CN205877317U - Gas self - closing valves - Google Patents

Abstract

The utility model provides a gas self - closing valves belongs to valve technical field. It has solved the problem that current gas self - closing valves control accuracy is low. This gas self - closing valves, including pipy valve body, the one end of valve body has the air inlet, the other end has the gas outlet, the valve body in -connection has the case, the case has linked firmly the end cap in the one end of air inlet, still be connected with the valve rod in the valve body, the diaphragm has been linked firmly between the lower extreme of valve rod and the valve body inner wall, atmospheric pressure intracavity sliding connection has the gear frame, the upper end of gear frame has linked firmly magnet, the lower extreme of valve rod has the actuation portion of iron, the atmospheric pressure intracavity still links firmly the locating plate of iron, be equipped with the driving medium between the lower extreme of gear frame and the case, the valve body all is equipped with the bearing at the both ends of case. This gas self - closing valves's control accuracy is higher, and life is longer.

Description

A kind of pipe gas self-closing valve

Technical field

This utility model belongs to valve technology field, relates to a kind of pipe gas self-closing valve.

Background technology

Pipe gas self-closing valve is that one is installed on low-pressure fuel gas system pipeline, when gas supply conduit pressure occur under-voltage, During superpressure, not electricity consumption or other external impetus can be automatically switched off, and the device that palpus is manually opened, it is adaptable to pipe natural gas, liquid Liquefied oil gas, artificial coal gas, pipe gas self-closing valve ultimate principle be permanent magnet material is magnetized according to design requirement make permanent The multipole permanent magnetism link gear of memory, is identified by the change of gaseous-pressure parameter therebetween, when exceeding security settings Automatic-closing valve during value, cuts off source of the gas.

As Chinese utility model patent application (application number: 201520890356.7) discloses a kind of throttle type gas safe Self-closing valve, it is characterised in that: valve gap, valve seat, carry button component, portable pull bar, rubbery membrana dermalis, spring, spherical blocking piece, air inlet, Rubber air inlet plug, valve port, location blocked shot, upper armature, permanent magnet, spacing armature, master control bar, lower valve chamber, spiracle, give vent to anger Mouth, hand-operated valve, gas inlet end and gas outlet end, wherein master control bar drives location blocked shot to move by moving up and down Dynamic, it is achieved the keying of self-closing valve, but produce sliding friction with valve body when this location blocked shot moves, during life-time service, Location blocked shot can by bigger abrasion, and and valve body between force of sliding friction change greatly, thus affect control accuracy.

Summary of the invention

The purpose of this utility model is to there are the problems referred to above for existing technology, it is proposed that a kind of pipe gas is self-closing Valve, the control accuracy of this pipe gas self-closing valve is higher, and service life is longer.

The purpose of this utility model can be realized by following technical proposal: a kind of pipe gas self-closing valve, including tubulose Valve body, one end of described valve body has air inlet, and the other end has gas outlet, and being axially moveable connection in described valve body has bar The spool of shape, described spool is fixed with plug in one end of air inlet, and also moving radially connection in described valve body has valve rod, institute State and between the lower end of valve rod and valve interior wall, be fixed with diaphragm, between this diaphragm downside and valve interior wall, form atmospheric pressure cavity, on State spool and be positioned at atmospheric pressure cavity, it is characterised in that also radially sliding connection along valve body in described atmospheric pressure cavity has gear frame, described biography The upper end of moving frame is fixed with Magnet, and the lower end of described valve rod has the adhesive portion of irony, is also fixed with irony in described atmospheric pressure cavity Location-plate, described adhesive portion is positioned at the top of Magnet, and described location-plate is positioned at the lower section of Magnet, the lower end of described gear frame with Being provided with when gear frame moves down the driving member that plug can be made to be blocked by air inlet between spool, described valve body is at spool Two ends be equipped with and spool can be supported, and when spool moves, carry out the bearing guided.

