CN101387350A - Pressure limiting valve - Google Patents
Pressure limiting valve Download PDFInfo
- Publication number
- CN101387350A CN101387350A CNA2008102118356A CN200810211835A CN101387350A CN 101387350 A CN101387350 A CN 101387350A CN A2008102118356 A CNA2008102118356 A CN A2008102118356A CN 200810211835 A CN200810211835 A CN 200810211835A CN 101387350 A CN101387350 A CN 101387350A
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- cell
- limit
- valve cell
- 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
- 238000005325 percolation Methods 0.000 claims abstract description 10
- 210000000635 valve cell Anatomy 0.000 claims description 60
- 238000013016 damping Methods 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 5
- 239000007921 spray Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
-
- 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
- F16K17/044—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 more than one spring
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Safety Valves (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
Abstract
A pressure limiting valve comprises a valve body, in which a percolation pipe is formed therein, wherein the percolation pipe is sealed by a valve piston loaded by a spring, and the valve piston and a valve seat constitute a first valve unit and hermetically seal a first discharge pipe. The pressure limiting valve is provided with a second valve unit and designed as a secondary switch valve.
Description
Technical field
The present invention relates to a kind of pressure-limit valve that is used for hydraulic system.
Background technique
In known technology, have pressure-limit valve.
Summary of the invention
The object of the present invention is to provide a kind of pressure-limit valve, this pressure-limit valve utilizes few components to realize mild cutting out.
This purpose realizes by the pressure-limit valve with following characteristics.Pressure-limit valve according to the present invention comprises a valve body, forms the percolation pipeline in the described valve body, and this percolation pipeline is by the spring-biased valve piston closes, and this valve piston constitutes first valve cell with affiliated valve seat, and is sealed shut first discharge conduit.According to the present invention, second valve cell is set at this, and this pressure-limit valve is designed to secondary switch valve in the inside of valve body.By this way when having overvoltage, before another valve cell, at first open for one in two valve cells.Can realize mild closing conversely when valve cuts out, at first discharge value reduces by a valve cell, and second valve cell is closed under the pressure that has descended afterwards.Thus, the seal ring that in the zone of second valve cell, is provided be considered (geschont).
In order to realize the opening and closing that are subjected to damping of second valve cell, this second valve cell has seal ring, wherein in the sealing ring zone of second valve cell constriction is set.This constriction particularly can design with the form of labyrinth type seal or perhaps labyrinth, thereby when opening, at first stop bigger discharge value, and when labyrinth type seal was opened by opening second valve cell, this discharge value just can realize.
An advantageous embodiment of the invention in specification, in the accompanying drawing to set forth in the dependent claims.
According to first advantageous embodiments, when pressure raise above predetermined value, first valve cell was at first opened, and then second valve cell is opened, thereby pressure-limit valve can promptly react by opening first valve cell when pressure raises.Simultaneously can guarantee that high flow capacity discharged by valve by opening second valve cell.
Advantageously, when cut-off valve after opening before, at first first valve cell is closed, and then second valve cell is closed with being subjected to damping, suddenly is carried in the Sealing that is provided with in the valve thereby stoped.
When second valve cell was sealed shut second discharge conduit, the flow cross of second discharge conduit was greater than the flow cross of first discharge conduit, thereby when second valve cell is opened fully, guaranteed that big flow discharges from pressure-limit valve.
According to another embodiment, second valve cell has restriction, and it has the opening that continues to open.This means that when pressure-limit valve cut out, liquid was in first valve cell and second valve cell simultaneously.If pressure raises, first valve cell is opened, and therefore forms pressure and descend after restriction, and it has guaranteed that second valve cell can also open.
According to an advantageous embodiment of the invention, this second valve cell has spring-loaded sleeve pipe, and one is distolateral to be resisted against on the seal ring.Can guarantee by this way, when opening second valve cell, can realize circulation by its whole circumference, wherein, pressure flow this sleeve pipe of can flowing through simultaneously, so as to cause in advance first valve cell release (
).
According to an advantageous embodiment of the invention, labyrinth type seal constitutes by the piston that utilizes gap size to insert in the hole at least in part, and wherein this piston particularly can be connected with the sleeve pipe of second valve cell.By this way, this pressure flow must at first be passed in gap between the exterior periphery of piston and the hole, and the increase gap of opening along with second valve cell just enlarges gradually, thereby discharge value correspondingly improves.
Advantageously, labyrinth type seal is arranged on the restriction upstream of decision design on second valve cell from circulating direction.By this way, the flow volume of throttling always is not on second valve cell.
