Non-return anti-shock pressure reducing valve

Abstract

The utility model discloses a non-return shock-resistant pressure reducing valve which comprises a pressure reducing valve body, the pressure reducing valve body is provided with an air inlet and an air outlet, the air outlet is detachably connected with a non-return shock-resistant valve, a valve cavity is formed in the valve body, the valve body is provided with an air inlet port and an air outlet port which are communicated with the valve cavity, and the air inlet port is communicated with the air outlet. The air inlet port is provided with a buffering support used for buffering air resistance, the air outlet port is provided with a flow guide support used for buffering air resistance, and a valve clack capable of opening or closing the air inlet port is arranged in the valve cavity. When high-speed gas is buffered by the buffering support, the flow guide support and the valve clack provided with the reset spring in an abutting mode, vibration of the high-speed gas is greatly weakened, and whistling sound is greatly reduced. The air flow bursts through the valve clack and then flows along the arc-shaped side wall, the buffering and speed reducing effects are further achieved on the air, and then the shock absorption and noise reduction effects are improved. By arranging the valve clack and the elastic piece, the valve clack can be reset when not impacted by airflow, the air inlet port is closed, and the non-return function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure reducing valves, in particular to a non-return and anti-vibration pressure reducing valve. Background Art

[0002] The function of the pressure reducing valve is to adjust the higher input pressure to the specified output pressure (i.e. outlet pressure) and to keep the output pressure stable without being affected by changes in air flow and fluctuations in gas source pressure.

[0003] The pressure reducing valve in the prior art has the following two defects:

[0004] (1) When the upstream pressure of the pressure reducing valve drops and is lower than the outlet pressure, the downstream gas will flow back to the air inlet, affecting the stability of the outlet pressure. However, in many working conditions, the outlet pressure of the pressure reducing valve is often required to be stable and not affected by the fluctuation of the gas source pressure. The pressure reducing valve should have a check function to prevent the downstream gas from flowing back.

[0005] (2) In the gas transmission and distribution system, medium and high pressure gas transmission methods are mostly used, and then medium and high pressure gas is adjusted into low pressure gas through pressure reducing valves and sent to the use place for use. In order to ensure safe use, it is necessary to install pressure reducing valves on the medium and low pressure pipelines in the gas transmission and distribution system to automatically adjust the gas pressure of the medium and low pressure pipelines. However, after the gas is pressure adjusted, the opening at the gas outlet is relatively small, so the air flow rate is relatively high, which will produce vibration and whistling.

[0006] In order to solve the above two defects, it is often necessary to install an anti-vibration and silencer structure and a check structure on the pressure reducing valve respectively, which occupies a large space, is complicated to assemble, and has a high processing cost.

[0007] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0008] The purpose of the utility model is to provide a non-return anti-vibration pressure reducing valve to address the defects and shortcomings of the prior art. The non-return anti-vibration valve realizes the anti-vibration and silencing functions and the non-return function of the pressure reducing valve by setting the non-return anti-vibration valve. The assembly is simple and the processing cost is low.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A check and anti-seismic pressure reducing valve comprises a pressure reducing valve body, the pressure reducing valve body is provided with an air inlet and an air outlet, the air outlet is detachably connected with a check and anti-seismic valve, the check and anti-seismic valve comprises a valve body, a valve cavity is formed in the valve body, the valve body is provided with an air inlet port and an air outlet port which are communicated with the valve cavity, the air inlet port is communicated with the air outlet, the air inlet port is provided with a buffer bracket for buffering air resistance, the air outlet port is provided with a guide bracket for buffering air resistance, a valve flap which can open or close the air inlet port is provided in the valve cavity, an elastic member is provided between the valve flap and the guide bracket, and the elastic member makes the valve flap always have a movement tendency to close the air inlet port.

[0011] Furthermore, it also includes a valve core, the front end of the valve core is penetrated through the center of the buffer bracket, and the rear end of the valve core is penetrated through the circular hole at the center of the valve disc.

[0012] Furthermore, a first through hole for the valve core to pass through is provided at the center of the buffer bracket, and the valve core is provided with a first convex ring that cooperates with a stopper of the first through hole.

