CN103925391B - Two position three-way valve with gas control end - Google Patents
Two position three-way valve with gas control end Download PDFInfo
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- CN103925391B CN103925391B CN201410170350.2A CN201410170350A CN103925391B CN 103925391 B CN103925391 B CN 103925391B CN 201410170350 A CN201410170350 A CN 201410170350A CN 103925391 B CN103925391 B CN 103925391B
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- 238000007789 sealing Methods 0.000 claims abstract description 28
- 238000012856 packing Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 66
- 239000012530 fluid Substances 0.000 claims description 19
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims description 2
- 238000000354 decomposition reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002360 explosive Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/022—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising a deformable member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0236—Diaphragm cut-off apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1223—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being acted upon by the circulating fluid
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
nullThe invention discloses a kind of two position three-way valve with gas control end，Including valve component、Spool，Valve component includes valve body and valve seat，Valve body upper end open，Valve body arranges three valve ports，The passage connecting valve port is set in valve body，Spool is positioned at valve body，Including valve rod and the upper valve block being fixed on valve rod two ends、Lower disc，Also include gas control end，Gas control end is arranged on valve body upper end，Gas control end includes cylinder block、Piston、Piston seat，Cylinder block upper and lower opening，Internal cavities arranges piston、Piston seat，The push rod of upper piston area and cylinder block are slidably matched，Piston mandril outer wall and cylinder block inwall are sealed by sealing ring，The piston seat being slidably matched with it it is set with outside the bottom of piston，Sealed by small sealing ring between piston and piston seat，Piston seat and cylinder block are slidably matched，Piston seat outer wall and cylinder block inwall are sealed by large sealing packing ring，Cylinder block outer wall between piston mandril and piston seat has the air vent running through cylinder block outer wall.
Description
Technical field
The present invention relates to a kind of pneumatic operated valve, particularly relate to a kind of two-position three way pneumatic operated valve being provided with gas control end.
Background technology
In current industrial pipeline field, two-position three way pneumatic operated valve is widely used, its primary structure is to arrange three valve ports flowing in or out gas or liquid on valve body, moveable spool is set in valve body, valve inner arranges the passage connecting three valve ports, by changing in the valve position control body of spool the break-make of passage between valve port, fluid is made to come in and go out from different valve ports, spool is moved by the gases at high pressure effect injecting valve body, the pneumatic of two-position three way pneumatic operated valve indication refers to that spool is by drive of high-pressure gas, two refer to that spool has two positions controlled, threeway is to arrange three valve ports on a valve body.
There are some defects in existing two-position three way pneumatic operated valve: 1, during drive of high-pressure gas spool, gases at high pressure directly act on spool and make valve core movement, spool generally includes valve rod, valve block, the direct dash valve sector-meeting infringement valve block of gases at high pressure, additionally, valve rod cannot be promoted when air pressure is less to move, passage cannot break-make completely, cause fluid seepage；2, without gases at high pressure, time, the movement of spool is by the effect of residual gases at high pressure in valve body, and spool moving resistance is big, it is therefore necessary to improve.
Summary of the invention
The technical problem to be solved is to overcome the above-mentioned deficiency of prior art to provide a kind of two position three-way valve with gas control end, makes spool move flexibly, and complete application valve body fluid passage break-make is highly reliable, it is prevented that seepage, and simple in construction.
nullThis invention address that the technical scheme that the problems referred to above adopt is: with the two position three-way valve of gas control end，Including valve component、Spool，Valve component includes valve body and valve seat，Valve body upper end open，Valve body arranges three valve ports，The passage connecting valve port is set in valve body，Spool is positioned at valve body，Including valve rod and the upper valve block being fixed on valve rod two ends、Lower disc，Described two position three-way valve also includes gas control end，Gas control end is arranged on valve body upper end，Gas control end includes cylinder block、Piston、Piston seat，Cylinder block upper and lower opening，Internal cavities arranges piston、Piston seat，The push rod of upper piston area and cylinder block are slidably matched，Piston mandril outer wall and cylinder block inwall are sealed by sealing ring，The piston seat being slidably matched with it it is set with outside the bottom of piston，Sealed by small sealing ring between piston and piston seat，Piston seat and cylinder block are slidably matched，Piston seat outer wall and cylinder block inwall are sealed by large sealing packing ring，Cylinder block outer wall between piston mandril and piston seat has the air vent running through cylinder block outer wall，Cylinder block upper end promotes piston after injecting gases at high pressure，Piston extruding valve rod，Valve rod drives upper valve block、Lower disc moves down，Connection or partition connect the passage of valve port.
