Gas pressure reducing valve structure

Abstract

This utility model relates to the structure of a gas pressure reducing valve, including a valve body, a valve cover, and a push rod. A diaphragm is provided between the valve cover and the valve body. The diaphragm has a concave center and an upward protrusion around the periphery of the center. A retaining strip is provided at the edge of the diaphragm. The valve body has a diaphragm groove, and upper and lower pressure rings are provided on the upper and lower parts of the diaphragm, respectively. An adjusting rod is provided inside the valve cover, and a main spring and an adjusting nut are sleeved on the outside of the adjusting rod. A bottom cover is provided at the bottom of the valve body, and a valve seat is provided on the bottom cover. A push rod is provided on the valve seat. A secondary sealing seat is embedded in the center of the lower pressure ring. One end of the push rod abuts against the secondary sealing seat, and a valve seat spring is provided between the other end and the bottom cover. A filter element is provided outside the valve seat. One end of the filter element is connected to the valve body, and the other end is locked inside the bottom cover. A pressure gauge is connected to the outside of the valve body. The diameter ratio of the adjusting rod to the push rod is 2.5-3.8:1. With the cooperation of the upper and lower pressure rings, the diaphragm has a stable structure, extends its service life, provides stability for the operation of the pressure reducing valve, and the double spring ensures the pressure reducing effect of the pressure reducing valve.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure reducing valves, specifically a gas pressure reducing valve structure, and more particularly to a diaphragm-type gas pressure reducing valve structure. Background Technology

[0002] In the prior art, a pressure reducing valve is a device used to control fluid pressure, mainly used to reduce the pressure of a high-pressure water source to the required safe level in order to protect downstream equipment and pipeline systems.

[0003] Current pressure reducing valves generally cannot filter solid particles, impurities, and contaminants from gases. Prolonged use can damage and clog downstream equipment, compromising the normal operation of the pipeline system. Furthermore, existing spring structures have inherent flaws. When the springs are subjected to alternating stress for extended periods, their stiffness and other properties decrease sharply, affecting the stability of the pressure reducing action and compromising the valve's quality and lifespan. Summary of the Invention

[0004] The purpose of this invention is to provide an improved gas pressure reducing valve. Through structural improvements, the combined action of the diaphragm, main spring, and valve seat spring ensures the stability and accuracy of the pressure reducing action and extends the service life of the pressure reducing valve.

[0005] To achieve the above objectives, the technical solution of this utility model is: a gas pressure reducing valve structure, comprising a valve body, a valve cover connected to the valve body, and a top rod disposed within the valve body, characterized in that: a diaphragm is provided between the valve cover and the valve body, the diaphragm has a central depression, and an upward protrusion is provided around the periphery of the central depression; a retaining strip is provided at the edge of the diaphragm; a diaphragm groove is provided on the valve body to cooperate with the retaining strip; upper and lower pressure rings are respectively provided on the upper and lower parts of the diaphragm for fixing the diaphragm; an adjusting rod is provided inside the valve cover, and an adjusting rod is provided outside the valve cover. The valve body is fitted with a main spring and an adjusting nut to limit the position of the main spring; a bottom cover is provided at the bottom of the valve body, and a valve seat is provided on the bottom cover. A push rod is installed through the valve seat. A secondary sealing seat is embedded in the middle of the lower pressure ring. One end of the push rod abuts against the secondary sealing seat, and a valve seat spring is provided between the other end of the push rod and the bottom cover. A filter element is fitted on the outside of the valve seat. One end of the filter element is connected to the valve body, and the other end of the filter element is locked inside the bottom cover; a pressure gauge is connected to the outside of the valve body; the diameter ratio of the adjusting rod to the push rod is 2.5-3.8:1.

[0006] Preferably, an adjusting ring is fitted on the top of the valve cover, and a pan head screw is provided on the top of the adjusting ring to connect the adjusting ring to the valve cover.

[0007] Preferably, the adjusting rod includes an adjusting rod body and an adjusting rod protrusion located on the top of the adjusting rod body, the protrusion abutting against the top of the valve cover; the adjusting rod is provided with an external thread, and the adjusting nut is provided with an internal thread that mates with the external thread, so that the adjusting nut can move along the adjusting rod.

[0008] Furthermore, the main spring is positioned between the upper pressure ring and the adjusting nut, and the top of the upper pressure ring has a pressure ring groove for placing the main spring.

[0009] Furthermore, the diameter ratio of the valve seat spring to the main spring is 1:2.3-4; a D-type sealing ring is provided between the base and the valve body.

[0010] Compared with the prior art, the technical solution of this utility model not only improves the overall technical solution, but also includes many detailed improvements. Specifically, it has the following beneficial effects:

[0011] The improved solution of this utility model has a diaphragm between the valve cover and the valve body. The diaphragm is recessed in the middle and has an upward protrusion along the middle of the recess. A retaining strip is provided at the edge of the diaphragm. The valve body has a diaphragm groove that cooperates with the retaining strip. Upper and lower pressure rings are provided on the diaphragm to fix it. With the cooperation of the upper and lower pressure rings, the diaphragm has a stable structure, is not easy to break, extends its service life, and provides stability for the operation of the pressure reducing valve.

