CN104455597A - Overshoot-limited fixed-value safety valve - Google Patents
Overshoot-limited fixed-value safety valve Download PDFInfo
- Publication number
- CN104455597A CN104455597A CN201410782183.7A CN201410782183A CN104455597A CN 104455597 A CN104455597 A CN 104455597A CN 201410782183 A CN201410782183 A CN 201410782183A CN 104455597 A CN104455597 A CN 104455597A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve core
- rear end
- overshoot
- pressure
- 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
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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
- F16K17/06—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 adjusting the opening pressure
Abstract
The invention discloses an overshoot-limited fixed-value safety valve. The overshoot-limited fixed-value safety valve comprises a body, a pressure-regulation spring and an overshoot limiting nut. A valve bush is sleeved with the front end of the body, a conical valve is slidably arranged in the valve bush, and a slide valve is slidably arranged in a clearance of the conical valve. A lifting valve is sleeved inside the body, a projection part is arranged in the lifting valve and the center of the projection part is provided with a lifting valve port and a lifting valve spool moving along the lifting valve port. A retaining spring is arranged between the projection part and a flange of the slide valve. A pressure-regulation valve spool barrel is arranged at the rear end of the body, and a pressure-regulation valve spool is slidably arranged in the pressure-regulation valve spool barrel. Two ends of the pressure-regulation spring are abutted against the pressure-regulation valve spool an the conical projection of the lifting valve spool respectively, and the middle of the rear end of the overshoot limiting nut is abutted against the butting portion of the rear end of the pressure-regulation valve spool. The overshoot-limited fixed-value safety valve is simple and reliable in regulation ways, and after the preset overflow pressure value is reached, overshooting of the overflow pressure value is avoided.
Description
Technical field
The present invention relates to the technical field of drilling equipment, being specifically related to that a kind of definite value safety valve, particularly a kind of oil pressure relief reach after setting value just can not the limit overshoot formula definite value safety valve of overshoot.
Background technique
Relief valve is as the pressure controlled valve of hydraulic system, and range of regulation is large, mainly plays level pressure overflow, voltage stabilizing, system unloaded and safety protection effect, during as safety valve, can carry out overload protection to hydraulic system in oil hydraulic circuit.In actual use, producer is by user's request, its maximum oil pressure relief value is set in the range of regulation of safety valve, lead sealing is stamped after verification, as removed lead sealing, oil pressure relief value just can adjust arbitrarily in its range of regulation, can require the maximum oil pressure relief value of setting, in use there is potential safety hazard far beyond user.After lead sealing is impaired, safety valve has to pass through after professional institution verifies again and can use, and practicability is poor.
For this reason, artificer of the present invention is because above-mentioned defect, and by concentrating on studies and designing, comprehensive experience and the achievement being engaged in related industry for a long time for many years, research and design goes out a kind of limit overshoot formula definite value safety valve, to overcome above-mentioned defect.
Summary of the invention
Object of the present invention is just to overcome above-mentioned the deficiencies in the prior art, provide a kind of easy to operate, processing technology simple, limited the limit overshoot formula definite value safety valve of the oil pressure relief overshoot of safety valve by mechanical structure mode.
For achieving the above object, the invention discloses a kind of limit overshoot formula definite value safety valve, it comprises body, it is characterized in that:
Described body is Hollowed sleeve structure, and its front end sleeve has a valve pocket, and sliding in described valve pocket is provided with a cone valve, and described cone valve internal clearance slides and is provided with guiding valve, and the rear end of described guiding valve is provided with the flange that is stopped at the endoporus of cone valve;
Described body inner sleeve has a poppet valve body, a lug boss is provided with in described poppet valve body, the center of described lug boss has a poppet valve mouth, and one can along the poppet valve core of poppet valve mouth movement, the middle part of described poppet valve core is provided with the tapered flanges being limited in described poppet valve mouth, is provided with stopper spring between described lug boss and the flange of guiding valve;
The rear end of described body is provided with a pressure regulator valve core retainer plate, and described pressure regulator valve core retainer plate is fixed on the rear end inner chamber of described poppet valve body, and sliding in described pressure regulator valve core retainer plate is provided with an adjusting pressuring valve core, and the front end of described adjusting pressuring valve core is provided with extension rod;
And a pressure adjusting spring, the rear end of described pressure adjusting spring is sleeved on described extension rod, and front end is sleeved on the rear end of described poppet valve core, and the two ends of pressure adjusting spring are resisted against the lug boss of described adjusting pressuring valve core and poppet valve core respectively;
And one limits overshoot nut, described limit overshoot nut inner edge is provided with helical toothing in the externally threaded internal thread of rear end outer rim of described pressure regulator valve core retainer plate, is provided with the abutting part being resisted against described adjusting pressuring valve core rear end in the middle of the rear end of described limit overshoot nut;
The front end of described valve pocket is working pressure oil pocket P, and described valve pocket is closed by cone valve forward slip under being provided with a normality, and slide backward the return opening be communicated with working pressure oil pocket, described return opening is communicated in oil back chamber, and for carrying chamber between described cone valve and valve body.
