Proportional relief valve

Abstract

This utility model relates to a proportional regulating overflow valve, particularly in the field of industrial water treatment technology. It includes a valve body with a connecting pipe connected to it. A filter pipe is connected to the connecting pipe, and caps are detachably connected to both ends of the filter pipe. A filter screen is installed inside the filter pipe, and a horizontally sliding piston mechanism is also provided within the filter pipe. This utility model improves work efficiency and controls maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of industrial water treatment technology, and in particular to a proportional regulating overflow valve. Background Technology

[0002] Currently, proportional relief valves are hydraulic control components that precisely correlate electrical signals with hydraulic system pressure. Their core function is to continuously and adjustably control the maximum working pressure of the hydraulic system through the input proportional electrical signal. They have the dual characteristics of "pressure regulation" and "electro-hydraulic proportional control" and are widely used in hydraulic systems that require dynamic pressure adjustment.

[0003] In practical applications of proportional control valves, impurities often enter the valve along with the fluid due to issues such as insufficient pipeline cleanliness, filter failure, or impurities in the medium itself. These impurities can cause control failure and damage to components of the proportional control valve. Currently, impurities in the fluid are usually filtered by installing a filter device at the front end of the oil inlet pipeline. However, when cleaning the filter element and filter residue, the entire fluid circuit where the proportional overflow valve is located must be shut down first, and the residual fluid in the filter device and connecting pipeline must be drained. This results in the waste of process fluid, increased maintenance costs, and a significant reduction in overall work efficiency. Utility Model Content

[0004] To improve work efficiency and control maintenance costs, this utility model provides a proportional regulating overflow valve.

[0005] This utility model provides a proportional regulating overflow valve, which adopts the following technical solution: A proportional regulating overflow valve includes a valve body, a connecting pipe connected to the valve body, a filter pipe connected to the connecting pipe, caps detachably connected to both ends of the filter pipe, a filter screen provided in the filter pipe, and a horizontally sliding piston mechanism provided in the filter pipe. The piston mechanism moves laterally along the filter tube to scrape the filter residue on the filter screen into the caps at both ends of the filter tube.

[0006] By adopting the above technical solution, the filter is installed at the lower interface of the valve body. Fluid enters the connecting pipe, and impurities in the fluid adhere to the lower surface of the filter screen. Without disassembling the connecting pipe, the piston mechanism moves horizontally laterally within the filter tube. The piston mechanism scrapes the filter residue on the filter screen and deposits it into the caps at both ends of the filter tube through its movement on the filter screen. This allows for filter screen cleaning without disassembling the filter valve, avoiding the need to completely close the valve and waste fluid during cleaning, thus improving work efficiency and preventing waste.

[0007] Optionally, the piston mechanism includes a piston disposed inside the filter tube and sliding on the filter screen, and a push-pull rod fixed on the piston. The piston is provided with a water inlet groove, which horizontally penetrates both ends of the piston and vertically connects upward to the internal flow channel of the connecting pipe at the middle position.

[0008] By adopting the above technical solution, the water inlet groove in the piston runs through both ends of the piston and extends vertically upwards to the connecting pipe in the middle. The piston rod's pushing and pulling motion drives the piston to move horizontally along the filter pipe. When the piston moves towards both ends of the filter pipe under the force of the pushing and pulling rod, the water inlet groove squeezes the liquid flowing between the piston and both ends of the filter pipe into the internal flow channel of the connecting pipe. This ensures that when the piston moves to one end of the filter pipe, there is no liquid flowing between the piston and the filter pipe, preventing waste of liquid while the cover is opened to clean the filter residue.

[0009] Optionally, the water inlet channel has cavities at both ends and in the middle, and each cavity has a one-way flow valve. The water inlet channel can squeeze the liquid flowing on both sides of the piston into the internal flow channel of the connecting pipe through the valve.

[0010] By adopting the above technical solution, the water inlet tank can squeeze the liquid flowing from both ends of the filter pipe into the internal flow channel of the connecting pipe through the piston. Two horizontally connected valve discs are installed inside the tank cavity near the outer edge. When the liquid flows into the water inlet tank from both ends of the filter pipe, the liquid can open the valve discs inward due to the pressure difference and enter the water inlet tank. Conversely, when the liquid is squeezed outward from inside the water inlet tank, it confines the valve discs within the tank cavity, achieving valve closure. In the vertical tank cavity, the valve discs are horizontally positioned, and the liquid is squeezed upward to open the valve discs and flow out. This achieves unidirectional movement of the liquid in the water inlet tank, reducing liquid waste.

[0011] Optionally, the piston has a protruding scraper ring on its edge, and a rubber ring is fitted inside the cover body, with an annular groove on the rubber ring to accommodate the scraper ring.

