CN101929572B - Pneumatic constant pressure valve - Google Patents
Pneumatic constant pressure valve Download PDFInfo
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- CN101929572B CN101929572B CN 201010280756 CN201010280756A CN101929572B CN 101929572 B CN101929572 B CN 101929572B CN 201010280756 CN201010280756 CN 201010280756 CN 201010280756 A CN201010280756 A CN 201010280756A CN 101929572 B CN101929572 B CN 101929572B
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Abstract
The invention relates to a pneumatic constant pressure valve which comprises a valve body and a valve cap, wherein the valve cap is hermetically matched with the valve body; a sealing diaphragm is arranged between the valve body and the valve cap, the outer edge of the sealing diaphragm is clamped between the valve body and the valve cap, the rest part of the sealing diaphragm can move up and down in the working state, and a through hole is arranged in the middle of the sealing diaphragm; an air inlet and an air inlet standard part 1 for sealing the air inlet are arranged on the valve cap; a through hole is arranged in the middle of the valve cap; a liquid inlet on the side wall and a liquid outlet on the bottom are arranged on the valve body; a valve spool rod hermetically passes through the through hole of the valve cap and the through hole of the sealing diaphragm and extends into the valve body; a valve plug hermetically matched with the liquid outlet is arranged at the lower end of the valve spool rod; and when the sealing diaphragm moves upwards, the valve spool rod is driven by a link mechanism to move upwards to separate the valve plug from the liquid outlet. The pneumatic constant pressure valve of the invention adapts to the requirements of large scale production, can realize opening of the valve and control of the liquid flow and liquid pressure at the outlet under the working state of the valve without frequently replacing components, simultaneously has good pressure stabilizing effect, and can adapt to different liquid environments.
Description
Technical field
The present invention 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 widely used in the manufacturing process of the 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 upper liquid sealing, between pressure adjusting nut and connecting rod Compress Spring is installed, and the lower hinge of connecting rod has the braking tongue, the afterbody of braking tongue is connected with mobile shelves, mobile shelves front end is installed with the sealing plug, and 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 Compress 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 Compress 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 so that keeps the pressure of setting in the 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, liquid outlet pressure decreased then, 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 elongation and the compression of spring, thereby adjust the position relationship 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.
Summary of the invention
For this reason, technical problem to be solved by this invention 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 that the present invention will solve is: take in the prior art regulate with spring and the life-span of spring limited, need the technological deficiency of frequent, thereby a kind of pressure maintaining valve easy and simple to handle that does not need the frequent parts be provided.
Thereby a kind of constant good pressure maintaining valve of voltage regulation result of pressure maintenance that does not need the frequent parts and can make liquid outlet is proposed.
Pneumatic constant pressure valve of the present invention 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 arranges 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 is fixedly connected with 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 bar 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 is provided with an annular boss to upper process with the clamping of described groove phase.
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 forms; Described valve core rod between described bar flange and described Pipe Flange is arranged with a collar, and the lateral margin of the close described valve core rod of described movable plate snaps in the described collar and with lower sealing piece fits.
The circle that described movable plate is comprised of a plurality of fanning strips, described fanning strip is made of metal.
The cross section of described valve body is circular or oval.
The described valve core rod that is positioned at described valve body part adopts to the arc structure of the symmetrical indent of medial axis direction.
Described valve plug comprises a leg that links to each other with the end of described valve core rod in described valve body, forms at least two slits on the described leg, 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 relatively described 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 invention has the following advantages:
1. Pneumatic constant pressure valve of the present invention 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 arranges 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 is fixedly connected with 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 invention, when detecting the pressure variation of liquid entering hole by the pressure-detecting device that is arranged at liquid outlet, inflation and venting change the pressure difference in fluid chamber and the elastic packing air cavity in the elastic packing air cavity that forms to seal dissepiment and valve gap by control air source equipment, adjust the moving direction of valve core rod, thereby adjust valve plug with respect to the position of liquid outlet, until the pressure that the pressure-detecting device by liquid outlet detects is when returning to initial pressure state, stop inflation or venting, liquid outlet keeps the constant voltage fluid.Adopt Pneumatic constant pressure valve of the present invention, when the pressure of liquid entering hole changed, repeated inflation or deflation course can make liquid outlet constant voltage fluid, have realized preferably voltage regulation result of liquid outlet; This technological scheme can be adjusted the constant voltage value of liquid outlet as required, satisfies different working environments; This technological scheme has been avoided the defective of adjusting with spring by the inflation and venting is adjusted in the valve body and the pressure of liquid outlet in the elastic packing space of the control air source equipment that is connected with gas port.
