Pressure regulating valve and pressure regulating overflow device

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a pressure regulating valve and a pressure regulating overflow device, which comprise a valve main body, a valve cavity arranged in the valve main body, a valve core and a spring arranged in the valve cavity, the spring arranged between the valve main body and the valve core, and a fluid inlet channel and a fluid outlet channel communicated with the valve cavity arranged on the valve main body. A valve rod is movably arranged at the end, close to the spring, of the valve element and connected to the valve body in a threaded mode, the upper end of the valve rod extends out of the valve body, the valve rod is sleeved with the spring, and the valve element is pressed on the overflow hole through the spring. The valve rod is connected to the valve element, the valve rod can lift the valve element by rotating the valve rod so that the regulating valve can autonomously select to release pressure, and due to the fact that the valve rod is movably connected to the valve element, when the valve element is jacked up when the pressure is too high, the valve element can move, and the situation that the valve element cannot be jacked up even if the valve rod is connected to the valve element is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a pressure regulating valve and a pressure regulating overflow device. Background Art

[0002] Pipelines are the main equipment for transporting gas or liquid. When transporting gas and liquid, it is generally necessary to control the flow rate of liquid or gas. At the same time, when using compressors or cylinders, it is necessary to control the pressure of hydraulic oil. The pressure regulating valve is the main device for regulating the flow and pressure of gas or liquid. There are many types of pressure regulating valves in the prior art and they are widely used. However, most of them have complex structures and are inconvenient to adjust. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and to provide a pressure regulating valve and a pressure regulating overflow device which are simple in structure and convenient to adjust, and can automatically adjust the pressure of the fluid in real time.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a pressure regulating valve, including a valve body, a valve cavity is arranged in the valve body, a valve core and a spring are arranged in the valve cavity, the spring is arranged between the valve body and the valve core, and an inlet fluid channel and an outlet fluid channel connected to the valve cavity are also arranged on the valve body, a valve stem is movably arranged at one end of the valve core close to the spring, the valve stem is threadedly connected to the valve body, the upper end of the valve stem extends out of the valve body, the spring is sleeved on the outside of the valve stem, and the valve core is pressed against the overflow hole by the spring.

[0005] Preferably, the fluid outlet channel is connected to one side of the valve cavity, and the fluid inlet channel is connected to the end of the valve cavity through an overflow hole.

[0006] Preferably, a connecting block is arranged at one end of the valve core close to the valve stem, the end of the valve stem is slidably arranged in the connecting block, and the spring is arranged between the connecting block and the valve body.

[0007] Preferably, a sealing surface is provided at one end of the valve core close to the overflow hole, and a sealing surface is correspondingly provided at one end of the overflow hole close to the valve core.

[0008] Preferably, the valve body comprises a valve cover and a valve body which are separately arranged.

[0009] A pressure regulating overflow device comprises a pressure relief pipeline and a supplementary pipeline connected to a supplementary tank, the pressure regulating valve is connected to the pressure reducing pipeline, and a one-way valve is arranged on the supplementary pipeline.

[0010] Preferably, the pressure relief pipeline is connected to the upper part of the supplementary tank, and the supplementary pipeline is connected to the lower part of the supplementary tank.

[0011] Preferably, the fluid outlet passage of the pressure regulating valve is arranged close to the replenishing tank.

[0012] Compared with the prior art, the above technical solution has the following beneficial effects:

[0013] 1. The pressure regulating valve is connected to the transport pipeline or the oil cylinder. When the pressure of the fluid is too high, the fluid pressure will lift the valve core, and the fluid will flow out through the overflow hole to relieve the pressure, thereby preventing safety problems caused by excessive fluid pressure. When the fluid pressure is reduced to a fixed requirement, the fluid pressure will no longer lift the valve core, and the spring will restore its deformation to press the valve core against the overflow hole again to prevent further leakage of the fluid. The utility model has a simple structure and can automatically adjust the pressure of the fluid in real time. The adjustment is more convenient and reduces safety problems caused by excessive fluid pressure. A valve stem is connected to the valve core. By turning the valve stem, the valve stem can lift the valve core so that the regulating valve can autonomously choose to relieve pressure. Since the valve stem is movably connected to the valve core, the valve core can be movable when the valve core is lifted when the pressure is too high, and the valve stem connected to the valve core will not cause the valve core to be unable to be lifted.

