CN201202822Y

CN201202822Y - Gas butterfly valve

Info

Publication number: CN201202822Y
Application number: CNU2008200704777U
Authority: CN
Inventors: 王学军
Original assignee: 杨元才
Priority date: 2008-05-12
Filing date: 2008-05-12
Publication date: 2009-03-04
Anticipated expiration: 2018-05-12

Abstract

Disclosed is a fuel butterfly valve which belongs to the gas cut-off valve and comprises a valve body, two valve plates, an upper valve shaft, a lower valve shaft and a driving device; support frames and wedge blocks matched with the valve plates are arranged on the upper valve shaft and the lower valve shaft. A sealing ring made of metal material is arranged in the valve body; the valve is applicable to the higher temperature working environment with the temperature of about 450 DEG C; the blade-shaped hard seal enables the sealed surface to have the automatic cleaning function; the two sealed surfaces can realize bidirectional seal for the channel and ensure the seal to be tighter; when the butterfly valve is opened, the valve plates are separated from the sealing ring completely to realize the complete opening of the valve and ensure the sealing ring to have no abrasion so that the service life of the sealing ring is prolonged. The sealing part facilitates realizing the standardization, has good exchangeability and convenient maintenance; meanwhile, the electric control and hydraulic control are combined to realize the automatic operation, so as to enable people to be away from the harmful gas and realize the efficient and safe production.

Description

A kind of Gas fuel butterfly valve

Technical field

The utility model belongs to valve, relates generally to a kind of Gas fuel butterfly valve that is used for shut off gas.

Background technique

On the industrial combustion gas pipeline, when needs carry out the pipeline maintenance, must close the valve on the upstream line, cut off the combustion gas of fed downstream pipeline, to guarantee maintainer's personal safety.Therefore, be installed in the valve that is used for shut off gas on the pipeline, require necessary reliable performance, good seal.At present, what use in this class pipeline generally is blank-plate valve, the working principle of blank-plate valve is to open or close valve by moving horizontally of plane valve plate, can can satisfy the reliable requirement of cutting off gas substantially, but blank-plate valve can cause a large amount of combustion gas to external leakage when open and close, not only jeopardize equipment operating personnel's safety on every side, also cause very big waste.Patent 02214794.2 provides " a kind of new gas cut-off valve ", belong to Water Seal Gate Valves, its working principle is the effect promotion valve plate by valve shaft and voussoir, make valve plate be pressed on the suction port of valve body or break away from suction port to open or close valve, and water filling is overflowed to avoid gas in body cavity.This class valve can cut off gas more reliably, but also the same with other valve some significantly deficiencies that exist: the one, adopt rubber seal, be only applicable to temperature and be not higher than 120 ℃ pipeline; The 2nd, most of combustion gas medium all contains a large amount of impurity (as the coal tar wet goods), and these impurity are easy to be deposited on the sealing surface, and the leakage that causes valve to cause because of being not closed completely directly injures downstream maintainer's personal safety.

Summary of the invention

The purpose of this utility model provides and a kind ofly can be applicable to the valve that is used for shut off gas that self-cleaning function is arranged than elevated operating temperature and sealing surface.

For reaching above-mentioned purpose, the technical solution adopted in the utility model is: this Gas fuel butterfly valve comprises valve body, is arranged on valve plate, valve shaft that is connected with valve plate in the valve body and the drive unit that is connected with valve shaft, described valve plate is to be symmetrical in two valve plates that valve shaft is provided with, valve plate contacts with seal ring on being fixed on valve body, inner side surface at two valve plates is respectively arranged with connecting plate, and valve shaft is provided with the voussoir that matches with connecting plate; Described drive unit comprises Electric actuator and hydraulic pressure installation, and Electric actuator, hydraulic pressure installation and valve shaft are connected to each other.

Described valve shaft is upper and lower two valve shafts, is respectively arranged with upper and lower voussoir on upper and lower valve shaft, is symmetrically arranged with upper and lower connecting plate respectively at the inner side surface of two valve plates, and the voussoir on the upper and lower valve shaft matches with upper and lower connecting plate respectively; Upper and lower two valve shafts are connected by supporting frame, have been horizontally disposed with guiding groove in the central position of each valve plate, and supporting frame matches with guiding groove; The upper and lower connecting plate of each valve plate is symmetricly set on the both sides of guiding groove.

Described connecting plate comprises and connects base plate and be arranged on hook plate and the swash plate that connects on the base plate, and the voussoir on upper and lower two valve shafts matches with hook plate and swash plate on the pairing connecting plate respectively; Support frame as described above comprise the top board that is separately fixed at upper and lower valve shaft axle head, respectively be hinged on the connecting rod at top board two ends and respectively symmetry be hinged on crosshead shoe on the connecting rod, crosshead shoe matches with guiding groove.

Described guiding groove is made up of the gib block of two secured in parallel on valve plate, and the top board on the support frame as described above is the I-shaped plate that has mesopore, and an end face of top board contacts with upper and lower voussoir.

