CN1673587A

CN1673587A - Double-spile cut off valve for large-bore gas-delivering pipeline

Info

Publication number: CN1673587A
Application number: CN 200510012436
Authority: CN
Inventors: 邢毅栋
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-08
Filing date: 2005-04-08
Publication date: 2005-09-28
Anticipated expiration: 2025-04-08
Also published as: CN1313751C

Abstract

The double insert plate isolating valve for large aperture gas pipeline has the structure including frame, valve seat, fixed valve body with protruding middle part, movable valve body and valve box connected to protruding middle part. The hidden plate lifting mechanism supported on the valve box is connected via valve rod to the hidden insert plate capable of blocking the fixed valve body. The movable valve body has its middle part connected to a corrugated pipe and its outer frame connected to a movable valve body controlling fastening mechanism. The outer plate lifting mechanism on the frame is connected via connecting part to outer insert plate inserted between two valve bodies. The present invention may be used to replace the combined structure of butterfly valve and double goggle valve for large aperture gas pipeline, and has simple operation, short control period, fast speed, low cost and reduced operation platform length.

Description

Double-spile cut off valve for large-bore gas-delivering pipeline

Technical field

The present invention relates to a kind of valve valve, specifically a kind of double-spile cut off valve for large-bore gas-delivering pipeline with smooth seal face.

Background technique

The valve that is used to cut off coal gas on the heavy caliber gas pipeline of industries such as iron and steel, metallurgy, coking normally has two: the butterfly valve in front, the glasses valve in back.During use, be to close butterfly valve earlier, ducted coal gas is blocked in a large number; And then close glasses valve, ducted coal gas is blocked fully.The shortcoming that this double valve is provided with, the one, the on-the-spot operating platform of being built is big, the cost height.Because operating platform should be built the bottom of two valves in, but also to build the intermediate portion of the two in.This just makes operating platform that length about 10 meters generally will be arranged.The 2nd, valve cost height.Two valves are independent separately, have an integral body of one's own, and the explosion-proof control system of a cover (manually), overall cost height are respectively arranged.The 3rd, the valve opening and closing duration.Because the keying of two valves need be controlled respectively and operate, thereby holding time is longer.Particularly having under the excessive situation of pipeline residual coal gas, the lengthening of operating time has directly increased the unsafe factor in the valve operation process undoubtedly, constitutes accident potential.

Summary of the invention

Purpose of the present invention just provides a kind of double-spile cut off valve for large-bore gas-delivering pipeline, to overcome the defective that existing double valve fit form exists, realizes that safety, quick and easy use need.

The present invention be achieved in that double-spile cut off valve for large-bore gas-delivering pipeline be on frame, be fixed with valve seat relative decide valve body and moving valve, decide the middle part evagination of valve body, the top of lug boss is communicated with clack box.The dark plate that but valve body is decided in shutoff in submerged plate elevator mechanism that connects by stent support on clack box top and the clack box joins by valve rod.Middle part at moving valve is connected with bellows, is connected to the clamping and release mechanism of control moving valve on the outside frame of moving valve.The isotropic disk elevator mechanism that connects at upper rack joins by the link and the bright plate that can be plugged between two valve body and valve seats.

Decide lug boss on the valve body in the two plate isolating valves of the present invention, make and decide reducer of valve inner generation that the reducing plane relative with dark plate promptly constitutes the interior sealing surface of seat of deciding valve body.When dark plate drops to when deciding in the valve body from clack box under submerged plate elevator mechanism control, dark plate and interior valve seat fit, and seal and decide valve body, thereby ducted a large amount of coal gas is blocked substantially.In the time of in dark plate is thus lifted to the top clack box, decides valve body and be opening state.Because decide the housing that valve body, clack box etc. have been formed a sealing, thereby secretly plate is in the ascending, descending process of opening or closing, ducted coal gas all can be to external leakage.

Moving valve in the two plate isolating valves of the present invention makes the valve seat end under the clamping and release mechanism controls owing to the middle part connects bellows, and an amount of stretching can be arranged.When the valve seat of moving valve directly compresses applying with the valve seat of deciding valve body, be the opening state of moving valve.When moving valve under the clamping and release mechanism controls, the retraction certain distance, bright plate is under isotropic disk elevator mechanism control, insert and decide between valve body and the moving valve, clamping and release mechanism is reverse operation again, and bright plate is compressed when being fitted between two valve seats, is the shutoff closed state of moving valve.Ducted coal gas can be cut off fully, nothing leaks outside.

