CN2172825Y - Pressure-relief constant pressure valve - Google Patents
Pressure-relief constant pressure valve Download PDFInfo
- Publication number
- CN2172825Y CN2172825Y CN 93242630 CN93242630U CN2172825Y CN 2172825 Y CN2172825 Y CN 2172825Y CN 93242630 CN93242630 CN 93242630 CN 93242630 U CN93242630 U CN 93242630U CN 2172825 Y CN2172825 Y CN 2172825Y
- Authority
- CN
- China
- Prior art keywords
- valve
- stuffing box
- box gland
- piston sleeve
- spool
- Prior art date
- 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 - Fee Related
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Abstract
The utility model discloses a pressure-relief valve with constant pressure used in a water feeding and draining system. The valve body has the inner structure that a lower cavity is a water inlet cavity and an upper cavity is a water outlet cavity, a valve seat, and a sealing sleeve and a piston sleeve which are matched with the valve seat are arranged between the two cavities. A valve core fixed on a diaphragm is penetrated through the middle of the piston sleeve which is fixed and positioned above the sealing sleeve, and is connected with the sealing sleeve which is driven by the valve core to move upward and downward in the middle of the valve seat to act the functions of opening and closing. The utility model has the advantages of small size, light weight, convenient installation and maintenance, etc. The stability of the rear pressure of the pressure-relief valve with constant pressure is good, the consistency of the flow characteristic of the same type is good, and simultaneously, a filter is also saved.
Description
The utility model relates to the mechanical pressure loading valve device that uses in a kind of supply and drain water system.Especially the decompression constant pressure valve device of forming by valve body, valve seat, stuffing box gland, piston sleeve, spool, diaphragm, spring, spring shield, adjustable lever, valve bottom.
The reduction valve that uses in the existing supply and drain water system of China is the spring diaphragm chip at present, and its structural feature is: the mouth that dams is tabular flap seal form, and the water inlet and outlet mode is that epicoele is a water outlet for the water intake cavity of resorption.The reduction valve of this structure has a lot of outstanding shortcomings, one, and the Sealing valve plate is a plane shape, area of contact is big, and directly is subjected to the effect of upstream pressure, thereby the pressure behind the valve influences by it with regard to corresponding, makes its instability; Its two, because of being subjected to the influence of machining accuracy, after the part assembling, the gap between flap and the valve seat is promptly unadjustable, like this, for the reduction valve of same model, the Flow characteristics of its each valve port is all inconsistent, sample of a valve brings great inconvenience to test; They are three years old, reduction valve needs bigger flow and advantages of higher stability, and for reaching this requirement, the useful area that then need strengthen sealing of tabular flap and diaphragm, therefore just correspondingly strengthened the weight of reduction valve, whole reduction valve has just become a dumbbell that volume is big, weight is big.As the reduction valve of DN100 type, weight reach more than 125 kilograms (L=460mm, H=900mm), big like this weight and volume is given and is installed and maintenance has brought inconvenience, even can't install in some occasion at all; Its four, need open upper and lower covers during maintenance, very inconvenient.
It is little that purpose of the present invention just provides a kind of volume, in light weight, downstream pressure good stability, same model Flow characteristics high conformity and decompression constant pressure valve easy to maintenance.
For achieving the above object, the technical solution adopted in the utility model is: this decompression constant pressure valve is made up of valve body ［ 6 ］, valve seat ［ 4 ］, stuffing box gland ［ 15 ］, piston sleeve ［ 7 ］, spool ［ 14 ］, diaphragm ［ 8 ］, spring ［ 10 ］, adjustable lever ［ 11 ］, spring shield ［ 9 ］, filter screen ［ 2 ］, valve bottom ［ 1 ］.The valve body inner structure is divided two chambeies up and down, it is down water-inlet cavity ［ 3 ］, go up and be water chamber ［ 16 ］, valve seat ［ 4 ］ places between two chambeies and maintains static, stuffing box gland ［ 15 ］ is formed Sealing with piston sleeve ［ 7 ］, stuffing box gland is the thin-walled cylinder of a both ends open, and links to each other with nut with spool ［ 14 ］ lower end, and its outer wall and valve base inner wall are complementary and can move up and down; The stuffing box gland top is the piston sleeve suitable for reading ［ 7 ］ that can cover it, and its end is along placing transfixion on the valve body.Water is entered by water-inlet cavity ［ 3 ］, by stuffing box gland, rises to the stuffing box gland water chamber ［ 16 ］ that flows to suitable for reading, and the upper end is fixed on spool on the diaphragm and drives stuffing box gland by Regulation spring and do and move up and down, and plays the effect of Push And Release.