[0014] 2. The pressure regulating valve is installed on the pressure reducing pipeline to reduce the pressure of the fluid. When the fluid pressure is too low, the fluid is replenished into the transport pipeline or the oil cylinder through the replenishing pipeline. The one-way valve allows the fluid to enter the transport pipeline or the oil cylinder only from the replenishing tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the pressure regulating valve.

[0016] Figure 2 It is a schematic diagram of the structure of the regulating device.

[0017] Among them: 1, valve body 2, valve stem 3, spring 4, valve core 5, twist handle 6, fluid outlet channel 7, fluid inlet channel 8, overflow hole 9, connecting block 10, valve cavity 11, replenishing pipeline 12, one-way valve 13, pressure relief pipeline 14, pressure regulating valve 15, replenishing box. DETAILED DESCRIPTION

[0018] Figure 1~2 It is the best embodiment of the utility model, and the following Figure 1~2 The utility model is further described.

[0019] like Figure 1As shown, a pressure regulating valve of the utility model comprises a valve body 1, a valve cavity 10 is arranged in the valve body 1, a valve core 4 and a spring 3 are arranged in the valve cavity 10, the spring 3 is arranged between the valve body 1 and the valve core 4, an inlet fluid channel 7 and an outlet fluid channel 6 are also processed on the valve body 1, a valve stem 2 is movably connected to one end of the valve core 4 close to the spring 3, the valve stem 2 is threadedly connected to the valve cover at the upper end of the valve body 1, the upper end of the valve stem 2 extends out of the valve body 1, the spring is sleeved outside the valve stem 2, and the spring 3 presses the valve core 4 to the overflow On the hole 8, the fluid enters from the fluid inlet channel 7, and the high-pressure fluid pushes the valve core 4 upward. After the valve core 4 is pushed up, the overflow hole 8 is opened, and the fluid flows out from the overflow hole 8 to release the pressure. After the adjustment is completed, the spring 3 recovers its deformation and presses the valve core 4 against the overflow hole 8 again; by rotating the valve stem 2, the valve stem 2 can lift the valve core 4 so that the regulating valve 14 can independently choose to release the pressure. Since the valve stem 2 is movably connected to the valve core 4, when the pressure is too high, the valve core 4 can be movable, and the valve stem 2 connected to the valve core 4 will not cause the valve core 4 to be unable to be pushed up.

[0020] The valve body 1 includes a valve cover and a valve body which are separately arranged. The valve cavity 10 is processed on the valve body at the lower end, and the valve cover is fixedly connected to the upper end of the valve body, which is convenient for processing the valve cavity 10 and installing the valve core 4 and the spring 3.

[0021] Specifically, the fluid inlet channel 7 and the fluid outlet channel 6 are connected to the valve cavity 10, the fluid outlet channel 6 is connected to one side of the valve cavity 10, the fluid inlet channel 7 is connected to the lower end of the valve cavity 10 through the overflow hole 8, a connecting block 9 is provided at one end of the valve core 4 close to the valve stem 2, a cavity is provided in the middle of the connecting block 9, a sliding mounting portion is provided at the lower end of the valve stem 2, the sliding mounting portion is slidably arranged in the cavity of the connecting block 9, and the spring 3 is arranged between the connecting block 9 and the valve body 1. In this embodiment, a twisting handle 5 is also provided at the upper end of the valve stem 2. When manual pressure relief is required, the twisting handle 5 is turned, and the valve stem 2 moves upward, thereby driving the valve core 4 to move upward, so that the valve stem 2 leaves the overflow hole 8. At the same time, since the lower end of the valve stem 2 is slidably connected to the valve core 4, it does not affect the valve core 4 from being pushed open when the fluid pressure is too large. When the valve core 4 is pushed open, the connecting block 9 slides upward along the lower end of the valve stem 2.

[0022] In this embodiment, a sealing surface is provided at one end of the valve core 4 close to the overflow hole 8, and a sealing surface is also provided at one end of the overflow hole 8 close to the valve core 4, so that the sealing between the valve core 4 and the overflow hole 8 can be better.

