Vacuum sealing structure of vacuum baffle valve

Abstract

The utility model discloses a vacuum sealing structure of a vacuum baffle valve, and belongs to the technical field of sealing structures. A vacuum sealing structure of a vacuum baffle valve comprises a valve shaft, an air cylinder base and a sealing ring, a valve shaft hole is formed in the middle of the air cylinder base, the valve shaft is installed in the valve shaft hole in a sliding mode, the sealing ring is arranged between the valve shaft and the valve shaft hole, and a sealing part is arranged on the valve shaft. A sealing part sliding groove corresponding to the sealing part is formed in the valve shaft hole, the sealing ring is arranged between the sealing part and the sealing part sliding groove, and a scrap storage groove used for storing scraps is formed in the bottom of the sealing part sliding groove. The sealing device has the advantages that the operation stability is high, and chippings generated by the sealing ring are prevented from falling into a vacuum environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealing structure technical field especially relates to vacuum sealing structure of vacuum flapper valve. BACKGROUND

[0002] Vacuum valve refers to in vacuum system, be used for change airflow direction, adjust gas flow size, cut off or connect pipeline's vacuum system element. Among them, the flapper valve is a common control valve, mainly used for medium flow regulation and cut-off. Its simple structure, convenient operation, is widely used in petroleum chemical industry, tap water, sewage treatment, electric power, metallurgy etc.

[0003] The valve shaft and the cylinder base of the vacuum flapper valve in the prior art are usually sealed by a metal sealing ring, and the metal debris generated after long-term use of the metal sealing ring will damage the internal components and pollute the vacuum environment, which will also affect the damage of the mechanical structure inside the valve and increase the failure rate of the valve. UTILITY MODEL CONTENT

[0004] The utility model discloses a vacuum sealing structure of vacuum flapper valve, which can solve the problem of damage to internal components and pollution of vacuum environment caused by metal debris generated after long-term use of the metal sealing ring between the valve shaft and the cylinder base of the vacuum flapper valve in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The vacuum sealing structure of the vacuum flapper valve comprises a valve shaft, a cylinder base and a sealing ring, the middle of the cylinder base is provided with a valve shaft hole, the valve shaft is slidingly installed in the valve shaft hole, a sealing ring is arranged between the valve shaft and the valve shaft hole, a sealing part is arranged on the valve shaft, a sealing part sliding groove corresponding to the sealing part is formed in the inside of the valve shaft hole, the sealing ring is arranged between the sealing part and the sealing part sliding groove, and a debris storage groove is arranged at the bottom of the sealing part sliding groove.

[0007] Further, the sealing part is in cylindrical structure, and the outer diameter of the sealing part is greater than the outer diameter of the valve shaft.

[0008] Further, the sealing part and the valve shaft are coaxial.

[0009] Further, the end of the debris storage groove bottom close to the valve shaft is higher than the end far away from the valve shaft.

[0010] Further, a storage cavity for storing debris is arranged below the debris storage groove, and the storage cavity is communicated with the debris storage groove.

[0011] Further, the storage cavity and the debris storage groove are provided with an inlet, and the inlet is a horn structure with a large upper part and a small lower part.

[0012] Further, the sealing ring is a polyimide sealing ring.

[0013] Compared with the prior art, the vacuum sealing structure of the vacuum flashboard valve has the following beneficial effects:

[0014] The vacuum sealing structure of the vacuum flashboard valve sets a debris storage groove below the sealing ring, so that when the sealing ring produces debris falling downward, the debris falls into the debris storage groove, avoids the debris from falling into the vacuum environment below the cylinder base and below the valve plate, thereby avoiding the debris from damaging the internal components of the vacuum flashboard valve and avoiding the pollution of the vacuum environment.

