CN201787148U - Pneumatic constant pressure valve - Google Patents
Pneumatic constant pressure valve Download PDFInfo
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- CN201787148U CN201787148U CN2010205279738U CN201020527973U CN201787148U CN 201787148 U CN201787148 U CN 201787148U CN 2010205279738 U CN2010205279738 U CN 2010205279738U CN 201020527973 U CN201020527973 U CN 201020527973U CN 201787148 U CN201787148 U CN 201787148U
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Abstract
A pneumatic constant pressure valve comprises a valve body and a valve cap matched with the valve body in a sealing manner, wherein an outer margin is clamped between the valve body and the valve cap, a seal diaphragm capable of moving up and down under the work state is arranged at the rest part, and a through hole is formed in the middle of the seal diaphragm; an air inlet and an air inlet standard component 1 used for sealing the air inlet are formed on the valve cap, and a through hole is formed in the middle of the valve cap; an liquid inlet is formed on the side wall of the valve body, and a liquid outlet is formed at the bottom of the valve body; and a valve core rod penetrates through the through-hole on the valve cap and the through hole of the seal diaphragm in a sealed manner and extends in the valve body, a valve plug sealed and matched with the liquid outlet is arranged at the lower end of valve core rod, and when moving upwardly, the seal diaphragm drives the valve core rod to move upwardly through a link mechanism, so as to separate the valve plug from the liquid outlet. The pneumatic constant pressure valve with good constant pressure effect can meet the requirement for mass production, realize the controls of valve opening, the liquid flow and the liquid pressure at the outlet under the working condition of the valve without frequent component replacement, and is also adapt to different liquid environments.
Description
Technical field
The utility model relates to a kind of valve, specifically a kind of Pneumatic constant pressure valve that is used in the health product manufacturing processes such as beer, beverage and medicine.
Background technique
Valve is extensively applied in the manufacturing process of health products such as beer, beverage and medicine as the relay and control structure in the fluid dispensing process.Chinese patent literature CN2474848Y discloses a kind of liquid stabilizing valve, comprise housing, there are water intake and water outlet in the housing two ends, the housing upper end is equipped with sealing cover, the sealing cover middle part is equipped with the pressure adjusting nut, between sealing cover and the housing liquid sealing be equipped with glue every, glue is equipped with glue every gusset plate every upper surface, glue is equipped with connecting rod every last liquid sealing, between pressure adjusting nut and connecting rod pressure spring is installed, and the lower hinge of connecting rod has the braking tongue, the afterbody of braking tongue is connected with and moves shelves, move the shelves front end and be installed with the sealing plug, described sealing plug has tapering, and the sealing plug matches with water intake.Described pressure maintaining valve is at first set steady pressure in the valve by the pressure adjusting nut, because the elastic restoring force of pressure spring promotes the sealing plug and water intake is separated, thereby open water intake, when the continuous increase of the pressure in the valve surmounts the steady pressure of setting, glue every on move pressure spring, thereby under the linking mechanism effect of (referring to connecting rod, braking tongue and mobile shelves) gap between plug and the water intake is dwindled again, inflow reduces; When water outlet is closed, outside water supply increases the pressure in the valve body, force glue every on move, spring is compressed, drive linking mechanism (referring to connecting rod, braking tongue and mobile shelves) motion, move thereby drive in the sealing plug, water intake is air-tight state with the sealing plug, thereby makes the interior pressure that keeps setting of valve.This valve has been realized the constant pressure in the valve to a certain extent.But still there is following defective in this technological scheme in concrete application process:
The one, adopts this technological scheme, in working order, if when the pressure in the valve body increases to greater than predefined pressure, then seal plug and clog liquid entering hole under the effect of spring and linking mechanism, the valve internal pressure reduces, then liquid outlet pressure reduces, seal plug and be opened under spring and linking mechanism effect this moment, and then the valve body internal pressure increases again, and liquid outlet pressure also increases, therefore the pressure of liquid outlet is in the scope of a fluctuation, and voltage regulation result is bad.In addition, adopt this technological scheme, when liquid entering hole was closed plug and clogs, inlet hydraulic will hinder the sealing plug to be opened, and under extreme case, the sealing plug can not be opened when inlet hydraulic is excessive, thereby can not guarantee the continuous operation of valve.
