Fuel gas pressure regulating valve with protective structure

Abstract

The utility model relates to the technical field of pressure regulating valves, in particular to a gas pressure regulating valve with a protective structure, which comprises a lower shell, an upper shell, a gas inlet hole, a gas outlet hole, a valve membrane arranged in the lower shell, a connecting rod rotationally arranged in the lower shell, a threaded hole formed in the middle of the upper shell, an adjusting knob screwed in the threaded hole of the upper shell, a spring and a sealing cover. An upper extending part is fixedly arranged at the top of an outer ring of the adjusting knob, a lower clamping groove used for being matched with an external wrench is formed in the middle of the upper extending part, a rubber ring is detachably arranged on the outer side of the upper extending part, the upper extending part and the rubber ring are arranged at the top of the adjusting knob, and the rubber ring is shrunk in the inner groove after being extruded. The gap between the adjusting knob and the threaded hole is filled, the defect that the sealing performance is low in the adjusting process of the adjusting knob is overcome, and the problems that a certain gap exists between the adjusting knob and the valve body, when a user conducts adjustment by himself, the air inlet hole is not closed or the sealing cover is not tightened, and certain potential safety hazards exist are solved.

Description

Technical Field

[0001] This utility model relates to the field of pressure regulating valve technology, and in particular to a gas pressure regulating valve with a protective structure. Background Technology

[0002] Currently, Chinese Patent Publication No. CN103161976B discloses a gas pressure regulating valve, including a valve body with a pressure regulating actuator and a shut-off device. At both ends of the valve body are an inlet ball valve, an outlet ball valve, an inlet valve cover, and an outlet valve cover, respectively. Pressure gauges are also installed at both ends of the valve body. The two ends of the valve body are a gas inlet pipe and a gas outlet pipe, respectively. The gas inlet pipe has two perpendicular gas inlets, one of which is equipped with an inlet ball valve, and the other with an inlet valve cover. The gas outlet pipe has two perpendicular gas outlets, one of which is equipped with an outlet ball valve, and the other with an outlet valve cover. This discloses a conventional pressure regulating valve with a general structure. However, with conventional pressure regulating valves, the top sealing cover needs to be removed before adjusting the pressure. However, there is a certain gap between the adjusting knob and the valve body, and if the user adjusts the pressure themselves, the air inlet may not be sealed or the sealing cover may not be tightened, posing a certain safety hazard. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model proposes a gas pressure regulating valve with a protective structure, which solves the above technical problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a gas pressure regulating valve with a protective structure, comprising a lower housing, an upper housing detachably connected to the lower housing, an air inlet on one side of the lower housing, an air outlet on the other side of the lower housing, a valve diaphragm inside the lower housing, a rotatable connecting rod inside the lower housing, and a threaded hole in the middle of the upper housing. One side of the connecting rod is fitted with the air inlet, and the other side of the connecting rod is connected to the valve diaphragm. The valve also includes an adjusting knob screwed into the threaded hole of the upper housing, a spring between the adjusting knob and the valve diaphragm, and a sealing cap for sealing the threaded hole. The top of the outer ring of the adjusting knob is fixed with an upper extension. The middle of the upper extension has a lower groove for engaging with an external wrench. A rubber ring is detachably provided on the outer side of the upper extension. The upper extension has an inner groove at the rubber ring that gradually narrows from both sides towards the middle.

[0005] Furthermore, an inner ring extends from the inner side of the rubber ring, and a threaded groove is connected to the upper extension near the inner groove. An adjusting screw is screwed into the threaded groove, and an adjusting cone with a gradually increasing diameter from bottom to top is provided in the middle of the adjusting screw.

[0006] Furthermore, a sealing ring is provided between the top of the adjusting screw and the adjusting cone surface.

[0007] Furthermore, the rubber ring has an arc-shaped groove in the middle of its outer side, and the rubber ring has extended protrusions on the upper and lower sides of the arc-shaped groove.

[0008] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0009] This gas pressure regulating valve with a protective structure first connects the air inlet on one side of the lower housing to the external air intake pipe, and then connects the air outlet on the other side of the lower housing to the external gas pipe. During use, the valve is adjusted by rotating an external wrench. Because the adjusting knob engages with the threaded hole on the upper housing, the adjustment spring exerts downward pressure during rotation. Since the top of the adjusting knob has an upper extension and a rubber ring, the outer thread of the adjusting knob contacts the threaded hole. The rubber ring is compressed and retracts into the inner groove, filling the gap between the adjusting knob and the threaded hole. This avoids the disadvantage of low sealing during adjustment and solves the problem of a certain gap between the adjusting knob and the valve body, which could lead to a safety hazard if the air inlet is not sealed or the sealing cap is not tightened when the user adjusts the valve. Attached Figure Description

[0010] Figure 1 This is a top view schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a schematic cross-sectional view of the structure of this utility model;

[0012] Figure 3 This is a utility model Figure 2 Enlarged structural diagram at point A in the diagram;

[0013] Figure 4 This is a top view schematic diagram of the adjustment knob structure of this utility model;

[0014] Figure 5 This is a partial cross-sectional schematic diagram of the adjustment knob of this utility model. Detailed Implementation

[0015] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0016] refer to Figures 1 to 5 This embodiment provides a gas pressure regulating valve with a protective structure, including a lower housing 1, an upper housing 2 detachably connected to the lower housing 1, an air inlet 3 on one side of the lower housing 1, an air outlet 4 on the other side of the lower housing 1, a valve diaphragm 5 inside the lower housing 1, a connecting rod 6 rotatably located inside the lower housing 1, and a threaded hole 7 in the middle of the upper housing 2. One side of the connecting rod 6 is fitted with the air inlet 3, and the other side of the connecting rod 6 is connected to the valve diaphragm 5.