Key points in design of the present invention is: on a valve, be provided with two plates of light and dark, by dark plate with decide valve body in the cooperating of interior valve seat, ducted coal gas is blocked substantially; By cooperating of the valve seat between bright plate and moving, fixed two valve bodies, ducted coal gas is cut off fully.Two functions of original butterfly valve and two valves of glasses valve have so just been realized by a valve.Its advantage is: the one, and dark plate enters in the upper valve case after promoting, not in deciding valve body, and the interior sealing surface of seat of deciding valve body media flow direction dorsad, so seldom by ducted medium erosive wear, thereby the sealability that can make this part keeps permanent, the working life of having improved this pair plate isolating valve.The 2nd, owing to realized uniting two into one of valve, thereby only need dispose the explosion-proof control system of a cover (manually), and saved the use of the corresponding duplicate components of two valves, simplify the structure, make the comprehensive manufacture cost of valve reduce.The 3rd, the keying transfer process of this valve is to be realized by an action of overlapping two plates of control system control, control respectively with respect to original two valves, programmed sequence of operations is simplified, control time shortens, switching speed obviously improves, reduce unsafe factor, helped safety in production, realized safe, quick and easy use needs.The 4th, this single on-off control valve is installed behind the door in the production scene of heavy caliber gas pipe line, the laying length of operating platform is can corresponding minimizing over half, has both reduced the platform occupation area, has reduced the platform cost again.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the right elevation of Fig. 1.

Fig. 3 is the left view of Fig. 1.

Fig. 4, Fig. 5 are the partial enlarged drawings that bright plate cooperates with two valve body and valve seats among the present invention.

Embodiment

As Fig. 1, shown in Figure 3, the frame 4 of the two plate isolating valves of the present invention is vertical cube frame structure, and valve body 6 is decided in left side, its underpart, and the right side is moving valve 16 fixedly.There is the lug boss of evagination at the middle part of deciding valve body 6, and valve seat 10 in the inside left reducing place of lug boss forms is embedded with O-ring seal.Top seal at this lug boss is connected with clack box 5, and clack box 5 tops are connected to support 13, and submerged plate elevator mechanism 3 is installed in the support upper end.Be positioned at the last termination valve rod 11 of the circular dark plate 8 of clack box 5.The top of valve rod 11 passes the suitable for reading of clack box 5, is connected with submerged plate elevator mechanism 3.At the filling body 14 that is sealed with suitable for reading of clack box 5, to seal the suitable for reading of clack box 5.Submerged plate elevator mechanism 3 drives dark plate 8 at the clack box 5 of sealing with decide to move up and down in the valve body 6 by valve rod 11.

As shown in Figure 1 and Figure 2, connect bellows 17 at moving valve 6 middle parts, clamping and release mechanism 1 is contained on the frame 4 of moving valve periphery, with an amount of the stretching of control moving valve 6 valve seat ends.On frame 4 tops isotropic disk elevator mechanism 12 is installed, the bottom articulates bright plate 2.Bright plate 2 is positioned at the top of two valve seat joints.When moving valve 16 controlled retractions, and after deciding to get out of the way a slit between the valve seat of valve body 6, bright plate can controlled decline, inserts between two

valve seats

7,18.

For guaranteeing

bright plate

2 and 7,18 reliable sealings after compressing applying of two valve seats, be respectively equipped with the O-ring seal 19 (Fig. 4) of diameter on the two sides of bright plate 2 greater than valve block internal diameter.Can realize the reliable sealing of bright plate and two valve base chambers like this, guarantee that valve closes the zero leakage of having no progeny.And the replacing of the O-ring seal on the bright plate then can be carried out after it is lifted out valve body.

Shown in Fig. 4,5, in the two plate push-pull valves of the present invention, decide the external diameter of the external diameter of two relative valve seats on valve body 6 and the moving valve 16 greater than bright plate 2, be laid with the O-ring seal 20 of diameter therein on the sealing surface of a valve seat greater than bright plate external diameter.Owing on the sealing surface of seat of valve body, be embedded with O-ring seal 20, thereby can have guaranteed the reliable sealing of gap after compressing applying of two sealing surface of seats.

In addition, because the external diameter of two

valve seats

7,18 is greater than the external diameter of bright plate 2, therefore after bright plate is clipped between two valve seats, will form an annular groove, and the diameter that will embed has all exposed greater than the O-ring seal 20 of bright plate external diameter on sealing surface of seat.As long as put in the outer ring of bright plate 2 in advance the O-ring seal 20 of a standby replacing ', just can change when needed the O-ring seal on the sealing surface of seat 20.Because this moment, the valve seat and the blind hole valve plate of two valve bodies all kept compressing sealing state, there is not gas leakage, so can change the operation of O-ring seal fool proof, easily.Realized push-pull valve timely replacing of used O-ring seal when opening under turn-offing cut-off state thus.Under this particular case, also just therefore can save the through hole valve plate that must dispose in the common spectacles valve.Because saving of through hole valve plate, the structure of the traditional eyewear valve of feasible configuration through hole valve plate and this bivalve plate structure of blind hole valve plate is simplified, and also therefore can apply it in this isolating valve, form the isolating valve of two plates, two functions, feasible imagination with an isolating valve replacement dish valve, two valves of push-pull valve becomes possibility.

Bright plate 2 in the two plate isolating valves of the present invention can be a circular plate body, connecting rod or connecting plate that welded top can be connected with isotropic disk elevator mechanism 12.The another kind of structure of bright plate 2 is that valve circle top is fishplate bar (or connecting plate) 2c in succession at the inboard sealing-in central layer of annular valve circle 2a 2b, and the top of connecting plate and isotropic disk elevator mechanism 12 join.On central layer 2b, also can weld several and strengthen gusset, to improve the anti-crawl agentdefiection degree of bright plate.Like this, the overall weight of bright plate just can significantly descend, and saves rolled steel dosage.

On the architecture basics of above-mentioned various pairs of plate isolating valves, as shown in Figure 1, the lifting position place at 2 liang of edges of bright relatively plate is provided with guide mechanism 15 on frame 4.Bright plate 2 is moved up and down along guide mechanism 15, avoid because of skew or rock etc. former thus with the touching of valve seat, make the damage of avoiding colliding with of the O-ring seal 19 on bright plate 2 two sides.

Clamping and release mechanism 1 among the present invention, submerged plate elevator mechanism 3, isotropic disk elevator mechanism 12, filling body 14 and guide mechanism 15 etc. all can adopt structure member corresponding on existing open type glasses valve and the closed push-pull valve to form; Also can adopt the CN01219859.5 number corresponding structure parts in " vertical glasses valve " patent to make.

For improving 8 pairs of exclusion seal of deciding valve body 6 of dark plate, as shown in Figure 1, be respectively equipped with the relative pressure strip in several inclined-planes 9 at the edge, the right side of dark plate 8 and the relative right inner face of the lug boss of deciding valve body 6.This structure is same as the automatic compressing structure of valve plate of " pressure strip " in CN03200242.4 number " totally-enclosed lock formula coal gas blank-plate valve " patent.Inclined-plane by the pressure strip 9 relative with array inclined-plane on dark plate 8 edges of edge in valve body 6 lug bosses cooperates, make dark plate 8 descending in the process of position, by ejection simultaneously automatically to the interior valve seat 10 of deciding valve body 6, thereby the cutting off seal performance of dark plate 8 is significantly improved.

Claims

1, a kind of double-spile cut off valve for large-bore gas-delivering pipeline, it is characterized in that being on frame (4), being fixed with valve seat relative decide valve body (6) and moving valve (16), decide the middle part evagination of valve body (6), the top of lug boss is communicated with clack box (5); Clack box (5) top by support (13) support and connection submerged plate elevator mechanism (3) but with clack box in the shutoff dark plate (8) of deciding valve body join by valve rod (11); Connect bellows (17) at moving valve (16) middle part, be connected to the clamping and release mechanism (1) of control moving valve on the outside frame; The isotropic disk elevator mechanism (12) that connects on frame (4) top joins by the link and the bright plate (2) that can be plugged between two valve body and valve seats.

2, double-spile cut off valve for large-bore gas-delivering pipeline according to claim 1 is characterized in that being respectively equipped with on the two sides of bright plate (2) O-ring seal (19) of diameter greater than valve block internal diameter.

3, double-spile cut off valve for large-bore gas-delivering pipeline according to claim 2, it is characterized in that deciding the external diameter of the external diameter of valve body (6) and the last two relative valve seats of moving valve (16), be laid with the O-ring seal (20) of diameter therein on the sealing surface of a valve seat greater than bright plate external diameter greater than bright plate (2).

4, double-spile cut off valve for large-bore gas-delivering pipeline according to claim 3, it is characterized in that bright plate (2) is at the inboard sealing-in central layer of annular valve circle (2a) (2b), valve circle top is fishplate bar (2c) in succession, and the top of connecting plate and isotropic disk elevator mechanism (12) join.

5,, it is characterized in that the lifting position place at bright relatively plate two edges on frame (4) is provided with guide mechanism (15) according to claim 1,2,3 or 4 described double-spile cut off valve for large-bore gas-delivering pipeline.

6,, it is characterized in that being respectively equipped with the relative pressure strip in inclined-plane (9) at the edge of dark plate (8) and the relative inner face of the middle part projection of deciding valve body (6) according to claim 1,2,3 or 4 described double-spile cut off valve for large-bore gas-delivering pipeline.