This technological scheme of the 2nd, drives linking mechanism motion to glue every the active force that produces different direction by the elongation and the compression of spring, thereby adjust the position relation of sealing plug and liquid entering hole, yet the working life of a spring, the spring precision also can be along with reduce service time gradually about several ten thousand times.
The model utility content
For this reason, technical problem to be solved in the utility model is: overcome the scope that the pressure of liquid outlet in the prior art is in fluctuation, and the technological deficiency that voltage regulation result is bad, thus provide a kind of voltage regulation result good pressure maintaining valve;
Another technical problem to be solved in the utility model is: overcome in the prior art use spring regulate and the life-span of spring limited, need the frequent technological deficiency of changing, thereby a kind of pressure maintaining valve easy and simple to handle that does not need frequently to change parts be provided.
Thereby propose a kind of pressure that does not need frequently to change parts and can make liquid outlet and keep the constant good pressure maintaining valve of voltage regulation result.
Pneumatic constant pressure valve of the present utility model comprises: valve body, be spill, and have a valve body mounting edge, centre is provided with liquid outlet, and the next door of described liquid outlet is provided with liquid entering hole; Valve gap, be spill, has the valve gap mounting edge that cooperates with described valve body mounting edge linkage structure, the position seals corresponding with described liquid outlet in the central authorities of described valve gap is provided with a hollow mounting pipe regularly, described hollow mounting pipe is passed described valve gap middle part, and the center-aligned of axial and described liquid outlet; On described valve gap, also be provided with suction port;
Seal dissepiment, its edge are clamped between described valve body mounting edge and the described valve gap mounting edge hermetically, make to form the elastic packing air cavity between described valve gap and the described seal dissepiment, form fluid chamber between described valve body and the described seal dissepiment; The middle part of described seal dissepiment has mounting hole; A valve core rod, sealing is slidably mounted in the described hollow mounting pipe, and the described mounting hole at described seal dissepiment middle part is passed at its middle part, and fixedlys connected hermetically with described seal dissepiment; A valve plug is fixedly mounted on described valve core rod near on the end of described liquid outlet, and described valve plug is separated with described liquid outlet under normal conditions; It is characterized in that: described liquid outlet links to each other with a pressure-detecting device; Described suction port links to each other with a control air source equipment.
Described valve core rod comprises center-pole and mounting sleeve, be provided with radially outstanding bar flange at the middle part of described center-pole, described mounting sleeve is arranged on described center-pole and closes on the described hollow mounting pipe outer wall partly, clamps hermetically between described mounting sleeve and the described annular flange flange and establishes described seal dissepiment.
Described mounting sleeve forms radially outstanding Pipe Flange near the end of described seal dissepiment, described Pipe Flange and described bar flange on the face of described seal dissepiment, respectively form an annular groove, the relevant position on two surfaces of described seal dissepiment be provided with one with the described groove annular boss to upper process of clamping mutually.
Described seal dissepiment is by the elastic sealing strip that is positioned at its both side surface, and the movable plate between two described elastic sealing strips is formed; Be arranged with a collar on the described valve core rod between described bar flange and the described Pipe Flange, the lateral margin of the close described valve core rod of described movable plate snaps in the described collar and with described lower sealing piece and fits.
The circle that described movable plate is made up of a plurality of fanning strips, described fanning strip is made of metal.
The cross section of described valve body is circular or oval.
Be positioned at the arc structure of the described valve core rod employing of described valve body part to medial axis direction symmetry indent.