Valve body is arranged on gas pipeline, and the air inlet of valve body is connected with the supply end of combustion gas, and gas outlet is fired with using The equipment of gas is connected, and installs the axial level of rear valve body at valve body, the outer end of valve rod upward, on the inwall of valve body inlet end Having the sealing convex edge of annular, spool passes sealing convex edge towards one end of air inlet, stifled when self-closing valve is closed End surface is resisted against on sealing convex edge, thus blocks air inlet, now the adhesive portion of valve rod adsorb mutually with Magnet against, Magnet adsorb mutually with location-plate against, and the absorption affinity of adhesive portion and Magnet is more than the absorption affinity of location-plate with Magnet, manually opens Needing poppet-valve bar when opening self-closing valve, Magnet is lifted up by valve rod by adhesive portion, i.e. gear frame moves up, gear frame Mobile then by driving member, spool is moved to air inlet direction, i.e. plug departs from and seals convex edge, and air inlet is opened, and combustion gas is entered Entering in atmospheric pressure cavity, now the air pressure in atmospheric pressure cavity becomes larger, until the gravity of the parts such as valve rod, gear frame, Magnet and location Plate reaches balance to the absorption affinity sum of Magnet with the air pressure in atmospheric pressure cavity, and valve rod is then suspended in valve body, now atmospheric pressure cavity Interior air pressure is in normal air pressure range when working；When occurring superpressure in atmospheric pressure cavity, the combustion gas that i.e. air inlet enters makes The air pressure of air pressure intracavity excessive and beyond normal set point, air pressure excessive in atmospheric pressure cavity makes diaphragm float further, I.e. valve rod continue rise, owing to gear frame is positioned at below location-plate, can with location-plate against, do not continue to rise, therefore Magnet Departing from adhesive portion, owing to the distance between Magnet and adhesive portion becomes larger, i.e. absorption affinity tapers into, until adhesive portion and magnetic When absorption affinity between ferrum is less than the gravity sum of the absorption affinity between location-plate and Magnet and gear frame, gear frame is decreased until Magnet adsorb mutually with location-plate against, and gear frame decline during spool can be made to direction, gas outlet by driving member Mobile, i.e. plug leans with sealing convex edge and is blocked by air inlet；When occurring under-voltage in atmospheric pressure cavity, i.e. air inlet enters Combustion gas make the air pressure in atmospheric pressure cavity too small and during less than normal set point, the air pressure in atmospheric pressure cavity is not enough to allow valve rod continue Continuing and be in suspended state, absorption affinity and the action of gravity underdrive frame of valve rod between location-plate and Magnet decline, equally, Gear frame can make spool move to direction, gas outlet by driving member during declining, i.e. plug offsets with sealing convex edge Lean on and air inlet is blocked, thus realize the superpressure of self-closing valve, under-voltage automatic Guan Bi, and in this self-closing valve, spool needs Realizing Guan Bi by moving axially, owing to the two ends of spool are supported by bearing, bearing can also provide for spool simultaneously Guide, be rolling friction when therefore spool moves and between bearing, and sliding friction between spool and valve body in tradition self-closing valve Comparing, rolling friction is less to the abrasion of spool, is subject to all the time when therefore during the life-time service of self-closing valve, spool moves Identical resistance, the thrust that therefore gear frame promotes spool to move is the most stable, thus improves the control accuracy of self-closing valve, with Time, precision obtains stable holding, and the service life also making self-closing valve is longer.

In above-mentioned pipe gas self-closing valve, described valve body is respectively connected with two bearings, and two bearings at the two ends of spool Being arranged above and below, the end of described spool is plugged between two bearings, and the cross section of described spool is rectangular, and the downside of spool It is pressed on the bearing outer peripheral face of lower section.Lower section bearing spool is supported, and when gear frame rise and make spool to When air inlet direction is moved, spool is by active force upwards, and therefore spool is carried out spacing by the bearing of top so that spool is protected Keep steady fixed.