Another advantageous embodiments according to the present invention, at least the second valve cell (also preferred certainly first valve cell) has seal ring, and at least 75% cross section of sealing ring is centered on by supporting element.This make has been guaranteed to keep seal ring reliably when opening and closing valve cell, and does not produce (herausrollt) from its position, is not also clamped when control valve.
Advantageously, when valve body in valve only is made up of three parts that are screwed together each other altogether, can realize producing at an easy rate pressure-limit valve thus.Therefore when the sealing environment protecting of second valve cell is held between two housing parts that are screwed together each other, be favourable, because can omit other supporting element in this case.
Description of drawings
Other details, advantage and purpose of the present invention are by drawing in the following description of preferred embodiments, and these embodiments set forth by schematic representation; Show in the diagram:
Fig. 1 be in off position in the sectional view of pressure-limit valve;
Fig. 2 a is the regional area sectional view according to the pressure-limit valve of Fig. 1 in local opening state; And
Fig. 2 b is according to the regional area sectional view of Fig. 2 a in opening state.
Embodiment
Pressure-limit valve shown in Figure 1 comprises a valve body, and this valve body is made up of the spring housing 10 with internal thread, and this spring housing is screwed on the main body 12.Take over 14 and be screwed in the free end of main body 12, this adapter utilizes its outside thread to be screwed in the corresponding internal thread of main body 12.Percolation passage 30 extends by valve body, and this passage forms by taking over 14 endoporus 31, the endoporus 50 of main body 12 and the through hole 32 of design in main body 12.As shown in Figure 1, endoporus 31, deep hole 50 (Sackbohrung) and through hole 32 join, wherein this deep hole 50 has diameter D, and the supporting sleeve with diameter d is embedded in this through hole 32, its end side surface is used for the supporting surface as O shape ring 34, this O shape ring is resisted against on the support ring of annular, and this support ring and main body 12 one constitute.And then this O shape ring 34 surrounds and forms valve seat by support on its cross section of about 75%.
For with respect to spring housing 10 seal valve pistons 40, another O shape ring 46 is set on the exterior periphery of valve piston 40.Reference number 48 mark seal rings.Usually, previous constructions is to constitute as the identical mode of describing in German utility model DE 20 2,006 009 403 U1, and its disclosure is passed through reference as content of the present invention.
At 1/3rd places of deep hole 50 (from circulating direction), another discharge conduit 52 of radial design feeds in this deep hole, this another discharge conduit seals by the sleeve pipe 56 that can move in deep hole 50 and externally seal on the circumference by O shape ring 54 in the closed condition of shown pressure-limit valve, this sleeve pipe utilizes the end face of one end side surface to be pressed against on the O shape ring 60 by spring 58, and this O shape environmental protection is held in main body 12 and takes between 14.
Be screwed into piston 62 in the end (right side among Fig. 1) of sleeve pipe 56, this piston has the through hole 64 at center, and this through hole uses as throttle orifice.Thus, the exterior periphery of this piston 62 is consistent with the endoporus 31 of taking over 14 except gap size.As shown, piston 62 reaches in the closed condition of pressure-limit valve in half endoporus 31 that is inserted into adapter 14 approximately, and wherein the less slit between piston 62 and endoporus 31 forms constriction (Durchflussbegrenzer).This slit forms labyrinth type seal with second valve cell of adjacency (with the form of the end side surface end of O shape ring 60 and sleeve pipe 56), work as damping device, wherein the end side surface end of this sleeve pipe 56 be designed to thin, around support 57.
As particularly in Fig. 2 b, seeing, take over 14 the support 59 that be designed to approach, annular of the end in circulating direction mid-rear portion end side surface, its outer dia is consistent with the inside diameter of support 57 except gap size, and this support 57 constitutes on sleeve pipe 56.
Mark with reference identification 66 and to be used to take over another seal ring of 14.Reference identification 68 marks are provided with locking ring seal ring, that press-fited, and this locking ring is used for the sputter protection.
Below, particularly set forth the working principle of aforementioned pressure-limit valve with reference to figure 2a and Fig. 2 b:
Fig. 1 shows pressure-limit valve under normal conditions, has first and second valve cells of closing in other words, and wherein under this state, pressure flow is in that to take over 14 endoporus 31 inner and in deep hole 50 inside of main body 12.From first discharge conduit 44, spray and from second discharge conduit 52, spray by first valve cell prevention pressure flow by second valve cell prevention pressure flow.
