CN217422344U - Gas proportional valve - Google Patents

Abstract

The utility model relates to a gas proportional valve, including valve body and valve gap that the components of a whole that can function independently shaping each other and each other lid closed, still include the diaphragm, the diaphragm is located between the valve body and the valve gap, and with form the back pressure room between the valve gap, the valve gap is the integrated into one piece structure, the valve gap has seted up the breathing hole, the valve gap has the connecting pipe, the connecting pipe has the connecting hole, the back pressure room, the breathing hole, the connecting hole communicates in proper order, the connecting hole is used for communicating the back pressure pipe; it has solved the gas tightness problem that the back pressure pipe appears effectively to prevent gas leakage phenomenon.

Description

Gas proportional valve

Technical Field

The utility model relates to proportional valve technical field especially relates to gas proportional valve.

Background

The moving iron core gas proportional valve is a common core component of a strong drum type gas water heater. A diaphragm back pressure chamber is formed between the diaphragm and the valve cover, and the main component of gas in the diaphragm back pressure chamber is air. The valve cover is provided with a breathing hole for smooth action of the diaphragm, and the size of the breathing hole is restricted by national standards for preventing gas leakage when the diaphragm is broken.

At present, most of breathing holes of the existing moving iron core gas proportional valve are directly connected with the atmosphere. In contrast, the patent document CN201821480279.8 discloses an improved connection structure of a back pressure pipe for a fuel gas proportional valve, which is to communicate a diaphragm back pressure chamber and a combustion chamber through the back pressure pipe. It is inserted that the gas flows to the valve assembly → the valve assembly (the gas pressure drops when the gas passes through the valve assembly) → the gas distributing rod → the combustion chamber, and the positive pressure of the relatively sealed combustion chamber partially offsets the gas pressure from the gas distributing rod. Therefore, through back pressure pipe intercommunication diaphragm back pressure room and combustion chamber, the benefit of improvement like this lies in, utilizes the malleation of combustion chamber to give the back pressure room pressure boost, and along with the transmission of atmospheric pressure, the diaphragm pressure boost is given to the back pressure room, and like this, the valve assembly in the valve body just gives outside branch gas pole pressure boost for when the gas of branch gas pole sent into the combustion chamber, reach ideal atmospheric pressure (realized the pressure boost promptly). The ultimate goal is to reduce the deviation of the maximum thermal load.

However, the patent document CN201821480279.8 discloses a back pressure pipe connection structure for a fuel gas proportional valve, which is prone to air leakage due to air tightness problems at each connection of the back pressure pipe.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be to provide the gas proportional valve, its gas tightness problem of having solved the back pressure pipe effectively and appearing to prevent gas leakage phenomenon.

The technical problem is solved by the following technical scheme:

gas proportional valve, including the valve body and the valve gap that each other components of a whole that can function independently shaping and each other lid closed, still include the diaphragm, the diaphragm is located the valve body with between the valve gap, and with form the back pressure room between the valve gap, the valve gap is the integrated into one piece structure, the breathing hole has been seted up to the valve gap, the valve gap has the connecting pipe, the connecting pipe has the connecting hole, the back pressure room the breathing hole the connecting hole communicates according to the preface, the connecting hole is used for communicateing the back pressure pipe.

Compared with the prior art, the gas proportional valve has the beneficial effects that: through setting up the valve gap into the integrated into one piece structure, be about to the connecting pipe and set up to the partly of valve gap to it need not to set up seal structure to make between the main part of valve gap and the connecting pipe, thereby further avoids the probability that gas leakage phenomenon takes place. Especially, the combustion chamber needs for the back pressure chamber pressure boost to can improve the possibility of gas leakage, and the utility model discloses in, the key leakproofness that keeps between valve gap and the valve body is good, and the key leakproofness that keeps between connecting pipe and the back pressure pipe good can, thereby reduced the degree of difficulty that keeps the gas tightness.

In one embodiment, the connecting tube extends in a radial direction of the valve cover.

