Pressure relief valve structure for a hydraulic pump

Abstract

The utility model discloses a kind of pressure relief valve structures of hydraulic pump, including lower valve body, the bottom end of lower valve body is equipped with first threaded joint, the top end of first threaded joint is communicated with the bottom end of lower valve body, the outer wall on the side of lower valve body is equipped with second threaded joint, one end of second threaded joint is communicated with the outer wall of lower valve body, the top end of lower valve body is equipped with communicating ring, the end of communicating ring away from lower valve body is equipped with upper valve body, the outer wall on the lower end of upper valve body is fixedly installed with placing ring, the bottom end of placing ring is fixedly connected with the top end of communicating ring, the outer wall on the both sides of placing ring is equipped with lifting ring, the both ends of communicating ring are communicated with the top end of lower valve body and the bottom end of upper valve body respectively.The utility model not only improves the convenience when pressure relief valve structure installation connection, also reaches the purpose of easily self-adapting convenient pressure relief to hydraulic pump, and reaches the purpose of easily cleaning and maintaining the bottom of pressure relief valve.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief valve technology, specifically to a pressure relief valve structure for a hydraulic pump. Background Technology

[0002] Hydraulic pumps are the core power source of hydraulic systems, and their output pressure must be strictly controlled within a safe range. As a key protective device for hydraulic pumps, pressure relief valves are used to automatically relieve pressure when the system pressure exceeds the set value, preventing pipeline rupture, seal damage, or equipment failure. Therefore, developing a pressure relief valve structure for hydraulic pumps has significant practical implications.

[0003] A pressure relief valve for a hydraulic pump, as described in CN203783879U, includes a valve body, an elastic element, and a valve plug. The valve body is a hollow shell with an inlet port communicating with the hydraulic fluid space and a first pressure relief port near the inlet port on its upper part. The elastic element is installed inside the valve body. A second pressure relief port is provided below the first pressure relief port on the valve body. The pressure relief valve also includes a ball valve, which is located above the elastic element. The valve plug is located above the ball valve, and the valve plug seals the inlet port and the first pressure relief port. The valve plug has a through hole, with one end of the through hole having a top end communicating with the inlet port and the other end having a bottom end sealed by the ball valve. This pressure relief valve structure can ensure the safe operation of the hydraulic pump not only when the valve plug slides normally, but also when the valve plug is stuck. As can be seen from the above, although this pressure relief valve structure can be well applied, it is usually not convenient to connect to a hydraulic pump, nor is it convenient to connect to an external pressure relief pipeline, which causes some inconvenience during use and needs to be improved. Utility Model Content

[0004] The purpose of this utility model is to provide a pressure relief valve structure for a hydraulic pump, so as to solve the problem that although the pressure relief valve structure proposed in the background art can be well applied, it is usually not convenient to connect to the hydraulic pump and not convenient to connect to the external pressure relief pipeline, which causes certain inconveniences during use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pressure relief valve structure for a hydraulic pump, comprising a lower valve body, a first threaded connector at the bottom end of the lower valve body, the top end of the first threaded connector being connected to the bottom end of the lower valve body, a second threaded connector on one side of the outer wall of the lower valve body, one end of the second threaded connector being connected to the outer wall of the lower valve body, a connecting ring at the top end of the lower valve body, an upper valve body at the end of the connecting ring away from the lower valve body, a placement ring fixedly installed on the outer wall of the lower end of the upper valve body, the bottom end of the placement ring being fixedly connected to the top end of the connecting ring, lifting rings on both sides of the outer wall of the placement ring, the two ends of the connecting ring being connected to the top end of the lower valve body and the bottom end of the upper valve body respectively, a piston block being movably connected to the lower end of the lower valve body, a plug plate being fixedly installed at the upper end of the upper valve body, a plug being inserted into the top end of the upper valve body, the bottom end of the plug extending into the interior of the upper valve body and contacting the top end of the plug plate.

[0006] Preferably, a maintenance body is provided on the outer wall of the lower valve body on the side away from the second threaded joint. One end of the maintenance body is connected to the outer wall of the lower valve body. The maintenance body is provided to facilitate maintenance work on the bottom area of ​​the lower valve body.

[0007] Preferably, the internal threads of the maintenance machine body are fitted with a threaded sealing post, one end of which extends to the outside of the maintenance machine body and is fixed with a handle. The threaded sealing post is used to seal and close the maintenance machine body.

[0008] Preferably, an upper base is installed at the bottom of the blocking plate, and a lower base is installed at the top of the piston block. The lower base and the upper base are arranged to accommodate the telescopic rod.

