Small gas pressure regulating valve for end of gas delivery pipeline

Abstract

The utility model relates to a small -size gas pressure regulating valve for gas delivery pipeline end, including the valve body, interval setting ring body seat and support gas guide plate in the valve cavity channel of valve body, the pressure regulating gas guide mechanism that can follow the change of gas input pressure intensity and the axial translation of central plug -in of ring body seat is installed, and the plate surface center of support gas guide plate face ring body seat installs the shielding sleeve that can adjust the real -time section size of gas guide flow channel with pressure regulating gas guide mechanism cooperation and adapt the existence fluctuation's gas input pressure intensity, wherein, the gas guide plug -in rod of ring body seat of pressure regulating gas guide mechanism penetrates the axial lower end movable plug -in in shielding sleeve. The utility model can simplify structure and volume and reduce the difficulty and manufacturing cost of arrangement, and replace spring part through air bag reset structure to ensure the stability and serviceable life of long -time pressure regulating work.

Description

Technical Field

[0001] This utility model relates to the field of gas pressure regulating valve technology, and in particular to a small gas pressure regulating valve for use at the end of a gas transmission pipeline. Background Technology

[0002] A gas pressure regulating valve is a device that automatically changes the gas flow rate through a regulating valve to maintain a specified outlet gas pressure. It's a special type of valve on a gas pipeline that maintains the stability of the downstream reduced-pressure gas output when the input high-pressure gas pressure fluctuates. In other words, it reduces the upstream pressure to a stable downstream pressure. The primary function of a gas pressure regulating valve is to maintain a stable gas pressure during use, ensuring a stable fuel-air ratio for gas appliances. This means that the reduced-pressure, stable-pressure gas can mix with air in a specific ratio, improving combustion safety and stability. However, existing gas pressure regulating valves are typically large and unsuitable for household environments at the end of gas pipelines, especially due to space constraints in existing gas appliance installations, which limit the space available for traditional gas pressure regulating valves and increase installation difficulty. In particular, existing simplified and miniaturized gas pressure regulating valves typically use spring components to adjust the valve opening size that forms the gas pressure reduction channel. However, after continuous operation for a certain period of time, the spring components will experience fatigue damage, resulting in a weakening of the spring's elasticity and an inability to adapt the valve opening size to the input pressure. This makes it impossible to maintain a stable output pressure of the gas after pressure reduction, and their service life is limited, requiring periodic replacement, which increases the cost of use to some extent. Utility Model Content

[0003] The purpose of this utility model is to provide a small gas pressure regulating valve for the end of a gas pipeline that simplifies the structure and volume, reducing installation difficulty and manufacturing costs, while using an airbag reset structure to replace the spring component, thus ensuring the stability and service life of long-term pressure regulation. This solves the problems of traditional gas pressure regulating valves, which are complex in structure and large in size, have high overall manufacturing costs, and cannot be installed near the end of the gas pipeline close to the gas appliance. Existing small gas pressure regulating valves use springs as an adaptive pressure regulating structure, which are prone to fatigue damage after continuous operation for a certain period of time, making it impossible to effectively and accurately regulate the pressure, maintain a constant output pressure, have a limited service life, and have a high overall cost.

[0004] The technical solution adopted by this utility model is as follows: a small gas pressure regulating valve for the end of a gas transmission pipeline, including a valve body, an annular seat and a supporting gas guide plate are spaced apart in the valve cavity channel of the valve body, a pressure regulating gas guide mechanism that can axially translate with the change of gas input pressure is centrally inserted on the annular seat, and a shielding sleeve that can cooperate with the pressure regulating gas guide mechanism to adjust the real-time cross-sectional size of the gas guide channel to adapt to the fluctuating gas input pressure is installed at the center of the plate surface of the supporting gas guide plate facing the annular seat. The lower axial end of the gas guide rod of the pressure regulating gas guide mechanism that passes through the annular seat is movably inserted into the shielding sleeve.

[0005] According to a preferred embodiment, the pressure regulating and air guiding mechanism includes a pressure-receiving translation plate, an air guiding rod, extrusion columns, an extrusion ring plate, and an annular airbag. The pressure-receiving translation plate is slidably fitted into the valve body in a manner adapted to the cross-section of the valve cavity channel of the valve body. The air guiding rod is inserted into the center of the pressure-receiving translation plate. Multiple extrusion columns, parallel to the axis of the air guiding rod, are arranged circumferentially around the air guiding rod on the plate surface facing the annular seat. The ends of the multiple extrusion columns away from the pressure-receiving translation plate are all connected to the extrusion ring plate. The annular airbag is placed in a receiving annular groove of the annular seat, and the extrusion ring plate is slidably embedded into the receiving annular groove in a manner abutting against the surface of the annular airbag.

