CN205534253U

CN205534253U - Selection valve

Info

Publication number: CN205534253U
Application number: CN201620191729.6U
Authority: CN
Inventors: 沈云奇; 石瑞君; 仇领光
Original assignee: Ningbo Sanan Valve Manufacture Co ltd
Current assignee: Ningbo Sanan Valve Manufacture Co ltd
Priority date: 2016-03-14
Filing date: 2016-03-14
Publication date: 2016-08-31
Anticipated expiration: 2026-03-14

Abstract

The utility model relates to a selection valve, piston install in the valve body, and the piston forms valve no. 1 with the body seals contact, the piston right -hand member is sealed to slide in pressing the cap inner chamber, is equipped with the spring in the piston indent, and the spring right -hand member offsets with pressing the cap, press cap left end thread sealing to install in the valve body, the right -hand member is equipped with the block, is compressed tightly by the bolt, press cap right -hand member hole to have gliding ejector pin, the slip of ejector pin left end forms valve no. 2 with piston hole sealing contact in stretching into the piston hole, the ejector pin right -hand member is equipped with the spring, and in the block hole was stretched into down to the spring force effect, the valve piston offseted in top surface and the block hole, and the slip of little piston packaging is in the block, the block top is equipped with the gassing and is connected, sealed plug screw has the cap of pressure to connect outward, presses cap connector thread to compress tightly on the block. The structure is simpler, can guarantee the valve and close sealedly that the piston motion deviation is more little, and the valve is closed smoothly more.

Description

Selector valve

Technical field

This utility model relates to the technical field of valve, is especially valve disconnected for fire-fighting fire extinguishing gas long-distance sand transport, logical.

Background technology

Selector valve, is valve disconnected for fire-fighting fire extinguishing gas long-distance sand transport, logical.The selector valve of prior art, as shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, it includes valve body 01, gas outlet 02, lining 03, pressure cap 04, interior hexagonal holding screw 05, air chamber 06, cylinder 07, gas passage 08, piston 09, O-ring seals 010, air inlet 011, bearing pin 012, pressure arm 013, handle 014, rotating shaft 015, pivoted arm 016；Cylinder 07 is arranged on valve body 01 side, relative with gas outlet 02；Piston 09 is arranged in valve body 01, and lower end is in sealing contact with valve body 01, forms valve；Piston 09 upper end seals slides in pressure cap 04 mider hole, and in the middle part of piston 09, lining 03 is connected with pressure cap 04 bore seal, forms air chamber 06；Pressure cap 04 lower end is threaded in valve body 01, has certain orientation to limit on valve body 01, and pressure cap is upper parallel equipped with rotating shaft 015 with bearing pin 012；Pressure arm 013 is rotatably installed on bearing pin 012, and head is by rotating shaft 015 half-round position locking or unlatching, and middle part is equipped with interior hexagonal holding screw 05, gap between scalable pressure arm 013 and piston 09 head；Equipped with handle 014 and pivoted arm 016 in rotating shaft 015, rotating shaft 012 half-round position locking or open that pressure arm 013 is dynamic by handle 014 plate or in cylinder 07, piston pushes pivoted arm 016 and rotates and control.

The operation principle of selector valve is as follows: during work, pushed by piston in cylinder 07 or handle 014 plate moves pivoted arm 016 and rotates, pivoted arm 016 drives rotating shaft 015 to rotate counterclockwise, the power being pressed on pressure arm 013 head is unclamped at rotating shaft 015 semicircle position, piston 09 under air inlet 011 internal pressure differences effect on move, open valve, gas from air inlet 011 through flow direction valve gas outlet 02；After completing work, need pressure arm 013 to depress, make pressure arm 013 head enter half-round position locking in rotating shaft 015, close valve.

But, there is following shortcoming in the selector valve of above-mentioned this structure:

1) under inlet pressure effect, interior hexagonal holding screw 05 holds out against piston 09 head and easily causes piston 09 deforming tops, and piston 09 deforming tops affects interporal lacuna in the pressure cap 04 coordinating slip with it, makes valve opening and closes difficulty.

2) valve nominal operating pressure is the biggest, acts on power on valve inner carrier 09 the biggest, and the power suffered by same purpose pressure arm 013 on piston 09 head is the biggest.One of: bearing pin 012, the rotating shaft 015 that is locked at pressure arm 013 equipped with pressure arm 013 are the most easily deformed；Two: valve opening, open pressure arm 013 head shaft 015 half-round position locking device, need to act on the cylinder 07 of power bigger on handle 014 and bigger specification.

3) valve nominal operating pressure is the biggest, piston 09 is under air inlet 011 gases at high pressure effect, in valve opening moment, the action that piston 09 slides at pressure cap 04 is very fierce, there is unsafe factor and piston 09 clashes to affect and seals when valve is closed next time.

