Adjustable gas pressure reducing valve

Abstract

An adjustable fuel gas pressure reducing valve comprises a valve body provided with a valve cavity, the valve body is provided with an air inlet hole and an air outlet hole which are both communicated with the valve cavity, a membrane separating the upper portion and the lower portion of the valve cavity is arranged in the valve cavity, the adjustable fuel gas pressure reducing valve further comprises a valve rod, a lever and a spring, and a screw hole vertically penetrating to the valve cavity is formed in the upper side of the valve body. The valve rod is vertically arranged and connected to the screw hole in a screwed mode, a bearing portion located on the upper portion of the valve cavity is arranged at the lower end of the valve rod, the air inlet hole comprises an orifice penetrating through the bottom wall of the valve cavity, the upper end of the spring abuts against the bearing portion, the lower end of the spring abuts against the membrane, and the membrane is provided with an adapting portion for being connected with the lever. The lever is provided with a plug extending to the position above the opening of the air inlet. According to the scheme, adaptation to fuel gas with different pressure requirements is achieved, universality is effectively improved, and operation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of gas pressure reducing valves, and particularly relates to an adjustable gas pressure reducing valve. Background Art

[0002] A gas pressure reducing valve is used to reduce the pressure of the gas in the pipeline during the gas transmission process for the convenience of users. The existing gas pressure reducing valve generally includes a valve body with a valve cavity inside. A flexible diaphragm is installed in the valve cavity, which divides the valve cavity into an upper part and a lower part. A spring acting on the flexible diaphragm is provided in the upper part of the valve cavity, and an air inlet hole and an air outlet hole are provided in the lower part of the valve cavity. A screw connected to the flexible diaphragm is provided in the lower part of the valve cavity, and the screw is connected to a lever with a plug facing the air inlet hole. Thus, the flexible diaphragm drives the lever to move through the screw, realizing the on-off control of the air inlet hole by the plug.

[0003] During use, the gas with a relatively high pressure enters the lower part of the valve cavity from the air inlet hole, pushes the flexible diaphragm to move upward and compress the spring. After the spring is compressed, it will apply a downward elastic force to the flexible diaphragm, so that the opening degree of the plug of the lever to the air inlet hole is controlled within a reasonable range, thereby achieving the function of stabilizing and reducing the pressure. However, since the suitable pressures corresponding to different types of gas are different, for example, the pressure of liquefied gas is greater than that of natural gas. When the gas type changes, in order to ensure that the burner can reach the best combustion state, it is necessary to replace gas pressure reducing valves of different models for adaptation, which is obviously very troublesome and increases the risk of air leakage. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the existing gas pressure reducing valve has poor versatility and can only be adapted to a single type of gas.

[0005] To solve the above problems, the utility model provides an adjustable gas pressure reducing valve, which includes a valve body provided with a valve cavity. The valve body is provided with an air inlet hole and an air outlet hole both communicating with the valve cavity. A diaphragm that divides the upper part and the lower part of the valve cavity is provided in the valve cavity. The adjustable gas pressure reducing valve also includes a valve rod, a lever and a spring. A screw hole vertically penetrating through to the valve cavity is provided on the upper side of the valve body. The valve rod is arranged vertically and screwed into the screw hole, and a receiving part located in the upper part of the valve cavity is provided at the lower end of the valve rod. The air inlet hole includes an orifice penetrating through to the bottom wall of the valve cavity. The upper end of the spring abuts against the receiving part and the lower end abuts against the diaphragm. The diaphragm is provided with a transfer part for connecting the lever, and the lever is provided with a plug extending above the orifice of the air inlet hole.

[0006] Compared with the prior art, the above scheme adds a valve stem and sets a screw hole for screwing the valve stem on the upper side of the valve body, and the upper end of the spring abuts against the receiving part of the valve stem and the lower end abuts against the diaphragm, so that the height of the receiving part at the lower end of the valve stem can be adjusted by rotating the valve stem, and then the preset compression amount of the spring is adjusted, and finally adaptation to gases with different pressure requirements is achieved, which effectively improves versatility and is simple and convenient to operate.

