CN203067919U - Reducing valve - Google Patents
Reducing valve Download PDFInfo
- Publication number
- CN203067919U CN203067919U CN2012205477422U CN201220547742U CN203067919U CN 203067919 U CN203067919 U CN 203067919U CN 2012205477422 U CN2012205477422 U CN 2012205477422U CN 201220547742 U CN201220547742 U CN 201220547742U CN 203067919 U CN203067919 U CN 203067919U
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- Prior art keywords
- valve
- seat
- driving spring
- valve rod
- diaphragm
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a reducing valve. According to the reducing valve, a membrane is fixed on a driving spring base in a sealed mode, a central through hole penetrating through the upper surface and the lower surface of the membrane is formed in the membrane, and the lower end of the driving spring base is fixedly connected with a valve rod ejecting base which protrudes out of the central through hole and is used for ejecting a valve rod. When the membrane is pushed upwards or downwards in the process of using, ejecting force on a driving spring and the valve rod can be transmitted between the driving spring and the valve rod through the driving spring base and the valve rod ejecting base, the driving spring base and the valve rod ejecting base cannot directly push the middle position of the valve rod, the membrane is gathered towards the middle portion through the sealing and fixed connection between the driving spring seat and the membrane, bending deformation of the membrane in the process of using is changed to tensile deformation, the purpose of buffering valve rod movements can be achieved by utilizing malleability of the membrane, the speed of fatigue damage of the membrane is lowered, and the service life of the membrane is prolonged.
Description
Technical field
The utility model relates to the pressure control valve technical field, relates in particular to a kind of reduction valve.
Background technique
Application number is that 20110027048.8 Chinese utility model patent discloses a kind of reduction valve, this reduction valve comprises valve body, valve gap, diaphragm, the driving spring seat, the valve rod wedge, valve rod assembly, driving spring and drive screw, valve gap is fastened on the valve body by bolt, diaphragm is between valve gap and the lid, drive screw revolves and is located on the valve gap, and from the top down successively by driving spring and driving spring seat roof pressure roof pressure diaphragm from the top down, offer the dashpot that is in the diaphragm below on the valve body, and offer the throttling passage that is between inlet hole and the air outlet hole at the bottom land of dashpot, throttling passage respectively with valve body on the inlet hole offered, air outlet hole and dashpot are communicated with, offer the tap hole that is communicated with dashpot on the sidewall of the air outlet hole on the valve body, also offer on the valve body and advancing that inlet hole and air outlet hole are communicated with respectively, give vent to anger and detect mouth, in this throttling passage, valve rod is installed, valve rod comes the switch of the inlet hole of control valve body by its bottom crossette, cooperate to guarantee when inlet hole is opened by the slipper seal between the perisporium of its top and throttling passage, inlet hole can be communicated with air outlet hole by throttling passage, and the bottom of valve rod is provided with the upwards return spring of jack-up valve rod, the top is by valve rod wedge pushing tow diaphragm, the edge of diaphragm is clamped on the bolted junction of valve gap and valve body, when needs are opened reduction valve, by screwing the driving bolt, make valve rod at driving spring, the driving spring seat, the jacking force that overcomes return spring under the effect of diaphragm and valve rod wedge moves down, and then makes inlet hole open; When needs are closed reduction valve, by unscrewing drive screw, make valve rod under the thrusting action of return spring, by the valve rod wedge jack-up diaphragm that makes progress, move up at the pressure that makes the driving spring seat overcome driving spring by diaphragm, this moment, the crossette of valve rod can be closed the inlet hole on the valve body again.But because diaphragm is the flake structure that is made of the modified rubber diaphragm, and the edge of valve rod is clamped on the junction of valve body and valve gap, therefore in use driving spring seat and valve rod wedge can make the fatigue damage of diaphragm aggravate to the constantly direct roof pressure in the middle part of the diaphragm, thereby reduce the working life of diaphragm, shorten the repair cycle of reduction valve, so that shorten the working life of reduction valve, reduces the operational safety of reduction valve.
The model utility content
The purpose of this utility model provides a kind of reduction valve, is intended to solve the serious problem of diaphragm fatigue damage of reduction valve in the prior art.
In order to realize above purpose, the technological scheme that the utility model adopts is:
The technological scheme of reduction valve of the present utility model is as follows:
Reduction valve, comprise that edge clamping is located at diaphragm between valve body and the valve gap, is in the driving spring seat of diaphragm top and is in the valve rod of diaphragm below, described diaphragm seal is fixed on the driving spring seat, and offering the central through bore that runs through its upper and lower surface at diaphragm, the lower end of driving spring seat is fixed with the valve rod roof pressure seat that is used for the roof pressure valve rod that protrudes from described central through bore.
The hole of described central through bore is along being folded between valve rod roof pressure seat and the driving spring seat.
Offer the pilot hole that is communicated with described central through bore on the described driving spring seat, convex with the directional post that stretches out from the upside of described pilot hole on the described valve rod roof pressure seat, the locking nut that is threaded on the periphery of described valve rod roof pressure seat by the extension of described directional post is fixed on the driving spring seat.
The middle part of described diaphragm has the annular fold of projection up or down that is in around the described driving spring seat.
The end of described valve body and/or valve gap is provided with the cushion pad at the marginal position place that is in diaphragm.
Be equiped with the Decompression valves that is on the detection mouth that is communicated with air outlet hole on the described valve body, the import of described Decompression valves is communicated with described detection mouth.
Described Decompression valves comprises that coaxial threaded is connected the described tubular valve seat that detects on the mouth, the endoporus of described tubular valve seat is shoulder hole, the aperture opening of described tubular valve seat is communicated with described detection mouth, be sealed with bonnet on the big end opening of described tubular valve seat, but and in the macropore section of tubular valve seat vertically guiding be equipped with the occluding body of interior end opening of shutoff aperture section, also be equiped with in the macropore section of described tubular valve seat for promoting the Returnning spring that occluding body moves to small end, offer on the hole wall of the macropore section of described tubular valve seat for when the interior end opening of aperture section is opened, the relief passage that is communicated with aperture section by the macropore section.
The utility model is fixed on diaphragm seal on the driving spring seat, and offer the central through bore that runs through its upper and lower surface at diaphragm, the lower end of driving spring seat is fixed with the valve rod roof pressure seat that is used for the roof pressure valve rod that protrudes from described central through bore, in use when diaphragm during by pushing tow up or down, roof pressure power on driving spring and the valve rod can be transmitted between driving spring and valve rod by driving spring seat and valve rod roof pressure seat, and driving spring seat and valve rod roof pressure seat be the direct neutral position of pushing tow valve rod not, but be connected by the sealing between driving spring seat and the diaphragm diaphragm is gathered to the middle part, thereby diaphragm bending is in use changed to tensile buckling, and then the ductility of having utilized diaphragm self reaches knowing the real situation of buffering valve rod action, slow down the speed of diaphragm fatigue damage, prolonged the working life of diaphragm.
Description of drawings
Fig. 1 is embodiment's of the present utility model structural representation;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the partial enlarged drawing at A place among Fig. 1;
Fig. 4 is the partial enlarged drawing at B place among Fig. 1;
Fig. 5 is the partial enlarged drawing at C place among Fig. 2.
Embodiment
The embodiment of reduction valve of the present utility model: as shown in Figures 1 to 4, this reduction valve comprises valve body 1, valve gap 2, diaphragm 3, driving spring seat 4, valve rod roof pressure seat 5, valve rod assembly 6, driving spring 7, drive screw 8, Decompression valves 9.The mounting type of valve rod assembly 6 in valve body 1 is same as the prior art in the utility model.Valve gap 2 screws on valve body 1, and the edge clamping of diaphragm 3 is located at the junction of valve gap 2 and valve body 1, and is provided with the cushion pad 10 at the marginal position place that is in diaphragm 3 in valve body 1 end.Driving spring seat 4 and valve rod roof pressure seat 5 are sticked respectively on the upper and lower surface at diaphragm 3 middle parts, and the middle part of diaphragm 3 has the annular fold 3-1 that raises up that is in around the described driving spring seat 4.The middle part of diaphragm 3 offers the central through bore that connects its upper and lower surface, and the hole of described central through bore is along being folded between driving spring seat 4 and the valve rod roof pressure seat 5, offer the pilot hole that is communicated with described central through bore on the driving spring seat 4, convex with the directional post 5-1 that from described central through bore, passes and stretch in the described pilot hole on the valve rod roof pressure seat 5.Pilot hole is through hole, and directional post 5-1 stretches in the described pilot hole, and stretches out from the upper end of pilot hole, offers annular groove on the periphery of extension, and annular groove extends along the vertical direction.Be equiped with on the driving spring seat 4 and be set in the locking nut 11 of described directional post 5-1 on the periphery of the extension of described pilot hole, locking nut 11 is connected with the directional post coaxial threaded, makes valve rod roof pressure seat 5 drive on driving spring seat 4.Offer the annular mounting groove at the lower ending opening place that is in described pilot hole on the driving spring seat 4, be embedded with ring washer 12 in the described mounting groove, described ring washer 12 is set on the periphery of described directional post 5-1.