On upper and lower valve shaft, also be respectively arranged with block; The top of last valve shaft is connected with the output shaft of oil hydraulic cylinder in the hydraulic pressure installation by joint, and the output shaft of oil hydraulic cylinder is connected with Electric actuator.

Seal ring is by being bolted on the valve body, gib block and connecting plate are respectively by being bolted on the valve plate, upper and lower voussoir is fixed on the upper and lower valve shaft by locking nut respectively with top board, and the hook plate on the connecting plate is welded on respectively with swash plate and is connected on the base plate.

Owing in valve body, adopted the seal ring of all-metal material, make the working environment of valve, and obturator is beneficial to the realization standardization applicable to 450 ℃ of left and right sides higher temperatures, interchangeability is strong, is convenient to maintenance.Again because the sealing surface of valve plate and with seal ring that it matches between seal firmly for the cutting edge shape, the sealing sword can be cut into impurity inside in contacted process, realize closely cooperating between valve plate and the seal ring, thereby offset or reduce the impurity that is deposited on the sealing surface, make sealing tighter the influence that sealing effect produces.In addition, two sealing surfaces of two valve plates can be realized two way sealed to pipeline, and are easy for installation.Valve plate and seal ring broke away from fully when this Gas fuel butterfly valve was opened, and can fully open and made sealing surface not have wearing and tearing, had prolonged working life.Adopt electronic and hydraulic combined control simultaneously, automated job makes the people away from harmful gas, has realized safe and efficient production.

Description of drawings

Fig. 1 is the internal structure schematic representation of Gas fuel butterfly valve;

Fig. 2 is the partial enlarged drawing of valve plate and seal ring contact position;

Fig. 3 is the structural representation of valve shaft parts;

Fig. 4 is the plan view of Fig. 3;

Fig. 5 is the structural representation of valve plate;

Fig. 6 is the plan view of Fig. 5;

Fig. 7 is the structural representation of crosshead shoe;

Fig. 8 is the structural representation of top board.

Embodiment

This Gas fuel butterfly valve comprises valve body 3, is arranged on valve plate 5, valve shaft that is connected with valve plate in the valve body and the drive unit that is connected with valve shaft, and described drive unit comprises Electric actuator and hydraulic pressure installation, and Electric actuator, hydraulic pressure installation and valve shaft are connected to each other.Described valve plate 5 is to be symmetrical in two valve plates that valve shaft is provided with, two valve plates respectively be fixed on valve body 3 on two seal rings 4 contact, seal ring 4 is made by cemented carbide, the cutting edge shape side of seal ring 4 matches with the sealing surface of valve plate 5, the sealing sword can be cut into impurity inside in the process that helps compressing after closing, and guarantees sealing effect.Inner side surface at two valve plates 5 is respectively arranged with connecting plate, and valve shaft is provided with the voussoir 6 that matches with connecting plate.Described valve shaft is upper and lower two valve shafts, and the top of last valve shaft 9 is connected with the output shaft of oil hydraulic cylinder 12 in the hydraulic pressure installation by joint 11, and the output shaft of oil hydraulic cylinder 12 is connected with Electric actuator 13 again.Electric actuator 13, oil hydraulic cylinder 12 are connected with valve body 3 by support 10.Hydraulic pressure installation can drive voussoir 6 by upper and lower two valve shafts and move with stretching or unclamp valve plate 5, and Electric actuator can drive valve plates 5 rotations to open or throttle down by the voussoir on upper and lower two valve shafts 6.Be respectively arranged with upper and lower voussoir 6 on upper and lower valve shaft, be symmetrically arranged with upper and lower connecting plate respectively at the inner side surface of two valve plates 5, the voussoir on the upper and lower valve shaft matches with upper and lower connecting plate respectively.Upper and lower two valve shafts are connected to each other by supporting frame, are provided with horizontal guide slot 18 in the central position of each valve plate 5, and supporting frame matches with guiding groove 18, and the upper and lower connecting plate of each valve plate 5 is symmetricly set on the both sides of guiding groove 18.In the present embodiment, described guiding groove 18 is made up of the gib block of two secured in parallel on valve plate 5, described connecting plate comprises and connects base plate 15 and be arranged on hook plate 16 and the swash plate 17 that connects on the base plate, and the voussoir 6 on upper and lower two valve shafts matches with hook plate 16 and swash plate 17 on the pairing connecting plate respectively; Support frame as described above comprise the top board 8 that is separately fixed at upper and lower valve shaft axle head, respectively be hinged on the connecting rod 14 at top board two ends and respectively symmetry be hinged on crosshead shoe 7 on the connecting rod, the cross on the crosshead shoe 7 is foxy to match with guiding groove 18.An end face of supporting frame top board 8 contacts with upper and lower voussoir 6, and upper and lower voussoir 6 is fixed on the adjacent axle head of upper and lower valve shaft respectively with top board 8 by locking double nut symmetry.In order to gain in strength, the top board 8 on the supporting frame is the I-shaped plates that have mesopore, and crosshead shoe 7 is set to connecting rod 14 to be clamped in middle double layer construction with the termination that connecting rod 14 is hinged.The effect of supporting frame is to drive lower valve shaft 1 and last valve shaft 9 same moved further by the horizontal slip in guiding groove 18, thereby make the voussoir 6 on the upper and lower valve shaft or unclamp valve plate 5, or drive valve plate 5 rotations to open or throttle down by hook plate 16 by swash plate 17 stretchings.On upper and lower valve shaft, also be respectively arranged with the block 2 that limits the valve plate upper-lower position.In the present embodiment, seal ring 4 is by being bolted on the valve body 5, and by being bolted on the valve plate 5, the hook plate 16 on the connecting plate is welded on respectively with swash plate 17 and is connected on the base plate 15 respectively for gib block and connecting plate.

