Gas pressure stabilizer

Abstract

The utility model discloses a gas pressure stabilizer which comprises a valve body, a valve cover, a linear cavity, an adjusting assembly and a gas leakage prevention assembly, the upper portion of the valve body covers the valve cover, a pressure balance cavity is formed between the valve body and the valve cover, and a pressure feedback hole is formed in the valve body at the contact portion of the valve body and the pressure balance cavity; the linear cavity penetrates through the lower portion of the valve body, an adjusting assembly is arranged perpendicular to the valve body, and the adjusting assembly sequentially penetrates through the pressure balance cavity and the linear cavity. And the air leakage prevention assembly is arranged on the valve cover. When the diaphragm is pressed to move, the spring is pushed or pulled, and the adjusting cone is driven by the adjusting rod to move in the direction perpendicular to the valve body. A gas pressure stabilizer achieves a pressure stabilizing effect by adjusting a gap between a flow channel and an adjusting cone. Due to the fact that a flow channel of the valve body is designed in a linear mode, transition between the air inlet and the air outlet is smooth, fluid resistance can be greatly reduced, and large flow can be output under small pressure difference.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage stabilizing control, and relates to a gas pressure regulator. Background Art

[0002] The main function of a pressure stabilizing valve is to reduce the medium with high pressure to the medium with low pressure, or to keep the medium in a certain area within a certain pressure range.

[0003] In the prior art, the flow path of the pressure stabilizing valve has many turns, and under the condition of the same flow rate, the pressure loss is large; most pressure stabilizing valves directly reduce the pressure through the diaphragm at the air inlet end, with a small voltage stabilizing range and poor sensitivity; the valve orifice diameter of the pressure stabilizing valve is generally small, and there is a situation of diameter change, which affects the maximum available flow rate of the valve. Summary of the Utility Model

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A gas pressure regulator includes a valve body, a valve cover, a straight cavity, an adjusting assembly and an air leakage prevention assembly. The upper part of the valve body covers the valve cover. A pressure balance cavity is provided between the valve body and the valve cover. At the contact part of the valve body and the pressure balance cavity, a pressure feedback hole is provided on the valve body; the straight cavity penetrates through the lower part of the valve body, and an adjusting assembly is provided perpendicular to the valve body. The adjusting assembly sequentially passes through the pressure balance cavity and the straight cavity; the air leakage prevention assembly is provided on the valve cover;

[0006] The adjusting assembly includes a diaphragm, a spring, an adjusting rod and an adjusting cone. The spring, the adjusting rod and the adjusting cone are sequentially connected. The spring is located in the pressure balance cavity, the adjusting cone is located in the straight cavity, and the adjusting rod penetrates through the pressure balance cavity and the straight cavity; a diaphragm connected to the spring is provided in the pressure balance cavity. When the diaphragm moves under pressure, it pushes or pulls the spring to drive the adjusting cone to move in a direction perpendicular to the valve body through the adjusting rod;

[0007] The air leakage prevention assembly includes a breathing hole protection cover and an anti-overflow ball. A first breathing hole is provided on the valve cover, and the breathing hole protection cover covers the first breathing hole; a second breathing hole is provided on the breathing hole protection cover, and the anti-overflow ball is provided in the breathing hole.

[0008] As a further scheme of the utility model: the top of the channel of the first breathing hole is in a cross groove shape.

[0009] As a further scheme of the utility model: it further includes a protection cover, and a detachable protection cover is provided on the top of the valve cover.

[0010] As a further solution of the utility model: It further includes a plurality of seals, and seals are provided between the valve body and the valve cover, between the protective cover and the valve cover, between the breathing hole protective cover and the valve cover, and between the adjusting rod and the valve body.

[0011] As a further solution of the utility model: The adjusting assembly further includes an upper pressing plate and a lower pressing plate, the upper pressing plate and the lower pressing plate are connected to the adjusting rod by nuts, the diaphragm is located between the upper pressing plate and the lower pressing plate, and both ends of the diaphragm extend from between the upper pressing plate and the upper pressing plate and are fixed at the connection between the valve body and the valve cover.

[0012] As a further solution of the utility model: The adjusting assembly further includes a pressure regulating member, a pressure regulating member is provided at the top of the valve cover, one end of the spring is connected to the adjusting rod, and the other end is connected to the pressure regulating member.

