Vacuum baffle valve

Abstract

The utility model discloses a vacuum baffle valve which is characterized in that the vacuum baffle valve comprises a driving source and a valve plate, the valve plate is arranged in a valve body, the driving source further comprises a driving shaft, and the driving shaft is connected with the valve plate through a steel ball. The pressing ring and the steel ball are additionally arranged at the front end of the driving shaft, and a certain deviation space is reserved, so that the valve sealing plate can slightly deflect through deviation of the steel ball to adapt to the planeness difference of a sealing surface.

Description

Technical Field

[0001] The utility model relates to a vacuum valve, in particular to a vacuum baffle valve. Background Art

[0002] There are various driving and sealing methods for vacuum baffle valves. Currently, the mainstream structure on the market uses a cylinder connected to the valve plate to push the valve plate to move to the sealing surface, and seals are achieved by pressing sealing surfaces with sealing parts such as fluororubber.

[0003] At present, for the cylindrical valve body structure of the baffle valve, most of its sealing surfaces are at a certain distance from the machining reference surface; at the same time, for larger-diameter baffle valves, the processing of the annular sealing surface is more difficult and the accuracy is lower; in addition, due to the welding of subsequent components of the baffle valve body, shell deformation caused by welding stress occurs. In view of the above three situations, the sealing surfaces of the baffle valves basically have poor flatness, resulting in inconsistent contact dimensions between the O-ring on the valve plate and each point of the sealing surface, thus causing poor valve sealing or even air leakage. Content of the Utility Model

[0004] The purpose of the utility model is to provide a vacuum baffle valve to solve the disadvantages of poor valve sealing or even air leakage in the prior art.

[0005] The utility model is realized by the following technical solutions: A vacuum baffle valve, characterized in that it includes a driving source and a valve plate. The valve plate is arranged in the valve body. The driving source further includes a driving shaft, and the driving shaft is connected to the valve plate through a steel ball.

[0006] Further, a connecting rod is arranged on the driving shaft, and the front end of the connecting rod is closely attached to the steel ball.

[0007] Further, a connecting hole is arranged on the valve plate, and the steel ball is arranged in the connecting hole.

[0008] Further, a connecting rod pressing ring is arranged on the end face of the connecting hole.

[0009] Further, a convex platform is arranged at the front end of the connecting rod, and the convex platform is inserted into the connecting hole.

[0010] Further, a conical concave surface is arranged on the end face of the convex platform, and the steel ball is arranged in the conical concave surface.

[0011] Further, the outer diameter of the convex platform at the front end of the connecting rod is smaller than the inner diameter of the connecting rod pressing ring, so that the connecting rod is restricted in the connecting hole. There is a movement gap between the connecting rod and the valve plate and the connecting rod pressing ring, so that the connecting rod can deflect relative to the valve plate in the axial direction.

[0012] The beneficial effects of the vacuum baffle valve described in the utility model include:

[0013] By adding a retaining ring and steel balls to the front end of the driving shaft and reserving a certain offset space, the valve sealing plate can be slightly deflected through the offset of the steel balls to adapt to the difference in the flatness of the sealing surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. The drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0015] Figure 1 It is a schematic diagram of a vacuum baffle valve;

[0016] In the figure, 1 - driving source; 2 - driving shaft; 3 - valve body; 4 - connecting rod; 5 - connecting rod retaining ring; 6 - steel ball. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention to be protected, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0019] Such as Figure 1As shown in the figure, a vacuum baffle valve includes a driving source 1, a driving shaft 2, a valve body 3, a connecting rod 4, a connecting rod retaining ring 5, and a steel ball 6. The driving source 1 is a cylinder and is arranged on the valve body 3. The driving shaft 2 is arranged on the driving source 1 and inserted into the valve body 3. The connecting rod 4 is connected to the driving shaft 2, and a valve plate is arranged at the end of the connecting rod 4. A connecting hole is arranged on the valve plate. The connecting rod 4 is inserted into the connecting hole on the valve plate. A connecting rod retaining ring 5 is arranged on the end face of the connecting hole. A boss structure is arranged on the part of the connecting rod 4 extending into the connecting hole. The inner diameter of the connecting rod retaining ring 5 is smaller than the inner diameter of the boss, restricting the connecting rod 4 in the connecting hole. There is a movement gap between the connecting rod 4 and the valve plate and the connecting rod retaining ring 5, enabling the connecting rod 4 to deflect relative to the valve plate in the axial direction. A steel ball 6 is arranged between the end face of the connecting rod 4 and the bottom surface of the connecting hole. A conical concave surface is also arranged on the end face of the connecting rod 4. The steel ball 6 is in close contact with the conical concave surface and the bottom surface of the connecting hole.

[0020] The driving source 1 makes the driving shaft 2 move linearly. The driving shaft 2 is connected to the connecting rod 4. Since there is a certain offset space between the connecting rod 4 and the valve plate and the connecting rod retaining ring 5, when the valve plate contacts a sealing surface with a certain flatness difference, the steel ball 6 and the connecting rod 4 can deflect slightly relative to the valve plate to adapt to the inclination of the valve plate, thus realizing the adaptive function for sealing surfaces with different flatness, improving the sealing performance of the valve, and making the valve have better adaptability and reliability.

[0021] In the above embodiments, the basic principles, main features, and advantages of the present invention are described. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, any modifications and changes made by those skilled in the art that do not depart from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A vacuum baffle valve, characterized in that, It includes a driving source (1) and a valve plate, the valve plate is arranged in a valve body (3), the driving source (1) further includes a driving shaft (2), and the driving shaft (2) is connected to the valve plate through a steel ball (6).

2. The vacuum baffle valve according to claim 1, characterized in that, A connecting rod (4) is arranged on the driving shaft (2), and the front end of the connecting rod (4) is closely attached to the steel ball (6).

3. The vacuum baffle valve according to claim 2, wherein, A connecting hole is arranged on the valve plate, and the steel ball (6) is arranged in the connecting hole.

4. The vacuum baffle valve according to claim 3, wherein, A connecting rod retaining ring (5) is arranged on the end face of the connecting hole.

5. A vacuum baffle valve according to claim 4, characterized in that, A boss is arranged at the front end of the connecting rod (4), and the boss is inserted into the connecting hole.

6. A vacuum baffle valve according to claim 5, characterized in that, A conical concave surface is arranged on the end face of the boss, and the steel ball (6) is arranged in the conical concave surface.

7. A vacuum baffle valve according to claim 5, characterized in that, The outer diameter of the boss at the front end of the connecting rod (4) is smaller than the inner diameter of the connecting rod retaining ring (5), so that the connecting rod (4) is restricted in the connecting hole, and a movement gap is reserved between the connecting rod (4) and the valve plate and the connecting rod retaining ring (5), so that the connecting rod (4) can deflect relative to the valve plate in the axial direction.

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