In addition, guiding groove 18 can not use gib block and directly slot on valve plate 5; Hook plate 16 on the connecting plate can directly be fixed by bolts on the valve plate 5 with being connected base plate 15 together with swash plate 17, maybe will connect base plate 15 and also be welded on the valve plate 5; In addition, under the enough condition of proof strength, top board 8 and the connecting end that crosshead shoe 7 is connected with connecting rod 14 respectively also can be set to individual layer.

Its working principle is:

During valve open, under the manipulation of Electric actuator, oil hydraulic cylinder drives voussoir by last valve shaft and moves to the valve body two ends, and voussoir breaks away from the swash plate on the connecting plate and matches with hook plate, drives two valve plates and draws in to the centre, breaks away from seal ring.Electric actuator is handled valve plate again and is rotated counterclockwise 90 °, makes valve plate parallel with conduit axis, valve open.

Reverse operating during valve closing, Electric actuator drives valve plate earlier and turns clockwise 90 °, make valve plate vertical with conduit axis, the operating hydraulically operated again cylinder of Electric actuator drives voussoir by last valve shaft and moves in the middle of valve body, the hook plate that voussoir breaks away from the connecting plate matches with swash plate, valve plate is strutted to both sides, the sealing surface of valve plate and seal ring are compressed, realize closing fully of valve.

Claims

1, a kind of Gas fuel butterfly valve, comprise valve body, be arranged on valve plate, valve shaft that is connected with valve plate in the valve body and the drive unit that is connected with valve shaft, it is characterized in that: described valve plate is to be symmetrical in two valve plates that valve shaft is provided with, valve plate contacts with seal ring on being fixed on valve body, inner side surface at two valve plates is respectively arranged with connecting plate, and valve shaft is provided with the voussoir that matches with connecting plate; Described drive unit comprises Electric actuator and hydraulic pressure installation, and Electric actuator, hydraulic pressure installation and valve shaft are connected to each other.

2, Gas fuel butterfly valve according to claim 1, it is characterized in that: described valve shaft is upper and lower two valve shafts, on upper and lower valve shaft, be respectively arranged with upper and lower voussoir, inner side surface at two valve plates is symmetrically arranged with upper and lower connecting plate respectively, and the voussoir on the upper and lower valve shaft matches with upper and lower connecting plate respectively; Upper and lower two valve shafts are connected by supporting frame, have been horizontally disposed with guiding groove in the central position of each valve plate, and supporting frame matches with guiding groove; The upper and lower connecting plate of each valve plate is symmetricly set on the both sides of guiding groove.

3, Gas fuel butterfly valve according to claim 2, it is characterized in that: described connecting plate comprises and connects base plate and be arranged on hook plate and the swash plate that connects on the base plate, and the voussoir on upper and lower two valve shafts matches with hook plate and swash plate on the pairing connecting plate respectively; Support frame as described above comprise the top board that is separately fixed at upper and lower valve shaft axle head, respectively be hinged on the connecting rod at top board two ends and respectively symmetry be hinged on crosshead shoe on the connecting rod, crosshead shoe matches with guiding groove.

4, Gas fuel butterfly valve according to claim 3, it is characterized in that: described guiding groove is made up of the gib block of two secured in parallel on valve plate, top board on the support frame as described above is the I-shaped plate that has mesopore, and an end face of top board contacts with upper and lower voussoir.

5, Gas fuel butterfly valve according to claim 4 is characterized in that: also be respectively arranged with block on upper and lower valve shaft; The top of last valve shaft is connected with the output shaft of oil hydraulic cylinder in the hydraulic pressure installation by joint, and the output shaft of oil hydraulic cylinder is connected with Electric actuator.

6, Gas fuel butterfly valve according to claim 5, it is characterized in that: seal ring is by being bolted on the valve body, gib block and connecting plate are respectively by being bolted on the valve plate, upper and lower voussoir is fixed on the upper and lower valve shaft by locking nut respectively with top board, and the hook plate on the connecting plate is welded on respectively with swash plate and is connected on the base plate.