Wherein: the periphery of described adjusting pressuring valve core is provided with seal ring.
Wherein: described seal ring is labyrinth seal.
Wherein: described abutting part is conical, and the tap web of this conical abutting part is resisted against described adjusting pressuring valve core back-end central.
Thus, the invention has the beneficial effects as follows:
1, structure is simple, easy to operate;
2, regulative mode is simple and reliable, and after reaching the oil pressure relief value of setting, oil pressure relief value can not overshoot.
Detailed content of the present invention obtains by explanation described later and institute's accompanying drawing.
Accompanying drawing explanation
Fig. 1 is limited the sectional view of overshoot formula definite value safety valve.
Reference character in figure:
1-guiding valve, 2-valve pocket, 3-cone valve, 4-stopper spring, 5-poppet valve core, 6-pressure adjusting spring, 7-adjusting pressuring valve core, 8-pressure regulator valve core retainer plate, 9-limit overshoot nut, P-working pressure oil pocket, T-oil back chamber, a-to carry chamber.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
See Fig. 1, the present invention relates to a kind of limit overshoot formula definite value safety valve, it comprises body, described body is Hollowed sleeve structure, its front end sleeve has a valve pocket 2, slide in described valve pocket 2 and be provided with a cone valve 3, described cone valve 3 internal clearance slides and is provided with guiding valve 1, and the rear end of described guiding valve 1 is provided with one can make the flange of guiding valve 1 stopped forward in cone valve 3.
Described body inner sleeve has a poppet valve body, a lug boss is provided with in described poppet valve body, the center of described lug boss has a poppet valve mouth, and one can along the poppet valve core 5 of poppet valve mouth movement, the described middle part carrying poppet valve core 5 is provided with the tapered flanges being limited in described poppet valve mouth, is provided with stopper spring 4 between the flange of described lug boss and guiding valve 1.
For realizing restriction overshoot of the present invention, the rear end of described body is provided with a pressure regulator valve core retainer plate 8, described pressure regulator valve core retainer plate 8 can be fixed on the inner edge, rear end of described poppet valve body, slide in described pressure regulator valve core retainer plate 8 and be provided with an adjusting pressuring valve core 7, the periphery of described adjusting pressuring valve core 7 is provided with seal ring, preferably, described seal ring is labyrinth seal, the front end of described adjusting pressuring valve core 7 is provided with extension rod, and a pressure adjusting spring 6, the rear end of described pressure adjusting spring 6 is sleeved on described extension rod, front end is sleeved on the rear end of described poppet valve core 5, and the two ends of pressure adjusting spring 6 are resisted against the tapered protrusion of described adjusting pressuring valve core 7 and poppet valve core 5 respectively, thus elastic pre-stress is formed between adjusting pressuring valve core 7 and poppet valve core 5.
And one limits overshoot nut 9, described limit overshoot nut 9 inner edge is provided with helical toothing in the externally threaded internal thread of rear end outer rim of described pressure regulator valve core retainer plate 8, can move forward and backward along described pressure regulator valve core retainer plate 8 to make limit overshoot nut 9, the abutting part being resisted against described adjusting pressuring valve core 7 rear end is provided with in the middle of the rear end of described limit overshoot nut 9, optionally, described abutting part is conical, and the tap web of this conical abutting part is resisted against described adjusting pressuring valve core 7 back-end central.
The front end of described valve pocket 2 is working pressure oil pocket P, described valve pocket 2 is closed by cone valve 3 under being provided with a normality and cone valve 3 retreats time the return opening that is communicated with working pressure oil pocket P, described return opening is communicated in oil back chamber T, and for carrying chamber a between described cone valve 3 and valve body.