[0007] In an improved solution, the receiving portion includes an upper cover plate in the transverse direction, and the upper portion of the valve cavity is provided with a guide inner circumferential wall in the vertical direction. The outer peripheral side of the upper cover plate slides and abuts against the guide inner circumferential wall, and the upper end of the spring abuts against the upper cover plate, so that when the valve stem is rotated, the upper cover plate can move vertically more stably under the guidance of the guide inner circumferential wall to achieve height adjustment, and the reliability is better.

[0008] In an improved solution, a circular recessed groove is provided on the lower side of the upper cover plate, and the upper end of the spring is inserted into the recessed groove, thereby further improving the connection reliability between the upper end of the spring and the upper cover plate.

[0009] In an improved solution, a lower cover plate is attached to the upper side of the diaphragm, and the lower end of the spring abuts against the lower cover plate, thereby ensuring that the elastic pushing effect of the lower end of the spring on the diaphragm is more uniform and stable.

[0010] In an improved solution, the adapter portion includes a vertical screw connected to the lower side of the middle portion of the diaphragm, one end of the lever is connected to the screw and the other end is a plug extending above the opening of the air inlet hole, so that when the middle portion of the diaphragm moves up and down due to deformation, the screw will drive the lever to move up and down, thereby realizing the opening and closing control of the air inlet hole by the plug.

[0011] In an improved solution, the upper end of the valve stem extends above the screw hole, and a knob is connected to the upper end of the valve stem, so that the user can rotate the valve stem more conveniently through the knob.

[0012] In an improved solution, the plug is made of rubber material to ensure the sealing of the air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional schematic diagram of an adjustable gas pressure reducing valve.

[0014] Description of reference numerals:

[0015] 1. Valve body; 11. Valve cavity; 111. Guiding inner peripheral wall; 12. Air inlet hole; 13. Air outlet hole; 14. Screw hole; 2. Diaphragm; 21. Lower cover plate; 3. Valve rod; 31. Upper cover plate; 311. Concave groove; 32. Knob; 4. Lever; 41. Plug; 42. Screw; 5. Spring. Detailed implementation manners

[0016] Those skilled in the art should understand that the following implementation manners are only used to explain the technical principle of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0017] In the description of the following embodiments, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0018] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0019] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Please refer to Figure 1 , an adjustable gas pressure reducing valve provided by an embodiment of the present utility model includes a valve body 1 provided with a valve cavity 11. The valve body 1 is provided with an air inlet hole 12 and an air outlet hole 13 that are both communicated with the valve cavity 11. A diaphragm 2 that separates the upper and lower parts of the valve cavity 11 is provided in the valve cavity 11. It also includes a valve rod 3, a lever 4 and a spring 5. A screw hole 14 that vertically penetrates to the valve cavity 11 is provided on the upper side of the valve body 1. The valve rod 3 is arranged vertically and screwed to the screw hole 14. And a receiving portion located in the upper part of the valve cavity 11 is provided at the lower end of the valve rod 3. The air inlet hole 12 includes an orifice that penetrates to the bottom wall of the valve cavity 11. The upper end of the spring 5 abuts against the receiving portion and the lower end abuts against the diaphragm 2. The diaphragm 2 is provided with a transfer portion for connecting the lever 4. The lever 4 is provided with a plug 41 that extends above the orifice of the air inlet hole 12.

[0021] The above scheme adds a valve stem 3 and sets a screw hole 14 for screwing the valve stem 3 on the upper side of the valve body 1, and the upper end of the spring 5 abuts against the receiving part of the valve stem 3 and the lower end abuts against the diaphragm 2, so that the height of the receiving part at the lower end of the valve stem 3 can be adjusted by rotating the valve stem 3, and then the preset compression amount of the spring 5 is adjusted, and finally the adaptation to the gas with different pressure requirements is realized, which effectively improves the versatility and is simple and convenient to operate.

[0022] In this embodiment, the receiving portion includes an upper cover plate 31 in the horizontal direction, and the upper portion of the valve cavity 11 is provided with a guide inner peripheral wall 111 in the vertical direction. The outer peripheral side of the upper cover plate 31 slides against the guide inner peripheral wall 111, and the upper end of the spring 5 abuts against the upper cover plate 31, so that when the valve stem 3 is rotated, the upper cover plate 31 can be guided by the guide inner peripheral wall 111 to move vertically more stably to achieve height adjustment, and the reliability is better. It should be understood that the receiving portion and the lower end of the valve stem 3 can be connected in an integral manner or after being assembled in a split manner, and this design does not limit this.