[0013] Furthermore, a valve flap support rod is integrally provided at the rear end of the valve flap, and the valve flap support rod is penetrated through the center of the guide bracket.

[0014] Furthermore, a second through hole for the valve flap support rod to pass through is provided at the center of the flow guide bracket, and the valve flap support rod is provided with a second convex ring that cooperates with the second through hole stopper.

[0015] Furthermore, the buffer bracket includes a plurality of buffer ribs uniformly distributed along the circumferential direction, and the buffer ribs are integrally formed with the valve body.

[0016] Furthermore, a wear-resistant ring is tightly arranged at the center of the buffer bracket, and the valve core is movably connected to the wear-resistant ring.

[0017] Furthermore, the flow guide bracket includes a plurality of flow guide ribs uniformly distributed along the circumferential direction, and the plurality of flow guide ribs are arranged to form a trumpet-shaped structure with a small front opening and a large rear opening, and the flow guide bracket is detachably connected to the valve body.

[0018] Furthermore, the air inlet port is provided with an annular groove, and a sealing ring is provided in the annular groove.

[0019] Furthermore, the side wall of the valve body is arc-shaped.

[0020] After adopting the above structure, the utility model has the following beneficial effects:

[0021] (1) The utility model discloses a non-return anti-vibration pressure reducing valve, comprising a pressure reducing valve body, the pressure reducing valve body is provided with an air inlet and an air outlet, the air outlet is detachably connected with a non-return anti-vibration valve, when the high-speed gas passes through the buffer bracket, the flow guide bracket and the valve disc with a return spring, its vibration is greatly weakened, and the whistling sound is greatly reduced. At the same time, the side wall of the valve body is arc-shaped, and the airflow flows along the arc-shaped side wall after breaking the valve disc, which further plays a role in buffering and decelerating the gas, thereby improving the effect of shock reduction and noise reduction.

[0022] (2) The anti-vibration pressure reducing valve described in the utility model can be telescopically installed inside the valve cavity through the cooperation of the valve core and the valve disc support rod. The valve disc is a disc structure with a large obstruction area. When the airflow impacts the surface of the valve disc, it is easy to open, achieving the effect of facilitating the airflow to open for transmission. By setting an elastic member, the valve disc can be reset when it is not impacted by the airflow, closing the air inlet port, and realizing the check function. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present utility model, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 The utility model Figure 1 A schematic diagram of the structure at A;

[0026] Figure 3 It is an explosion schematic diagram of the non-return anti-seismic valve of the utility model;

[0027] Figure 4 It is a three-dimensional schematic diagram of the valve body of the utility model;

[0028] Figure 5 It is a three-dimensional schematic diagram of the valve disc of the utility model;

[0029] Figure 6 It is a three-dimensional schematic diagram of the flow guide bracket of the utility model;

[0030] Figure 7 It is a three-dimensional schematic diagram of the valve core of the utility model.

[0031] Figures 1 to 7 The bid number is:

[0032] 1. Pressure reducing valve body; 11. Air inlet; 12. Air outlet; 2. Check valve; 21. Valve body; 211. Valve cavity; 212. Air inlet port; 2121. Annular groove; 213. Air outlet port; 22. Buffer bracket; 221. First through hole; 222. Buffer rib; 23. Guide bracket; 231. Second through hole; 232. Guide rib; 24. Valve flap; 241. Valve flap support rod; 2411. Second convex ring; 242. Round hole; 25. Elastic member; 26. Valve core; 261. First convex ring; 27. Wear-resistant ring; 28. Sealing ring. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0034] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly defined and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this utility model are only for illustrative purposes and do not represent the only implementation method.

