Transformer butterfly valve

Abstract

The utility model relates to the field of butterfly valves, and discloses a transformer butterfly valve which comprises a valve body used for fixing and containing valve parts. One end of the valve rod is installed in the valve body in a penetrating mode, and the other end of the valve rod extends out of the valve body and is used for controlling opening and closing of the valve body. The plurality of sealing grooves are distributed on the surface of the valve rod in a linear array; the multiple sealing pieces are installed in the valve body, matched with the multiple sealing grooves and used for sealing the connecting position of the valve rod and the valve body. According to the utility model, by increasing the number of the sealing grooves and adopting the elastic contact between the connecting piece and the sealing piece, the sealing effect at the joint of the valve rod and the valve body is obviously improved, the fluid leakage phenomenon is effectively prevented, and particularly, good sealing performance can still be kept in a low-temperature environment.

Description

Technical Field

[0001] The utility model relates to the field of butterfly valves, in particular to a transformer butterfly valve. Background Art

[0002] The design life of transformer valves is more than 10 years. The rationality of their structure directly affects the service life of the valve, and also affects the operation and maintenance costs of high-speed railways as well as the overhaul cycle and cost.

[0003] The transformer butterfly valve currently in use will experience oil leakage at the joint between the valve stem and the valve body after being opened and closed hundreds of times or more during operation. This directly increases the maintenance cost of the transformer butterfly valve (increased costs, shorter cycles), and even affects the normal operation of high-speed railways.

[0004] At present, the oil leakage at the joint between the valve stem and the valve body of the transformer butterfly valve is mainly caused by the poor cooperation between the sealing groove and the sealing ring on the valve stem. Especially when the ambient temperature drops, the cooperation between the sealing ring and the sealing groove is worse, and the insufficient number of sealing grooves is also one of the reasons. Utility Model Content

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A transformer butterfly valve, comprising:

[0007] Valve body, used to fix and accommodate valve components;

[0008] A valve stem, one end of which is installed in the valve body and the other end of which extends to the outside of the valve body;

[0009] A plurality of sealing grooves are distributed on the surface of the valve stem in a linear array;

[0010] A plurality of sealing members are installed in the valve body and matched with the plurality of sealing grooves for sealing the connection between the valve stem and the valve body;

[0011] A plurality of connecting members are respectively installed in the sealing grooves and form moving contact with the sealing members to maintain the position of the sealing members in the sealing grooves.

[0012] Also includes:

[0013] The valve plate is installed inside the valve body and is used to control the opening and closing of the valve body.

[0014] An auxiliary groove is provided on the inner wall of the sealing groove, and the connecting piece is installed in the auxiliary groove.

[0015] The connecting piece comprises:

[0016] The elastic member is installed in the auxiliary groove in a circular shape and is used to provide contact between the connecting member and the sealing member.

[0017] Also includes:

[0018] A positioning block is installed on the valve body, and one end of the valve stem passes through the positioning block, so as to determine the motion trajectory and position of the valve stem;

[0019] An indicator needle is installed on the valve stem and is used to indicate the opening and closing status of the valve plate.

[0020] The utility model provides a transformer butterfly valve, which has the following beneficial effects compared with the prior art:

[0021] 1. By increasing the number of sealing grooves and using elastic contact between connectors and seals, the sealing effect of the joint between the valve stem and the valve body is significantly improved, effectively preventing fluid leakage, and maintaining good sealing performance, especially in low temperature environments.

[0022] 2. The positioning block ensures the stability of the valve stem movement trajectory, reduces the risk of seal failure caused by valve stem deviation or shaking, and improves the stability and reliability of the entire sealing structure. The indicator needle can intuitively indicate the opening and closing status of the valve plate, providing convenience for the operator's operation and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the cross-sectional structure proposed by the utility model.

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure proposed by the utility model.

[0025] Figure 3 This is a structural schematic diagram of the valve stem proposed by the utility model.

[0026] Figure 4 This is a schematic diagram of the connection between the valve stem and the sealing member proposed in the utility model.