2. valve core rod of the present invention 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 described seal dissepiment between described mounting sleeve and the described bar flange.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 is provided with an annular boss to upper process with the clamping of described groove phase.The present invention has 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, guarantee the stability of interlock performance, avoided adopting the articulated mechanism in the documents to come the unstability of connector element and the defective that needs frequent that adopts the spring adjustment to bring.
3. seal dissepiment of the present invention is by the elastic sealing strip that is positioned at its both side surface, and the movable plate between two described elastic sealing strips forms; Described valve core rod between described bar flange and described Pipe Flange is arranged with a collar, and 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 invention 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 invention has upper and lower two-layer diaphragm seal, good sealing effect.
4. center-pole of the present invention is to the arc structure of the symmetrical indent of medial axis direction, adopt such structure can effectively cushion 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 invention comprises a leg that links to each other with the end of valve core rod in valve body, forms at least two preferred four slits on the leg, 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 relatively described valve core rod in two ends is mild, and the steeper horizontal sliding wheel profile of intermediate portion.This Structure Decreasing product use the material amount, reduced the weight of valve core rod self, thereby 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 is not opened fully, 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 invention is circular or oval, adopts such valve body structure can avoid the residual of the interior liquid of valve body.
Description of drawings
For content of the present invention is more likely to be clearly understood, the below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the first embodiment's of the present invention sectional view vertically
Fig. 2 is the second embodiment's of the present invention sectional view vertically
Fig. 3 is the movable plate schematic diagram that the first embodiment's of the present invention fan-shaped tongue piece forms
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 upper 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 that the mounting edge sealing of the valve gap 2 of U-shaped and two semicircle clips 4 with inner groovy and a spill is fixed by the cross section, and wherein, two semicircle clips 4 are fixedly connected with by hexagonal socket nut 14; Be provided with suction port at 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 fixing clamping of sealing 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 arranges 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 be fixedly connected with 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 by socket with mounting sleeve 9 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 the symmetrical indent of medial axis direction, residual after such structure can avoid liquid to flow out 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 bar 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 is provided with an annular boss to upper process with the clamping of described groove phase, thereby has 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 seal dissepiment is by the upper rubber ring 10 that is positioned at its both side surface in the present embodiment, lower rubber ring 11 and the fan-shaped tongue piece 5 (seeing Fig. 3) between them form, described fan-shaped tongue piece is made of metal, described fan-shaped tongue piece 5 forms circular, its edge card is between tongue piece collar 8, described center-pole between the Pipe Flange of the described bar flange of valve core rod and described mounting sleeve is arranged with a collar, said collar is made of two central washer 7, two central washer 7 with 5 contacted flanges that are respectively equipped with an annular of tongue piece, the flange of two described annulars forms draw-in groove, described tongue piece 5 is snapped in the draw-in groove that described two central washer 7 form and with described lower rubber ring 11 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 relatively described valve core rod in two ends is mild, and the steeper horizontal sliding wheel profile of intermediate portion.
