CN104180033A - Piston balanced type pressure releasing valve - Google Patents
Piston balanced type pressure releasing valve Download PDFInfo
- Publication number
- CN104180033A CN104180033A CN201410381452.9A CN201410381452A CN104180033A CN 104180033 A CN104180033 A CN 104180033A CN 201410381452 A CN201410381452 A CN 201410381452A CN 104180033 A CN104180033 A CN 104180033A
- Authority
- CN
- China
- Prior art keywords
- guide sleeve
- valve
- valve seat
- flap
- pressure relief
- 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.)
- Pending
Links
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
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/52—Means for additional adjustment of the rate of flow
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to the field of valves, and in particular to a piston balanced type pressure releasing valve. The piston balanced type pressure releasing valve comprises a valve body, a valve seat and a valve rod; the piston balanced type pressure releasing valve is characterized in that a guide sleeve is arranged in the valve body; a pressure relief hole communicating a lower opening and a side opening is formed in the guide sleeve; a bounce-back plate matched with the guide sleeve is arranged in the guide sleeve; the valve rod penetrates through the center of the guide sleeve, and is propped against the upper end of the bounce-back plate; a cylindrical cavity connected with a cylindrical valve clack in a matched manner is formed in the lower end of the bounce-back plate; the valve seat penetrates through the center of the guide sleeve, and is propped at the bottom of the valve clack; a sealing surface sealed with the bottom of the valve clack in a matched manner is arranged at the top of the valve seat; a first O-shaped ring sealed with the sealing surface in a matched manner is arranged on the cavity; the diameter of the sealing surface, the inner diameter of the first O-shaped ring and the diameter of the valve clack are equal to enable the back pressure area of the upper surface and the lower surface of the valve clack to be equal. Stability of set-pressure is ensured; medium are ensured to be free from leakage.
Description
Technical field
The present invention relates to valve field, specifically a kind of piston balanced pressure relief valve.
Background technique
Piston balanced pressure relief valve provides overpressure protection in oil refinery, petrochemical plant, auxiliary system of power station and paper pulp and paper mill, in low-pressure fluid application.
, there are many deficiencys in the pressure relief valve of common use in currently available technology, such as when additional variation back pressure surpasses 10% Set pressure with discharge back pressure, has influence on the Set pressure of valve, causes its bad stability; And existing pressure relief valve also exists not corrosion-resistantly, easily there is the defects such as seepage.
Summary of the invention
In view of the above problems, proposed the present invention, the present invention proposes a kind of reasonable in design and effectively improve the piston balanced pressure relief valve of above-mentioned defect.
To achieve these goals, the technical solution used in the present invention is: a kind of piston balanced pressure relief valve, comprise valve body, valve seat, valve rod, and described valve body comprises upper shed, under shed, side opening, described valve rod is arranged in upper open end cavity; Described valve seat is arranged under shed, it is characterized in that: in described valve body, guide sleeve is set, the pressure relief vent that is communicated with under shed and side opening is set on guide sleeve; The Disc holder being mated is set in described guide sleeve, valve rod is connected to Disc holder upper end through guide sleeve center, Disc holder lower end arranges the reentrant cylindrical cavity being connected with cylindrical flap, described valve seat is connected to flap bottom through guide sleeve center, described valve seat top arranges the sealing surface with flap bottom fitted seal, and the O shape circle with sealing surface fitted seal is set on described cavity; Described sealing surface diameter, O shape circle internal diameter and a flap equal diameters, make flap top and bottom equated by back pressure area.
By adopting technique scheme, the back pressure area that is subject to of flap top and bottom is equated, be sealing surface diameter, O shape circle internal diameter and a flap equal diameters, Superimposed back pressure and Briltup back pressure on flap are equated, the impact on Set pressure while having compensated additional variation back pressure and discharge back pressure over 10% Set pressure; The sealing surface of valve seat top setting simultaneously and flap bottom fitted seal, arranges on cavity and encloses with an O shape of sealing surface fitted seal, and double seal protection, guarantees medium ne-leakage.
The present invention is further set to: described Disc holder guiding place arranges the 2nd O shape circle with guide sleeve fitted seal.By this setting, medium and valve body epicoele to be isolated, protection Component can not be subject to the erosion of medium, thereby guarantee the stability of equipment and increase the service life.
The present invention is further set to: described guide sleeve is arranged under shed and side opening intersection, and guide sleeve and valve interior wall are sealed and matched, and is pressed and be stuck in lower opening by valve seat.By this setting, guide sleeve and valve seat, valve body location, auxiliary Disc holder is done directed vertical motion, guarantees the stability of valve working.
The present invention is further set to: described valve seat bottom is connected lap joint flange with side opening.By this setting, when valve installation, flange rotates and swings the restriction that is not subject to pipeline location on valve seat and valve body, can be movable, in case flexible for installation, the deficiency of product fill on installing and using.
