Sealing structure of gas gate valve

Abstract

The utility model relates to a gas gate valve sealing structure which comprises a gate valve body, a gate plate and a sealing assembly. A channel is arranged in the gate valve body; the gate plate is slidably arranged in the gate valve body and used for controlling opening and closing of the channel. The sealing assembly comprises a metal sealing ring and an elastic sealing gasket; the metal sealing ring is detachably and fixedly arranged on the inner wall of the channel through a fastener, and the inner surface of the metal sealing ring is attached to the outer side wall of the gate plate in a matched mode. The elastic sealing gasket is fixedly arranged at the joint of the gate plate and the metal sealing ring, and when the gate plate seals the channel, the elastic sealing gasket is in sealing contact with the metal sealing ring. Through the arrangement, through the sealing assembly composed of the metal sealing ring and the elastic sealing gasket, the sealing effect of the flashboard is further improved, the structure is simple, cost is low, and accessories are convenient to maintain and replace.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve sealing technical field, more specifically, relate to a coal gas gate valve sealing structure. BACKGROUND

[0002] As an important equipment in the process of coal gas conveying and control, the sealing performance of the coal gas gate valve is directly related to the safety and stability of the coal gas conveying. In the prior art, the sealing structure of the coal gas gate valve has many problems. On the one hand, the traditional sealing method adopts elastic sealing materials such as rubber, however, in the process of coal gas conveying, some impurity particles contained in the coal gas are easy to cause abrasion to the sealing materials, resulting in the decline of the sealing performance, thereby causing the coal gas leakage, and there is a great safety hazard. On the other hand, under the extreme working conditions such as high temperature and high pressure, the performance of the sealing materials will change, such as the aging and deformation of the rubber materials, which further reduces the sealing effect and affects the normal use of the coal gas gate valve. In addition, the existing sealing structure is relatively complex in the process of installation and maintenance, and a lot of manpower and time cost are needed. Therefore, a new type of coal gas gate valve sealing structure is urgently needed to solve the problems existing in the prior art. SUMMARY

[0003] In order to overcome the deficiencies in the prior art, a coal gas gate valve sealing structure is provided to solve the technical problems of poor sealing performance, environmental adaptability and inconvenient maintenance of the existing gate valve.

[0004] In order to solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0005] A coal gas gate valve sealing structure comprises:

[0006] A gate valve body, a passage is arranged inside the gate valve body;

[0007] A gate plate, the gate plate is slidably arranged in the gate valve body, and the gate plate is used for controlling the opening and closing of the passage;

[0008] A sealing assembly, comprising a metal sealing ring and an elastic sealing gasket; the metal sealing ring is detachably fixed on the inner wall of the passage through a fastener, the inner surface of the metal sealing ring is matched and attached to the outer side wall of the gate plate; the elastic sealing gasket is fixedly arranged at the connection between the gate plate and the metal sealing ring, and the elastic sealing gasket is in sealing contact with the metal sealing ring when the gate plate closes the passage.

[0009] Preferably, the metal sealing ring is made of an alloy material.

[0010] Preferably, the elastic sealing gasket is fixedly installed on the outer side wall of the gate plate, and a limiting groove is formed in the inner wall of the metal sealing ring for the outer side end of the gate plate to extend into the limiting groove.

[0011] Preferably, the side wall of the elastic sealing pad is provided with a plurality of annular first sealing ribs in sealing contact with the side wall of the limiting groove.

[0012] Preferably, the inner side wall of the limiting groove is provided with a plurality of annular second sealing ribs in one-to-one sealing contact with the first sealing ribs.

[0013] Preferably, the limiting groove is wedge-shaped in cross section, and the elastic sealing pad is wedge-shaped in cross section.

[0014] Preferably, the side wall of the gate plate is provided with a plurality of annular grooves, and the back surface of the elastic sealing pad is provided with a plurality of annular limiting strips which are one-to-one correspondingly matched and embedded in the annular grooves.

[0015] Preferably, the side wall of the gate plate is provided with a plurality of annular grooves, and the back surface of the elastic sealing pad is provided with a plurality of annular limiting strips which are one-to-one correspondingly matched and embedded in the annular grooves.

