Sealing structure of corrugated pipe valve

Abstract

The utility model discloses a sealing structure of a corrugated pipe valve, which relates to the technical field of valves, is arranged at the upper end of a valve body and is used for sealing a corrugated pipe base, the corrugated pipe base is arranged on a valve rod, the sealing structure comprises a pressing plate, a sealing piece and a bolt, the upper end of the valve body is provided with a mounting groove, the sealing piece is arranged in the mounting groove, and the bolt is arranged in the mounting groove. The sealing piece is arranged at the lower end of the corrugated pipe base, and the pressing plate is installed at the upper end of the valve body through a plurality of bolts and located at the upper end of the corrugated pipe base. Through cooperation of the pressing plate, the sealing piece and the bolt, the lower end of the corrugated pipe base can be tightly pressed on the sealing piece, the situation that the corrugated pipe base is loosened due to reciprocating stretching and retracting of the corrugated pipe can be avoided, the sealing effect is improved, and mounting or dismounting of the corrugated pipe base is also facilitated.

Description

Technical Field

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

[0002] Due to its structural characteristics, bellows valves are mainly used in industrial pipelines with special media such as flammable, explosive, toxic, highly permeable, and with nuclear radiation, and in harsh working conditions. Because it has a metal bellows seal and no external leakage points, it has been widely used in petrochemical, nuclear power, polyester chemical fiber, pharmaceutical, aerospace and other industries. In recent years, as people's awareness of environmental protection has increased, bellows valves are also used in occasions with higher environmental requirements. The use of bellows valves is becoming more and more widespread.

[0003] The bellows valve in the prior art is characterized by arranging a handle at the upper end of the valve body, one end of the valve stem extending into the valve body and connected to the valve core, the other end of the valve stem extending into the handle, and a bellows, a bellows top seat and a bellows base are sleeved on the other end of the valve stem, wherein the two ends of the bellows are connected to the bellows top seat and the bellows base, and the bellows base is arranged in the opening at the upper end of the valve body and is sealed with the valve body by a sealing ring.

[0004] The prior art has the following technical defects: during use, when the bellows is extended, the bellows will apply an upward pulling force to the bellows base, making the sealing ring between the bellows base and the valve body easy to loosen, resulting in fluid leakage inside the valve body and poor sealing effect. Utility Model Content

[0005] The utility model aims to provide a sealing structure of a bellows valve to solve the above technical problems.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A sealing structure of a bellows valve is arranged at the upper end of a valve body and is used for sealing a bellows base. The bellows base is installed on a valve stem. The sealing structure includes a pressure plate, a sealing member and bolts. An installation groove is provided at the upper end of the valve body. The sealing member is arranged in the installation groove. The sealing member is arranged at the lower end of the bellows base. The pressure plate is installed at the upper end of the valve body by means of a plurality of bolts, and the pressure plate is located at the upper end of the bellows base.

[0008] Preferably, the pressing plate is arranged in a ring shape, and a through hole is provided in the middle of the pressing plate.

[0009] Preferably, the sealing member comprises a sealing ring arranged in an annular shape, and at least two notches are formed at an upper end of the sealing ring.

[0010] As a further preference, a first convex ring is provided at the upper end of the sealing ring, and the first convex ring is located on the periphery of the valve stem.

[0011] As a further preference, a first annular groove is formed at the lower end of the bellows base, and the first convex ring is disposed in the first annular groove.

[0012] As a further preference, a second convex ring is provided at the lower end of the sealing ring, a second annular groove is opened on the lower inner wall of the mounting groove, and the second convex ring is arranged in the second annular groove.

