Connecting structure of valve core and valve rod

Abstract

According to the connecting structure of the valve element and the valve rod, the valve element connecting part on the valve rod extends into the valve rod connecting groove in the valve element to be riveted and fixed with the valve element, compared with a welding fixing mode in the prior art, the production efficiency can be improved, the manufacturing cost can be reduced, a heat affected area possibly generated in the welding process can be effectively avoided, and the service life of the valve element is prolonged. Therefore, the overall performance of the connecting structure of the valve element and the valve rod is guaranteed. In addition, convenience and stability in use are fully considered in the design of the connecting structure, the groove wall of the upper portion of the valve rod connecting groove is designed to be a limiting riveting part bent towards the center direction of the valve element, and through the design, the valve rod and the valve element are connected more tightly, and the strength of the connecting structure is improved. Meanwhile, the limiting part arranged on the valve element connecting part is matched with the limiting riveting part, and when the valve rod and the valve element are riveted, the limiting part is pressed by the limiting riveting part, so that the position between the valve rod and the valve element is accurately fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a connection structure between a valve core and a valve stem. Background Art

[0002] In the prior art, the valve core and the valve stem are connected by a retaining ring, and the retaining ring groove needs to be machined when the valve disc is processed. The processing and assembly are simple and time-saving. However, when the retaining ring is used, the valve disc needs to withstand the impact force, and the retaining ring may break under the impact force. If the retaining ring breaks and falls out, the connection between the valve disc and the valve stem will fail. Summary of the invention

[0003] In view of this, the utility model provides a connection structure between a valve core and a valve stem.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A connection structure between a valve core and a valve stem, comprising a valve core and a valve stem, wherein the center of the top of the valve core is concave to form a valve stem connecting groove, and the valve stem has a valve core connecting portion, and the valve core connecting portion extends into the valve stem connecting groove to be connected to the valve core, and the upper groove wall of the valve stem connecting groove is bent toward the center of the valve core to form a limiting riveted portion, and the valve core connecting portion has a limiting portion corresponding to the limiting riveted portion, and the limiting riveted portion fixes the position between the valve stem and the valve core by pressing the limiting portion.

[0006] Preferably, the valve stem is composed of a first rod body, a second rod body and a third rod body in sequence from top to bottom, the valve core connecting part is arranged at the bottom of the third rod body, the limiting rivet part extends between the second rod body and the third rod body to limit the valve core connecting part, the limiting part is a disc-shaped structure arranged on the valve core connecting part, the bottom end of the valve core connecting part is a conical structure, and the valve stem connecting groove has a shape setting corresponding to the valve core connecting part.

[0007] Preferably, the valve stem connecting groove has a rod body connecting portion, a limiting portion and a tapered portion, and the rod body connecting portion, the limiting portion and the tapered portion respectively correspond to the tapered structures of the bottom end of the third rod body, the limiting portion and the valve core connecting portion.

[0008] Preferably, the first rod body, the second rod body and the third rod body are an integrally formed structure, and the second rod body is provided with an external thread.

[0009] Preferably, a frustum limiting portion is provided on the second rod body, a riveting distance is formed between the frustum limiting portion and the valve core connecting portion, the limiting riveting portion extends into the riveting distance to limit the valve core connecting portion, and an external thread is provided on the first rod body.

[0010] Preferably, the frustum limiting portion includes a cone portion and a cylindrical portion, the cylindrical portion is arranged below the cone portion, and the bottom end of the cylindrical portion is connected to the top of the limiting riveted portion.

[0011] The beneficial effect of the utility model is that the valve core connection part on the valve stem extends into the valve stem connection groove on the valve core and is riveted and fixed to the valve core. Compared with the welding fixation form in the prior art, it can not only improve production efficiency and reduce manufacturing costs, but also effectively avoid the heat-affected zone that may be generated during the welding process, thereby ensuring the overall performance of the valve core and valve stem connection structure. In addition, the design of the connection structure also fully considers the convenience and stability of use. The upper groove wall of the valve stem connection groove is designed as a limit riveting part bent toward the center of the valve core. This design not only makes the connection between the valve stem and the valve core tighter, but also increases the strength of the connection structure. At the same time, the limit part set on the valve core connection part matches the limit riveting part. When the valve stem and the valve core are riveted, the limit part is pressed by the limit riveting part, thereby realizing the precise fixation of the position between the valve stem and the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Attached Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Attached Figure 2 For attachment Figure 1 Enlarged view of point A

[0015] Attached Figure 3 It is a schematic diagram of the structure of another embodiment. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0017] The utility model will be further described below in conjunction with the accompanying drawings of the specification.

