CN219888768U - Corrugated pipe valve seat soft and hard sealing flat gate valve - Google Patents

Abstract

The utility model discloses a corrugated pipe valve seat soft and hard sealing flat gate valve which comprises a valve body, a valve cover, a gate plate, a first valve seat, a corrugated pipe and a second valve seat, wherein a metal sealing structure is formed between the gate plate and the first valve seat, a groove is formed in one side of the gate plate, which faces the first valve seat, of the gate plate, a sealing ring is arranged in the groove in a matching manner, and two ends of the corrugated pipe are respectively welded and fixed with the first valve seat and the second valve seat. The utility model adopts soft and hard double sealing, can ensure the sealing effect of the ball valve, and can effectively seal by utilizing the metal sealing structure of the first valve seat and the flashboard even if the sealing ring is burnt out when a fire accident occurs in the pipeline, thereby effectively isolating a fire source and ensuring the safety of the pipeline.

Description

Corrugated pipe valve seat soft and hard sealing flat gate valve

Technical Field

The utility model relates to a soft and hard sealing flat gate valve of a corrugated pipe valve seat.

Background

Along with the development of society, along with the rapid development of industries such as modern large-scale machinery, petroleum, chemical industry, new energy, nuclear industry and the like, the requirements on the sealing safety and reliability of the valve are increasingly high.

At present, conventional gate valves are sealed by springs, the pretightening force generated by the springs is unstable, and meanwhile, when a fire disaster occurs, the sealing can fail and cannot block the fire source.

Disclosure of Invention

Aiming at the problems, the utility model provides a corrugated pipe valve seat soft and hard sealing flat gate valve, which effectively solves the problems pointed out in the background technology.

The technical scheme adopted by the utility model is as follows:

the utility model provides a bellows disk seat soft and hard seals flat gate valve, includes valve body, valve gap, flashboard, first disk seat, bellows and second disk seat, form metal seal structure between flashboard and the first disk seat, the flashboard has seted up the slot towards one side of first disk seat, the slot in match be equipped with the sealing washer, the both ends of bellows respectively with first disk seat and second disk seat welded fastening.

The metal sealing structure is a seal formed by the metal sealing surface of the first valve seat and the alloy hard surface of the first valve seat, and is a second seal.

Preferably, the valve body is provided with a safety relief valve.

The safety relief valve can prevent that the pressure in the valve body from being too high in the switching process.

Preferably, the valve body is provided with a positioning block at the bottom end of the valve rod.

Preferably, a bracket and a hand wheel are arranged at the top of the valve cover.

Preferably, the valve cover is provided with a grease injection valve.

Preferably, the valve body and the valve cover are respectively provided with a drain valve.

Preferably, a fire-resistant pad is arranged between the valve body and the valve cover.

Preferably, the sealing ring is a vulcanized rubber sealing ring.

The shutter is made of rubber material through a vulcanized rubber process, so that a first seal is formed.

The utility model adopts the corrugated pipe welded and fixed with the first valve seat and the second valve seat, the pretightening force of the corrugated pipe is utilized to form sealing, and because the elasticity of the corrugated pipe is larger than the medium force, the first valve seat and the second valve seat can resist the forces in two directions, thereby having dual sealing in the true sense.

The safety relief valve is arranged on the valve body, so that the pressure in the valve body is prevented from being too high in the switching process.

Drawings

FIG. 1 is a schematic view of a semi-sectional structure of the present utility model;

fig. 2 is an enlarged view of a portion a in fig. 1.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

Furthermore, in the description of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The utility model will now be described in further detail with reference to the accompanying drawings by means of specific examples.

As shown in fig. 1-2, the corrugated pipe valve seat soft and hard sealing flat gate valve comprises a valve body 1, a valve cover 2, a gate plate 3, a first valve seat 4, a corrugated pipe 5 and a second valve seat 6, wherein a metal sealing structure is formed between the gate plate 3 and the first valve seat 4, a groove is formed in one side of the gate plate 3, which faces the first valve seat 4, a sealing ring 7 is arranged in the groove in a matching manner, and two ends of the corrugated pipe 5 are respectively welded and fixed with the first valve seat 4 and the second valve seat 6.

The valve body 1 is provided with a safety relief valve 8.

The valve body 1 is provided with a positioning block 10 at the bottom end of the valve rod 9.

The top of the valve cover 2 is provided with a bracket 11 and a hand wheel 12.

The valve cover 2 is provided with a grease injection valve 13.

The valve body 1 and the valve cover 2 are provided with drain valves 14.