[0017] It also includes an adjustment knob 8 screwed into the threaded hole 7 of the upper housing 2, a spring 9 located between the adjustment knob 8 and the valve diaphragm 5, and a sealing cover 10 for sealing the threaded hole 7. The top of the outer ring of the adjustment knob 8 is fixed with an upper extension 11. The middle of the upper extension 11 is provided with a lower groove 12 for cooperating with an external wrench. A rubber ring 13 is detachably provided on the outer side of the upper extension 11. The upper extension 11 is provided with an inner groove 14 located at the rubber ring 13, which gradually narrows from both sides towards the middle.

[0018] When using, first connect the air inlet on one side of the lower housing to the external air intake pipe, and then connect the air outlet on the other side of the lower housing to the external gas pipe. During use, adjust the rotation by turning the external wrench. Since the adjustment knob engages with the threaded hole of the upper housing, the adjustment spring will exert downward pressure during the rotation of the adjustment knob. Because the top of the adjustment knob has an upper extension and a rubber ring, the outer thread of the adjustment knob contacts the threaded hole. The rubber ring will be squeezed and shrink in the inner groove, filling the gap between the adjustment knob and the threaded hole, thus avoiding the disadvantage of low sealing during the adjustment of the adjustment knob.

[0019] The inner side of the rubber ring 13 extends into an inner ring 131. The upper extension 11 is connected to a threaded groove 111 near the inner groove 14. An adjusting screw 15 is screwed into the threaded groove 111. The adjusting screw 15 has an adjusting cone surface 151 with a diameter that gradually increases from bottom to top in the middle.

[0020] After tightening the adjustment knob to the appropriate position, insert the adjustment screw into the threaded groove and then tighten the adjustment screw. Since the outer side of the adjustment screw has an adjustment cone surface with a gradually increasing diameter from bottom to top, the tightness between the rubber ring and the threaded hole can be controlled by adjusting the longitudinal movement distance of the adjustment screw, thereby improving the sealing effect.

[0021] A sealing ring 16 is provided between the top of the adjusting screw 15 and the adjusting cone surface 151. After long-term use, a partial gap will be generated between the sealing ring and the inner groove. Since the inner groove is connected to the threaded groove, some gas will leak from the position of the adjusting screw. The sealing ring enhances the sealing performance between the adjusting screw and the threaded groove.

[0022] The rubber ring 13 has an arc-shaped groove 132 in the middle of its outer side. The rubber ring 13 has extended protrusions 133 on the upper and lower sides of the arc-shaped groove 132. After the rubber ring contacts the threaded hole, the arc-shaped groove in the middle will fit with the tip of the threaded hole. After the arc-shaped groove and the extended protrusion of the rubber ring are squeezed, they can shrink towards the adjusting cone surface. When it is necessary to adjust the tightness, the rubber ring will be squeezed and deformed towards the extended protrusion by the adjusting screw, thereby increasing the adjustment range.

[0023] The sealing cover 10 has a cross-section 10a on one side. The shape of the sealing cover 10 will be irregular and requires a special wrench to open, so as to prevent users from disassembling and assembling the sealing cover themselves.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0028] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A gas pressure regulating valve with a protective structure, comprising a lower housing (1), an upper housing (2) detachably connected to the lower housing (1), an air inlet (3) on one side of the lower housing (1), an air outlet (4) on the other side of the lower housing (1), a valve diaphragm (5) in the lower housing (1), a connecting rod (6) rotatably disposed in the lower housing (1), and a threaded hole (7) in the middle of the upper housing (2), wherein one side of the connecting rod (6) is fitted with the air inlet (3), and the other side of the connecting rod (6) is connected to the valve diaphragm (5); characterized in that It also includes an adjustment knob (8) screwed into the threaded hole (7) of the upper housing (2), a spring (9) between the adjustment knob (8) and the valve diaphragm (5), and a sealing cover (10) for sealing the threaded hole (7). The top of the outer ring of the adjustment knob (8) is fixed with an upper extension (11). The middle of the upper extension (11) is provided with a lower slot (12) for cooperating with an external wrench. The outer side of the upper extension (11) is detachably provided with a rubber ring (13). The upper extension (11) is provided with an inner groove (14) at the rubber ring (13) that gradually narrows from both sides to the middle.

2. A gas pressure regulating valve with a protective structure according to claim 1, characterized in that: The inner ring (131) extends from the inner side of the rubber ring (13), and the upper extension (11) is connected to the inner groove (14) by a threaded groove (111). An adjusting screw (15) is screwed into the threaded groove (111), and the adjusting screw (15) has an adjusting cone surface (151) with a diameter that gradually increases from bottom to top in the middle.

3. The gas pressure regulating valve with a protection structure according to claim 2, characterized in that: A sealing ring (16) is provided between the top of the adjusting screw (15) and the adjusting cone surface (151).

4. A gas pressure regulating valve with a protective structure according to claim 2, characterized in that: The rubber ring (13) has an arc-shaped groove (132) in the middle of its outer side, and the rubber ring (13) has an extended protrusion (133) on the upper and lower sides of the arc-shaped groove (132).

5. A gas pressure regulating valve with a protective structure according to claim 2, characterized in that: The sealing cap (10) has a cross section (10a) on one side.

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