[0013] As a further solution of the utility model: The adjusting assembly further includes a retaining ring, and a retaining ring is provided between the bottom of the adjusting cone and the adjusting rod.

[0014] As a further solution of the utility model: The taper of the lower part of the valve body matches the taper of the adjusting cone.

[0015] Advantages of the utility model:

[0016] A gas pressure regulator of the utility model has a straight cavity for the flow channel of the valve body. By adjusting the gap between the flow channel and the adjusting cone, the pressure stabilizing effect can be achieved. Since the flow channel of the valve body adopts a straight design, the transition between the air inlet and the air outlet is smooth, the flow direction remains unchanged, and there is no obvious turning position, which can greatly reduce the fluid resistance and can output a large flow rate even at a small pressure difference. The pressure feedback of the gas pressure regulator directly flows the outlet pressure into the pressure balance chamber, and the pressure in the pressure balance chamber is consistent with the spring. When the outlet pressure changes, the outlet pressure is timely fed back to the pressure balance chamber, and the diaphragm drives the adjusting cone to rise or fall according to the set pressure, increasing or decreasing the flow channel area to achieve the effect of constant outlet pressure. If the diaphragm fails or ruptures, after the leakage pressure exceeds a certain value, the anti-overflow ball in the air leakage prevention assembly is pushed up by the air pressure to block the flow channel connected to the outside, so as to achieve the effect of preventing gas leakage. The anti-overflow ball avoids the leakage of dangerous gases and makes the gas pressure regulator safer and more reliable.

[0017] A gas pressure regulator has the characteristics of small pressure drop, large flow rate, and sensitive adjustment. In addition, this valve is a secondary pressure feedback valve, which is more sensitive in response than a single diaphragm pressure stabilizing valve; the outlet pressure is adjustable, and multiple outlet pressures are available; it is suitable for equipment for low-pressure or medium-low-pressure gas supply such as residential, commercial, and industrial gas. Description of the drawings

[0018] Figure 1It is a schematic structural diagram of a gas pressure regulator;

[0019] Figure 2 It is a schematic structural diagram of another perspective of a gas pressure regulator;

[0020] Figure 3 It is a schematic structural diagram of the first breathing hole of a gas pressure regulator;

[0021] Figure 4 It is a schematic structural diagram of another perspective of the first breathing hole of a gas pressure regulator;

[0022] Figure 5 It is a schematic structural diagram of the diaphragm installation of a gas pressure regulator.

[0023] As shown in the figure:

[0024] 1 - valve body, 11 - pressure feedback hole;

[0025] 2 - valve cover, 21 - protective cover, 22 - first breathing hole, 23 - breathing hole protective cover, 24 - anti - overflow ball, 25 - cross - groove type;

[0026] 3 - linear cavity;

[0027] 4 - pressure balance cavity;

[0028] 51 - diaphragm, 52 - spring, 53 - adjusting rod, 54 - adjusting cone, 55 - upper pressure plate, 56 - lower pressure plate, 57 - nut, 58 - pressure regulating part, 59 - retaining ring;

[0029] 6 - seal. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. It should be understood that the present application is not limited by the example embodiments disclosed herein. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0033] In the embodiments of the present utility model, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] As Figures 1-5 shown, a gas pressure regulator includes a valve body 1, a valve cover 2, a linear cavity 3, an adjustment assembly, and an air leakage prevention assembly. The upper part of the valve body 1 covers the valve cover 2. A pressure balance cavity 4 is provided between the valve body 1 and the valve cover 2. A pressure feedback hole 11 is provided at the contact part between the valve body 1 and the pressure balance cavity 4. The linear cavity 3 penetrates through the lower part of the valve body 1. An adjustment assembly is provided perpendicular to the valve body 1. The adjustment assembly sequentially passes through the pressure balance cavity 4 and the linear cavity 3. An air leakage prevention assembly is provided on the valve cover 2.

