Valve rod telescopic protection device of high-temperature-resistant gate valve

Abstract

The utility model discloses a valve rod telescopic protection device of a high-temperature-resistant gate valve, which relates to the field of gate valves, and is characterized by comprising a fixed part A mounted on a valve rod and a fixed part B mounted on a valve body, the fixed part A and the fixed part B are hermetically connected with the valve rod and the valve body through annular sealing pieces, and the fixed part A and the fixed part B are fixedly connected with the valve rod through the annular sealing pieces. And a telescopic hose is mounted between the fixing part A and the fixing part B. The valve has the effects that the fixing part A is mounted on the valve rod, the fixing part B is mounted on the valve body, and when the valve rod moves up and down to open and close the valve, the telescopic hose can stretch and retract along with the valve rod, so that the fixing part A is static relative to the valve rod, and the fixing part B is static relative to the valve body; therefore, high-temperature dust entering the joint of the valve rod and the valve body due to telescopic movement of the valve rod is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of gate valve, more specifically, it relates to a valve rod telescopic protection device of high temperature resistant gate valve. BACKGROUND

[0002] In industrial production, especially in some high temperature environment (such as metallurgy, chemical industry and other industries), gate valve is widely used as an important component to control the on-off of fluid. The valve stem of the gate valve needs to be frequently telescoped during the working process to realize the opening and closing of the valve. However, in high temperature environment, a large amount of high temperature dust is easy to enter the connection between the valve stem and the valve body (through the gap when the valve stem is active).

[0003] These high temperature dust not only causes wear on the surface of the valve stem, reducing the service life of the valve stem, but also, as the wear intensifies, may cause the sealing performance between the valve stem and the valve body to decline, thereby affecting the normal operation of the gate valve, and even may cause safety accidents.

[0004] Therefore, in order to solve the above technical problems, the present application provides a valve rod telescopic protection device of high temperature resistant gate valve. CONTENT OF THE UTILITY MODEL

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a valve rod telescopic protection device of high temperature resistant gate valve.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a valve rod telescopic protection device of high temperature resistant gate valve, comprising a fixed part A installed on the valve stem, and a fixed part B installed on the valve body, the fixed part A and the fixed part B are sealed connected with the valve stem and the valve body through an annular sealing element, and a telescopic hose is installed between the fixed part A and the fixed part B.

[0007] Preferably, the fixed part A is installed on the valve stem, and the fixed part B is installed on the valve body, the fixed part A and the fixed part B are sealed connected with the valve stem and the valve body through an annular sealing element, and a telescopic hose is installed between the fixed part A and the fixed part B.

[0008] Preferably, the top end of the annular plate A is fixedly connected with a mounting bracket, the top end of the mounting bracket is fixedly connected with a connecting block on both sides, a through hole is formed in the connecting block, and screw holes are formed in the outer side wall of the valve stem on both sides.

[0009] Preferably, the fixed part B comprises a mounting seat installed on the valve body, a sealing gasket is fixedly connected to the bottom of the mounting seat, and the fixed plate B is installed on the valve body through a nut.

[0010] Preferably, the top of the sealing ring is provided with a V-shaped sealing structure, and the sealing effect is better.

[0011] Preferably, the V-shaped sealing structure comprises a root fixed on the top of the sealing ring, and an outer lip and an inner lip integrally formed on the top of the root, and the V-shaped structure is formed between the outer lip and the inner lip.

[0012] Preferably, a screw rod is arranged on the valve body, and a plurality of through holes for the screw rod to pass through are arranged on the outer side wall of the mounting seat in a circular array.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1、 the utility model discloses a fixed part A is installed on the valve stem, and a fixed part B is installed on the valve body, when the valve is opened and closed by moving up and down on the valve stem, the flexible hose will follow the expansion and contraction, so that the fixed part A is stationary relative to the valve stem, and the fixed part B is stationary relative to the valve body, so that the connection between the valve stem and the valve body is prevented from entering high-temperature dust caused by the expansion and contraction of the valve stem, thereby solving the problem that a large amount of high-temperature dust easily enters the connection between the valve stem and the valve body when the valve stem expands and contracts in a high-temperature environment in the background art,

[0015] 2、 the utility model discloses that the top of the rubber ring is provided with a V-shaped sealing structure, and the V-shaped structure has a certain amount of interference, when the inner lip contacts the valve stem, stress is generated on the sealing surface through the resilience of the structure itself, so that the rubber ring and the valve stem are in more closely contact, and better sealing effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the application, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0017] Figure 1 It is the whole structure schematic diagram of the utility model;

[0018] Figure 2 It is another angle specific structure schematic diagram of the utility model Figure 1

[0019] Figure 3 It is the specific structure schematic diagram of the utility model in the expansion protection device;

[0020] Figure 4 It is the specific structure schematic diagram of the utility model in the valve stem;

[0021] Figure 5 It is the specific structure schematic diagram of the utility model V-shaped sealing structure cross section

[0022] ​In the figure: 1, valve stem; 2, fixed part A; 201, annular plate A; 202, sleeve; 203, rubber ring; 204, mounting bracket; 205, connecting block; 206, through hole A; 207, screw hole 3, fixed part B; 301, mounting seat; 302, gasket; 303, through hole B; 4, flexible hose; 5, V-shaped sealing structure; 501, root; 502, outer lip; 503, inner lip. DETAILED DESCRIPTION

[0023] As Figures 1-4 shown, the utility model provides a valve stem telescopic protection device of high temperature resistant gate valve, including fixed part A2 installed on valve stem 1 and fixed part B3 installed on valve body, fixed part A2 and fixed part B3 are sealedly connected with valve stem 1 and valve body through annular sealing element, and telescopic flexible hose 4 is installed between fixed part A2 and fixed part B3.