[0016] Preferably, the elastic sealing pad has a mounting portion which is fixedly mounted on the gate plate by a fastening bolt or a fastening screw.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] The utility model can effectively improve the sealing performance, reduce the risk of gas leakage, adapt to extreme working conditions such as high temperature and high pressure, and be convenient to install and maintain. BRIEF DESCRIPTION OF DRAWINGS

[0019] The specific embodiments of the utility model will be further described in detail below with reference to the drawings.

[0020] Figure 1 It is a whole structure schematic view of the gas gate valve in the embodiment.

[0021] Figure 2 It is a structure schematic view of the first sealing assembly in the embodiment.

[0022] Figure 3 It is a structure schematic view of the second sealing assembly in the embodiment.

[0023] Figure 4 It is a structure schematic view of the third sealing assembly in the embodiment.

[0024] Figure 5 It is a structure schematic view of the fourth sealing assembly in the embodiment.

[0025] In the drawings: 1, gate valve body; 2, gate plate; 21, annular groove; 3, metal sealing ring; 31, limiting groove; 311, second sealing rib; 4, elastic sealing pad; 41, first sealing rib; 42, annular limiting strip; 43, mounting portion; 5, fastening screw. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example: Figures 1-5 As shown, this embodiment provides a gas gate valve sealing structure, including a gate valve body 1, a gate plate 2, and a sealing assembly; the gate valve body 1 has an internal channel; the gate plate 2 is slidably disposed inside the gate valve body 1, and the gate plate 2 is used to control the opening and closing of the channel; the sealing assembly includes a metal sealing ring 3 and an elastic sealing gasket 4; the metal sealing ring 3 is detachably fixed to the inner wall of the channel by fasteners, and the inner surface of the metal sealing ring 3 matches and fits against the outer wall of the gate plate 2; the elastic sealing gasket 4 is fixedly disposed at the connection between the gate plate 2 and the metal sealing ring 3, and when the gate plate 2 closes the channel, the elastic sealing gasket 4 and the metal sealing ring 3 are in sealing contact.

[0028] With the above settings, the sealing effect of the gate 2 is further improved by the sealing assembly composed of the metal sealing ring 3 and the elastic sealing gasket 4. The structure is simple, the cost is low, and it is easy to maintain and replace parts.

[0029] Preferably, the fastener is a bolt or screw. The elastic sealing gasket 4 is made of rubber material, which has good elasticity and corrosion resistance.

[0030] The installation method is as follows:

[0031] 1. First, fix the metal sealing ring 3 to the inner wall of the channel of the gate valve body 1 with bolts to ensure that the installation position of the metal sealing ring 3 is accurate and the sealing surface is flat.

[0032] 2. Then, install the elastic sealing gasket 4 at the connection between the gate 2 and the metal sealing ring 3. Pay attention to the installation direction and position of the elastic sealing gasket 4 so that it can effectively compensate for the gap.

[0033] 3. After installation, install the gate 2 in the channel of the gate valve body 1. Control the sliding of the gate 2 through the operating mechanism to open and close the channel. During use, regularly check the wear of the metal sealing ring 3 and the elastic sealing gasket 4. If a decrease in sealing performance is found, replace the corresponding sealing components in a timely manner.

[0034] In this embodiment of a gas gate valve sealing structure, the metal sealing ring 3 is made of alloy material, which improves the strength and service life of the metal sealing ring 3.

[0035] In the sealing structure of the coal gas gate valve, the elastic sealing gasket 4 is fixedly installed on the outer side wall of the gate plate 2, and the inner wall of the metal sealing ring 3 is provided with a limiting groove 31 for the outer side end of the gate plate 2 to extend into the limiting groove 31 for limiting, so that the positioning effect of the gate plate 2 is improved.

[0036] In the sealing structure of the coal gas gate valve, the side wall of the elastic sealing gasket 4 is provided with a plurality of annular first sealing ribs 41, and the first sealing ribs 41 are in sealing contact with the inner side wall of the limiting groove 31. In this way, the sealing effect is improved.

