CN103542150A - Pressure reducing valve with valve closing function - Google Patents
Pressure reducing valve with valve closing function Download PDFInfo
- Publication number
- CN103542150A CN103542150A CN201310522045.0A CN201310522045A CN103542150A CN 103542150 A CN103542150 A CN 103542150A CN 201310522045 A CN201310522045 A CN 201310522045A CN 103542150 A CN103542150 A CN 103542150A
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- China
- Prior art keywords
- valve
- valve body
- diaphragm
- piston
- pressure reducing
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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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a pressure reducing valve with a valve closing function. The pressure reducing valve comprises a pressure reducing valve body, a water inlet cavity and a water outlet cavity. A transverse partition wall with a vertical through hole is arranged between the two cavities, and an upper valve cover and a lower valve cover are arranged on the upper and lower portions of the valve body. A valve rod connected with a diaphragm is arranged in the pressure reducing valve body, shares the same center line with upper and lower ports of the valve body and perpendicularly intersects with horizontal center lines of the water inlet cavity and the water outlet cavity. A guide sleeve is arranged at the upper port of the pressure reducing valve body, and a valve bush is arranged at the center of the transverse partition wall. The top end of the valve rod is connected with the diaphragm, a piston is arranged on the upper portion, a pressing plate is arranged in the middle of the valve rod and is matched with the upper plane of the valve bush to form an upper valve port, a sealing seat is arranged at the lower end of the valve rod, a sealing gasket is arranged on the sealing seat, and the sealing gasket and an annular cutting edge of the lower end of the valve bush form a lower valve port. An alarm unit communicated with a spring cavity is arranged on the upper valve cover on the upper end surface of the diaphragm.
Description
Technical field
The present invention relates to a kind of valve, relate in particular to a kind of reduction valve that closes valve function that has.
Background technique
Reduction valve has been widely used in water supply system and heating ventilation air-conditioning system, and the pressure adjusting problem and pressure and the flow controlled with water spot of pressure regulation and control with water spot of having determined is effectively situated between.The reduction valve of prior art, in order to improve degree of regulation and simplified structure, adopts diaphragm structure mostly, and during power disequilibrium on acting on diaphragm, band ovable valve stem moves up and down, and valve port is opened large or is turned down, to guarantee that delivery pressure is constant.Compare with piston type, its major defect is that diaphragm is more fragile, because diaphragm is mounted in valve body, when damage, user is unknown, once damage, the reduction valve decompression that do not recur, high-pressure medium can flow to valve or the pipeline in downstream, causes the damage of upstream device.
Diaphragm type pressure-reducing valve also has a problem, when the downstream long period does not need water, though valve port can be closed automatically, but when sealing force is inadequate, upstream high pressure water will leak downstream by the gap between valve seat and sealing gasket, cause the pressure in downstream line to raise, can cause equally the damage of upstream device.
Summary of the invention
Main purpose of the present invention is: develop and a kind ofly damage or when the downstream long period does not need water when diaphragm, the reduction valve of enough sealing forces can be closed and have to valve port automatically, can send alarm signal if desired, to avoid high-pressure medium to flow to downstream, cause the damage of upstream device.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of have the valve of a closing function
Reduction valve, there is relief valve body, described relief valve body substantially horizontal is respectively equipped with the consistent water-inlet cavity of center line and water chamber, between two chambeies, be provided with the across bulkhead with vertical through hole, on relief valve body, under have on, end opening, and be provided with bonnet and bottom flange, in bonnet, it is spring chamber, in spring chamber, be provided with screw rod and the spring of regulation output pressure, in relief valve body, be provided with the valve rod being connected with diaphragm, described valve rod and valve body upper, end opening has same center line, and with enter, the horizontal center line of water chamber intersects vertically, it is characterized in that: the described relief valve body guide sleeve that is provided with suitable for reading, in the vertical through hole of across bulkhead, be provided with valve pocket, described valve stem tip is connected with diaphragm, top is provided with piston, described piston and guide sleeve respective interior bores are slidably matched, piston is provided with O-ring seals, and described valve rod middle part is provided with pressing plate, and the lower plane of described pressing plate matches with plane on valve pocket and forms upper valve port, upper plane is provided with O-ring seals one, described valve rod lower end is provided with sealing seat, and sealing gasket is housed on sealing seat, and the annular cutting edge of described sealing gasket and valve pocket lower end forms lower valve port, be positioned on the bonnet of diaphragm upper-end surface top the warning device being communicated with spring chamber is housed.
