CN201202826Y

CN201202826Y - Gas stop valve

Info

Publication number: CN201202826Y
Application number: CNU200820048947XU
Authority: CN
Inventors: 马军
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-10
Filing date: 2008-06-10
Publication date: 2009-03-04
Anticipated expiration: 2018-06-10

Abstract

The utility model relates to a gas stop valve which comprises a valve body and a valve flap; the valve body is constructed by a three-way pipe; an ring-shaped valve base with the diameter of the valve base less than the diameter of the valve body is arranged in the valve body corresponding to the air inlet pipe end; a seal ring with a n-shaped vertical section is nested on the ring-shaped valve base; a seal plate is mounted on the top end of the valve body; at least a cylinder is arranged on the seal plate; the piston rod of the cylinder is threaded through the seal plate to be connected with the valve flap; the valve flap is driven by the piston rod to have lifting motions relative to the ring-shaped valve base, so as to open and close the airflow channel. The gas stop valve has the advantages of simple structure, stable and reliable application and good sealing effect; the valve flap is made of a metal plate so that the valve flap can not be worn after long time use; the service of the valve flap is prolonged; the connecting flange of the stop valve is constructed by welded angle iron so that the weight is light and the production cost is low.

Description

A kind of gas stop valve

Technical field

The utility model relates to the waste gas treatment equipment field, specifically is a kind of gas stop valve.

Background technique

In waste gas treatment equipment, stop valve is a waste gas treatment equipment commonly used, and its function is the processing gas that is used for connecting or block in the pipeline.At present, often adopt dish formula stop valve in the waste gas recycling equipment, though dish formula stop valve flap is simple in structure, manufacturing and easy to maintenance, but long-time the use easily of butterfly valve worn and torn, and used of a specified duration and the phenomenon that is not closed completely can occur, and sealing is relatively poor, need often maintenance, change, cause acquisition cost, user cost to increase.In addition, existing stop valve, the surface of contact that valve seat cooperates with flap is set to usually than larger area plane, easy like this material or the impurity that produces in the waste gas treatment process is accumulated on this plane, cause the identical imprecision of surface of contact and flap, reduced sealing, and, the connecting flange of stop valve usually and valve body integrally casting and make by machining, its structure is thick and heavy, the cost of production height.

Summary of the invention

The purpose of this utility model is the problem and shortage at above-mentioned existence, and a kind of good sealing effect, good stability, gas stop valve that cost of production is low are provided.

The technical solution of the utility model is achieved in that

A kind of gas stop valve, comprise valve body, flap, valve body is made by three-way pipe, corresponding air inlet pipe end is provided with diameter than valve diameter circlet shape valve seat in the valve body, is nested with the seal ring that the longitudinal section is a n shape on the ring-type valve seat, and shrouding is installed on the valve body top, at least device has a cylinder on shrouding, the piston rod of cylinder passes shrouding and is connected with flap, and flap relative ring-type valve seat under the drive of piston rod is done lifting action, opens or close the gas communication passage.

Further technological scheme of the present utility model is:

For guaranteeing that flap cooperates with valve seat closely, improve the sealing that cooperates between the two, be provided with three cylinders side by side on shrouding, the cylinder in the middle of placing is along the setting of valve body central axis, the intermediate piston bar is fixedlyed connected with flap, and both sides cylinder piston rod and flap are movable conflicts.In the time will closing the circulation of flap barrier gas, make middle cylinder stretch out piston rod earlier by digital control, flap is pressed on the ring-type valve seat, then control the both sides cylinder and stretch out piston rod simultaneously, piston rod is pressed on the flap, increase sealing; Otherwise in the time will opening flap by gas communication, earlier the cylinder both sides piston rod of withdrawing simultaneously in control both sides makes piston rod leave flap, and the intermediate piston bar of withdrawing again makes flap leave the ring-type valve seat, allows gas communication.

Further technological scheme of the present utility model is:

Cause cooperating imprecision for the material that prevents to produce in the waste gas treatment process or impurity accumulate on ring-type valve seat and the fitting surface that flap contacts, reduce sealing, suction tude is a pipe fitting that diameter is littler than valve diameter, one end of suction tude stretches into valve body and the external diameter connecting ring about equally by an internal diameter and suction tude is integral suction tude and valve body soldering and sealing, and the ring-type valve seat is the prolongation that suction tude stretches into valve body.

For alleviating the weight of valve body, reduce production costs, the joining end of valve body adopts the boom angle solid welding to form connecting flange on its outer wall.

For strengthening the sealing that cooperates with valve seat, flap is a metal plate dish.

The utility model is provided with diameter than valve diameter circlet shape valve seat owing to having adopted in valve body, and on the ring-type valve seat, be nested with the seal ring that the longitudinal section is a n shape, adopt the annexation and the method for operation of the piston rod and the flap of a plurality of cylinders simultaneously, assurance the utility model is simple in structure, use reliable and stable, good sealing effect; Flap adopts sheet metal to make, and long-time the use can not worn and not torn, and long service life need not keeped in repair low cost of manufacture; Because the connecting flange of stop valve is welded by angle bar, can alleviate the weight of stop valve greatly again, reduce production costs.

