Air valve structure

Abstract

The utility model discloses an air valve structure which comprises a valve seat, a valve plate is assembled on the top of the valve seat, a valve cover is assembled on the top of the valve plate, a spring hole is formed in the valve cover, a spring is assembled in the spring hole, and a positioning assembly is fixedly assembled on the top of a base. The spring is fixed in a physical mode, and bias pressure generated in the spring compression process can be limited to the maximum extent, so that the spring and the spring hole are protected, friction damage generated between the spring and the spring hole is avoided, the service life of the spring and the valve cover is prolonged, and the service life of the valve cover is prolonged. Meanwhile, the inner positioning assembly has two different positioning modes, the spring is positioned in a positioning groove mode, the machining process of the positioning groove is easier, and the lifting stroke of the spring in a spring hole is easier to control in a positioning protrusion mode. And the lift control of the spring is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of air valves, in particular to an air valve structure. Background Art

[0002] The gas valve is an important component used to control the gas inhalation and discharge from the cylinder in the compressor. The gas valve is usually composed of a valve seat, a valve core, and a valve cover that are fixed and assembled in sequence. The existing gas valve assembly and fixation are as follows: Figure 3 As shown in the figure, a spring hole for spring assembly is opened in the valve cover. There are two main types of springs used in the air valve structure, namely cylindrical springs and conical springs. Regardless of the type of spring, there will be a situation where the central axis does not move during the compression process, which we usually call bias. There are many reasons for this, including manufacturing reasons, poor verticality of the upper and lower surfaces to the central axis, etc. However, if this problem is not properly solved, it will cause friction between the spring and the spring hole wall, shortening the service life of the spring. To this end, we propose an air valve structure. Utility Model Content

[0003] The purpose of the utility model is to provide a gas valve structure to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an air valve structure, including a valve seat, a valve plate is installed on the top of the valve seat, a valve cover is installed on the top of the valve plate, a spring hole is opened in the valve cover, a spring is installed in the spring hole, and a positioning component is fixedly installed on the top of the valve seat.

[0005] Preferably, the spring hole is tapered.

[0006] Preferably, the positioning assembly comprises a positioning groove, the positioning groove is formed on a side wall of the valve plate, and the positioning groove corresponds to the position of the spring hole.

[0007] Preferably, the positioning assembly comprises a positioning protrusion, the positioning protrusion is fixedly connected to the side wall of the valve plate, and the positioning protrusion corresponds to the position of the spring hole.

[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows: A gas valve structure, compared with the traditional gas valve structure, a positioning component is added to the side wall of the valve disc. The spring is fixed physically, which can limit the bias pressure generated during the compression of the spring to the greatest extent, thereby protecting the spring and the spring hole, avoiding friction damage between the spring and the spring hole, extending the service life of the spring and the valve cover. At the same time, the positioning component in the present utility model has two different positioning methods. The advantage of using the positioning groove to position the spring is that the processing of the positioning groove is easier, while the advantage of using the positioning protrusion to position the spring is that it is easier to control the lifting stroke of the spring in the spring hole, and the lift control of the spring is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic structural diagram of the first embodiment of the present utility model.

[0010] Figure 2 It is a schematic structural diagram of the second embodiment of the present utility model.

[0011] Figure 3 It is a schematic structural diagram of a traditional gas valve.

[0012] In the figure: 1, valve seat; 2, valve disc; 3, valve cover; 4, spring hole; 5, spring; 6, positioning component; 61, positioning groove; 62, positioning protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0014] Embodiment 1

[0015] Please refer to Figure 1 and Figure 3 , this embodiment provides a technical solution: A gas valve structure, including a valve seat 1, a valve disc 2 is fixedly assembled on the top of the valve seat 1, a valve cover 3 is fixedly assembled on the top of the valve disc 2, spring holes 4 are evenly opened in the valve cover 3, the spring holes 4 are conical, a spring 5 is assembled in the spring holes 4, and a traditional gas valve structure composed of the valve seat 1, the valve disc 2, the valve cover 3 and the spring 5 is used for assembling in a compressor to control the inhalation and discharge of gas into and out of the cylinder. A positioning component 6 for positioning the spring 5 is arranged on the top of the valve disc 2. Compared with the traditional gas valve structure, the positioning component 6 is added. Through the arranged positioning component 6, the situation that the spring 5 does not move along the central axis during the use of the gas valve structure (here refers to the spring generating bias pressure) can be effectively reduced. If the spring 5 often generates bias pressure during the use, it will cause friction between the spring 5 and the inner wall of the spring hole 4, shortening the service life of the spring 5.

[0016] The positioning component 6 includes a positioning groove 61, which is evenly formed on the side wall of the valve plate 2. The position of the positioning groove 61 corresponds to the position of the spring hole 4. This positioning component 6 is specifically designed for the valve plate air valve structure made of plastic material. Its positioning groove 61 is processed together with the valve plate 2 by injection molding during the production process. The positioning groove 61 is easier to process and has almost no increase in cost compared with the traditional structure. By setting the cooperation between the positioning groove 61 and the conical spring hole 4, it can effectively prevent the spring 5 from generating bias pressure in the spring hole 4, reduce the wear between the spring 5 and the inner wall of the spring hole 4, and extend the service life of the spring 5.

[0017] Embodiment 2

[0018] Please refer to Figure 2 and Figure 3 , the difference between the technical solution provided in this embodiment and the technical solution in Embodiment 1 is that: the positioning component 6 includes a positioning protrusion 62, which is integrally formed on the side wall of the valve plate 2. The position of the positioning protrusion 62 corresponds to the position of the spring hole 4. The positioning protrusion 62 is also processed together with the valve plate 2 by injection molding. The positioning protrusion 62 can also cooperate with the spring hole 4 to play the role of positioning the spring 5, effectively reducing the bias pressure generated by the spring 5 in the spring hole 4 and reducing the wear between the spring 5 and the inner wall of the spring hole 4. The difference between using the positioning protrusion 62 and the positioning groove 61 is that the positioning groove 61 is easier to process than the positioning protrusion 62, but it is more difficult to control the lift. Although the processing difficulty of the positioning protrusion 62 is slightly greater, the control of the lift is more accurate.

Claims

1. A gas valve structure, comprising a valve seat (1), characterized in that: The top of the valve seat (1) is equipped with a valve plate (2), the top of the valve plate (2) is equipped with a valve cover (3), a spring hole (4) is opened in the valve cover (3), a spring (5) is installed in the spring hole (4), and a positioning component (6) is fixedly installed on the top of the valve seat (1).

2. A gas valve structure according to claim 1, characterized in that: The spring hole (4) is tapered.

3. The air valve structure according to claim 1, characterized in that: The positioning assembly (6) comprises a positioning groove (61), wherein the positioning groove (61) is formed on the side wall of the valve plate (2), and the positioning groove (61) corresponds to the position of the spring hole (4).

4. The air valve structure according to claim 1, characterized in that: The positioning assembly (6) comprises a positioning protrusion (62), the positioning protrusion (62) is fixedly connected to the side wall of the valve plate (2), and the position of the positioning protrusion (62) corresponds to the position of the spring hole (4).

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