CN108119683A - A kind of valve core structure and pressure reducing valve - Google Patents

A kind of valve core structure and pressure reducing valve Download PDF

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Publication number
CN108119683A
CN108119683A CN201711367058.XA CN201711367058A CN108119683A CN 108119683 A CN108119683 A CN 108119683A CN 201711367058 A CN201711367058 A CN 201711367058A CN 108119683 A CN108119683 A CN 108119683A
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CN
China
Prior art keywords
valve
gasket
valve seat
endoporus
core structure
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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.)
Pending
Application number
CN201711367058.XA
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Chinese (zh)
Inventor
胡立峰
周德文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIERUI ENTERPRISE (SHANGHAI) CO Ltd
Gentec Shanghai Corp
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JIERUI ENTERPRISE (SHANGHAI) CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to CN201711367058.XA priority Critical patent/CN108119683A/en
Publication of CN108119683A publication Critical patent/CN108119683A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20Excess-flow valves

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Abstract

The invention discloses a kind of valve core structure and pressure reducing valve, which mainly includes valve seat, gasket, valve rod, piston guide rod, and interconnected step endoporus is disposed with along its axial direction inside valve seat, seals adjustment hole, support guide hole;Radial direction gas port is disposed radially, the radial direction gas port is connected with sealing adjustment hole;The rounded shim-like of gasket, and have endoporus;Valve rod is step-like in cylinder, is placed in the step endoporus of valve seat, top is worn in the endoporus of gasket, can be with the sealing adjustment hole of the inner hole seal valve seat of gasket;Piston guide rod is step-like in cylinder, and by being placed in the support guide hole of valve seat for O-ring dynamic sealing, one end is combined into one with valve stem tip cooperation.Scheme reliability higher provided by the invention, failure risk smaller, admission pressure variation are small on outlet pressure influence, and pressure stability performance is more superior, can meet high request of the fields such as medical treatment, inspection, semiconductor, food to decompression valve performance.