Stuffing box gland in the said structure ［ 15 ］ bottom has the hole, and the gross area in hole is convenient to into water greater than circulation area suitable for reading.There is a hole centre of piston sleeve ［ 7 ］, passes for spool ［ 14 ］, and spool is moved up and down smoothly, covers stuffing box gland part in addition suitable for reading at piston sleeve and has downstream pressure feedback hole ［ 13 ］, makes downstream pressure can pass on the diaphragm ［ 8 ］.
In order to make decompression constant pressure valve good airproof performance, be equipped with sealing gasket ［ 5 ］ at the surface of contact place of piston sleeve ［ 7 ］ and stuffing box gland ［ 15 ］.Between stuffing box gland ［ 7 ］ and the valve seat ［ 4 ］ and the surface of contact place of piston sleeve ［ 7 ］ and spool ［ 14 ］ all is equipped with seal ring ［ 17 ］ and ［ 12 ］.
In water-inlet cavity ［ 3 ］, between valve seat ［ 4 ］ and the valve bottom ［ 1 ］ filter screen ［ 2 ］ can be installed, therefore saved a filter.
Owing to adopt above-mentioned technical solution scheme, the useful area that makes upstream pressure act on to dam mouthful diminishes, and upstream pressure do not directly act on the sealing running-on, thus downstream pressure influenced by upstream pressure little, improved its stability.Be that example is illustrated S with the DN100 specification below
1, S
1 ringFor before improving and the upstream pressure P after improving
1Act on the useful area on the mouth that dams, S
2, S
2 ringsFor before improving and the useful area of the diaphragm after improving:
S
1=R
2π=4416mm
2S
1 ring=R
2 2π-R
2 1π=687mm
2
S
2=R
2π=34618mm
2S
2 rings=R
2π=13266mm
2
From above-mentioned numeral, S
1 ringBe S
116%, S
1After reducing, upstream pressure P
1To S
1Corresponding the reducing of effect, make downstream pressure P
2Stability be enhanced about more than once.Stability behind the original valve is by strengthening S
2Area realize that this just makes the volume and weight of whole valve body all increase, the S after the improvement
2 ringsBe former S
238%, thereby reduced volume, reduce (reducing 56% than originally) and weight is also corresponding.Because the gap by between adjusting nut adjustable sealing cover and the piston sleeve makes the valve of same bore have the advantage of Flow characteristics high conformity.Also very convenient when installation and maintenance, only need loam cake is opened, core is taken out getting final product, need not open bottom.In addition, owing to increased filter screen, thereby saved a filter, reduce the part in the pipeline, reduced cost.
Therefore, the utlity model has that performance is good, volume is little, in light weight, characteristics such as cost is low, installation and maintenance are convenient, be fit to be installed in the various supply and drain water systems.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 is the erection drawing according to the designed decompression constant pressure valve of an optimum implementation of the present utility model.