[0024] When using, fixed part A2 is installed on valve stem 1, fixed part B3 is installed on valve body, when opening and closing the valve by moving up and down on valve stem 1, telescopic flexible hose 4 will follow telescopic, so that fixed part A2 is stationary relative to valve stem 1, and fixed part B3 is stationary relative to valve body, so that the connection of valve stem 1 and valve body enters high temperature dust caused by telescopic movement.

[0025] Fixed part A2 includes annular plate A201 installed on valve stem 1, sleeve 202 is installed in the inside of annular plate A201, rubber ring 203 is bonded on the inner side wall of sleeve 202, when fixed part A2 is installed on valve stem 1, sleeve 202 is also sleeved on the outer side wall of valve stem 1 at this time, and rubber ring 203 is extruded, can keep the sealing property of the connection between sleeve 202 and valve stem 1 well, and the sealing property of rubber ring 203 relative to valve stem 1 is not affected when valve stem 1 telescopic movement, annular plate A201 is fixedly connected with mounting bracket 204 at the top, connecting block 205 is fixedly connected on both sides of the top of mounting bracket 204, through hole A206 is formed in the inside of connecting block 205, screw hole 207 is formed on both sides of the outer side wall of valve stem 1, after sleeve 202 is sleeved on the outer side wall of valve stem 1, through hole A206 on connecting block 205 is just opposite screw hole 207 on valve stem 1, then, by screw through through hole A206 on connecting block 205 and clockwise rotating and installing into screw hole 207, annular plate A201 can be installed on valve stem 1.

[0026] And, the top of the rubber ring 203 is provided with a V-shaped sealing structure 5 (the V-shaped sealing structure 5 is also made of rubber), the V-shaped sealing structure 5 comprises a root 501 fixed on the top of the rubber ring 203, and an outer lip 502 and an inner lip 503 integrally formed on the top of the root 501, the outer lip 502 and the inner lip 503 form a V-shaped structure, the V-shaped structure has a certain amount of interference, when the inner lip 503 contacts the valve stem 1, stress is generated on the sealing surface through the resilience of the structure itself, so that the rubber ring 203 and the valve stem 1 realize more closely contact, so as to achieve better sealing effect.

[0027] The fixed part B3 comprises a mounting seat 301 mounted on the valve body, the bottom of the mounting seat 301 is fixedly connected with a sealing gasket 302, the valve body is provided with a screw rod, a plurality of through holes B303 for the screw rod to pass through are arranged on the outer side wall of the mounting seat 301 in a circular array, when mounting, the through holes B303 of the mounting seat 301 pass through the screw rod on the valve body, and then the nut is mounted on the screw rod, so that the mounting seat 301 is mounted on the valve body, at this time, the sealing gasket 302 is extruded, so that the mounting seat 301 and the valve body are sealed through the sealing gasket 302.

[0028] The above is only a preferred embodiment of the present application, and does not limit the present application in any form; any ordinary technical personnel in the industry can smoothly implement the present application according to the above description and the drawings; however, any equivalent changes, modifications and evolution made by the skilled in the art without departing from the technical scheme of the present application, using the above disclosed technical content, are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present application, all still belong to the protection scope of the technical scheme of the present application.

Claims

1. A high temperature resistant gate valve stem telescoping protector characterized by: The utility model provides a valve fixed part, including fixed part A (2) installed on valve stem (1), and fixed part B (3) installed on valve body, fixed part A (2) and fixed part B (3) are sealedly connected with valve stem (1) and valve body through annular seal, and telescopic hose (4) is installed between fixed part A (2) and fixed part B (3).

2. A telescopic stem protection device for a high temperature resistant gate valve according to claim 1, characterized in that: The fixed part A (2) comprises an annular plate A (201) installed on the valve stem (1), a sleeve (202) is installed inside the annular plate A (201), and a rubber ring (203) is bonded to the inner side wall of the sleeve (202).

3. A stem extension protection device for a high temperature resistant gate valve as defined in claim 2, wherein: The top end of the annular plate A (201) is fixedly connected with a mounting rack (204), both sides of the top end of the mounting rack (204) are fixedly connected with a connecting block (205), a through hole A (206) is formed in the connecting block (205), and screw holes (207) are formed in both sides of the outer side wall of the valve stem (1).

4. The telescoping stem protector for high temperature gate valves of claim 1, wherein: The fixed part B (3) comprises a mounting seat (301) installed on the valve body, and a sealing gasket (302) is fixedly connected to the bottom of the mounting seat (301).

5. A stem extension guard for a high temperature gate valve as defined in claim 2 wherein: The top of the rubber ring (203) is provided with a V-shaped sealing structure (5).

6. A stem extension guard for a high temperature gate valve as defined in claim 5 wherein: The V-shaped sealing structure (5) comprises a root (501) fixed to the top of the rubber ring (203), an outer lip (502) and an inner lip (503) integrally formed on the top of the root (501) and the root (501), and the outer lip (502) and the inner lip (503) form a V-shaped structure.

7. A stem extension guard for a high temperature gate valve as defined in claim 4 wherein: A screw rod is arranged on the valve body, and a plurality of through holes B (303) for the screw rod to pass through are arranged in a circular array on the outer side wall of the mounting seat (301).

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