Safety valve for high pressure piston pump

Abstract

The utility model discloses a kind of safety valves for high-pressure plunger pump, it is related to high-pressure plunger pump technical field, safety valve is connected on pump head body and is communicated with the high-pressure flow passage of pump head body, safety valve includes first sealing ring, support gasket, second sealing ring, protective gasket, safety valve body, safety valve core, elastic member, safety valve cap, third sealing ring, flow guide body;Safety valve body left side is connected in the safety valve mouth of pump head body, other end is connected on safety valve cap, safety valve cap connects flow guide body, protective gasket, second sealing ring, support gasket, first sealing ring are sequentially equipped on left passage;Safety valve core is sequentially equipped on right passage, safety valve core one end is provided with protective gasket, second sealing ring, support gasket, first sealing ring, elastic member one end is on safety valve core, other end is on safety valve cap, safety valve cap connects flow guide body, third sealing ring is equipped between safety valve cap and flow guide body. Structure is simpler, and pressure relief is stable and safe.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure plunger pump technology, and more specifically to a safety valve for a high-pressure plunger pump. Background Technology

[0002] In the prior art, high-pressure plunger pumps have been publicly sold and disclosed by the applicant in the market, and the applicant applied for a utility model patent with the State Intellectual Property Office on October 29, 2025 (application number: 202522285052.4). The specification of the utility model patent also clearly describes a high-pressure plunger pump with better performance. The high-pressure plunger pump includes an upper cover structure, a water inlet connector, a drain connector, a first one-way valve, a second one-way valve, an intermediate body, a high-pressure plunger pump body, and an overflow valve mechanism. The first water channel includes a first one-way valve installation water channel, which includes an annular wall and a lower annular wall. The first one-way valve includes several ribs arranged in an annular pattern, and the ribs have rib sidewalls. The annular wall includes an upper annular wall and a middle annular wall, and there is a water channel gap between the middle annular wall and the rib sidewalls. By setting a water channel gap between the middle annular wall and the rib sidewall, the rib sidewall of the first check valve is no longer blocked by the middle annular wall, increasing the flow area of ​​the liquid; the overall operation requirements of the liquid flowing into the pressurization chamber from the first check valve are effectively met, and the performance of the high-pressure plunger pump can be maximized.

[0003] However, the above-mentioned overflow valve mechanism is not only complex in structure, but also suffers from unstable pressure relief due to the conical structure of the valve core. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a safety valve for a high-pressure plunger pump, so as to overcome the defects of the existing high-pressure plunger pump, which has a complex overflow valve mechanism and unstable pressure relief due to the conical structure of the valve core.

[0005] To solve the above-mentioned technical problems, this utility model provides a safety valve for a high-pressure plunger pump. The safety valve is connected to the pump head body and communicates with the high-pressure flow channel of the pump head body. The safety valve includes a first sealing ring, a support gasket, a second sealing ring, a protective gasket, a safety valve body, a safety valve core, an elastic element, a safety valve cap, a third sealing ring, and a guide fluid. The left end of the safety valve body is connected to the safety valve port of the pump head body, and the other end is connected to the safety valve cap. The safety valve cap is connected to the guide fluid. The safety valve body has a left channel and a right channel. The left channel is provided with a protective gasket, a second sealing ring, a support gasket, and a first sealing ring in sequence. The right channel is provided with a safety valve core in sequence. One end of the safety valve core passes through the protective gasket, the second sealing ring, the support gasket, and the first sealing ring. One end of the elastic element abuts against the safety valve core, and the other end abuts against the safety valve cap. The safety valve cap is connected to the guide fluid, and a third sealing ring is provided between the safety valve cap and the guide fluid.

[0006] The safety valve core includes a valve core body, one end of which has a cylindrical structure with an axial pressure relief hole and a radial pressure relief hole.

[0007] The radial pressure relief hole penetrates the cylindrical structure.

[0008] The elastic element is a compression spring.

[0009] The safety valve port has a first internal thread, and the left side of the safety valve body has a first external thread that is helically connected to the first internal thread.

[0010] The safety valve body has a second external thread on its right side, and the safety valve cap has a second internal thread that is helically connected to the second external thread.

[0011] The high-pressure flow channel, left channel, right channel, safety valve cap channel, and fluid guide channel are interconnected.

[0012] The pump head body is made of stainless steel.

[0013] Compared with the prior art, the advantages of this utility model are that the structure is simpler and the pressure relief is more stable and safer.

[0014] In addition, the components of this utility model are connected by threads, making it easy to disassemble and maintain the safety valve during maintenance. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the high-pressure plunger pump of this utility model;

[0016] Figure 2 This is a first cross-sectional view of the high-pressure plunger pump of this utility model;

[0017] Figure 3This is a second cross-sectional view of the high-pressure plunger pump of this utility model;

[0018] Figure 4 This is a cross-sectional view of the safety valve of this utility model in the unpressurized state;

[0019] Figure 5 This is a cross-sectional structural diagram of the safety valve of this utility model in the depressurization state;

[0020] Figure 6 This is an exploded structural diagram of the safety valve of this utility model. Detailed Implementation

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0022] Compared with existing high-pressure plunger pumps, this embodiment eliminates the overflow valve mechanism installed on the intermediate body, replacing it with a simpler safety valve 1. This safety valve is externally mounted on the safety valve port 3 of the pump head body 2. The pump head body is made of stainless steel, and the safety valve port communicates with the high-pressure flow channel (i.e., the second water channel described in application number 202522285052.4) 4. Figures 1-6 As shown, the safety valve includes a first sealing ring 5, a support gasket 6, a second sealing ring 7, a protective gasket 8, a safety valve body 9, a safety valve core 10, a compression spring 11, a safety valve cap 12, a third sealing ring 13, and a guide fluid 14. The left end of the safety valve body is connected to the safety valve port of the pump head body, and the other end is connected to the safety valve cap. Specifically, the safety valve port has a first internal thread 15, and the left side of the safety valve body has a first external thread 16 that is helically connected to the first internal thread; the right side of the safety valve body has a second external thread 17, and the safety valve cap has a second internal thread 18 that is helically connected to the second external thread. The safety valve cap is transitionally connected to the guide fluid. In this embodiment, the pump head body, safety valve body, safety valve cap, and guide fluid are all connected by threads, making disassembly convenient and maintenance easy when the safety valve needs maintenance; furthermore, it achieves controllable safety valve pressure. Because the safety valve body and safety valve cap are connected by threads in this embodiment, the compression force of the compression spring can be controlled by the tightening depth of the threads, achieving pressure balance.

[0023] In this embodiment, the safety valve body has a left channel 21 and a right channel 22 for water flow. The left channel communicates with the high-pressure flow channel. From right to left, the left channel is provided with a protective gasket, a second sealing ring, a support gasket, and a first sealing ring. From left to right, the right channel is provided with a safety valve core, which includes a valve core body 23. One end of the valve core body has a cylindrical structure 24, on which an axial pressure relief hole 25 and a radial pressure relief hole 26 are provided. The radial pressure relief hole penetrates the cylindrical structure. The axial pressure relief hole communicates with the radial pressure relief hole, and the radial pressure relief hole communicates with the left channel. A protective gasket, a second sealing ring, a support gasket, and a first sealing ring are sequentially inserted through one end of the safety valve core. One end of a compression spring abuts against the safety valve core, and the other end abuts against the safety valve cap. A guide fluid is connected to the safety valve cap, and a third sealing ring is provided between the safety valve cap and the guide fluid. The third sealing ring provides a sealing function and a tight fit. The high-pressure flow channel, left channel, right channel, safety valve cap channel, and fluid guide channel are interconnected. For example... Figure 4 As shown, when the high-pressure plunger pump has no pressure relief requirement, the valve core is not affected by the water thrust and remains in its original position. At this time, the radial pressure relief hole is located 27 to the left of the second sealing ring. Figure 5 As shown, when the high-pressure plunger pump needs to release pressure due to rising water pressure, the valve core is affected by the thrust of the high-pressure water and moves to the right. At this time, the radial pressure relief hole is located on the right side 28 of the second sealing ring. The pressure-relieving water flows from the left channel into the right channel, the safety valve cap channel 19, and the guide channel 20 in sequence and is discharged in the specified direction. After the pressure relief is completed, the valve core is no longer affected by the thrust of the high-pressure water. At this time, the compression spring rebounds and pushes the valve core to move to the left until the valve core returns to its original position.

[0024] This embodiment has a simpler structure and more stable and safer pressure relief. After pressure relief, it can prevent the high-pressure plunger pump from bursting due to excessive pressure.

[0025] In this embodiment, the water is connected to a high-pressure water gun (not shown in the figure). The water first flows from the inlet connector into the first water channel of the pump head body, then through the first check valve, and then into the booster chamber. After being pressurized by the piston of the high-pressure plunger pump body, the water flows into the second check valve, then through the high-pressure flow channel, and finally into the drain connector, where it is sprayed out by the water gun. When the high-pressure water gun is turned off, the high-pressure plunger pump will continue to work, and the water pressure will continue to increase. At this time, the high-pressure water will push the safety valve to release pressure.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A safety valve for a high-pressure plunger pump, characterized in that: The safety valve is connected to the pump head body and communicates with the high-pressure flow channel of the pump head body. The safety valve includes a first sealing ring, a support gasket, a second sealing ring, a protective gasket, a safety valve body, a safety valve core, an elastic element, a safety valve cap, a third sealing ring, and a guide fluid. The left end of the safety valve body is connected to the safety valve port of the pump head body, and the other end is connected to the safety valve cap. The safety valve cap is connected to the guide fluid. The safety valve body has a left channel and a right channel. The left channel is provided with a protective gasket, a second sealing ring, a support gasket, and a first sealing ring in sequence. The right channel is provided with a safety valve core in sequence. One end of the safety valve core passes through the protective gasket, the second sealing ring, the support gasket, and the first sealing ring. One end of the elastic element abuts against the safety valve core, and the other end abuts against the safety valve cap. The guide fluid is connected to the safety valve cap, and a third sealing ring is provided between the safety valve cap and the guide fluid.

2. The safety valve for a high-pressure plunger pump according to claim 1, characterized in that: The safety valve core includes a valve core body, one end of which has a cylindrical structure, and the cylindrical structure is provided with an axial pressure relief hole and a radial pressure relief hole.

3. The safety valve for a high-pressure plunger pump according to claim 2, characterized in that: The radial pressure relief hole penetrates the cylindrical structure.

4. The safety valve for a high-pressure plunger pump according to claim 3, characterized in that: The elastic element is a compression spring.

5. The safety valve for a high-pressure plunger pump according to claim 1, characterized in that: The safety valve port has a first internal thread, and the left side of the safety valve body has a first external thread that is helically connected to the first internal thread.

6. The safety valve for a high-pressure plunger pump according to claim 5, characterized in that: The safety valve body has a second external thread on the right side, and the safety valve cap has a second internal thread that is helically connected to the second external thread.

7. The safety valve for a high-pressure plunger pump according to claim 1, characterized in that: The high-pressure flow channel, left channel, right channel, safety valve cap channel, and fluid guide channel are interconnected.

8. The safety valve for a high-pressure plunger pump according to claim 1, characterized in that: The pump head body is made of stainless steel.

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