Pressure regulating valve

Abstract

The utility model relates to a pressure regulating valve, which is characterized in that a valve seat is fixedly arranged in a second outlet, a valve body is fixedly arranged on a valve block above the valve seat, a valve core is mounted on the valve body in a manner of moving up and down through a sealing assembly, and the sealing assembly consists of a first sealing element and a second sealing element which are mounted on the valve core in parallel at an interval; the lower end of the valve element extends out of the valve body and is matched with the valve seat to form a sealing face, the gland nut is screwed on the valve body to be fixed, the adjusting screw is screwed into the gland nut to be freely screwed and unscrewed, the disc spring is installed in the valve body, and the two opposite ends of the disc spring act on the adjusting screw and the valve element respectively. According to the pressure regulating valve, compact design is achieved through cooperative work of the valve block, the valve seat, the valve element and the valve body, the pressure regulating valve is used for regulating and stabilizing the output pressure of high-pressure water, fatigue resistance of the pressure regulating valve is improved through the design of the disc spring, and reliability and usability of equipment are improved; the sealing performance is improved through double sealing of the first sealing piece and the second sealing piece, and the safety and efficiency of the system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a water system, more particularly to a pressure regulating valve. BACKGROUND

[0002] In the field of water physical cleaning, high-pressure water cleaning equipment is widely used due to its high cleaning efficiency and good effect. In these devices, maintaining stable cleaning pressure is crucial to ensure cleaning effect. Especially in the case where the flow is greater than 50 liters per minute and the pressure is greater than 6 MPa, the cleaning equipment needs to work stably and reliably. As a key component in the water system, the performance of the pressure regulating valve directly affects the stability and efficiency of the cleaning equipment. However, the traditional pressure regulating valve has problems such as heavy structure, low reliability, seal failure, and low working efficiency. SUMMARY

[0003] In order to solve the problems of seal failure in the above-mentioned prior art pressure regulating valve, the utility model provides a pressure regulating valve.

[0004] According to the pressure regulating valve of the utility model, it includes valve block, valve seat, valve core, valve body, sealing assembly, disc spring, gland nut and adjusting screw, wherein the valve block provides an inlet, a first outlet and a second outlet, the valve seat is fixedly arranged in the second outlet, the valve body is fixedly arranged on the valve block above the valve seat, the valve core is movably installed on the valve body through the sealing assembly, the sealing assembly is composed of first and second seals installed on the valve core in parallel and spaced apart from each other, the lower end of the valve core extends from the valve body and cooperates with the valve seat to form a sealing surface, the gland nut is screwed on the valve body to be fixed, the adjusting screw is screwed into the gland nut to be freely tightened or loosened, the disc spring is installed inside the valve body, and the opposite ends of the disc spring act on the adjusting screw and the valve core respectively.

[0005] In the preferred embodiment, the disc spring is a sheet-shaped butterfly spring.

[0006] In the preferred embodiment, the first and second seals are O-rings installed through the retaining ring.

[0007] In the preferred embodiment, the inlet and the first outlet are opposite to each other, and the second outlet is located between the inlet and the first outlet.

[0008] In the preferred embodiment, the inlet is connected to the water outlet of the high-pressure pump, the first outlet is connected to the nozzle, and the second outlet is connected to the water return tank.

[0009] In the preferred embodiment, the water pressure acting on the annular area of the valve core and the pre-tightening pressure of the disc spring are balanced with each other.

[0010] In a preferred embodiment, the valve core and the valve seat contact form a first sealing diameter D1, the sealing assembly generates a second sealing diameter D2, the pressure P is formed in the passage of the inlet and the first outlet, the pre-pressing force F1 of the disc spring = P x 1 / 4 x π x (D2-D1).

[0011] According to the pressure regulating valve of the utility model, the compact design is realized through the cooperative work of the valve block, the valve seat, the valve core and the valve body, the output pressure of the high-pressure water is adjusted and stabilized, the fatigue resistance of the pressure regulating valve can be adjusted by the disc spring, the risk of fracture is reduced and the reliability and ease of use of the equipment are improved, the double sealing of the first and second sealing members can improve the sealing performance, and the safety and efficiency of the system are improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the whole structure schematic diagram of the pressure regulating valve according to a preferred embodiment of the utility model.

[0013] Figure 2 Show Figure 1 The water flow direction of the pressure regulating valve. DETAILED DESCRIPTION

[0014] The preferred embodiment of the utility model is given below in combination with the drawings, and is described in detail.