[0018] The utility model provides the following technical solutions:

[0019] As attached Figure 1-3 As shown, the utility model discloses a connection structure between a valve core 1 and a valve stem 2, comprising a valve core 1 and a valve stem 2, wherein the center of the top of the valve core 1 is concave to form a valve stem connection groove 3, and the valve stem 2 has a valve core connection portion 4, wherein the valve core connection portion 4 extends into the valve stem connection groove 3 and is connected to the valve core 1, and the upper groove wall of the valve stem connection groove 3 is bent toward the center of the valve core 1 to form a limiting riveted portion 5, and the valve core connection portion 4 has a limiting portion 6 corresponding to the limiting riveted portion 5, and the limiting riveted portion 5 fixes the position between the valve stem 2 and the valve core 1 by pressing the limiting portion 6. Specifically, in this design, the valve core connection portion 4 on the valve stem 2 extends into the valve stem connection groove 3 on the valve core 1 and is fixed by riveting to the valve core 1. Compared with the welding fixation form in the prior art, it can not only improve production efficiency and reduce manufacturing costs, but also effectively avoid the heat-affected zone that may be generated during welding, thereby ensuring the overall performance of the connection structure between the valve core 1 and the valve stem 2. In addition, the design of the connection structure also fully considers the convenience and stability of use. The upper groove wall of the valve stem connection groove 3 is designed as a limit riveting part 5 bent toward the center direction of the valve core 1. This design not only makes the connection between the valve stem 2 and the valve core 1 tighter, but also increases the strength of the connection structure. At the same time, the limit part 6 set on the valve core connection part 4 matches the limit riveting part 5. When the valve stem 2 and the valve core 1 are riveted, the limit part 6 is pressed by the limit riveting part 5, thereby realizing the precise fixation of the position between the valve stem 2 and the valve core 1.

[0020] Further, the valve stem 2 is composed of a first rod body 7, a second rod body 8 and a third rod body 9 from top to bottom, the valve core connection part 4 is arranged at the bottom of the third rod body 9, the limiting riveted part 5 extends between the second rod body 8 and the third rod body 9 to limit the valve core connection part 4, the limiting part 6 is arranged on the valve core connection part 4 in a disc-shaped structure, the bottom end of the valve core connection part 4 is arranged in a conical structure, and the valve stem connection groove 3 has a shape corresponding to the valve core connection part 4. Specifically, in this embodiment, by dividing the valve stem 2 into three parts, namely, the first rod body 7, the second rod body 8 and the third rod body 9, the structure of the entire valve stem 2 is more reasonable and can meet the needs of different usage scenarios. Among them, the valve core connection part 4 is arranged at the bottom of the third rod body 9. Such a design makes the connection between the valve core 1 and the valve stem 2 more convenient, and can also ensure the stability of the connection; the limiting riveting part 5 extends between the second rod body 8 and the third rod body 9 to limit the valve core connection part 4 through the bottom of the second rod body 8. Such a design makes the connection between the valve core 1 and the valve stem 2 more secure, and can effectively prevent loosening or falling off during use. At the same time, the limiting part 6 is arranged on the valve core connection part 4 in a disc-shaped structure. Such a design is not only convenient for cooperation with the limiting riveting part 5, but also can increase the stability of the connection structure. The bottom end of the valve core connection part 4 is arranged in a conical structure. Such a design can facilitate the valve core connection part 4 to extend into the valve stem connection groove 3, thereby improving the convenience of assembly. At the same time, the valve stem connection groove 3 has a shape setting corresponding to the valve core connection part 4. Such a design can ensure the close cooperation between the valve core connection part 4 and the valve stem connection groove 3, thereby improving the sealing and stability of the connection structure.