[0027] Figure 5 This is a schematic diagram of the exploded structure of the valve stem and the sealing member proposed in the utility model.

[0028] Figure 6 It is a partial cross-sectional structural schematic diagram of the valve stem, sealing member, connecting member and elastic member proposed in the utility model.

[0029] Figure 7 This is a structural schematic diagram of the connecting piece and the elastic piece proposed by the utility model.

[0030] The reference numerals in the figure are:

[0031] 1. Valve body; 2. Valve plate; 3. Valve stem; 301. Sealing groove; 302. Auxiliary groove; 303. Connecting piece; 304. Elastic piece; 4. Positioning block; 5. Indicator needle; 6. Sealing piece. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1-Figure 7 , a transformer butterfly valve, comprising:

[0034] The valve body 1 is used to fix and accommodate valve components; the valve plate 2 is installed inside the valve body 1 and is used to control the opening and closing of the valve body 1; the valve stem 3 has one end that penetrates and is installed inside the valve body 1, and the other end that extends to the outside of the valve body 1 and is used to control the opening and closing of the valve body 1; a plurality of sealing grooves 301 are distributed on the surface of the valve stem 3 in a linear array; the valve stem 3 can facilitate the operator to open and close the valve, and the plurality of sealing grooves 301 on the surface of the valve stem 3 not only increase the contact area with the sealing member 6 and improve the sealing effect, but also provide convenience for the installation of the connector 303. The plurality of sealing members 6 are installed in the valve body 1 and matched with the plurality of sealing grooves 301 and are used for sealing the connection between the valve stem 3 and the valve body 1. The sealing grooves 301 are distributed on the surface of the valve stem 3 in a linear array, and each sealing groove 301 matches with a sealing member 6. The seal 6 adopts a rubber seal ring or a silicone seal ring, which has good sealing and wear resistance. When the valve stem 3 moves, the seal 6 can move freely in the sealing groove 301, forming a tight sealing structure with the valve body 1, and effectively preventing fluid leakage; multiple connectors 303 maintain the position of the seal 6 in the sealing groove 301. As a key component for maintaining the position of the seal 6 in the sealing groove 301, the connector 303 can form a stable contact with the seal 6. When the valve stem 3 moves, the elastic member 304 can provide sufficient elastic force to keep the connector 303 in close contact with the seal 6 at all times, thereby ensuring that the seal 6 and the valve stem 3 maintain a good sealing effect, especially when used in a low temperature environment, even if the seal 6 shrinks, the elastic force provided by the elastic member 304 can keep the connector 303 in close contact with the seal 6.

[0035] Increasing the number of sealing grooves 301 means increasing the contact points on the sealing interface, thereby improving the reliability of the seal. Multiple sealing grooves 301 can disperse stress and reduce the risk of failure of a single sealing point. Multiple sealing grooves 301 can also provide additional oil flow barriers to reduce the possibility of oil leakage from the joint between the valve stem 3 and the valve body 1.

[0036] Reference Figure 3 , Figure 5 and Figure 6 An auxiliary groove 302 is provided on the inner wall of the sealing groove 301, and the connecting member 303 is installed in the auxiliary groove 302. The connecting member 303 includes: an elastic member 304, which is installed in the auxiliary groove 302 in a circular shape, and is used to provide elastic contact between the connecting member 303 and the sealing member 6. The elastic member 304 adopts a rubber ring, and can also adopt a silicone ring, which has good resilience. The connecting member 303 adopts a rubber sealing ring, and can also adopt a silicone sealing ring. The connecting member 303 is a key component for maintaining the position of the sealing member 6 in the sealing groove 301, and can form a stable contact with the sealing member 6.

[0037] Reference Figure 1 and Figure 2 , a positioning block 4 is installed on the valve body 1, and one end of the valve stem 3 passes through the positioning block 4 to determine the movement trajectory and position of the valve stem 3; an indicator needle 5 is installed on the valve stem 3 to indicate the opening and closing status of the valve plate 2. The positioning block 4 ensures that the valve stem 3 always maintains a stable trajectory and position during the movement, ensures that it can firmly fix the valve stem 3 and prevent it from deflecting or shaking, and the indicator needle 5 is used to intuitively indicate the opening and closing status of the valve plate 2. The operator can judge the working status of the valve by observing the position of the indicator needle 5, and can operate and adjust it conveniently and quickly.