[0009] Preferably, the bottom end of the upper base is provided with a telescopic rod, the bottom end of which is connected to the top end of the lower base. The telescopic rod is provided to accommodate the inner and outer springs.

[0010] Preferably, an inner spring and an outer spring are wound around the outer wall of the telescopic rod, and the two ends of the inner spring and the outer spring are respectively connected to the bottom end of the blocking plate and the top end of the lower base. The inner spring and the outer spring are arranged to apply downward elastic pressure to the piston block.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the pressure relief valve structure of the hydraulic pump not only improves the convenience of installation and connection of the pressure relief valve structure, but also achieves the purpose of easy adaptive and convenient pressure relief of the hydraulic pump, and also achieves the purpose of easy cleaning and maintenance of the bottom of the pressure relief valve.

[0012] (1) By setting a first threaded connector and a second threaded connector at the bottom end and the outer wall of the lower valve body respectively, the pressure relief valve can be threadedly installed on the pressure relief port of the hydraulic pump by the first threaded connector, and the external pressure relief pipe can be threadedly installed on the second threaded connector, so as to improve the convenience of the pressure relief valve structure installation and connection.

[0013] (2) Both the inner and outer springs have good elasticity, so that they apply downward elastic pressure to the piston block through the telescopic rod. When the pressure value inside the hydraulic pump is high, the internal air pressure will flow into the lower valve body through the first threaded joint. As the pressure value inside the lower valve body increases, the piston block moves upward, so that the second threaded joint is in the open and closed state, and the air pressure can be discharged through the second threaded joint, thereby achieving the purpose of easy self-adaptive and convenient pressure relief of the hydraulic pump.

[0014] (3) By turning the handle, the threaded plug can be rotated to the outside of the maintenance machine body, and the lower end of the lower valve body can be cleaned and maintained through the maintenance machine body, thereby achieving the purpose of easy cleaning and maintenance of the bottom of the pressure relief valve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the left-side structure of this utility model;

[0016] Figure 2 This is a frontal cross-sectional view of the present invention.

[0017] Figure 3 This is a top view of the structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the right-side structure of this utility model.

[0019] In the diagram: 1. Lower valve body; 2. First threaded connector; 3. Second threaded connector; 4. Connecting ring; 5. Insert ring; 6. Upper valve body; 7. Plug; 8. Lifting ring; 9. Maintenance body; 10. Rotary handle; 11. Threaded sealing column; 12. Piston block; 13. Plug plate; 14. Upper base; 15. Lower base; 16. Telescopic rod; 17. Inner spring; 18. Outer spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] Please see Figure 1-4The present invention provides an embodiment of a pressure relief valve structure for a hydraulic pump, comprising a lower valve body 1, wherein a maintenance body 9 is provided on the outer wall of the lower valve body 1 on the side away from the second threaded joint 3, and one end of the maintenance body 9 is connected to the outer wall of the lower valve body 1.

[0022] During use, the bottom area of ​​the lower valve body 1 can be maintained by inspecting the machine body 9.

[0023] The internal threads of the maintenance body 9 are fitted with threaded plugs 11, one end of which extends to the outside of the maintenance body 9 and is fixed with a handle 10.

[0024] In use, the threaded sealing post 11 is used to seal and close the maintenance body 9.

[0025] The lower valve body 1 has a first threaded connector 2 at its bottom end, and the top end of the first threaded connector 2 is connected to the bottom end of the lower valve body 1. The lower valve body 1 has a second threaded connector 3 on one side of its outer wall, and one end of the second threaded connector 3 is connected to the outer wall of the lower valve body 1. The lower valve body 1 has a connecting ring 4 at its top end, and an upper valve body 6 is located at the end of the connecting ring 4 away from the lower valve body 1. A placement ring 5 is fixedly installed on the outer wall of the lower end of the upper valve body 6, and the bottom end of the placement ring 5 is fixedly connected to the top end of the connecting ring 4. A lifting ring 8 is provided on the outer walls of both sides of the placement ring 5. The two ends of the connecting ring 4 are connected to the top end of the lower valve body 1 and the bottom end of the upper valve body 6, respectively. A piston block 12 is movably connected to the lower end inside the lower valve body 1. A blocking plate 13 is fixed to the upper end inside the upper valve body 6. An upper base 14 is installed at the bottom end of the blocking plate 13, and a lower base 15 is installed at the top end of the piston block 12.

[0026] In use, the lower base 15 and the upper base 14 are set up to accommodate the telescopic rod 16.