Description

A kind of valve core structure and pressure reducing valve
Technical field
The present invention relates to pressure reducing valves, and in particular to gas decompression valve technology.
Background technology
In medical gas and industrial gas field, such as medical anesthesia respiration, industrial gasses welding, control laboratory are examined, and half The fields such as conductor industry or food packing industry.It is typically to be stored in by compression in gas cylinder for storage and convenient transportation gas, Gas pressure need to be reduced during use to using required pressure as desired by pressure reducing valve.
In use, cylinder gas slow consumption, pressure can also be gradually lowered to minimum residual voltage.Gas stores up during beginning It is very high to deposit pressure, more than 15MPa, and pressure is actually used only less than 0.6MPa, inlet and outlet pressure difference is larger, the sealing of valve seat It is it is required that high.When being exhausted soon to gas, storage pressure only has 1MPa.Admission pressure is high, and variation is big, and pressure reducing valve outlet pressure is influenced Greatly, it is the performance obtained, at present using soft sealing structure, valve opening diameter does small as far as possible.
Referring to Fig. 1 and Fig. 2, for one of typical valve base of pressure reducing valve sealing structure at present, mainly include:Diaphragm (1), pressure regulation Spring (2), upper cover (3), valve-stem guide (4), gasket (5), valve seat (6), valve rod (7), valve core spring (8), valve body (9).Pass through Pressure sensitive on diaphragm (1) surface and the dynamic balance relation of pressure spring (2) control opening for sealing and valve base chamber on valve rod Degree, is held essentially constant using output pressure.But from fields such as medical treatment, inspection, semiconductor, food to decompression valve performance High request still has gap.
Such valve base of pressure reducing valve sealing structure has the following problems (referring to Fig. 2) in actual use process:
First, due to valve opening to be done it is as far as possible small, guide rod (4) be mounted on gasket (5) in, bearing area is limited.It is high After fast air-flow is by valve seat, turbulent flow can be generated, when the frequency of surging is consistent with the resonant frequency of spool, resonance can be generated.Make With both can avoiding frequency as far as possible by adjusting uninterrupted, avoid resonating.But inevitably occur resonating in short-term once in a while;And Once resonance, guide rod (4) will penetrate gasket (5), gasket is caused to leak (Fig. 3).
Second, since guide rod (4) need to be fitted into gasket (5), the opening diameter of valve cannot do small, admission pressure variation When, it is affected to outlet pressure.
It can be seen that providing, a kind of security is reliable, and the pressure reducing valve scheme that output pressure is stablized is this field urgent need to resolve The problem of.
The content of the invention
For the problems of existing pressure reducing valve, it is necessary to which a kind of security is reliable, the new decompression of output pressure stabilization Valve scheme.
For this purpose, problem to be solved by this invention is to provide a kind of valve core structure, and provides subtract accordingly on this basis Pressure valve, thus come the defects of overcoming present in the prior art.
To solve the above-mentioned problems, valve core structure provided by the invention, including:
Valve seat is disposed with interconnected step endoporus inside the valve seat along its axial direction, seals adjustment hole, branch Support pilot hole;Radial direction gas port is disposed radially, the radial direction gas port is connected with sealing adjustment hole;
Gasket, the rounded shim-like of the gasket, and have endoporus;The gasket is placed in the step of valve seat The bottom of endoporus, endoporus thereon are connected with the sealing adjustment hole of valve seat;
Valve rod, the valve rod is step-like in cylinder, is placed in the step endoporus of valve seat, top wears the interior of gasket Kong Zhong, can be with the sealing adjustment hole of the inner hole seal valve seat of gasket;
Piston guide rod, the piston guide rod is step-like in cylinder, passes through the support for being placed in valve seat of O-ring dynamic sealing In pilot hole, one end is combined into one with the valve stem tip cooperation being threaded through in gasket endoporus.
Further, the upper end of the valve rod is step-like in three-level cylinder, passes through circle between top most thin segment and interlude Platform changeover portion connects.
Further, sleeve is further included in the valve core structure, the sleeve is integrally step-like in cylinder, is integrally embedded In valve seat.
Further, it is provided with connection screw thread outside the valve seat.
Further, the O-ring can generate damping.
To solve the above-mentioned problems, pressure reducing valve provided by the invention, including upper cover, pressure spring, diaphragm with valve core spring And valve body, further include above-mentioned valve core structure, the valve core structure is placed in by valve core spring in valve body, and with diaphragm phase Cooperation.
Further, seal washer is set between the valve core structure and valve body.
It is close to avoid guide rod breakdown by unique valve seat and guide rod structure and fit system for scheme provided by the invention The native defect of seal point, and spool, valve rod positioning is caused to be not easy to deviate;Increase O-ring damping, overcome valve rod in high-speed flow Issuable vibration improves vibration and utters long and high-pitched sounds.Meanwhile be oriented to air-flow, it avoids generating impact to diaphragm, reduces potential diaphragm Failure risk.
Scheme reliability higher provided by the invention, failure risk smaller, admission pressure variation are small on outlet pressure influence, Pressure stability performance is more superior, can meet high request of the fields such as medical treatment, inspection, semiconductor, food to decompression valve performance.
Description of the drawings
It is further illustrated the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is existing valve base of pressure reducing valve sealed structural representation;
Fig. 2 is existing pressure reducing valve valve core structure schematic diagram;
Fig. 3 is to have valve base of pressure reducing valve sealing structure guide rod to puncture gasket schematic diagram;
Fig. 4 be in present example reducer unit into structure diagram;
Fig. 5 is valve core structure schematic diagram in present example;
Fig. 6 is the explosive view of spool in present example.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below Conjunction is specifically illustrating, and the present invention is further explained.