When pressure is elevated on the predetermined critical value now, so at first so operation, promptly valve piston 40 power that overcomes spring 38 is lifted away from O shape ring 34, thus pressure flow can be by discharge conduit 44 ejections.In case in this case, the throttle orifice pressure afterwards that forms by piston 62 and through hole 64 descends, and in other words, the pressure that wherein is provided with the cavity inside of spring 58 descends.Therefore, sleeve pipe 56 moves on circulating direction, and this is shown in Fig. 2 a.The labyrinth type seal of certain second valve cell at first stops bigger discharge value, in other words, second valve cell is not suddenly to open but open lentamente in other words, and wherein this labyrinth type seal forms by gap between piston 62 and endoporus 31 and support 57,59.At first along with moving of increasing, labyrinth type seal is fully opened, and pressure flow can spray from second discharge conduit 52 then, and this second discharge conduit is fully opened (with reference to Fig. 2 b) now.
When then the pressure in passage 30 descends once more, thus first valve cell at first close, mode is that the stopper 42 by valve piston 40 is pressed on the O shape ring 34.Pressure in endoporus 50 raises once more then, moves (in the diagram to the right) thereby this sleeve pipe 56 is in reverse to circulating direction.In case this sleeve pipe has arrived the position shown in Fig. 2 a, because default labyrinth type seal, this back pressure raises once more, thereby this sleeve pipe 56 moves in its closed position with being subjected to damping lentamente and.
Reference identification
10 spring housings, 48 sealing rings
12 main bodys, 50 deep holes
14 take over 52 second discharge lines
30 percolation passages, 54 O shapes ring
31 endoporus, 56 sleeve pipes
32 through holes, 57 supports
34 O shapes are encircled 58 springs
36 supporting sleeves, 59 supports
38 springs, 60 O shapes ring
40 valve pistons, 62 pistons
42 valve plugs, 64 through holes
44 first discharge conduits, 66 O shapes ring
46 O shapes are encircled 68 locking rings.
Claims (13)
1. pressure-limit valve, comprise valve body (10-14), in described valve body, form percolation pipeline (30), described percolation pipeline is sealed by spring-loaded valve piston (40), described valve piston constitutes first valve cell and is sealed shut first discharge conduit (44) with affiliated valve seat (34), wherein second valve cell (56,60) is set in described valve body (10-14) inside
Described pressure-limit valve is designed to secondary switch valve,
Described second valve cell has seal ring (60), and in the zone of described seal ring (60) constriction is set on described second valve cell.
2. pressure-limit valve according to claim 1 is characterized in that, when pressure raise above predetermined value, described first valve cell was at first opened, and then described second valve cell (56,60) is opened.
3. pressure-limit valve according to claim 1 and 2 is characterized in that, when cut-off valve after opening before, at first described first valve cell is closed, and then described second valve cell (56,60) is closed with being subjected to damping.
4. according to claim 1,2 or 3 described pressure-limit valves, it is characterized in that, described second valve cell (56,60) is sealed shut described second discharge conduit (44), and the flow cross of described second discharge conduit is especially greater than the flow cross of described first discharge conduit (44).
5. according at least one described pressure-limit valve in the aforementioned claim, it is characterized in that described second valve cell (56,60) has restriction (62), it has the opening (64) that continues to open.
6. according at least one described pressure-limit valve in the aforementioned claim, it is characterized in that described second valve cell has spring-loaded sleeve pipe (56), distolateral being resisted against on the seal ring (60) of described sleeve pipe.
7. according at least one described pressure-limit valve in the aforementioned claim, it is characterized in that described constriction designs with the form of labyrinth type seal.
8. pressure-limit valve according to claim 7, it is characterized in that, by utilizing the piston (62) in the gap size patchhole (31) to constitute, wherein said piston particularly is connected with the sleeve pipe (56) of described second valve cell described labyrinth type seal at least in part.
9. pressure-limit valve according to claim 8 is characterized in that, described piston (62) is arranged in the zone of end of described sleeve pipe (56).
10. according at least one described pressure-limit valve in the claim 7 to 9, it is characterized in that described labyrinth type seal is arranged on throttle orifice (64) upstream of design on described second valve cell from circulating direction.
11. according at least one described pressure-limit valve in the aforementioned claim, it is characterized in that described at least second valve cell has seal ring (60), at least 75% cross section of described seal ring is centered on by supporting element.
12., it is characterized in that described valve body is made up of three parts that are screwed together each other (10,12,14) altogether according at least one described pressure-limit valve in the aforementioned claim.