Technological scheme of the present invention can also be further perfect:
As preferably, the bar of posting a letter that described warning device has valve body and joins with valve body cunning; Described valve body has step-like
Endoporus, its stage casing is cylinder barrel, and the external diameter of hypomere hollow shaft is provided with connecting thread, and upper end is provided with valve gap, and described valve gap is provided with center hole and air stream through hole; The described bar of posting a letter comprise the axostylus axostyle of joining with bonnet central bore cunning and with axostylus axostyle one the piston of joining with inner hole of cylinder cunning; The upper and lower balance spring that is provided with of described piston.
Beneficial effect of the present invention:
Have two valve ports, upper valve port V2 and lower valve port V1 are also provided with warning device.
1, when diaphragm damages, valve port can be closed automatically, and interrupting supplying water downstream in upstream, and sends alarm signal;
2, when the downstream long period does not need water, valve port is closed and can be produced enough sealing forces, improves the sealing of valve port, stops high pressure water pipe leakage downstream.
Thereby avoided the accident of leaking downstream the damage that causes upstream device due to high-pressure medium to occur.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of structural representation of the present invention;
Accompanying drawing 2 is warning device structure enlarged views of Fig. 1.
Description of reference numerals: 1, diaphragm, 2, bonnet, 3, sealing gasket two, 4, valve body, 5, O-ring seals two, 6, balance spring, 7, valve gap, 8, the bar of posting a letter, 9, relief valve body, 10, sealing gasket one, 11, valve pocket, 12, O-ring seals one, 13, valve rod, 14 guide sleeves, 15, spring, 16, O-ring seals two, 17, screw plug;
P1, inlet pressure, P2, outlet pressure, A, water-inlet cavity, B, water chamber, V1, lower valve port, V2, upper valve port, D, warning device, G, ball, H, spring chamber, K, air stream through hole;
D, through hole, m, pressing plate, a, aperture one, b, aperture two, c, aperture three.
Embodiment
Below by embodiment also by reference to the accompanying drawings, technological scheme of the present invention is further described in detail.
Embodiment:
As shown in Figure 1 there is the reduction valve that closes valve function, there is relief valve body 9, relief valve body 9 substantially horizontals are respectively equipped with the consistent water-inlet cavity A of center line and water chamber B, between two chambeies, be provided with the across bulkhead with vertical through hole d, relief valve body 9 is upper and lower to be had upper and lower through hole and is provided with bonnet 2 and bottom flange, in bonnet, it is spring chamber, in spring chamber, be provided with the screw rod and the spring 15 that adjust mouth pressure, O-ring seals 2 16 is equipped with in screw rod upper end, to guarantee the sealability of spring chamber.In relief valve body 9, be provided with the valve rod 13 being connected with diaphragm, upper and lower mouthful of described valve rod and valve body 9 has same center line, and intersects vertically with the horizontal center line into and out of water cavity.Described relief valve body 9 guide sleeve 14 that is provided with suitable for reading, is provided with valve pocket 11 in the vertical through hole d of across bulkhead, and O-ring seals 1 is equipped with in valve pocket upper-end surface; Described valve rod 13 tops are provided with piston, the respective interior bores of described piston and guide sleeve 14 is slidably matched, piston is provided with O-ring seals, described valve rod middle part is provided with pressing plate m, the lower plane of described pressing plate matches with the upper plane of valve pocket 11 and forms upper valve port V2, described valve rod lower end is provided with sealing seat, and sealing gasket 1 is housed on sealing seat, and described sealing gasket 1 forms lower valve port V1 with the annular cutting edge of valve pocket 11 lower ends.
