CN203176382U

CN203176382U - Fireproof butterfly valve

Info

Publication number: CN203176382U
Application number: CN 201320186082
Authority: CN
Inventors: 刘鸿儒; 刘政
Original assignee: PENGHAN MACHINERY (SUZHOU) CO Ltd
Current assignee: PENGHAN MACHINERY (SUZHOU) CO Ltd
Priority date: 2013-04-15
Filing date: 2013-04-15
Publication date: 2013-09-04
Anticipated expiration: 2023-04-15

Abstract

The utility model discloses a fireproof butterfly valve which solves the problem that the airtightness of butterfly valves is deteriorated after pipelines are on fire. The fireproof butterfly valve mainly comprises a valve body, a valve rod, a valve clack and valve bases, wherein the valve rod is installed on the valve body, the valve clack is fixed inside a valve cavity of the valve body through the valve rod and can rotate around the valve rod, sealing grooves are formed in positions of the valve body, which are located at two ends of a diameter of a valve cavity opening, respectively, the valve bases are located inside the sealing grooves of the valve body and closely attached to the valve clack, a fireproof plate is installed inside each sealing groove, the fireproof plates are closely attached to the ends of the valve bases, which are close to the valve cavity, valve base pressing rings are arranged between the ends of the valve bases, which are far away from the valve cavity, and the valve body in an extruding mode, and fireproof plate pressing rings are arranged between the fireproof plates and the valve base pressing rings in an extruding mode. In the case of a fire, the valve clack is closely attached to the fireproof plates to achieve sealing, and emergency sealing can be achieved under the emergency condition that the pipeline is on fire, so that the inflaming retarding effect is achieved.

Description

A kind of fire prevention butterfly valve

Technical field

The utility model relates to a kind of valve, is specifically related to a kind of fire prevention butterfly valve.

Background technique

The flap of butterfly valve is disk, and flap is installed on the diametric(al) of valve pocket mouth.In the butterfly valve body cylindrical channel around himself axis rotation, thereby reach the purpose that opens and closes or regulate, its angle of swing is that when rotation was spent to 90, valve was in full-gear between 0 degree-90 degree.Butterfly valve structure is simple, and volume is little, and simple to operate, can fast opening and closing, have good fluid control ability.

Butterfly valve is often on the pipeline for delivery of various flowing mediums such as coal gas, rock gas, liquefied petroleum gas (LPG), town gas, cold and hot air, and these flowing mediums are inflammable and explosive material often.But do not have effective fire resisting construction on the present butterfly valve, in case catch fire in the pipeline, butterfly valve seal will variation, and inflammable medium can be revealed from butterfly valve, causes the fire that pipeline is outer, can cause very big loss.

The model utility content

For solving the problems of the technologies described above, the utility model provides a kind of fire prevention butterfly valve, its objective is in pipeline, catch fire after, butterfly valve can also have good sealing, the medium in the pipeline can not leak from butterfly valve.

For achieving the above object, the technical solution of the utility model is as follows:

A kind of fire prevention butterfly valve, comprise valve body, valve rod, flap and valve seat, described valve rod is installed on the valve body, described flap is fixed in the valve pocket of valve body and can rotates around valve rod by valve rod, described valve body is respectively equipped with a sealed groove at diameter two ends of valve pocket mouth, respectively is provided with a described valve seat in the described sealed groove, and described valve seat is close to described flap setting, it is characterized in that: be equiped with a fireproof plate in the described sealed groove, and described fireproof plate is close to the nearly valve pocket end installing of described valve seat.

Preferably, extruding is provided with a valve seat pressure ring between the valve pocket end far away of described valve seat and the described valve body.

Preferably, be extruded with the fireproof plate pressure ring between described fireproof plate and the described valve seat pressure ring.

Preferably, described flap is provided with the even surface that matches with the sealing surface of described valve seat.

Preferably, described fireproof plate is provided with Graphite pad.

Preferably, described fireproof plate is dull and stereotyped loop configuration, and its thickness is 1mm.

By above technological scheme, a kind of fire prevention butterfly valve described in the utility model, before catching fire, flap seals by pushing valve seat and being close to fireproof plate; After catching fire, flap seals by being close to fireproof plate, can promptly seal under the contingency condition that pipeline catches fire, and to reach fire-retardant effect, can not result in greater loss.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below.

Fig. 1 is the sectional view of the disclosed a kind of butterfly valve of preventing fires of the utility model embodiment;

Fig. 2 is the enlarged view at the I place before Fig. 1 does not catch fire among the utility model embodiment;

Fig. 3 is the enlarged view at the I place after Fig. 1 catches fire among the utility model embodiment.