[0037] In the sealing structure of the coal gas gate valve, the inner side wall of the limiting groove 31 is provided with a plurality of annular second sealing ribs 311, and the first sealing ribs 41 and the second sealing ribs 311 are in sealing contact. In this way, the sealing effect is improved.

[0038] In the sealing structure of the coal gas gate valve, the cross section of the limiting groove 31 is wedge-shaped, and the cross section of the elastic sealing gasket 4 is wedge-shaped. In this way, the limiting of the gate plate 2 is facilitated.

[0039] In the sealing structure of the coal gas gate valve, the side wall of the gate plate 2 is provided with a plurality of annular grooves 21, and the back surface of the elastic sealing gasket 4 is provided with a plurality of annular limiting ribs 42, which are one-to-one correspondingly matched and embedded in the annular grooves 21. In this way, the installation stability of the elastic sealing gasket 4 is improved.

[0040] As an alternative embodiment, the side wall of the gate plate 2 is provided with a plurality of annular grooves 21, and one elastic sealing gasket 4 is installed in each annular groove 21, and the elastic sealing gasket 4 is in sealing contact with the metal sealing ring 3. The structure is simple and the cost is low.

[0041] In the sealing structure of the coal gas gate valve, the elastic sealing gasket 4 has a mounting portion 43, and the mounting portion 43 is fixedly installed on the gate plate 2 by means of fastening bolts or fastening screws 5. The installation stability of the elastic sealing gasket 4 is improved.

[0042] The above only describes the preferred embodiments of the utility model in detail, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the purpose of the utility model, and various changes should be included in the protection range of the utility model.

Claims

1. A seal structure for a coal gas gate valve, characterized by, The utility model relates to a gate valve, which comprises: a gate valve body (1) provided with a channel inside; a gate plate (2) slidably arranged in the gate valve body (1) and used for controlling the opening and closing of the channel; a sealing assembly comprising a metal sealing ring (3) and an elastic sealing gasket (4); the metal sealing ring (3) is detachably fixed on the inner wall of the channel by a fastener, and the inner surface of the metal sealing ring (3) is matched and attached to the outer side wall of the gate plate (2); the elastic sealing gasket (4) is fixed at the joint of the gate plate (2) and the metal sealing ring (3), and the elastic sealing gasket (4) is in sealing contact with the metal sealing ring (3) when the gate plate (2) closes the channel.

2. A seal for a coal gas gate valve as defined in claim 1, wherein, The metal sealing ring (3) is made of alloy material.

3. A seal for a coal gas gate valve as defined in claim 1, wherein, The elastic sealing gasket (4) is fixedly installed on the outer side wall of the gate plate (2) and the inner wall of the metal sealing ring (3), and a limiting groove (31) for the outer side end of the gate plate (2) to extend into is formed on the inner wall of the metal sealing ring (3).

4. A seal for a gas gate valve as defined in claim 3, wherein, The side wall of the elastic sealing gasket (4) is provided with a plurality of annular first sealing ribs (41) in sealing contact with the side wall of the limiting groove (31).

5. A seal for a coal gas gate valve as defined in claim 4, wherein, The inner side wall of the limiting groove (31) is provided with a plurality of annular second sealing ribs (311), and the first sealing ribs (41) and the second sealing ribs (311) are in one-to-one sealing contact.

6. A seal for a gas gate valve as defined in claim 3, wherein The cross section of the limiting groove (31) is wedge-shaped, and the cross section of the elastic sealing gasket (4) is wedge-shaped.

7. A seal for a gas gate valve as defined in claim 3, wherein The side wall of the gate plate (2) is provided with a plurality of annular grooves (21), and the back surface of the elastic sealing gasket (4) is provided with a plurality of annular limiting strips (42) which are one-to-one correspondingly matched and embedded in the annular grooves (21).

8. A seal for a gas gate valve as defined in claim 3, wherein The side wall of the gate plate (2) is provided with a plurality of annular grooves (21), and one elastic sealing gasket (4) is installed in each annular groove (21) and in sealing contact with the metal sealing ring (3).

9. A seal for a coal gas gate valve as defined in claim 3 wherein, The elastic sealing gasket (4) has a mounting portion (43) fixedly installed on the gate plate (2) by a fastening bolt or a fastening screw (5).

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