In above-mentioned pipe gas self-closing valve, it is fixed with two guide holders in described valve body, described guide holder offers Guiding breach, be all connected in the guiding breach of same guide holder with the two bearings of one end, the end of above-mentioned spool is through guiding Breach.Bearing is positioned at guiding breach so that overall structure is compacter, is installed by bearing in advance when self-closing valve assembles simultaneously On guide holder so that the position of bearing is more accurate, improves control accuracy.

In above-mentioned pipe gas self-closing valve, described valve body medial wall is respectively provided with, at the two ends of spool, two be oppositely arranged Fixed part, all offers fixing groove with on the side of two fixed parts of one end, and described guide holder is rectangular, and the both sides of guide holder Fixing in groove along being fixedly plugged in the two of same one end respectively, above-mentioned location-plate is connected on the upper surface of fixed part.Guide holder is straight Patch and be connected in fixing groove, easier for installation, and location-plate is fixed on fixed part, it is possible to guide holder is positioned.

In above-mentioned pipe gas self-closing valve, described driving member includes trundle, and described gear frame takes the shape of the letter U, and transmission Down, the two ends of described trundle are respectively fixedly connected with on relative two medial walls of gear frame the recess of frame, this trundle axial The most perpendicular with valve body, described spool offers the chute of strip, and the upper end of this chute tilts to one end, gas outlet, Described trundle slides and is located in chute, and air inlet is blocked by plug when trundle is positioned at the lower end of chute.Transmission The lower end of frame is enclosed within spool, and when gear frame moves up, trundle can act on the upper cell wall that chute tilts, and therefore can Enough promoting spool to move to air inlet direction, air inlet is opened, and in like manner, when gear frame moves down, trundle can act on The lower cell wall that chute tilts, therefore, it is possible to promote spool to move to direction, gas outlet, air inlet closure, certainly processed in reality In journey, driving member can also include swing arm, and this swing arm is hinged on valve body, and the upper end of swing arm is hinged with gear frame, valve Offering breach on core, the lower end of swing arm is plugged in breach, swing arm can be driven to swing, pass through thick stick when gear frame moves Rod principle, the lower end of swing arm can promote spool to move.

In above-mentioned pipe gas self-closing valve, relative two medial walls of described valve body are respectively provided with guide part, described in two All axially offer gathering sill along valve rod on the opposite flank of guide part, the opposite sides face of described gear frame is respectively provided with and leads To block, described guide pad is slidably connected in gathering sill.Owing to chute tilts, therefore can be tilted when gear frame moves Active force, and guide pad coordinates with gathering sill so that gear frame in the vertical direction moves more steady.

In above-mentioned pipe gas self-closing valve, the upper surface of described gear frame vertically has connection post, described location Offering via on plate, the upper end of this connection post slides through the via of location-plate, and the upper end of described connection post is solid by screw Being connected with and protect magnetosheath, above-mentioned Magnet is connected in and protects in magnetosheath, described in protect the external diameter of the magnetosheath diameter more than via, and when Magnet is with fixed Position plate protects the lower surface of magnetosheath and leans with location-plate upper side when adsorbing mutually.Protect magnetosheath Magnet is protected, it is to avoid transmission Frame under location-plate absorption affinity effect during rapid decrease Magnet directly clash into location-plate.

In above-mentioned pipe gas self-closing valve, described adhesive portion is disc-shaped, and on the downside in adhesive portion, circumference has The limit convex edge of annular, adsorbs the lower surface of convex edge, time limit position mutually when Magnet and adhesive portion and leans with Magnet upper surface.Pass through The height on processing limit convex edge limits absorption affinity when adhesive portion and Magnet lean, thus air pressure when self-closing valve is closed Scope carries out reasonable set.