[0035] Among them, the adjustment assembly includes a diaphragm 51, a spring 52, an adjustment rod 53, and an adjustment cone 54. The spring 52, the adjustment rod 53, and the adjustment cone 54 are sequentially connected. The spring 52 is located in the pressure balance cavity 4. The adjustment cone 54 is located in the linear cavity 3. The adjustment rod 53 penetrates through the pressure balance cavity 4 and the linear cavity 3. A diaphragm 51 connected to the spring 52 is provided in the pressure balance cavity 4. When the diaphragm 51 is pressured and moves, it pushes or pulls the spring 52 to drive the adjustment cone 54 to move in the direction perpendicular to the valve body 1 through the adjustment rod 53.

[0036] As Figure 1 shown, the working principle of the gas pressure regulator is as follows: One end of the linear cavity 3 is an air inlet, and the other end is an air outlet. The gas source enters from the air inlet, flows through the passage formed by the linear cavity 3 in the inner cavity of the valve body 1 and the adjustment cone 54, and then flows to the air outlet. When pressure acts on the diaphragm 51, the deformation of the diaphragm 51 will push or pull the spring 52, thereby changing the compression or tension state of the spring 52, so as to realize the stable adjustment of pressure. Specifically:

[0037] The gas supply is slowly opened, and the gas flows through the regulating cone 54 to the outlet of the pressure stabilizing valve. The pressure at the outlet enters the pressure balance chamber 4 through the pressure feedback hole 11 and acts on the diaphragm 51. If the outlet pressure is greater than the set spring 52 force, the diaphragm 51 will lift, and the regulating cone 54 assembly connected to it will rise accordingly, thereby reducing the flow rate; if the outlet pressure drops, the pressure in the pressure balance chamber 4 drops, and the diaphragm 51, the regulating rod 53, and the regulating cone 54 will follow and drop, further opening the flow passage area, and the outlet pressure will increase again; if the outlet pressure increases, for example, due to reduced consumption, the regulating cone 54 will rise further, and the pressure stabilizing valve tends to be in a closed state, and the outlet pressure will drop again. Therefore, by changing the gas flow rate, the outlet pressure is kept constant.

[0038] Among them, the air leakage prevention component includes a breathing hole protection cover 23 and an anti-overflow ball 24. The valve cover 2 is provided with a first breathing hole 22, and the breathing hole protection cover 23 covers the first breathing hole 22; the breathing hole protection cover 23 is provided with a second breathing hole, and the anti-overflow ball 24 is arranged in the first breathing hole 22.

[0039] The second breathing hole is arranged on the circumferential surface of the breathing hole protection cover 23, and the connection with the outside is realized through the second breathing hole to maintain the air pressure balance inside and outside the pressure balance chamber. When the gas passes through the straight cavity 3, the gas generates an upward buoyancy force on the anti-overflow ball 24. When the resistance of the gas to the anti-overflow ball 24 increases or decreases, the anti-overflow ball 24 will rise or fall in the channel of the first breathing hole 22, and this resistance is proportional to the flow rate of the gas. When the buoyancy force and the resistance received by the anti-overflow ball 24 reach equilibrium, the anti-overflow ball 24 will keep the channel of the first breathing hole 22 in a stable position.

[0040] If the diaphragm of the pressure stabilizing valve is under the action of high pressure for a long time, it will cause the material to gradually age, harden, and the elasticity to decline, thus unable to play the regulating role normally. If the diaphragm 51 fails or ruptures, after the leakage pressure exceeds a certain value, the anti-overflow ball 24 is pushed up by the air pressure and reaches the top of the first breathing hole 22, blocking the second breathing hole, and then blocking the flow passage connected to the outside, so as to achieve the effect of preventing gas leakage. The anti-overflow ball 24 avoids the leakage of dangerous gases and makes the gas pressure regulator safer and more reliable.

[0041] In this embodiment, the top of the channel of the first breathing hole 22 is a cross groove type 25. Specifically, currently, the first breathing hole 22 of the pressure stabilizing valve has no emergency self-sealing function. If the diaphragm 51 ruptures, there is a hidden danger of external leakage when the gas is combustible gas. Figure 3 and 4As shown, the anti-overflow ball 24 is installed inside the first breathing hole 21, and the flow channel of the first breathing hole 22 leading to the anti-overflow ball 24 adopts a cross-groove type 25; after the leakage pressure exceeds a certain value, the anti-overflow ball 24 is automatically pushed up to block the flow channel connected to the outside. Specifically, during normal use, the air pressure of the air entering and leaving through the second breathing hole is equal to the atmospheric pressure, and the anti-overflow ball 24 is located at the bottom of the breathing hole protective cover 23. When the diaphragm 51 fails or ruptures, the pressure at the intake port of the pressure stabilizing valve will enter the first breathing hole 22 through the damaged diaphragm 51 and be discharged from the first breathing hole 22; when the gas pressure thrust is greater than the self-weight of the anti-overflow ball 24, the anti-overflow ball 24 is pushed upward to block the second breathing hole, so as to achieve the effect of preventing gas leakage. Among them, the breathing hole protective cover 23 is made of copper, and the anti-overflow ball 24 is a small steel ball.