Thus, when pressure oil enters working pressure oil pocket P, pressure oil is entered by the gap between guiding valve 1 and cone valve 3 and carries chamber a, when working pressure is lower than oil pressure relief value, poppet valve core 5 is resisted against poppet valve mouth, and to close, cone valve 3 is pressed on valve pocket 2 under the effect of stopper spring 4 and oil pressure, valve pocket 2 and the sealing of working pressure oil pocket, separate working pressure oil pocket and oil back chamber.When the oil pressure of working pressure oil pocket P exceedes oil pressure relief value, poppet valve core 5 retreats to open, hydraulic oil flows through the gap between guiding valve 1 and cone valve 3, now in working pressure oil pocket P chamber with carry between a of chamber and produce pressure reduction, carry the oil pressure of oil pressure lower than working pressure oil pocket P chamber of chamber a, guiding valve 1 moves right until be close to poppet valve core 5 under this differential pressure action, now the oil pressure of working pressure oil pocket P directly passes to poppet valve core 5 to the active force of guiding valve 1, poppet valve core 5 is opened further, thus the oil pressure carrying chamber a reduces rapidly, cone valve 3 is just opened rapidly under working pressure oil pocket P with the differential pressure action carrying chamber a, working pressure oil pocket P chamber and oil back chamber T UNICOM, play overflow protective action.
Thus, the present invention can promote adjusting pressuring valve core 7 move forward and backward by turning limit overshoot nut 9, to regulate the decrement of pressure adjusting spring 6, and then changes the initial tension of spring that pressure adjusting spring 6 is subject to, thus regulates the oil pressure relief value of definite value safety valve.
When described limit overshoot nut 9 is fully tightened, definite value safety valve reaches the maximum oil pressure relief value of setting, and now oil pressure relief value can not overshoot.This limit overshoot nut 9 adopts female thread structure to be connected with the outside thread of pressure regulator valve core retainer plate 8, the laboratory data of its height of thread corresponding to different oil pressure relief values designs, when ensureing that limit overshoot nut 9 is tightened, the oil pressure relief value of definite value safety valve just meets design requirement.
And on the top, inner side of limit overshoot nut 9, devise fine setting cone and trimming groove, the height of fine setting cone and the groove width of trimming groove, meet the fine setting demand of safety valve oil pressure relief value.This limit overshoot nut 9 adopts enclosed construction, without adjustable screw thread on adjusting pressuring valve core 7, the oil pressure relief value of definite value safety valve can only be regulated by limit overshoot nut 9, and regulative mode is simple and reliable, after reaching the oil pressure relief value of setting, oil pressure relief value can not overshoot.
Thus, the invention has the advantages that:
1, structure is simple, easy to operate;
2, regulative mode is simple and reliable, and after reaching the oil pressure relief value of setting, oil pressure relief value can not overshoot.
It is evident that, above description and record be only citing instead of in order to limit disclosure of the present invention, application or use.Although described in an embodiment and be described in the drawings embodiment, but the present invention do not limit by accompanying drawing example and describe in an embodiment as the optimal mode thought at present to implement the specific examples of instruction of the present invention, scope of the present invention will comprise any embodiment of specification and the appended claim fallen into above.
Claims (4)
1. limit an overshoot formula definite value safety valve, it comprises body, it is characterized in that:
Described body is Hollowed sleeve structure, and its front end sleeve has a valve pocket, and sliding in described valve pocket is provided with a cone valve, and sliding in described cone valve is provided with guiding valve, and the rear end of described guiding valve is provided with the flange that is stopped at the endoporus of cone valve;
Described body inner sleeve has a poppet valve body, a lug boss is provided with in described poppet valve body, the center of described lug boss is provided with a poppet valve mouth, and one can along the poppet valve core of poppet valve mouth movement, the described middle part carrying poppet valve core is provided with the tapered flanges being limited in described poppet valve mouth, is provided with stopper spring between described lug boss and the flange of guiding valve;
The rear end of described body is provided with a pressure regulator valve core retainer plate, and described pressure regulator valve core retainer plate is fixed on the rear end inner chamber of described poppet valve body, and sliding in described pressure regulator valve core retainer plate is provided with an adjusting pressuring valve core, and the front end of described adjusting pressuring valve core is provided with extension rod;
And a pressure adjusting spring, the rear end of described pressure adjusting spring is sleeved on described extension rod, and front end is sleeved on the rear end of described poppet valve core, and the two ends of pressure adjusting spring are resisted against the lug boss of described adjusting pressuring valve core and poppet valve core rear end respectively;
And one limits overshoot nut, described limit overshoot nut inner edge is provided with helical toothing in the externally threaded internal thread of rear end outer rim of described pressure regulator valve core retainer plate, is provided with the abutting part being resisted against described adjusting pressuring valve core rear end in the middle of the rear end of described limit overshoot nut;
The front end of described valve pocket is working pressure oil pocket P, and described valve pocket is closed by cone valve forward slip under being provided with a normality, and slide backward the return opening be communicated with working pressure oil pocket, described return opening is communicated in oil back chamber, and for carrying chamber between described cone valve and valve pocket.