In above-mentioned pipe gas self-closing valve, described valve rod being arranged with the clamping plate of two plate-likes, described valve rod is at clamping plate Top be bolted with locking nut, ringwise, and the inside edge of diaphragm is between two clamping plate for described diaphragm, when locking nut revolves Clamping plate below time tight are pressed on adhesive portion upper side, and the inside edge of diaphragm is clamped between two clamping plate.Diaphragm inner edge Clamping along by two clamping plate, it is achieved the face seal of diaphragm inside edge, not only bonding strength is high, and good airproof performance.

In above-mentioned pipe gas self-closing valve, described valve body also has cylindrical portion, and described cylindrical portion is fixed with valve gap, The outer edge of above-mentioned diaphragm is pressed between the port edges of cylindrical portion and valve gap, and valve gap is stretched out in the upper end of described valve rod, and The end stretched out is fixed with handle.Diaphragm outer edge circumferential seal, thus ensure the sealing of atmospheric pressure cavity.

Compared with prior art, this pipe gas self-closing valve has the advantage that

1, due to when spool moves and between bearing for rolling friction, and tradition self-closing valve are slided between spool and valve body Friction is compared, and rolling friction is less to the abrasion of spool, when therefore during the life-time service of self-closing valve, spool moves all the time By identical resistance, the thrust that therefore gear frame promotes spool to move is the most stable, thus improves the control essence of self-closing valve Degree.

2, obtaining stable holding due to the control accuracy of self-closing valve, the service life also making self-closing valve is longer.

3, owing in advance bearing being arranged on guide holder when self-closing valve assembles so that the position of bearing is more accurate, Improve control accuracy.

Accompanying drawing explanation

Fig. 1 is the perspective view of this pipe gas self-closing valve.

Fig. 2 is structure sectional view during this pipe gas self-closing valve Guan Bi.

Fig. 3 is the structure sectional view during unlatching of this pipe gas self-closing valve.

Fig. 4 is the schematic enlarged-scale view in Fig. 2 at A.

Fig. 5 is the perspective view of valve body.

Fig. 6 is the perspective view of gear frame.

In figure, 1, valve body；11, air inlet；12, gas outlet；13, atmospheric pressure cavity；14, fixed part；141, fixing groove；15, lead To portion；151, gathering sill；16, cylindrical portion；2, spool；21, plug；22, chute；3, valve rod；31, adhesive portion；32, limit convex Edge；33, clamping plate；34, locking nut；35, handle；4, gear frame；41, Magnet；42, guide pad；43, post is connected；44, magnetic is protected Set；45, trundle；5, location-plate；51, via；6, guide holder；61, breach is guided；62, bearing；7, valve gap；8, diaphragm.

Detailed description of the invention

The following is specific embodiment of the utility model and combine accompanying drawing, the technical solution of the utility model is made further Description, but this utility model is not limited to these embodiments.