[0012] By adopting the above technical solution, the scraper ring can scrape and clean the filter screen as the piston moves horizontally along the filter tube, cleaning the filter residue on the filter screen into the cover. The rubber ring on the cover can play a sealing role, and the ring groove on the rubber ring can accommodate the filter residue and seal with the scraper ring, realizing a tight fit between the piston and the cover, avoiding waste caused by liquid residue.

[0013] Optionally, one end of the push-pull rod is fixed to the piston, the other end of the push-pull rod passes through the cover, and a shaft seal is provided between the push-pull rod and the cover.

[0014] By adopting the above technical solution, the piston can be driven to move horizontally inside the filter tube by pushing and pulling the push rod that penetrates the cover. The shaft seal can increase the sealing effect of the filter tube and prevent the liquid from flowing out from the gap between the push rod and the cover under the pressure of the piston.

[0015] Optionally, a bracket is provided below the filter screen for the piston mechanism to slide. The filter tube is provided with an installation groove for installing the filter screen and the bracket, and a limiting protrusion for restricting the filter screen is provided in the connecting tube.

[0016] By adopting the above technical solution, the filter screen and the bracket are cylindrical and installed in the mounting groove of the filter tube, providing support for the horizontal movement of the piston in the filter tube. The limiting protrusion is located in the connecting tube and is placed above the mounting groove of the filter screen. The limiting protrusion and the mounting groove cooperate to stabilize the filter screen and the bracket, preventing the filter screen from loosening under the flushing of the liquid.

[0017] Optionally, the connecting pipe is threaded to the valve body, and a groove is provided at the top of the connecting pipe, with a magnetic ring provided in the groove.

[0018] By adopting the above technical solution, the top of the connecting pipe is threaded to the valve body, and the top of the connecting pipe is provided with a groove to accommodate the magnetic ring, which is further fixed by magnetic attraction of the magnetic ring, thus providing stability.

[0019] Optionally, the connecting pipe is provided with a connector for fixing the magnetic ring to the connecting pipe.

[0020] By adopting the above technical solution, the magnetic ring is fixed in the groove by a horizontally sliding connector, which improves stability and prevents the magnetic ring from falling out of the groove.

[0021] Optionally, the connector includes a connecting portion; Both the connecting pipe and the magnetic ring are provided with fixing grooves for the connecting part to slide horizontally into.

[0022] By adopting the above technical solution, the connector includes an "L"-shaped connecting part, which slides into the fixing groove and connects with the connecting pipe. The tight fit between the connecting part and the fixing groove enhances the connection stability between the magnetic ring and the connecting pipe.

[0023] Optionally, the connector includes an insertion portion disposed on the connecting portion for fixing the magnetic ring in the groove; The connecting tube has a socket for the insertion part to be snapped into place.

[0024] By adopting the above technical solution, the two ends of the connecting part have protruding insertion parts. When the connecting part is slid horizontally into the fixing groove of the connecting tube, the insertion part is engaged in the socket to lock the magnetic ring in the connecting tube and prevent it from falling out.

[0025] In summary, this utility model has at least one of the following beneficial technical effects: 1. The piston moves horizontally in the filter tube, scraping the residue on the filter screen into the cover, thus cleaning the filter screen without disassembly; 2. The water inlet can squeeze the liquid flowing at both ends of the filter tube into the connecting tube when the piston moves, reducing the waste of liquid; 3. Cleaning the filter residue on the filter screen does not affect the use of the filter valve, thus improving work efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the installation of the filter valve and valve body; Figure 2 This is a schematic diagram of a proportional regulating overflow valve; Figure 3 This is an exploded schematic diagram of a proportional regulating overflow valve; Figure 4 This is a schematic diagram of the piston mechanism and the cover. Figure 5 This is a cross-sectional view of the piston; Figure 6 This is a partial sectional view of the piston; Figure 7 This is a cross-sectional view of a proportional regulating relief valve; Figure 8 This is a partial cross-sectional view of the magnetic ring and the connecting tube. The parts referred to by the numbers in the above attached figures are as follows: 1. Connecting pipe; 2. Filter pipe; 3. Cover; 4. Filter screen; 5. Piston mechanism; 6. Piston; 7. Push-pull rod; 8. Water inlet trough; 9. Groove cavity; 10. Valve disc; 11. Scraper ring; 12. Rubber ring; 13. Ring groove; 15. Shaft seal; 16. Bracket; 17. Mounting groove; 18. Limiting protrusion; 19. Groove; 20. Magnetic ring; 21. Connecting piece; 22. Fixing groove; 23. Valve body; 24. Raised pattern; 25. Boss; 26. Insertion part; 27. Socket; 28. Connecting part. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0028] This utility model discloses a proportional regulating overflow valve.