In one embodiment, the gas proportional valve further comprises a proportional adjusting assembly, the proportional adjusting assembly is connected to the valve cover, a yielding groove extending along the radial direction of the valve cover is formed in one side, close to the valve cover, of the proportional adjusting assembly, and the connecting pipe is accommodated in the yielding groove.

In one embodiment, an end portion, far away from the breathing hole, of the connecting pipe is provided with an arc surface formed by expanding along a radial direction of the connecting pipe, the diameter of the arc surface is gradually increased along an axial direction of the connecting pipe, and the diameter of a near end, close to the breathing hole, of the arc surface is larger than the diameter of a far end, far away from the breathing hole, of the arc surface.

In one embodiment, the inner bottom wall of the valve cover is recessed downwards to form a concave hole, the top end of the breathing hole penetrates through the concave hole, and the bottom end of the breathing hole penetrates through the connecting hole.

In one embodiment, the valve cover is made of an aluminum alloy material.

Drawings

Fig. 1 is a schematic structural view of the gas proportional valve of the present invention;

fig. 2 is an exploded view of fig. 1.

Description of reference numerals: 10. a valve body; 20. a valve cover; 201. a breathing hole; 202. a connecting pipe; 2021. connecting holes; 2022. a circular arc surface; 203. concave holes; 30. a diaphragm; 40. a back pressure chamber; 50. a ratio adjustment assembly; 501. a yielding groove; 502. a coil assembly; 503. an iron core; 504. a spring; 505. adjusting the nut; 506. and a guide nut.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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 the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

Referring to fig. 1, the utility model discloses a gas proportional valve includes: the valve body 10 and the valve cover 20 are formed separately from each other and are covered with each other; a diaphragm 30 is further included, and the diaphragm 30 is located between the valve body 10 and the bonnet 20 and forms a back pressure chamber 40 with the bonnet 20. Importantly, the valve cover 20 is of an integrally formed structure, and the valve cover 20 is provided with a breathing hole 201; and the valve cover 20 has a connection pipe 202, the connection pipe 202 has a connection hole 2021, the back pressure chamber 40, the breathing hole 201, and the connection hole 2021 are sequentially communicated, and the connection hole 2021 is used for communicating the back pressure pipe. It is noted that the purpose of the back-pressure pipe is to be connected to the combustion chamber, and it is thus named back-pressure pipe in the art. Thus, the back pressure chamber 40, the breathing hole 201, the connection hole 2021, and the combustion chamber are close to each other in air pressure.

In operation, referring to fig. 1, one end of the back pressure pipe is connected to the connection hole 2021, and the other end of the back pressure pipe is connected to the combustion chamber, so that the pressure of the back pressure chamber 40 is increased to be close to the combustion chamber, and the back pressure chamber 40 pressurizes the inside of the valve body 10 through the diaphragm 30, so that the pressure of the gas entering the combustion chamber from the inside of the valve body 10 is increased to an ideal value (i.e., the gas is prevented from being reduced along the way to cause the pressure to be lower than the ideal value when the gas reaches the combustion chamber).

It is important to see fig. 1, in the present invention, the connecting pipe 202 is disposed as a part of the valve cover 20 by disposing the valve cover 20 as an integrally formed structure, so that a sealing structure is not required to be disposed between the main body of the valve cover 20 and the connecting pipe 202, thereby further avoiding the occurrence of the air leakage phenomenon. In particular, the combustion chamber needs to be pressurized for the back pressure chamber 40, so that the possibility of air leakage can be improved, and the utility model discloses in, it is important to keep the leakproofness between the valve cover 20 and the valve body 10 good, and it is important to keep the leakproofness between the connecting pipe 202 and the back pressure pipe good, so that the difficulty of keeping the airtightness is reduced.

In one embodiment, referring to fig. 1, the connection tube 202 extends in a radial direction of the valve cover 20. So set up, be favorable to reducing the axial dimension of gas proportional valve, and make the back pressure pipe change in pegging graft with connecting pipe 202.