Referring to Fig. 4 to Fig. 6 which shows a composition topology example of the pressure reducing valve that this example provides.
As seen from the figure, this pressure reducing valve will be by diaphragm 1 in composition structure, pressure spring 2, upper cover 3, valve rod 4, gasket 5, Valve seat 6, sleeve 7, valve core spring 8, valve body 9, seal washer 10, piston guide rod 11 and the cooperation of O-ring 12 are formed.
Wherein, diaphragm 1, pressure spring 2, upper cover 3 and valve body 9 form the agent structure of entire pressure reducing valve, and valve rod 4, Gasket 5, valve seat 6, sleeve 7, valve core spring 8, piston guide rod 11 and the cooperation of O-ring 12 form the spool of entire pressure reducing valve, The spool safety and stability is reliable, and output pressure stabilization can be achieved coordinating with valve body.
Referring to Fig. 4, the upper cover 3 in this pressure reducing valve, whole in cylinder, inside has step endoporus to match somebody with somebody with 9 screw thread of valve body Merga pass diaphragm 1 seals.
Pressure spring 2 be cylindroid helical-coil compression spring, be integrally placed in the step endoporus in upper cover 3, and with diaphragm 1 Cooperation.
And valve body 9, it is integrally rectangle, inside has through stepped hole and air inlet/outlet, one end connection inlet suction port, another End installation valve core structure.Thus the agent structure of entire pressure reducing valve is formed.
Referring to Fig. 5 and Fig. 6, valve seat 6 is forms the main element of spool, for carrying other spool building blocks.The valve Seat 6 is whole step-like in hexahedron cylinder, inside along it axially provide interconnected step endoporus successively, sealing is adjusted Knothole, support guide hole;Here step endoporus as placement hole, has and is cooperatively formed as gas port and sealing adjustment hole The airtube of salable adjusting.
Meanwhile the hex surface of valve seat 6 is respectively equipped with radial direction gas port and is connected with sealing adjustment hole, thus forms and completely leads Air flue realizes the radial direction export of air-flow, avoids direct Impact Diaphragm.
Furthermore the external band connection external screw thread of valve seat 6, with 9 middle part screw-internal thread fit of valve body and pass through seal washer 10 into Row sealing.
The whole rounded shim-like of gasket 5, and offer endoporus;The gasket 5 is placed in the step endoporus of valve seat 6 Bottom, the endoporus thereon just sealing adjustment hole coaxial communication with valve seat.It can to the planform of endoporus on the gasket 5 Depending on actual demand, preferably, this example using top pyramidal structure is gone, so can carry out face cooperation with valve rod 4, protect Card sealing and regulating effect.
Sleeve 7 is whole step-like in hollow cylinder, and the sleeve 7 is whole to be embedded in the step endoporus of valve seat 6, to platform The gasket 5 of stepped endoporus bottom, which is formed, to be fixed;Sealing is realized in 7 port of sleeve by seal washer 10 and the cooperation of valve body 9 simultaneously.
Valve rod 4, entirety are placed in valve seat 6, and can be moved along valve seat 6, at the same by movement can with it is close Packing 5 coordinates, and realizes and entire air flue is sealed or adjusted.
The top of the valve rod 4 is step-like in cylinder, is specially that three-level cylinder is step-like, coordinates for being disposed with valve seat 6;And Lower part is direct rod shape, for disposing valve core spring 8.In the three-level cylinder step-like structure on 4 top of valve rod, largest segment is as valve The construction section of bar 4, the whole inner hole with sleeve 7, and the placement of Integral movable is wherein;Interlude, which is used as, adjusts section, Integrally through sleeve 7 so that top and the inner hole of gasket 5, and the most thin segment at top is threaded through in gasket 5, is used for Connect piston guide rod 11.
In the present solution, interlude top (i.e. interlude and top in the three-level cylinder step-like structure on 4 top of valve rod Most thin segment connecting portion) preferably frustum cone structure (being connected between the most thin segment of interlude and top by round platform changeover portion), By the side of the frustum cone structure with the inner hole in gasket 5, it can be achieved that the linear regulation of air flue, ensures what air-flow was adjusted Linear and stability.
Piston guide rod 11, whole step-like in cylinder, outside opens up corresponding resettlement groove, for disposing corresponding O Type circle 12.The piston guide rod 11 is placed in by 12 Integral movable of O-ring in resettlement groove in 6 support guide hole of valve seat, One end and the top cooperation of valve rod 4 are combined into one, and the other end coordinates with diaphragm 1.The piston guide rod 11 of such structure is by O-shaped Circle 12 coordinates with 6 support guide hole of valve seat, realizes reliable and stable movement, then the top of valve rod 4 can be formed reliable and stable Guide support, it is made to be always ensured that axial movement.
Valve core spring 8, the preferred cylindroid helical-coil compression spring of this programme, entirety are set on valve rod 4, by with valve body 9 Cooperation provides elastic force to valve rod 4.
Thus in the pressure reducing valve formed, 4 upper end of valve rod obtains guide support, increases O-ring damping, valve rod is overcome to exist Issuable vibration in high-speed flow.Change has also been made in the structure of gasket simultaneously, avoids guide rod breakdown gasket phenomenon, And make to change direction by the high-speed flow after seal valve seat 6, not direct Impact Diaphragm 1 reduces diaphragm 1 and is impacted.
From the foregoing, it will be observed that this example approach increases and lives by changing the internal structure of seal valve seat 6, valve rod 4 and gasket 5 Fill in guide rod 11 and O-ring 12 so that 4 upper end of valve rod obtains guide support, increases O-ring damping, overcomes valve rod in high speed gas Issuable vibration in stream improves vibration and utters long and high-pitched sounds.Gasket based on circular pad sheet simultaneously, and using the spray of plain cushion structure Mouth, easy to process and inspection.This programme may be such that spool, valve rod positioning are not easy to deviate, and reduction causes other foreign-matter contaminations etc. Influence to sealing surface, while exempted from guide rod breakdown gasket phenomenon, and make through the high-speed flow change side after seal valve seat 6 To not direct Impact Diaphragm 1, so as to effectively improve the safety and reliability of entire structure of relief pressure valve.
Basic principle, main feature and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (7)