[0039] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] like Figures 1 to 7As shown, a check and anti-seismic pressure reducing valve comprises a pressure reducing valve body 1, wherein the pressure reducing valve body 1 is provided with an air inlet 11 and an air outlet 12, wherein the air outlet 12 is detachably connected with a check and anti-seismic valve 2, wherein the check and anti-seismic valve 2 comprises a valve body 21, wherein a valve cavity 211 is formed in the valve body 21, wherein the valve body 21 is provided with an air inlet port 212 and an air outlet port 213 which are communicated with the valve cavity 211, wherein the air inlet port 212 is communicated with the air outlet 12, wherein the air inlet port 212 is provided with a buffer bracket 22 for buffering air resistance, wherein the air outlet port 213 is provided with a flow guide bracket 23 for buffering air resistance, wherein a valve flap 24 which can open or close the air inlet port 212 is provided in the valve cavity 211, wherein an elastic member 25 is provided between the valve flap 24 and the flow guide bracket 23, wherein the elastic member 25 enables the valve flap 24 to always have a movement tendency to close the air inlet port 212. The buffer bracket 22 includes a plurality of buffer ribs 222 evenly distributed along the circumferential direction, and the buffer ribs 222 are integrally formed with the valve body 21. The flow guide bracket 23 includes a plurality of flow guide ribs 232 evenly distributed along the circumferential direction, and the plurality of flow guide ribs 232 are arranged to form a trumpet-shaped structure with a small front opening and a large rear opening, and the flow guide bracket 23 is detachably connected to the valve body 21. The side wall of the valve body 21 is arc-shaped.

[0041] Based on the above embodiments, the problem to be solved by the utility model is to provide a non-return and anti-seismic pressure reducing valve, including a pressure reducing valve body 1, wherein the pressure reducing valve body 1 is provided with an air inlet 11 and an air outlet 12, wherein the air outlet 12 is detachably connected with a non-return and anti-seismic valve 2, and when the high-speed gas passes through the buffer bracket 22, the flow guide bracket 23 and the valve flap 24 with a reset spring, its vibration is greatly weakened and the whistling sound is greatly reduced. By providing the valve flap 24 and the elastic member 25, the valve flap 24 can be reset when not impacted by the airflow, and the air inlet port 212 is closed, thereby realizing the non-return function. In this embodiment, if Figure 4 As shown, the buffer bracket 22 includes a plurality of buffer ribs 222 uniformly distributed along the circumferential direction, and the buffer ribs 222 are integrally formed with the valve body 21. This structure does not affect the normal flow of gas to a great extent, while reducing the impact force of the gas and extending the service life of the check anti-vibration valve 2. In this embodiment, as Figure 6 As shown, in order to better reduce the gas impact force, the gas outlet 213 of the valve body 21 is provided with a guide bracket 23, and the guide bracket 23 includes a plurality of guide ribs 232 uniformly distributed along the circumference, and the plurality of guide ribs 232 are arranged to form a trumpet-shaped structure with a small front opening and a large rear opening. In a further embodiment, as Figure 4 As shown, the side wall of the valve body 21 is arc-shaped. After the airflow breaks through the valve flap 24, it flows along the arc-shaped side wall, which further buffers and decelerates the gas, thereby improving the effect of shock absorption and noise reduction.

[0042] As another preferred embodiment of the present invention, it further includes a valve core 26, the front end of which is penetrated through the center of the buffer bracket 22, and the rear end of which is penetrated through the circular hole 242 at the center of the valve flap 24. A first through hole 221 is provided at the center of the buffer bracket 22 for the valve core 26 to pass through, and the valve core 26 is provided with a first convex ring 261 that cooperates with the first through hole 221 as a stopper. A valve flap support rod 241 is integrally provided at the rear end of the valve flap 24, and the valve flap support rod 241 is penetrated through the center of the guide bracket 23. A second through hole 231 is provided at the center of the guide bracket 23 for the valve flap support rod 241 to pass through, and the valve flap support rod 241 is provided with a second convex ring 2411 that cooperates with the second through hole 231 as a stopper. In this embodiment, Figures 2 to 7 As shown, through the cooperation of the valve core 26 and the valve flap support rod 241, the valve flap 24 can be telescopically installed inside the valve cavity 211. The valve flap 24 is a disc structure with a large obstruction area. When the airflow hits the surface of the valve flap 24, it is easy to open, achieving the effect of facilitating the airflow to open for transmission. The first convex ring 261 is set to prevent the valve core 26 from escaping from the first through hole 221 of the buffer bracket 22. The second convex ring 2411 is set to prevent the flow guide bracket 23 from hitting the valve flap 24 when the airflow is large, causing damage to the valve flap 24.