[0015] As Figure 1 shown, the pressure regulating valve according to a preferred embodiment of the utility model comprises a valve block 1, a valve seat 2, a valve core 3 and a valve body 6. The valve block 1 is the basic support of the whole pressure regulating valve, provides an inlet 11, a first outlet 12 and a second outlet 13, wherein the inlet 11 and the first outlet 12 are opposite to each other, and the second outlet 13 is located between the inlet 11 and the first outlet 12. The valve seat 2 is fixedly arranged in the second outlet 13 of the valve block 1. The valve body 6 is located above the valve seat 2 and is fixedly arranged on the valve block 1. The valve core 3 is sealingly installed on the valve body 6 and can move up and down, the lower end of the valve core 3 extends from the valve body 6 and cooperates with the valve seat 2 to form a sealing surface, and controls the on-off of the water flow. Specifically, when the valve core 3 is in close contact with the valve seat 2, the passage of the second outlet 13 is closed, and the water flow flows from the inlet 11 to the first outlet 12. When the valve core 3 is away from the valve seat 2, the water flow can also flow out through the second outlet 13, which is used for releasing excess pressure or returning water.

[0016] As Figure 1As shown, the pressure regulating valve comprises a sealing assembly consisting of first and second seals 4, 5, which are installed on the valve core 3 in parallel and spaced apart from each other. The two seals 4, 5 can ensure the sealing installation of the valve core 3 on the valve body 6, effectively preventing fluid leakage. In the utility model, the first and second seals 4, 5 are O-rings installed by a retainer ring. Compared with a Garter spring or a Y-shaped ring, the O-ring used in the utility model shows higher stability and reliability in high-pressure and high-speed applications. The O-ring has better elasticity and adaptability, can compensate for the irregularity of the mating surface, and reduce wear. In addition, the double-seal can also provide additional security. Even if one seal fails, the other seal can still maintain sealing to prevent fluid leakage, which can further improve the reliability and safety of the pressure regulating valve.

[0017] As shown, Figure 1 The pressure regulating valve also comprises a disc spring 7, a gland nut 8 and an adjusting screw 9. The gland nut 8 is screwed on the valve body 6 to provide a fixed point for the adjusting screw 9. The adjusting screw 9 is screwed into the gland nut 8 to be freely tightened or loosened, i.e. to be freely adjusted in height. The disc spring 7 is installed inside the valve body 6, with its bottom in contact with the valve core 3 and its top in contact with the adjusting screw 9. When the adjusting screw 9 is rotated, the adjusting screw 9 will compress or relax the disc spring 7. Since the disc spring 7 is in contact with the valve core 3, this compression or relaxation action will change the pre-tightening downward pressure F1 between the valve core 3 and the valve seat 2. Specifically, when the adjusting screw 9 is tightened, the disc spring 7 is compressed, increasing the pushing force on the valve core 3, and the valve core 3 is pressed more tightly against the valve seat 2, thereby increasing the pre-tightening downward pressure F1; when the adjusting screw 9 is loosened, the pushing force of the disc spring 7 on the valve core 3 decreases, and the pre-tightening downward pressure F1 between the valve core 3 and the valve seat 2 also decreases. In this way, the tension of the disc spring 7 is directly related to the pre-tightening downward pressure F1. In the utility model, the disc spring 7 is a sheet-shaped butterfly spring. Compared with a traditional steel spring, the sheet-shaped butterfly spring can make the pressure regulating valve more accurately adjust the working pressure of high-pressure water, and improve its working performance and reliability.

[0018] In the initial state, the inlet 11 is connected to the outlet of the high-pressure pump, the first outlet 12 is connected to a nozzle (e.g. a small aperture nozzle), and the second outlet 13 is connected to a water tank. Tighten the adjusting screw 9, the adjusting screw 9 presses the disc spring 7, the disc spring 7 presses the valve core 3, the valve core 3 and the valve seat 2 form a first sealing diameter D1, and the first and second seals 4, 5 form a second sealing diameter D2.

