CN103925391A - Two-position three-way valve with air control end - Google Patents
Two-position three-way valve with air control end Download PDFInfo
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- CN103925391A CN103925391A CN201410170350.2A CN201410170350A CN103925391A CN 103925391 A CN103925391 A CN 103925391A CN 201410170350 A CN201410170350 A CN 201410170350A CN 103925391 A CN103925391 A CN 103925391A
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- seat
- valve body
- block
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- 238000007789 sealing Methods 0.000 claims abstract description 19
- 239000012530 fluid Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 4
- 239000002360 explosive Substances 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 238000010276 construction 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
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 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
Abstract
The invention discloses a two-position three-way valve with an air control end. The two-position three-way valve comprises a valve body component and a valve element. The valve body component comprises a valve body and a valve base. An opening is formed in the upper end of the valve body. Three valve openings are formed in the valve body. Channels connected with the valve openings are arranged in the valve body. The valve element is arranged in the valve body and comprises a valve rod, an upper valve piece, a lower valve piece and the air control end. The upper valve piece and the lower valve piece are fixed at the two ends of the valve rod. The air control end is arranged at the upper end of the valve body. The air control end comprises an air cylinder body, a piston and a piston base. Openings are formed in the upper portion and the lower portion of the air cylinder body. A piston and a piston base are arranged in an inner cavity. A pushing rod at the upper portion of the piston is matched with the air cylinder body in a sliding mode. The outer wall of the pushing rod of the piston and the inner wall of the air cylinder body are sealed through a sealing ring. The piston base matched with the piston in a sliding mode is arranged outside the lower portion of the piston in a sleeved mode. The piston and the piston base are sealed through a small sealing ring. The piston base and the air cylinder body are matched in a sliding mode. The outer wall of the piston base and the inner wall of the air cylinder body are sealed through a large sealing ring. An air discharging hole which penetrates through the outer wall of the air cylinder body is formed in the outer wall of the air cylinder body between the piston pushing rod and the piston base.
Description
Technical field
The present invention relates to a kind of pneumatic valve, relate in particular to a kind of two-position three way pneumatic valve that is provided with gas control end.
Background technique
In industrial pipeline field, two-position three way pneumatic valve is widely used at present, its main structure is the valve port that three inflows or eluting gas or liquid are set on valve body, movably spool is set in valve body, valve inner arranges the passage that connects three valve ports, by the break-make of passage between the positioning control valve body internal valve mouth of change spool, fluid is come in and gone out from different valve ports, spool is injected the pressurized gas effect of valve body and is moved, the pneumatic of two-position three way pneumatic valve indication refers to that spool is by drive of high-pressure gas, two refer to that spool has two positions controlled, threeway is that three valve ports are set on a valve body.
There are some defects in existing two-position three way pneumatic valve: 1, during drive of high-pressure gas spool, pressurized gas directly act on spool and make valve core movement, spool generally includes valve rod, valve block, the direct dash valve sector-meeting infringement of pressurized gas valve block, in addition, air pressure hour cannot promote valve rod and move, and passage is break-make completely, causes fluid leaks; During 2, without pressurized gas, the movement of spool is subject to the effect of residual pressurized gas in valve body, and spool moving resistance is large, is therefore necessary to improve.
Summary of the invention
Technical problem to be solved by this invention is to overcome the above-mentioned deficiency of prior art and a kind of two position three-way valve with gas control end is provided, and spool is moved flexibly, control valve body fluid passage break-make completely, and reliability is strong, prevents seepage, and simple in structure.
