CN102359628B - Minimum flow protection valve - Google Patents
Minimum flow protection valve Download PDFInfo
- Publication number
- CN102359628B CN102359628B CN2011103396007A CN201110339600A CN102359628B CN 102359628 B CN102359628 B CN 102359628B CN 2011103396007 A CN2011103396007 A CN 2011103396007A CN 201110339600 A CN201110339600 A CN 201110339600A CN 102359628 B CN102359628 B CN 102359628B
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- China
- Prior art keywords
- hole
- valve
- flap
- blind hole
- sealing ring
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- Expired - Fee Related
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Abstract
The invention discloses a minimum flow protection valve. The valve comprises an upper valve body, a lower valve body, a valve sleeve and a valve flap, wherein the lower part of the valve flap is provided with a guide rod; the upper surface of the valve flap is provided with a blind hole; the bottom of the valve sleeve is provided with a blind hole; the blind hole on the valve flap is in clearance fit with the external diameter of the lower part of the valve sleeve; springs are arranged in the blind holes of the valve sleeve and the valve flap; a bearing rib is arranged in the lower valve body; the middle part of the bearing rib is provided with a through hole; the side wall of the through hole is provided with a channel communicated with a bypass pipe; a bushing is arranged in the through hole on the middle part of the bearing rib and provided with an overflow hole corresponding to the channel of the through hole of the bearing rib; an upper sealing ring and a lower sealing ring are arranged in the bushing; the guide rod is in tight fit with the upper sealing ring and the lower sealing ring and can vertically slide; the bottom of the guide rod is provided with an axial blind hole; and a radial through hole corresponding to the overflow hole is formed corresponding to the axial blind hole. The valve is dual-purpose and can be used as the minimum flow protection valve and a check valve in a pipeline, the problem that a main sealing piece and an overflow control piece frequently vibrate is solved, and the service life of the valve is prolonged.
Description
Technical field
The present invention relates to a kind of valve, relate in particular to a kind of minimum discharge Protective valve.
Background technique
In oil, chemical industry, boiler feed water or other system; For the output flow that keeps pump is not less than the minimum discharge of pump and system, make that system is stable not to be damaged with pump, thus design and a kind of special valve of producing; And the flap of more existing minimum discharge valves usually receives the impact of medium; Working life is shorter, and wayward to minimum discharge, causes unnecessary waste.
Summary of the invention
To above-mentioned existing technology, the technical problem that the present invention will solve provides a kind of automatic perceived flux of ability in service in system, guarantees the minimum discharge Protective valve that pump and system's minimum discharge require.
In order to solve the problems of the technologies described above, the present invention adopts following technological scheme: a kind of minimum discharge Protective valve comprises upper valve body, following valve body, valve pocket, flap; The flap bottom is provided with guide rod, is provided with blind hole at the upper surface of flap, and the valve pocket bottom also is provided with blind hole; Blind hole on the flap and valve pocket lower outer diameter Spielpassung; In the blind hole of valve pocket and flap, be provided with spring, spring one end contacts with flap blind hole bottom, and the other end contacts with valve pocket blind hole bottom;
Be provided with bearing rib in the valve body down; The bearing rib middle part is provided with through hole, and through-hole side wall is provided with the passage that is communicated with by-pass pipe, in the through hole at bearing rib middle part, is provided with lining; Lining is provided with and through-hole passage corresponding flooding hole, bearing rib middle part; Be respectively equipped with upper sealing ring and lower sealing ring near upper-end surface and lower end surface in the lining, flap bottom guide rod and upper sealing ring and lower sealing ring closely cooperate and can slide up and down, and are provided with axial blind hole in the guide rod bottom; The corresponding radial direction through hole that is provided with axial blind hole, radial direction through hole is corresponding with the overflow hole of lining.
Further, the sidewall of said valve pocket is provided with the damping hole that is connected with valve pocket bottom blind hole.
Further, said valve pocket is provided with spring-loaded governor.
Further, said lining top through and wire ring be connected with bearing rib.
Further, be provided with restricting orifice in the said by-pass pipe.
Further, built-up welding has stainless steel or cemented carbide on the said flap
Further, said upper sealing ring and lower sealing ring are processed by Expanded graphite or polytetrafluoroethylene material.
Further, said lining is processed by shaped steel fine finishing.
Compared with prior art, the present invention has following beneficial effect:
1. the hole of valve pocket bottom and flap cooperate; Be provided with spring between flap and the valve pocket, can assist flap when medium back flow, to reset, prevent medium back flow; Solve flap in use because the minor fluctuations of pressure and flow causes constantly sliding up and down of flap, increase the working life of valve.