Having exhaust passage in the piston optimized further, the opening of lower end, exhaust passage is laterally, and exhaust passage connects piston superjacent air space and piston seat underlying space.
Above-mentioned valve component includes valve body, valve seat, and valve seat is fixed on below valve body, and the central passage that can allow fluid flow, with through hole, is left in valve body center between through-hole wall and valve rod；Having three valve ports on the sidewall of valve body, be the first valve port, the second valve port, the 3rd valve port respectively, wherein the second valve port is directly connected with the through hole at valve body center；The upper end face of valve body arranges the groove connected with central passage, and upper valve block is positioned at the top of this groove and groove is completely covered, and gas control side pressure tightly goes up the outward flange of valve block, and bottom portion of groove is with first passage, first passage and the connection of the first valve port；The bottom surface of valve body is also with the groove connected with central passage, and lower disc is positioned at the lower section of this groove and groove is completely covered, the outward flange of seat compression lower disc, and the above of groove connects with third channel, third channel and the 3rd valve port.
Spool includes valve block, valve rod, lower disc, spring, the fixing upper valve block in valve rod top, lower disc is fixed in bottom, upper valve block, lower disc adopt the flexible materials such as rubber to make, with the hole of multiple up/down perforations on lower disc, the bottom of valve rod arranges installing hole, and the top of spring can be inserted in installing hole, and lower end is positioned at valve seat top pit bottom.
When valve rod moves down, upper valve block blocking central passage upper end, when valve rod moves, the lower end of lower disc blocking central passage.
Above-mentioned spool also includes flexible back-up ring, and back-up ring is the annular of edge bending, and shield ring sleeve is on the top of valve rod, and back-up ring is positioned at the lower section of valve block and is buckled in above first passage.
Above-mentioned two position three-way valve also includes installing plate, the annulus sidewall that installing plate includes integral type and the planar top being attached thereto, and annulus sidewall can wrap up valve component, with multiple long lumbar holes for fixedly mounting plate in annulus sidewall, planar top.
Compared with prior art, it is an advantage of the current invention that: 1, gas control end is installed in valve component upper end, drive the gases at high pressure of this valve to enter cylinder block from the upper end of gas control end, promote piston press spool, it is to avoid gases at high pressure directly impact spool；The outer wall of cylinder block arranges air vent, and when piston, piston seat move, the air between piston mandril and piston seat can be discharged by air vent, decreases the resistance of piston, piston seat motion.2, when piston moves down, piston extruding valve rod, exhaust passage connection piston superjacent air space and piston seat underlying space, gases at high pressure are made to can also pass through below piston seat, gases at high pressure and piston extrude spool simultaneously, guarantee that spool also may move when air pressure is less, control the break-make of fluid passage completely, it is prevented that seepage.3, when valve rod moves up, if remaining gases at high pressure in cylinder block, because arranging exhaust passage, above push rod with piston seat below gas communication, residual gases at high pressure also can enter below piston seat, and residual gases at high pressure promote and move on piston seat, be equivalent to the space increased below piston seat, the pressure making residual gases at high pressure reduces, and the air between piston seat and push rod is discharged by air vent, reduces the resistance moved on valve rod.4, flexible back-up ring is set, it is prevented that valve block on fluid erosion, it is possible to reduce the valve body infringement to upper valve block between upper valve block and first passage.5, with multiple holes on lower disc, the fluid in third channel can pass through this hole and flow into valve seat pit, namely prevents fluid erosion lower disc, can prevent again fluid impact lower disc from making valve rod move down.6, installing plate is securable to top or the bottom of valve component, and installation site is flexible, and long lumbar hole is easily installed.