The present invention addresses the above problem adopted technological scheme: with the two position three-way valve of gas control end, comprise valve component, spool, valve component comprises valve body and valve seat, valve body upper end open, three valve ports are set on valve body, the passage that connects valve port is set in valve body, spool is positioned at valve body, comprise valve rod and be fixed on the upper valve block at valve rod two ends, lower valve, described two position three-way valve also comprises gas control end, gas control end is arranged on valve body upper end, gas control end comprises cylinder block, piston, piston seat, cylinder block upper and lower opening, piston is set in internal cavities, piston seat, push rod and the cylinder block on piston top are slidably matched, piston mandril outer wall and cylinder block inwall are sealed by seal ring, the piston seat that outside the bottom of piston, suit is slidably matched with it, between piston and piston seat, by small sealing ring, sealed, piston seat and cylinder block are slidably matched, piston seat outer wall and cylinder block inwall are sealed by big sealing ring, in cylinder block outer wall between piston mandril and piston seat, have the vent hole that runs through cylinder block outer wall, cylinder block upper end promotes piston after injecting pressurized gas, piston lower end extruding valve rod, valve rod drives upper valve block, lower valve moves down, be communicated with or cut off the passage that connects valve port.
In the piston of further optimizing, have exhaust passage, the opening of lower end, exhaust passage is laterally, and exhaust passage is communicated with side space under piston superjacent air space and piston seat.
Above-mentioned valve component comprises valve body, valve seat, and valve seat is fixed on valve body below, and the central passage that can make fluid flow through, with through hole, is left in valve body center between through-hole wall and valve rod; On the sidewall of valve body, having three valve ports, is respectively the first valve port, the second valve port, the 3rd valve port, and wherein the through hole at the second valve port and valve body center is directly connected; The groove that the upper end face setting of valve body is communicated with central passage, upper valve block is positioned at the top of this groove and covers groove completely, and gas control side pressure tightly goes up the outward edge of valve block, and bottom portion of groove is with first passage, and first passage is communicated with the first valve port; The bottom surface of valve body is also with the groove being communicated with central passage, and lower valve is positioned at the below of this groove and covers groove completely, and valve seat compresses the outward edge of lower valve, and above groove, with third channel, third channel is communicated with the 3rd valve port.
Spool comprises valve block, valve rod, lower valve, spring, the fixing upper valve block in valve rod top, bottom is lower valve fixedly, upper valve block, lower valve adopt the flexible materials such as rubber to make, on lower valve with the hole of a plurality of up/down perforations, the bottom of valve rod arranges mounting hole, and the top of spring can be inserted in mounting hole, and lower end is positioned at valve seat top pit bottom.
When valve rod moves down, upper valve block stops up central passage upper end, and while moving on valve rod, lower valve stops up the lower end of central passage.
Above-mentioned spool also comprises flexible back-up ring, and back-up ring is the ring of edge bending, and shield ring sleeve is on the top of valve rod, and back-up ring is positioned at the below of valve block and is buckled in first passage top.
Above-mentioned two position three-way valve also comprises mounting plate, and mounting plate comprises the annulus sidewall of integral type and the planar top being attached thereto, and annulus sidewall can wrap up valve component, in annulus sidewall, planar top with a plurality of long lumbar holes for mounting plate.
Compared with prior art, the invention has the advantages that: 1, gas control end is installed in valve component upper end, is driven the pressurized gas of this valve to enter cylinder block from the upper end of gas control end, promote piston extruding spool, avoid pressurized gas directly to impact spool; The outer wall of cylinder block arranges vent hole, and when piston, piston seat move, the air between piston mandril and piston seat can be discharged by vent hole, has reduced the resistance that piston, piston seat move.When 2, piston moves down, piston lower end extruding valve rod, exhaust passage is communicated with side space under piston superjacent air space and piston seat, make pressurized gas also can enter piston seat below, pressurized gas and piston push spool simultaneously, guarantee that spool is hour also removable at air pressure, control the break-make of fluid passage completely, prevent seepage.3, when valve rod moves up, if remain pressurized gas in cylinder block, because exhaust passage is set, push rod top is communicated with the gas of piston seat below, and residual pressurized gas also can enter piston seat below, and residual pressurized gas promote to move on piston seat, be equivalent to increase the space of piston seat below, make the pressure decreased of residual pressurized gas, and air between piston seat and push rod is discharged by vent hole, reduce the resistance moving on valve rod.4, flexible back-up ring is set between upper valve block and first passage, prevents valve block on fluid erosion, also can reduce the infringement of valve body to upper valve block.5, on lower valve with a plurality of holes, the fluid in third channel can flow into valve seat pit by this hole, prevent fluid erosion lower valve, can prevent that again fluid impact lower valve from move down valve rod.6, mounting plate can be fixed on top or the bottom of valve component, and mounting point is flexible, and long lumbar hole is convenient to install.
