CN202469120U - Pressure-feedback pressure reducing valve - Google Patents
Pressure-feedback pressure reducing valve Download PDFInfo
- Publication number
- CN202469120U CN202469120U CN2012201160837U CN201220116083U CN202469120U CN 202469120 U CN202469120 U CN 202469120U CN 2012201160837 U CN2012201160837 U CN 2012201160837U CN 201220116083 U CN201220116083 U CN 201220116083U CN 202469120 U CN202469120 U CN 202469120U
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- Prior art keywords
- valve
- pressure
- diaphragm
- hole
- feedback
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- Expired - Fee Related
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Abstract
The utility model discloses a pressure-feedback pressure reducing valve which comprises components such as a valve body, a valve cover component, an upper cover, a membrane, a membrane pressing plate, a valve rod, a valve disc, an adjusting nut, a piston and a pressure adjusting spring, wherein the interior of the valve body is provided with an upper cavity, a lower cavity and an intercept valve hole which communicates the upper cavity with the lower cavity; the upper cavity serves as a medium outlet and the lower cavity serves as a medium inlet; the valve body is provided with a downstream feedback pressure outlet communicated with the upper cavity; the upper cover is provided with a downstream feedback pressure inlet; the downstream feedback pressure outlet is communicated with the downstream feedback pressure inlet trough a downstream feedback pressure pipe; a check valve is serially connected to the downstream feedback pressure pipe; and the valve disc covers the intercept valve hole from the lower side and used for controlling the opening and closing of the intercept valve hole as well as the opening degree of the intercept valve hole. According to the pressure-feedback pressure reducing valve, the effective area of upstream pressure acting on the intercept valve hole is reduced, and the opening degree of the intercept valve hole is regulated on the basis of the downstream pressure, so that the influence of the upstream pressure on the downstream pressure is less, and the stability of the pressure-feedback pressure reducing valve is enhanced.
Description
Technical field
The utility model relates to the reduction valve that a kind of Applicable media is air, steam, lubricating oil, fresh water, particularly a kind of pressure feedback reduction valve.
Background technique
The existing reduction valve of China is spring diaphragm chip structure at present; Its structural feature is: the mouth that dams is tabular flap seal form; Turnover medium mode is that epicoele is that medium import cavity of resorption is a media outlet, and the reduction valve of this structure has a lot of outstanding shortcomings, one of which.The Sealing valve plate is a plane shape, and area of contact is big, and directly receives the effect of upstream pressure.Thereby the pressure behind the valve influences by it with regard to corresponding, makes its instability; Its two, influence because of receiving 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 not all consistent, appearance of a valve is brought 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 the dumbbell that a volumes is big, weight is big.Like the reduction valve of DN100 type, weight reaches more than 125 kilograms, and big like this weight and volume has brought inconvenience for installation and maintenance, even can't install in some occasion at all; Its four, the pressure adjusting spring of existing pressurizing valve is installed in the valve body, need open valve body during maintenance, and is very inconvenient.
The model utility content
The utility model technical problem to be solved is to the existing the problems referred to above of reduction valve a kind of pressure feedback reduction valve to be provided; This pressure feedback pressurizing valve has been broken the conventional structure pattern of domestic existing self-contained pressure regulator, and pressure relief ranges is wide, the advantage of features simple structure.