4), after having worked, valve closing needs manually piston 09 to be resetted.

Utility model content

Technical problem to be solved in the utility model is to provide that a kind of piston seal performance is good, action safety and precise, the selector valve of satisfactory quality.

For solving above-mentioned technical problem, a kind of selector valve that this utility model provides, including air inlet, valve body, gas outlet, piston, interior hexagonal cylindrical screw, cushion block, sealing gasket, spring, pressure cap, push rod, air chamber one, gas passage one, valve piston, valve inside one, vent connection, gas passage two, block, valve inside two, pressure cap joint, sealing plug, air chamber two, gas passage three, air chamber three, ventilation mouth, air vent, air chamber four, gas passage four；Piston is arranged in valve body and left end is equipped with sealing gasket and by hexagonal cylindrical screw in compression in cushion block, and piston contacts with valve seal and forms valve one；Piston right-hand member seals and slides in pressure cap inner chamber, is formed and offsets with pressure cap equipped with spring, spring right-hand member on air chamber four, and piston indent；Pressure cap left end thread seal is arranged in valve body, and right-hand member is equipped with block, by bolt presses；Pressure cap right-hand member endoporus is provided with the push rod of slip, and push rod left end slides and stretches in piston inner hole, is in sealing contact formation valve two with piston inner hole；Push rod right-hand member, equipped with spring, stretches in block endoporus under spring force, and end face offsets with valve piston in block endoporus, and valve piston seals and slides in block；Equipped with vent connection above block, it is pressed with valve inside one in vent connection, in valve inside one and vent connection, is in sealing contact formation valve three；Cap side faces, equipped with sealing plug, is pressed with valve inside two in sealing plug, valve inside two and sealing plug are in sealing contact formation valve four；Pressure cap joint, pressure cap joint screw thread is had to be pressed in block outside sealing plug.

Described piston left side sealing gasket, forms axial seal with valve body, forms valve one.

Having cross-hole in described piston, wherein cross-hole right-hand member has seal groove, and seal groove is equipped with O-ring seals, and cross-hole had both been gas passage four, is again to contact formation valve two with push rod slipper seal.

There is inward recess on the described piston right side, and shrinkage pool offsets equipped with spring and with spring one end.

Described pressure cap right-hand member is internal porose, and two ends, hole are respectively equipped with O-ring seals, and push rod seals and slides in pressure cap endoporus；Pressure cap endoporus direction has parallel gas passage one and vertical direction to have air-vent, steam vent.

Described block left end has endoporus, has push rod right-hand member to stretch in endoporus, and push rod pushes against under spring force and is contained in valve piston in block.

Equipped with vent connection above described block, it is pressed with valve inside one in vent connection, in valve inside one and vent connection, is in sealing contact formation valve three.

Described cap side faces, equipped with sealing plug, is pressed with valve inside two in sealing plug, valve inside two and sealing plug are in sealing contact formation valve four.

The outer pressure cap joint of described sealing plug, pressure cap joint screw thread is pressed in block.

After using above structure, this utility model compared with prior art, has the advantage that

1) being axial seal due to piston and valve body, piston, under air inlet intrinsic pressure power effect, adds the power on piston that is pressed in the biggest, and at valve, sealing is the best.

2), as when valve one is closed, in valve body, circulated gases pressure is, now valve two, valve three are to open, and valve four is closed；Open valve one and only need to push valve inside two in pressure cap joint little force, open valve four.

3) only need to push valve inside two in pressure cap joint little force owing to opening valve one, open valve four；This pushes device can be with the various ways such as mechanical, electronic, pneumatic, manual.

4) valve one is opened piston and is moved under gas pressure difference effect in air inlet, and piston moves and carries out in valve body, it is ensured that piston action safety.

5) after hours, piston automatic-closing valve one under the action of the spring, it is not necessary to adjust and reset.

Accompanying drawing explanation

Fig. 1 is the structural representation of selector valve in prior art.

Fig. 2 is A-A structural representation in Fig. 1.

Fig. 3 be in Fig. 1 B to structural representation.

Fig. 4 is the structural representation of a kind of selector valve of this utility model.

Fig. 5 is partial enlargement structural representation in Fig. 4.

Wherein:

In prior art: 01, valve body；02, gas outlet；03, lining；04, pressure cap；05, interior hexagonal holding screw；06, air chamber；07, cylinder；08, gas passage；09, piston；010, O-ring seals；011, air inlet；012, bearing pin；013, pressure arm；014, handle；015, rotating shaft；016, pivoted arm.