13. pressure-limit valve, comprise valve body (10-14), in described valve body, form percolation pipeline (30), described percolation pipeline is sealed by spring-loaded valve piston (40), described valve piston constitutes first valve cell and is sealed shut first discharge conduit (44) with affiliated valve seat (34), wherein second valve cell (56,60) is set in described valve body (10-14) inside
Described pressure-limit valve is designed to secondary switch valve,
The seal ring of described second valve cell (60) remains between two housing parts that are screwed together each other (12,14).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007042982A DE102007042982A1 (en) | 2007-09-10 | 2007-09-10 | Pressure limiting valve i.e. two-stage switch valve, has bodies provided with flow passing pipeline, and valve units provided at inner side of bodies and provided with sealing ring, which is provided with flow limiting element |
| DE102007042982.9 | 2007-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101387350A true CN101387350A (en) | 2009-03-18 |
Family
ID=40435165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102118356A Pending CN101387350A (en) | 2007-09-10 | 2008-09-09 | Pressure limiting valve |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101387350A (en) |
| DE (1) | DE102007042982A1 (en) |
| RU (1) | RU2008136384A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793200A (en) * | 2010-03-10 | 2010-08-04 | 王旭光 | Diesel oil flow-limiting valve for co-firing coke oven gas and diesel oil |
| CN102392909A (en) * | 2011-11-17 | 2012-03-28 | 四川制动科技股份有限公司 | Pressure limiting mechanism of pressure vessel |
| CN103511402A (en) * | 2012-06-18 | 2014-01-15 | 中国航空工业集团公司西安飞机设计研究所 | Method for preventing hydraulic lock and special pressure balance device for preventing hydraulic lock |
| CN105570500A (en) * | 2016-01-29 | 2016-05-11 | 奇瑞汽车股份有限公司 | Hydraulic type pressure retaining valve |
| KR101647939B1 (en) * | 2016-06-03 | 2016-08-11 | 채희동 | Decompression device of a safety valve |
| KR101657174B1 (en) * | 2016-06-03 | 2016-09-19 | 주식회사 건영 | Check valve with a safety valve |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135003A (en) * | 2011-04-08 | 2011-07-27 | 巨隆集团芜湖兴隆液压有限公司 | Cartridge high-flow hard sealing upright post hydraulic control one-way valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2333522A (en) * | 1940-11-22 | 1943-11-02 | Fulflo Specialties Company Inc | Relief valve |
| DE4302080C1 (en) * | 1993-01-27 | 1994-08-18 | Vos Richard Grubenausbau Gmbh | Small pressure relief valve with high flow rate |
| EP1750043B1 (en) * | 2005-08-04 | 2008-04-16 | Bosch Rexroth Oil Control S.p.A. | A device for controlling pressure, in particular but not exclusively for hydraulic piloting of an overpressure 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 |
-
2007
- 2007-09-10 DE DE102007042982A patent/DE102007042982A1/en not_active Ceased
-
2008
- 2008-09-09 RU RU2008136384/06A patent/RU2008136384A/en not_active Application Discontinuation
- 2008-09-09 CN CNA2008102118356A patent/CN101387350A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793200A (en) * | 2010-03-10 | 2010-08-04 | 王旭光 | Diesel oil flow-limiting valve for co-firing coke oven gas and diesel oil |
| CN101793200B (en) * | 2010-03-10 | 2013-04-24 | 王旭光 | Diesel oil flow-limiting valve for co-firing coke oven gas and diesel oil |
| CN102392909A (en) * | 2011-11-17 | 2012-03-28 | 四川制动科技股份有限公司 | Pressure limiting mechanism of pressure vessel |
| CN102392909B (en) * | 2011-11-17 | 2013-04-10 | 四川制动科技股份有限公司 | Pressure limiting mechanism of pressure vessel |
| CN103511402A (en) * | 2012-06-18 | 2014-01-15 | 中国航空工业集团公司西安飞机设计研究所 | Method for preventing hydraulic lock and special pressure balance device for preventing hydraulic lock |
| CN105570500A (en) * | 2016-01-29 | 2016-05-11 | 奇瑞汽车股份有限公司 | Hydraulic type pressure retaining valve |
| CN105570500B (en) * | 2016-01-29 | 2018-06-29 | 奇瑞汽车股份有限公司 | A kind of fluid pressure type pressure retaining valve |
| KR101647939B1 (en) * | 2016-06-03 | 2016-08-11 | 채희동 | Decompression device of a safety valve |
| KR101657174B1 (en) * | 2016-06-03 | 2016-09-19 | 주식회사 건영 | Check valve with a safety valve |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2008136384A (en) | 2010-03-20 |
| DE102007042982A1 (en) | 2009-04-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090318 |