[0006] According to a preferred embodiment, the receiving annular groove is formed on the annular end face of the ring body seat away from the supporting air guide plate, and an outer ring anti-detachment ring plate and an inner ring anti-detachment ring plate are also provided on the annular end face of the ring body seat to partially block the opening of the receiving annular groove and prevent the squeezing ring plate from sliding out.

[0007] According to a preferred embodiment, a centrally located through hole is provided on the ring body seat, and a tight-fitting collar capable of inserting the air guide rod is provided in the centrally located through hole.

[0008] According to a preferred embodiment, the pressure-bearing translation plate includes a base plate, a pressure plate threaded onto the base plate, and a gap-filling ring that is clamped and limited by the base plate and the pressure plate in cooperation with each other.

[0009] According to a preferred embodiment, a hollow air guide hole is provided inside the air guide rod, penetrating the end face of the rod body, and a through groove communicating with the hollow air guide hole is provided on the rod body section of the air guide rod below the ring body seat.

[0010] According to a preferred embodiment, a plurality of through-holes are provided on the plate of the supporting air guide plate in a ring-shaped dot matrix distribution.

[0011] The beneficial effects of this utility model are:

[0012] This application effectively simplifies the self-regulating gas pressure structure within the valve body, thereby reducing manufacturing costs and overall size, facilitating convenient installation in smaller spaces, and reducing installation difficulty. By replacing the existing spring with an air bladder structure, this application improves the durability of the reset adjustment structure during gas fluctuations, reduces the failure rate, extends the service life of the elastic reset structure, and to a certain extent improves the structural stability and pressure regulation stability of the pressure regulating valve, extending its continuous operating time. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a preferred small gas pressure regulating valve for the end of a gas transmission pipeline proposed in this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the annular air bladder of a preferred gas pressure regulating valve at the end of a gas transmission pipeline as proposed in this utility model when it is compressed.

[0015] Figure 3 This is a schematic diagram of the unfolded plan view of the gas guide rod of a preferred gas transmission pipeline end small gas pressure regulating valve proposed in this utility model.

[0016] List of reference numerals

[0017] 1: Valve body; 2: Ring seat; 3: Supporting air guide plate; 4: Pressure regulating air guide mechanism; 5: Shielding sleeve; 11: Main valve shell; 12: End cap; 13: Exhaust port; 14: Air inlet; 15: Arc-shaped ring platform; 21: Receiving ring groove; 22: Central through hole; 23: Outer ring anti-detachment ring plate; 24: Inner ring anti-detachment ring plate; 25: Tight-fitting collar; 31: Through air hole; 41: Pressure-bearing translation plate; 42: Air guide rod; 43: Extrusion column; 44: Extrusion ring plate; 45: Ring air bladder; 411: Seat plate; 412: Pressure plate; 413: Gap-filling ring; 421: Hollow air guide hole; 422: Through groove. Detailed Implementation

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0020] The following is a detailed explanation with reference to the accompanying drawings.

[0021] Example 1

[0022] This application provides a small gas pressure regulating valve for the end of a gas transmission pipeline, which includes a valve body 1, an annular seat 2, a supporting gas guide plate 3, a pressure regulating and gas guiding mechanism 4, and a shielding sleeve 5.

[0023] according to Figure 1-3 In one specific embodiment, the inlet end of the valve body 1 can be connected to a gas delivery pipeline. The other end of the valve body 1, away from the gas delivery pipeline, is connected to a gas appliance via a gas hose or other terminal pipe. An annular seat 2 and a supporting guide plate 3 are spaced apart within the valve cavity of the valve body 1 by an interference fit. A pressure-regulating guide mechanism 4, capable of axial translation in response to changes in gas input pressure, is centrally inserted into the annular seat 2. A shielding sleeve 5, capable of adjusting the real-time cross-sectional size of the guide channel in conjunction with the pressure-regulating guide mechanism 4 to adapt to fluctuating gas input pressure, is installed at the center of the surface of the supporting guide plate 3 facing the annular seat 2. This shielding sleeve maintains the pressure stability of the depressurized gas output from the valve body 1. The lower axial end of the guide rod 42 of the pressure-regulating guide mechanism 4, which passes through the annular seat 2, is movably inserted into the shielding sleeve 5.