The utility model technical problem to be solved can realize through following technological scheme:
The pressure feedback reduction valve comprises:
One valve body; Said valve inner has an epicoele and a cavity of resorption and in order to be communicated with the valve opening that dams of said epicoele and cavity of resorption; Said valve body is provided with valve cover hole and the drain hole that lays respectively at valve cover hole one side; Said valve cover hole drain hole communicates with said epicoele, on said drain hole, is connected with the drainage plug screw;
One is installed in the valve gap parts on the said valve cover hole through fastening piece and filler seat; Said valve gap parts be divided into the bottom valve gap and top the diaphragm seat and in order to be connected the supporting part of valve gap and diaphragm seat; Be provided with an adjusting nut mountion plate in the neutral position of said supporting part, be rotary with an adjusting nut on the said adjusting nut mountion plate; Offer the piston hole of a up/down perforation at the center of said diaphragm seat, place a piston in the piston hole;
One is installed in the loam cake on the said diaphragm seat through fastening piece, and said loam cake and said diaphragm seat define a pressure regulating cavity jointly;
One is pressed in the diaphragm on the diaphragm seat through said loam cake, and said diaphragm is divided into upper and lower pressure regulating cavity with said pressure regulating cavity;
One is positioned at said upward pressure regulating cavity and is pressed in the diaphragm pressing plate on the said diaphragm;
Pass the valve rod of said adjusting nut in the middle of one, the lower end of said valve rod connects a valve disc after passing valve gap successively, and the upper end of said valve rod is connected with said diaphragm pressing plate after passing said piston and diaphragm successively;
Be enclosed within pressure adjusting spring and spring pad on the said valve rod, said spring pad is positioned at the top of said look nut and contacts said adjusting nut; The upper and lower end face of spring contacts with spring pad with said piston respectively; It is characterized in that,
Offer on the said valve body one be positioned at the valve of valve cover hole opposite side after the feedback pressure outlet, the feedback pressure outlet is communicated with said epicoele behind the said valve; Last cover offer a valve after the feedback pressure import; Is communicated with through feedback pressure pipe behind the valve between the feedback pressure import behind feedback pressure outlet and the valve behind the said valve, feeds back to manage in said downstream pressure and be connected in series a stop valve; Epicoele in the said valve body is a media outlet, and cavity of resorption is the medium import, said valve disc by down and lower cover on the said valve port that dams, in order to the open and close of controlling the said valve opening that dams and open size.
Offer an axial stuffing hole at the center of said valve gap, in said stuffing hole, be placed with the flexible graphite packing tube through the filler gland nut; The lower end of said valve rod is connected valve disc after passing said filler gland nut and flexible graphite packing tube.
The supporting part of said valve gap parts is a unenclosed construction.
Owing to adopted technological scheme as above, make upstream pressure act on to dam the useful area of valve opening to diminish, and the size of the valve opening open degree of damming relies on downstream pressure to regulate, thereby downstream pressure influenced by upstream pressure little, improved its stability.Make the valve of same bore have the advantage of Flow characteristics high conformity simultaneously, pressure relief ranges enlarges.Because it is the supporting part of valve gap parts is a unenclosed construction, easy to maintenance when pressure adjusting spring damages in addition.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the side view of Fig. 1.
Embodiment
Further describe the utility model below in conjunction with accompanying drawing and embodiment.
Referring to Fig. 1 and Fig. 2; Pressure feedback reduction valve shown in the figure comprises a valve body 100, and these valve body 100 inside have an epicoele 110 and a cavity of resorption 120; Epicoele 110 is as media outlet; Cavity of resorption 120 is as the medium import, in valve body 100, also has the valve opening 130 that dams, and the valve opening 130 that dams is communicated with epicoeles 110 and cavity of resorptions 120.Medium in the cavity of resorption 120 flows in the epicoele 120 through the valve opening 130 that dams.
Valve body 100 is provided with feedback pressure outlet 150 behind valve cover hole 140 and the valve that lays respectively at valve cover hole 140 both sides, drain hole 160, and feedback pressure outlet 150 and drain hole 160 communicate with epicoele 110 behind valve cover hole 140, the valve; On drain hole 160, be rotary with drainage plug screw 170.
This pressure feedback reduction valve also comprises valve gap parts 200; These valve gap parts 200 be divided into the bottom valve gap 210 and top diaphragm seat 220 and in order to be connected the supporting part 230 of valve gap 210 and diaphragm seat 220; Valve gap 210 is installed on the valve body 100 through stud bolt 211 and nut 212; Valve gap 210 covers valve cover hole 140, between valve gap 210 and valve body 100, is provided with filler seat 310.In addition for sealing better, offer an axial stuffing hole 213 at the center of valve gap 210, be placed with flexible graphite packing tube 330 through filler gland nut 320 in the stuffing hole 213.Supporting part 230 is a unenclosed construction.
Offer the piston hole 221 of a up/down perforation at the center of diaphragm seat 220, place a piston 340 in the piston hole 221, the center of piston 340 offers the valve rod hole 341 of up/down perforation.Be provided with a look nut mountion plate 240 in the neutral position of supporting part 230, offer an axial screw thread hole 241 on the nut mountion plate 240, be rotary with a look nut 350 in the axial screw thread hole 241.