Be equiped with the Decompression valves 9 that is on the detection mouth 1-3 that is communicated with air outlet hole 1-2 on the described valve body 1, the import of Decompression valves 9 is communicated with a described detection mouthful 1-3.Decompression valves 9 comprises that coaxial threaded is connected the described tubular valve seat 9-1 that detects on mouthful 1-3, the endoporus of tubular valve seat 9-1 is shoulder hole, the aperture opening of described tubular valve seat 9-1 is communicated with a described detection mouthful 1-3, be sealed with bonnet 9-2 on the big end opening of tubular valve seat 9-1, but and in the macropore section of tubular valve seat 9-1 vertically guiding be equipped with the occluding body 9-3 of interior end opening of shutoff aperture section, also be equiped with in the macropore section of tubular valve seat 9-1 for promoting the Returnning spring 9-4 that occluding body 9-3 moves to small end, offer on the hole wall of the macropore section of tubular valve seat 9-1 for when the interior end opening of aperture section is opened, the relief passage 9-5 that is communicated with aperture section by the macropore section.
It is decompression and voltage stabilizing that the utility model mainly acts on.The principle of decompression is throttling, when pressurized gas flow into from inlet hole 1-1, after the restriction of valve rod and valve body 1 formation, has lost a part of pressure energy, and the pressure of gas reduces.In the process of throttling, to produce bump, friction and eddy current with the sagging part of the inlet hole 1-1 hole wall of valve body 1 between gas molecule, gas is in non-equilibrium state, it is an irreversible process, the degree that pressure reduces after the throttling depends on the aperture between valve rod and the inlet hole 1-1, when rate of discharge one timing, aperture is more little, and then pressure reduces more many; The principle of voltage stabilizing is equilibrium of forces, be that air outlet hole 1-2 pressure acts on the diaphragm 3, balance each other with a part of power of driving spring 7, add return spring to the active force of valve rod, inlet hole 1-1 pressure is to the active force of valve rod, thereby make the valve rod aperture at an equinoctial point, play down voltage stabilizing.
Sealing configuration in the utility model between valve rod and valve body 1, when the reduction valve unloading condition, produce and leak, turgor pressure can appear in air outlet hole 1-2, even straight-through phenomenon, directly influence the normal working performance of reduction valve, therefore, for guaranteeing the sealing of valve rod and valve body 1, because the product working pressure is low, valve rod 6-1 crossette place adopts resistant to elevated temperatures fluoroether rubber sulfuration, is easy to sealing, and valve body 1 sealing place is simultaneously processed at the accurate digital control lathe with moulding R cutter, improve the inlet hole 1-1 place of valve body 1 and the roughness at valve rod 6-1 binding site place, so just realized the sealing reliability of valve rod 6-1 and valve body 1.
Under the bigger occasion of temperature variation, work in the utility model, and change frequency is higher, therefore just particularly important in the selection of diaphragm 3 materials, can only select for use at the not obvious or unconverted material of the material temperature performance variation that requires.At this usage requirement, diaphragm 3 materials are decided to be QBe-2, and thickness is 0.08mm.Thinner thickness because of diaphragm 3; and degree of finish requires also higher Ra0.8; when assembling test and work, subject to destroy; therefore then attach most importance to for the protection of diaphragm 3; its stressed can not directly contact for valve rod 6-1; and this assembly is carried out air tightness test can assemble after qualified, adopt ring washer 12(material FM-2D with the sealing of valve body 1 simultaneously), to guarantee not destroy diaphragm 3 when assembling, the dismounting.
Decompression valves 9 is a kind of automatic valves in the utility model; when valve rod 6-1 and valve body 1 sealing place generation leakage; pressure instability can appear in air outlet hole 1-2 during reduction valve work, turgor pressure occurs, even straight-through phenomenon; at this moment Decompression valves 9 is just as a kind of overpressure protector; automatically open, discharge unnecessary gas, after pressure recovers normally; valve row is again closed, and prevents that medium from continuing discharging.Therefore do not change after cracking pressure is debugged for guaranteeing that unloading is sent out, be locked on the valve body 1 with the coaxial threaded ways of connecting, and add lead sealing, prevent that tubular valve seat 9-1 is loosening.