[0024] Preferably, the valve body 1 includes a main valve housing 11 and an end cap 12 connected to the open end of the main valve housing 11. An exhaust port 13 for outputting depressurized gas is provided at the bottom of the main valve housing 11. An inlet port 14 for inputting high-pressure gas is provided on the end cap 12. Preferably, an arc-shaped ring platform 15 for converging depressurized gas is provided at the inner bottom of the main valve housing 11. Preferably, the arc-shaped ring platform 15 is fixed inside the main valve housing 11 by welding or other means. Preferably, a sealing gasket is embedded on the mating surface of the end cap 12 and the main valve housing 11 to ensure the sealing of the assembly. Preferably, a flange integrally connected to the mating surface of the end cap 12 and the main valve housing 11 is provided on the outer side, thereby ensuring the stability of the connection by bolts passing through the flange.

[0025] Preferably, the inner wall of the upper section of the valve cavity above the ring seat 2 of the valve body 1 is a high-gloss surface to ensure the sliding of the sealing ring, reduce frictional resistance, and make the sliding amount strongly correlated with the air pressure intensity, thereby reducing frictional resistance and impact.

[0026] Preferably, the receiving annular groove 21 is formed on the annular end face of the ring seat 2 away from the supporting air guide plate 3, and an outer anti-detachment ring plate 23 and an inner anti-detachment ring plate 24 are also provided on the annular end face of the ring seat 2 to partially block the opening of the receiving annular groove 21 and prevent the squeezed ring plate 44 from sliding out. Preferably, a central through hole 22 is also provided on the ring seat 2, and a tight-fitting collar 25 for inserting the air guide rod 42 is provided in the central through hole 22. Preferably, the air guide rod 42 is slidably inserted into the tight-fitting collar 25 in a manner that forms a micro-gap. Preferably, the outer wall of the gas guide rod 42 and the inner wall of the sealing collar 25 are both high-gloss surfaces, so that the gas guide rod 42 and the sealing collar 25, with their matching cross-sectional dimensions, can have a sufficiently small assembly gap when sliding together, reducing gas overflow into the assembly gap, improving guiding stability, reducing relative sliding wobbling, thereby improving the smoothness of assembly sliding, reducing the frictional force on the contact surface during sliding, and reducing the resistance of frictional force. Preferably, an installation step is provided on the inner wall of the central through hole 22 to support the sealing collar 25, so that the installation step cooperates with the inner ring anti-detachment plate 24 to limit the installation of the sealing collar 25. Preferably, the sealing collar 25 is made of graphite, graphene, or other materials with low friction coefficient and high wear resistance. Preferably, the ring seat 2 is positioned in the valve body 1 by welding or locking bolts that penetrate the side wall of the valve body 1. Preferably, the outer anti-detachment ring plate 23 and the inner anti-detachment ring plate 24 are fixedly installed on the ring body seat 2 by a number of countersunk screws arranged circumferentially.

[0027] Preferably, a plurality of through-holes 31 are provided on the plate of the supporting air guide plate 3 in a ring-shaped dot matrix pattern, so that the gas output from the through groove 422 can be transported to the exhaust port 13 through the through-holes 31. Preferably, the supporting air guide plate 3 is positioned in the valve body 1 by welding.

[0028] Preferably, the pressure regulating and air guiding mechanism 4 includes a pressure-receiving translation plate 41, an air guiding rod 42, a compression column 43, a compression ring plate 44, and an annular airbag 45. Preferably, the pressure-receiving translation plate 41 is slidably fitted into the valve body 1 in a manner adapted to the cross-section of the valve cavity channel of the valve body 1. Preferably, the air guiding rod 42 is inserted into the center of the pressure-receiving translation plate 41. Preferably, a plurality of compression columns 43, parallel to the axis of the air guiding rod 42, are arranged circumferentially around the air guiding rod 42 on the plate surface of the pressure-receiving translation plate 41 facing the annular seat 2, and the ends of the plurality of compression columns 43 away from the pressure-receiving translation plate 41 are all connected to the compression ring plate 44. Preferably, the annular airbag 45 is disposed in the receiving annular groove 21 of the annular seat 2. The compression ring plate 44 slides into the receiving ring groove 21 in a manner that abuts against the surface of the annular air bladder 45. Thus, when the pressure-receiving translation plate 41 is pushed by the high-pressure gas and undergoes axial translation, the compression ring plate 44 translates synchronously and compresses the annular air bladder 45, thereby limiting the translation amount of the pressure-receiving translation plate 41. This allows the pressure-receiving translation plate 41 to undergo axial translation of different distances under different gas pressures.