The loam cake 360 of this pressure feedback reduction valve is installed on the diaphragm seat 220 through stud bolt 361 and nut 362, and loam cake 360 defines a pressure regulating cavity jointly with diaphragm seat 220; Offer feedback pressure import 363 behind the valve on the loam cake 360.
The diaphragm 370 of this pressure feedback reduction valve is pressed on the diaphragm seat 220 through loam cake 360, and the center of diaphragm 370 offers center hole 371 and this diaphragm 370 is divided into upper and lower pressure regulating cavity 381,382 with pressure regulating cavity.In last pressure regulating cavity 381, be provided with a diaphragm pressing plate 390, diaphragm pressing plate 390 is pressed on the diaphragm 370.
Look nut 350 is passed in the centre of the valve rod 400 of this pressure feedback reduction valve; Its lower end is passed filler gland nut 320 successively and is connected a valve disc 430 with flexible graphite packing tube 220 backs through gland nut 410, control pad 420; Valve disc 430 from top to bottom covers on the valve opening 130 that dams, with control dam valve opening 130 open and close and open size; Center hole 371 backs that the upper end of valve rod 400 is passed valve rod hole 341 and diaphragm 370 on the piston 340 successively are connected with diaphragm pressing plate 390 through spring washer 391, nut 392.
On valve rod 400, be with a spring pad 440 and pressure adjusting spring 450, spring pad 440 is positioned at look nut mountion plate 240 tops with pressure adjusting spring 450, and the bottom of spring pad 440 touches look nut 350.The upper and lower end face of pressure adjusting spring 450 contacts with spring pad 440 with piston 340 respectively.
The lower end of the downstream pressure of this pressure feedback reduction valve feedback pipe 500 through the valve on pipe joint 510 and the valve body 100 after feedback pressure export 150 and be connected; The upper end through the valve on pipe joint 520 and the loam cake 360 after feedback pressure import 363 be connected, on pressure feedback pipe 500, be connected in series a stop valve 530.The purpose that stop valve 530 is set is the maintenance that makes things convenient for this pressure feedback reduction valve.
The working principle of the pressure feedback reduction valve of the utility model is following: during use; Rotation look nut 350; Through pressure adjusting spring 450 and fitting piston 340, diaphragm 370; Drive valve rod 400 and valve disc 430 to control the open degree of the valve opening 130 that dams, control cavity of resorption 120 and flow into the flow of medium in the epicoeles 110, thereby reach the purpose of controlling downstream pressure.When working medium not; Be when medium does not flow out behind the valve, the pressure in the epicoele 110 increase, the pressure in the epicoele 110 by the valve on the valve body 100 after behind the valve in the feedback pressure outlet 150, downstream pressure feedback pipe 500, loam cake 360 feedback pressure import 361 feed back on the diaphragm 370; Heading on diaphragm 370 descends; And the decline of diaphragm 370, promoting piston 340, to overcome the resistance of pressure adjusting spring 450 descending, and descending piston 340 drives valve discs 430 through valve rod 400 and moves down; Up to closing the valve opening 130 that dams, reach balance.When working medium, when promptly medium flowed out behind the valve, the pressure in the epicoele 110 diminished; Feed back on the diaphragm 370 through feedback pressure import 361 behind the valve on feedback pressure outlet 150 behind the valve on the valve body 100, downstream pressure feedback pipe 500, the loam cake 360, the feedback pressure on the diaphragm 370 diminishes, and piston 340 is up in the promotion of pressure adjusting spring 450; The up of piston 340 acts on the diaphragm pressing plate 390 through diaphragm 370; It is up to promote diaphragm pressing plate 390, and it is up that diaphragm pressing plate 390 drives valve rods 400, and that valve rod 400 drives valve disc 430 is up; The valve opening 130 that dams is opened, and medium is flowed in the epicoele 110 through the valve opening 130 that dams by cavity of resorption 120.The utility model is through the acting in conjunction of look nut 350, pressure adjusting spring 450, diaphragm 370 and downstream pressure; Regulate pressure relief ranges; It is wide to have pressure relief ranges, the high advantage of the decompression precision of voltage regulation, and pressure relief ranges is 0.2-0.7MPa when the medium inlet pressure is 0.8MPa.