[0021] Further, the valve stem connection groove 3 has a rod body connection part 10, a limit connection part 12 and a tapered part 11, and the rod body connection part 10, the limit connection part 12 and the tapered part 11 correspond to the tapered structure of the bottom end of the third rod body 9, the limit connection part 12 and the valve core connection part 4, respectively. Specifically, in this embodiment, the rod body connection part 10, the limit connection part 12 and the tapered part 11 correspond to the tapered structure of the bottom end of the third rod body 9, the limit connection part 12 and the valve core connection part 4 on the valve stem 2, respectively. Such a design enables the valve stem 2 to be firmly inserted into the valve core 1, providing a solid foundation for the entire connection structure. The design of the limit connection part 12 can ensure that the valve stem 2 will not deviate from the predetermined position during the insertion process, thereby ensuring the accuracy of the connection structure. The setting of the tapered part 11 further increases the contact area between the valve core connection part 4 and the valve stem connection groove 3, and improves the stability and sealing of the connection.

[0022] Furthermore, the first rod body 7 , the second rod body 8 and the third rod body 9 are an integrally formed structure, and the second rod body 8 is provided with an external thread.

[0023] Reference Figure 3As shown, in another embodiment, further, a frustum limiting portion 13 is provided on the second rod body 8, a riveting spacing 14 is formed between the frustum limiting portion 13 and the valve core connecting portion 4, the limiting riveting portion 5 extends into the riveting spacing 14 to limit the valve core connecting portion 4, and an external thread is provided on the first rod body 7. Specifically, in this embodiment, by forming a riveting spacing 14 between the frustum portion and the valve core connecting portion 4, the valve stem 2 can be riveted to valve cores 1 of different heights, thereby improving the versatility of the connection structure between the valve stem 2 and the valve core 1. At the same time, the setting of the frustum limiting portion 13 can also limit the limiting riveting portion 5 to prevent it from shifting during the riveting process, thereby ensuring the accuracy and stability of the riveting.

[0024] Furthermore, the frustum limiting portion 13 includes a cone portion 15 and a cylindrical portion 16 , wherein the cylindrical portion 16 is disposed below the cone portion 15 , and the bottom end of the cylindrical portion 16 is connected to the top of the limiting riveted portion 5 .

[0025] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connection structure between a valve core and a valve stem, comprising a valve core and a valve stem, characterized in that: The center of the top of the valve core is concave to form a valve stem connecting groove, and the valve stem has a valve core connecting part, and the valve core connecting part extends into the valve stem connecting groove and is connected to the valve core. The upper groove wall of the valve stem connecting groove is bent toward the center of the valve core to form a limiting riveted part, and the valve core connecting part has a limiting part corresponding to the limiting riveted part, and the limiting riveted part fixes the position between the valve stem and the valve core by pressing the limiting part.

2. The connection structure between the valve core and the valve stem according to claim 1, characterized in that: The valve stem is composed of a first rod body, a second rod body and a third rod body in sequence from top to bottom, the valve core connecting part is arranged at the bottom of the third rod body, the limiting rivet part extends between the second rod body and the third rod body to limit the valve core connecting part, the limiting part is a disc-shaped structure arranged on the valve core connecting part, the bottom end of the valve core connecting part is a conical structure, and the valve stem connecting groove has a shape setting corresponding to the valve core connecting part.

3. The connection structure between the valve core and the valve stem according to claim 2, characterized in that: The valve stem connecting groove has a rod body connecting portion, a limiting portion and a tapered portion, and the rod body connecting portion, the limiting portion and the tapered portion correspond to the tapered structures of the bottom ends of the third rod body, the limiting portion and the valve core connecting portion respectively.

4. The connection structure between the valve core and the valve stem according to claim 2, characterized in that: The first rod body, the second rod body and the third rod body are an integrally formed structure, and the second rod body is provided with an external thread.

5. The connection structure between the valve core and the valve stem according to claim 2, characterized in that: The second rod body is provided with a frustum limiting portion, a riveting distance is formed between the frustum limiting portion and the valve core connecting portion, the limiting riveting portion extends into the riveting distance to limit the valve core connecting portion, and the first rod body is provided with an external thread.

6. The connection structure between the valve core and the valve stem according to claim 5, characterized in that: The frustum limiting portion comprises a cone portion and a cylindrical portion, wherein the cylindrical portion is arranged below the cone portion, and the bottom end of the cylindrical portion is connected to the top of the limiting riveted portion.

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