Pressure regulating valve

Abstract

The utility model discloses a pressure regulating valve which comprises a valve body. A guide rod is arranged in the valve body, the lower end of the guide rod is connected with an upper pressing plate, a membrane is arranged at the lower end of the upper pressing plate, and the diameter of the membrane is 20-25 mm; a circulation channel is arranged in the valve body, and the diameter of the circulation channel ranges from 1.5 mm to 2 mm. According to the pressure regulating valve, the valve seat with the small size, namely the circulation channel, is more suitable for a small-flow pipeline, meanwhile, the diaphragm with the large size is arranged, so that large sealing specific pressure is generated, the pressure regulating valve has high sensitivity, and when the pressure or flow of the pipeline in front of the valve fluctuates, the pressure behind the valve is always kept stable.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, in particular to a pressure regulating valve. Background Art

[0002] When transporting materials like tap water and natural gas, pressure-regulating valves are required on pipelines. This is because the pressure is typically high during pipeline transportation, and a pressure-regulating valve is required to reduce and maintain the pressure at a lower level at the user's end. Various types of pressure-reducing / pressure-regulating valves exist in the related art, but most have a relatively wide range of flow rate adjustments, resulting in poor pressure regulation accuracy. Furthermore, there are currently few pressure-regulating valves available on the market for low-flow pipelines. Utility Model Content

[0003] The purpose of the present invention is to solve the above problems and provide a pressure regulating valve.

[0004] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0005] A pressure regulating valve comprises a valve body;

[0006] A guide rod is provided inside the valve body, the lower end of the guide rod is connected to an upper pressure plate, the lower end of the upper pressure plate is provided with a diaphragm, and the diameter of the diaphragm is 20-25 mm;

[0007] A circulation channel is provided inside the valve body, and the diameter of the circulation channel is 1.5-2 mm.

[0008] As a further description of the above technical solution, the diameter of the diaphragm is 25 mm.

[0009] As a further description of the above technical solution, the diameter of the circulation channel is 2 mm.

[0010] As a further description of the above technical solution, the sealing pressure ratio in the valve body is (25*25) / (2*2).

[0011] As a further description of the above technical solution, a lower pressure plate is provided below the diaphragm, a valve plate assembly is provided below the lower pressure plate, a valve core is provided at the center of the valve plate assembly, and the valve core is located in the circulation channel.

[0012] As a further description of the above technical solution, an upper spring is provided on the outside of the guide rod.

[0013] As a further description of the above technical solution, a guide sleeve is provided below the valve core, and a lower spring is provided inside the guide sleeve.

[0014] As a further description of the above technical solution, a valve cover is provided at the upper end of the valve body, and the valve cover is connected to the valve body via a locking screw.

[0015] As a further description of the above technical solution, the diaphragm is any one of fluororubber, polytetrafluoroethylene and EPDM rubber.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. The utility model is more suitable for small flow pipelines by setting a smaller valve seat, i.e., a flow channel. At the same time, a larger diaphragm is set to generate a larger sealing pressure ratio, so that the pressure regulating valve has high sensitivity. When the pressure or flow of the pipeline before the valve fluctuates, the pressure after the valve always remains stable.

[0018] In order to more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the pressure regulating valve provided by the utility model.

[0020] Figure numerals: 1. valve body; 2. lower spring; 3. guide sleeve; 4. valve core; 5. valve disc assembly; 6. valve disc pressure ring; 7. lower pressure plate; 8. diaphragm; 9. upper pressure plate; 10. guide rod; 11. upper spring; 12. valve cover pressure ring; 13. valve cover; 14. adjusting nut; 15. locking screw; 16. circulation channel. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0022] like Figure 1 As shown, in one embodiment, a pressure regulating valve includes a valve body 1, a guide rod 10 disposed within the valve body 1, an upper pressure plate 9 connected to the lower end of the guide rod 10, and a diaphragm 8 disposed at the lower end of the upper pressure plate 9. The diameter of the diaphragm 8 is 20-25 mm, preferably 25 mm. A flow channel 16 is disposed within the valve body 1 for circulating a liquid medium. The flow channel 16 has a diameter of 1.5-2 mm, preferably 2 mm.

[0023] Specifically, by setting a smaller valve seat, i.e., the flow channel 16, it is more suitable for small flow pipelines, and at the same time, a larger diaphragm 8 is set, thereby generating a larger sealing pressure ratio, wherein the sealing pressure ratio refers to the pressure acting on the sealing surface to prevent the leakage of the medium. It is a key parameter to ensure the sealing performance of the regulating valve. Simply put, when the valve is closed, the sealing pressure ratio is the pressure corresponding to the force that causes the valve disc (or valve core) to fit tightly with the valve seat to prevent the fluid from leaking from between the sealing surfaces. This makes the pressure regulating valve highly sensitive, and when the pressure or flow of the pipeline before the valve fluctuates, the pressure after the valve always remains stable.

[0024] Optionally, the material of the diaphragm 8 is any one of fluororubber, polytetrafluoroethylene and EPDM rubber, which has good corrosion resistance and aging resistance. The specific material can be selected according to actual needs and actual conditions.

[0025] Optionally, a lower pressure plate 7 is provided below the diaphragm 8, a valve plate assembly is provided below the lower pressure plate 7, a valve core 4 is provided at the center of the valve plate assembly, and the valve core 4 is located in the circulation channel 16. An upper spring 11 is provided on the outside of the guide rod 10, and the upper spring 11 can help the guide rod 10 to reset. A guide sleeve 3 is provided below the valve core 4, and a lower spring 2 is provided inside the guide sleeve 3, and the lower spring 2 helps to reset the valve core 4. A valve cover 13 is provided at the upper end of the valve body 1, and the valve cover 13 is connected to the valve body 1 by a locking screw 15. Among them, a valve disc pressure ring 6 is provided above the valve disc assembly 5, and a valve cover 13 pressure ring 12 is provided on the outside of the valve cover 13.

[0026] The standard parts used in this utility model can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0027] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pressure regulating valve, characterized in that: Including valve body; A guide rod is provided inside the valve body, the lower end of the guide rod is connected to an upper pressure plate, the lower end of the upper pressure plate is provided with a diaphragm, and the diameter of the diaphragm is 20-25 mm; A circulation channel is provided inside the valve body, and the diameter of the circulation channel is 1.5-2 mm.

2. The pressure regulating valve according to claim 1, characterized in that: The diameter of the diaphragm is 25 mm.

3. The pressure regulating valve according to claim 1, characterized in that The diameter of the flow channel is 2 mm.

4. The pressure regulating valve according to claim 1, characterized in that The sealing specific pressure in the valve body is (25*25) / (2*2).

5. The pressure regulating valve according to claim 1, characterized in that: A lower pressure plate is provided below the diaphragm, a valve plate assembly is provided below the lower pressure plate, a valve core is provided at the center of the valve plate assembly, and the valve core is located in the circulation channel.

6. The pressure regulating valve according to claim 1, characterized in that An upper spring is arranged on the outside of the guide rod.

7. The pressure regulating valve according to claim 5, characterized in that: A guide sleeve is provided below the valve core, and a lower spring is provided inside the guide sleeve.

8. The pressure regulating valve according to claim 1, characterized in that: A valve cover is provided at the upper end of the valve body, and the valve cover is connected to the valve body via a locking screw.

9. The pressure regulating valve according to claim 1, characterized in that: The diaphragm is any one of fluororubber, polytetrafluoroethylene and EPDM rubber.

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