A fireproof pad 15 is arranged between the valve body 1 and the valve cover 2.

The sealing ring 7 is a vulcanized rubber sealing ring.

The sealing principle of the utility model:

the corrugated pipe 5 welded and fixed with the first valve seat 4 and the second valve seat 6 is adopted, sealing is formed by utilizing the pretightening force of the corrugated pipe 5, and because the elasticity of the corrugated pipe 5 is larger than the medium force, the first valve seat 4 and the second valve seat 6 can resist the force in two directions and have double sealing in the true sense, meanwhile, the groove is formed in the flashboard 3 and the sealing ring 7 is matched with the groove, in the initial state, the first valve seat (4) is pushed by the elasticity of the corrugated pipe 5 to press the flashboard (3), the first sealing is formed by the metal sealing surface of the first valve seat (4) and the sealing ring 7, the second sealing is formed by the metal sealing surface of the first valve seat (4) and the hard alloy of the flashboard (3), and when a fire accident occurs to the pipeline, even if the sealing ring 7 is burnt, the metal sealing structure of the first valve seat 4 and the flashboard 3 can be used for effectively sealing, so that the fire source is effectively isolated, and the safety of the pipeline is ensured.

The utility model arranges the safety relief valve 8 on the valve body 1, thereby preventing the pressure in the valve body 1 from being too high during the switching process.

The utility model has the structural characteristics that:

1. the soft and hard sealing is adopted, and the double sealing can ensure the sealing of the gate valve, so that the gate valve is less prone to leakage than the common single sealing;

2. the flashboard is provided with a groove and matched with vulcanized rubber, and is sealed with the metal valve seat, so that the effectiveness of hard sealing can be ensured even if a soft sealing is lost due to fire, and the flashboard has certain fireproof performance;

3. a barrier is formed between the medium and the body cavity by adopting the corrugated pipe, so that zero leakage of the cavity in the valve body is ensured, and the strictest leakage level requirement is met;

4. the product is suitable for mounting pipelines under various working conditions of petroleum, chemical industry, pharmacy, power industry and the like, and has reliable performance sealing and functions.

The utility model has the technical effects that:

the corrugated pipe valve seat soft and hard sealing design is adopted, the corrugated pipe sealing effect is good, the corrugated pipe valve seat soft and hard sealing structure has the advantage over the conventional valve under the working condition of higher medium requirement, and meanwhile, the corrugated pipe is used for replacing springs with various quantities, so that the pretightening force is more stable.

The valve seat adopts soft and hard sealing design, has good soft sealing effect in the process of normalization, but can also effectively seal when a fire disaster occurs, blocks a fire source, has long service life, is suitable for various working conditions with higher sealing requirements, and improves the experience of users.

Finally, it should be noted that the above list is only specific embodiments of the present utility model. Obviously, the utility model is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present utility model.

Claims (8)

1. The utility model provides a bellows disk seat soft and hard seals flat gate valve, its characterized in that, including valve body (1), valve gap (2), flashboard (3), first disk seat (4), bellows (5) and second disk seat (6), form metal seal structure between flashboard (3) and first disk seat (4), the slot has been seted up in one side towards first disk seat (4) to flashboard (3), the slot in match be equipped with sealing washer (7), the both ends of bellows (5) respectively with first disk seat (4) and second disk seat (6) welded fastening.

2. The flexible and rigid sealing flat gate valve of the corrugated valve seat according to claim 1, wherein the valve body (1) is provided with a safety relief valve (8).

3. The flexible and rigid sealing flat gate valve of the bellows valve seat according to claim 1, wherein the valve body (1) is provided with a positioning block (10) at the bottom end of the valve rod (9).

4. The flexible and rigid sealing flat gate valve for the valve seat of the corrugated pipe according to claim 1, wherein a bracket (11) and a hand wheel (12) are arranged at the top of the valve cover (2).

5. The flexible and rigid sealing flat gate valve of the corrugated valve seat according to claim 1, wherein the valve cover (2) is provided with a grease injection valve (13).

6. The flexible and rigid sealing flat gate valve of the corrugated valve seat according to claim 1, wherein the valve body (1) and the valve cover (2) are provided with drain valves (14).

7. The flexible and rigid sealing flat gate valve for the valve seat of the corrugated pipe according to claim 1, wherein a fireproof pad (15) is arranged between the valve body (1) and the valve cover (2).

8. The flexible and rigid sealing flat gate valve of the bellows valve seat according to claim 1, wherein the sealing ring (7) is a vulcanized rubber sealing ring.