Accompanying drawing explanation
Fig. 1 is the perspective view of the embodiment of the present invention.
Fig. 2 is the explosive decomposition figure of structure shown in Fig. 1.
Fig. 3 is the sectional view of gas control end in the embodiment of the present invention.
Fig. 4 is the explosive decomposition figure of structure shown in Fig. 3.
Fig. 5 is the perspective view of installing plate.
Fig. 6 is the top view of installing plate shown in Fig. 5.
Fig. 7 is the schematic diagram of another installation site of installing plate.
Fig. 8 is the explosive decomposition figure of valve core structure of the present invention.
Fig. 9 is the explosive decomposition figure of valve body structure of the present invention.
Figure 10 is the main pseudosection of the embodiment of the present invention.
Figure 11 is the left view profile of the embodiment of the present invention.
Figure 12 is the top plan view of the embodiment of the present invention.
In figure: 1, gas control end, 11, cylinder block, 12, piston, 121, push rod, 13, sealing ring, 14, small sealing ring, 15, piston seat, 16, large sealing packing ring, 17, air vent, 18, exhaust passage；2, installing plate, 21, sidewall long lumbar hole, 22, roof long lumbar hole；3, spool, 31, upper valve block, 32, valve rod, 33, lower disc, 34, back-up ring, 35, spring；4, valve component, 41, valve body, 42, valve seat, the 43, first valve port, the 44, second valve port, the 45, the 3rd valve port, 461, first passage, 462, central passage, 463, third channel.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment, the present invention is further described.
Embodiment, as shown in Figure 1 and Figure 2 two position three-way valve, including gas control end 1, installing plate 2, spool 3 and valve component 4, it is internal that spool 3 is installed on valve component 4, and gas control end 1 is installed on the upper end of valve component 4, and installing plate 2 is fixed on the outer wall on valve component 4 top.
As shown in Figure 3, Figure 4, gas control end 1 includes cylinder block 11, piston 12, sealing ring 13, small sealing ring 14, piston seat 15, large sealing packing ring 16 to the structure of gas control end 1.
The overall structure of cylinder block 11 is the internal cylindricality for cavity, and both ends open up and down, upper end open controls the trachea of this two position three-way valve for connecting, other parts of compartment improving inspiration by invigorating kidney-QI control end 1, cylinder block 11 has the air vent 17 running through sidewall, the lower sides of cylinder block 11 has multiple screw (in Fig. 3 not shown screw), in order to adopt screw and valve component to fix.
Piston 12 is arranged in cylinder block 11 internal cavities, and can move up and down in cylinder block 11, and the section of piston 12 is T-shaped, and piston 12 top is with push rod 121, and the inwall of push rod 121 and cylinder block 11 is slidably matched, and the sidewall band of push rod 121 is fluted.Wherein piston 12 is positioned at the part below push rod 121 is the cylindricality that external diameter is less, and its outer wall also has groove.The center of piston 12 has the circular hole running through piston up and down, and leave, on piston 12 bottom surface, the interconnection communicated with circular hole, circular hole and interconnection composition exhaust passage 18, namely the opening of lower end, exhaust passage 18 is laterally, exhaust passage 18 entirety presents " ⊥ " property, the purpose arranging exhaust passage 18 is to make the space above piston mandril 121 communicate with the space below piston, and when this " ⊥ " passage injects gases at high pressure, gases at high pressure will not directly impact valve block (see figure 10), it is to avoid infringement to valve block.
Sealing ring 13 is enclosed within push rod 121 groove of piston 12, and when piston up-down, sealing ring 13 plays sealing function, makes the spatial separation with lower section above push rod 121.Preferred sealing ring 13 is double-lip sealing ring, and sealing effectiveness is better.