Warning device D as shown in Figure 2, is arranged on the bonnet 2 that reduction valve is positioned at diaphragm 1 upper-end surface, and described warning device D is communicated with spring chamber H.By valve body 4, the bar 8 of posting a letter, balance spring 6(, by upper and lower two springs, formed), the part such as O-ring seals 25, valve gap 7 and sealing gasket 23 forms.Valve body 4 has step-like endoporus, and the cylinder barrel in its stage casing is joined with the piston cunning in bar 8 stage casings of posting a letter, and piston is divided into epicoele and cavity of resorption the inner chamber of valve body 4, and And is stoped the leakage of medium between two chambeies by O-ring seals 1, the valve gap 7 use external thread rotaries with air stream through hole K are combined in the internal thread of valve body 4 upper ends, and the cylinder barrel cunning of the cylndrical surface of its lower sleeve and valve body 4 is joined, and therefore after assembling, the axis of its center hole is consistent with the axis of valve body 4 cylinder barrels, the long shaft rod of bar 8 of posting a letter slides in the center hole of valve gap 7, therefore, the axis of bar 1 of posting a letter after installation is consistent with the axis of valve body 4 cylinder barrels, and can in cylinder barrel, freely move up and down, limit the upper lower end surface of valve gap 7 sleeves that is subject to that the bar 1 of posting a letter moves, the next restriction that is subject to its stub shaft lower end surface, between the pit bottom surface of valve gap 7 and piston upper-end surface and between the bottom surface of valve body 4 cylinder barrels and piston lower surface, be provided with balance spring 6, on, lower spring all has certain pre compressed magnitude after installing, therefore post a letter bar 1 under the effect of two springs in equilibrium position, when reduction valve works, its position can be regulated automatically by the variation of air density in spring chamber H, the lower end of valve body 4, with outside thread, screw near sloping platform Minus pressure valve bonnet 2 flange edges, And prevents that by sealing gasket 23 medium from leaking, aperture one a of its lower end communicates with aperture two b on sloping platform and aperture three c, in order to the pressure in spring chamber H is delivered to the lower end of bar 1 piston of posting a letter
The present invention and common reduction valve are that in constructional difference valve rod has two valve ports, and upper valve port V2 and lower valve port V1 are also provided with warning device.
1,, in water supply process, valve rod 13 stressed is balance all the time on dynamically, therefore can guarantee delivery pressure P2
Constant.When diaphragm 1 damages suddenly, press water enters into spring chamber H from water chamber B, diaphragm 1 epicoele (spring chamber) pressure raises, the stressed disequilibrium of valve rod 13, under the pressure of spring 15, the parts such as diaphragm 1, valve rod 13 move downward, until the lower plane of the pressing plate m on valve rod 13 contacts, compresses with the O-ring seals 12 that is arranged on valve seat 11 tops, now go up valve port V2 and shut, upstream stops supplying water downstream.
The condition that valve port V2 reliably closes valve is:
（P1-P2）·S1﹤K·X
In formula:
P1-inlet pressure
P2-outlet pressure
The area of S1-valve pocket 11 endoporus d
The rigidity of K-spring 15
The decrement of X-spring 15
From above formula, when Pressure reducing ratio hour, (P1-P2) less, and amount of spring compression X is larger, therefore closes power
Larger, close valve reliability relatively high.
When upper valve port V2 closes, the press water of spring chamber H acts on the lower end of the bar 8 of posting a letter by aperture c, b, a
On face, the bar 8 that promotes to post a letter moves upward, until the axostylus axostyle on its top all stretches out, makes electric switch (not shown in FIG.) action, sends alarm signal.