[0012] In the technical solution of this utility model, the bottom of the valve body is provided with a bottom cover, the bottom cover is provided with a valve seat, a top rod is provided through the valve seat, a sealing seat is embedded in the middle of the lower pressure ring, one end of the top rod abuts against the sealing seat, and a valve seat spring is provided between the other end of the top rod and the bottom cover. By setting double springs, the pressure reducing effect of the pressure reducing valve is guaranteed to be accurate, reliable, stable and long-lasting.

[0013] In the structure of this utility model, a filter element is sleeved on the outside of the valve seat. One end of the filter element is connected to the valve body, and the other end of the filter element is stuck in the bottom cover. By setting the filter element, solid particles, impurities and pollutants in the gas can be filtered, so that downstream equipment is protected from damage and blockage, and the normal operation of the pipeline system is guaranteed.

[0014] This utility model has a simple structure, reasonable layout, is easy to use, and is easy to promote and utilize. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a cross-sectional view of the present invention.

[0017] Figure 3 This is a structural schematic diagram of an embodiment of the present utility model.

[0018] Figure label:

[0019] 1. Bottom cover, 2. D-ring, 3. Valve body, 4. Secondary sealing seat, 5. Lower pressure ring, 6. Diaphragm, 7. Upper pressure ring, 8. Valve cover, 9. Main spring, 10. Adjusting ring;

[0020] 11 Gasket, 12 Pan head screw, 13 Adjusting rod, 14 Adjusting nut, 15 Top rod, 16 Valve seat, 17 O-ring, 18 Valve seat spring, 19 Filter element, 20 Pressure gauge. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] This utility model provides a gas pressure reducing valve structure, including a valve body 3, a valve cover 8 connected to the valve body, and a push rod disposed within the valve body. See details below. Figure 1 The difference between this and existing technologies lies in the following: a diaphragm 6 is provided between the valve cover 8 and the valve body. The diaphragm has a concave center, with an upward-facing protrusion around the periphery of the concave center. A square retaining strip is provided at the edge of the diaphragm, and a diaphragm groove that mates with the retaining strip is provided on the valve body, thus fixing the edge of the diaphragm between the valve body and the valve cover. Simultaneously, upper and lower pressure rings are provided above and below the diaphragm to fix it, and these rings cooperate with each other. An adjusting rod 13 is provided inside the valve cover, and a main spring and an adjusting nut 14 for limiting the position of the main spring are fitted around the adjusting rod. The adjusting nut can move up and down along the adjusting rod. Here, with the cooperation of the upper and lower pressure rings, the diaphragm has a stable structure, is not easily damaged, extends its service life, and provides stability for the operation of the pressure reducing valve.

[0023] Furthermore, the bottom of the valve body is provided with a bottom cover 1, and a valve seat 16 is provided on the bottom cover. A push rod 15 is provided through the valve seat. A secondary sealing seat 4 is embedded in the middle of the lower pressure ring. One end of the push rod abuts against the secondary sealing seat 4. A valve seat spring 18 is provided between the other end of the push rod and the bottom cover. A filter element 19 is sleeved on the outside of the valve seat. One end of the filter element is connected to the valve body, and the other end of the filter element is locked in the bottom cover 1 to ensure the filtration effect of the filter element. A pressure gauge 20 is connected to the outside of the valve body. The diameter ratio of the adjusting rod to the push rod is 2.5-3.8:1.

[0024] Example

[0025] In this embodiment, the gas pressure reducing valve structure includes a valve body 3, a valve cover 1 connected to the valve body, and a push rod 15 disposed within the valve body. A diaphragm 6 is provided between the valve cover and the valve body. The diaphragm has a central depression, and an upward protrusion is provided around the periphery of the central depression. A retaining strip is provided at the edge of the diaphragm. A diaphragm groove that cooperates with the retaining strip is provided on the valve body. An upper pressure ring 7 and a lower pressure ring 5 are respectively provided on the upper and lower parts of the diaphragm to fix the diaphragm, thereby securing the diaphragm and extending its service life. Furthermore, a gap of 0.3-0.6 mm is provided between the diaphragm protrusion and the upper pressure ring 7. This gap reduces the friction between the diaphragm and the upper pressure ring, further extending the service life.

