Anti-blocking structure for plunger pump of spraying machine

Abstract

This invention discloses an anti-clogging structure for a plunger pump in a spray painting machine, including a pump body and a plunger rod assembly, a feed valve assembly, and a discharge valve assembly mounted on the pump body. The pump body also includes an anti-clogging component, comprising an anti-clogging rod, an anti-clogging mounting base, a pressing cap, and a return spring. The anti-clogging rod is mounted to the pump body via the anti-clogging mounting base and can slide relative to the pump body and the anti-clogging mounting base. The return spring provides the spring force for the anti-clogging rod to return to its original position. The pressing cap is connected to the end of the anti-clogging rod. By pressing the anti-clogging rod with the pressing cap, the discharge valve ball in the discharge valve assembly is pushed. After releasing the pressing cap, the anti-clogging rod returns to its original position under the spring force. This invention solves the problem of the discharge valve ball sticking and blocking the discharge in spray painting machines, reducing the number of operating steps for customers, lowering maintenance costs, and improving user experience.

Description

Technical Field

[0001] This invention relates to the field of plunger pump technology for spraying machines, and more specifically to an anti-clogging structure for plunger pumps in spraying machines. Background Technology

[0002] Spray painting machines are common painting tools in our lives, and the plunger pump is an important component. The plunger pump contains a suction valve and a discharge valve to control its operation. The suction valve includes a steel ball. Existing suction valves are horizontally positioned; therefore, the steel ball requires a return spring to reset.

[0003] The plunger pump chamber has a small volume and the plunger moves at a high frequency. If left stagnant for a long time or if the pump body is not thoroughly cleaned, the discharge valve plate and ball may stick together, making it difficult for the pressure generated by the plunger movement to open, thus preventing the sprayer from drawing material properly. The conventional solution requires disassembling the entire discharge valve assembly, cleaning the internal parts, and then reassembling it. This process is not only cumbersome but also prone to errors such as misassembly or omission of parts. Therefore, it is essential to address this problem. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to provide an anti-clogging structure for a plunger pump in a spraying machine.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: an anti-clogging structure for a plunger pump in a spraying machine, comprising a pump body, and a plunger rod assembly, a feed valve assembly, and a discharge valve assembly disposed on the pump body; the pump body is further provided with an anti-clogging assembly, which includes an anti-clogging rod, an anti-clogging mounting seat, a pressing cover, and a return spring. The anti-clogging rod is installed and connected to the pump body through the anti-clogging mounting seat, and the anti-clogging rod can slide relative to the pump body and the anti-clogging mounting seat. The return spring provides the elastic force for the anti-clogging rod to return to its original position. The pressing cover is connected to the end of the anti-clogging rod. By pushing the anti-clogging rod with the pressing cover, the discharge valve ball in the discharge valve assembly is pushed. After releasing the pressing cover, the anti-clogging rod returns to its original position under the elastic force of the return spring.

[0006] In the above-mentioned anti-clogging structure for a plunger pump in a spraying machine, the pump body is provided with a plunger hole, a feed valve hole, a material passage hole, a discharge valve hole, a discharge anti-clogging hole, and a discharge anti-clogging mounting hole. The anti-clogging component is installed and connected to the pump body through the discharge anti-clogging hole and the discharge anti-clogging mounting hole.

[0007] In the above-mentioned anti-clogging structure for a plunger pump in a spraying machine, the discharge anti-clogging hole is connected to the material passage hole and the discharge valve hole respectively. The discharge anti-clogging hole is also set on the same central axis as the discharge valve hole. The anti-clogging rod slides in the discharge anti-clogging hole to extend into the discharge valve assembly and push the discharge valve ball.

[0008] In the above-mentioned anti-clogging structure for a plunger pump in a spraying machine, a sealing positioning groove is provided in the discharge anti-clogging hole, and a sealing positioning component is provided in the sealing positioning groove. The sealing positioning component seals and positions the sliding anti-clogging rod. The sealing positioning component includes a sealing ring and a positioning ring.

[0009] In the above-mentioned anti-clogging structure for a plunger pump in a spraying machine, the anti-clogging mounting base is provided with a mounting hole, a return spring is sleeved on the anti-clogging rod, and a boss that abuts against the return spring is provided on the anti-clogging rod. The boss also forms a positioning sliding fit with the mounting hole.

[0010] In the aforementioned anti-clogging structure for a plunger pump in a spraying machine, the anti-clogging component further includes a protective sleeve, which is fixed to the pump body by an anti-clogging mounting seat.

[0011] In the aforementioned anti-clogging structure for a plunger pump in a spraying machine, an anti-clogging component is also provided on the pump body at the corresponding feed valve assembly. The pump body is also provided with a feed anti-clogging hole and a feed anti-clogging mounting hole. The feed anti-clogging hole leads to the feed valve hole. Here, the anti-clogging component is installed and connected to the pump body through the feed anti-clogging hole and the feed anti-clogging mounting hole. The anti-clogging rod in the anti-clogging component slides in the feed anti-clogging hole and pushes the feed valve ball in the feed valve assembly.