[0029] Reference Figure 1 and Figure 2As shown, the connecting pipe 1 is installed at the lower interface of the valve body 23, and includes the connecting pipe 1, the filter pipe 2, the cover 3, and the piston mechanism 5. The connecting pipe 1 is a vertical annular column, and the filter pipe 2 is a horizontal annular column. The two are connected and integrated. A boss 25, which is fixed in place, is welded to the inner side of the cover 3. A rubber ring 12 is fitted on the boss 25. The cover 3 is connected to the filter pipe 2 by a threaded connection and sealed with the rubber ring 12. The edge of the cover 3 has raised textures 24 to increase friction and facilitate the rotation of the cover 3. The piston mechanism 5 passes through the cover 3 and is located inside the filter pipe 2.

[0030] Reference Figure 2 As shown, a magnetic ring 20 is embedded at the top of the connecting pipe 1. The connecting pipe 1 and the valve body 23 are connected by threads and further fixed by magnetic attraction with the magnetic ring 20, thereby improving the connection stability.

[0031] Reference Figure 3 As shown, a groove 19 is provided at the top of the connecting tube 1, the magnetic ring 20 is embedded in the groove 19, and is fixed by the connector 21 sliding horizontally into the connecting tube 1.

[0032] Reference Figure 3 As shown, the piston mechanism 5 passes through the cover 3, and a shaft seal 15 is provided between the two. The piston mechanism 5 passes through the cover 3 and slides on the inner wall of the filter tube 2. The filter screen 4 and the bracket 16 are in the shape of a semi-annular cylinder and are snapped into the filter tube 2.

[0033] Reference Figure 3 and Figure 4 As shown, the piston mechanism 5 includes a piston 6 that slides on the inner wall of the filter tube 2 and a push-pull rod 7 welded integrally with the piston 6. The interior of the cover 3 has an inwardly protruding boss 25, on which a rubber ring 12 is fitted to seal the cover 3 and the filter tube 2. Protruding scraper rings 11 are ultrasonically welded to the edges of both ends of the piston 6. An inwardly opening annular groove 13 is formed on the rubber ring 12, which can accommodate the scraper ring 11 and filter residue, achieving a tight fit between the piston 6 and the cover 3.

[0034] refer to Figure 5 and Figure 6 As shown, the piston 6 has an inverted "T"-shaped water inlet groove 8 inside. A groove cavity 9 is opened at both ends of the horizontal water inlet groove 8 and in the vertical water inlet groove 8. A valve disc 10 is connected to the inside of the groove cavity 9 by a shaft. The diameter of the groove cavity 9 is larger than the diameter of the water inlet groove 8. The valve disc 10 is connected to the interface between the groove cavity 9 and the water inlet groove 8 by a shaft. The diameter of the groove cavity 9 restricts the valve disc 10 from flipping outward or downward, so that the valve disc 10 can only flip inward or upward, realizing the unidirectional flow of fluid in the water inlet groove 8.

[0035] refer to Figure 5As shown, the water inlet trough 8 can squeeze the liquid flowing from both ends of the filter tube 2 into the internal flow channel of the connecting pipe 1 through the piston 6. Two horizontally connected valve discs 10 in the water inlet trough 8 are installed in the trough cavity 9 and near the outer edge. When the liquid flows into the water inlet trough 8 from both ends of the filter tube 2, the liquid can open the valve disc 10 inward through the pressure difference and enter the water inlet trough 8. When the liquid is squeezed outward from inside the water inlet trough 8, the valve disc 10 is limited in the trough cavity 9, realizing the closure of the valve disc 10. In the vertical trough cavity 9, the valve disc 10 is horizontally placed in the trough cavity 9, and the liquid flows out by squeezing upward to open the valve disc 10.

[0036] refer to Figure 7 and Figure 8 As shown, an installation bracket 16 and a mounting groove 17 for the filter screen 4 are provided on the inner wall of the filter tube 2. A limiting protrusion 18 is welded to the connecting tube 1 at the edge of the mounting groove 17. The limiting protrusion 18 and the mounting groove 17 fix the filter screen 4 in a double manner.

[0037] refer to Figure 7 As shown, the bracket 16 and the filter screen 4 are installed in the mounting groove 17 of the filter tube 2 and are flush with the inner wall of the filter tube 2 to support the horizontal sliding of the piston 6 in the filter tube 2.