The working principle of the 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, upper rubber ring 10, tongue piece 5, lower rubber ring 11 and valve core rod 6 consist of, 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 the lower rubber ring 11 the power that makes progress increase, lower rubber ring 11, tongue piece 5 and upper 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 to open control air source equipment 20 to the 26 interior inflations of elastic packing air cavity, 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 again less than P1, repeat deflation course, 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 invention 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 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 arranges 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 be fixedly connected with 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 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 between described mounting sleeve 9 and the described bar 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 namely 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 metallic material.Described braking diaphragm 24 is arranged on the described bar 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 larger 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 fixedly 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 consist of, 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 to open control air source equipment 20 to the 26 interior inflations of elastic packing air cavity, 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 again less than P1, repeat deflation course, so circulation will make liquid outlet fluid under pressure constant state, realize voltage regulation result.
Obviously, above-described embodiment only is for example clearly is described, and is not the restriction 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 all mode of executions exhaustive.And the apparent variation of being extended out thus or change still are among the protection domain of the invention.
Claims (8)
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 arranges 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 is fixedly connected with 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 described seal dissepiment between described mounting sleeve and the described bar flange; 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 is provided with an annular boss to upper process with the clamping of described groove phase.
2. Pneumatic constant pressure valve according to claim 1 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 forms; Described valve core rod between described bar flange and described Pipe Flange is arranged with a collar, and the lateral margin of the close described valve core rod of described movable plate snaps in the described collar and with lower sealing piece fits.
3. Pneumatic constant pressure valve according to claim 2, it is characterized in that: the circle that described movable plate is comprised of a plurality of fanning strips, described fanning strip is made of metal.
4. Pneumatic constant pressure valve according to claim 1 is characterized in that: the cross section of described valve body is circular or oval.
5. Pneumatic constant pressure valve according to claim 1 is characterized in that: be positioned at the described valve core rod employing of described valve body part to the arc structure of the symmetrical indent of medial axis direction.
6. Pneumatic constant pressure valve according to claim 1, 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.
7. Pneumatic constant pressure valve according to claim 6, it is characterized in that: the profile line in described slit is that the axis of the relatively described valve core rod in two ends is mild, and the steeper horizontal sliding wheel profile of intermediate portion.
8. Pneumatic constant pressure valve according to claim 6, it is characterized in that: described slit is four, and evenly distributes.
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| CN 201010280756 CN101929572B (en) | 2010-09-14 | 2010-09-14 | Pneumatic constant pressure valve |
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| CN 201010280756 CN101929572B (en) | 2010-09-14 | 2010-09-14 | Pneumatic constant pressure valve |
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| CN101929572A CN101929572A (en) | 2010-12-29 |
| CN101929572B true CN101929572B (en) | 2013-01-30 |
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| CN104712768B (en) * | 2013-12-13 | 2018-09-14 | 贵州中烟工业有限责任公司 | Liquid control valve |
| CN104373647A (en) * | 2014-11-29 | 2015-02-25 | 中国船舶重工集团公司第七�三研究所 | Lubricating oil low-pressure protecting device |
| CN105605243A (en) * | 2016-04-01 | 2016-05-25 | 成都科盛石油科技有限公司 | Pressure-regulation pilot mechanism used in pneumatic system |
| CN107883040A (en) * | 2017-12-22 | 2018-04-06 | 上海南华换热器制造有限公司 | A kind of Pneumatic constant pressure valve |
| CN108548091B (en) * | 2018-04-18 | 2020-06-02 | 衢州杭氧特种气体有限公司 | Krypton and xenon filling process and production line thereof |
| CN117570230B (en) * | 2024-01-19 | 2024-03-19 | 四川中油乐仪能源装备制造股份有限公司 | Axial flow type check valve |
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| US6929026B1 (en) * | 2003-03-28 | 2005-08-16 | Joseph Wilfred Arlinghaus, Jr. | Sanitary liquid pressure regulator |
| DE202005005675U1 (en) * | 2005-04-09 | 2005-08-11 | Apv Rosista Gmbh | Membrane valve for maintaining constant pressure in processes in food and pharmaceutical industries has stationary support disk for membrane which also acts as radial guide for valve stem |
| CN101608692B (en) * | 2009-07-24 | 2011-01-26 | 长安大学 | Manual, electrical and hydraulic three-function Y-shaped constant-pressure flow regulating valve with multiple spray holes |
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