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 mounting plate.
Fig. 6 is the plan view of mounting plate shown in Fig. 5.
Fig. 7 is the schematic diagram of another mounting point of mounting 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 pseudosection 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, seal ring, 14, small sealing ring, 15, piston seat, 16, big sealing ring, 17, vent hole, 18, exhaust passage; 2, mounting plate, 21, sidewall long lumbar hole, 22, roof long lumbar hole; 3, spool, 31, upper valve block, 32, valve rod, 33, lower valve, 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.
Embodiment
Below in conjunction with accompanying drawing, embodiment, the present invention is further described.
Embodiment, two position three-way valve, comprises gas control end 1, mounting plate 2, spool 3 and valve component 4 as shown in Figure 1 and Figure 2, and spool 3 is installed on valve component 4 inside, gas control end 1 is installed on the upper end of valve component 4, and mounting plate 2 is fixed on the outer wall on valve component 4 tops.
As shown in Figure 3, Figure 4, gas control end 1 comprises cylinder block 11, piston 12, seal ring 13, small sealing ring 14, piston seat 15, big sealing ring 16 to the structure of gas control end 1.
The overall structure of cylinder block 11 is that inside is the cylindricality of cavity, and upper and lower both ends open, upper end open is for connecting the tracheae of controlling this two position three-way valve, other component that hold gas control end 1 in cavity, in cylinder block 11, have the vent hole 17 that runs through sidewall, the lower sides of cylinder block 11 has a plurality of screws (not shown screw in Fig. 3), to adopt screw and valve component to fix.
Piston 12 is arranged in cylinder block 11 internal cavities, and can in cylinder block 11, move up and down, and the section of piston 12 is T-shaped, and piston 12 tops are with push rod 121, and push rod 121 is slidably matched with the inwall of cylinder block 11, and the sidewall band of push rod 121 is fluted.Wherein to be positioned at the part of push rod 121 belows be the cylindricality that external diameter is less to piston 12, and its outer wall also has groove.Piston 12 center has the circular hole that runs through up and down piston, and leave the crosspassage communicating with circular hole on piston 12 bottom surfaces, circular hole and crosspassage form exhaust passage 18, namely the opening of 18 lower ends, exhaust passage is horizontal, exhaust passage 18 integral body present " ⊥ " property, the object that exhaust passage 18 is set is that the space of piston mandril 121 tops is communicated with the space of piston below, and while injecting pressurized gas in this " ⊥ " passage, pressurized gas can directly not impact valve block (see figure 10), have avoided the infringement to valve block.
Seal ring 13 is enclosed within push rod 121 grooves of piston 12, and when piston up-down, seal ring 13 plays seal action, makes the space isolation of push rod 121 tops and below.Preferred seal ring 13 is double-lip sealing ring, and sealing effect is better.
Piston seat 15 is also arranged in cylinder block 11 internal cavities, and the center drilling of piston seat 15 make 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 bottoms 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.Vent hole 17 is on cylinder block 11 sidewalls between push rod 121 and piston seat 15.
Small sealing ring 14 is enclosed within the groove of piston 12 bottoms, the space between packed-piston seat 15 inwalls and piston 12 outer walls.
Big sealing ring 16 is enclosed within the groove of piston seat 15 sidewalls, the space between packed-piston seat 15 sidewalls and cylinder block 11 inwalls, and small sealing ring 14 seals jointly with big sealing ring 16, makes the space isolation of piston seat 15 tops and below.