As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of pipe gas self-closing valve, including the valve body 1 of tubulose, one end of valve body 1 Having air inlet 11, the other end has gas outlet 12, and valve body 1 is arranged on gas pipeline, the air inlet 11 of valve body 1 and combustion gas Supply end is connected, and gas outlet 12 is connected with the equipment using combustion gas, and being axially moveable connection in valve body 1 has shaft-like spool 2, spool 2 is fixed with plug 21 in one end of air inlet 11, and the inwall of valve body 1 inlet end has the sealing convex edge of annular, valve Core 2 passes sealing convex edge towards one end of air inlet 11, and when self-closing valve is closed, plug 21 end face is resisted against sealing On convex edge, thus blocking air inlet 11, also moving radially connection in valve body 1 has valve rod 3, after valve body 1 installs The axial level of valve body 1, the outer end of valve rod 3 upward, is fixed with diaphragm 8 between lower end and valve body 1 inwall of valve rod 3, this diaphragm 8 Forming atmospheric pressure cavity 13 between downside and valve body 1 inwall, spool 2 is positioned at atmospheric pressure cavity 13, in atmospheric pressure cavity 13 also along valve body 1 radially Slidably connecting gear frame 4, the upper end of gear frame 4 is fixed with Magnet 41, and the lower end of valve rod 3 has the adhesive portion 31 of irony, gas Also being fixed with the location-plate 5 of irony in pressure chamber 13, adhesive portion 31 is positioned at the top of Magnet 41, and location-plate 5 is positioned at Magnet 41 times Side, is provided with when gear frame 4 moves down between lower end and the spool 2 of gear frame 4 and plug 21 can be made to be blocked by air inlet 11 The driving member lived, valve body 1 is equipped with at the two ends of spool 2 and can be supported spool 2, and guides when spool 2 moves Bearing 62, when self-closing valve closes the adhesive portion 31 of valve rod 3 and Magnet 41 phase absorption against, Magnet 41 is attracting with location-plate 5 Attached against, and the absorption affinity of adhesive portion 31 and Magnet 41 is more than the absorption affinity of location-plate 5 with Magnet 41, during manually opened self-closing valve Need poppet-valve bar 3, valve rod 3 to be lifted up by Magnet 41 by adhesive portion 31, i.e. gear frame 4 moves up, the shifting of gear frame 4 Dynamic then by driving member, spool 2 is moved to air inlet 11 direction, i.e. plug 21 departs from and seals convex edge, and air inlet 11 is opened, Combustion gas enters in atmospheric pressure cavity 13, and now the air pressure in atmospheric pressure cavity 13 becomes larger, until the portions such as valve rod 3, gear frame 4, Magnet 41 Gravity and the location-plate 5 of part reach balance to the absorption affinity sum of Magnet 41 with the air pressure in atmospheric pressure cavity 13, and valve rod 3 then suspends In valve body 1, now the air pressure in atmospheric pressure cavity 13 is in air pressure range when normally working；When in atmospheric pressure cavity 13, superpressure occurring Time, the combustion gas that i.e. air inlet 11 enters makes the air pressure in atmospheric pressure cavity 13 excessive and exceeds normal set point, in atmospheric pressure cavity 13 Excessive air pressure makes diaphragm 8 float further, i.e. valve rod 3 continues to rise, owing to gear frame 4 is positioned at below location-plate 5, and can be with Location-plate 5 against, do not continue to rise, therefore Magnet 41 departs from adhesive portion 31, due between Magnet 41 and adhesive portion 31 away from From becoming larger, i.e. absorption affinity tapers into, until the absorption affinity between adhesive portion 31 and Magnet 41 is less than location-plate 5 and Magnet During the gravity sum of absorption affinity between 41 and gear frame 4, gear frame 4 be decreased until Magnet 41 and the absorption of location-plate 5 phase against, And gear frame 4 can make spool 2 move to direction, gas outlet 12 by driving member during declining, i.e. plug 21 and sealing Convex edge leans and is blocked by air inlet 11；When occurring under-voltage in atmospheric pressure cavity 13, the combustion gas that i.e. air inlet 11 enters makes Air pressure in atmospheric pressure cavity 13 too small and during less than normal set point, the air pressure in atmospheric pressure cavity 13 is not enough to allow at valve rod 3 continuation In suspended state, absorption affinity and the action of gravity underdrive frame 4 of valve rod 3 between location-plate 5 and Magnet 41 decline, with Sample, gear frame 4 can make spool 2 move to direction, gas outlet 12 by driving member during declining, and i.e. plug 21 is with close Envelope convex edge leans and is blocked by air inlet 11, thus realizes the superpressure of self-closing valve, under-voltage automatic Guan Bi, and at this self-closing valve In, spool 2 need by move axially realize Guan Bi, owing to the two ends of spool 2 are supported by bearing 62, bearing 62 simultaneously Can also provide for spool 2 and guide, be rolling friction when therefore spool 2 moves and between bearing 62, with valve in tradition self-closing valve Between core 2 with valve body 1 compared with sliding friction, rolling friction is less to the abrasion of spool 2, therefore in the life-time service mistake of self-closing valve All the time by identical resistance when in journey, spool 2 moves, the thrust that therefore gear frame 4 promotes spool 2 to move is the most stable, from And improve the control accuracy of self-closing valve, meanwhile, precision obtains stable holding, and the service life also making self-closing valve is longer.

Specifically, shown in Fig. 5, Fig. 6, valve body 1 is respectively connected with two bearings 62, and two bearings at the two ends of spool 2 62 are arranged above and below, and the end of spool 2 is plugged between two bearings 62, and the cross section of spool 2 is rectangular, and the downside of spool 2 Being pressed on bearing 62 outer peripheral face of lower section, spool 2 is supported by the bearing 62 of lower section, and when gear frame 4 rises and makes When spool 2 moves to air inlet 11 direction, spool 2 is by active force upwards, and therefore spool 2 is limited by the bearing 62 of top Position so that spool 2 keeps stable.It is fixed with two guide holders 6 in valve body 1, guide holder 6 offers guiding breach 61, same to one end Two bearings 62 be all connected in the guiding breach 61 of same guide holder 6, the end of spool 2 through guide breach 61, bearing 62 It is positioned at guiding breach 61 so that overall structure is compacter, in advance bearing 62 is arranged on when self-closing valve assembles simultaneously and leads On seat 6 so that the position of bearing 62 is more accurate, improves control accuracy.Valve body 1 medial wall is respectively provided with at the two ends of spool 2 Two fixed parts 14 being oppositely arranged, with all offering fixing groove 141, described guide holder 6 on the side of two fixed parts 14 of one end Rectangular, and two edges of guide holder 6 are fixedly plugged in the two of same one end respectively and fix in groove 141, location-plate 5 is connected in fixing On the upper surface in portion 14, guide holder 6 is directly plugged in fixing groove 141, easier for installation, and location-plate 5 is fixed on fixing In portion 14, it is possible to guide holder 6 is positioned.

Driving member includes that trundle 45, gear frame 4 take the shape of the letter U, and the recess of gear frame 4 is down, and the two ends of trundle 45 are divided Be not connected on relative two medial walls of gear frame 4, this trundle 45 axially and valve body 1 the most perpendicular, spool 2 is opened Being provided with the chute 22 of strip, the upper end of this chute 22 tilts to one end, gas outlet 12, and trundle 45 slides and is located in chute 22 In, and air inlet 11 is blocked by plug 21 when trundle 45 is positioned at the lower end of chute 22, the lower end of gear frame 4 is enclosed within spool On 2, when gear frame 4 moves up, trundle 45 can act on the upper cell wall that chute 22 tilts, therefore, it is possible to promote spool 2 Moving to air inlet 11 direction, air inlet 11 is opened, and in like manner, when gear frame 4 moves down, trundle 45 can act on cunning The lower cell wall that groove 22 tilts, therefore, it is possible to promote spool 2 to move to direction, gas outlet 12, air inlet 11 closes.Valve body 1 relative It is respectively provided with guide part 15 on two medial walls, the opposite flank of two guide parts 15 all axially offers gathering sill along valve rod 3 151, the opposite sides face of gear frame 4 is respectively provided with guide pad 42, guide pad 42 is slidably connected in gathering sill 151, due to cunning Groove 22 tilts, the active force that therefore can be tilted when gear frame 4 moves, and guide pad 42 coordinates with gathering sill 151 so that Gear frame 4 in the vertical direction moves more steady.

Vertically there is on the upper surface of gear frame 4 connection post 43, location-plate 5 offers via 51, this connection post 43 Upper end slides through the via 51 of location-plate 5, and the upper end of connection post 43 is fixed with by screw protects magnetosheath 44, and Magnet 41 is connected in Protect in magnetosheath 44, protect the external diameter diameter more than via 51 of magnetosheath 44, and protect magnetosheath 44 when Magnet 41 adsorbs with location-plate 5 phase Lower surface lean with location-plate 5 upper side, protect magnetosheath 44 and Magnet 41 protected, it is to avoid gear frame 4 is inhaled at location-plate 5 Under attached power effect, during rapid decrease, Magnet 41 directly clashes into location-plate 5.Adhesive portion 31 is disc-shaped, in the downside in adhesive portion 31 Upper circumference has the limit convex of annular along 32, when Magnet 41 and adhesive portion 31 phase adsorb lower surface and the Magnet of convex edge, time limit position 32 41 upper surfaces lean, and limit absorption when adhesive portion 31 leans with Magnet 41 by the processing limit convex height along 32 Power, thus air pressure range when closing self-closing valve carries out reasonable set.Valve rod 3 is arranged with the clamping plate 33 of two plate-likes, valve Bar 3 is bolted with locking nut 34 above clamping plate 33, diaphragm 8 ringwise, and the inside edge of diaphragm 8 be positioned at two clamping plate 33 it Between, when locking nut 34 screws below clamping plate 33 be pressed on adhesive portion 31 upper side, and diaphragm 8 inside edge be clamped Between two clamping plate 33, diaphragm 8 inside edge is clamped by two clamping plate 33, it is achieved the face seal of diaphragm 8 inside edge, not only connects strong Degree height, and good airproof performance.Valve body 1 also has cylindrical portion 16, and cylindrical portion 16 is fixed with valve gap 7, and the outer edge of diaphragm 8 is pressed on Between port edges and the valve gap 7 of cylindrical portion 16, valve gap 7 is stretched out in the upper end of valve rod 3, and is fixed with handle in the end stretched out 35, diaphragm 8 outer edge circumferential seal, thus ensure the sealing of atmospheric pressure cavity 13.

Specific embodiment described herein is only to this utility model spirit explanation for example.This utility model institute Belong to those skilled in the art described specific embodiment to make various amendment or supplement or use similar Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.

Although the most more employing the terms such as valve body 1, air inlet 11, gas outlet 12, but it is not precluded from using other The probability of term.Use these terms to be only used to more easily and describe and explain essence of the present utility model；Them It is all contrary with this utility model spirit for being construed to any additional restriction.

Claims (10)

1. a pipe gas self-closing valve, including the valve body (1) of tubulose, one end of described valve body (1) has air inlet (11), separately One end has gas outlet (12), and being axially moveable connection in described valve body (1) has shaft-like spool (2), and described spool (2) is entering One end of QI KOU (11) is fixed with plug (21), and also moving radially connection in described valve body (1) has valve rod (3), described valve rod (3) it is fixed with diaphragm (8) between lower end and valve body (1) inwall, is formed between this diaphragm (8) downside and valve body (1) inwall Atmospheric pressure cavity (13), above-mentioned spool (2) is positioned at atmospheric pressure cavity (13), it is characterised in that also along valve body (1) in described atmospheric pressure cavity (13) Radially sliding connection has gear frame (4), the upper end of described gear frame (4) to be fixed with Magnet (41), the lower end tool of described valve rod (3) Having the adhesive portion (31) of irony, be also fixed with the location-plate (5) of irony in described atmospheric pressure cavity (13), described adhesive portion (31) is positioned at The top of Magnet (41), described location-plate (5) is positioned at the lower section of Magnet (41), the lower end of described gear frame (4) and spool (2) it Between be provided with when gear frame (4) moves down the driving member that plug (21) can be made to be blocked by air inlet (11), described valve body (1) two ends at spool (2) are equipped with and can be supported spool (2), and carry out the bearing guided when spool (2) is mobile (62)。

Pipe gas self-closing valve the most according to claim 1, it is characterised in that described valve body (1) is at the two ends of spool (2) Be respectively connected with two bearings (62), and two bearings (62) be arranged above and below, the end of described spool (2) be plugged on two bearings (62) it Between, the cross section of described spool (2) is rectangular, and the downside of spool (2) is pressed on bearing (62) outer peripheral face of lower section.