Described valve plug comprises a leg that links to each other with the end of described valve core rod in described valve body, forms two slits on the described leg at least, and described slit is narrower near described valve core rod one side, and broadens gradually to opposite side.
The profile line in described slit is that the axis of the described relatively valve core rod in two ends is mild, and the steeper horizontal sliding wheel profile of intermediate portion.
Described slit is four, and evenly distributes.
Pneumatic constant pressure valve of the present utility model has the following advantages:
1. Pneumatic constant pressure valve of the present utility model comprises: valve body, be spill, and have a valve body mounting edge, centre is provided with liquid outlet, and the next door of described liquid outlet is provided with liquid entering hole; Valve gap, be spill, has the valve gap mounting edge that cooperates with described valve body mounting edge linkage structure, the position seals corresponding with described liquid outlet in the central authorities of described valve gap is provided with a hollow mounting pipe regularly, described hollow mounting pipe is passed described valve gap middle part, and the center-aligned of axial and described liquid outlet; On described valve gap, also be provided with suction port; Seal dissepiment, its edge are clamped between described valve body mounting edge and the described valve gap mounting edge hermetically, make to form the elastic packing air cavity between described valve gap and the described seal dissepiment, form fluid chamber between described valve body and the described seal dissepiment; The middle part of described seal dissepiment has mounting hole; A valve core rod, sealing is slidably mounted in the described hollow mounting pipe, and the described mounting hole at described seal dissepiment middle part is passed at its middle part, and fixedlys connected hermetically with described seal dissepiment; A valve plug is fixedly mounted on described valve core rod near on the end of described liquid outlet, and described valve plug is separated with described liquid outlet under normal conditions; It is characterized in that: described liquid outlet links to each other with a pressure-detecting device; Described suction port links to each other with a control air source equipment.After adopting the structure of Pneumatic constant pressure valve of the present utility model, when detecting the variation in pressure of liquid entering hole by the pressure-detecting device that is arranged at liquid outlet, change pressure difference in fluid chamber and the elastic packing air cavity by control air source equipment inflation and venting in the elastic packing air cavity that seal dissepiment and valve gap form, adjust the moving direction of valve core rod, thereby adjust the position of valve plug with respect to liquid outlet, when the detected pressure recovery of pressure-detecting device by liquid outlet arrives initial pressure state, stop inflation or venting, liquid outlet keeps the constant voltage fluid.Adopt Pneumatic constant pressure valve of the present utility model, when the variation in pressure of liquid entering hole, repeated inflation or deflation course can make liquid outlet constant voltage fluid, have realized liquid outlet voltage regulation result preferably; This technological scheme can be adjusted the constant voltage value of liquid outlet as required, satisfies different working environments; This technological scheme is inflated in the elastic packing space by the control air source equipment that is connected with gas port and is exitted and adjust the pressure that reaches liquid outlet in the valve body, has avoided the defective of using spring to adjust.
2. valve core rod of the present utility model comprises center-pole and mounting sleeve, be provided with radially outstanding bar flange at the middle part of center-pole, described mounting sleeve is arranged on described center-pole and closes on the described hollow mounting pipe outer wall partly, clamps hermetically between described mounting sleeve and the described annular flange flange and establishes described seal dissepiment.Described mounting sleeve forms radially outstanding Pipe Flange near the end of described seal dissepiment, described Pipe Flange and described bar flange on the face of described seal dissepiment, respectively form an annular groove, the relevant position on two surfaces of described seal dissepiment be provided with one with the described groove annular boss to upper process of clamping mutually.The utility model has been realized center-pole and mounting sleeve fixing seal, between center-pole and the mounting sleeve again fixing seal seal dissepiment is arranged, therefore realized the interlock between center-pole and seal dissepiment and the mounting sleeve, and they connect and fix each other, fixed effect and good sealing effect, guaranteed the stability of interlock performance, the frequent defective of changing of needs of having avoided adopting the articulated mechanism in the documents to come the unstability of connector element and adopt the spring adjustment to be brought.
3. seal dissepiment of the present utility model is by the elastic sealing strip that is positioned at its both side surface, and the movable plate between two described elastic sealing strips is formed; Be arranged with a collar on the described valve core rod between described bar flange and the described Pipe Flange, the lateral margin of the close described valve core rod of described movable plate snaps in the described collar and with described lower sealing piece and fits.Movable plate is preferably by some fan-shaped round structures that are combined into.Adopt such movable plate structure, when movable plate partly damages, as long as the fanning strip of changing broken parts just can, change and make things convenient for, also reduced the scrappage of product; Movable plate simultaneously of the present utility model adopts metallic material to make, and has not only increased the working life of himself, and has improved the intensity of whole seal dissepiment; In addition, seal dissepiment of the present utility model has upper and lower two-layer diaphragm seal, good sealing effect.
4. center-pole of the present utility model is to the arc structure of medial axis direction symmetry indent, adopt such structure can efficient buffer liquid entering hole place liquid to the impact force of valve core rod, liquid has guaranteed the steady of whole valve working to the generation of the excessive liquid that causes of the impact force of center-pole back into phenomenon when having avoided the body of rod to adopt linear structure.
5. valve plug of the present utility model comprises a leg that links to each other with the end of valve core rod in valve body, forms two preferred four slits on the leg at least, and described slit is narrower near described valve core rod one side, and broadens gradually to opposite side; The profile line in described slit is that the axis of the described relatively valve core rod in two ends is mild, and the steeper horizontal sliding wheel profile of intermediate portion.What this structure had reduced product uses the material amount, has reduced the weight of valve core rod self, thereby has improved the sensitivity of valve core rod motion; Simultaneously, described slit is narrower near described valve core rod one side, and broaden gradually to opposite side, such structure makes in the process of valve plug rising, effective area of contact of valve plug and liquid outlet constantly reduces, therefore when valve plug does not have complete opening, by the height of control valve plug at liquid outlet, can change the area of contact of valve plug and liquid outlet, thereby change the fluid flow of liquid outlet.
6. the cross section of valve body of the present utility model is circular or oval, adopts such valve body structure can avoid the residual of the interior liquid of valve body.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is first kind of embodiment's of the utility model a sectional view vertically
Fig. 2 is second kind of embodiment's of the utility model a sectional view vertically
Fig. 3 is the movable plate schematic representation that first kind of embodiment's of the utility model fan-shaped tongue piece is formed
Reference character is expressed as among the figure: the 1-valve body, and the 2-valve gap, 3-regulates cap, 4-semicircle clip, 5-tongue piece, 6-center-pole, the 7-central washer, 8-tongue piece collar, 9-mounting sleeve, the last rubber ring of 10-, rubber ring under the 11-, 12-O type circle, the 13-control air source equipment, 14-hexagonal socket nut, 15-cap colalr gasket, 16-retaining nut, 17-valve plug, 18-seal ring, the 19-bearing, 20-pressure-detecting device, 21-axle center stop collar, the 22-baffle plate, 23-seal dissepiment sheet, 24-brakes diaphragm, the hollow mounting pipe of 25-, 26-elastic packing air cavity, the 27-fluid chamber.
Embodiment
Referring to Fig. 1, Pneumatic constant pressure valve in the present embodiment comprises: spill valve body 1, and valve body 1 has a mounting edge, and the bottom center place of valve body 1 is provided with a liquid outlet, described liquid outlet links to each other with a pressure-detecting device 20, and the sidewall of described valve body 1 has a liquid entering hole in the horizontal direction; The mounting edge of valve body 1 is the mounting edge sealing and fixing of the valve gap 2 of U-shaped and two semicircle clips 4 with inner groovy and a spill by the cross section, and wherein, two semicircle clips 4 are fixedly connected by hexagonal socket nut 14; Be provided with suction port on described valve gap 2, described suction port links to each other with a control air source equipment 13; The edge of a seal dissepiment in the clamping of sealing and fixing between the mounting edge of described valve body 1 and described valve gap 2, form elastic packing air cavity 26 between sealing barrier film and the described valve gap 2, form fluid chamber 27 between sealing barrier film and the described valve body 1, the middle part of sealing barrier film has a mounting hole; The position seals corresponding with described liquid outlet is provided with a hollow mounting pipe 25 regularly in the central authorities of described valve gap 2, described hollow mounting pipe is passed described valve gap 2 middle parts, and the center-aligned of axial and described liquid outlet, a valve core rod sealing is slidably mounted in the described hollow mounting pipe 25, the described mounting hole at described seal dissepiment middle part is passed at its middle part, and fixedly connected hermetically with described seal dissepiment, its bottom is fixed with a valve plug 17 near on the end of described liquid outlet, and described valve plug 17 is separated with described liquid outlet under normal conditions.
In the present embodiment, described valve core rod comprises center-pole 6 and mounting sleeve 9, and the upper end of center-pole 6 is fixed with mounting sleeve 9 sockets by regulating cap 3, cap colalr gasket 15 and retaining nut 16; The middle part of described center-pole 6 is goed deep in the described valve body 1, and part in going deep into valve body 1 adopts is arc structure to medial axis direction symmetry indent, and such structure can avoid liquid to flow out back residual in valve body; Simultaneously, be provided with radially outstanding bar flange at the middle part of described center-pole 6, described mounting sleeve 9 is arranged on the outer wall that described center-pole 6 closes on described hollow mounting pipe 25 parts, clamps hermetically between described mounting sleeve 9 and the described annular flange flange and establishes described seal dissepiment.Described mounting sleeve 9 forms radially outstanding Pipe Flange near the end of described seal dissepiment, described Pipe Flange and described bar flange on the face of described seal dissepiment, respectively form an annular groove, the relevant position on two surfaces of described seal dissepiment be provided with one with the described groove annular boss to upper process of clamping mutually, thereby realized comprising that the valve core rod of center-pole 6, mounting sleeve 9 and the sealing between the seal dissepiment connect and fix.
Described in the present embodiment seal dissepiment is by the last rubber ring 10 that is positioned at its both side surface, following rubber ring 11 and fan-shaped tongue piece 5 (see figure 3)s between them are formed, described fan-shaped tongue piece is made of metal, described fan-shaped tongue piece 5 is formed circular, its edge card is between tongue piece collar 8, on the described center-pole between the Pipe Flange of the described bar flange of valve core rod and described mounting sleeve, be arranged with a collar, said collar is made of two central washer 7, two central washer 7 with 5 contacted of tongue pieces on be respectively equipped with the flange of an annular, two annular flange flange form draw-in grooves, described tongue piece 5 is snapped in the draw-in groove that described two central washer 7 form and with described rubber ring down near the lateral margin of described center-poles 6 fit.Thereby, realized the fixing and sealing of seal dissepiment inside.
In the present embodiment, the valve plug 17 that is positioned at the valve core rod bottom is actually the bottom that is arranged on center-pole 6, described valve plug 17 comprises a leg that links to each other with the end of described center-pole 6 in described valve body 1, form four equally distributed slits on the described leg, described slit is narrower in close described center-pole 6 one sides, and broadens gradually to opposite side.The profile line in described slit is that the axis of the described relatively valve core rod in two ends is mild, and the steeper horizontal sliding wheel profile of intermediate portion.