In figure shown in Figure 1, the decompression constant pressure valve mainly consists of the following components: inside is divided into ［ 3 ］ and ［ 16 ］ valve body in two chambeies ［ 6 ］ up and down, be provided with fixing valve seat ［ 4 ］ between two chambeies, the Sealing that is complementary with it in the middle of the valve seat is stuffing box gland ［ 15 ］ and piston sleeve ［ 7 ］, the upper end of spool ［ 14 ］ is fixed on the diaphragm ［ 8 ］, run through piston sleeve ［ 7 ］, the lower end links to each other with stuffing box gland ［ 15 ］, be equipped with spring ［ 10 ］ and adjustable lever ［ 11 ］ on the diaphragm ［ 8 ］, outer cover spring shield ［ 9 ］, diaphragm ［ 8 ］ is fixed between spring shield ［ 9 ］ and the piston sleeve ［ 7 ］, is filter screen ［ 2 ］ between valve seat ［ 4 ］ and valve bottom ［ 1 ］.In the present embodiment, stuffing box gland ［ 15 ］ is made into the big down young bell shape that falls suitable for reading, the gross area that has hole, several water inlets ［ 18 ］ in Lower Half should be greater than the area of communication port, end mouth links to each other with spool ［ 14 ］ with nut, spool drives stuffing box gland and moves up and down, piston sleeve ［ 7 ］ has the bowl structure of a boss for the bottom, have a hole to allow spool ［ 14 ］ pass in the middle of the boss, the bottom of boss has one to match with it and the hollow sealing gasket ［ 5 ］ of big nut bottom the fixed piston cover.Piston sleeve ［ 7 ］ but end mouth capping stuffing box gland ［ 15 ］ suitable for reading has pressure feedback hole ［ 13 ］ so that downstream pressure can pass on the diaphragm on its wall.Be equipped with seal ring ［ 12 ］ and ［ 17 ］ at spool ［ 14 ］ with the surface of contact place of piston sleeve ［ 7 ］ and the surface of contact place of stuffing box gland ［ 15 ］ and valve seat ［ 4 ］.
During use, Regulation spring ［ 10 ］ makes spool ［ 14 ］ drive stuffing box gland ［ 15 ］ with the control water-outlet quantity, thereby reach the purpose of the pressure behind the control valve: water flows to from water-inlet cavity ［ 3 ］, by filter screen ［ 2 ］, enter from the bottom outlet ［ 18 ］ of stuffing box gland ［ 15 ］, rise to the water chamber ［ 16 ］ that flows to suitable for reading.When water chamber not during water, when promptly water did not flow behind the valve, its pressure increased, feed back on the diaphragm ［ 8 ］ from feedback hole ［ 13 ］, head on diaphragm and rise, the spool on the diaphragm ［ 14 ］ drive stuffing box gland ［ 15 ］ moves up then, up to closing water outlet, reach balance.When the water chamber water, pressure diminishes, and feeds back on the diaphragm by the pressure feedback hole, diaphragm under the effect of spring ［ 10 ］ to decline, move down thereby drive spool promotion stuffing box gland ［ 15 ］, the mouth that dams is opened, and water is from stuffing box gland inflow water chamber suitable for reading ［ 16 ］.In supply and drain water system, decompression constant pressure valve recloser plays the effect of decompression voltage stabilizing.
Claims (4)
1, a kind of decompression constant pressure valve, by valve body, valve seat, Sealing, diaphragm, adjustable lever, spring, spring shield, spool, the valve bottom is formed, valve body divides two chambeies up and down, valve seat is quiet to be placed between two chambeies, diaphragm, spring and adjustable lever fixedly are loaded in the valve body upper springs cover, the spool upper end is fixed on the spring diaphragm, it is characterized in that: the cavity of resorption [3] of valve body [6] is a water-inlet cavity, epicoele [16] is a water chamber, Sealing is to be made of stuffing box gland [15] and piston sleeve [7], stuffing box gland [15] is the thin-walled cylinder of a both ends open, the inwall of outer wall size and valve seat [4] is complementary and can moves up and down, and it is connected with nut with the lower end of spool [14], and piston sleeve [7] is positioned at the top of stuffing box gland [15], can the capping stuffing box gland [15] suitable for reading, and be placed in transfixion on the valve body.
2, according to the decompression constant pressure valve described in the claim 1, it is characterized in that: the bottom of stuffing box gland ［ 15 ］ has hole ［ 18 ］, and the gross area in hole must be greater than the stuffing box gland gross area suitable for reading; The central authorities of piston sleeve ［ 7 ］ have a hole that can allow spool ［ 14 ］ pass, and have pressure feedback hole ［ 13 ］ at it greater than stuffing box gland ［ 15 ］ part suitable for reading.