[0042] In this embodiment, it further includes a protective cover 21, and a detachable protective cover 21 is provided at the top of the valve cover 2. As Figure 1 shown, the valve cover 2 is integrally in a "Ji" shape structure, which is divided into a valve cover body and a protective cover 21, facilitating the disassembly, assembly and maintenance of the pressure stabilizing valve. The valve cover body is provided with a first breathing hole 22, so that the gas in the cavity connecting the upper part of the diaphragm 51 and the first breathing hole 22 can only enter and exit through the first breathing hole 22.

[0043] In this embodiment, it further includes a plurality of seals 6, and seals 6 are provided between the valve body 1 and the valve cover 2, between the protective cover 21 and the valve cover 2, between the breathing hole protective cover 23 and the valve cover 2, and between the adjusting rod 53 and the valve body 1. Ensure the sealing between each component.

[0044] In this embodiment, as Figure 5 shown, the adjusting assembly further includes an upper pressure plate 55 and a lower pressure plate 56, and the diaphragm 51 is detachably assembled with the upper pressure plate 55 and the lower pressure plate 56. Specifically, the upper pressure plate 55 and the lower pressure plate 56 are connected to the adjusting rod 53 through a nut 57, the diaphragm 51 is located between the upper pressure plate 55 and the lower pressure plate 56, and both ends of the diaphragm 51 extend from between the upper pressure plate 55 and the upper pressure plate 55 and are fixed at the connection of the valve body 1 and the valve cover 2. Among them, seals 6 are also provided at the connection of the diaphragm 51 with the valve body 1 and the valve cover 2. At present, the internal structure of the pressure stabilizing valve is mostly a riveted structure, which is not convenient for replacement and disassembly. The pressure stabilizing valve of the present invention adopts a detachable installation of the diaphragm 51, which has the advantages of convenient installation and convenient replacement of accessories.

[0045] Furthermore, the adjusting assembly further includes a pressure regulating member 58, and a pressure regulating member 58 is provided at the top of the valve cover 2. One end of the spring 52 is connected to the adjusting rod 53, and the other end is connected to the pressure regulating member 58. The regulating member is used for fixedly installing the spring 52.

[0046] Further, the adjusting assembly further includes a retaining ring 59 disposed between the bottom of the adjusting cone 54 and the adjusting rod 53. The retaining ring 59 keeps the positions of components such as the adjusting cone 54 correct, indirectly assisting the precise adjustment of the pressure stabilizing valve. The retaining ring 59 can also play a positioning role to ensure that the adjusting rod 53 can move accurately and stably during the adjustment process. The retaining ring 59 can also effectively prevent the pressure from pulling out the valve core or related components from the valve body 1, thereby avoiding air leakage and ensuring the sealing performance of the system.

[0047] In this embodiment, the taper of the lower part of the valve body 1 matches the taper of the adjusting cone 54. As Figure 2 shown, the dotted line is the air inlet and outlet channel of the valve body 1. The adjusting cone 54 is conical, the lower part of the valve body 1 is conical, and the adjusting cone 54 moves within the valve body 1, so that when the gas is stabilized, the flow direction remains unchanged, greatly reducing the flow resistance. Among them, the pressure stabilizing effect of the outlet pressure is ensured by the flow channel between the flow regulating cone 54 and the taper of the valve body 1. Therefore, it is necessary to ensure the fitting tolerance between the conical surface angle of the adjusting cone 54 and the conical surface angle of the valve body 1; further, the adjusting rod 53 should be smooth during the up and down movement, so it is necessary to ensure the fitting clearance and surface finish between the adjusting rod 53 and the valve body 1.