The working principle of present embodiment is: when whole Pneumatic constant pressure valve is in off working state, have certain gas pressure in the elastic packing air cavity 26 that valve gap 2, last rubber ring 10, tongue piece 5, following rubber ring 11 and valve core rod 6 constitute, valve plug 17 separates with liquid outlet.During work, detect the initial pressure P1 of liquid outlet by the pressure-detecting device 20 that is arranged on liquid outlet, if this moment liquid entering hole constant pressure, valve plug 17 is with respect to the invariant position of liquid outlet, liquid outlet is with the constant voltage fluid.When the pressure that detects liquid entering hole by pressure-detecting device 20 increases suddenly, fluid flows into from liquid entering hole, pressure in the fluid chamber 27 increases, act on down on the rubber ring 11 the power that makes progress increase, following rubber ring 11, tongue piece 5 and last rubber ring 10 can move upward, drive comprises on the valve core rod of center-pole 6 and mounting sleeve 9 and moving, thereby valve plug 17 can move upward, for the constant pressure that keeps exporting, need open control air source equipment 20 inflates in elastic packing air cavity 26, at this moment, force value by pressure-detecting device 20 observation liquid outlets, when the force value that shows on the pressure gauge equals P1, stop inflation, liquid outlet this moment constant voltage fluid again; When the pressure that detects liquid entering hole by pressure-detecting device 20 reduces, valve plug 17 can move downward, for the constant pressure that keeps exporting, need by the outside exhaust of gas port, the pressure in the elastic packing air cavity 26 is reduced, at this moment, observe the force value of liquid outlet by pressure-detecting device 20, when the force value that shows on the pressure-detecting device 20 is reduced to P1, close control air source equipment 13, stop venting, guaranteed the constant pressure of liquid outlet.When the pressure of liquid outlet repeated inflation process during greater than P1, when the pressure of liquid outlet during, repeat deflation course again less than P1, so circulation will make liquid outlet fluid under pressure constant state, realize voltage regulation result.
Embodiment 2
Referring to Fig. 2.Pneumatic constant pressure valve of the present utility model comprises valve body 1, is spill, and the cross section of said valve body 1 is circular, also can be set to ellipse.Described valve body 1 has a valve body mounting edge, and centre is provided with liquid outlet, and the next door of described liquid outlet is provided with liquid entering hole, and liquid entering hole herein is an arc; Valve gap 2, be spill, have valve gap 2 mounting edge that cooperate with described valve body 1 mounting edge linkage structure, the position seals corresponding with described liquid outlet is provided with a hollow mounting pipe 25 regularly in the central authorities of described valve gap 2, described hollow mounting pipe 25 is passed described valve gap 2 middle parts, and the center-aligned of axial and described liquid outlet; On described valve gap 2, also be provided with the control air source equipment 13 that is connected with suction port, seal dissepiment, its edge is clamped between described valve body mounting edge and the described valve gap mounting edge hermetically, make to form elastic packing air cavity 26 between described valve gap 2 and the described seal dissepiment, form fluid chamber 27 between described valve body 1 and the described seal dissepiment; The middle part of described seal dissepiment has mounting hole; A valve core rod sealing is slidably mounted in the described hollow mounting pipe 25, the described mounting hole at described seal dissepiment middle part is passed at its middle part, and fixedly connected hermetically with described seal dissepiment 3, at this, described valve core rod comprises center-pole 6 and mounting sleeve 9, for the sealing that guarantees to connect between center-pole 6 and the mounting sleeve 9, be provided with seal ring 18 between them, be provided with radially outstanding annular flange flange at the middle part of described center-pole 6, described mounting sleeve 9 is arranged on the outer wall that described center-pole 6 closes on described hollow mounting pipe 25 parts, clamps between described mounting sleeve 9 and the described annular flange flange described seal dissepiment is set.At this, described seal dissepiment comprises seal dissepiment sheet 23 and braking diaphragm 24, and seal dissepiment sheet 23 materials herein are EPDM, and promptly ethylene propylene diene rubber is the terpolymer of ethene, propylene and non-conjugated diene hydrocarbon; Actuation diaphragm sheet 24 is herein made for rubber and PTFE, and in order to improve its intensity, intermediate portion is a metallic material.Described braking diaphragm 24 is arranged on the described annular flange flange, described seal dissepiment sheet 23 is fitted with described actuation diaphragm sheet 24, the upper surface of described seal dissepiment sheet 23 is provided with boss, and the bottom of described mounting sleeve 9 is provided with groove, and described boss and groove connect and fix mutually.A valve plug 17 is fixedly mounted on described valve core rod near on the end of described liquid outlet.
In the present embodiment, described valve plug 17 is that to be connected the end bigger with described valve core rod, and towards the long-pending diminishing shape of the other end circular cross-section.In addition, to the impact force of described seal dissepiment sheet 23 and braking diaphragm 24, be provided with baffle plate 22 between described seal dissepiment and the described suction port when inflating in order to reduce suction port; For the better effects if that described mounting sleeve 9 and described center-pole 6 are fixed, the top of described mounting sleeve 9 is provided with valve core rod stop collar 21, and described valve core rod stop collar 21 is fixedlyed connected with described center-pole 9 by bolt.Have again, between the inwall of the outer wall of described mounting sleeve 9 and described hollow mounting pipe 25, be provided with bearing 20, between the inwall of the outer wall of described valve core rod stop collar 21 and described hollow mounting pipe 25, also be provided with bearing 19, be convenient to valve core rod and move up and down.
The described constant pressure valve of this example, its working principle is as follows: when whole Pneumatic constant pressure valve is in off working state, have certain gas pressure in the elastic packing air cavity 26 that valve gap 2, seal dissepiment sheet 23, braking diaphragm 24 and valve core rod constitute, valve plug 17 separates with liquid outlet.During work, detect the initial pressure P1 of liquid outlet by the pressure-detecting device 20 that is arranged on liquid outlet, if this moment liquid entering hole constant pressure, valve plug 17 is with respect to the invariant position of liquid outlet, liquid outlet is with the constant voltage fluid.When the pressure that detects liquid entering hole by pressure-detecting device 20 increases suddenly, fluid flows into from liquid entering hole, pressure in the fluid chamber 27 increases, act on braking on the diaphragm 24 the power that makes progress increase, drive comprises on the valve core rod of center-pole 6 and mounting sleeve 9 and moving, thereby valve plug 17 can move upward, for the constant pressure that keeps exporting, need open control air source equipment 20 inflates in elastic packing air cavity 26, at this moment, by the force value of pressure-detecting device 20 observation liquid outlets, when the force value that shows on the pressure gauge equals P1, stop inflation, liquid outlet this moment constant voltage fluid again; When the pressure that detects liquid entering hole by pressure-detecting device 20 reduces, valve plug 17 can move downward, for the constant pressure that keeps exporting, need by the outside exhaust of gas port, the pressure in the elastic packing air cavity 26 is reduced, at this moment, observe the force value of liquid outlet by pressure-detecting device 20, when the force value that shows on the pressure-detecting device 20 is reduced to P1, close control air source equipment 13, stop venting, guaranteed the constant pressure of liquid outlet.When the pressure of liquid outlet repeated inflation process during greater than P1, when the pressure of liquid outlet during, repeat deflation course again less than P1, so circulation will make liquid outlet fluid under pressure constant state, realize voltage regulation result.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all mode of executions.And conspicuous variation of being extended out thus or change still are among the protection domain of the utility model creation.