[0015] Other advantages, objects and features of the present application will be apparent in the following detailed description of the application; and, to some extent, will be apparent from the examination of the following text; or, can be taught from the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an installation effect schematic view of the overall structure of the present application in the vacuum flashboard valve;

[0017] Figure 2 It is an installation effect schematic view of the overall structure of the present application in the vacuum flashboard valve; Figure 1 It is an enlarged effect schematic view of the structure of part A;

[0018] Figure 3 It is a cross-sectional schematic view of the reinforcing groove structure of the present application;

[0019] Figure 4 It is a cross-sectional schematic view of the valve shaft structure of the present application.

[0020] In the drawings:

[0021] 1, valve body; 2, cylinder; 3, piston; 4, valve shaft; 5, spring; 6, valve plate; 7, cylinder base; 8, sealing ring; 9, sealing part; 10, sealing part sliding groove; 11, storage cavity; 12, inlet; 13, debris storage groove; 14, valve shaft hole. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0023] Reference Figures 1-4The utility model discloses a vacuum sealing structure of vacuum baffle valve, including valve body 1, cylinder 2, piston 3, valve shaft 4, spring 5, valve plate 6, cylinder base 7, sealing ring 8,

[0024] The cylinder 2 is arranged on the top of the inside of the valve body 1, the inside of the cylinder 2 is installed with the piston 3, the bottom of the cylinder 2 is the cylinder base 7, the middle of the cylinder base 7 is provided with the valve shaft hole 14, the valve shaft 4 is slidably arranged in the valve shaft hole 14, the top end of the valve shaft 4 is connected with the piston 3, the bottom end of the valve shaft 4 is connected with the valve plate 6, the valve plate 6 is used to open or close the valve port communicated with the vacuum environment, the spring 5 is installed on the valve shaft 4, and the spring 5 is located between the valve plate 6 and the cylinder base 7.

[0025] The valve shaft 4 is slidably arranged in the valve shaft hole 14 along the vertical direction, the valve shaft 4 is driven by the piston 3, and the piston 3 drives the valve plate 6 to open or close through the valve shaft 4.

[0026] The sealing ring 8 is arranged between the valve shaft 4 and the valve shaft hole 14, the valve shaft 4 is integrally formed with the sealing part 9, the valve shaft hole 14 is provided with the sealing part sliding groove 10 corresponding to the sealing part 9, and the sealing ring 8 is arranged between the sealing part 9 and the sealing part sliding groove 10, specifically, the sealing groove is formed in the inner wall of the sealing part sliding groove 10, and the sealing ring 8 is arranged in the sealing groove.

[0027] The bottom of the sealing part sliding groove 10 is processed with the storage groove 13 for storing the debris, that is, the storage groove 13 is located below the sealing ring 8, when the debris is generated after the sealing ring 8 is used for a long time, the debris falls downwards from the sealing part sliding groove 10 to the storage groove 13, so that the debris is prevented from falling between the cylinder base 7 and the valve plate 6 and the position below the valve plate 6.

[0028] The sealing part 9 is in a cylindrical structure, the outer diameter of the sealing part 9 is greater than that of the valve shaft 4, and the shape and size of the sealing part sliding groove 10 correspond to the sealing part 9.

[0029] Here, the axial height of the sealing part 9 is related to the stroke of the valve shaft 4, the height of the sealing part 9 is not less than the stroke value of the valve shaft 4 in single extension and contraction, the axial height of the sealing part sliding groove 10 is not less than twice the stroke value of the valve shaft 4 in single extension and contraction, and the sealing ring 8 is located at the middle position in the axial direction of the sealing part sliding groove 10, when the valve shaft 4 and the sealing part 9 make the extension and contraction movement in the vertical direction in the valve shaft hole 14, the sealing part 9 and the sealing ring 8 can keep good sealing connection effect.

[0030] The sealing part 9 and the valve shaft 4 are coaxial structures, and can also be eccentric structures, and here, the coaxial structure is selected, so that the stability of the sealing part 9 and the valve shaft 4 in the working process can be kept.