By above structural design, cavity in cylinder block 11 is under the acting in conjunction of piston mandril 121, seal ring 13, piston seat 15, small sealing ring 14, big sealing ring 16, space in cylinder block 11 is divided into three parts: the space of the space between the space of push rod 121 tops, push rod 121 and piston seat 15, piston seat 15 belows, wherein the space of piston mandril 121 tops is communicated with by exhaust passage 18 with the space of piston seat 15 belows, and piston mandril 121 is communicated with cylinder block 11 space outerpaces by vent hole 17 with the space between piston seat 15.Therefore, when injecting pressurized gas 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 vent hole 17, reduced the resistance of air that push rod 121, piston 12 move, the pressurized gas that inject also can be along exhaust passage 18 spaces that enter piston seat 15 belows, the spool in the valve component 4 of extruding below.
The structure of mounting plate 2 as shown in Figure 5, Figure 6, mounting plate 2 is comprised of integrated two-part, respectively annulus sidewall and the planar top being attached thereto, annulus sidewall can wrap up valve component 4, on annulus sidewall with a plurality of sidewall long lumbar holes 21, for adopting screw that mounting plate 2 is fixed on to valve component 4.Mounting plate 2 can be fixed on the top of valve component 4, as shown in Figure 1, also mounting plate 2 can be fixed on to the bottom of valve component 4, as shown in Figure 7.Adopt after long lumbar hole, can reduce the positioning precision of the screw on valve component 4, reduce manufacture cost, ease of assembly.In planar top, also with a plurality of roof long lumbar holes 22, for adopting screw that mounting plate 2 is fixed on to external device, adopt long lumbar hole design, convenient and extraneous installation and fine setting.
As shown in Figure 8, spool 3 comprises valve block 31, valve rod 32, lower valve 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 bottom is lower valve 33 fixedly, and valve rod 32 is fixedly connected with valve block 31 and lower valve 32, makes upper and lower valve block synchronization motion.The flexible materials such as upper valve block 31 is rubber are made, lower valve 33 also adopts the flexible materials such as rubber to make, different from upper valve block 31, on lower valve 33 with the hole of a plurality of up/down perforations, so that fluid flows to lower valve 33 belows by this hole from lower valve 33 tops.
The bottom of valve rod 32 is provided with mounting hole, and the top of spring 35 can be inserted in mounting hole.
Back-up ring 34 is the ring of edge bending, and for the flexible materials such as rubber are made, back-up ring 34 is enclosed within valve rod 32 tops, and back-up ring 34 is positioned at the below of valve block 31.
The structure of valve component 4 as shown in Figure 9, valve component 4 comprises valve body 41 and valve seat 42, on the sidewall of valve body 41, have three valve ports (only showing the second valve port 44 wherein in Fig. 9), valve body 41 tops are with a plurality of screws, be used for fixedly gas control end 1 and mounting plate 2, valve body 41 bottoms are also with a plurality of screws, and for fixed valve base 42, mounting plate 2 also can be fixed on valve body 41 bottoms by screw.Adopt screw, the fixing mode of screw, can accurately control the mounting point of gas control end 1, valve seat etc.
The structure of valve body 41 is as shown in Figure 10, Figure 11, Figure 12, and valve body 41 center is with through hole, and valve rod 32 is installed in this through hole, leaves the central passage 462 that can make fluid flow through between through-hole wall and valve rod 32.On the sidewall of valve body 41, having three valve ports, is respectively the first valve port 43, the second valve port 44, the 3rd valve port 45, and wherein the second valve port 44 is directly connected with the through hole at valve body 41 centers, and namely the second valve port 44 is communicated with central passage 462.The groove that the upper end face setting of valve body 41 is communicated with central passage upper end open, upper valve block 31 is positioned at the top of this groove and covers groove completely, and bottom portion of groove is with first passage 461, and first passage 461 is communicated with the first valve port.The bottom surface of valve body 41 is with the groove being communicated with central passage lower ending opening, and lower valve 33 is positioned at the below of this groove and covers groove completely, and above groove, with third channel 463, third channel 463 is communicated with the 3rd valve port 45.
Valve seat 42 is fixed in the groove of valve body 41 bottom surfaces, above valve seat 42, is pit, and lower valve 33 is positioned at this pit, and the lower end of spring 35 is arranged on pit bottom center.
Structure after the gas control end 1 of described air control binary three-way valve, mounting plate 2, spool 3, valve component 4 assemblings is as shown in Figure 10, Figure 11, Figure 12.The bottom of cylinder block 11 is installed in valve body 41 upper openings, adopts and is screwed.The intermediate section of valve rod 32 is positioned at the through hole at valve body 41 centers, the lower end that the upper end of valve rod 32 can contact piston 12.Upper valve block 31 is positioned at the opening on valve body 41 tops, and the outward edge of upper valve block 31 is compressed by cylinder block 11.Back-up ring 34 is enclosed within the top of valve rod 32, the below of upper valve block 31, and back-up ring 34 is positioned at groove, tips upside down on first passage 461 tops, under normality, between back-up ring 34 and groove floor, there is the gap that can make fluid pass through, back-up ring 34 is arranged on first passage 461 tops, while flowing into first passage 461 from the first valve port 43, back-up ring 34 prevents the erosion of fluid to upper valve block 31.Lower valve 33 is positioned at the opening of valve body 41 bottoms, and the outward edge of lower valve 33 is held out against by valve seat 42.The upper end of spring 35 is positioned at the mounting hole of valve rod 32 bottoms, and lower end is installed on the bottom surface of valve seat 42 pits.
The upper opening of cylinder block 11 inwalls, piston seat 15 bottom surfaces and valve body 41 surrounds an enclosed space, and valve rod 32 upper ends and upper valve block 31 are large enough to hold in this space, and valve rod 32, upper valve block 31 Shi Buhui that moves up is subject to the obstruction of piston seat 15 bottom surfaces.In like manner, valve body 41 lower opening, valve seat 42 above pit to be set be also for valve rod 32, lower valve 33 move downward headspace, obstruction that can rear valve base 42 when valve rod 32, lower valve 33 move down, so that normal open channel.
By the overall construction design of above-mentioned spool 3, valve component 4, gas control end 1, assembling is simple, can reach more than 400,000 times the hydrodynamic pressure wide ranges (0.015MPa～0.5MPa) that can bear in valve port, passage working life.
The working procedure of described air control binary three-way valve:
Under normality (when pressurized gas are not injected in cylinder block 11 upper ends): as shown in Figure 10, Figure 11, under spring 35 elastic force effects, upwards push valve rod 32, valve rod 32 is jack-up piston 12 upwards, and meanwhile, valve rod 32 drives upper valve block 31, lower valve 33 to move upward, wherein lower valve 33 holds out against the lower ending opening of valve body 41 central passages, upper valve block 31 is removed the upper end open of valve body 41 central passages, and back-up ring 34 upwards arches upward, and back-up ring can make for 34 times fluid flow through.Now the fluid at the 3rd valve port 45 places cannot flow into valve body central passage 462 from third channel 463, realizes the 3rd valve port 45 and the second valve port 44 partitions; The fluid at the first valve port 43 places can flow into central passage 462 from first passage 461, realizes the first valve port 43 and is communicated with the second valve port 44.