1. valve core structure, which is characterized in that including:
Valve seat is disposed with interconnected step endoporus inside the valve seat along its axial direction, seals adjustment hole, and support is led Xiang Kong;Radial direction gas port is disposed radially, the radial direction gas port is connected with sealing adjustment hole;
Gasket, the rounded shim-like of the gasket, and have endoporus;The gasket is placed in the step endoporus of valve seat Bottom, endoporus thereon connects with the sealing adjustment hole of valve seat;
Valve rod, the valve rod is step-like in cylinder, is placed in the step endoporus of valve seat, top wears the endoporus of gasket In, it can be with the sealing adjustment hole of the inner hole seal valve seat of gasket;
Piston guide rod, the piston guide rod is step-like in cylinder, passes through the support guide for being placed in valve seat of O-ring dynamic sealing Kong Zhong, one end are combined into one with the valve stem tip cooperation being threaded through in gasket endoporus.
2. valve core structure according to claim 1, which is characterized in that the upper end of the valve rod is step-like in three-level cylinder, It is connected between top most thin segment and interlude by round platform changeover portion.
3. valve core structure according to claim 1, which is characterized in that sleeve, the set are further included in the valve core structure Cylinder is whole step-like in cylinder, is integrally embedded in valve seat.
4. valve core structure according to claim 1, which is characterized in that be provided with connection screw thread outside the valve seat.
5. valve core structure according to claim 1, which is characterized in that the O-ring can generate damping.
6. pressure reducing valve, including upper cover, pressure spring, diaphragm with valve core spring and valve body, which is characterized in that further include claim Valve core structure any one of 1-5, the valve core structure are placed in by valve core spring in valve body, and are matched with diaphragm It closes.
7. pressure reducing valve according to claim 6, which is characterized in that gasket is set between the valve core structure and valve body Circle.
CN201711367058.XA 2017-12-18 2017-12-18 A kind of valve core structure and pressure reducing valve Pending CN108119683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711367058.XA CN108119683A (en) 2017-12-18 2017-12-18 A kind of valve core structure and pressure reducing valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711367058.XA CN108119683A (en) 2017-12-18 2017-12-18 A kind of valve core structure and pressure reducing valve