In the above-described embodiments, diaphragm by the alignment of driving spring seat and valve rod roof pressure seat clamping action and the seal action sealing and fixing of annular gasket on the driving spring seat, in other embodiments, modes such as diaphragm also can connect by screw, bonding, riveted joint are fixed on the driving spring seat, corresponding, the hole of the central through bore on the diaphragm is neighbouring along the edge, lower end that is in the driving spring seat, the peripheral position place of valve rod roof pressure seat.
Claims (6)
1. reduction valve, comprise that edge clamping is located at diaphragm between valve body and the valve gap, is in the driving spring seat of diaphragm top and is in the valve rod of diaphragm below, it is characterized in that: described diaphragm seal is fixed on the driving spring seat, and offer the central through bore that runs through its upper and lower surface at diaphragm, the lower end of driving spring seat is fixed with the valve rod roof pressure seat that is used for the roof pressure valve rod that protrudes from described central through bore, and the middle part of described diaphragm has the annular fold of projection up or down that is in around the described driving spring seat.
2. reduction valve according to claim 1 is characterized in that: the hole of described central through bore is along being folded between valve rod roof pressure seat and the driving spring seat.
3. reduction valve according to claim 1, it is characterized in that: offer the pilot hole that is communicated with described central through bore on the described driving spring seat, convex with the directional post that stretches out from the upside of described pilot hole on the described valve rod roof pressure seat, the locking nut that is threaded on the periphery of described valve rod roof pressure seat by the extension of described directional post is fixed on the driving spring seat.
4. according to claim 1 or 2 or 3 described reduction valve, it is characterized in that: the end of described valve body and/or valve gap is provided with the cushion pad at the marginal position place that is in diaphragm.
5. according to claim 1 or 2 or 3 described reduction valve, it is characterized in that: be equiped with the Decompression valves that is on the detection mouth that is communicated with air outlet hole on the described valve body, the import of described Decompression valves is communicated with described detection mouth.
6. reduction valve according to claim 5, it is characterized in that: described Decompression valves comprises that coaxial threaded is connected the described tubular valve seat that detects on the mouth, the endoporus of described tubular valve seat is shoulder hole, the aperture opening of described tubular valve seat is communicated with described detection mouth, be sealed with bonnet on the big end opening of described tubular valve seat, but and in the macropore section of tubular valve seat vertically guiding be equipped with the occluding body of interior end opening of shutoff aperture section, also be equiped with in the macropore section of described tubular valve seat for promoting the Returnning spring that occluding body moves to small end, offer on the hole wall of the macropore section of described tubular valve seat for when the interior end opening of aperture section is opened, the relief passage that is communicated with aperture section by the macropore section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205477422U CN203067919U (en) | 2012-10-24 | 2012-10-24 | Reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205477422U CN203067919U (en) | 2012-10-24 | 2012-10-24 | Reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203067919U true CN203067919U (en) | 2013-07-17 |
Family
ID=48766703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205477422U Expired - Lifetime CN203067919U (en) | 2012-10-24 | 2012-10-24 | Reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203067919U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943922A (en) * | 2012-10-24 | 2013-02-27 | 河南航天液压气动技术有限公司 | Pressure reducing valve |
| CN104534134A (en) * | 2014-11-12 | 2015-04-22 | 浙江盾安阀门有限公司 | High-precision diaphragm type muting pressure reduction valve |
| CN105889589A (en) * | 2014-10-16 | 2016-08-24 | 河南航天液压气动技术有限公司 | Electronic control pilot-operated type high-precision large-flow regulating valve |
| CN106352128A (en) * | 2016-10-25 | 2017-01-25 | 浙江盾安智控科技股份有限公司 | Automatic valve core component and differential pressure-independent type flow control valve |
-
2012
- 2012-10-24 CN CN2012205477422U patent/CN203067919U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943922A (en) * | 2012-10-24 | 2013-02-27 | 河南航天液压气动技术有限公司 | Pressure reducing valve |
| CN105889589A (en) * | 2014-10-16 | 2016-08-24 | 河南航天液压气动技术有限公司 | Electronic control pilot-operated type high-precision large-flow regulating valve |
| CN104534134A (en) * | 2014-11-12 | 2015-04-22 | 浙江盾安阀门有限公司 | High-precision diaphragm type muting pressure reduction valve |
| CN104534134B (en) * | 2014-11-12 | 2017-07-21 | 浙江盾安阀门有限公司 | The Jing Yin pressure-reducing valve of high-precision membrane chip |
| CN106352128A (en) * | 2016-10-25 | 2017-01-25 | 浙江盾安智控科技股份有限公司 | Automatic valve core component and differential pressure-independent type flow control valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130717 |
|
| CX01 | Expiry of patent term |