Stainless steel pressure reducing valve

Abstract

The utility model relates to the technical field of pressure reducing valves, and discloses a stainless steel pressure reducing valve which comprises a valve body, a gasket seat is arranged at the inner bottom of the valve body, a gasket is arranged above the gasket seat, a movable valve rod is in threaded connection with the interior of the gasket seat, and a spring is arranged on the top of the movable valve rod in a sleeved mode. An adjusting nut is arranged on the inner side of the top of the valve body, a valve bonnet is fixedly connected to the upper portion of the valve body, a decorative cover is arranged on the top of the valve bonnet, first blocking caps are installed on the left side and the right side of the valve body correspondingly, and a second blocking cap is installed at the bottom of the valve body. According to the utility model, fluid pushes the movable valve rod to enable the spring to stretch out and draw back, so that the flow of the fluid is adjusted, the stability of the pressure in a system is maintained, meanwhile, the pressure loss is small, the flow is large, the generated noise is low, the outlet pressure is continuously stable and unchanged, and the valve has higher corrosion resistance, safety, application range and service life.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure reducing valves, in particular to a stainless steel pressure reducing valve. Background Art

[0002] A pressure reducing valve is a valve device used to control and regulate system pressure. It is usually installed in a liquid or gas system. When the system pressure exceeds the set value, the pressure reducing valve will open and release part of the medium to reduce the system pressure and protect the system from damage caused by excessive pressure. Pressure reducing valves are usually used in HVAC, air conditioning equipment, water purification systems, air compression systems, mechanical equipment, and systems with corrosive media. They have stable structures, strong corrosion resistance, and good high temperature resistance.

[0003] When the existing pressure reducing valve has high or low pressure at the inlet, the pressure at the outlet of the pressure reducing valve is unstable and the pressure loss is too large, resulting in the inability to reach the flow rate, and thus failing to meet the standard pressure loss flow rate requirements. At the same time, the noise is loud during use, affecting the user experience. In view of the above problems, the technicians in this field have proposed a stainless steel pressure reducing valve to solve the above problems. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a stainless steel pressure reducing valve, which aims to improve the problem in the prior art that when high pressure or low pressure appears at the pressure reducing valve inlet, the pressure reducing valve outlet pressure is unstable and the pressure loss is large, resulting in the inability to reach the flow rate.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a stainless steel pressure reducing valve, comprising a valve body, a gasket seat is arranged at the inner bottom of the valve body, a gasket is arranged above the gasket seat, a movable valve stem is connected to the internal thread of the gasket seat, a spring is sleeved on the top of the movable valve stem, an adjusting nut is arranged on the inner side of the top of the valve body, a valve cap is fixedly connected to the top of the valve body, a decorative cover is arranged on the top of the valve cap, a first blocking cap is installed on the left and right sides of the valve body, and a second blocking cap is installed on the bottom of the valve body.

[0006] Furthermore, the outside of the gasket seat is slidably connected to the inner wall of the second blocking cap, a fourth O-ring is arranged in the bottom groove of the gasket seat, and the outside of the fourth O-ring fits with the inner side of the second blocking cap.

[0007] Furthermore, a filter screen is installed on the top of the second blocking cap near the gasket.

[0008] Furthermore, a second O-ring is arranged in the outer groove of the top of the movable valve stem, the outer portion of the second O-ring fits with the inner portion of the valve body, and the second O-ring and the fourth O-ring are both made of NBR.

[0009] Furthermore, the model of the adjusting nut is M17, and the top of the spring is sleeved on the outside of the bottom of the adjusting nut.

[0010] Furthermore, first O-rings are disposed on the inner sides of the left and right side interfaces of the valve body, and a third O-ring is disposed on the inner side of the bottom interface of the valve body. The materials of the first O-ring and the third O-ring are both EPDM.

[0011] Furthermore, the overall width of the valve body is 75.5 mm, and the inlet and outlet dimensions of the valve body are 2-G3 / 4.

[0012] The utility model has the following beneficial effects:

[0013] 1. In the utility model, the spring is expanded and contracted by the fluid pushing the movable valve stem, thereby adjusting the flow of the fluid and maintaining the stability of the pressure in the system. At the same time, the pressure loss is small, the flow is large, the noise generated is low, and the outlet pressure is continuously stable. It also has high corrosion resistance, safety, scope of application and life.

