Valve stem structure with improved positioning stability

Abstract

The utility model discloses a kind of valve stem structures of improving positioning stability, including valve body, valve stem, be provided with upper limit boss of valve stem, lower limit boss of valve stem on valve stem, be provided with mounting hole on valve body, upper end of mounting hole is provided with upper limit boss of valve body, lower end is provided with lower limit groove of valve body;Valve stem is connected by passing through mounting hole, lower limit boss of valve stem is matched in lower limit groove of valve body, both form abutting positioning, upper limit boss of valve stem end surface and upper limit boss of valve body form abutting positioning, while upper limit boss of valve stem and the matching positioning between both side surface of mounting hole are formed. The utility model forms upper and lower all aspects positioning between stem and valve body, and the stability of valve stem rotating positioning is high, and it is not easy to appear the phenomenon of force biasing biasing wear, effectively avoid the situation that valve stem rotates to appear to shake occurs in later period, guarantee normal use, prolong service life, processing is simple, assembly operation is also very simple and convenient, improve production efficiency.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, concretely relates to a valve stem structure of improving positioning stability. BACKGROUND

[0002] Valve is mainly used on the conveying pipeline to play the role of medium cut-off, distribution and changing the medium flow direction, and is widely used in water supply, heating and other industries and civil pipeline. In the process of use, the ball valve core is rotated by corresponding valve stem, and the valve stem and the valve body are usually provided with a limiting structure to realize normal rotation operation. The existing structure is divided into two kinds, one is to install external pressure cap and other components on the valve body to limit the valve stem, and the other is to provide a limiting piece on the valve stem to abut against the valve body. The existing two ways have the same defects: it is troublesome to install the limiting piece, the error is large, and the limited position is single. In the later use process, it is easy to appear eccentric wear due to force rotation, and then the valve stem shakes, affects normal use, and the existing structure assembly operation is troublesome and the production efficiency is low. Therefore, it is necessary to improve the defects in the prior art. SUMMARY

[0003] The utility model discloses a valve stem structure of improving positioning stability to solve the problems in the background art.

[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: a valve stem structure of improving positioning stability, comprising a valve body and a valve stem, a valve stem upper limiting boss and a valve stem lower limiting boss are arranged on the valve stem, an installation hole is arranged on the valve body, a valve body upper limiting boss is arranged on the upper end of the installation hole, and a valve body lower limiting groove is arranged on the lower end of the installation hole; the valve stem passes through the installation hole and is connected, the valve stem lower limiting boss is matched in the valve body lower limiting groove, the upper end surface of the valve stem lower limiting boss abuts against the bottom side of the valve body lower limiting groove to form positioning, the end surface of the valve stem upper limiting boss abuts against the valve body upper limiting boss to form positioning, and matching positioning is formed between the two side surfaces of the valve stem upper limiting boss and the installation hole.

[0005] In the valve stem structure of improving positioning stability, a plurality of sealing grooves are arranged between the valve stem upper limiting boss and the valve stem lower limiting boss, and a sealing ring is arranged in the sealing groove.

[0006] In the valve stem structure of improving positioning stability, the valve stem further comprises an auxiliary positioning rod part, an auxiliary positioning hole is formed in the valve body upper limiting boss, the auxiliary positioning rod part is inserted into the auxiliary positioning hole, and matching positioning is formed between the two side surfaces.

[0007] In the valve stem structure of improving positioning stability, the valve stem upper limiting boss, the valve stem lower limiting boss and the valve stem are an integral structure.

[0008] In the valve stem structure for improving positioning stability, the upper limiting boss of the valve body is in an integral structure with the valve body.

[0009] In the valve stem structure for improving positioning stability, a transition chamfer is arranged at the connection between the lower limiting groove of the valve body and the mounting hole.

[0010] In the valve stem structure for improving positioning stability, the valve stem further comprises a connecting mounting rod part.

[0011] The utility model has the following beneficial effects:

[0012] The utility model discloses a matching positioning structure is arranged on the upper and lower parts of the valve body and valve stem, and the upper and lower full aspect abutting positioning is formed between the valve stem and the valve body, the stability of the rotating positioning of the valve stem is high, the phenomenon of force biasing and eccentric wear is not prone to appearing, the situation of the valve stem shaking in the later period is effectively avoided, normal use is ensured, the service life is prolonged, the positioning structure matched on the valve stem and the valve body adopts an integral structure, processing is simple, and assembling operation is also very simple and convenient, and production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the sectional view of the utility model;

[0014] Fig. 2 It is the perspective view of the utility model;

[0015] Fig. 3 It is the perspective view of the tee joint in the utility model. DETAILED DESCRIPTION

[0016] The utility model is further described in connection with the drawings.