Piston seat 15 also is located in cylinder block 11 internal cavities, the center drilling of piston seat 15, makes piston seat 15 be enclosed within the bottom of piston 12, and the outer wall of the inwall of piston seat 15 and piston 12 bottom is slidably matched.The inwall of the exterior side wall of piston seat 15 and cylinder block 11 is slidably matched, and has groove on the sidewall of piston seat 15.On the air vent 17 cylinder block 11 sidewall between push rod 121 and piston seat 15.
Small sealing ring 14 is enclosed within the groove of piston 12 bottom, seals the space between piston seat 15 inwall and piston 12 outer wall.
Large sealing packing ring 16 is enclosed within the groove of piston seat 15 sidewall, seals the space between piston seat 15 sidewall and cylinder block 11 inwall, and small sealing ring 14 and large sealing packing ring 16 seal jointly, make the spatial separation with lower section above piston seat 15.
By above structural design, cavity in cylinder block 11 piston mandril 121, sealing ring 13, piston seat 15, small sealing ring 14, large sealing packing ring 16 combined effect under, space in cylinder block 11 is divided into three parts: the space above push rod 121, the space between push rod 121 and piston seat 15, the space below piston seat 15, wherein the space above piston mandril 121 is connected by exhaust passage 18 with the space below piston seat 15, and the space between piston mandril 121 with piston seat 15 is connected with cylinder block 11 space outerpace by air vent 17.Therefore, when injecting gases at high pressure from cylinder block 11 upper end open, push rod 121 moves down under gas pressure, air between push rod 121 and piston seat 15 can be discharged by air vent 17, decrease the air drag of push rod 121, piston 12 motion, the gases at high pressure injected also can enter the space below piston seat 15, the spool in the valve component 4 of extruding lower section along exhaust passage 18.
The structure of installing plate 2 is as shown in Figure 5, Figure 6, installing plate 2 is made up of two parts of integration, it is annulus sidewall and the planar top being attached thereto respectively, annulus sidewall can wrap up valve component 4, with multiple sidewall long lumbar holes 21 on annulus sidewall, it is used for adopting screw that installing plate 2 is fixed on valve component 4.Installing plate 2 is securable to the top of valve component 4, as shown in Figure 1, it is possible to installing plate 2 is fixed on the bottom of valve component 4, as shown in Figure 7.After adopting long lumbar hole, it is possible to the positioning precision of the screw on reduction valve component 4, reduce manufacturing cost, ease of assembly.Also with multiple roof long lumbar holes 22 in planar top, for adopting screw that installing plate 2 is fixed on external device, adopting long lumbar hole design, the convenient and external world installs and fine setting.
As shown in Figure 8, spool 3 includes valve block 31, valve rod 32, lower disc 33, back-up ring 34, spring 35 to the structure of spool 3.Valve rod 32 is cylindricality, the fixing upper valve block 31 in top, and lower disc 33 is fixed in bottom, and valve rod 32 is fixing connects upper valve block 31 and lower disc 32, makes upper and lower valve block synchronization action.The flexible materials such as upper valve block 31 is rubber are made, and lower disc 33 is also adopted by the flexible materials such as rubber and makes, with upper valve block 31 the difference is that, with the hole of multiple up/down perforations on lower disc 33, in order to fluid is flowed to below lower disc 33 above lower disc 33 by this hole.
The bottom of valve rod 32 is provided with installing hole, and the top of spring 35 can be inserted in installing hole.
The annular that back-up ring 34 bends for edge, makes for flexible materials such as rubber, and back-up ring 34 is enclosed within valve rod 32 top, and back-up ring 34 is positioned at the lower section of valve block 31.
The structure of valve component 4 is as shown in Figure 9, valve component 4 includes valve body 41 and valve seat 42, the sidewall of valve body 41 has three valve ports (merely illustrating the second valve port 44 therein in Fig. 9), valve body 41 top is with multiple screws, for fixing gas control end 1 and installing plate 2, valve body 41 bottom is also with multiple screws, and for fixed valve base 42, installing plate 2 can also be fixed on valve body 41 bottom by screw.Adopt the mode that screw, screw are fixing, it is possible to accurately control the installation site of gas control end 1, valve seat etc..