In one embodiment, referring to fig. 2, the gas proportional valve further includes a proportional adjusting assembly 50, the proportional adjusting assembly 50 is connected to the valve cover 20, a yielding groove 501 extending along the radial direction of the valve cover 20 is formed on one side of the proportional adjusting assembly 50 close to the valve cover 20, and the connecting pipe 202 is accommodated in the yielding groove 501. The connection pipe 202 is abdicated through the abdicating groove 501, so that the structure of the gas proportional valve is more compact. It should be noted that the internal structure of the proportional adjusting assembly 50 is relatively mature, and referring to fig. 1, the proportional adjusting assembly 50 mainly includes a coil assembly 502, an iron core 503, a spring 504, an adjusting nut 505, and a guiding nut 506.

In one embodiment, referring to fig. 2, the end of the connection tube 202 away from the breathing hole 201 has an arc surface 2022 formed by expanding in a radial direction of the connection tube 202, a diameter of the arc surface 2022 gradually increases in an axial direction of the connection tube 202, and a diameter of the arc surface 2022 near a proximal end of the breathing hole 201 is larger than a diameter of the arc surface 2022 at a distal end of the breathing hole 201 away from the distal end. Obviously, the arc surface 2022 is easier for the back pressure pipe to be sleeved outside the connection pipe 202, and is formed by expanding the arc surface 2022 along the radial direction of the connection pipe 202, and the back pressure pipe is not easy to fall off after being inserted outside the connection pipe 202.

In one embodiment, referring to fig. 1, the inner bottom wall of the valve cap 20 is recessed downward to form a recessed hole 203, the top end of the breathing hole 201 penetrates through the recessed hole 203, and the bottom end of the breathing hole 201 penetrates through the connecting hole 2021. With this arrangement, the length of the breathing hole 201 can be reduced by the provision of the recessed hole 203, so that the backpressure chamber 40 and the combustion chamber pressure can be brought closer to each other. Meanwhile, the concave hole 203 can prevent the diaphragm 30 from attaching to and blocking the breathing hole 201 due to unexpected phenomena.

In one embodiment, the valve cover 20 is made of an aluminum alloy material, so that the valve cover 20 is integrally formed in a punching mode, and the manufacturing difficulty is reduced.

In the detailed description of the above embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the above technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The details of the foregoing embodiments are merely representative of several embodiments of the present invention, which are described in more detail and detail, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (6)

1. Gas proportional valve, including valve body (10) and valve gap (20) that the components of a whole that can function independently shaping and each other lid closed, still include diaphragm (30), diaphragm (30) are located valve body (10) with between valve gap (20), and with form back pressure chamber (40), its characterized in that between valve gap (20): valve gap (20) are the integrated into one piece structure, breathing hole (201) have been seted up in valve gap (20), valve gap (20) have connecting pipe (202), connecting pipe (202) have connecting hole (2021), back pressure room (40) breathing hole (201) connecting hole (2021) communicate in proper order, connecting hole (2021) are used for communicateing the back pressure pipe.

2. The gas proportioning valve of claim 1 wherein: the connection pipe (202) extends in a radial direction of the valve cover (20).

3. The gas proportioning valve of claim 1 wherein: the gas proportional valve still includes proportion regulation subassembly (50), proportion regulation subassembly (50) connect in valve gap (20), be close to on proportion regulation subassembly (50) the edge is seted up to one side of valve gap (20) radially extended groove of stepping down (501), connecting pipe (202) holding is in the groove of stepping down (501).

4. The gas proportioning valve of claim 1 wherein: the end part of the connecting pipe (202) far away from the breathing hole (201) is provided with an arc surface (2022) formed by radial expansion along the connecting pipe, the diameter of the arc surface (2022) is gradually increased along the axial direction of the connecting pipe (202), and the diameter of the near end of the arc surface (2022) close to the breathing hole (201) is larger than the diameter of the far end of the arc surface (2022) far away from the breathing hole (201).

5. The gas proportioning valve of claim 1 wherein: the inboard diapire of valve gap (20) is sunken and is formed shrinkage pool (203) downwards, the top of breathing hole (201) run through to shrinkage pool (203), the bottom of breathing hole (201) runs through to connecting hole (2021).

6. The gas proportioning valve of claim 1 wherein: the valve cover (20) is made of an aluminum alloy material.

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