[0043] As another preferred embodiment of the present invention, a wear-resistant ring 27 is tightly arranged at the center of the buffer bracket 22, and the valve core 26 is movably connected to the wear-resistant ring 27. Figure 2 , Figure 3 As shown, the provision of the wear-resistant ring 27 is beneficial to extending the service life of the valve body 21. The buffer bracket 22 is integrally formed with the valve body 21. When the buffer bracket 22 is damaged, the entire valve body 21 needs to be replaced, and the center of the buffer bracket 22 slides with the valve core 26, which is easy to wear. When the wear-resistant ring 27 is damaged, the wear-resistant ring 27 can be replaced alone without replacing the entire valve body 21, which is beneficial to saving costs.

[0044] As another preferred embodiment of the present invention, the air inlet port 212 is provided with an annular groove 2121, and a sealing ring 28 is provided in the annular groove 2121. Figure 1 , Figure 2 As shown, the sealing ring 28 is made of flexible rubber material. The characteristics of the flexible material enable the sealing ring 28 to fit better with the air outlet 12 and the air inlet port 212, thereby effectively playing a sealing role.

[0045] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. A non-return anti-vibration pressure reducing valve, comprising a pressure reducing valve body (1), wherein the pressure reducing valve body (1) is provided with an air inlet (11) and an air outlet (12), and characterized in that: The air outlet (12) is detachably connected to a check valve (2), the check valve (2) comprising a valve body (21), a valve cavity (211) formed in the valve body (21), the valve body (21) being provided with an air inlet port (212) and an air outlet port (213) in communication with the valve cavity (211), the air inlet port (212) being in communication with the air outlet (12), the air inlet port (212) being provided with a buffer support (22) for buffering air resistance, the air outlet port (213) being provided with a flow guide support (23) for buffering air resistance, a valve flap (24) for opening or closing the air inlet port (212) being provided in the valve cavity (211), an elastic member (25) being provided between the valve flap (24) and the flow guide support (23), the elastic member (25) enabling the valve flap (24) to always have a movement tendency to close the air inlet port (212).

2. A non-return anti-vibration pressure reducing valve according to claim 1, characterized in that: It also includes a valve core (26), the front end of the valve core (26) being arranged through the center of the buffer bracket (22), and the rear end of the valve core (26) being arranged through the circular hole (242) at the center of the valve flap (24).

3. A non-return anti-vibration pressure reducing valve according to claim 2, characterized in that: The center of the buffer bracket (22) is provided with a first through hole (221) for the valve core (26) to pass through, and the valve core (26) is provided with a first convex ring (261) that cooperates with the first through hole (221) as a stopper.

4. The anti-vibration check pressure reducing valve according to claim 1, characterized in that: A valve flap support rod (241) is integrally provided at the rear end of the valve flap (24), and the valve flap support rod (241) is passed through the center of the flow guide bracket (23).

5. The anti-vibration non-return pressure reducing valve according to claim 4, characterized in that: A second through hole (231) for the valve flap support rod (241) to pass through is provided at the center of the flow guide bracket (23), and the valve flap support rod (241) is provided with a second convex ring (2411) that cooperates with the second through hole (231) as a stopper.

6. The anti-vibration check pressure reducing valve according to claim 1, characterized in that: The buffer bracket (22) comprises a plurality of buffer ribs (222) uniformly distributed along the circumferential direction, and the buffer ribs (222) are integrally formed with the valve body (21).

7. The anti-vibration check pressure reducing valve according to claim 2, characterized in that: A wear-resistant ring (27) is tightly fitted at the center of the buffer bracket (22), and the valve core (26) is movably connected to the wear-resistant ring (27).

8. The anti-vibration check pressure reducing valve according to claim 1, characterized in that: The flow guide bracket (23) comprises a plurality of flow guide ribs (232) uniformly distributed along the circumferential direction, and the plurality of flow guide ribs (232) are arranged to form a trumpet-shaped structure with a small front opening and a large rear opening, and the flow guide bracket (23) is detachably connected to the valve body (21).

9. The anti-vibration check pressure reducing valve according to claim 1, characterized in that: The air inlet port (212) is provided with an annular groove (2121), and a sealing ring (28) is provided in the annular groove (2121).

10. The anti-vibration check pressure reducing valve according to claim 1, characterized in that: The side wall of the valve body (21) is arc-shaped.

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