2, when downstream does not need water, lower valve port V1 closes gradually automatically, and outlet pressure raises gradually, acts on diaphragm 1
The pressure of cavity of resorption also raises gradually, and when outlet pressure P2 reaches setting value, the pressure that overcomes spring 1 is closed lower valve port V1.If the downstream long period does not need water, but valve closed force is when large not, and inlet pressure P1 can leak to water chamber B by the gap between lower valve port V1 sealing surface so, causes the continuation of downstream (outlet) pressure P 2 to raise, and can make equally upstream device cause damage.For Leakage prevention, the design of reduction valve must meet following condition:
P2·S-K·X﹥C
P2-outlet pressure, P2 must be less than the authorized pressure of upstream device or pipeline
S-diaphragm 1 lifting surface area
The rigidity of K-spring 15
The decrement of X-spring 15
C-the guarantee minimum sealing force that lower valve port V1 reliably closes
From above formula, the first measure of Leakage prevention is the area S that increases diaphragm 1, but S must be appropriate, otherwise valve volume can be too large, the power of closing of upper valve port V2 in the time of also can affecting diaphragm 1 damage; The second measure is to reduce minimum sealing force C, for this reason, can reduce the annular sword limit of valve pocket 11 belows and the area of contact of sealing gasket 1, but can not make the contact stress of the two too large, otherwise the life-span that can reduce sealing gasket 10.In this patent, the head on annular sword limit being made to semicircle shape, is line contact when sealing starts like this, along with the increase of impacting force becomes face contact, is conducive to improve the force-bearing situation of sealing gasket 10.
Claims (2)
1. there is a reduction valve that closes valve function, there is relief valve body (9), described relief valve body level side
To being respectively equipped with the consistent water-inlet cavity of center line (A) and water chamber (B), between two chambeies, be provided with the across bulkhead with vertical through hole, on relief valve body (9), under have on, end opening, and be provided with bonnet (2) and bottom flange, in bonnet, be spring chamber (H), in spring chamber, be provided with screw rod and the spring (15) of regulation output pressure, in relief valve body (9), be provided with the valve rod (13) being connected with diaphragm (1), described valve rod and valve body upper, end opening has same center line, and with enter, water chamber (A), (B) horizontal center line intersects vertically, it is characterized in that: described relief valve body (9) guide sleeve (14) that is provided with suitable for reading, in the vertical through hole of across bulkhead, be provided with valve pocket (11), described valve rod (13) top is connected with diaphragm, top is provided with piston, described piston and guide sleeve (14) respective interior bores is slidably matched, piston is provided with O-ring seals, described valve rod (13) middle part is provided with pressing plate (m), the lower plane of described pressing plate matches and forms upper valve port (V2) with the upper plane of valve pocket (11), upper plane is provided with O-ring seals one (12), described valve rod (13) lower end is provided with sealing seat, sealing gasket (10) is housed on sealing seat, and described sealing gasket (10) forms lower valve port (V1) with the annular cutting edge of valve pocket lower end, be positioned on the bonnet (2) of diaphragm (1) upper-end surface top the warning device (D) being communicated with spring chamber (H) is housed.
2. according to claim 1 have a reduction valve that closes valve function, it is characterized in that: described warning device