Pressurized gas are injected in cylinder block 11 upper ends: under pressurized gas effect, the push rod 121 that air pressure promotes piston 12 moves down, the lower end of piston 12 is pushed valve rod 32 downwards, valve rod drives upper valve block 31, lower valve 33 to move downward, wherein go up the upper end open that valve block 31 compresses the central passage 462 in valve body 41, the back-up ring 34 that pressurized gas are pushed valve block 31 its belows of extruding makes back-up ring 34 stop up first passage 461, and lower valve 33 is removed the central passage lower ending opening in valve body 41.Now the fluid at the first valve port 43 places cannot flow into central passage 462 from first passage 461, realizes the first valve port 43 and the second valve port 44 partitions; The fluid at the 3rd valve port 45 places can flow into central passage 462 from third channel 463, realizes the 3rd valve port 45 and is communicated with the second valve port 44.
Wherein, in push rod 121 folding processes of piston 12, air between push rod 121 and piston seat 15 is discharged by vent hole 17, and pressurized gas can enter by the exhaust passage 18 in piston 12 valve seat 15 belows, upper valve block 31 tops, the upper valve block 31 of pressurized gas extruding.Piston 12 lower end extruding valve rods 32, the upper valve block 31 of pressurized gas extruding, two modes of action are carried out simultaneously, while guaranteeing the underpressure of pressurized gas, also can promote spool 3 and move, cut off first passage 461 and central passage 462 completely, prevent that the fluid in the first valve port 43 from flowing into central passage 462.
When the pressurized gas that cylinder block 11 upper ends are injected are withdrawn: valve rod 32, piston 12, under spring 35 effects, move on valve rod 32, return to normality, and the first valve port 43 is communicated with the second valve port 44, the 3rd valve port 45 and the second valve port 44 cut off.
Because exhaust passage 18 is set, if remain pressurized gas in cylinder block, the space of piston 12 tops, piston seat 15 belows is communicated with, residual pressurized gas also can enter piston seat 15 belows, residual pressurized gas promote to move on piston seat 15, have been equivalent to increase the space of piston seat 15 belows, make the pressure decreased of residual pressurized gas, reduce the resistance moving on valve rod 32, and the air of 121 of piston seat 15 and push rods is discharged by vent hole 17.
Claims (5)
1. with the two position three-way valve of gas control end, comprise valve component, spool, valve component comprises valve body and valve seat, valve body upper end open, three valve ports are set on valve body, the passage that connects valve port is set in valve body, spool is positioned at valve body, comprise valve rod and be fixed on the upper valve block at valve rod two ends, lower valve, it is characterized in that: described two position three-way valve also comprises gas control end, gas control end is arranged on valve body upper end, gas control end comprises cylinder block, piston, piston seat, cylinder block upper and lower opening, piston is set in internal cavities, piston seat, push rod and the cylinder block on piston top are slidably matched, piston mandril outer wall and cylinder block inwall are sealed by seal ring, the piston seat that outside the bottom of piston, suit is slidably matched with it, between piston and piston seat, by small sealing ring, sealed, piston seat and cylinder block are slidably matched, piston seat outer wall and cylinder block inwall are sealed by big sealing ring, in cylinder block outer wall between piston mandril and piston seat, have the vent hole that runs through cylinder block outer wall, cylinder block upper end promotes piston after injecting pressurized gas, piston lower end extruding valve rod, valve rod drives upper valve block, lower valve moves down, be communicated with or cut off the passage that connects valve port.
2. the two position three-way valve with gas control end according to claim 1, is characterized in that: in piston, have exhaust passage, the opening of lower end, exhaust passage is laterally, and exhaust passage is communicated with side space under piston superjacent air space and piston seat.