The present invention is further set to: described seal face materials is rubber.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention structural representation;
Fig. 2 is Disc holder of the present invention and the guide sleeve structure for amplifying schematic diagram that is sealed and matched;
Fig. 3 is valve seat of the present invention and the flap structure for amplifying schematic diagram that is sealed and matched.
Number in the figure implication: 1-valve body; 2-valve seat; 3-valve rod; 4-guide sleeve; 41-pressure relief vent; 5-Disc holder; 6-flap; 7-the one O shape circle; 8-sealing surface; 9-the 2nd O shape circle; 10-Adjusting bolt Adjusting screw; 11-spring; 12-lower spring cup; 13-upper spring seat; 14-cap; 15-bonnet; 16-lap joint flange.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
The present embodiment a kind of piston balanced pressure relief valve as shown in Figure 1-Figure 3, comprises valve body 1, valve seat 2, valve rod 3, and described valve body 1 comprises upper shed, under shed, side opening; Described valve rod 3 is arranged in upper open end cavity, valve rod 3 periphery covers have spring 11, these spring 11 upper ends are connected to Adjusting bolt Adjusting screw 10 bottoms that are enclosed within equally on valve rod 3 by upper spring seat 13, these spring 11 lower ends are connected on lower spring cup 12, described valve rod 3 upper end Adjusting bolt Adjusting screw 10 outsides screw the also cap 14 that is placed in valve body 1 upper shed top, in upper shed, bonnet 15 is set, also cap 14, valve rod 3 upper end portions and Adjusting bolt Adjusting screw 10 first halves are protected within it; Described valve seat 2 is arranged under shed, and valve seat 2 is threaded with under shed; The interior guide sleeve 4 that arranges of described valve body 1, arranges the pressure relief vent 41 that is communicated with under shed and side opening on guide sleeve 4; The Disc holder 5 that the described interior setting of guide sleeve 4 is mated, valve rod 3 is connected to Disc holder 5 upper ends through guide sleeve 4 centers, Disc holder 5 lower ends arrange the reentrant cylindrical cavity being connected with cylindrical flap 6, described valve seat 2 is connected to flap 6 bottoms through guide sleeve 4 centers, described valve seat 2 tops arrange the sealing surface 8 with flap 6 bottom fitted seal, and the O shape circle 7 with sealing surface 8 fitted seal is set on described cavity; Described sealing surface 8 diameters, an O shape are enclosed 7 internal diameters and flap 6 equal diameters, make flap 6 top and bottom equated by back pressure area.
By adopting technique scheme, the back pressure area that is subject to of flap 6 top and bottom is equated, be sealing surface 8 diameters, an O shape circle internal diameter 7 and flap 6 equal diameters, Superimposed back pressure and Briltup back pressure on flap 6 are equated, the impact on Set pressure while having compensated additional variation back pressure and discharge back pressure over 10% Set pressure; The sealing surface 8 of valve seat 2 tops settings simultaneously and flap 6 bottom fitted seal, arranges on cavity and encloses with an O7 shape of sealing surface 8 fitted seal, and double seal protection, guarantees medium ne-leakage.
In the present invention, flap 6 is preferably cylindrical shape, in practical application, flap 6 can be also other shapes, for example: taper type, prismatic other shapes such as grade, as long as guarantee that flap 6 top and bottom are subject to back pressure area equal, the impact on Set pressure in the time of just can compensating additional variation back pressure and discharge back pressure over 10% Set pressure.
In the present embodiment, Disc holder 5 guiding places arrange the 2nd O shape circle 9 with guide sleeve 4 fitted seal, and Disc holder 5 matches with guide sleeve 4, on Disc holder 5 outer walls, offers a circular trough, for placing the 2nd O shape circle 9.By this setting, medium and valve body epicoele to be isolated, protection Component can not be subject to the erosion of medium, thereby guarantee the stability of equipment and increase the service life.
In the present embodiment, guide sleeve 4 is arranged under shed and side opening intersection, and guide sleeve 4 and valve body 1 inner wall sealing coordinate, and are pressed and be stuck in lower opening by valve seat 2.By this setting, guide sleeve 4 and valve seat 2, valve body 1 location, auxiliary Disc holder 5 is done directed vertical motion, guarantees the stability of valve working.
In the present embodiment, valve seat 2 bottoms are connected lap joint flange 16 with side opening.By this setting, when valve installation, flange rotates and swings the restriction that is not subject to pipeline location on valve seat 2 and valve body, can be movable, in case flexible for installation, the deficiency of product fill on installing and using.
In the present embodiment, sealing surface 8 materials are rubber, sealing surface 8 and flap 6 bottom fitted seal, and sealing surface 8 also can be made for the good elastic material of other sealing effects.
The above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and modification, these of above-mentioned hypothesis improve and modification also should be considered as protection scope of the present invention.