[0013] As a further preference, a plurality of third convex rings are provided on the outer edge of the sealing ring, a plurality of third annular grooves are opened on the side wall of the mounting groove, and the third convex rings are arranged in the third annular grooves.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] In the utility model, the lower end of the bellows base can be pressed against the seal by the cooperation of the pressure plate, the seal and the bolts, which can prevent the bellows base from loosening due to the reciprocating expansion and contraction of the bellows, improve the sealing effect, and facilitate the installation or disassembly of the bellows base. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of the sealing structure of the bellows valve in the utility model;

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0018] In the figure: 1. pressure plate; 2. sealing member; 3. bolt; 4. mounting groove; 5. base of bellows; 6. sealing ring; 7. notch; 8. first convex ring; 9. first annular groove; 10. second convex ring; 11. second annular groove; 12. third convex ring; 13. third annular groove; 14. valve body; 15. valve stem; 16. handle; 17. bellows; 18. top seat of bellows; 19. hemispherical protrusion; 20. sealing part. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0020] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Figure 1 It is a schematic diagram of the internal structure of the sealing structure of the bellows valve in the utility model; Figure 2 yes Figure 1 For the enlarged view of point A in the middle, please see Figure 1 to Figure 2 As shown, a preferred embodiment is shown, which shows a sealing structure of a bellows valve, which is arranged at the upper end of the valve body 14 and is used to seal the bellows base 5. The bellows base 5 is installed on the valve stem 15. The sealing structure includes a pressure plate 1, a sealing member 2 and a bolt 3. The upper end of the valve body 14 is provided with a mounting groove 4, and a sealing member 2 is arranged in the mounting groove 4. The sealing member 2 is arranged at the lower end of the bellows base 5. The pressure plate 1 is installed at the upper end of the valve body 14 through a plurality of bolts 3, and the pressure plate 1 is located at the upper end of the bellows base 5. In this embodiment, see Figure 1As shown, the structure of the bellows 17 valve is an existing structure, and its working principle is in the prior art. The bellows 17 valve comprises a valve body 14, a valve stem 15, a handle 16, a bellows 17, a bellows top seat 18 and a hemispherical protrusion 19, wherein the lower end of the valve stem 15 extends into the valve body 14 and is connected with a sealing portion 20, and the upper end of the valve body 14 is threadedly connected with the handle 16, and the upper end of the valve stem 15 extends into the handle 16, and the bellows 17 and a spring are sleeved on the outer edge of the upper end of the valve stem 15, and the spring is arranged on the periphery of the bellows 17, and the upper end of the valve stem 15 is provided with a bellows top seat 18, and the upper end of the bellows top seat 18 is provided with a hemispherical protrusion 19, and the upper inner wall of the handle 16 is provided with a notch 7 matched with the hemispherical protrusion 19, and the hemispherical protrusion 19 is arranged to facilitate the rotation of the handle 16. The upper end of the valve stem 15 is also provided with a bellows base 5, see Figure 1 As shown, both ends of the bellows 17 and the spring are welded to the bellows top seat 18 and the bellows base 5. By rotating the handle 16, the handle 16 moves up and down, so that the valve stem 15 moves up and down, thereby opening or closing the channel in the valve body 14.

[0023] In this embodiment, see Figure 1 As shown, a circular hole is provided at the upper end of the valve body 14 for the valve stem 15 to pass through, wherein the mounting groove 4 is connected to the circular hole, and the seal 2 and the bellows base 5 are both installed in the mounting groove 4, and the bellows base 5 and the seal 2 are fixed in the mounting groove 4 by the cooperation of the pressure plate 1 and the bolts 3, wherein there are several bolts 3, and the bellows base 5 is pressed downward by the pressure plate 1, so that the bellows base 5 presses the seal 2 downward, so that the seal 2 produces a certain deformation, thereby achieving a sealing effect. In this embodiment, the bellows base 5 and the seal 2 can be installed in the mounting groove 4 by the cooperation of the pressure plate 1 and the bolts 3, which can not only achieve a sealing effect, but also facilitate the disassembly of the bellows base 5, and can avoid the situation where the bellows base 5 becomes loose when the bellows 17 reciprocates and expands.