Claims (3)
1. pressure feedback reduction valve comprises:
One valve body; Said valve inner has an epicoele and a cavity of resorption and in order to be communicated with the valve opening that dams of said epicoele and cavity of resorption; Said valve body is provided with valve cover hole and the drain hole that lays respectively at valve cover hole one side; Said valve cover hole drain hole communicates with said epicoele, on said drain hole, is connected with the drainage plug screw;
One is installed in the valve gap parts on the said valve cover hole through fastening piece and filler seat; Said valve gap parts be divided into the bottom valve gap and top the diaphragm seat and in order to be connected the supporting part of valve gap and diaphragm seat; Be provided with an adjusting nut mountion plate in the neutral position of said supporting part, be rotary with an adjusting nut on the said adjusting nut mountion plate; Offer the piston hole of a up/down perforation at the center of said diaphragm seat, place a piston in the piston hole;
One is installed in the loam cake on the said diaphragm seat through fastening piece, and said loam cake and said diaphragm seat define a pressure regulating cavity jointly;
One is pressed in the diaphragm on the diaphragm seat through said loam cake, and said diaphragm is divided into upper and lower pressure regulating cavity with said pressure regulating cavity;
One is positioned at said upward pressure regulating cavity and is pressed in the diaphragm pressing plate on the said diaphragm;
Pass the valve rod of said adjusting nut in the middle of one, the lower end of said valve rod connects a valve disc after passing valve gap successively, and the upper end of said valve rod is connected with said diaphragm pressing plate after passing said piston and diaphragm successively;
Be enclosed within pressure adjusting spring and spring pad on the said valve rod, said spring pad is positioned at the top of said look nut and contacts said adjusting nut; The upper and lower end face of spring contacts with spring pad with said piston respectively; It is characterized in that,
Offer on the said valve body one be positioned at the valve of valve cover hole opposite side after the feedback pressure outlet, the feedback pressure outlet is communicated with said epicoele behind the said valve; Last cover offer a valve after the feedback pressure import; Is communicated with through feedback pressure pipe behind the valve between the feedback pressure import behind feedback pressure outlet and the valve behind the said valve, feeds back to manage in said downstream pressure and be connected in series a stop valve; Epicoele in the said valve body is a media outlet, and cavity of resorption is the medium import, said valve disc by down and lower cover on the said valve port that dams, in order to the open and close of controlling the said valve opening that dams and open size.
2. pressure feedback reduction valve as claimed in claim 1 is characterized in that, offers an axial stuffing hole at the center of said valve gap, in said stuffing hole, is placed with the flexible graphite packing tube through the filler gland nut; The lower end of said valve rod is connected valve disc after passing said filler gland nut and flexible graphite packing tube.
3. pressure feedback reduction valve as claimed in claim 1 is characterized in that, the supporting part of said valve gap parts is a unenclosed construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201160837U CN202469120U (en) | 2012-03-23 | 2012-03-23 | Pressure-feedback pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201160837U CN202469120U (en) | 2012-03-23 | 2012-03-23 | Pressure-feedback pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202469120U true CN202469120U (en) | 2012-10-03 |
Family
ID=46917279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201160837U Expired - Fee Related CN202469120U (en) | 2012-03-23 | 2012-03-23 | Pressure-feedback pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202469120U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016835A (en) * | 2012-12-08 | 2013-04-03 | 中国航天科技集团公司第六研究院第十一研究所 | Forward low-friction unloading gear for reducing valve and reducing valve |
-
2012
- 2012-03-23 CN CN2012201160837U patent/CN202469120U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016835A (en) * | 2012-12-08 | 2013-04-03 | 中国航天科技集团公司第六研究院第十一研究所 | Forward low-friction unloading gear for reducing valve and reducing valve |
| CN103016835B (en) * | 2012-12-08 | 2014-10-22 | 中国航天科技集团公司第六研究院第十一研究所 | Forward low-friction unloading gear for reducing valve and reducing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20170323 |
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| CF01 | Termination of patent right due to non-payment of annual fee |