3, the decompression constant pressure valve described in claim 1, it is characterized in that: between stuffing box gland ［ 15 ］ and the valve seat ［ 4 ］, be equipped with seal ring ［ 17 ］ and ［ 12 ］ between piston sleeve ［ 7 ］ and the spool ［ 14 ］, piston sleeve ［ 7 ］ is equipped with sealing gasket ［ 5 ］ with stuffing box gland ［ 15 ］ surface of contact place.
4, the decompression constant pressure valve described in claim 1 is characterized in that: be provided with a filter screen ［ 2 ］ between valve seat ［ 4 ］ in water-inlet cavity ［ 3 ］ and the valve bottom ［ 1 ］.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93242630 CN2172825Y (en) | 1993-10-26 | 1993-10-26 | Pressure-relief constant pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93242630 CN2172825Y (en) | 1993-10-26 | 1993-10-26 | Pressure-relief constant pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2172825Y true CN2172825Y (en) | 1994-07-27 |
Family
ID=33816276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93242630 Expired - Fee Related CN2172825Y (en) | 1993-10-26 | 1993-10-26 | Pressure-relief constant pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2172825Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434695A (en) * | 2011-09-09 | 2012-05-02 | 西麦克阀门制造有限公司 | Angle-type and direct-acting pressure reducing valve |
| CN102473016A (en) * | 2009-07-10 | 2012-05-23 | 阿尔诺·德雷克塞尔 | Flow-through pressure regulator device for irrigation plants |
| CN102498323A (en) * | 2009-05-19 | 2012-06-13 | 科瓦尔株式会社 | Pressure reducing valve |
| CN102541096A (en) * | 2010-11-10 | 2012-07-04 | 奥文特罗普有限责任两合公司 | Flow regulator |
| CN102906657A (en) * | 2010-02-23 | 2013-01-30 | Omvl股份公司 | Compensated pressure reducting device |
| CN107091369A (en) * | 2017-05-10 | 2017-08-25 | 宁波兴茂电子科技有限公司 | A kind of pilot valve discharge characteristic test device and its application method |
| CN107620819A (en) * | 2017-11-13 | 2018-01-23 | 佛山市恒爱网络科技有限公司 | A kind of filtering type holding valve |
| RU2770306C1 (en) * | 2021-03-15 | 2022-04-15 | Степан Валентинович Суворов | Gas pressure reducer |
-
1993
- 1993-10-26 CN CN 93242630 patent/CN2172825Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102498323A (en) * | 2009-05-19 | 2012-06-13 | 科瓦尔株式会社 | Pressure reducing valve |
| CN102498323B (en) * | 2009-05-19 | 2014-01-22 | 科瓦尔株式会社 | Pressure reducing valve |
| CN102473016A (en) * | 2009-07-10 | 2012-05-23 | 阿尔诺·德雷克塞尔 | Flow-through pressure regulator device for irrigation plants |
| CN102906657A (en) * | 2010-02-23 | 2013-01-30 | Omvl股份公司 | Compensated pressure reducting device |
| CN102541096A (en) * | 2010-11-10 | 2012-07-04 | 奥文特罗普有限责任两合公司 | Flow regulator |
| CN102541096B (en) * | 2010-11-10 | 2015-12-02 | 奥文特罗普有限责任两合公司 | Flow regulator |
| CN102434695A (en) * | 2011-09-09 | 2012-05-02 | 西麦克阀门制造有限公司 | Angle-type and direct-acting pressure reducing valve |
| CN107091369A (en) * | 2017-05-10 | 2017-08-25 | 宁波兴茂电子科技有限公司 | A kind of pilot valve discharge characteristic test device and its application method |
| CN107091369B (en) * | 2017-05-10 | 2023-06-30 | 宁波兴茂电子科技有限公司 | Pilot valve flow characteristic testing device and application method thereof |
| CN107620819A (en) * | 2017-11-13 | 2018-01-23 | 佛山市恒爱网络科技有限公司 | A kind of filtering type holding valve |
| RU2770306C1 (en) * | 2021-03-15 | 2022-04-15 | Степан Валентинович Суворов | Gas pressure reducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |