Pressure relief valve for plunger pump
By designing a pressure relief valve for the plunger pump, the pressure in the high-pressure pipeline is released using the water hammer effect, which solves the problem of maintaining high pressure in the high-pressure pipeline when the spray gun is closed, extends service life and reduces energy consumption.
Patent Information
- Application Number
- CN202423321961.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The existing plunger pump maintains high pressure in the high-pressure pipeline even when the spray gun is closed, which reduces its service life, poses safety hazards, and results in serious energy waste.
Design a pressure relief valve for a plunger pump. Utilize the water hammer effect to drive the valve core to move, introducing high-pressure medium into the overflow channel to release pressure. The valve core assembly consists of a valve core, a cone valve, and a spring. Pressure release is achieved by connecting the overflow hole and the overflow port.
It effectively releases pressure in high-pressure pipelines, avoids high-pressure conditions when the spray gun is turned off, extends service life, and reduces energy consumption risks.
Smart Images
Figure CN223594411U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pressure relief valve, especially, relate to a pressure relief valve for plunger pump. BACKGROUND
[0002] The high pressure pump is used as the pressurizing element to convert low pressure fluid into high pressure fluid, and then the high pressure fluid is sprayed through the spraying part. In the cleaning machine industry, handheld spray guns are widely used as common spraying parts. When using the handheld spray gun, the user often frequently opens and closes the spray gun for intermittent operation. If the high pressure pump continues to deliver high pressure fluid when the spray gun is closed, a large amount of heat will be generated, and energy will be wasted. The common practice in the industry is to install a pressure regulating valve on the plunger pump. Through the water hammer effect when the user closes the spray gun, the valve core of the pressure regulating valve can automatically rise when the user closes the spray gun. In order to continuously raise the pressure regulating valve core, it is necessary to ensure that the pressure is maintained between the pressure regulating valve and the handheld spray gun. The defect of this structure is that if the user forgets to open the spray gun to release the pressure of the pipeline after using the cleaning machine, the high pressure pipeline will always maintain high pressure before the next start of the cleaning machine, which reduces the service life of the entire high pressure pipeline, and may cause safety hazards in severe cases. SUMMARY
[0003] Therefore, the utility model aims at providing a pressure relief valve for plunger pump with the characteristics of reasonable structure design.
[0004] In order to achieve the above purpose, the technical scheme of the utility model is as follows:
[0005] A pressure relief valve for plunger pump, comprising a valve body, a water passing channel is arranged through the inside of the valve body, the right end of the water passing channel is a water inlet, and the left end of the water passing channel is a water outlet; the water outlet is provided with a water outlet connector; a valve core assembly is arranged in the water passing channel; the valve core assembly comprises a valve core, a cone valve and a spring;
[0006] A flow passing channel is arranged through the left and right ends of the valve core; a water passing gap is formed between the side wall of the cone valve and the inner wall of the water passing channel;
[0007] A limiting ring table is arranged on the inner wall of the water passing channel, the cone valve and the spring are located on the left side of the limiting ring table, the valve core is located on the right side of the limiting ring table, and the cone valve and the valve core are detachably connected; one end of the spring abuts against the water outlet connector, and the other end abuts against the cone valve; the cone valve is used for plugging the limiting ring table;
[0008] An overflow port is arranged through one side of the valve body; an overflow hole communicating with the flow passing channel is arranged on the side wall of the valve core;
[0009] When the cone valve plugs the overflow hole of the limiting ring table, the overflow hole communicates with the overflow port.
[0010] Preferably, a plurality of sealing rings are nested on the side wall of the valve core and tightly contact the inner wall of the water passage.
[0011] Preferably, the water outlet connector is threadedly connected with the valve body.
[0012] Preferably, the left end of the valve core is provided with a threaded rod, the right end of the cone valve is provided with a threaded groove, and the threaded rod passes through the limiting ring table and cooperates with the threaded groove.
[0013] Preferably, the right end of the water outlet connector has a containing groove, one end of the spring extends into the containing groove and abuts against the groove bottom of the containing groove; the left end of the cone valve has a sleeve column, and the right end of the spring is sleeved on the sleeve column.
[0014] Preferably, the middle part of the limiting ring table is a conical surface.
[0015] Preferably, a plurality of grooves are circumferentially and spacedly arranged on the side wall of the cone valve, and the water gap is formed between the grooves and the side wall of the flow passage.
[0016] The technical effects of the utility model mainly lie in the following aspects:
[0017] When the user closes the handheld spray gun, the valve core is driven to move through the water hammer effect, the high-pressure medium is guided into the overflow passage to release the pressure of the entire high-pressure pipeline, thereby avoiding the problem that the high-pressure pipeline still maintains high pressure when the user closes the handheld spray gun. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is an exploded view of the pressure relief valve for the plunger pump in the embodiment.
[0019] Figure 2 It is a sectional view of the pressure relief valve for the plunger pump in the embodiment in a use state.
[0020] Figure 3 It is a sectional view of the pressure relief valve for the plunger pump in the embodiment in an overflow state.
[0021] Figure 4 It is a schematic view of the valve core in the embodiment.
[0022] Figure 5 It is a schematic view of the cone valve in the embodiment.
[0023] The reference signs are as follows: 1, valve body; 11, water passage; 12, limiting ring table; 13, overflow port; 2, water outlet connector; 3, valve core; 31, threaded rod; 32, flow passage; 33, overflow hole; 34, inclined hole; 4, cone valve; 41, threaded groove; 42, groove; 43, sleeve column; 5, spring; 6, sealing ring. DETAILED DESCRIPTION
[0024] The utility model discloses a further detailed description of the specific embodiment of the utility model in connection with the drawings, so that the utility model technical scheme is more easy to understand and grasp.
[0025] Referring Figures 1-5 The embodiment provides a pressure relief valve for plunger pump, including valve body 1 and valve core subassembly. Wherein, the inside of valve body 1 is provided with water passage 11, and the right end of water passage 11 is water inlet, and the left end of water passage 11 is water outlet. Water outlet is provided with water outlet joint 2, is used for connecting handheld spray gun, specifically, water outlet joint 2 is connected with valve body 1 by screw thread.
[0026] Valve core subassembly is set up in water passage 11, mainly including valve core 3, cone valve 4 and spring 5, wherein, the inner wall of water passage 11 is provided with limit ring table 12, can see, the middle part of limit ring table 12 has through-hole. Cone valve 4 and spring 5 are located at the left side of limit ring table 12, and valve core 3 is located at the right side of limit ring table 12. The right end of water outlet joint 2 has accommodating groove, and one end of spring 5 extends into the accommodating groove and abuts against the groove bottom of the accommodating groove, the left end of cone valve 4 has sleeve column 43, and the right end of spring 5 is sleeved on sleeve column 43 and abuts against cone valve 4. Cone valve 4 is mainly used for plugging the through-hole in the middle of limit ring table 12, in order to achieve better fit, the middle edge of limit ring table 12 is also provided with a tapered surface. Cone valve 4 and valve core 3 are detachably connected. More specifically, the left end of valve core 3 is provided with a threaded rod 31, and the right end of cone valve 4 is provided with a threaded groove 41, and the threaded rod 31 passes through the limit ring table 12 and cooperates with the threaded groove 41.
[0027] In addition, a plurality of sealing rings 6 are nested on the side wall of the valve core 3, which tightly contact the inner wall of the water passage 11 and provide a sealing effect. A flow passage 32 is formed between the left and right ends of the valve core 3, which is used for water to pass through. The flow passage 32 forms an inclined hole 34 near the threaded rod 31, which penetrates the end surface of the valve core 3 from one side of the threaded rod 31 to allow water to pass through.
[0028] A plurality of grooves 42 are circumferentially spaced apart on the side wall of the cone valve 4, and the grooves 42 form a water passage gap between the side wall of the water passage 11.