2. limit overshoot formula definite value safety valve as claimed in claim 1, is characterized in that: the periphery of described adjusting pressuring valve core is provided with seal ring.
3. limit overshoot formula definite value safety valve as claimed in claim 2, is characterized in that: described seal ring is labyrinth seal.
4. limit overshoot formula definite value safety valve as claimed in claim 1, is characterized in that: described abutting part is for conical, and the tap web of this conical abutting part is resisted against described adjusting pressuring valve core back-end central.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410782183.7A CN104455597A (en) | 2014-12-16 | 2014-12-16 | Overshoot-limited fixed-value safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410782183.7A CN104455597A (en) | 2014-12-16 | 2014-12-16 | Overshoot-limited fixed-value safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104455597A true CN104455597A (en) | 2015-03-25 |
Family
ID=52902120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410782183.7A Pending CN104455597A (en) | 2014-12-16 | 2014-12-16 | Overshoot-limited fixed-value safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104455597A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180303A (en) * | 2018-01-05 | 2018-06-19 | 米顿罗工业设备（上海）有限公司 | A kind of double dampings are without diaphragm high pressure counterbalance valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3014202A1 (en) * | 1980-04-14 | 1981-10-15 | Linde Ag, 6200 Wiesbaden | SLIDE VALVE |
| CN2289104Y (en) * | 1996-12-05 | 1998-08-26 | 青州液压件厂 | Safety valve for integral multi-way valve |
| CN1932309A (en) * | 2005-09-15 | 2007-03-21 | 沃尔沃建造设备控股（瑞典）有限公司 | Hydraulic relief valve |
| CN201475070U (en) * | 2009-08-21 | 2010-05-19 | 宁波汉商液压有限公司 | Cartridge balance valve |
| CN202500847U (en) * | 2012-02-29 | 2012-10-24 | 泸州国邦机械有限公司 | Overload valve |
| CN103375615A (en) * | 2012-04-19 | 2013-10-30 | 哈米尔顿森德斯特兰德公司 | Overpressure relief valve assembly |
| CN203694336U (en) * | 2013-12-13 | 2014-07-09 | 科迈（常州）电子有限公司 | Breathing machine overload safety valve with dual protection function |
-
2014
- 2014-12-16 CN CN201410782183.7A patent/CN104455597A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3014202A1 (en) * | 1980-04-14 | 1981-10-15 | Linde Ag, 6200 Wiesbaden | SLIDE VALVE |
| CN2289104Y (en) * | 1996-12-05 | 1998-08-26 | 青州液压件厂 | Safety valve for integral multi-way valve |
| CN1932309A (en) * | 2005-09-15 | 2007-03-21 | 沃尔沃建造设备控股（瑞典）有限公司 | Hydraulic relief valve |
| CN201475070U (en) * | 2009-08-21 | 2010-05-19 | 宁波汉商液压有限公司 | Cartridge balance valve |
| CN202500847U (en) * | 2012-02-29 | 2012-10-24 | 泸州国邦机械有限公司 | Overload valve |
| CN103375615A (en) * | 2012-04-19 | 2013-10-30 | 哈米尔顿森德斯特兰德公司 | Overpressure relief valve assembly |
| CN203694336U (en) * | 2013-12-13 | 2014-07-09 | 科迈（常州）电子有限公司 | Breathing machine overload safety valve with dual protection function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180303A (en) * | 2018-01-05 | 2018-06-19 | 米顿罗工业设备（上海）有限公司 | A kind of double dampings are without diaphragm high pressure counterbalance valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |