CN101666388B - Pressure relief valve - Google Patents
Pressure relief valve Download PDFInfo
- Publication number
- CN101666388B CN101666388B CN2009101716499A CN200910171649A CN101666388B CN 101666388 B CN101666388 B CN 101666388B CN 2009101716499 A CN2009101716499 A CN 2009101716499A CN 200910171649 A CN200910171649 A CN 200910171649A CN 101666388 B CN101666388 B CN 101666388B
- Authority
- CN
- China
- Prior art keywords
- valve
- piston
- guide bush
- valve piston
- guide surface
- 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
Links
- 239000012530 fluid Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241000220317 Rosa Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- F16K17/08—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 with special arrangements for providing a large discharge passage
- F16K17/082—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 with special arrangements for providing a large discharge passage with piston
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a pressure relief valve comprising a valve body. The valve body is capable of axial flow guidance on at least one part of the length, and in the valve, a valve piston loaded by a spring is inserted in a piston guide, and hermetically enclosed by the piston guide. The piston guide comprises a guidance surface for guiding the fluid onto the reflection surface of the valve piston.
Description
Technical field
The present invention relates to a kind of valve, particularly a kind of be used for underground mining, according to the pressure-limit valve as described in the preamble of claim 1.This valve is open by DE 20 2,006 009 403.
Background technique
Can produce following problems in this pressure-limit valve that only has an interface usually and for example should open when cracking pressure reaches 380bar, promptly obtainable flow is too small when valve open.Particularly when valve had relatively little diameter, this problem will occur.
Summary of the invention
The objective of the invention is to, improve the pressure-limit valve of the described type of beginning like this, thereby when valve open, under the situation of little diameter, can obtain big as far as possible flow.
This purpose is by the feature of claim 1 and realization especially thus, be that piston guide bush has guide surface, this guide surface makes the fluid that the process sealing seat flows out under the situation of valve open turn to and be aligned in like this reflective surface that is provided with on the valve piston, radially lead in the axial direction, and fluid loads valve piston in the axial direction with dynamic hydrodynamic pressure.
This fluid is used to targetedly make at the guide surface that is provided with on the piston guide bush and passes the fluid that sealing seat flows and under the situation that valve piston is opened, turn in the axial direction, so that can load to valve piston with dynamic hydrodynamic pressure.By be arranged on reflective surface on the valve piston obtain a kind of interface (
), the fluid that turns to like this can hit on this interface, thereby makes under the situation of valve open, and the dynamic pressure of the fluid that flows through is used to utilize masterpiece to be used for valve piston extraly, and is enough wide and obtain needed flow so that valve piston is opened.
Of the present invention preferred embodiment in specification, in the accompanying drawing and describe in the dependent claims.
According at first preferred embodiment, guide surface can have tangent line radially in the inflow side and have axial tangent line in the outflow side, and particularly spill ground is crooked.Guide surface by such formation, the fluid stream (Fluidstrom) that flows through piston guide bush deflection and turning in this wise, thereby this fluid stream almost entirely is directed on the reflective surface of valve piston, and can fluid stream is not launched undesirably or at the radial direction upper deflecting at this.
According to another preferred embodiment preferably, valve piston is designed to cylindrical in the zone of piston guide bush, and this is because the expansion that the jet of the medium that has also prevented from thus to flow through is not expected.
Trial in practice points out that the maximum radial gap width between guide surface and valve piston is to be approximately 0.5 to 1mm, and the order of magnitude that particularly is approximately 0.7mm is preferred.Further preferably, the ring surface of the maximum between guide surface and valve piston is with approximately same big at the narrowest fluid cross-section of guide surface front.
According to another preferred embodiment, the inflow face that valve piston can have bow in the end face side, this inflow face have axial tangent line especially and have radially tangent line in the outflow side in the inflow side.Utilize this inflow face fluid stream advantageously can be directed on the guide surface of piston guide bush under the situation of valve open.At this further preferably, shaping-orientation face and reflective surface like this, thus make the fluid that flows out through valve at first redirect to direction radially and redirect to axial direction once more by piston guide bush subsequently from axial direction by valve piston.
According to another preferred embodiment, between spring and valve piston, be provided with spring seat, wherein the abutment facing of valve piston and spring seat has the shape of ball-and-socket.In this embodiment, guaranteed lowly frictionally spring seat to be pressed onto end position by two abutment facings that are shaped as ball-and-socket, on this end position, spring seat also may have the sensing of inclination.
According to another preferred embodiment, piston guide bush also can have abutment facing, and it is consistent with the ball-and-socket shape of spring seat that this abutment facing has shape and this abutment facing of ball-and-socket.Thus, when valve piston is positioned at the position of its complete closed, so also guaranteed spring seat determine against.
When each ball-and-socket had identical center, this can be favourable.
In order to use littler spring, preferably, valve piston has through hole, so that utilize fluid that the annular chamber between valve piston and the piston guide bush is loaded.
Further preferably, valve piston is not a plane earth and just utilize a circumferential edge to be pressed against on the seal ring, because in this case, circumferential edge concurs with guide surface under the situation of valve open and produces definite jet guiding, this jet guiding is as expected to the direction guiding fluid jet of reflective surface, and can not make this fluid jet become fan-shaped to scatter or decompose.
Description of drawings
Below only exemplarily by preferred embodiment and describe the present invention with reference to the accompanying drawings.Shown in the figure:
Fig. 1 shows the longitudinal section that passes the pressure-limit valve with valve piston of opening;
Fig. 2 shows the partial view of the amplification of valve among Fig. 1;
Fig. 3 shows the longitudinal section of the another kind of mode of execution that passes the pressure-limit valve with the valve piston of closing;
Fig. 4 shows the partial enlarged view of valve among Fig. 3, yet is under the situation that valve piston is opened;
Fig. 5 shows the corresponding view with Fig. 2, and it has the pressure of generation and the illustration of velocity curve; And
Fig. 6 shows the longitudinal section of the another kind of mode of execution that passes pressure-limit valve.
Embodiment
Fig. 1 shows the longitudinal section of first mode of execution that passes the pressure-limit valve with valve body, this valve body comprises two half housings of tightening mutually 10 and 12, wherein the second half housings 12 have axial through hole 14, to less diameter, and valve is axially can be through-flow on the part of its length by this through hole to this through hole from bigger reduced.
Piston guide bush 16 is tightened by screw thread 11 and the second half housings 12, is provided with in piston guide bush 16 by spring 18 valve piston 20 of effect firmly.
The valve piston 20 of magnifying show seals by O shape ring 22 in the face of piston guide bush 16 in Fig. 2, this valve piston is fastening by bail wire 19 on this piston guide bush, and this valve piston on the end of back on the flow direction, this valve piston has columniform axle journal 24, and the outer diameter of this axle journal is consistent with the narrowest locational inner diameter at piston guide bush of piston guide bush 16.See that on flow direction valve piston 20 is expanded after its axle journal 24 and formed the reflective surface 26 that annular centers on there, this reflective surface radially points to basically.Valve piston 20 is resisted against on the O shape ring 30 in the circumferential edge 28 of the back that utilizes axle journal 24 under the closed condition of valve, and this O shape environmental protection is held between half housing 12 and the piston guide bush 16.
Fig. 1 and 2 also illustrates, and then O shape ring 30, piston guide bush 16 has the through hole 32 that extends transverse to axial direction, fluid can flow out by this through hole under the situation of valve open, and this fluid flows through the gap between the narrowest position of the columniform axle journal 24 of valve piston 20 and piston guide bush 16.
Under the situation of valve open in order to guide fluid targetedly, piston guide bush 16 is seeing between O shape ring 30 and cross through hole 32 to have guide surface 34 on the flow direction, this guide surface makes the fluid that flows out through piston guide bush 16 turn to and aim at the reflective surface 26 of valve piston 20 in the axial direction under the situation of valve open.In shown embodiment, guide surface 34 spills ground is crooked and have tangent line radially in the inflow side and have axial tangent line in the outflow side.
Illustrate further as Fig. 1 and 2, be provided with spring seat 36 between spring 18 and valve piston 20, wherein the abutment facing of valve piston 20 and spring seat 36 has the shape of the ball-and-socket that has identical central respectively.In addition, piston guide bush 16 also has abutment facing 38, and the corresponding abutment facing 39 of this abutment facing and spring seat 36 is complementary.
Fig. 3 and 4 shows the another kind of mode of execution of pressure-limit valve, wherein for identical parts in other words element application identical label and these parts not being described once more.
In this embodiment's piston guide bush 16, a Component Design of piston guide bush is the inserting member 17 of annular, and wherein inserting member 17 has annular guide surface 34, and it is crooked that the cross section of this guide surface is designed to spill ground once more.Inserting member 17 is inserted in this embodiment in the piston guide bush 16 and is maintained by the second half housings 12.
In this embodiment, valve piston 20 also has the inflow face 29 of bow at it on the end of back on the flow direction, and this inflow face has axial tangent line and has radially tangent line in the outflow side in the inflow side.Thus, 14 axial direction at first radially turns to fluid from the hole under the situation of valve open, impact subsequently on the guide surface 34 and redirect to axial direction once more from radially direction by this guide surface, and next impact on the reflective surface 26 of valve piston 20, so that utilize power that this valve piston is loaded extraly.
Valve piston 20 also has through hole 40 in this embodiment, utilizes pressure that the annular chamber 42 between valve piston 20 and the piston guide bush 16 is loaded by this through hole.In addition, spring seat 36 has abutment facing 46 in this embodiment, and this abutment facing is resisted against on the end front, that be designed to axle journal of valve piston 20 and this abutment facing has the shape of ball-and-socket.Valve piston 20 has the corresponding consistent abutment facing 44 that is shaped as the ball-and-socket that has identical central equally in this zone.At last, piston guide bush 16 has another abutment facing 48 in the zone of spring seat, and this abutment facing equally also has the shape of the ball-and-socket that has identical central.
Fig. 5 has illustrated the liquidity ratio that exists in the mode of execution according to Fig. 2.As can knowing, when the endoporus 16 of the second half housings 12 was reduced to littler diameter, flowing velocity at first rose, and wherein pressure correspondingly reduces simultaneously.Under the situation of valve open, the pressure in the zone of guide surface 34 significantly reduces, and this is because flowing velocity significantly rises based on the fluid section that reduces between axle journal 24 and guide surface 34.
Fig. 6 shows the another kind of mode of execution of pressure-limit valve, and wherein identical with the mode of execution of describing before here parts have identical label and do not explain detailedly.
Valve design shown in Figure 6 is the pressure-limit valve of two-stage connection and has the 3rd housing parts 62 between first housing parts 10 and second housing parts 12, in the 3rd housing parts, be provided with piston valve 64, the power that this piston valve overcomes another spring 66 be movably and this piston valve be pressed against on the O shape ring 68 that remains between second housing parts 12 and the 3rd housing parts 62.Piston valve has center hole 70, and this center hole has throttle point 72. Label 74 and 76 is represented seal ring respectively.Label 78 expression surge volumes, itself and buffer gap 80 concur.Label 34 expression buffer bush, itself and piston valve 64 concur.Label 82 expression retaining rings.Label 84 another splash protective gears of expression.
In valve shown in Figure 6, the zone of valve piston 20 is to design as identical mode in above-mentioned designed pressure-limit valve.Housing parts 62 has been moulded piston guide bush by piston valve 64 and has been looked and then that seal ring 68 has guide surface 86 once more on flow direction, this guide surface spill ground reflective surface 88 that radially leads crooked and this guide surface and piston valve 64 concurs.Therefore, realized inventive concept twice in this embodiment.
When pressure existing in pressure-limit valve shown in Figure 6 reaches maximum value, open valve piston 20 at first to a certain extent, thereby pressure in the inside of piston valve 64 is reduced and above Rectifier plate 72, produce pressure difference, thereby and then piston valve 64 moves on flow direction and pressure fluid is discharged in the zone of guide surface 86.Pressure fluid is by 86 guiding of this guide surface, thereby makes this pressure fluid impact on the reflective surface 88 of piston valve 64 and this piston valve is moved on flow direction, so that obtain big A/F.
Claims (9)
1. a valve has valve body (10,12), described valve body on the part of its length is at least axially can be through-flow, and in described valve, by the valve piston (20 of spring (18) loading, 64) be inserted in the piston guide bush (16) and and be sealed shut described piston guide bush
It is characterized in that, described piston guide bush (16,62) has guide surface (34,86), described guide surface makes under the situation of valve open through described piston guide bush (16,62) fluid of Liu Chuing turns in the axial direction and is aligned in like this and is provided with on the described valve piston, the reflective surface of Zhi Xianging (26) radially, so that described fluid with dynamic hydrodynamic pressure in the axial direction to described valve piston (20,64) load, wherein, described guide surface (34,86) has tangent line radially and has axial tangent line in the outflow side in the inflow side, and is that spill ground is crooked.
2. valve according to claim 1 is characterized in that, described valve piston (20) is designed to columniform axle journal (24) in the zone of the narrowest position of described piston guide bush (16).
3. valve according to claim 1 is characterized in that, the ring surface of the maximum between described guide surface (34,86) and described valve piston (20,24,64) is with approximately same big at the narrowest fluid cross-section of described guide surface (34,86) front.
4. valve according to claim 1 is characterized in that, the inflow face (29) that described valve piston (20,64) has bow in the end face side, described inflow face have axial tangent line especially and have radially tangent line in the outflow side in the inflow side.
5. valve according to claim 1, it is characterized in that, described guide surface (34,86) and like this design of described reflective surface (26), thereby make the described fluid that flows out through described valve by described valve piston (20,64) redirect to axial direction once more from axial directional steering to radially direction and by described guide surface (34,86).
6. valve according to claim 1 is characterized in that, is provided with spring seat (36) between described spring (18) and described valve piston (20), and the abutment facing of wherein said valve piston (20) and described spring seat (36) has the shape of ball-and-socket.
7. valve according to claim 6 is characterized in that, described piston guide bush (16) and described spring seat (36) have abutment facing (48,46) respectively, and described abutment facing has the shape of described ball-and-socket.
8. valve according to claim 1 is characterized in that, described valve piston has through hole (40), so that utilize fluid that the annular chamber (42) between described valve piston and the described piston guide bush is loaded.
9. valve according to claim 1 is characterized in that, described valve piston (20,64) only utilizes a circumferential edge (28) to press seal ring (30).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008045419A DE102008045419A1 (en) | 2008-09-02 | 2008-09-02 | Valve i.e. pressure relief valve, for deep mining, has piston guide comprising conducting surface erecting impact surface of piston, such that fluid leaking-out of piston guide subjects piston with dynamic fluid pressure in axial direction |
| DE102008045419.2 | 2008-09-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101666388A CN101666388A (en) | 2010-03-10 |
| CN101666388B true CN101666388B (en) | 2011-05-04 |
Family
ID=41606129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101716499A Expired - Fee Related CN101666388B (en) | 2008-09-02 | 2009-09-01 | Pressure relief valve |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN101666388B (en) |
| DE (1) | DE102008045419A1 (en) |
| PL (1) | PL212440B1 (en) |
| RU (1) | RU2415324C1 (en) |
| UA (1) | UA97514C2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ306635B6 (en) * | 2012-07-24 | 2017-04-12 | Hennlich Idustrietechnik, Spol. S R. O. | A safety valve for protecting hydraulic units |
| DE102015208780A1 (en) * | 2015-05-12 | 2016-11-17 | Robert Bosch Gmbh | Pressure relief valve |
| CZ306746B6 (en) * | 2016-04-07 | 2017-06-07 | Hennlich S.R.O. | A safety valve for protection of hydraulic units |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0241952A1 (en) * | 1983-02-22 | 1987-10-21 | Nupro Company | Pressure relief valve |
| US4790347A (en) * | 1986-11-06 | 1988-12-13 | Gewerkschaft Eisenhutte Westfalia Gmbh | Pressure-relief valve devices |
| CN2222273Y (en) * | 1993-10-14 | 1996-03-13 | 王建国 | No negative pressure type hydraulic safety valve |
| CN2500877Y (en) * | 2001-08-20 | 2002-07-17 | 营口市恒星自动化仪表厂 | Self-operated pressure reducing valve |
| CN1432752A (en) * | 2002-01-11 | 2003-07-30 | 沃尔沃建造设备控股（瑞典）有限公司 | Guiding pressure rise controlling valve |
| DE202006009403U1 (en) * | 2006-06-14 | 2006-08-17 | Marco Systemanalyse Und Entwicklung Gmbh | Pressure limiting valve e.g. for hydraulic systems, has body in which piston is adjustable in axial direction against pressure of compression spring and flow channel arranged in body has tap in rigid connection |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE757563C (en) * | 1939-12-28 | 1953-05-26 | Schiff Und Maschb A G Deutsche | Safety valve |
| DE1055911B (en) * | 1955-12-24 | 1959-04-23 | Bosch Gmbh Robert | Pressure relief valve |
| SU476397A1 (en) * | 1973-08-10 | 1975-07-05 | Предприятие П/Я А-7899 | Safety valve |
| US3987814A (en) * | 1975-03-17 | 1976-10-26 | Caterpillar Tractor Co. | Flow responsive poppet relief valve |
| WO1991003621A1 (en) * | 1989-09-01 | 1991-03-21 | Richard Voss Grubenausbau Gmbh | Pressure limiting valve with teflon seal |
| DE10155629A1 (en) * | 2001-11-13 | 2003-05-22 | Bosch Rexroth Ag | poppet valve |
| DE10260662A1 (en) * | 2002-12-23 | 2004-07-01 | Bosch Rexroth Ag | Multi-purpose industrial system hydraulic valve has radial link to connector converting valve seat edge to a sliding edge |
-
2008
- 2008-09-02 DE DE102008045419A patent/DE102008045419A1/en not_active Withdrawn
-
2009
- 2009-09-01 PL PL388943A patent/PL212440B1/en unknown
- 2009-09-01 CN CN2009101716499A patent/CN101666388B/en not_active Expired - Fee Related
- 2009-09-01 RU RU2009132899/06A patent/RU2415324C1/en active
- 2009-09-01 UA UAA200909059A patent/UA97514C2/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0241952A1 (en) * | 1983-02-22 | 1987-10-21 | Nupro Company | Pressure relief valve |
| US4790347A (en) * | 1986-11-06 | 1988-12-13 | Gewerkschaft Eisenhutte Westfalia Gmbh | Pressure-relief valve devices |
| CN2222273Y (en) * | 1993-10-14 | 1996-03-13 | 王建国 | No negative pressure type hydraulic safety valve |
| CN2500877Y (en) * | 2001-08-20 | 2002-07-17 | 营口市恒星自动化仪表厂 | Self-operated pressure reducing valve |
| CN1432752A (en) * | 2002-01-11 | 2003-07-30 | 沃尔沃建造设备控股（瑞典）有限公司 | Guiding pressure rise controlling valve |
| DE202006009403U1 (en) * | 2006-06-14 | 2006-08-17 | Marco Systemanalyse Und Entwicklung Gmbh | Pressure limiting valve e.g. for hydraulic systems, has body in which piston is adjustable in axial direction against pressure of compression spring and flow channel arranged in body has tap in rigid connection |
Also Published As
| Publication number | Publication date |
|---|---|
| PL212440B1 (en) | 2012-10-31 |
| DE102008045419A1 (en) | 2010-03-04 |
| UA97514C2 (en) | 2012-02-27 |
| RU2415324C1 (en) | 2011-03-27 |
| CN101666388A (en) | 2010-03-10 |
| PL388943A1 (en) | 2010-03-15 |
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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 |
Granted publication date: 20110504 Termination date: 20200901 |
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| CF01 | Termination of patent right due to non-payment of annual fee |