High-temperature-resistant stop valve

Abstract

The utility model relates to a high-temperature-resistant stop valve which comprises a valve body, a gland and a valve rod, an annular sealing plate is arranged between the valve body and the valve rod, a deformation mechanism is arranged in the middle of the sealing plate, and the inner side wall and the outer side wall of the sealing plate are respectively connected with the outer side wall of the valve rod and the inner side wall of the valve body in a sealing mode. Due to the fact that the deformation mechanism is arranged in the middle of the sealing plate, the inner side wall and the outer side wall of the sealing plate do not need to slide or relatively slide on the valve rod or the valve body in cooperation with lifting of the valve rod, abrasion can be avoided, and the service life of the sealing mechanism in the valve body is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a high-temperature resistant stop valve. Background Art

[0002] A high temperature resistant stop valve is a valve specially designed to control and regulate the flow of high temperature fluids through a pipeline system. At present, a utility model patent with the announcement number CN217713687U discloses a sealing structure for a high temperature resistant stop valve. This patent can effectively maintain the sealing and high temperature resistance of the structure by performing sealing separation and cooling cycle on the high temperature stop valve, so that the stop valve can better adapt to the high temperature working environment and avoid leakage.

[0003] The patent's solution to prevent the medium from leaking from between the valve body and the valve stem is: a mounting ring is provided between the valve body and the valve cover, and then the upper end of the valve body can be sealed by the mounting ring, the movable sealing ring valve cover and the upper end of the hollow transmission sleeve. The disadvantage of this structure is that during long-term use, the outer walls of the movable sealing ring and the hollow transmission sleeve will be worn during the up and down movement, so that a gap will be generated between the movable sealing ring and the hollow transmission sleeve, resulting in medium leakage. Utility Model Content

[0004] The utility model provides a high temperature resistant stop valve, which solves the above problems existing in the use process of the prior art.

[0005] The technical solution of the utility model is implemented as follows: a high-temperature resistant stop valve includes a valve body, a pressure cover and a valve stem, an annular sealing plate is arranged between the valve body and the valve stem, a deformation mechanism is arranged in the middle of the sealing plate, and the inner and outer side walls of the sealing plate are respectively sealed and connected with the outer side wall of the valve stem and the inner side wall of the valve body.

[0006] The utility model is further configured as follows: annular walls are fixedly provided on the inner and outer side walls of the sealing plate, sealing gaskets are provided on the side walls of the annular walls facing away from the sealing plate, screws are provided on the annular walls, threaded openings are provided on the outer side wall of the valve stem and the inner side wall of the valve body, and the screws penetrate the sealing gaskets and are connected to the threaded openings.

[0007] The utility model is further configured as follows: the deformation mechanism comprises a corrugated plate, and the corrugations of the corrugated plate are configured to expand gradually from the inside to the outside.

[0008] The utility model is further configured as follows: a limiting sleeve is threadedly connected to the inner wall of the valve body and the outer wall of the valve stem, a limiting wall is arranged at one end of the limiting sleeve, and the limiting wall is used to abut against the end surface of the annular wall facing the sealing plate.

[0009] The utility model is further configured as follows: an elastic supporting piece is arranged on the end surface of the limiting wall facing the annular wall.

[0010] The utility model is further configured as follows: the elastic supporting member comprises a spring leaf, and the spring leaf is arched toward the annular wall.

[0011] The utility model is further configured as follows: the valve stem and the valve body are respectively welded to the upper and lower ends of the annular wall, and the annular wall is covered outside the sealing gasket.

[0012] In summary, the beneficial effects of the present invention are:

[0013] 1. Since a deformation mechanism is provided in the middle of the sealing plate, the inner and outer side walls of the sealing plate do not need to slide or slide relatively on the valve stem or valve body in coordination with the rise and fall of the valve stem, thereby avoiding the occurrence of wear and further extending the service life of the sealing mechanism in the valve body.

[0014] 2. Gaskets and screws fix the sealing plate to the valve stem and valve body on the one hand, and prevent medium leakage on the other hand.

[0015] 3. The corrugated plate can deform in coordination with the rise and fall of the valve stem.

[0016] 4. Welding the valve stem and the valve body to the annular wall is beneficial to reducing the number of screws and further strengthening the connection strength between the sealing plate and the valve stem and the valve body.

[0017] 5. The limiting sleeve is used to press the annular wall onto the sealing gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0021] Reference numerals in the figure: 11 valve body, 12 gland, 13 valve stem, 14 packing, 21 sealing plate, 22 annular wall, 23 sealing gasket, 24 screw, 25 threaded port, 26 corrugated plate, 27 limiting sleeve, 28 limiting wall, 29 reed. DETAILED DESCRIPTION

[0022] The following will be combined with the attached embodiment of the utility model Figure 1-2 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. 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.

[0023] Example:

[0024] like Figure 1 to Figure 2 As shown, the utility model discloses a high temperature resistant stop valve, including a valve body 11, a gland 12 and a valve stem 13. The valve stem 13 in the utility model is of a lifting and rotating type, which is conducive to reducing the impact of high temperature on the packing 14.