2. on valve pocket, be provided with damping hole, guarantee flap under the trace variation of pressure medium and flow, it is too frequent can not slide, and causes the excessive wear at its sealing position and loses efficacy the working life of increase valve.
3. the spring regulating lever that is provided with on the valve pocket is adjusted with the elastic force to spring, to reach the purpose of adjustment valve opening power.
4. on the guide rod of flap bottom; Be provided with opening in the axial direction, also be provided with opening diametrically, when valve descends in off position; The medium of centrifugal pump output can flow in the bypass of valve through the axial and radial hole on the guide rod of flap bottom, guarantees the minimum discharge of pump.And when flap is opened, valve can be automatic the perceived flux size, when main valve flow during, have the part medium can be bypassed to system less than the minimum discharge of pump; When main valve flow during more than or equal to the minimum discharge of pump, the radial hole of flap below guide rod can be closed automatically, avoids the unnecessary overflow of medium and causes waste.
5. a valve is dual-purpose, both in pipeline, has made the minimum discharge Protective valve and also can make safety check.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Embodiment
To combine accompanying drawing and embodiment that the present invention is done further description below.
Referring to Fig. 1, a kind of minimum discharge Protective valve comprises valve body 10, upper valve body 1, valve pocket 3, flap 5, lining 8, upper sealing ring 6, lower sealing ring 9, restricting orifice 11, spring 4 and wire ring 7 down; Flap 5 bottoms are provided with guide rod; Upper surface at flap 5 is provided with blind hole; Valve pocket 3 bottoms also are provided with blind hole, and blind hole on the flap 5 and valve pocket 3 lower outer diameter Spielpassung are provided with spring 4 in the blind hole of valve pocket 3 and flap 5; Spring 4 one ends contact with flap 3 blind holes bottom, and the other end contacts with valve pocket 3 blind holes bottom; The sidewall of said valve pocket 3 is provided with the damping hole that is connected with valve pocket 3 bottom blind holes, and valve pocket 3 is provided with spring-loaded governor 2.
Be provided with bearing rib in the valve body 10 down; The bearing rib middle part is provided with through hole, and through-hole side wall is provided with the passage that is communicated with by-pass pipe, in the through hole at bearing rib middle part, is provided with lining 8; Lining 8 is provided with and through-hole passage corresponding flooding hole, bearing rib middle part; Be respectively equipped with upper sealing ring 6 and lower sealing ring 9 near upper-end surface and lower end surface in the lining 8, flap 5 bottom guide rods and upper sealing ring 6 closely cooperate with lower sealing ring 9 and can slide up and down, and are provided with axial blind hole in the guide rod bottom; The corresponding radial direction through hole that is provided with axial blind hole, radial direction through hole is corresponding with the overflow hole of lining 8.
Guide rod and upper sealing ring 6, lower sealing ring 9 can be realized radial seal, and flap 5 is equipped with fully hard sealing surface with following valve body 10, and restricting orifice 11 adopts with following valve body 10 and is threaded, and lining 8 adopts and wire ring is fixed on down on the valve body 10.
As preferably, following valve body 10 adopts casting to form, and lining 8 is to be formed by shaped steel fine finishing; Flap 5 is to cast again by shaped steel that fine finishing forms, and upper sealing ring 6, lower sealing ring 9 are that compacting or fine finishing form, and wire ring 7 is to be formed by shaped steel fine finishing; Flap 5 bottom guide rod external diameters and upper sealing ring 6, lower sealing ring 9 internal diameters are drive fit; Can realize radial seal, and can produce slide relative, lining 8 be by and wire ring 7 be fastened on down on the valve body 10.
Upper valve body 1 adopts casting to form, and valve pocket 3 adopts casting to form, and built-up welding has stainless steel or cemented carbide on the flap 5, and spring 4 is formed by the steel wire coiling; Spring-loaded governor 2 mainly is made up of spring regulating lever and pressing plate, and pressing plate is positioned at the top valve pocket 3 blind hole inner bottom surfaces of spring 4, and the spring connecting rod passes with pressing plate from valve pocket 3 tops and is connected; Whole spring-loaded governor 2 is processed by shaped steel, when below medium acts on flap 5, produces a reasoning that makes progress; Flap 5 moves upward, and flap 5 sealing surfaces leave down valve body 10 sealing surfaces, valve opening; Medium is through main valve, and flap 5 moves upward to drive on the guide rod of bottom and moves, and dwindles the overflow hole on the bar and closes overflow hole.Otherwise medium back flow, flap 5 glides assisting of spring 4, and up to closing main valve, flap 5 increases overflow hole and complete opening flow-off when gliding, by-path turn-on, the minimum discharge of assurance system.
