CN102913437B - Multi-hole relief valve of positive displacement pump - Google Patents
Multi-hole relief valve of positive displacement pump Download PDFInfo
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- CN102913437B CN102913437B CN201110220445.7A CN201110220445A CN102913437B CN 102913437 B CN102913437 B CN 102913437B CN 201110220445 A CN201110220445 A CN 201110220445A CN 102913437 B CN102913437 B CN 102913437B
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- displacement pump
- overflow
- relief valve
- valve
- hole
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Abstract
The invention provides a multi-hole relief valve of a positive displacement pump. The multi-hole relief valve comprises a relief valve core mounted at an oil outlet cavity of a positive displacement pump body, a relief valve, a pressure spring, and a spring seat mounted on a lifting lug of an oil inlet cavity of the positive displacement pump, wherein a flange is arranged on the outer surface of the relief valve core of which an inner hole is communicated with the oil outlet cavity of the positive displacement pump; parts of the relief valve core, which are behind the flange, are mounted in the relief valve; the back part of the pressure spring is mounted on the spring seat, and the front part of the pressure spring is propped against the back part of the relief valve; a main hole used for transmitting pressure is formed at the tail part of the relief valve core; and relief holes are formed at the parts of the relief valve core, which are behind the flange. The multi-hole relief valve overcomes the defects of complicated structure, large volume and heavy weight of the prior equipment, has the advantages of simple and ingenious structure, small volume, reliable performance, long service life and opening-closing stability, is convenient to assemble and maintain, is particularly used internally, enables the positive displacement pump to be greatly improved in performance and has remarkable social benefits.
Description
Technical field
The present invention relates to a kind of porous overflow valve for displacement pump.
Background technique
Relief valve is one of displacement pump key structure, and its performance quality directly affects displacement pump performance.The deficiency of current existence is: valve volume is large, and valve opening and closing motion are not steady, and Reliability of Microprocessor is not high, assembling, inconvenient maintenance.
Chinese utility model patent specification notification number CN201407224Y discloses a kind of relief valve (see figure 3), and it is primarily of valve body, main valve seat, main valve plug, guide valve seat, guide valve core, secondary spool, main spool spring, pilot valve spring, gland composition.Main valve seat is fixedly nested with in the vertical core of valve body, and main valve plug activity is nested with in main valve seat; Guide valve seat gap is nested with in main valve plug inner chamber, and secondary spool movable sheath is put in the inner chamber of guide valve seat as secondary pressure chamber, and the sidewall of guide valve seat offers pilot valve throttle orifice, and this pilot valve throttle orifice is connected with main valve oil back chamber.Due to the throttling action of throttle orifice, the hydraulic action of the hydraulic oil applying secondary spool in secondary pressure chamber makes guide valve core aperture increase, spillway discharge increases, and is also namely increased by the flow of the main valve throttle orifice on main valve plug, main valve plug under the effect of pressure difference and spring force on move.The main valve plug of its dynamic seal (packing) is provided with O-ring seals sealing, and have secondary spool, spring, and external is vertically installed, structure is too loaded down with trivial details, and volume is large, Heavy Weight.
Summary of the invention
The object of the invention is to overcome the above-mentioned deficiency of prior art and provide a kind of structure ingenious, volume is little, reliable performance, assembling, easy to maintenance, opens and closes stable built-in porous overflow valve for displacement pump.
Technological scheme of the present invention is: comprise be loaded on the volume pump housing fuel-displaced chamber place overflow spool, flow spill valve, stage clip, be loaded on the spring abutment of displacement pump oil suction chamber hanger; Endoporus and displacement pump go out the relief valve core outer surface that oil pocket is communicated with and are provided with flange; Overflow spool flange is loaded in flow spill valve with rear section; Stage clip rear portion is loaded on spring abutment; Stage clip front portion and flow spill valve rear portion Xiang Ding; The afterbody of overflow spool is provided with the main aperture for conducting pressure; Overflow spool flange is provided with (communicating with relief valve in-core hole) overflow hole with rear section.
Described flow spill valve is step-like semi-closed structure; Described overflow spool flange take rear section as the step-like structure coordinated with flow spill valve inner chamber.
Described spring abutment is provided with the outside thread (can manually rotate rear move axially the elastic force regulating stage clip) be connected with the hanger of displacement pump oil suction chamber.
