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model provides a pressure regulating valve structure of a high-pressure cleaning machine, which improves the structure of the valve seat. A ceramic sleeve is embedded in the valve seat to match the ceramic sphere of the valve core. The advantages of high surface finish, high wear resistance and high hardness of the ceramic can be utilized to increase the wear resistance and sealing performance of the valve core and the valve seat, thereby extending the service life of the valve core and the valve seat, and further extending the service life of the pressure regulating valve and the high-pressure cleaning machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model (excluding the valve seat);

[0017] Figure 2 It is a three-dimensional diagram of the valve core of the utility model;

[0018] Figure 3 It is a three-dimensional diagram of the valve seat of the utility model;

[0019] Figure 4 yes Figure 3 Axial cross-sectional view of

[0020] Figure numerals: 1. valve body; 2. valve core; 3. valve seat; 4. pressure-adjusting nut; 5. ball head; 6. ceramic sphere; 7. ceramic sleeve; 8. sleeve mounting portion; 9. internal thread portion; 10. limiting step; 11. first arc-shaped guide ring; 12. second arc-shaped guide ring; 13. arc-shaped sealing surface; 14. rod body; 15. valve core seat; 16. pressure-adjusting spring mounting seat; 17. ball head seat; 18. first sealing ring; 19. second sealing ring; 20. third sealing ring. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings. Figure 1-4 :

[0022] A pressure regulating valve structure of a high-pressure cleaning machine includes a valve body 1, a valve core 2, a valve seat 3 and a pressure regulating nut 4. The valve core 2 is slidably arranged in the valve body 1, and a ball head 5 that cooperates with the valve seat 3 for sealing is arranged at the bottom of the valve core 2. The pressure regulating nut 4 is adjustably screwed on the top of the valve body 1, and a pressure regulating spring is arranged between the pressure regulating nut 4 and the valve core 2. A ceramic sphere 6 is embedded in the end of the ball head 5, and a ceramic sleeve 7 is embedded in the valve seat 3. When the ceramic sphere 6 and the ceramic sleeve 7 collide with each other, a sealing structure is formed.

[0023] The installation method and pressure regulation method of the pressure regulating valve in this embodiment are the same as those of the existing pressure regulating valve. When the valve core 2 moves down until the ceramic ball 6 contacts the ceramic sleeve 7, the pressure regulating valve is in a closed state; when the valve core 2 moves up, the ceramic ball 6 leaves the ceramic sleeve 7, and the pressure regulating valve is in an open state.

[0024] Compare with Figure 3 and attached Figure 4 In this embodiment, the valve seat 3 is coaxially arranged with the ceramic sleeve 7, and the valve seat 3 includes a sleeve mounting portion 8 at the upper end and an internal threaded portion 9 at the lower end, and the ceramic sleeve 7 is embedded in the sleeve mounting portion 8. The bottom of the sleeve mounting portion 8 is provided with a limiting step 10 that interferes with the ceramic sleeve 7. Preferably, the limiting step 10 is an annular step, and the inner diameter of the limiting step 10 is the same as that of the ceramic sleeve 7.

[0025] Preferably, the ceramic sleeve 7 and the internal threaded portion 9 have the same inner diameter, and the upper end surface of the ceramic sleeve 7 is flush with the upper end surface of the valve seat 3 .

[0026] In this embodiment, the ceramic sleeve 7 is embedded in the sleeve mounting portion 8 by press-fitting. A first arc-shaped guide ring 11 is provided at the upper opening of the sleeve mounting portion 8, and a second arc-shaped guide ring 12 is provided at the bottom of the outer circle of the ceramic sleeve 7. The first arc-shaped guide ring 11 and the second arc-shaped guide ring 12 form a guiding structure during press-fitting. The ceramic sleeve 7 can be press-fitted into the sleeve mounting portion 8 more conveniently through the guiding structure.

[0027] In order to make the pressure regulating valve obtain better sealing performance, an arc-shaped sealing surface 13 is provided at the upper end of the inner circle of the ceramic sleeve 7 , and the arc-shaped sealing surface 13 cooperates with the ceramic sphere 6 to seal.

[0028] Preferably, the thickness of the ceramic sleeve 7 is 1-2 mm. Preferably, the thickness of the ceramic sleeve 7 is substantially the same as the thickness of the sleeve mounting portion 8.