[0048] For a gas pressure stabilizer of the present utility model, the flow channel of the valve body 1 is a straight cavity 3, and the pressure stabilizing effect is achieved by adjusting the clearance between the flow channel and the adjusting cone 54. Since the flow channel of the valve body 1 adopts a straight design, the transition between the air inlet and the air outlet is smooth, the flow direction remains unchanged, there is no obvious turning position, which can greatly reduce the fluid resistance, and a large flow rate can be output even at a small pressure difference. The pressure feedback of the gas pressure stabilizer directly flows the outlet pressure into the pressure balance chamber 4, and the pressure in the pressure balance chamber 4 is kept consistent with the spring 52. When the outlet pressure changes, the outlet pressure is timely fed back to the pressure balance chamber 4, and the diaphragm 51 drives the adjusting cone 54 to rise or fall according to the set pressure, increasing or decreasing the flow channel area to achieve the effect of constant outlet pressure.

[0049] A new type of gas pressure stabilizing valve has the characteristics of small pressure drop, large flow rate, and sensitive adjustment. In addition, this valve is a secondary pressure feedback valve, which is more sensitive than the pressure stabilizing valve with a single diaphragm 51; the outlet pressure is adjustable, and multiple outlet pressures can be selected; it is applicable to equipment for low-pressure or medium-low-pressure gas supply such as residential, commercial, and industrial gas.

[0050] It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0051] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas regulator, characterized in that: It comprises a valve body, a valve cover, a linear cavity, an adjusting component and an anti-leakage component. The upper part of the valve body covers the valve cover, a pressure balancing cavity is arranged between the valve body and the valve cover, and a pressure feedback hole is arranged on the valve body at the contact part between the valve body and the pressure balancing cavity; the linear cavity runs through the lower part of the valve body, an adjusting component is arranged perpendicular to the valve body, and the adjusting component passes through the pressure balancing cavity and the linear cavity in sequence; the anti-leakage component is arranged on the valve cover; The regulating assembly comprises a diaphragm, a spring, an regulating rod and an regulating cone, wherein the spring, the regulating rod and the regulating cone are connected in sequence, the spring is located in the pressure balancing chamber, the regulating cone is located in the linear chamber, and the regulating rod penetrates the pressure balancing chamber and the linear chamber; a diaphragm connected to the spring is arranged in the pressure balancing chamber, and when the diaphragm moves under pressure, the spring is pushed or pulled to drive the regulating cone to move perpendicular to the valve body through the regulating rod; The anti-leakage component includes a breathing hole protection cover and an anti-overflow ball. The valve cover is provided with a first breathing hole, and the breathing hole protection cover covers the first breathing hole; the breathing hole protection cover is provided with a second breathing hole, and the anti-overflow ball is arranged in the breathing hole.

2. The gas regulator according to claim 1, characterized in that: The top of the channel of the first breathing hole is a cross groove type.

3. The gas regulator according to claim 1, characterized in that: It also includes a protective cover, and a detachable protective cover is provided on the top of the valve cover.

4. The gas regulator according to claim 3, characterized in that: The invention also comprises a plurality of sealing members, wherein the sealing members are arranged between the valve body and the valve cover, between the protective cover and the valve cover, between the breathing hole protective cover and the valve cover, and between the regulating rod and the valve body.

5. The gas regulator according to claim 1, characterized in that: The adjusting assembly also includes an upper pressure plate and a lower pressure plate, which are connected to the adjusting rod by nuts, and the diaphragm is located between the upper pressure plate and the lower pressure plate. Both ends of the diaphragm extend from between the upper pressure plate and the lower pressure plate and are fixed at the connection between the valve body and the valve cover.

6. The gas regulator according to claim 5, characterized in that: The regulating assembly also includes a pressure regulating piece, and a pressure regulating piece is arranged on the top of the valve cover. One end of the spring is connected to the regulating rod, and the other end is connected to the pressure regulating piece.

7. The gas regulator according to claim 6, characterized in that: The adjustment assembly also includes a retaining ring, and a retaining ring is provided between the bottom of the adjustment cone and the adjustment rod.

8. The gas regulator according to any one of claims 1 to 7, characterized in that: The taper of the lower part of the valve body matches the taper of the adjusting cone.

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