[0027] The bottom end of the upper base 14 is provided with a telescopic rod 16, and the bottom end of the telescopic rod 16 is connected to the top end of the lower base 15.

[0028] In use, the telescopic rod 16 is used to house the inner spring 17 and the outer spring 18.

[0029] An inner spring 17 and an outer spring 18 are wound around the outer wall of the telescopic rod 16, and the two ends of the inner spring 17 and the outer spring 18 are respectively connected to the bottom end of the blocking plate 13 and the top end of the lower base 15.

[0030] In use, the inner spring 17 and the outer spring 18 are arranged to apply downward elastic pressure to the piston block 12;

[0031] A plug 7 is inserted and installed at the top of the upper valve body 6. The bottom end of the plug 7 extends into the interior of the upper valve body 6 and contacts the top of the plug plate 13.

[0032] In this embodiment, during use, a first threaded connector 2 and a second threaded connector 3 are respectively installed at the bottom end and outer wall of the lower valve body 1. The pressure relief valve is threaded onto the pressure relief port of the hydraulic pump via the first threaded connector 2, and the external pressure relief pipe is threaded onto the second threaded connector 3. This allows for a quick threaded connection of the pressure relief valve. Then, the inner spring 17 and the outer spring 18, both possessing good elasticity, apply downward elastic pressure to the piston block 12 via the telescopic rod 16. When the pressure value inside the hydraulic pump is relatively high... When the pressure is high, the internal air pressure flows into the lower valve body 1 through the first threaded connector 2. As the internal pressure of the lower valve body 1 increases, the piston block 12 moves upward, causing the second threaded connector 3 to open or close, allowing the air pressure to be discharged through the second threaded connector 3. This facilitates convenient pressure relief operations for the hydraulic pump. Finally, by turning the handle 10, the threaded sealing column 11 is rotated away from the outside of the maintenance body 9, allowing the lower end of the lower valve body 1 to be cleaned and maintained through the maintenance body 9, thus completing the use of this pressure relief valve structure.

Claims

1. A pressure relief valve structure for a hydraulic pump, characterized in that: The system includes a lower valve body (1), with a first threaded connector (2) at its bottom end. The top end of the first threaded connector (2) is connected to the bottom end of the lower valve body (1). A second threaded connector (3) is provided on the outer wall of one side of the lower valve body (1), with one end of the second threaded connector (3) connected to the outer wall of the lower valve body (1). A connecting ring (4) is provided at the top end of the lower valve body (1). An upper valve body (6) is provided at the end of the connecting ring (4) away from the lower valve body (1). A mounting ring (5) is fixedly installed on the outer wall of the lower end of the upper valve body (6). The bottom end of the component ring (5) is fixedly connected to the top end of the connecting ring (4). The outer walls on both sides of the component ring (5) are provided with lifting rings (8). The two ends of the connecting ring (4) are respectively connected to the top end of the lower valve body (1) and the bottom end of the upper valve body (6). The lower end of the lower valve body (1) is movably connected with a piston block (12). The upper end of the upper valve body (6) is fixed with a plug plate (13). The top end of the upper valve body (6) is inserted and installed with a plug (7). The bottom end of the plug (7) extends into the interior of the upper valve body (6) and touches the top end of the plug plate (13).

2. The pressure relief valve structure of a hydraulic pump according to claim 1, characterized in that: The lower valve body (1) has a maintenance body (9) on the outer wall away from the second threaded joint (3), and one end of the maintenance body (9) is connected to the outer wall of the lower valve body (1).

3. The pressure relief valve structure of a hydraulic pump according to claim 2, characterized in that: The internal threads of the maintenance body (9) are fitted with a threaded plug (11), one end of which extends to the outside of the maintenance body (9) and is fixed with a handle (10).

4. The pressure relief valve structure of a hydraulic pump according to claim 1, characterized in that: The bottom end of the blocking plate (13) is equipped with an upper base (14), and the top end of the piston block (12) is equipped with a lower base (15).

5. The pressure relief valve structure of a hydraulic pump according to claim 4, characterized in that: The bottom end of the upper base (14) is provided with a telescopic rod (16), and the bottom end of the telescopic rod (16) is connected to the top end of the lower base (15).

6. The pressure relief valve structure of a hydraulic pump according to claim 5, characterized in that: The outer wall of the telescopic rod (16) is wound with an inner spring (17) and an outer spring (18), and the two ends of the inner spring (17) and the outer spring (18) are respectively connected to the bottom end of the blocking plate (13) and the top end of the lower base (15).

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