[0014] 2. In the utility model, by setting the first plugging cap on the valve body, a double pressure gauge interface (front and rear end pressure gauges) and a single pressure gauge interface (rear end pressure gauge) can be connected, thereby facilitating direct reading of the inlet pressure and the outlet pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of the stainless steel pressure reducing valve proposed by the utility model;

[0016] Figure 2 This is a sectional view of the valve body of the stainless steel pressure reducing valve proposed by the utility model.

[0017] Legend:

[0018] 1. Decorative cover; 2. Valve bonnet; 3. Adjusting nut; 4. Spring; 5. First plugging cap; 6. First O-ring; 7. Second O-ring; 8. Valve body; 9. Movable valve stem; 10. Filter screen; 11. Gasket; 12. Gasket seat; 13. Third O-ring; 14. Fourth O-ring; 15. Second plugging cap. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Reference Figure 1-Figure 2The utility model provides an embodiment: a stainless steel pressure reducing valve, comprising a valve body 8, a gasket seat 12 is provided at the inner bottom of the valve body 8, a gasket 11 is provided above the gasket seat 12, a movable valve stem 9 is connected to the gasket seat 12 through internal threads, a spring 4 is sleeved on the top of the movable valve stem 9, an adjusting nut 3 is provided on the inner side of the top of the valve body 8, a valve cap 2 is fixedly connected to the top of the valve body 8, a decorative cover 1 is provided on the top of the valve cap 2, a first blocking cap 5 is installed on both sides of the valve body 8, a second blocking cap 15 is installed at the bottom of the valve body 8, the outer part of the gasket seat 12 is slidably connected to the inner side wall of the second blocking cap 15, a fourth O-ring 14 is provided in the bottom groove of the gasket seat 12, the outer part of the fourth O-ring 14 is fitted with the inner side of the second blocking cap 15, a second O-ring 7 is provided in the outer groove of the top of the movable valve stem 9, the outer part of the second O-ring 7 is fitted with the inner part of the valve body 8, and the material of the second O-ring 7 and the fourth O-ring 14 are both NBR.

[0021] Specifically, the valve body 8 can be connected to the pipeline through the interfaces at the left and right ends, which is convenient for installation and use. It has a wide range of applications and can be applied to different working conditions such as fluid media, pipeline sizes and fluid temperatures. It has strong adaptability. The spring 4 can be pressurized by adjusting the nut 3 to push the movable valve stem 9 to move. The pressure in the valve can be adjusted by changing the position of the sliding valve stem 9. The top of the pressure reducing valve can be closed by the decorative cover 1 to protect the internal mechanism of the pressure reducing valve from dust, debris and other contaminants, thereby extending the service life of the pressure reducing valve. The interfaces on the left and right sides of the valve body 8 are closed by the first plugging cap 5, which is convenient for the subsequent installation of a pressure gauge, so that the pressure inside the valve body 8 can be visually checked. The bottom of the valve body 8 is closed by the second plugging cap 15, so that the movement of the movable valve stem 9 The gasket seat 12 is arranged on the inner side of the second plugging cap 15, and the fourth O-ring 14 is arranged in the bottom groove of the gasket seat 12, and the second O-ring 7 is arranged in the top groove of the movable valve stem 9, which can improve the sealing of the valve and effectively prevent the leakage of gas or liquid. At the same time, nitrile rubber is used as the material of the second O-ring 7 and the fourth O-ring 14, which can effectively improve the sealing performance and has good wear resistance and corrosion resistance to ensure the sealing performance under long-term use. The overall material of the pressure reducing valve is mostly stainless steel, which has good corrosion resistance and can resist the erosion of various chemical substances, ensuring the stability and reliability of the valve during use, and the pressure reducing valve has small pressure loss, large flow, low noise, and continuous stable outlet pressure when in use.

[0022] Reference Figure 2 A filter screen 10 is installed on the top of the second blocking cap 15 near the gasket 11. The model of the adjusting nut 3 is M17. The top of the spring 4 is sleeved on the outside of the bottom of the adjusting nut 3. The overall width of the valve body 8 is 75.5 mm, and the inlet and outlet dimensions of the valve body 8 are 2-G3 / 4.