[0023] like Figure 2As shown, a pressure regulating overflow device includes a pressure relief pipeline 13 and a supplementary pipeline 11 connected to a supplementary tank 15. The above-mentioned pressure regulating valve 14 is connected to the pressure relief pipeline 13. A one-way valve 12 is arranged on the supplementary pipeline 11. The pressure regulating valve 14 is arranged on the pressure relief pipeline 13 to reduce the pressure of the fluid. When the fluid pressure is too low, the fluid is supplemented to the transport pipeline or the oil cylinder through the supplementary pipeline 11. The one-way valve 12 allows the fluid to enter the transport pipeline or the oil cylinder only from the supplementary tank 15.

[0024] The pressure relief pipeline 13 is connected to the upper part of the supplementary tank 15 , the supplementary pipeline 11 is connected to the lower part of the supplementary tank 15 , and the outlet fluid channel 6 of the pressure regulating valve 14 is arranged close to the supplementary tank 15 .

[0025] When the utility model is in use, when the fluid pressure in the transport pipeline or the oil cylinder is too low, the fluid in the supplementary box 15 is sucked into the transport pipeline or the oil cylinder through the one-way valve 12 to supplement the fluid pressure; when the fluid pressure in the transport pipeline or the oil cylinder is too high, the fluid enters the fluid inlet channel 7 of the regulating valve 14, the high-pressure fluid lifts the valve core 4, and the fluid flows into the supplementary box 15 through the overflow hole 8 and the regulating valve 14, thereby achieving pressure reduction. The utility model has a simple structure and can automatically adjust the fluid pressure in real time, making the adjustment more convenient and reducing safety problems caused by excessive fluid pressure.

[0026] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A pressure regulating valve, comprising a valve body (1), wherein a valve chamber (10) is arranged in the valve body (1), characterized in that: A valve core (4) and a spring (3) are arranged in the valve cavity (10). The spring (3) is arranged between the valve body (1) and the valve core (4). The valve body (1) is also provided with an inlet fluid channel (7) and an outlet fluid channel (6) which are connected to the valve cavity (10). A valve stem (2) is movably arranged at one end of the valve core (4) close to the spring (3). The valve stem (2) is threadedly connected to the valve body (1). The upper end of the valve stem (2) protrudes out of the valve body (1). The spring is sleeved on the outside of the valve stem (2). The valve core (4) is pressed against the overflow hole (8) by the spring (3).

2. A pressure regulating valve according to claim 1, characterized in that: The fluid outlet channel (6) is connected to one side of the valve chamber (10), and the fluid inlet channel (7) is connected to the end of the valve chamber (10) through an overflow hole (8).

3. A pressure regulating valve according to claim 1, characterized in that: A connecting block (9) is arranged at one end of the valve core (4) close to the valve stem (2); the end of the valve stem (2) is slidably arranged in the connecting block (9); and the spring (3) is arranged between the connecting block (9) and the valve body (1).

4. A pressure regulating valve according to claim 1, characterized in that: A sealing surface is provided at one end of the valve core (4) close to the overflow hole (8), and a sealing surface is also provided correspondingly at one end of the overflow hole (8) close to the valve core (4).

5. A pressure regulating valve according to claim 1, characterized in that: The valve body (1) comprises a valve cover and a valve body which are arranged separately.

6. A pressure regulating overflow device, characterized in that: It comprises a pressure relief pipeline (13) and a replenishing pipeline (11) connected to a replenishing tank (15), the pressure regulating valve (14) according to any one of claims 1 to 5 being connected to the pressure relief pipeline (13), and a one-way valve (12) being arranged on the replenishing pipeline (11).

7. A pressure regulating overflow device according to claim 6, characterized in that: The pressure relief pipeline (13) is connected to the upper part of the replenishing tank (15), and the replenishing pipeline (11) is connected to the lower part of the replenishing tank (15).

8. A pressure regulating overflow device according to claim 6, characterized in that: The fluid outlet passage (6) of the pressure regulating valve (14) is arranged close to the replenishing tank (15).

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