Below in conjunction with accompanying drawing the utility model is further described.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is Fig. 1 partial enlarged drawing;

Fig. 3 is a decomposition texture schematic representation of the present utility model.

Embodiment

As shown in the figure, a kind of gas stop valve of the utility model comprises valve body 1, flap 2, wherein:

Valve body 1 is made by three-way pipe, and corresponding suction tude 11 ends are provided with diameter than valve body 1 diameter circlet shape valve seat 13 in the valve body 1;

Suction tude 11 is that a diameter is than the little pipe fitting of valve body 1 diameter, the one end stretches into valve body 1 and the external diameter connecting ring 6 about equally by an internal diameter and suction tude 11 is integral suction tude 11 and valve body 1 soldering and sealing, the structure of suction tude 11 can also for the pipe fitting of the equal diameters of valve body 1, or the pipe fitting that is connected as a single entity with valve body 1;

Ring-type valve seat 13 stretches into one section pipe ring that valve body 1 prolongs for suction tude 11 the inners, and ring-type valve seat 13 can also be made also solid welding in valve body 1 by an angle bar that curves ring-type;

Being nested with the longitudinal section on the ring-type valve seat 13 is the seal ring 3 of n shape;

Shrouding 4 is installed on valve body 1 top, device has three

cylinders

51,52,53 on shrouding 4, shrouding 4 is provided with the through hole that equates with number of cylinders,

cylinder piston rod

71,72,73 passes through hole and is connected with flap 2, and wherein, the cylinder 52 in the middle of being arranged on is along valve body 1 central axis setting, the piston rod 72 of cylinder 52 is fixedlyed connected with flap 2, the

piston rod

71,73 of both

sides cylinder

51,53 and flap 2 movable conflicts certainly, also can be provided with other cylinders on the shrouding 4;

Flap 2 is a metal plate dish, and the center upper portion position of flap 2 is provided with the contiguous block 21 of fixedlying connected with piston rod 72, and the upper surface periphery of flap 2 is welded with angle bar 22;

The joining end of valve body 1 adopts boom angle 8 solid weldings to form connecting flange on its outer wall.

Working principle of the present utility model is:

Flap 2 relative ring-type valve seat 13 under the drive of piston rod 72 is done lifting action, thereby opens or close the gas communication passage; When needs are closed flap 2 when circulating with barrier gas, cylinder 52 in the middle of making earlier stretches out piston rod 72, and flap 2 is pressed on the ring-type valve seat 13, then controls both

sides cylinder

51,53 and stretches out

piston rod

71,73 simultaneously,

piston rod

71,73 is pressed on the flap 2, the barrier gas circulation;

When needs are opened flap 2 so that during gas communication, control both sides cylinder 51, the 53 both

sides piston rod

71,73 of withdrawing simultaneously makes

piston rod

71,73 leave flap 2, and the intermediate piston bar 72 of withdrawing again makes flap 2 leave ring-type valve seat 13, allows gas communication.

Although the utility model is described with reference to specific embodiment, this description and not meaning that is construed as limiting the utility model.With reference to other variation of description the disclosed embodiments of the present utility model, if all can expect for those skilled in the art, this variation belongs in this claim institute limited range.

Claims

1, a kind of gas stop valve, comprise valve body (1), flap (2), it is characterized in that: described valve body (1) is made by three-way pipe, corresponding suction tude (11) end is provided with diameter than valve body (1) diameter circlet shape valve seat (13) in the valve body (1), be nested with the seal ring that the longitudinal section is a n shape (3) on the ring-type valve seat (13), shrouding (4) is installed on valve body (1) top, at least device has a cylinder (5) on shrouding (4), the piston rod (7) of described cylinder (5) passes shrouding (4) and is connected with flap (2), flap (2) relative ring-type valve seat (13) under the drive of piston rod (7) is done lifting action, thereby opens and closes the gas communication passage.

2, gas stop valve according to claim 1, it is characterized in that: shrouding (4) is provided with three cylinders (51,52,53) side by side, cylinder (52) in the middle of placing is along valve body (1) central axis setting, the piston rod (72) of cylinder (52) is fixedlyed connected with flap (2), and the piston rod (71,73) of both sides cylinder (51,53) is conflicted with flap (2) is movable.

3, gas stop valve according to claim 2, it is characterized in that: flap (2) is a metal plate dish, the center upper portion position of described flap (2) is provided with the contiguous block (21) of fixedlying connected with piston rod (72), and the upper surface periphery of flap (2) is welded with angle bar (22).

4, gas stop valve according to claim 1 and 2, it is characterized in that: suction tude (11) is that a diameter is than the little pipe fitting of valve body (1) diameter, one end of described suction tude (11) stretches into valve body (1) and also by the external diameter connecting ring (6) about equally of an internal diameter and suction tude (11) suction tude (11) and valve body (1) soldering and sealing is integral, and ring-type valve seat (13) stretches into the prolongation of valve body (1) for suction tude (11).

5, gas stop valve according to claim 1 is characterized in that: the joining end of valve body (1) adopts boom angle (8) solid welding to form connecting flange on outer wall.