[0012] In the aforementioned anti-clogging structure for a plunger pump in a spraying machine, the pump body is further provided with an exhaust assembly, which communicates with the material passage hole for exhaust purposes.

[0013] In the aforementioned anti-clogging structure for a plunger pump in a spraying machine, the pump body is further provided with a pressure regulating component, which communicates with the material passage for pressure regulation.

[0014] The present invention has the following beneficial effects: This invention adds an anti-clogging structure at the discharge point. By pressing, the discharge valve ball in the discharge valve assembly is contacted and actuated, causing displacement of the ball and relative movement between it and other components. This achieves anti-sticking and anti-clogging functions. It solves the problem of the discharge valve ball sticking and blocking the discharge during the use of spray painting machines, reducing the number of operating steps for customers, lowering maintenance costs, and improving user experience. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention; Figure 2 This is a plan view of the present invention; Figure 3 yes Figure 2 Cross-sectional view along the AA direction; Figure 4 yes Figure 3 Enlarged view of section C; Figure 5 yes Figure 2 Cross-sectional view along the BB direction; Detailed Implementation

[0016] The invention will be further described with reference to the accompanying drawings.

[0017] Please see Figures 1 to 5 This invention provides an anti-clogging structure for a plunger pump in a spraying machine, including a pump body 1, and a plunger rod assembly 2, a feed valve assembly 3, and a discharge valve assembly 4 disposed on the pump body 1; the pump body 1 is also provided with an anti-clogging component 5, and the pump body 1 is provided with a plunger hole 10, a feed valve hole 11, a material passage hole 12, a discharge valve hole 13, a discharge anti-clogging hole 14, and a discharge anti-clogging mounting hole 15, and the anti-clogging component 5 is installed and connected to the pump body 1 through the discharge anti-clogging hole 14 and the discharge anti-clogging mounting hole 15.

[0018] The anti-blocking component 5 includes an anti-blocking rod 6, an anti-blocking mounting base 7, a pressing cover 8, and a return spring 9. The anti-blocking rod 6 is installed and connected to the pump body 1 through the anti-blocking mounting base 7. The anti-blocking rod 6 can slide relative to the pump body and the anti-blocking mounting base 7. The return spring 9 provides the elastic force for the anti-blocking rod 6 to return. The pressing cover 8 is connected to the end of the anti-blocking rod 6.

[0019] Furthermore, the discharge anti-blocking hole 14 is connected to the material passage hole 12 and the discharge valve hole 13 respectively, and the discharge anti-blocking hole 14 is also arranged on the same central axis as the discharge valve hole 13, and the anti-blocking rod 6 slides in the discharge anti-blocking hole 14.

[0020] In use, pressing the cover 8 pushes the anti-blocking rod 6, which interacts within the discharge anti-blocking hole 14. During this sliding process, it compresses the return spring 9, pushing the anti-blocking rod 6 until its end extends into the discharge valve assembly 4, pushing against the discharge valve ball 4-1. This causes relative movement between the stuck discharge valve ball 4-1 and the valve plate in the discharge valve assembly 4, achieving the anti-sticking function. After releasing the pressure, the anti-blocking rod 6 returns to its original position under the elastic force of the return spring 9.

[0021] Furthermore, in order to improve installation stability and sealing performance, a sealing positioning groove 16 is provided in the discharge anti-blocking hole 14, and a sealing positioning component is provided in the sealing positioning groove 16. The sealing positioning component seals and positions the sliding anti-blocking rod 6. The sealing positioning component includes a sealing ring 17 and a positioning ring 18.

[0022] Furthermore, the anti-blocking mounting base 7 is provided with a mounting hole 19, and the return spring 9 is sleeved on the anti-blocking rod 6. The anti-blocking rod 6 is provided with a boss 20 that abuts against the return spring 9. When the anti-blocking rod 6 slides, the boss 20 compresses the return spring 9. The boss 20 also forms a positioning sliding fit with the mounting hole 19, which can position the anti-blocking rod 6 and prevent it from shaking.

[0023] Furthermore, the anti-blocking component 5 also includes a protective sleeve 21, which is fixed to the pump body 1 by the anti-blocking mounting seat 7, and the end of the anti-blocking rod 6 is located in the protective sleeve 21.