The represented corresponding part title of numeral among the figure:

1. valve body 2. valve rods 3. flaps 4. valve seats 5. fireproof plates

6. valve seat pressure ring 7. fireproof plate pressure rings 8. Graphite pads

Embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who obtains under the creative work prerequisite, all belong to the scope of the utility model protection.

The utility model provides a kind of fire prevention butterfly valve, and its principle is to have increased fireproof plate on the original basis of butterfly valve, makes pipeline catch fire after the valve seat fusing, and flap still can be close to fireproof plate, keeps the butterfly valve good sealing property.

Embodiment:

In conjunction with Fig. 2, shown in Figure 3, a kind of fire prevention butterfly valve comprises valve body 1, valve rod 2, flap 3 and valve seat 4 by Fig. 1; Valve rod 1 is installed on the valve body 2, and flap 3 is fixed in the valve pocket of valve body 1 and can rotates around valve rod 2 by valve rod 2; Valve body 1 is respectively equipped with a sealed groove at diameter two ends of valve pocket mouth; Valve seat 4 is in the sealed groove of valve body 1, and flap 3 is provided with the even surface that matches with the sealing surface of valve seat 4, can make valve seat 4 be close to flap 3; Be equiped with a fireproof plate 5 in the sealed groove, it is close to the nearly valve pocket end of valve seat 4, and fireproof plate 5 is dull and stereotyped loop configuration, and its thickness is 1mm, and fireproof plate 5 is provided with Graphite pad 8; Extruding is provided with a valve seat pressure ring 6 between the valve pocket end far away of valve seat 4 and the described valve body 1; Extruding is provided with fireproof plate pressure ring 7 between fireproof plate 5 and the valve seat pressure ring 6.Before catching fire, flap 3 is by extruding valve seat 4 and be close to fireproof plate 5, and butterfly valve is sealed; After catching fire, valve seat 4 is subjected to high temperature and can melts, flap 3 just seals by being close to fireproof plate 5, again because installed pyrographite pad 8 at fireproof plate 5, Graphite pad 8 has good heat-conducting property, and under the state of catching fire, fireproof plate 5 can not lose efficacy, guaranteed the reliability of sealing between fireproof plate 5 and the flap 3, medium can not overflow butterfly valve by the slit of metal parts.

A kind of fire prevention butterfly valve of the present utility model only needs several fireproof plates 5 are installed in the sealed groove of common butterfly valve body 1, just can play good seal action under the state that catches fire, and makes ducted medium can not overflow from butterfly valve.And fireproof plate 5 is dull and stereotyped loop configuration, and thickness is 1mm, shapes very easyly, has saved the existing common metal press tool of using, and has significantly reduced cost of production; Graphite pad 8 has good heat-conducting property, and it is installed on the fireproof plate 5, and under the situation of catching fire, fireproof plate 5 is subjected to high temperature, also can not lose efficacy, and butterfly valve just keeps excellent sealing performance like this, can not result in greater loss.

To disclosed a kind of butterfly valve embodiment's that prevents fires above-mentioned explanation, make related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from spirit or scope of the present utility model in other embodiments herein.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.

Claims

1. fire prevention butterfly valve, comprise valve body, valve rod, flap and valve seat, described valve rod is installed on the valve body, described flap is fixed in the valve pocket of valve body and can rotates around valve rod by valve rod, described valve body is respectively equipped with a sealed groove at diameter two ends of valve pocket mouth, respectively is provided with a described valve seat in the described sealed groove, and described valve seat is close to described flap setting, it is characterized in that: be equiped with a fireproof plate in the described sealed groove, and described fireproof plate is close to the nearly valve pocket end installing of described valve seat.

2. a kind of fire prevention butterfly valve according to claim 1 is characterized in that: push between the valve pocket end far away of described valve seat and the described valve body and be provided with a valve seat pressure ring.

3. a kind of fire prevention butterfly valve according to claim 2 is characterized in that: be extruded with the fireproof plate pressure ring between described fireproof plate and the described valve seat pressure ring.

4. a kind of fire prevention butterfly valve according to claim 1, it is characterized in that: described flap is provided with the even surface that matches with the sealing surface of described valve seat.

5. a kind of fire prevention butterfly valve according to claim 1, it is characterized in that: described fireproof plate is provided with Graphite pad.

6. a kind of fire prevention butterfly valve according to claim 1, it is characterized in that: described fireproof plate is dull and stereotyped loop configuration, and its thickness is 1mm.