[0031] The end of the storage groove 13 bottom close to the valve shaft 4 is higher than the end away from the valve shaft 4, and the specific like Figure 3As shown, after the debris falls into the debris storage groove 13, it falls at a lower position of the debris storage groove 13, and the lower position is far away from the valve shaft 4, thereby reducing the risk of the debris falling out of the debris storage groove 13.

[0032] The lower part of the debris storage groove 13 is processed with a storage cavity 11 for storing the debris, and the storage cavity 11 is communicated with the debris storage groove 13. Since the debris storage groove 13 is close to the valve shaft 4 and has a large opening, it is not conducive to store the debris for a long time, so the debris is put into the storage cavity 11, thereby further reducing the risk of the debris falling out of the debris storage groove 13.

[0033] Specifically, the storage cavity 11 and the debris storage groove 13 are processed with an inlet 12, and the inlet 12 is a horn structure with a large upper part and a small lower part. Figure 2 As shown, when the debris falls from the debris storage groove 13 into the storage cavity 11, the width size of the inlet 12 is much smaller than the top opening of the debris storage groove 13 and the internal width size of the storage cavity 11, so that the debris is not easy to fall out after entering the storage cavity 11.

[0034] The sealing ring 8 is a polyimide sealing ring, and the polyimide sealing ring is selected instead of a metal sealing. The material can avoid the influence of metal debris generated by friction on the internal mechanical components of the valve and the pollution to the vacuum in the long-term working condition. Moreover, the material itself has high self-lubrication performance, high temperature resistance and corrosion resistance, which can greatly reduce the influence of the metal material on the structure of the valve in the long-term use, improve the lubrication performance of the valve shaft in the lifting movement, reduce the failure rate of the valve and the pollution to the vacuum.

[0035] Working principle: when in use, the piston 3 drives the valve shaft 4 to move up and down in the valve shaft hole 14, and further drives the valve plate 6 to open or close.

[0036] After a long time of use, when the sealing ring 8 generates debris, the debris falls downward into the debris storage groove 13, and then falls into the storage cavity 11 through the inlet 12, thereby avoiding the pollution of the debris to the vacuum environment.

[0037] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

[0038] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0039] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A vacuum seal structure of a vacuum flapper valve, comprising a valve shaft (4), a cylinder base (7), and a sealing ring (8), wherein a valve shaft hole (14) is formed in the middle of the cylinder base (7), the valve shaft (4) is slidingly installed in the valve shaft hole (14), and the sealing ring (8) is arranged between the valve shaft (4) and the valve shaft hole (14), characterized in that, The valve shaft (4) is provided with a sealing part (9), the valve shaft hole (14) is internally provided with a sealing part sliding groove (10) corresponding to the sealing part (9), the sealing ring (8) is arranged between the sealing part (9) and the sealing part sliding groove (10), and the bottom of the sealing part sliding groove (10) is provided with a storage groove (13) for storing debris.

2. The vacuum seal structure of the vacuum flapper valve according to claim 1, characterized by, The sealing part (9) is in a cylindrical structure, and the outer diameter value of the sealing part (9) is greater than the outer diameter value of the valve shaft (4).

3. The vacuum seal structure of the vacuum flapper valve according to claim 2, characterized by, The sealing part (9) and the valve shaft (4) are coaxial structures.

4. The vacuum seal structure of the vacuum flapper valve according to claim 3, wherein The bottom of the storage groove (13) is higher at one end close to the valve shaft (4) than at the other end away from the valve shaft (4).

5. The vacuum seal structure of the vacuum flapper valve according to claim 4, wherein, A storage cavity (11) for storing debris is arranged below the storage groove (13), and the storage cavity (11) is in communication with the storage groove (13).

6. The vacuum seal structure of the vacuum flapper valve according to claim 5, wherein An inlet (12) is arranged between the storage cavity (11) and the storage groove (13), and the inlet (12) is in a horn structure with a large upper part and a small lower part.

7. The vacuum seal structure of the vacuum flapper valve according to claim 1, wherein The sealing ring (8) is a polyimide sealing ring.

Images