[0023] Furthermore, a circular recessed groove 311 is provided on the lower side of the upper cover plate 31 , and the upper end of the spring 5 is inserted into the recessed groove 311 , thereby further improving the connection reliability between the upper end of the spring 5 and the upper cover plate 31 .

[0024] In this embodiment, a lower cover plate 21 is attached to the upper side of the diaphragm 2 , and the lower end of the spring 5 abuts against the lower cover plate 21 , thereby ensuring that the elastic pushing effect of the lower end of the spring 5 on the diaphragm 2 is more uniform and stable.

[0025] In this embodiment, the adapter portion includes a vertical screw 42, which is connected to the lower side of the middle part of the diaphragm 2. One end of the lever 4 is connected to the screw 42 and the other end is a plug 41 extending above the opening of the air inlet hole 12. When the middle part of the diaphragm 2 moves up and down due to deformation, the screw 42 will drive the lever 4 to move up and down, thereby realizing the opening and closing control of the opening of the air inlet hole 12 by the plug 41.

[0026] In this embodiment, the upper end of the valve stem 3 extends above the screw hole 14 , and a knob 32 is connected to the upper end of the valve stem 3 , so that the user can rotate the valve stem 3 more conveniently through the knob 32 .

[0027] The plug 41 is preferably made of rubber material to ensure the sealing of the air inlet 12 .

[0028] It should be noted that in the description of the present application, terms indicating directions or positional relationships such as "inner" and "outer" are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application; all directional indications (such as up, down, left, right, front, back, inner, outer) are only used to explain the relative positional relationships and movement conditions between components in a certain specific posture. If this specific posture changes, then the directional indications will also change accordingly.

[0029] In the description of the present application, descriptions referring to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific example", or "some examples" mean that the specific features, mechanisms, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0030] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An adjustable gas pressure reducing valve, comprising a valve body (1) provided with a valve cavity (11), the valve body (1) being provided with an air inlet (12) and an air outlet (13) both connected to the valve cavity (11), a diaphragm (2) being provided in the valve cavity (11) for separating the upper and lower parts of the valve cavity (11), characterized in that: It also includes a valve stem (3), a lever (4) and a spring (5); the upper side of the valve body (1) is provided with a screw hole (14) which vertically penetrates to the valve cavity (11); the valve stem (3) is arranged vertically and screwed to the screw hole (14); and the lower end of the valve stem (3) is provided with a receiving portion located at the upper part of the valve cavity (11); the air inlet hole (12) includes an orifice which penetrates to the bottom wall of the valve cavity (11); the upper end of the spring (5) abuts against the receiving portion and the lower end abuts against the diaphragm (2); the diaphragm (2) is provided with a transition portion for connecting the lever (4); and the lever (4) is provided with a plug (41) which extends to the top of the orifice of the air inlet hole (12).

2. The adjustable gas pressure reducing valve according to claim 1, characterized in that: The receiving portion comprises an upper cover plate (31) in a transverse direction, and the upper portion of the valve cavity (11) is provided with a guide inner peripheral wall (111) in a vertical direction. The outer peripheral side of the upper cover plate (31) slides against the guide inner peripheral wall (111), and the upper end of the spring (5) abuts against the upper cover plate (31).

3. The adjustable gas pressure reducing valve according to claim 2, characterized in that: A circular recessed groove (311) is provided on the lower side of the upper cover plate (31), and the upper end of the spring (5) is inserted into the recessed groove (311).

4. The adjustable gas pressure reducing valve according to any one of claims 1 to 3, characterized in that: A lower cover plate (21) is attached to the upper side of the diaphragm (2), and the lower end of the spring (5) abuts against the lower cover plate (21).

5. The adjustable gas pressure reducing valve according to claim 1, characterized in that: The adapter portion includes a vertical screw (42), the screw (42) is connected to the lower side of the middle part of the diaphragm (2), one end of the lever (4) is connected to the screw (42) and the other end is a plug (41) extending to the top of the orifice of the air inlet hole (12).

6. The adjustable gas pressure reducing valve according to claim 1, characterized in that: The upper end of the valve stem (3) extends above the screw hole (14), and the upper end of the valve stem (3) is connected to a knob (32).

7. The adjustable gas pressure reducing valve according to claim 1, characterized in that: The plug (41) is made of rubber.

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