[0025] An annular sealing plate 21 is arranged between the valve body 11 and the valve stem 13. The sealing plate 21 is located below the pressure cover 12. A deformation mechanism is arranged in the middle of the sealing plate 21. At the same time, the inner and outer side walls of the sealing plate 21 are sealedly connected with the outer side wall of the valve stem 13 and the inner side wall of the valve body 11 respectively.

[0026] Specifically, an annular wall 22 is fixedly provided on the inner and outer side walls of the sealing plate 21. The annular wall 22 and the sealing plate 21 are integrally formed or the edge of the sealing plate 21 is sealed and connected to the side wall of the annular wall 22 by welding. A sealing gasket 23 is provided on the side wall of the annular wall 22 facing away from the sealing plate 21, and a screw 24 is provided on the annular wall 22. Correspondingly, a threaded opening 25 is provided on the outer side wall of the valve stem 13 and the inner side wall of the valve body 11. In this structure, the screw 24 penetrates the sealing gasket 23 and is connected to the threaded opening 25.

[0027] The working principle of this structure is as follows: the screws 24 are used to install the sealing plate 21 with the valve stem 13 and the valve body 11, the sealing gasket 23 is used to prevent the medium from leaking to the gland 12, and the deformation mechanism can help the sealing plate 21 so that the inner and outer side walls of the sealing plate 21 do not need to slide or slide relatively on the valve stem 13 or the valve body 11 in accordance with the lifting and lowering of the valve stem 13. The advantage of this structure is that on the one hand, the service life of the sealing plate 21 and the sealing gasket 23 is extended due to the existence of the deformation mechanism, and at the same time, the sealing plate 21 can isolate the medium and prevent the medium from directly contacting the packing 14, which can further protect the packing 14 and extend its service life.

[0028] The deformation mechanism specifically includes a corrugated plate 26, and the corrugations of the corrugated plate 26 are gradually expanded from the inside to the outside.

[0029] Furthermore, a limiting sleeve 27 is threadedly connected to the inner wall of the valve body 11 and the outer wall of the valve stem 13. A limiting wall 28 is provided at one end of the limiting sleeve 27 close to the annular wall 22. The limiting wall 28 is specifically used to abut against the end face of the annular wall 22 toward the sealing plate 21, thereby pressing the sealing gasket 23.

[0030] An elastic abutment member is disposed on the end surface of the limiting wall 28 facing the annular wall 22 . The elastic abutment member includes a spring leaf 29 . The spring leaf 29 is arched toward the annular wall 22 .

[0031] The valve stem 13 and the valve body 11 are respectively welded to the upper and lower ends of the annular wall 22. The annular wall 22 covers the outside of the sealing gasket 23. Welding is beneficial to reduce the number of screws 24, and at the same time can further strengthen the connection strength between the sealing plate 21 and the valve stem 13 and the valve body 11. At the same time, the welding can be achieved by welding the outer edge of the annular wall 22 to the side wall of the valve stem 13 or the valve body 11, which can further enhance the sealing effect.

[0032] It should also be pointed out that the terms used in the present invention, such as "front", "rear", "vertical", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature resistant stop valve, comprising a valve body (11), a gland (12) and a valve stem (13), characterized in that: An annular sealing plate (21) is provided between the valve body (11) and the valve stem (13), a deformation mechanism is provided in the middle of the sealing plate (21), and the inner and outer side walls of the sealing plate (21) are respectively sealedly connected to the outer side wall of the valve stem (13) and the inner side wall of the valve body (11).

2. A high temperature resistant stop valve according to claim 1, characterized in that: An annular wall (22) is fixedly provided on the inner and outer side walls of the sealing plate (21), a sealing gasket (23) is provided on the side wall of the annular wall (22) facing away from the sealing plate (21), a screw (24) is provided on the annular wall (22), a threaded opening (25) is provided on the outer side wall of the valve stem (13) and the inner side wall of the valve body (11), and the screw (24) penetrates the sealing gasket (23) and is connected to the threaded opening (25).

3. A high temperature resistant stop valve according to claim 2, characterized in that: The deformation mechanism comprises a corrugated plate (26), and the corrugations of the corrugated plate (26) are arranged to gradually expand from the inside to the outside.

4. A high temperature resistant stop valve according to claim 2, characterized in that: The inner wall of the valve body (11) and the outer wall of the valve stem (13) are both threadedly connected to a limiting sleeve (27), one end of the limiting sleeve (27) is provided with a limiting wall (28), and the limiting wall (28) is used to abut against the end surface of the annular wall (22) facing the sealing plate (21).

5. A high temperature resistant stop valve according to claim 4, characterized in that: An elastic supporting piece is provided on the end surface of the limiting wall (28) facing the annular wall (22).

6. A high temperature resistant stop valve according to claim 5, characterized in that: The elastic supporting member comprises a leaf spring (29), and the leaf spring (29) is arched toward the annular wall (22).

7. A high temperature resistant stop valve according to claim 2, characterized in that: The valve stem (13) and the valve body (11) are respectively welded to the upper and lower ends of the annular wall (22), and the annular wall (22) is covered outside the sealing gasket (23).

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