Claims (8)
1. minimum discharge Protective valve; Comprise upper valve body (1), following valve body (10), valve pocket (3), flap (5); It is characterized in that: flap (5) bottom is provided with guide rod, is provided with blind hole at the upper surface of flap (5), and valve pocket (3) bottom also is provided with blind hole; Blind hole on the flap (5) and valve pocket (3) lower outer diameter Spielpassung; In the blind hole of valve pocket (3) and flap (5), be provided with spring (4), spring (4) one ends contact with flap (5) blind hole bottom, and the other end contacts with valve pocket (3) blind hole bottom;
Be provided with bearing rib in the valve body (10) down; The bearing rib middle part is provided with through hole, and through-hole side wall is provided with the passage that is communicated with by-pass pipe, in the through hole at bearing rib middle part, is provided with lining (8); Lining (8) is provided with and through-hole passage corresponding flooding hole, bearing rib middle part; Be respectively equipped with upper sealing ring (6) and lower sealing ring (9) near upper-end surface and lower end surface in the lining (8), flap (5) bottom guide rod and upper sealing ring (6) and lower sealing ring (9) closely cooperate and can slide up and down, and are provided with axial blind hole in the guide rod bottom; The corresponding radial direction through hole that is provided with axial blind hole on guide rod, radial direction through hole is corresponding with the overflow hole of lining (8).
2. minimum discharge Protective valve according to claim 1 is characterized in that: the sidewall of said valve pocket (3) is provided with the damping hole that is connected with valve pocket (3) bottom blind hole.
3. minimum discharge Protective valve according to claim 1 and 2 is characterized in that: said valve pocket (3) is provided with spring-loaded governor (2).
4. minimum discharge Protective valve according to claim 3 is characterized in that: said lining (8) top is passed through and wire ring (7) is connected with bearing rib.
5. minimum discharge Protective valve according to claim 3 is characterized in that: be provided with restricting orifice (11) in the said by-pass pipe.
6. minimum discharge Protective valve according to claim 3 is characterized in that: said flap (5) is gone up built-up welding has stainless steel or cemented carbide.
7. minimum discharge Protective valve according to claim 3 is characterized in that: said upper sealing ring (6) and lower sealing ring (9) are processed by Expanded graphite or polytetrafluoroethylene material.
8. minimum discharge Protective valve according to claim 3 is characterized in that: said lining (8) is processed by shaped steel fine finishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103396007A CN102359628B (en) | 2011-11-01 | 2011-11-01 | Minimum flow protection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103396007A CN102359628B (en) | 2011-11-01 | 2011-11-01 | Minimum flow protection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102359628A CN102359628A (en) | 2012-02-22 |
| CN102359628B true CN102359628B (en) | 2012-11-21 |
Family
ID=45584994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103396007A Expired - Fee Related CN102359628B (en) | 2011-11-01 | 2011-11-01 | Minimum flow protection valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102359628B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489792A (en) * | 2017-08-11 | 2017-12-19 | 江苏金石机械集团有限公司 | Sealing device for high pressure anti-sticking ball-and-seat |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2366628Y (en) * | 1999-03-09 | 2000-03-01 | 查恩玉 | Double sealing cushion check valve |
| DE10058719A1 (en) * | 2000-11-25 | 2002-06-13 | Wtz Feikeramischen Ind | Valve for injecting fuel into combustion chamber of internal combustion engine comprises valve body and holder containing valve positioning member |
| CN2869501Y (en) * | 2005-12-29 | 2007-02-14 | 王原昕 | Overflow non-return valve |
| CN201354779Y (en) * | 2009-02-26 | 2009-12-02 | 南京工业职业技术学院 | Hydraulic balanced valve |
-
2011
- 2011-11-01 CN CN2011103396007A patent/CN102359628B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2366628Y (en) * | 1999-03-09 | 2000-03-01 | 查恩玉 | Double sealing cushion check valve |
| DE10058719A1 (en) * | 2000-11-25 | 2002-06-13 | Wtz Feikeramischen Ind | Valve for injecting fuel into combustion chamber of internal combustion engine comprises valve body and holder containing valve positioning member |
| CN2869501Y (en) * | 2005-12-29 | 2007-02-14 | 王原昕 | Overflow non-return valve |
| CN201354779Y (en) * | 2009-02-26 | 2009-12-02 | 南京工业职业技术学院 | Hydraulic balanced valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102359628A (en) | 2012-02-22 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20201101 |