Claims (10)
1. a Pneumatic constant pressure valve comprises
Valve body is spill, has a valve body mounting edge, and centre is provided with liquid outlet, and the next door of described liquid outlet is provided with liquid entering hole;
Valve gap, be spill, has the valve gap mounting edge that cooperates with described valve body mounting edge linkage structure, the position seals corresponding with described liquid outlet in the central authorities of described valve gap is provided with a hollow mounting pipe regularly, described hollow mounting pipe is passed described valve gap middle part, and the center-aligned of axial and described liquid outlet; On described valve gap, also be provided with suction port;
Seal dissepiment, its edge are clamped between described valve body mounting edge and the described valve gap mounting edge hermetically, make to form the elastic packing air cavity between described valve gap and the described seal dissepiment, form fluid chamber between described valve body and the described seal dissepiment; The middle part of described seal dissepiment has mounting hole;
A valve core rod, sealing is slidably mounted in the described hollow mounting pipe, and the described mounting hole at described seal dissepiment middle part is passed at its middle part, and fixedlys connected hermetically with described seal dissepiment;
A valve plug is fixedly mounted on described valve core rod near on the end of described liquid outlet, and described valve plug is separated with described liquid outlet under normal conditions;
It is characterized in that:
Described liquid outlet links to each other with a pressure-detecting device; Described suction port links to each other with a control air source equipment.
2. Pneumatic constant pressure valve according to claim 1, it is characterized in that: described valve core rod comprises center-pole and mounting sleeve, be provided with radially outstanding bar flange at the middle part of described center-pole, described mounting sleeve is arranged on described center-pole and closes on the described hollow mounting pipe outer wall partly, clamps described seal dissepiment hermetically between described mounting sleeve and the described annular flange flange.
3. Pneumatic constant pressure valve according to claim 2, it is characterized in that: described mounting sleeve forms radially outstanding Pipe Flange near the end of described seal dissepiment, described Pipe Flange and described bar flange on the face of described seal dissepiment, respectively form an annular groove, the relevant position on two surfaces of described seal dissepiment be provided with one with the described groove annular boss to upper process of clamping mutually.
4. according to claim 1,2 or 3 described Pneumatic constant pressure valves, it is characterized in that: described seal dissepiment is by the elastic sealing strip that is positioned at its both side surface, and the movable plate between two described elastic sealing strips is formed; Be arranged with a collar on the described valve core rod between described bar flange and the described Pipe Flange, the lateral margin of the close described valve core rod of described movable plate snaps in the described collar and with described lower sealing piece and fits.
5. Pneumatic constant pressure valve according to claim 4 is characterized in that: the circle that described movable plate is made up of a plurality of fanning strips, described fanning strip is made of metal.
6. according to claim 1,2 or 3 described Pneumatic constant pressure valves, it is characterized in that: the cross section of described valve body is circular or oval.
7. according to any described Pneumatic constant pressure valve among the claim 1-3, it is characterized in that: be positioned at the arc structure of the described valve core rod employing of described valve body part to medial axis direction symmetry indent.
8. according to any described Pneumatic constant pressure valve among the claim 1-3, it is characterized in that: described valve plug comprises a leg that links to each other with the end of described valve core rod in described valve body, at least form two slits on the described leg, described slit is narrower near described valve core rod one side, and broadens gradually to opposite side.
9. Pneumatic constant pressure valve according to claim 8 is characterized in that: the profile line in described slit is that the axis of the described relatively valve core rod in two ends is mild, and the steeper horizontal sliding wheel profile of intermediate portion.
10. Pneumatic constant pressure valve according to claim 8 is characterized in that: described slit is four, and evenly distributes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205279738U CN201787148U (en) | 2010-09-14 | 2010-09-14 | Pneumatic constant pressure valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205279738U CN201787148U (en) | 2010-09-14 | 2010-09-14 | Pneumatic constant pressure valve |
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| CN201787148U true CN201787148U (en) | 2011-04-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929572A (en) * | 2010-09-14 | 2010-12-29 | 上海远安流体设备有限公司 | Pneumatic constant pressure valve |
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2010
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929572A (en) * | 2010-09-14 | 2010-12-29 | 上海远安流体设备有限公司 | Pneumatic constant pressure valve |
| CN101929572B (en) * | 2010-09-14 | 2013-01-30 | 上海远安流体设备科技有限公司 | Pneumatic constant pressure valve |
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