[0019] When the water pressure arrives, the water pressure force F2 is formed on the annular area of the valve core 3, the pressure P is formed in the channels of the inlet 11 and the first outlet 12, and the pressure in the channel of the second outlet 13 is zero (or lower) by default, and the pre-tightening down force F1 of the disc spring 7 is determined by the water pressure P and the sealing diameters D1 and D2, and the calculation formula is F1 = P x 1 / 4 x pi x (D2-D1). When the water pressure F2 is greater than or equal to the pre-tightening down force F1, the disc spring 7 is contracted, the valve core 3 is moved upward, a certain opening is formed between the valve core 3 and the valve seat 2, and the water flows from the inlet 11 to the second outlet 13 to be discharged, thereby discharging part of the water pressure. This causes the pressure in the channels of the inlet 11 and the first outlet 12 to drop until the water pressure F2 and the pre-tightening down force F1 reach a balance, thereby keeping the pressure of the pressure regulating valve stable. When the water pressure F2 is less than the pre-tightening down force F1, the valve core 3 falls back onto the valve seat 2, no opening is formed, the pressure regulating valve is closed, and it does not work. In this way, by adjusting the size of the pre-tightening down force F1 of the disc spring 7, the size of the working pressure of the high-pressure water can be adjusted.

[0020] In the actual working process of the pressure regulating valve, the pressure water flow may be frequently cut off, and the pressure water flow output by the water pump is usually pulsating, causing fluctuations in the working water pressure. Such pulsation and fluctuation cause the valve core 3 to be in a state of high-frequency oscillation and multiple sliding, which needs to constantly respond to changes in the water pressure to open or close the water flow channel. Due to such frequent movement of the valve core 3, the disc spring 7 in contact with it also experiences frequent compression and release. The utility model selects the disc spring 7 as a sheet-shaped butterfly spring to cope with such repeated cyclic stress, avoiding fatigue failure or even rupture that may be caused by conventional compression components, thereby ensuring normal operation of the entire system. Moreover, the compression assembly of the utility model adds the second sealing member 5 to cope with damage caused by such alternating stress, thereby improving the reliability of the pressure regulating valve and prolonging the service life. In particular, the first and second sealing members 4 and 5 of the utility model are selected as O-rings, which utilize their rolling characteristics to improve the rapid responsiveness of the pressure regulating valve in operation. Such characteristics enable the sealing member to maintain good sealing performance in the high-frequency oscillation and sliding of the valve core 3, reduce wear and tear, and help prevent system overload, thereby facilitating long-term effective operation of the equipment. Therefore, the pressure regulating valve of the utility model can better adapt to the pulsation and fluctuation of the pressure water flow, improve its stability and reliability, and ensure effective control of the water flow and pressure under various working conditions. These design improvements can significantly improve efficiency and reduce maintenance costs in practical applications such as high-pressure water cleaning equipment.

[0021] The above merely describes preferred embodiments of the present application, and is not intended to limit the scope of the present application, and the above embodiments of the present application can be variously changed. That is, simple, equivalent changes and modifications made according to the content of the claims and the specification of the present application fall within the scope of the claims of the present application. The present application is not described in detail, and is conventional technical content.

Claims

1. A pressure regulating valve characterized by, The pressure regulating valve comprises a valve block, a valve seat, a valve core, a valve body, a sealing assembly, a disc spring, a gland nut and an adjusting screw, wherein the valve block is provided with an inlet, a first outlet and a second outlet, the valve seat is fixedly arranged in the second outlet, the valve body is fixedly arranged on the valve block above the valve seat, the valve core is movably arranged on the valve body through the sealing assembly, the sealing assembly is composed of first and second sealing members which are arranged on the valve core in parallel, the lower end of the valve core extends from the valve body to cooperate with the valve seat to form a sealing surface, the gland nut is screwed on the valve body to be fixed, the adjusting screw is screwed into the gland nut to be freely tightened or loosened, the disc spring is arranged inside the valve body, and the opposite ends of the disc spring act on the adjusting screw and the valve core respectively.

2. The pressure regulating valve of claim 1, wherein The disc spring is a sheet-shaped butterfly spring.

3. The pressure regulating valve of claim 1, wherein The first and second sealing members are O-shaped rings which are arranged through the retaining rings.

4. The pressure regulating valve of claim 1, wherein The inlet and the first outlet are opposite to each other, and the second outlet is located between the inlet and the first outlet.

5. The pressure regulating valve of claim 1, wherein The inlet is connected with the outlet of the high-pressure pump, the first outlet is connected with the nozzle, and the second outlet is connected with the water return tank.

6. The pressure regulating valve of claim 1, wherein The water pressure acting on the annular area of the valve core is balanced with the pre-tightening down pressure of the disc spring.

7. The pressure regulating valve of claim 6, wherein The valve core and the valve seat contact to form a first sealing diameter D1, the sealing assembly generates a second sealing diameter D2, the passage of the inlet and the first outlet forms a pressure P, and the pre-tightening down pressure F1 of the disc spring is P×1 / 4×π×(D2-D1).

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