[0023] Specifically, by installing the filter 10, impurities at the inlet can be prevented from entering the valve body 8, thereby protecting the normal operation of the valve. By adjusting the nut 3, the spring 4 can be pushed to move, thereby changing the position of the movable valve stem 9, thereby adjusting the pressure in the valve. The overall width of the valve body 8 can be set to a universal standard with the size of the inlet and outlet, so that the pressure reducing valve has a wide range of applications and can be applied to different working conditions such as fluid media, pipeline sizes and fluid temperatures, and has strong adaptability.

[0024] Reference Figure 2 A first O-ring 6 is disposed on the inner sides of the left and right side interfaces of the valve body 8, and a third O-ring 13 is disposed on the inner side of the bottom interface of the valve body 8. The materials of the first O-ring 6 and the third O-ring 13 are both EPDM.

[0025] Specifically, the sealing performance of the pressure reducing valve is enhanced by providing the first O-ring 6 and the third O-ring 13. After the pressure gauge can be installed through the interfaces on the left and right sides of the valve body 8, the sealing performance of the pressure reducing valve is ensured to be good, and the inlet pressure and outlet pressure can be directly read through the pressure gauge, thereby improving the convenience of use. The use of EPDM rubber as the material improves the durability of the sealing ring, thereby extending the service life.

[0026] Working principle: When using this pressure reducing valve, connect the inlet and outlet of the valve body 8 to the pipeline. After the fluid enters the interior of the valve body 8 through the water inlet, the movable valve stem 9 will be subjected to pressure. When the pressure exceeds the set pressure value, the movable valve stem 9 will move upward, thereby contracting the spring 4, causing the valve to open, and the fluid to be released through the pressure reducing valve, thereby keeping the system pressure within the set range. The filter 10 can prevent impurities at the inlet from entering the interior of the valve body 8 to protect the normal operation of the valve. At the same time, the gasket 11 and the gasket seat 12 can be used to install the movable valve stem 9, and the bottom of the valve body 8 can be closed by the second blocking cap 15, so that the movement of the movable valve stem 9 is restricted. The pressure in the valve can be adjusted by changing the position of the movable valve stem through the adjusting nut 3. A pressure gauge can be installed through the connecting ports on the left and right sides of the top of the valve body 8 to facilitate observation of the pressure inside the pressure reducing valve.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stainless steel pressure reducing valve, comprising a valve body (8), characterized in that: A gasket seat (12) is provided at the inner bottom of the valve body (8), a gasket (11) is provided above the gasket seat (12), a movable valve stem (9) is connected to the internal thread of the gasket seat (12), a spring (4) is sleeved on the top of the movable valve stem (9), an adjusting nut (3) is provided on the inner side of the top of the valve body (8), a valve cap (2) is fixedly connected to the top of the valve body (8), a decorative cover (1) is provided on the top of the valve cap (2), a first blocking cap (5) is installed on both the left and right sides of the valve body (8), and a second blocking cap (15) is installed on the bottom of the valve body (8).

2. The stainless steel pressure reducing valve according to claim 1, characterized in that: The outside of the gasket seat (12) is slidably connected to the inner wall of the valve body (8), a fourth O-ring (14) is arranged in the bottom groove of the gasket seat (12), and the outside of the fourth O-ring (14) is in contact with the inner wall of the second plugging cap (15).

3. The stainless steel pressure reducing valve according to claim 1, characterized in that: A filter screen (10) is installed on the top of the second blocking cap (15) near the gasket (11).

4. The stainless steel pressure reducing valve according to claim 1, characterized in that: A second O-ring (7) is arranged in the outer groove at the top of the movable valve stem (9), the outer portion of the second O-ring (7) fits in with the inner portion of the valve body (8), and the second O-ring (7) and the fourth O-ring (14) are both made of NBR.

5. The stainless steel pressure reducing valve according to claim 1, characterized in that: The model of the adjusting nut (3) is M17, and the top of the spring (4) is sleeved on the outside of the bottom of the adjusting nut (3).

6. The stainless steel pressure reducing valve according to claim 1, characterized in that: A first O-ring (6) is arranged on the inner sides of the left and right side interfaces of the valve body (8), and a third O-ring (13) is arranged on the inner side of the bottom interface of the valve body (8), and the materials of the first O-ring (6) and the third O-ring (13) are both EPDM.

7. The stainless steel pressure reducing valve according to claim 1, characterized in that: The overall width of the valve body (8) is 75.5 mm, and the inlet and outlet dimensions of the valve body (8) are 2-G3 / 4.

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