Pipe gas self-closing valve the most according to claim 2, it is characterised in that described valve body is fixed with two guiding in (1) Seat (6), described guide holder (6) offers guiding breach (61), is all connected in same guide holder with the two bearings (62) of one end (6), in guiding breach (61), the end of above-mentioned spool (2) is through guiding breach (61).

Pipe gas self-closing valve the most according to claim 3, it is characterised in that described valve body (1) medial wall is in spool (2) Two ends be respectively provided with two fixed parts (14) being oppositely arranged, all offer fixing groove with on the side of two fixed parts (14) of one end (141), described guide holder (6) is rectangular, and two edges of guide holder (6) are fixedly plugged in the two of same one end respectively and fix groove (141), in, above-mentioned location-plate (5) is connected on the upper surface of fixed part (14).

5. according to the pipe gas self-closing valve described in Claims 2 or 3 or 4, it is characterised in that described driving member includes trundle (45), described gear frame (4) takes the shape of the letter U, and the recess of gear frame (4) is down, and the two ends of described trundle (45) are respectively fixedly connected with On relative two medial walls of gear frame (4), this trundle (45) axially and valve body (1) the most perpendicular, described spool (2) On offer the chute (22) of strip, the upper end of this chute (22) tilts to gas outlet (12) one end, described trundle (45) Slip is located in chute (22), and air inlet (11) is sealed by plug (21) when trundle (45) is positioned at the lower end of chute (22) Block.

Pipe gas self-closing valve the most according to claim 5, it is characterised in that relative two medial walls of described valve body (1) On be respectively provided with guide part (15), the opposite flank of guide part described in two (15) all axially offers gathering sill along valve rod (3) (151), the opposite sides face of described gear frame (4) being respectively provided with guide pad (42), described guide pad (42) is slidably connected at leads In groove (151).

Pipe gas self-closing valve the most according to claim 5, it is characterised in that hang down on the upper surface of described gear frame (4) Directly having connection post (43), described location-plate (5) offers via (51), the upper end of this connection post (43) slides through location The via (51) of plate (5), the upper end of described connection post (43) is fixed with by screw protects magnetosheath (44), and above-mentioned Magnet (41) is connected In protecting magnetosheath (44), described in protect the external diameter of magnetosheath (44) diameter more than via (51), and when Magnet (41) and location-plate (5) The lower surface protecting magnetosheath (44) mutually during absorption leans with location-plate (5) upper side.

Pipe gas self-closing valve the most according to claim 7, it is characterised in that described adhesive portion (31) is disc-shaped, is inhaling On the downside in conjunction portion (31), circumference has the limit convex of annular along (32), when Magnet (41) adsorbs the time limit mutually with adhesive portion (31) The lower surface of convex edge, position (32) leans with Magnet (41) upper surface.

9. according to the pipe gas self-closing valve described in Claims 2 or 3 or 4, it is characterised in that described valve rod is arranged with on (3) The clamping plate (33) of two plate-likes, described valve rod (3) is bolted with locking nut (34) in the top of clamping plate (33), described diaphragm (8) in Annular, and the inside edge of diaphragm (8) is positioned between two clamping plate (33), when locking nut (34) screws below clamping plate (33) support It is pressed on adhesive portion (31) upper side, and the inside edge of diaphragm (8) is clamped between two clamping plate (33).

Pipe gas self-closing valve the most according to claim 9, it is characterised in that described valve body (1) also has cylindrical portion (16), described cylindrical portion (16) being fixed with valve gap (7), the outer edge of above-mentioned diaphragm (8) is pressed on the port of cylindrical portion (16) Between edge and valve gap (7), valve gap (7) is stretched out in the upper end of described valve rod (3), and is fixed with handle (35) in the end stretched out.