[0029] Preferably, the air guide rod 42 is fixedly connected to the pressure-receiving translation plate 41 by passing through it, and the connection can be achieved by welding or integral casting. Preferably, the extrusion column 43 is connected to the pressure-receiving translation plate 41 by welding. Preferably, the extrusion column 43 is also connected to the extrusion ring plate 44 by welding. Preferably, the lower surface of the extrusion ring plate 44 is provided with a silicone pad to reduce the friction intensity between it and the annular airbag 45. Preferably, the surface of the annular airbag 45 is coated with a wear-resistant layer to improve the wear resistance of its wall and extend its service life. Preferably, the bottom of the annular airbag 45 can be adhered to the bottom surface of the cavity of the receiving annular groove 21 to improve the placement stability.

[0030] Preferably, the pressure-bearing translational plate 41 includes a seat plate 411, a pressure plate 412 threadedly connected to the seat plate 411, and a gap-filling ring 413 that is clamped and limited by the seat plate 411 and the pressure plate 412 in cooperation with each other. Preferably, the top surface of the seat plate 411 is provided with an external thread, and the inner ring wall of the lower section of the pressure plate 412, which is an annular plate, is provided with an internal thread, so that the two can be threaded together. More preferably, a countersunk screw is also threaded into the bottom surface of the seat plate 411 to help limit its connection with the pressure plate 412. More preferably, the upper section of the pressure plate 412 away from the seat plate 411 is provided with a concave curved surface, so as to facilitate the central collection of the input gas.

[0031] Preferably, a hollow air guide hole 421 penetrating the end face of the air guide rod 42 is formed inside the air guide rod 42. Preferably, a through groove 422 communicating with the hollow air guide hole 421 is formed on the section of the air guide rod 42 below the annular seat 2, thereby forming an air guide channel within the air guide rod 42 that connects the valve chambers at both ends of the annular seat 2. Preferably, multiple through grooves 422 are circumferentially spaced on the outer surface of the air guide rod 42 with their groove widths increasing continuously from top to bottom. Preferably, the through groove 422 has a groove width that gradually expands along the axial direction of the air guide rod 42, that is, the complete through groove 422 has a fan-shaped cross-section, such that its lower end width is greater than its upper end width, thereby being positively correlated with the compression change of the annular airbag 45 when it is compressed by the input combustion gas. This is because the driving force required for a unit amount of compression in the early stage of compression of the annular gas bladder 45 is much less than that required for a unit amount of compression in the later stage of compression. That is, in the later stage of compression, the gas pressure needs to increase more to achieve the same volume pressure. Therefore, when the minimum cross-section of the flow channel is reduced by less than that in the early stage, the increase in the gas flow velocity during this period is greater than that in the early stage. As a result, the total gas delivery per unit time remains stable, and the actual output gas pressure can maintain a high degree of stability. Preferably, the lower axial end of the gas guide rod 42 is inserted into the shielding sleeve 5, thereby adjustingly shielding the bottom opening of the hollow gas guide hole 421 and part of the through groove 422. This changes the cross-sectional size of the through groove 422 not shielded by the shielding sleeve 5 during the axial lifting and translating of the gas guide rod 42, thereby adjusting the actual flow section of the through groove 422 and the minimum flow channel section of the gas guide channel. This allows gas with different pressures to flow out of the through groove 422 with a variable actual flow section, thus maintaining the pressure of the final output gas flow.

[0032] Specifically, when the gas pressure input to the inlet 14 of valve body 1 decreases, the compressed annular gas bladder 45 expands, thereby pushing the pressure-receiving translation plate 41, the gas guide rod 42, the extrusion column 43, and the extrusion ring plate 44 to move axially upwards simultaneously. This causes the gas guide rod 42 to move out of the shielding sleeve 5, shortening its insertion length into the shielding sleeve 5. Consequently, the exposed cross-section of the through groove 422 increases, increasing the cross-sectional size of the minimum cross-section of the gas guide channel. This allows the instantaneous flow rate of the low-pressure gas to increase. Due to the reduction in instantaneous flow velocity, the required gas volume output per unit time remains constant, thus maintaining the pressure of the gas flow output at the output end. When the gas pressure input to the inlet 14 of valve body 1 increases, the pressure-receiving translation plate 41 moves axially downward under the push of the increased gas pressure, by further compressing the annular gas bag 45 through the extrusion column 43 and the extrusion ring plate 44. This causes the gas guide rod 42 to move axially downward simultaneously, so that the gas guide rod 42 moves into the shielding sleeve 5, and the length of its insertion into the shielding sleeve 5 is extended. This reduces the exposed cross section of the through groove 422, and reduces the cross section size at the minimum cross section position of the gas guide channel. This reduces the instantaneous flow rate of the high-pressure gas. Due to the increase in instantaneous flow velocity, the volume of gas that needs to be output per unit time remains unchanged, so as to maintain the pressure of the gas flow output at the output end remains unchanged.

[0033] Preferably, a sealing gasket capable of filling the assembly gap is also embedded in the inner wall of the shielding sleeve 5. Preferably, the shielding sleeve 5 is connected to the supporting air guide plate 3 by welding or integral forming.

[0034] For surface connections between components not explicitly specified in this application, conventional bolt connections, snap-fit ​​connections, or fixed connections such as welding can be used. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0035] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A small gas pressure regulating valve for use at the end of a gas transmission pipeline, comprising a valve body (1), characterized in that, An annular seat (2) and a supporting air guide plate (3) are provided at intervals in the valve cavity channel of the valve body (1). A pressure-regulating gas guiding mechanism (4) capable of axial translation in response to changes in gas input pressure is centrally inserted into the annular base (2). A shielding sleeve (5) is installed at the center of the surface of the supporting gas guiding plate (3) facing the annular base (2), capable of adjusting the real-time cross-sectional size of the gas guiding channel in conjunction with the pressure-regulating gas guiding mechanism (4) to adapt to fluctuating gas input pressure. The lower axial end of the air guide rod (42) of the pressure regulating air guide mechanism (4) through the ring seat (2) is movably inserted into the shielding sleeve (5).

2. The small gas pressure regulating valve for the end of a gas transmission pipeline as described in claim 1, characterized in that, The pressure regulating and air guiding mechanism (4) includes a pressure-receiving translation plate (41), an air guiding rod (42), a compression column (43), a compression ring plate (44), and an annular airbag (45), wherein, The pressure-receiving translation plate (41) is slidably fitted into the valve body (1) in a manner that adapts to the cross-section of the valve cavity channel of the valve body (1), and the air guide rod (42) is inserted into the center of the pressure-receiving translation plate (41). On the surface of the pressure-receiving translation plate (41) facing the ring seat (2), a plurality of extrusion columns (43) are arranged circumferentially around the air guide rod (42) and are parallel to the axis of the air guide rod (42). The ends of the plurality of extrusion columns (43) away from the pressure-receiving translation plate (41) are all connected to the extrusion ring plate (44). The annular airbag (45) is placed in the receiving annular groove (21) of the annular seat (2), and the extrusion annular plate (44) slides into the receiving annular groove (21) in such a way that it abuts against the surface of the annular airbag (45).

3. The small gas pressure regulating valve for the end of a gas transmission pipeline as described in claim 2, characterized in that, The receiving annular groove (21) is opened on the annular end face of the ring body seat (2) away from the supporting air guide plate (3), and an outer ring anti-detachment ring plate (23) and an inner ring anti-detachment ring plate (24) are also provided on the annular end face of the ring body seat (2) to partially block the opening of the receiving annular groove (21) and prevent the squeezing ring plate (44) from sliding out.

4. The small gas pressure regulating valve for the end of a gas transmission pipeline as described in claim 3, characterized in that, A centrally located through hole (22) is provided on the ring body seat (2), and a tight-fitting collar (25) is provided in the centrally located through hole (22) for inserting the air guide rod (42).

5. The small gas pressure regulating valve for the end of a gas transmission pipeline as described in claim 4, characterized in that, The pressure-receiving translation plate (41) includes a seat plate (411), a pressure plate (412) threaded onto the seat plate (411), and a gap-filling ring (413) that is clamped and limited by the seat plate (411) and the pressure plate (412) in cooperation with each other.

6. The small gas pressure regulating valve for the end of a gas transmission pipeline as described in claim 5, characterized in that, A hollow air guide hole (421) is provided inside the air guide rod (42) and penetrating the end face of the rod body. A through groove (422) communicating with the hollow air guide hole (421) is provided on the rod section of the air guide rod (42) below the ring body seat (2).

7. The small gas pressure regulating valve for the end of a gas transmission pipeline as described in claim 6, characterized in that, A number of through-holes (31) are provided on the plate of the supporting air guide plate (3) in a ring-shaped dot matrix pattern.

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