[0038] refer to Figure 8 As shown, the connector 21 includes an insertion part 26 and a connecting part 28. The connecting part 28 is L-shaped. A groove 19 is provided on the top of the connecting tube 1. The magnetic ring 20 is embedded in the groove 19. A fixing groove 22 is provided on the top of the magnetic ring 20 and the top of the connecting tube 1, and on the top of the groove 19, for the connector 21 to slide into. A socket 27 is provided on the connecting tube 1 for the insertion part 26 to engage. After the magnetic ring 20 is embedded in the groove 19, the connecting part 28 slides through the fixing groove 22, engaging and fixing the insertion part 26 with the socket 27, thus locking the magnetic ring 20 in the groove 19 at the top of the connecting tube 1.

[0039] The implementation principle of a proportional regulating overflow valve in this embodiment of the utility model is as follows: the filter valve is installed at the liquid inlet end of the valve body 23. The fluid enters through the connecting pipe 1, and after impurities are filtered out by the filter screen 4 in the filter pipe 2, it is then transported to the overflow valve. When the filter screen 4 needs to be cleaned, there is no need to stop the circuit: operate the push-pull rod 7 to drive the piston 6 to slide along the bracket 16, and the piston edge scraper ring 11 fits against the filter screen to scrape the filter residue to the cover body 3 at both ends of the filter tube 2; at the same time, the water inlet groove 8 inside the piston cooperates with the one-way valve 10 to guide the liquid on both sides of the piston into the main channel to avoid waste.

[0040] When the piston moves to the end of the filter tube, it seals with the inner rubber ring 12 of the cover body 3, blocking the cover body from the main flow channel. At this time, the cover body can be removed to clean the slag. After cleaning, it can be reinstalled. The filter valve remains operational throughout the process, achieving slag cleaning without disassembly or stopping the machine, thus improving efficiency and reducing costs. The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A proportional regulating relief valve, comprising a valve body (23), characterized in that, The valve body (23) is connected to a connecting pipe (1), and a filter pipe (2) is connected to the connecting pipe (1). The two ends of the filter pipe (2) are detachably connected to a cover (3). A filter screen (4) is provided in the filter pipe (2). A horizontally sliding piston mechanism (5) is provided in the filter pipe (2). The piston mechanism (5) moves laterally along the filter tube (2) to scrape the filter residue on the filter screen (4) into the caps (3) at both ends of the filter tube (2); The piston mechanism (5) includes a piston (6) disposed inside the filter tube (2) and sliding on the filter screen (4) and a push-pull rod (7) fixed on the piston (6). The piston (6) is provided with a water inlet groove (8). The water inlet groove (8) horizontally penetrates both ends of the piston (6) and vertically connects to the internal flow channel of the connecting pipe (1) at the middle position of the water inlet groove (8).

2. The proportional regulating overflow valve according to claim 1, characterized in that: The water inlet trough (8) has cavities (9) at both ends and in the middle. There is a one-way valve (10) in the cavity (9). The water inlet trough (8) can squeeze the liquid on both sides of the piston (6) into the internal flow channel of the connecting pipe (1) through the valve (10).

3. A proportional regulating overflow valve according to claim 2, characterized in that: The piston (6) has a protruding scraper ring (11) on its edge, and a rubber ring (12) is fitted inside the cover (3). The rubber ring (12) has an annular groove (13) for accommodating the scraper ring (11).

4. A proportional regulating overflow valve according to claim 1, characterized in that: One end of the push-pull rod (7) is fixed to the piston (6), and the other end of the push-pull rod (7) passes through the cover (3). A shaft seal (15) is provided between the push-pull rod (7) and the cover (3).

5. A proportional regulating overflow valve according to claim 1, characterized in that: Below the filter screen (4) is a bracket (16) for the piston mechanism (5) to slide. The filter tube (2) is provided with an installation groove (17) for installing the filter screen (4) and the bracket (16), and a limiting protrusion (18) for limiting the filter screen (4) is provided in the connecting tube (1).

6. A proportional regulating overflow valve according to claim 5, characterized in that: The top of the connecting pipe (1) is provided with a groove (19), and a magnetic ring (20) is provided in the groove (19).

7. A proportional regulating overflow valve according to claim 6, characterized in that: The connecting pipe (1) is provided with a connector (21) for fixing the magnetic ring (20) to the connecting pipe (1).

8. A proportional regulating overflow valve according to claim 7, characterized in that: The connector (21) includes a connecting part (28); Both the connecting pipe (1) and the magnetic ring (20) are provided with fixing grooves (22) for the connecting part (28) to slide horizontally into.

9. A proportional regulating overflow valve according to claim 8, characterized in that: The connector (21) includes an insertion part (26) disposed on the connecting part (28) and used to fix the magnetic ring (20) in the groove (19); The connecting tube (1) has a socket (27) for the insertion part (26) to be snapped into.

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