[0029] The side wall of the valve body 1 is provided with an overflow port 13, and the side of the valve core 3 facing the overflow port 13 is provided with an overflow hole 33 communicating with the flow passage 32. In this embodiment, the overflow hole 33 is provided as four, which are distributed in the circumferential direction of the valve core 3.
[0030] The working principle of the embodiment is as follows:
[0031] When the water inlet has water pressure, the valve core 3 is pushed to the left, the spring 5 is compressed, the through hole in the middle of the limiting ring table 12 is opened at this time, the overflow hole 33 is staggered with the overflow port 13. The water flows through the overflow channel 32, the through hole in the middle of the limiting ring table 12, and the water gap in sequence and then flows out from the water outlet connector 2. When the user closes the handheld spray gun, the valve core 3 is driven to move to the right through the water hammer effect until the cone valve 4 contacts the limiting ring table 12. At this time, the overflow hole 33 is communicated with the overflow port 13, and the high-pressure water is introduced into the overflow port 13, thereby releasing the pressure of the entire high-pressure pipeline to avoid the problem that the high-pressure pipeline still maintains high pressure when the user closes the handheld spray gun.
[0032] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific implementation manners, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.
Claims
1. A pressure relief valve for a plunger pump, comprising a valve body (1), a water passage (11) is provided through the inside of the valve body (1), and the right end of the water passage (11) is a water inlet, and the left end of the water passage (11) is a water outlet; the water outlet is provided with a water outlet joint (2); a valve core assembly is arranged in the water passage (11); characterized in that, The valve core assembly comprises a valve core (3), a cone valve (4) and a spring (5); A through flow channel (32) is arranged between the left and right ends of the valve core (3); a water flow gap is formed between the side wall of the cone valve (4) and the inner wall of the water flow channel (11); A limiting ring table (12) is arranged on the inner wall of the water flow channel (11), the cone valve (4) and the spring (5) are located on the left side of the limiting ring table (12), the valve core (3) is located on the right side of the limiting ring table (12), and the cone valve (4) and the valve core (3) are detachably connected; one end of the spring (5) abuts against the water outlet connector (2), and the other end abuts against the cone valve (4); the cone valve (4) is used for plugging the limiting ring table (12); An overflow port (13) is arranged on one side of the valve body (1); an overflow hole (33) in communication with the through flow channel (32) is arranged on the side wall of the valve core (3); When the cone valve (4) plugs the limiting ring table (12) overflow hole, the overflow hole (33) is in communication with the overflow port (13).
2. A pressure relief valve for a piston pump according to claim 1, characterized in that A plurality of sealing rings (6) are nested on the side wall of the valve core (3), and the sealing rings (6) are in close contact with the inner wall of the water flow channel (11).
3. A pressure relief valve for a piston pump according to claim 1, characterized in that The water outlet connector (2) is threadedly connected with the valve body (1).
4. A pressure relief valve for a piston pump according to claim 1, characterized in that A threaded rod (31) is arranged at the left end of the valve core (3), a threaded groove (41) is arranged at the right end of the cone valve (4), and the threaded rod (31) passes through the limiting ring table (12) and cooperates with the threaded groove (41).
5. The pressure relief valve for a piston pump of claim 1 wherein, The right end of the water outlet connector (2) has a containing groove, one end of the spring (5) extends into the containing groove and abuts against the groove bottom of the containing groove; the left end of the cone valve (4) has a sleeve column (43), and the right end of the spring (5) is sleeved on the sleeve column (43).
6. A pressure relief valve for a piston pump as defined in claim 1, characterized in that The middle edge of the limiting ring table (12) is a conical surface.
7. A pressure relief valve for a piston pump as defined in claim 1, wherein A plurality of grooves (42) are arranged on the side wall of the cone valve (4) at intervals in the circumferential direction, and the water flow gap is formed between the side wall of the through flow channel (32) and the grooves (42).