Claims (5)
1. a piston balanced pressure relief valve, comprises valve body, valve seat, valve rod, and described valve body comprises upper shed, under shed, side opening, and described valve rod is arranged in upper open end cavity; Described valve seat is arranged under shed, it is characterized in that: in described valve body, guide sleeve is set, the pressure relief vent that is communicated with under shed and side opening is set on guide sleeve; The Disc holder being mated is set in described guide sleeve, valve rod is connected to Disc holder upper end through guide sleeve center, Disc holder lower end arranges the reentrant cylindrical cavity being connected with cylindrical flap, described valve seat is connected to flap bottom through guide sleeve center, described valve seat top arranges the sealing surface with flap bottom fitted seal, and the O shape circle with sealing surface fitted seal is set on described cavity; Described sealing surface diameter, O shape circle internal diameter and a flap equal diameters, make flap top and bottom equated by back pressure area.
2. a kind of piston balanced pressure relief valve according to claim 1, is characterized in that: described Disc holder guiding place arranges the 2nd O shape circle with guide sleeve fitted seal.
3. a kind of piston balanced pressure relief valve according to claim 1 and 2, is characterized in that: described guide sleeve is arranged under shed and side opening intersection, and guide sleeve and valve interior wall are sealed and matched, and is pressed and be stuck in lower opening by valve seat.
4. a kind of piston balanced pressure relief valve according to claim 1 and 2, is characterized in that: described valve seat bottom is connected lap joint flange with side opening.
5. a kind of piston balanced pressure relief valve according to claim 1 and 2, is characterized in that: described seal face materials is rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410381452.9A CN104180033A (en) | 2014-08-01 | 2014-08-01 | Piston balanced type pressure releasing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410381452.9A CN104180033A (en) | 2014-08-01 | 2014-08-01 | Piston balanced type pressure releasing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104180033A true CN104180033A (en) | 2014-12-03 |
Family
ID=51961280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410381452.9A Pending CN104180033A (en) | 2014-08-01 | 2014-08-01 | Piston balanced type pressure releasing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104180033A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2379671Y (en) * | 1999-06-01 | 2000-05-24 | 乐山市长江仪表厂 | Balanced type direct load safety valve |
| WO2011058706A1 (en) * | 2009-11-11 | 2011-05-19 | 日本発條株式会社 | Pressure reducing valve apparatus |
| CN102518844A (en) * | 2011-12-05 | 2012-06-27 | 北京航天动力研究所 | Anticorrosive lining safety valve |
| CN203146937U (en) * | 2013-03-19 | 2013-08-21 | 永一阀门集团有限公司 | Vacuum anti-backflow safety valve |
| CN203309242U (en) * | 2013-05-31 | 2013-11-27 | 浙江恒华阀门有限公司 | Spring full lift closed safety valve |
| CN203453513U (en) * | 2013-09-18 | 2014-02-26 | 北京星光沃特传动研究所 | Novel external balance stop valve |
| CN203500596U (en) * | 2013-07-02 | 2014-03-26 | 乐山长仪阀门制造有限公司 | Hard-and-soft sealing structure of valve flap of spring type safety valve |
| CN203585472U (en) * | 2013-05-31 | 2014-05-07 | 浙江恒华阀门有限公司 | Spring full lift safety valve with spanner |
| CN203730857U (en) * | 2014-02-18 | 2014-07-23 | 永一阀门集团有限公司 | Elastic sealing safety valve |
| CN203979542U (en) * | 2014-08-01 | 2014-12-03 | 浙江恒华阀门有限公司 | Piston balanced pressure relief valve |
-
2014
- 2014-08-01 CN CN201410381452.9A patent/CN104180033A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2379671Y (en) * | 1999-06-01 | 2000-05-24 | 乐山市长江仪表厂 | Balanced type direct load safety valve |
| WO2011058706A1 (en) * | 2009-11-11 | 2011-05-19 | 日本発條株式会社 | Pressure reducing valve apparatus |
| CN102518844A (en) * | 2011-12-05 | 2012-06-27 | 北京航天动力研究所 | Anticorrosive lining safety valve |
| CN203146937U (en) * | 2013-03-19 | 2013-08-21 | 永一阀门集团有限公司 | Vacuum anti-backflow safety valve |
| CN203309242U (en) * | 2013-05-31 | 2013-11-27 | 浙江恒华阀门有限公司 | Spring full lift closed safety valve |
| CN203585472U (en) * | 2013-05-31 | 2014-05-07 | 浙江恒华阀门有限公司 | Spring full lift safety valve with spanner |
| CN203500596U (en) * | 2013-07-02 | 2014-03-26 | 乐山长仪阀门制造有限公司 | Hard-and-soft sealing structure of valve flap of spring type safety valve |
| CN203453513U (en) * | 2013-09-18 | 2014-02-26 | 北京星光沃特传动研究所 | Novel external balance stop valve |
| CN203730857U (en) * | 2014-02-18 | 2014-07-23 | 永一阀门集团有限公司 | Elastic sealing safety valve |
| CN203979542U (en) * | 2014-08-01 | 2014-12-03 | 浙江恒华阀门有限公司 | Piston balanced pressure relief valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141203 |