This utility model: 1, air inlet；2, valve body；3, gas outlet；4, piston；5, interior hexagonal cylindrical screw；6, cushion block；7, sealing gasket；8, spring；9, pressure cap；10, push rod；11, air chamber one；12, gas passage one；13, valve piston；14, valve inside one；15, vent connection；16, gas passage two；17, block；18, valve inside two；19, pressure cap joint；20, sealing plug；21, air chamber two；22, gas passage three；23, air chamber three；24, air-vent；25, steam vent；26, air chamber four；27, gas passage four.

Detailed description of the invention

With detailed description of the invention, this utility model is described in more detail below in conjunction with the accompanying drawings.

From the structural representation of a kind of selector valve of Fig. 4, Fig. 5 this utility model, including air inlet 1；Valve body 2；Gas outlet 3；Piston 4；Interior hexagonal cylindrical screw 5；Cushion block 6；Sealing gasket 7；Spring 8；Pressure cap 9；Push rod 10；Air chamber 1；Gas passage 1；Valve piston 13；Valve inside 1；Vent connection 15；Gas passage 2 16；Block 17；Valve inside 2 18；Pressure cap joint 19；Sealing plug 20；Air chamber 2 21；Gas passage 3 22；Air chamber 3 23；Air-vent 24；Steam vent 25；Air chamber 4 26；Gas passage 4 27.Piston 4 is arranged in valve body 2, and left end equipped with sealing gasket 7, compressed by hexagonal cylindrical screw 5 in cushion block 6, is in sealing contact formation valve one with valve body 2；Piston 4 right-hand member seals and slides in pressure cap 9 inner chamber, is formed and offsets with pressure cap 9 equipped with spring 8, spring 8 right-hand member on air chamber 4 26, and piston 4 indent；Pressure cap 9 left end thread seal is arranged in valve body 2, and right-hand member is equipped with block 17, by bolt presses；Pressure cap 9 right-hand member endoporus is provided with the push rod 10 of slip, and push rod 10 left end slides and stretches in piston 4 endoporus, is in sealing contact formation valve two with piston 4 endoporus；Push rod 10 right-hand member, equipped with spring, stretches in block 17 endoporus under spring force, and end face offsets with valve piston 13 in block 17 endoporus, and valve piston 13 seals and slides in block 17；Equipped with vent connection 15 above block 17, it is pressed with valve inside 1 in vent connection 15, in valve inside 1 and vent connection 15, is in sealing contact formation valve three；Block 17 side, equipped with sealing plug 20, is pressed with valve inside 2 18 in sealing plug 20, valve inside 2 18 and sealing plug 20 are in sealing contact formation valve four；Pressure cap joint 19, pressure cap joint 19 screw thread is had to be pressed in block 17 outside sealing plug 20.

Described piston 4 left side sealing gasket 7, forms axial seal with valve body 2, forms valve one.

Having cross-hole in described piston 4, wherein cross-hole right-hand member has seal groove, and seal groove is equipped with O-ring seals, and cross-hole had both been gas passage 4 27, is again to contact formation valve two with push rod 10 slipper seal.

There is inward recess on described piston 4 right side, and shrinkage pool offsets equipped with spring 8 and with spring 8 one end.

Described pressure cap 9 right-hand member is internal porose, and two ends, hole are respectively equipped with O-ring seals, and push rod 10 seals and slides in pressure cap 9 endoporus；Pressure cap 9 endoporus direction has parallel gas passage one and vertical direction to have air-vent 24, steam vent 25.

Described block 17 left end has endoporus, has push rod 10 right-hand member to stretch in endoporus, and push rod 10 pushes against under spring force and is contained in valve piston 13 in block 17.

Equipped with vent connection 15 above described block 17, it is pressed with valve inside 1 in vent connection 15, in valve inside 1 and vent connection 15, is in sealing contact formation valve three；

Described block 17 side, equipped with sealing plug 20, is pressed with valve inside 2 18 in sealing plug 20, valve inside 2 18 and sealing plug 20 are in sealing contact formation valve four；

Pressure cap joint 19, pressure cap joint 19 screw thread is had to be pressed in block 17 outside described sealing plug 20.

Work process of the present utility model is as follows:

1) work process during valve closing；Gas enters from air inlet 1, flows to air chamber 4 26 through gas passage 4 27, then washes valve three at valve inside 1 open through gas passage 1 and flow to gas passage 2 16, arrives at valve inside 2 18 in valve four；Now to close at valve one and valve four, and between as gas pressure is, in the case of internal gas pressure power is the same, valve inside 1 cuts out valve three at spring-force driven dual, and piston 4 presses valve one under gas pressure effect in air inlet 1 gas flow air chamber 1.