The structure of valve body 41 is such as shown in Figure 10, Figure 11, Figure 12, and the center of valve body 41 is with through hole, and valve rod 32 is installed in this through hole, leaves the central passage 462 that can allow fluid flow between through-hole wall and valve rod 32.Having three valve ports on the sidewall of valve body 41, be first valve port the 43, second valve port the 44, the 3rd valve port 45 respectively, wherein the second valve port 44 is directly connected with the through hole at valve body 41 center, and namely the second valve port 44 connects with central passage 462.The upper end face of valve body 41 arranges the groove connected with central passage upper end open, and upper valve block 31 is positioned at the top of this groove and groove is completely covered, and bottom portion of groove is with first passage 461, and first passage 461 connects with the first valve port.The bottom surface of valve body 41 is with the groove connected with central passage lower ending opening, and lower disc 33 is positioned at the lower section of this groove and groove is completely covered, groove above with third channel 463, and third channel 463 connects with the 3rd valve port 45.
Valve seat 42 is fixed in the groove of valve body 41 bottom surface, valve seat 42 above for pit, and lower disc 33 is positioned at this pit, and the lower end of spring 35 is arranged on pit bottom center.
Structure after the assembling of the gas control end 1 of described air control binary three-way valve, installing plate 2, spool 3, valve component 4 is such as shown in Figure 10, Figure 11, Figure 12.The bottom of cylinder block 11 is installed in valve body 41 upper opening, adopts and is screwed.The interlude of valve rod 32 is positioned at the through hole at valve body 41 center, and the upper end of valve rod 32 can the lower end of contact piston 12.Upper valve block 31 is positioned at the opening on valve body 41 top, and the outward flange of upper valve block 31 is compressed by cylinder block 11.Back-up ring 34 is enclosed within the lower section of the top of valve rod 32, upper valve block 31, and back-up ring 34 is positioned at groove, tips upside down on above first passage 461, under normality, the gap that can enable flow through is there is between back-up ring 34 and groove floor, back-up ring 34 is arranged on above first passage 461, from the first valve port 43 flow into first passage 461 time, back-up ring 34 prevents the fluid erosion to upper valve block 31.Lower disc 33 is positioned at the opening of valve body 41 bottom, and the outward flange of lower disc 33 is held out against by valve seat 42.The upper end of spring 35 is positioned at the installing hole of valve rod 32 bottom, and lower end is installed on the bottom surface of valve seat 42 pit.
The upper opening of cylinder block 11 inwall, piston seat 15 bottom surface and valve body 41 surrounds one and closes space, and valve rod 32 upper end and upper valve block 31 are large enough to hold in this space, and valve rod 32, upper valve block 31 move upwardly without the obstruction by piston seat 15 bottom surface.In like manner, valve body 41 lower opening, valve seat 42 the pit that is arranged above with also be move downward headspace for valve rod 32, lower disc 33, will not the obstruction of rear valve base 42 when valve rod 32, lower disc 33 move down, in order to normally-open passage.
By above-mentioned spool 3, valve component 4, gas control end 1 overall construction design, assembling is simple, service life up to more than 400,000 times, the fluid pressure range width (0.015MPa～0.5MPa) that can bear in valve port, passage.
The work process of described air control binary three-way valve:
Under normality when gases at high pressure (cylinder block 11 upper end unimplanted): as shown in Figure 10, Figure 11, under spring 35 elastic force effect, push up against valve rod 32, valve rod 32 is jack-up piston 12 upwards, and meanwhile, valve rod 32 drives upper valve block 31, lower disc 33 to move upward, wherein lower disc 33 holds out against the lower ending opening of valve body 41 central passage, upper valve block 31 removes the upper end open of valve body 41 central passage, and back-up ring 34 upwards arches upward, and back-up ring can allow fluid flow for 34 times.Now the fluid at the 3rd valve port 45 place cannot flow into valve body central passage 462 from third channel 463, it is achieved the 3rd valve port 45 and the second valve port 44 cut off；The fluid at the first valve port 43 place can flow into central passage 462 from first passage 461, it is achieved the first valve port 43 connects with the second valve port 44.
