CN204312797U - Limit overshoot formula definite value safety valve - Google Patents
Limit overshoot formula definite value safety valve Download PDFInfo
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- CN204312797U CN204312797U CN201420799951.5U CN201420799951U CN204312797U CN 204312797 U CN204312797 U CN 204312797U CN 201420799951 U CN201420799951 U CN 201420799951U CN 204312797 U CN204312797 U CN 204312797U
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- poppet valve
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Abstract
A kind of limit overshoot formula definite value safety valve, it comprises body, and described body 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; Described body inner sleeve has a poppet valve body, is provided with a lug boss in described poppet valve body, and the center of described lug boss has a poppet valve mouth, and one along the poppet valve core of poppet valve mouth movement, can be 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 sliding in described pressure regulator valve core retainer plate is provided with an adjusting pressuring valve core, and a pressure adjusting spring, and two ends are resisted against the tapered protrusion of described adjusting pressuring valve core and poppet valve core respectively; And one limits overshoot nut, in the middle of rear end, is provided with the abutting part being resisted against described adjusting pressuring valve core rear end; Thus, the utility model regulative mode is simple and reliable, and after reaching the oil pressure relief value of setting, oil pressure relief value can not overshoot.
Description
Technical field
The utility model relates to the technical field of drilling equipment, and 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 utility model 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.
Model utility content
The purpose of this utility model 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 utility model discloses a kind of limit overshoot formula definite value safety valve, it comprises body, it is characterized in that:
The front end sleeve of described body 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.
Wherein: also comprise 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.
Wherein: also comprise a limit 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.
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.
Wherein: the front end of described valve pocket is working pressure oil pocket P, described valve pocket is closed by cone valve forward slip under being provided with a normality, 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.
Wherein: the periphery of described adjusting pressuring valve core is provided with seal ring.
Wherein: described seal ring is labyrinth seal.
Thus, the beneficial effects of the utility model are:
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 utility model 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 utility model is described in detail.
See Fig. 1, the utility model 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 utility model, 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 utility model 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 utility model has the advantage of:
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 utility model, application or use.Although described in an embodiment and be described in the drawings embodiment, but the utility model 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 utility model, scope of the present utility model will comprise any embodiment of specification and the appended claim fallen into above.
Claims (7)
1. limit an overshoot formula definite value safety valve, it comprises body, it is characterized in that:
The front end sleeve of described body 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.
2. limit overshoot formula definite value safety valve as claimed in claim 1, it is characterized in that: also comprise a pressure adjusting spring, the rear end of described pressure adjusting spring is sleeved on described extension rod, 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.
3. limit overshoot formula definite value safety valve as claimed in claim 1, it is characterized in that: also comprise a limit 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.
4. limit overshoot formula definite value safety valve as claimed in claim 3, 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.
5. limit overshoot formula definite value safety valve as claimed in claim 1, it is characterized in that: the front end of described valve pocket is working pressure oil pocket P, described valve pocket is closed by cone valve forward slip under being provided with a normality, 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.
6. 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.
7. limit overshoot formula definite value safety valve as claimed in claim 6, is characterized in that: described seal ring is labyrinth seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420799951.5U CN204312797U (en) | 2014-12-16 | 2014-12-16 | Limit overshoot formula definite value safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420799951.5U CN204312797U (en) | 2014-12-16 | 2014-12-16 | Limit overshoot formula definite value safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204312797U true CN204312797U (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420799951.5U Active CN204312797U (en) | 2014-12-16 | 2014-12-16 | Limit overshoot formula definite value safety valve |
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| CN (1) | CN204312797U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671520A (en) * | 2019-10-12 | 2020-01-10 | 段井胜 | One-way pressure reducing valve with safety function |
-
2014
- 2014-12-16 CN CN201420799951.5U patent/CN204312797U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671520A (en) * | 2019-10-12 | 2020-01-10 | 段井胜 | One-way pressure reducing valve with safety function |
| CN110671520B (en) * | 2019-10-12 | 2020-11-06 | 广东泰恩流体控制设备有限公司 | One-way pressure reducing valve with safety function |
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