[0017] Please refer to Figs. 1 to 3 The utility model provides a valve stem structure for improving positioning stability, including valve body 1, valve stem 2, be provided with valve stem upper limiting boss 3, valve stem lower limiting boss 4 on valve stem 2, preferably, valve stem upper limiting boss 3, valve stem lower limiting boss 4 and valve stem 2 are integral structure, be provided with mounting hole 5 on valve body 1, the upper end of mounting hole 5 is provided with valve body upper limiting boss 6, and the lower end is provided with valve body lower limiting groove 7, and valve body upper limiting boss 6 and valve body 1 are integral structure, and the integral structure design of valve body and valve stem is convenient for processing production, assembly, valve stem 2 still includes connecting mounting rod part 12, is used for installing connection rotating part, for example handle, hand wheel etc.

[0018] When installing, the valve stem 2 is connected through the installation hole 5, the valve stem lower limiting boss 4 is matched in the valve body lower limiting groove 7, and the upper end surface of the valve stem lower limiting boss 4 is in abutting positioning with the bottom side of the valve body lower limiting groove 7; the valve stem upper limiting boss 3 end surface is in abutting positioning with the valve body upper limiting boss 6, and the valve stem upper limiting boss 3 is matched and positioned between the two side surfaces of the installation hole 5. The valve stem and the valve body are positioned in all aspects, the stability of the rotational positioning of the valve stem is high, the phenomenon of force deviation and eccentric wear is not prone to occur, the situation of the valve stem shaking in the later period is effectively avoided, normal use is ensured, and the service life is prolonged.

[0019] Further, the transition chamfer 15 is arranged at the connection between the valve body lower limiting groove 7 and the installation hole 5, so that the installation and connection of the valve stem are facilitated.

[0020] Further, in order to ensure the sealing performance of the installation and connection, a plurality of sealing grooves 8 are arranged between the valve stem upper limiting boss 3 and the valve stem lower limiting boss 4, and a sealing ring 9 is arranged in the sealing groove 8.

[0021] Further, the valve stem further comprises an auxiliary positioning rod part 10, an auxiliary positioning hole 11 is formed in the valve body upper limiting boss 6, the auxiliary positioning rod part 10 is inserted into the auxiliary positioning hole 11, and the two are matched and positioned between the side surfaces. Therefore, the stability of the connection and positioning between the valve stem and the valve body is further improved.

[0022] The valve stem structure for improving the positioning stability is described in detail, the principle and implementation mode of the utility model are described by applying specific examples, the description of the above embodiments is only used for helping to understand the technical scheme disclosed by the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the utility model, and the content of the description should not be understood as the limitation of the utility model.

Claims

1. A valve stem structure for improving positioning stability, comprising a valve body (1), a valve stem (2), characterized in that: The valve stem (2) is provided with an upper valve stem limiting boss (3) and a lower valve stem limiting boss (4), the valve body (1) is provided with a mounting hole (5), the upper end of the mounting hole (5) is provided with an upper valve body limiting boss (6), and the lower end is provided with a lower valve body limiting groove (7); the valve stem (2) is connected by penetrating the mounting hole (5), the lower valve stem limiting boss (4) is matched in the lower valve body limiting groove (7), and the upper end surface of the lower valve stem limiting boss (4) is in abutting positioning with the bottom side of the lower valve body limiting groove (7); the end surface of the upper valve stem limiting boss (3) is in abutting positioning with the upper valve body limiting boss (6), and meanwhile, the upper valve stem limiting boss (3) and the mounting hole (5) are in matching positioning between the two side surfaces.

2. The valve stem structure of claim 1, wherein: A plurality of sealing grooves (8) are arranged between the upper valve stem limiting boss (3) and the lower valve stem limiting boss (4), and a sealing ring (9) is arranged in the sealing groove (8).

3. The valve stem structure of claim 1, wherein: The valve stem further comprises an auxiliary positioning rod part (10), an auxiliary positioning hole (11) is formed in the upper valve body limiting boss (6), the auxiliary positioning rod part (10) is penetrated in the auxiliary positioning hole (11), and the two side surfaces are in matching positioning.

4. The valve stem structure for improving positioning stability according to claim 1 or 2, characterized by: The upper valve stem limiting boss (3), the lower valve stem limiting boss (4) and the valve stem (2) are in an integral structure.

5. The valve stem structure of claim 1 or 3, wherein: The upper valve body limiting boss (6) and the valve body (1) are in an integral structure.

6. The valve stem structure of claim 1, wherein: A transition chamfer (15) is arranged at the connection between the lower valve body limiting groove (7) and the mounting hole (5).

7. The valve stem structure of claim 1 or 3, wherein: The valve stem (2) further comprises a connecting mounting rod part (12).

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