[0024] Further, as a preferred embodiment, the pressing plate 1 is arranged in a ring shape, and a through hole is arranged in the middle of the pressing plate 1. Figure 1 As shown, a through hole is provided in the middle of the pressing plate 1 to prevent the bellows 17 and the spring from being blocked, so that the lower ends of the bellows 17 and the spring can be connected and fixed to the bellows base 5. The lower surface of the pressing plate 1 in this embodiment contacts the upper surface of the bellows base 5.

[0025] Further, as a preferred embodiment, the sealing member 2 includes a sealing ring 6 arranged in an annular shape, and at least two notches 7 are formed at the upper end of the sealing ring 6. Figure 2As shown, the upper end of the sealing ring 6 is provided with a first convex ring 8, and the first convex ring 8 is located on the periphery of the valve stem. The lower end of the bellows base 5 is provided with a first annular groove 9, and the first convex ring 8 is arranged in the first annular groove 9. The lower end of the sealing ring 6 is provided with a second convex ring 10, and the lower inner wall of the installation groove 4 is provided with a second annular groove 11, and the second convex ring 10 is arranged in the second annular groove 11. The outer edge of the sealing ring 6 is provided with a plurality of third convex rings 12, and the side wall of the installation groove 4 is provided with a plurality of third annular grooves 13, and the third convex ring 12 is arranged in the third annular groove 13. In this embodiment, see Figure 2 As shown, the sealing ring 6, the first convex ring 8, the second convex ring 10 and the third convex ring 12 are integrally arranged. The first convex ring 8 cooperates with the first annular groove 9, the second convex ring 10 cooperates with the second annular groove 11, and the third convex ring 12 cooperates with the third annular groove 13, which can effectively improve the sealing effect and prevent fluid leakage. Among them, two notches 7 are arranged on the sealing ring 6, which are convenient for fingers to reach into the notches 7 to take out or install the sealing ring 6.

[0026] When in use, first install the sealing ring 6 so that the second convex ring 10 on the sealing ring 6 enters the second annular groove 11, and the third convex ring 12 enters the third annular groove 13, and then install the bellows base 5 so that the first annular groove 9 at the lower end of the bellows base 5 cooperates with the first convex ring 8, and then install the pressure plate 1, and fix the pressure plate 1 to the upper end of the valve body 14 by the bolts 3, so that the lower end of the pressure plate 1 presses the bellows base 5, which can prevent the bellows base 5 from loosening.

[0027] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing structure of a bellows valve, arranged at the upper end of the valve body, used for sealing the bellows base, the bellows base being mounted on the valve stem, characterized in that: The sealing structure includes a pressure plate, a sealing member and bolts. A mounting groove is provided at the upper end of the valve body, and the sealing member is provided in the mounting groove. The sealing member is provided at the lower end of the bellows base. The pressure plate is installed at the upper end of the valve body through a plurality of bolts, and the pressure plate is located at the upper end of the bellows base.

2. The sealing structure of the bellows valve according to claim 1, characterized in that: The pressing plate is arranged in an annular shape, and a through hole is arranged in the middle of the pressing plate.

3. The sealing structure of the bellows valve according to claim 1, characterized in that: The sealing member comprises a sealing ring arranged in an annular shape, and at least two notches are formed at the upper end of the sealing ring.

4. The sealing structure of the bellows valve according to claim 3, characterized in that: A first convex ring is provided at the upper end of the sealing ring, and the first convex ring is located on the periphery of the valve stem.

5. The sealing structure of the bellows valve according to claim 4, characterized in that: A first annular groove is formed at the lower end of the bellows base, and the first convex ring is arranged in the first annular groove.

6. The sealing structure of the bellows valve according to claim 3, characterized in that: A second convex ring is provided at the lower end of the sealing ring, a second annular groove is provided on the lower inner wall of the mounting groove, and the second convex ring is arranged in the second annular groove.

7. The sealing structure of the bellows valve according to claim 3, characterized in that: The outer edge of the sealing ring is provided with a plurality of third convex rings, the side wall of the mounting groove is provided with a plurality of third annular grooves, and the third convex rings are arranged in the third annular grooves.

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