Gases at high pressure are injected in cylinder block 11 upper end: under gases at high pressure effect, air pressure promotes the push rod 121 of piston 12 to move down, the lower end of piston 12 is pressed down against valve rod 32, valve rod drives upper valve block 31, lower disc 33 to move downward, wherein go up valve block 31 and compress the upper end open of the central passage 462 in valve body 41, gases at high pressure are pushed valve block 31 and are extruded back-up ring 34 below and make back-up ring 34 block first passage 461, and lower disc 33 removes the central passage lower ending opening in valve body 41.Now the fluid at the first valve port 43 place cannot flow into central passage 462 from first passage 461, it is achieved the first valve port 43 and the second valve port 44 cut off；The fluid at the 3rd valve port 45 place can flow into central passage 462 from third channel 463, it is achieved the 3rd valve port 45 connects with the second valve port 44.
Wherein, in push rod 121 folding process of piston 12, the air between push rod 121 and piston seat 15 is discharged by air vent 17, and the exhaust passage 18 that gases at high pressure can pass through in piston 12 enters below valve seat 15, above upper valve block 31, the upper valve block 31 of gases at high pressure extruding.Piston 12 lower end extruding valve rod 32, the upper valve block 31 of gases at high pressure extruding, two model of action carry out simultaneously, it is ensured that during the insufficient pressure of gases at high pressure, it is possible to promote spool 3 to move, cut off first passage 461 and central passage 462 completely, it is prevented that the fluid in the first valve port 43 flows into central passage 462.
When the gases at high pressure that cylinder block 11 upper end is injected are withdrawn: valve rod 32, piston 12, under spring 35 acts on, valve rod 32 move, returns to normality, and the first valve port 43 connects with the second valve port 44, and the 3rd valve port 45 and the second valve port 44 cut off.
Because arranging exhaust passage 18, if remaining gases at high pressure in cylinder block, space connection above piston 12, below piston seat 15, residual gases at high pressure also can enter below piston seat 15, residual gases at high pressure promote and move on piston seat 15, are equivalent to increase the space below piston seat 15, make the pressure of residual gases at high pressure reduce, reduce the resistance moved on valve rod 32, and the air between piston seat 15 and push rod 121 is discharged by air vent 17.
Claims (5)
- null1. with the two position three-way valve of gas control end，Including valve component、Spool，Valve component includes valve body and valve seat，Valve body upper end open，Valve body arranges three valve ports，The passage connecting valve port is set in valve body，Spool is positioned at valve body，Including valve rod and the upper valve block being fixed on valve rod two ends、Lower disc，It is characterized in that: described two position three-way valve also includes gas control end，Gas control end is arranged on valve body upper end，Gas control end includes cylinder block、Piston、Piston seat，Cylinder block upper and lower opening，Internal cavities arranges piston、Piston seat，The push rod of upper piston area and cylinder block are slidably matched，Piston mandril outer wall and cylinder block inwall are sealed by sealing ring，The piston seat being slidably matched with it it is set with outside the bottom of piston，Sealed by small sealing ring between piston and piston seat，Piston seat and cylinder block are slidably matched，Piston seat outer wall and cylinder block inwall are sealed by large sealing packing ring，Cylinder block outer wall between piston mandril and piston seat has the air vent running through cylinder block outer wall，Cylinder block upper end promotes piston after injecting gases at high pressure，Piston extruding valve rod，Valve rod drives upper valve block、Lower disc moves down，Connection or partition connect the passage of valve port.
- 2. the two position three-way valve with gas control end according to claim 1, it is characterised in that: having exhaust passage in piston, the opening of lower end, exhaust passage is laterally, and exhaust passage connects piston superjacent air space and piston seat underlying space.