[0026] An adjusting rod 13 is installed inside the valve cover. A main spring and an adjusting nut 14 for limiting the position of the main spring are sleeved on the outside of the adjusting rod. The adjusting nut can move up and down along the adjusting rod. A bottom cover is provided at the bottom of the valve body. A valve seat 16 is provided on the bottom cover. A push rod 15 is installed through the valve seat. A secondary sealing seat 4 is embedded in the middle of the lower pressure ring. One end of the push rod abuts against the secondary sealing seat. A valve seat spring 18 is provided between the other end of the push rod and the bottom cover. A filter element 19 is sleeved on the outside of the valve seat. One end of the filter element is connected to the valve body. The other end of the filter element is locked in the bottom cover to ensure effective filtration of gas, so as to prevent damage and blockage of downstream equipment and ensure the normal operation of the pipeline system. A pressure gauge 20 is connected to the outside of the valve body for easy observation and to ensure safe use. The diameter ratio of the adjusting rod to the push rod is 2.5-3.8:1, which improves the performance.

[0027] Specifically, an adjusting ring 10 is fitted on the top of the valve cover, and a pan head screw 12 is provided on the top of the adjusting ring. The top of the valve cover has an upward-facing valve cover protrusion, and the valve cover protrusion has a connecting through hole that mates with the pan head screw. The adjusting ring is connected to the valve cover by the pan head screw, and an adjusting rod is provided in the connecting through hole. At the same time, the pan head screw is connected to the adjusting rod and effectively fixes the adjusting rod.

[0028] Furthermore, the adjusting rod includes an adjusting rod body and an adjusting rod protrusion on the top of the adjusting rod body. The protrusion abuts against the top of the valve cover, ensuring that the adjusting rod is positioned inside the valve cover. A contraction portion is provided between the adjusting rod protrusion and the adjusting rod body to limit the position of the adjusting nut. The adjusting rod has an external thread, and the adjusting nut 14 has an internal thread that mates with the external thread, allowing the adjusting nut to move along the adjusting rod. By changing the position of the adjusting nut, the main spring 9 is effectively limited, controlling the spring force. Since the main spring is positioned between the upper pressure ring 7 and the adjusting nut, the top of the upper pressure ring 7 has a pressure ring groove for holding the main spring. By controlling the spring force of the main spring, a certain amount of pressure can be applied to the upper pressure ring, thereby ensuring the pressure on the diaphragm 6, keeping the diaphragm relatively fixed, ensuring its use, extending its lifespan, and providing stability for the pressure reducing valve operation.

[0029] The valve body has a bottom cover, on which is a valve seat. A push rod runs through the valve seat. A sealing seat is embedded in the middle of the lower pressure ring. One end of the push rod abuts against the sealing seat, and the other end of the push rod is connected to the bottom cover by a valve seat spring 18. The diameter ratio of the valve seat spring to the main spring is 1:2.3-4, with a preferred ratio of 1:2.5. A D-type sealing ring 2 is provided between the base and the valve body. By setting up double springs, the pressure reducing effect of the pressure reducing valve is ensured to be precise, reliable, stable and long-lasting.

[0030] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications or substitutions should be considered within the protection scope of the present invention.

Claims

1. A gas pressure reducing valve structure, comprising a valve body, a valve cover connected to the valve body, and a push rod disposed within the valve body, characterized in that: A diaphragm is provided between the valve cover and the valve body. The diaphragm is recessed in the middle and has an upward protrusion on the outer periphery of the middle. A retaining strip is provided at the edge of the diaphragm. The valve body has a diaphragm groove that cooperates with the retaining strip. Upper and lower pressure rings are provided on the diaphragm to fix it. An adjusting rod is provided inside the valve cover, and a main spring and an adjusting nut for limiting the position of the main spring are sleeved on the outside of the adjusting rod; The bottom of the valve body is provided with a bottom cover, and a valve seat is provided on the bottom cover. A push rod is installed through the valve seat. A sealing seat is embedded in the middle of the lower pressure ring. One end of the push rod abuts against the sealing seat. A valve seat spring is provided between the other end of the push rod and the bottom cover. A filter element is sleeved on the outside of the valve seat. One end of the filter element is connected to the valve body, and the other end of the filter element is stuck in the bottom cover. A pressure gauge is connected to the outside of the valve body; the diameter ratio of the adjusting rod to the push rod is 2.5-3.8:

1.

2. The gas pressure reducing valve structure according to claim 1, characterized in that: An adjusting ring is fitted on the top of the valve cover, and a pan head screw passes through the top of the adjusting ring, connecting the adjusting ring to the valve cover via the pan head screw.

3. The gas pressure reducing valve structure according to claim 1, characterized in that: The adjusting rod includes an adjusting rod body and an adjusting rod protrusion on the top of the adjusting rod body, the protrusion abutting against the top of the valve cover; the adjusting rod is provided with an external thread, and the adjusting nut is provided with an internal thread that mates with the external thread, so that the adjusting nut can move along the adjusting rod.

4. The gas pressure reducing valve structure according to claim 1, characterized in that: The main spring is positioned between the upper pressure ring and the adjusting nut, and the top of the upper pressure ring has a pressure ring groove for placing the main spring.

5. The gas pressure reducing valve structure according to claim 1, characterized in that: The diameter ratio of the valve seat spring to the main spring is 1:2.3-4; a D-type sealing ring is provided between the base and the valve body.

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