[0024] Furthermore, an anti-blocking component 5 is also provided on the pump body 1 at the corresponding feed valve assembly 3. The pump body 1 is also provided with a feed anti-blocking hole 22 and a feed anti-blocking mounting hole 23. The feed anti-blocking hole 22 leads to the feed valve hole 11. Here, the anti-blocking component 5 is installed and connected to the pump body 1 through the feed anti-blocking hole 22 and the feed anti-blocking mounting hole 23. The anti-blocking rod 6 in the anti-blocking component 5 slides in the feed anti-blocking hole 22, pushing the feed valve ball 3-1 in the feed valve assembly 3. The anti-blocking component 5 at the feed valve assembly 3 operates in the same way and on the same principle as the anti-blocking component 5 at the discharge valve assembly 4.

[0025] Furthermore, the pump body 1 is also provided with an exhaust assembly 24, which communicates with the feed hole 12 for exhaust purposes.

[0026] Furthermore, the pump body 1 is also provided with a pressure regulating component 25, which communicates with the feed hole 12 for pressure regulation.

[0027] The above provides a detailed description of an anti-clogging structure for a plunger pump in a spraying machine, as provided in the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions disclosed in the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An anti-clogging structure for a plunger pump in a spraying machine, comprising a pump body (1), and a plunger rod assembly (2), a feed valve assembly (3), and a discharge valve assembly (4) disposed on the pump body (1); characterized in that: The pump body (1) is also provided with an anti-blocking component (5). The anti-blocking component (5) includes an anti-blocking rod (6), an anti-blocking mounting seat (7), a pressing cover (8), and a reset spring (9). The anti-blocking rod (6) is installed and connected to the pump body (1) through the anti-blocking mounting seat (7). The anti-blocking rod (6) can slide relative to the pump body and the anti-blocking mounting seat (7). The reset spring (9) provides the elastic force for the anti-blocking rod (6) to reset. The pressing cover (8) is connected to the end of the anti-blocking rod (6). The pressing cover (8) pushes the anti-blocking rod (6) to push the discharge valve ball (4-1) in the discharge valve assembly (4). After releasing the pressing, the anti-blocking rod (6) resets under the elastic force of the reset spring (9).

2. The anti-clogging structure for a plunger pump in a spraying machine according to claim 1, characterized in that: The pump body (1) is provided with a plunger hole (10), a feed valve hole (11), a feed passage hole (12), a discharge valve hole (13), a discharge anti-blocking hole (14), and a discharge anti-blocking installation hole (15). The anti-blocking component (5) is installed and connected to the pump body (1) through the discharge anti-blocking hole (14) and the discharge anti-blocking installation hole (15).

3. The anti-clogging structure for a plunger pump in a spraying machine according to claim 3, characterized in that: The discharge anti-blocking hole (14) is connected to the material passage hole (12) and the discharge valve hole (13) respectively. The discharge anti-blocking hole (14) and the discharge valve hole (13) are set on the same central axis. The anti-blocking rod (6) slides in the discharge anti-blocking hole (14) to extend into the discharge valve assembly (4) to push the discharge valve ball (4-1).

4. The anti-clogging structure for a plunger pump in a spraying machine according to claim 4, characterized in that: The discharge anti-blocking hole (14) is provided with a sealing positioning groove (16), and a sealing positioning component is provided in the sealing positioning groove (16). The sealing positioning component seals and positions the anti-blocking rod (6) as it slides. The sealing positioning component includes a sealing ring (17) and a positioning ring (18).

5. The anti-clogging structure for a plunger pump in a spraying machine according to claim 1, characterized in that: The anti-blocking mounting base (7) is provided with a mounting hole (19), the reset spring (9) is sleeved on the anti-blocking rod (6), and the anti-blocking rod (6) is provided with a boss (20) that abuts against the reset spring (9). The boss (20) and the mounting hole (19) form a positioning sliding fit.

6. The anti-clogging structure for a plunger pump in a spraying machine according to claim 1, characterized in that: The anti-clogging component (5) also includes a protective sleeve (21), which is fixed to the pump body (1) by an anti-clogging mounting seat (7).

7. The anti-clogging structure for a plunger pump in a spraying machine according to claim 2, characterized in that: The pump body (1) is also provided with an anti-blocking component (5) at the corresponding feed valve assembly (3). The pump body (1) is also provided with a feed anti-blocking hole (22) and a feed anti-blocking mounting hole (23). The feed anti-blocking hole (22) leads to the feed valve hole (11). The anti-blocking component (5) is installed and connected to the pump body (1) through the feed anti-blocking hole (22) and the feed anti-blocking mounting hole (23). The anti-blocking rod (6) in the anti-blocking component (5) slides in the feed anti-blocking hole (22) and pushes the feed valve ball (3-1) in the feed valve assembly (3).

8. The anti-clogging structure for a plunger pump in a spraying machine according to claim 1, characterized in that: The pump body (1) is also provided with an exhaust assembly (24), which is connected to the feed hole (12) for exhaust.

9. The anti-clogging structure for a plunger pump in a spraying machine according to claim 1, characterized in that: The pump body (1) is also provided with a pressure regulating component (25), which is connected to the feed hole (12) for pressure regulation.

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