[0029] Compare with Figure 2 In this embodiment, the valve core 2 includes a rod body 14, a valve core seat 15 is sleeved on the rod body 14 and is connected to the bottom of the valve body 1, and an expanded pressure regulating spring mounting seat 16 is arranged on the upper end of the rod body 14. A ball head seat 17 is screwed and fixed to the bottom of the rod body 14, and the ceramic ball 6 is embedded in the bottom of the ball head seat 17. The pressure regulating spring mounting seat 16 serves as a mounting structure for the pressure regulating spring and, together with the valve core seat 15, serves as a limit structure for the valve core 2 to slide up and down.

[0030] A sealing step is provided at the upper end of the valve core seat 15, and a first sealing ring 18 sealingly connected to the bottom of the valve body 1 is installed on the sealing step, a second sealing ring 19 is sleeved on the valve body 1, and a third sealing ring 20 is sleeved on the valve seat 3, the first sealing ring 18 seals the valve body 1 and the valve core 2, the second sealing ring 19 and the third sealing ring 20 are respectively used for the sealing structure when the valve body 1 and the valve seat 3 are installed, further, annular sealing ring mounting grooves are provided on the outer peripheral surfaces of the valve body 1 and the valve seat 3, and the second sealing ring 19 and the third sealing ring 20 are respectively installed in the corresponding sealing ring mounting grooves.

[0031] 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 pressure regulating valve structure for a high-pressure cleaning machine, comprising a valve body (1), a valve core (2), a valve seat (3) and a pressure regulating nut (4), wherein the valve core (2) is slidably arranged in the valve body (1), a ball head (5) cooperating and sealing with the valve seat (3) is arranged at the bottom of the valve core (2), the pressure regulating nut (4) is adjustably screwed on the top of the valve body (1), a pressure regulating spring is arranged between the pressure regulating nut (4) and the valve core (2), and the characteristics are as follows: A ceramic sphere (6) is embedded in the end of the ball head (5), a ceramic sleeve (7) is embedded in the valve seat (3), and a sealing structure is formed when the ceramic sphere (6) and the ceramic sleeve (7) collide with each other.

2. A pressure regulating valve structure for a high pressure cleaning machine according to claim 1, characterized in that: The valve seat (3) is coaxially arranged with the ceramic sleeve (7), and the valve seat (3) comprises a sleeve mounting portion (8) at the upper end and an internal threaded portion (9) at the lower end. The ceramic sleeve (7) is embedded in the sleeve mounting portion (8), and a limiting step (10) is provided at the bottom of the sleeve mounting portion (8) for contact with the ceramic sleeve (7).

3. A pressure regulating valve structure for a high pressure cleaning machine according to claim 2, characterized in that: The ceramic sleeve (7) and the internal threaded portion (9) have the same inner diameter, and the upper end surface of the ceramic sleeve (7) is flush with the upper end surface of the valve seat (3).

4. The pressure regulating valve structure of a high pressure cleaning machine according to claim 2, characterized in that: A first arc-shaped guide ring (11) is arranged at the upper opening of the sleeve mounting portion (8), and a second arc-shaped guide ring (12) is arranged at the bottom of the outer circle of the ceramic sleeve (7). The first arc-shaped guide ring (11) and the second arc-shaped guide ring (12) form a guide structure during press-fitting.

5. The pressure regulating valve structure of a high pressure cleaning machine according to claim 2, characterized in that: An arc-shaped sealing surface (13) is provided at the inner circle upper end of the ceramic sleeve (7), and the arc-shaped sealing surface (13) cooperates with the ceramic sphere (6) to form a seal.

6. The pressure regulating valve structure of a high pressure cleaning machine according to claim 2, characterized in that: The thickness of the ceramic sleeve (7) is 1-2 mm.

7. The pressure regulating valve structure of a high pressure cleaning machine according to claim 2, characterized in that: The valve core (2) comprises a rod body (14), on which a valve core seat (15) is sleeved and abutted against the bottom of the valve body (1), and an enlarged diameter pressure regulating spring mounting seat (16) is arranged at the upper end of the rod body, and a ball head seat (17) is screwed and fixed at the bottom of the rod body (14), and the ceramic ball (6) is embedded in the bottom of the ball head seat (17).

8. The pressure regulating valve structure of a high pressure cleaning machine according to claim 7, characterized in that: A sealing step is provided at the upper end of the valve core seat (15), a first sealing ring (18) is mounted on the sealing step and is sealed to the bottom of the valve body (1), a second sealing ring (19) is sleeved on the valve body (1), and a third sealing ring (20) is sleeved on the valve seat (3).

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