2) work process during valve opening；Backing down valve inside 2 18 at pressure cap joint 19 and open valve four, gas flows to air chamber 2 21 through valve four, crosses gas passage 3 22 arrival air chamber 3 23, opens valve three at valve inside 1 under pressure differential effect simultaneously, and gas flows to air chamber 3 23 continually；Owing to valve piston 13 compression area is more than push rod 10 compression area, valve piston 13 is under air chamber 3 23 gas pressure, push rod 10 is promoted to be moved to the left, push rod 10 moves and stretches into cut out valve two in piston 4, air inlet 1 gas is made to be obstructed at gas passage 4 27, and push rod 10 is moved to the left connection air chamber one, steam vent 25, air chamber 4 26, in making air chamber 4 26, gas flows to outside valve body through steam vent 25, in air chamber 4 26, pressure reduces therewith, piston 4 produces pressure differential in air inlet 1 under gas pressure effect, piston 4 moves to right, open valve one, gas flows to gas outlet 3 from air inlet 1 through valve one.

After having worked, in valve body, gas pressure is as external atmosphere pressure, and piston 4 promotes piston 4 to move to left closedown valve one under spring 8 acts on, and push rod 10 promotes valve piston 13 to move to right on push rod 10 under spring effect simultaneously, opens valve two；Valve inside 1, valve inside 2 18 close valve three, valve four the most under the action of the spring.

Claims

1. a selector valve, it is characterized in that: include air inlet (1), valve body (2), gas outlet (3), piston (4), interior hexagonal cylindrical screw (5), cushion block (6), sealing gasket (7), spring (8), pressure cap (9), push rod (10), air chamber one (11), gas passage one (12), valve piston (13), valve inside one (14), vent connection (15), gas passage two (16), block (17), valve inside two (18), pressure cap joint (19), sealing plug (20), air chamber two (21), gas passage three (22), air chamber three (23), air-vent (24), steam vent (25), air chamber four (26) and gas passage four (27)；Piston (4) is arranged in valve body (2) and left end compresses equipped with sealing gasket (7) and by hexagonal cylindrical screw (5) in cushion block (6), and piston (4) contacts with valve body (2) axial seal and forms valve one；Piston (4) right-hand member seals and slides in pressure cap (9) inner chamber, form air chamber four (26), and equipped with spring (8) in piston (4) right-hand member indent, spring (8) right-hand member offsets with pressure cap (9)；Pressure cap (9) left end thread seal is arranged in valve body (2), and right-hand member is equipped with block (17), by bolt presses；Pressure cap (9) right-hand member endoporus is provided with the push rod (10) of slip, and push rod (10) left end slides and stretches in piston (4) endoporus, is in sealing contact formation valve two with piston (4) endoporus；Push rod (10) right-hand member is equipped with spring, stretch in block (17) endoporus under spring force, end face offsets with valve piston (13) in block (17) endoporus, and valve piston (13) seals and slides in block (17)；Block (17) top is equipped with vent connection (15), it is pressed with valve inside one (14) in vent connection (15), in valve inside one (14) and vent connection (15), is in sealing contact formation valve three；Block (17) side, equipped with sealing plug (20), is pressed with valve inside two (18) in sealing plug (20), valve inside two (18) and sealing plug (20) are in sealing contact formation valve four；Pressure cap joint (19), pressure cap joint (19) screw thread is had to be pressed in block (17) outside sealing plug (20).

Selector valve the most according to claim 1, it is characterized in that: in described piston (4), have cross-hole, wherein cross-hole right-hand member has seal groove, seal groove is equipped with O-ring seals, cross-hole had both been gas passage four (27), was again the slip endoporus being in sealing contact with push rod (10).

Selector valve the most according to claim 1, it is characterised in that: there is inward recess on described piston (4) right side, and shrinkage pool is provided with spring (8).

Selector valve the most according to claim 1, it is characterised in that: having endoporus inside described pressure cap (9) right-hand member, endoporus two ends are respectively equipped with O-ring seals, and push rod (10) seals and slides in pressure cap (9) endoporus；Pressure cap (9) endoporus direction has parallel gas passage one (12) and vertical direction to have air-vent (24), steam vent (25).

Selector valve the most according to claim 1, it is characterised in that: described block (17) left end has endoporus, equipped with valve piston (13) on endoporus.

Selector valve the most according to claim 1, it is characterized in that: described block (17) top is equipped with vent connection (15), it is pressed with valve inside one (14) in vent connection (15), in valve inside one (14) and vent connection (15), is in sealing contact formation valve three.

Selector valve the most according to claim 1, it is characterized in that: described block (17) side is equipped with sealing plug (20), being pressed with valve inside two (18) in sealing plug (20), valve inside two (18) and sealing plug (20) are in sealing contact formation valve four.

Selector valve the most according to claim 1, it is characterised in that: there are pressure cap joint (19), pressure cap joint (19) screw thread to be pressed in block (17) outside described sealing plug (20).