- 3. the two position three-way valve with gas control end according to claim 1 and 2, it is characterized in that: valve component includes valve body, valve seat, valve seat is fixed on below valve body, and the central passage that can allow fluid flow, with through hole, is left in valve body center between through-hole wall and valve rod；Having three valve ports on the sidewall of valve body, be the first valve port, the second valve port, the 3rd valve port respectively, wherein the second valve port is directly connected with the through hole at valve body center；The upper end face of valve body arranges the groove connected with central passage, and upper valve block is positioned at the top of this groove and groove is completely covered, and gas control side pressure tightly goes up the outward flange of valve block, and bottom portion of groove is with first passage, first passage and the connection of the first valve port；The bottom surface of valve body is also with the groove connected with central passage, and lower disc is positioned at the lower section of this groove and groove is completely covered, the outward flange of seat compression lower disc, and the above of groove connects with third channel, third channel and the 3rd valve port；Spool includes valve block, valve rod, lower disc, spring, the fixing upper valve block in valve rod top, lower disc is fixed in bottom, upper valve block, lower disc adopt rubber to make, with the hole of multiple up/down perforations on lower disc, the bottom of valve rod arranges installing hole, and the top of spring can be inserted in installing hole, and lower end is positioned at valve seat top pit bottom；When valve rod moves down, upper valve block blocking central passage upper end, when valve rod moves, the lower end of lower disc blocking central passage.
- 4. the two position three-way valve with gas control end according to claim 3, it is characterized in that: described spool also includes flexible back-up ring, back-up ring is the annular of edge bending, and shield ring sleeve is on the top of valve rod, and back-up ring is positioned at the lower section of valve block and is buckled in above first passage.
- 5. the two position three-way valve with gas control end according to claim 1 and 2, it is characterized in that: described two position three-way valve also includes installing plate, the annulus sidewall that installing plate includes integral type and the planar top being attached thereto, annulus sidewall can wrap up valve component, with multiple long lumbar holes for fixedly mounting plate in annulus sidewall, planar top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410170350.2A CN103925391B (en) | 2014-04-25 | 2014-04-25 | Two position three-way valve with gas control end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410170350.2A CN103925391B (en) | 2014-04-25 | 2014-04-25 | Two position three-way valve with gas control end |
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| CN103925391A CN103925391A (en) | 2014-07-16 |
| CN103925391B true CN103925391B (en) | 2016-07-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104976178B (en) * | 2015-06-25 | 2017-01-25 | 苏州福艾斯振动系统有限公司 | Adjusting air cylinder |
| CN105508701B (en) * | 2015-10-07 | 2018-06-08 | 王大海 | A kind of reverse structure pilot valve |
| CN108473009A (en) * | 2016-01-13 | 2018-08-31 | 德纳重型车辆系统集团有限责任公司 | Valve module for tire pressure management system |
| CN106949295B (en) * | 2017-05-05 | 2022-11-29 | 南京消防器材股份有限公司 | Two-stage opening selection valve |
| CN107763303B (en) * | 2017-11-10 | 2023-07-04 | 浙江东星科技有限公司 | Air treatment unit with condensation function |
| CN110056673B (en) * | 2019-05-23 | 2024-04-26 | 四川芯智热控技术有限公司 | Piston type three-way valve structure |
| CN110195701B (en) * | 2019-06-28 | 2024-03-19 | 义乌鸿川科技有限公司 | Positive and negative pressure automatic switching valve of oil-free mute air compressor |
| CN111609148A (en) * | 2020-05-15 | 2020-09-01 | 湖北三江航天红峰控制有限公司 | Ultralow-temperature pneumatic stop valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| NO742038L (en) * | 1973-06-08 | 1975-01-06 | Sigge Rydberg | |
| US4615353A (en) * | 1984-01-24 | 1986-10-07 | Mckee James E | Pneumatic control valves with diaphragm actuators and modular body structure |
| CN101373029A (en) * | 2008-10-21 | 2009-02-25 | 上海宏翔机械制造有限公司 | Pneumatic two-position three-way fluid control valve |
| CN201696664U (en) * | 2010-05-17 | 2011-01-05 | 费斯托(中国)有限公司 | Two-position three-way pneumatic control valve |
| CN103032602A (en) * | 2012-12-28 | 2013-04-10 | 奥士奥控制阀门(上海)有限公司 | Pneumatic corrugated pipe type three-way adjusting valve |
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