[0038] During use, the transformer butterfly valve mainly controls the opening and closing of the valve body 1 through the valve plate 2. The valve stem 3 serves as an operating mechanism, one end of which penetrates the valve body 1 and the other end extends to the outside of the valve body 1 for the operator to control the movement of the valve plate 2. The multiple sealing grooves 301 on the surface of the valve stem 3 match the multiple sealing members 6 in the valve body 1. When the valve stem 3 moves in the valve body 1, the sealing member 6 moves freely in the sealing groove 301 to form a tight sealing structure with the valve body 1, thereby effectively preventing fluid leakage. The connecting member 303 is installed in the auxiliary groove 302 of the sealing groove 301, and the elastic member 304 is provided to provide a connection with the sealing member 6. The contact between the valve stem 3 and the sealing groove 301 ensures that the sealing element 6 always maintains a good sealing effect during the movement of the valve stem 3. Especially in a low temperature environment, the elastic force provided by the elastic element 304 can make the connecting element 303 always fit the sealing element 6, compensate for the gap between the sealing element 6 and the sealing groove 301 due to shrinkage, and ensure that the sealing effect is not affected. The positioning block 4 ensures the stability of the movement trajectory and position of the valve stem 3, prevents the valve stem 3 from deflecting or shaking during the movement, thereby ensuring the stability of the sealing structure. The indicator needle 5 intuitively indicates the opening and closing status of the valve plate 2, which provides convenience for the operator's operation and adjustment.

[0039] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0040] By increasing the number of sealing grooves 301 and using the connector 303 to elastically contact the seal 6, the sealing effect of the joint between the valve stem 3 and the valve body 1 is significantly improved, effectively preventing fluid leakage, and maintaining good sealing performance, especially in a low temperature environment.

[0041] The positioning block 4 ensures the stability of the movement trajectory of the valve stem 3, reduces the risk of sealing failure caused by the deviation or shaking of the valve stem 3, and improves the stability and reliability of the entire sealing structure. The indicator needle 5 can intuitively indicate the opening and closing status of the valve plate 2, which provides convenience for the operator's operation and adjustment, and also facilitates daily maintenance and overhaul work.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A transformer butterfly valve, characterized in that: include: A valve body (1), used to fix and accommodate valve components; A valve stem (3), one end of which is installed through the valve body (1) and the other end of which extends to the outside of the valve body (1); A plurality of sealing grooves (301) distributed in a linear array on the surface of the valve stem (3); A plurality of sealing members (6) are installed in the valve body (1) and match the plurality of sealing grooves (301) and are used for sealing the connection between the valve stem (3) and the valve body (1); A plurality of connecting members (303) are respectively installed in the sealing grooves (301) and are in moving contact with the sealing member (6).

2. The transformer butterfly valve according to claim 1, characterized in that: Also includes: The valve plate (2) is installed inside the valve body (1) and is used to control the opening and closing of the valve body (1).

3. The transformer butterfly valve according to claim 1, characterized in that: An auxiliary groove (302) is provided on the inner wall of the sealing groove (301), and the connecting piece (303) is installed in the auxiliary groove (302).

4. The transformer butterfly valve according to claim 3, characterized in that: The connecting piece (303) comprises: The elastic member (304) is installed in the auxiliary groove (302) in a circular shape and is used to provide elastic contact between the connecting member (303) and the sealing member (6).

5. The transformer butterfly valve according to claim 2, characterized in that: Also includes: A positioning block (4) is mounted on the valve body (1), and one end of the valve stem (3) passes through the positioning block (4) to determine the movement trajectory and position of the valve stem (3); An indicator needle (5) is mounted on the valve stem (3) and is used to indicate the open and closed states of the valve plate (2).

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