The bar of posting a letter (8) that there is valve body (4) and join with valve body cunning; Described valve body has step-like endoporus, and its stage casing is cylinder barrel, and the external diameter of hypomere hollow shaft is provided with connecting thread, and upper end is provided with valve gap (7), and described valve gap is provided with center hole and air stream through hole (K); The described bar of posting a letter (8) comprise the axostylus axostyle of joining with bonnet central bore cunning and with axostylus axostyle one the piston of joining with inner hole of cylinder cunning; The upper and lower balance spring (6) that is provided with of described piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310522045.0A CN103542150A (en) | 2013-10-30 | 2013-10-30 | Pressure reducing valve with valve closing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310522045.0A CN103542150A (en) | 2013-10-30 | 2013-10-30 | Pressure reducing valve with valve closing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103542150A true CN103542150A (en) | 2014-01-29 |
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ID=49965888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310522045.0A Pending CN103542150A (en) | 2013-10-30 | 2013-10-30 | Pressure reducing valve with valve closing function |
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| Country | Link |
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| CN (1) | CN103542150A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534154A (en) * | 2014-12-30 | 2015-04-22 | 特瑞斯能源装备股份有限公司 | Blow-off valve |
| CN104879540A (en) * | 2014-09-24 | 2015-09-02 | 杭州春江阀门有限公司 | Pressure reducing valve with valve closing function |
| CN105202233A (en) * | 2014-09-24 | 2015-12-30 | 杭州春江阀门有限公司 | High-performance reducing valve with valve closing function |
| CN105402451A (en) * | 2015-10-28 | 2016-03-16 | 杭州春江阀门有限公司 | Low-noise pressure reducing valve |
| CN108799583A (en) * | 2018-08-27 | 2018-11-13 | 成都川力智能流体设备股份有限公司 | A kind of pressure reducing valve feedback gas balancer |
| CN111081480A (en) * | 2019-12-25 | 2020-04-28 | 湖南博信新能源科技有限公司 | Electrolyte pressure adjusting device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0272276A (en) * | 1988-09-07 | 1990-03-12 | Hitachi Ltd | Safety valve |
| JP2000120895A (en) * | 1998-10-16 | 2000-04-28 | Nippon Walbro:Kk | Diaphragm type pressure reducing valve |
| CN2636019Y (en) * | 2003-07-24 | 2004-08-25 | 谷红军 | Gas presure regulator |
| CN201301991Y (en) * | 2008-11-14 | 2009-09-02 | 西安长庆科技工程有限责任公司 | Pneumatic extinguishing protection isolating valve with alarm output |
| CN102853155A (en) * | 2012-08-30 | 2013-01-02 | 杭州春江阀门有限公司 | Adjustable pressure reducing valve with high pressure reducing ratio |
| CN202834348U (en) * | 2012-08-30 | 2013-03-27 | 杭州春江阀门有限公司 | Valve membrane damage-alarming device |
| CN103363165A (en) * | 2012-03-27 | 2013-10-23 | 株式会社不二工机 | Reducing valve |
-
2013
- 2013-10-30 CN CN201310522045.0A patent/CN103542150A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0272276A (en) * | 1988-09-07 | 1990-03-12 | Hitachi Ltd | Safety valve |
| JP2000120895A (en) * | 1998-10-16 | 2000-04-28 | Nippon Walbro:Kk | Diaphragm type pressure reducing valve |
| CN2636019Y (en) * | 2003-07-24 | 2004-08-25 | 谷红军 | Gas presure regulator |
| CN201301991Y (en) * | 2008-11-14 | 2009-09-02 | 西安长庆科技工程有限责任公司 | Pneumatic extinguishing protection isolating valve with alarm output |
| CN103363165A (en) * | 2012-03-27 | 2013-10-23 | 株式会社不二工机 | Reducing valve |
| CN102853155A (en) * | 2012-08-30 | 2013-01-02 | 杭州春江阀门有限公司 | Adjustable pressure reducing valve with high pressure reducing ratio |
| CN202834348U (en) * | 2012-08-30 | 2013-03-27 | 杭州春江阀门有限公司 | Valve membrane damage-alarming device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879540A (en) * | 2014-09-24 | 2015-09-02 | 杭州春江阀门有限公司 | Pressure reducing valve with valve closing function |
| CN105202233A (en) * | 2014-09-24 | 2015-12-30 | 杭州春江阀门有限公司 | High-performance reducing valve with valve closing function |
| CN104534154A (en) * | 2014-12-30 | 2015-04-22 | 特瑞斯能源装备股份有限公司 | Blow-off valve |
| CN105402451A (en) * | 2015-10-28 | 2016-03-16 | 杭州春江阀门有限公司 | Low-noise pressure reducing valve |
| CN108799583A (en) * | 2018-08-27 | 2018-11-13 | 成都川力智能流体设备股份有限公司 | A kind of pressure reducing valve feedback gas balancer |
| CN108799583B (en) * | 2018-08-27 | 2024-02-13 | 成都川力智能流体设备股份有限公司 | Pressure reducing valve feedback gas balancer |
| CN111081480A (en) * | 2019-12-25 | 2020-04-28 | 湖南博信新能源科技有限公司 | Electrolyte pressure adjusting device |
| CN111081480B (en) * | 2019-12-25 | 2021-11-23 | 湖南法恩莱特新能源科技有限公司 | Electrolyte pressure adjusting device |
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Application publication date: 20140129 |