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108626424A (en) * 2018-06-25 2018-10-09 上海汉虹精密机械有限公司 The sealed special-shaped valve of semiconductor monocrystal furnace gas capsule
CN110559515A (en) * 2019-09-09 2019-12-13 青岛大学附属医院 drug delivery device for anesthetic
CN110630790A (en) * 2019-08-29 2019-12-31 南京伟易达机电科技发展有限公司 High-pressure piston group
CN112797207A (en) * 2021-03-01 2021-05-14 四川长仪油气集输设备股份有限公司 Pilot-operated pipeline explosion positive and negative action axial flow type self-closing valve

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2315377Y (en) * 1997-08-28 1999-04-21 陈久挺 Diaphragm valve
CN2511843Y (en) * 2001-10-23 2002-09-18 河北平衡阀门制造有限公司 Self-force flow-adjusting control valve
JP2006153160A (en) * 2004-11-30 2006-06-15 Tokai Corp Check valve structure, valve element for check valve, and method for manufacturing valve element for check valve
JP2009074656A (en) * 2007-09-21 2009-04-09 Miura Co Ltd Constant flow rate valve with checking function
CN104075003A (en) * 2014-06-30 2014-10-01 无锡市威海达机械制造有限公司 Ultrahigh pressure one-way valve
CN205479568U (en) * 2016-03-15 2016-08-17 捷锐企业(上海)有限公司 Relief pressure valve of high reliability
CN105987210A (en) * 2015-03-16 2016-10-05 阿自倍尔株式会社 Pressure-reducing valve
CN206682326U (en) * 2017-04-20 2017-11-28 浙江万国流体设备科技有限公司 A kind of pipeline valve device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2315377Y (en) * 1997-08-28 1999-04-21 陈久挺 Diaphragm valve
CN2511843Y (en) * 2001-10-23 2002-09-18 河北平衡阀门制造有限公司 Self-force flow-adjusting control valve
JP2006153160A (en) * 2004-11-30 2006-06-15 Tokai Corp Check valve structure, valve element for check valve, and method for manufacturing valve element for check valve
JP2009074656A (en) * 2007-09-21 2009-04-09 Miura Co Ltd Constant flow rate valve with checking function
CN104075003A (en) * 2014-06-30 2014-10-01 无锡市威海达机械制造有限公司 Ultrahigh pressure one-way valve
CN105987210A (en) * 2015-03-16 2016-10-05 阿自倍尔株式会社 Pressure-reducing valve
CN205479568U (en) * 2016-03-15 2016-08-17 捷锐企业(上海)有限公司 Relief pressure valve of high reliability
CN206682326U (en) * 2017-04-20 2017-11-28 浙江万国流体设备科技有限公司 A kind of pipeline valve device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108626424A (en) * 2018-06-25 2018-10-09 上海汉虹精密机械有限公司 The sealed special-shaped valve of semiconductor monocrystal furnace gas capsule
CN108626424B (en) * 2018-06-25 2023-10-31 上海汉虹精密机械有限公司 Semiconductor single crystal furnace air bag sealing type special-shaped valve
CN110630790A (en) * 2019-08-29 2019-12-31 南京伟易达机电科技发展有限公司 High-pressure piston group
CN110559515A (en) * 2019-09-09 2019-12-13 青岛大学附属医院 drug delivery device for anesthetic
CN112797207A (en) * 2021-03-01 2021-05-14 四川长仪油气集输设备股份有限公司 Pilot-operated pipeline explosion positive and negative action axial flow type self-closing valve
CN112797207B (en) * 2021-03-01 2022-09-06 四川长仪油气集输设备股份有限公司 Pilot-operated pipeline explosion positive and negative action axial flow type self-closing valve

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Application publication date: 20180605