3. the two position three-way valve with gas control end according to claim 1 and 2, it is characterized in that: valve component comprises valve body, valve seat, valve seat is fixed on valve body below, and the central passage that can make fluid flow through, with through hole, is left in valve body center between through-hole wall and valve rod; On the sidewall of valve body, having three valve ports, is respectively the first valve port, the second valve port, the 3rd valve port, and wherein the through hole at the second valve port and valve body center is directly connected; The groove that the upper end face setting of valve body is communicated with central passage, upper valve block is positioned at the top of this groove and covers groove completely, and gas control side pressure tightly goes up the outward edge of valve block, and bottom portion of groove is with first passage, and first passage is communicated with the first valve port; The bottom surface of valve body is also with the groove being communicated with central passage, and lower valve is positioned at the below of this groove and covers groove completely, and valve seat compresses the outward edge of lower valve, and above groove, with third channel, third channel is communicated with the 3rd valve port;
Spool comprises valve block, valve rod, lower valve, spring, the fixing upper valve block in valve rod top, bottom is lower valve fixedly, upper valve block, lower valve adopt the flexible materials such as rubber to make, on lower valve with the hole of a plurality of up/down perforations, the bottom of valve rod arranges mounting hole, and the top of spring can be inserted in mounting hole, and lower end is positioned at valve seat top pit bottom;
When valve rod moves down, upper valve block stops up central passage upper end, and while moving on valve rod, lower valve stops up the lower end of 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 comprises flexible back-up ring, back-up ring is the ring of edge bending, and shield ring sleeve is on the top of valve rod, and back-up ring is positioned at the below of valve block and is buckled in first passage top.
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 comprises mounting plate, mounting plate comprises the annulus sidewall of integral type and the planar top being attached thereto, annulus sidewall can wrap up valve component, in annulus sidewall, planar top with a plurality of long lumbar holes for mounting plate.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103925391A true CN103925391A (en) | 2014-07-16 |
| CN103925391B CN103925391B (en) | 2016-07-06 |
Family
ID=51143710
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410170350.2A Active CN103925391B (en) | 2014-04-25 | 2014-04-25 | Two position three-way valve with gas control end |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976178A (en) * | 2015-06-25 | 2015-10-14 | 苏州福艾斯振动系统有限公司 | Novel adjusting air cylinder |
| CN105508701A (en) * | 2015-10-07 | 2016-04-20 | 王大海 | Pilot valve with reverse structure |
| CN106949295A (en) * | 2017-05-05 | 2017-07-14 | 南京消防器材股份有限公司 | A kind of two-stage opens selector valve |
| CN107763303A (en) * | 2017-11-10 | 2018-03-06 | 浙江东星科技有限公司 | A kind of air conditioner unit of band condensation |
| 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 |
| CN110056673A (en) * | 2019-05-23 | 2019-07-26 | 成都富临精工电子电器科技有限公司 | A kind of piston type threeway valve arrangement |
| CN110195701A (en) * | 2019-06-28 | 2019-09-03 | 义乌鸿川科技有限公司 | A kind of oil-free silent air compressor positive/negative-pressure automatic switching valve |
| 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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| 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 |
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| 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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| US4615353A (en) * | 1984-01-24 | 1986-10-07 | Mckee James E | Pneumatic control valves with diaphragm actuators and modular body structure |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976178A (en) * | 2015-06-25 | 2015-10-14 | 苏州福艾斯振动系统有限公司 | Novel adjusting air cylinder |
| CN105508701A (en) * | 2015-10-07 | 2016-04-20 | 王大海 | Pilot valve with reverse structure |
| 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 |
| CN106949295A (en) * | 2017-05-05 | 2017-07-14 | 南京消防器材股份有限公司 | A kind of two-stage opens selector valve |
| 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 |
| CN107763303A (en) * | 2017-11-10 | 2018-03-06 | 浙江东星科技有限公司 | A kind of air conditioner unit of band condensation |
| CN107763303B (en) * | 2017-11-10 | 2023-07-04 | 浙江东星科技有限公司 | Air treatment unit with condensation function |
| CN110056673A (en) * | 2019-05-23 | 2019-07-26 | 成都富临精工电子电器科技有限公司 | A kind of piston type threeway valve arrangement |
| CN110195701A (en) * | 2019-06-28 | 2019-09-03 | 义乌鸿川科技有限公司 | A kind of oil-free silent air compressor positive/negative-pressure automatic switching valve |
| 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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| CN103925391B (en) | 2016-07-06 |
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