The outside thread of described overflow spool one end is fixed on the volume pump housing fuel-displaced chamber place by O-ring seals.
Described overflow spool external diameter and flow spill valve endoporus are Spielpassung.
The overflow spool at described overflow hole rear portion is provided with the auxiliary hole of aid conductive pressure; Described auxiliary Kong Weisan.
Described spring abutment afterbody is provided with to regulate has used sub-aperture.
Described spring abutment afterbody is provided with the circular hole for balance; Described circular hole is four.
Described overflow hole is three.
Its dynamic seal (packing) of the present invention is metal hard-sealing, the displacement pump of applicable different medium, level, vertical, inclination mounting type, is particularly suitable for having the medium of corrosion and the occasion of temperature place change.As long as adopt the O-ring seals of unlike material, or cancel O-ring seals, the outside thread of overflow spool one end is directly gone out oil pocket with displacement pump and adopts sealer to be connected.
Simple and ingenious structure of the present invention, volume is little, reliable performance, life-span are long, open and close steadily, assembling, easy to maintenance, and particularly built-in use, makes displacement pump performance greatly improve, have significant social benefit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the right elevation of spring abutment of the present invention.
Fig. 3 is the structural representation of prior art.
In figure, 1, overflow spool, 2, O-ring seals, 3, flow spill valve, 4, stage clip, 5, spring abutment, 6, overflow hole, 7, main aperture, 8, auxiliary hole, 9, play sub-aperture, 10, equalizing orifice, 11, the volume pump housing, 12, go out oil pocket, 13, oil suction chamber, 14, hanger.
Embodiment
In Fig. 1, comprise overflow spool 1, O-ring seals 2, flow spill valve 3, stage clip 4, spring abutment 5.The outside thread of overflow spool 1 one end is fixed with leaning on out the volume pump housing 11 at oil pocket 12 place by O-ring seals 2, and endoporus and the displacement pump of overflow spool 1 go out oil pocket 12 and be communicated with; Flow spill valve 3 endoporus coordinates with overflow spool 1 the other end crest clearance, displacement pump oil suction chamber 13, go out oil pocket 12 pressure reduction and stage clip elastic force effect under move axially along overflow spool 1.Stage clip 4 is equipped with flow spill valve 3 the other end external diameter, spring abutment 5 endoporus respectively.Spring abutment 5 outside thread is connected with the hanger 14 of displacement pump oil suction chamber 13, manually can rotate the rear elastic force moving axially to regulate stage clip 4, thus regulation and control flow spill valve 3 opens required pressure difference.Overflow spool 1 has three oval overflow holes 6 and one and is used for the main aperture 7 of conducting pressure and the auxiliary hole 8 of three aid conductive pressure.Spring abutment 5 has the sub-aperture 9 for regulating, and four equalizing orifices 10.
In Fig. 2,5 is spring abutment, and 9 has been sub-aperture, and 10 is equalizing orifice.
Working principle of the present invention is as follows:
When displacement pump does not work at ordinary times, the present invention is normal closedown under the elastic force effect of stage clip 4.
Raise when displacement pump goes out oil pocket 12 pressure, when being greater than the elastic force of oil suction chamber 13 pressure and stage clip 4, go out oil pocket 12 pressure by the main aperture of overflow spool 1 directly and flow spill valve 3 conducting promote flow spill valve 3 and move to oil suction chamber 13, along with flow spill valve 3 moves axially, the auxiliary hole 8 of three of overflow spool 1 aid conductive pressure is communicated with step in flow spill valve 3, go out oil pocket 12 pressure and act on this interior step end face, flow spill valve 3 is made to turn increase thrust to oil suction chamber 13, further promotion flow spill valve 3 moves to oil suction chamber 13, shift action is increased, at this moment, three oval overflow holes 6 of overflow spool 1 are slowly opened, use oil pocket 12 to be slowly communicated with oil suction chamber 13, go out oil pocket 12 oil and enter oil suction chamber 13, overflow spool 1 internal bore pressures is declined, thus make flow spill valve 3 both sides active force reach balance.
When going out oil pocket 12 pressure drop, under the elastic force effect of stage clip 4, flow spill valve 3 is slowly moved to going out oil pocket 12, first be that three oval overflow holes 6 of overflow spool 1 slowly reduce, along with again to go out oil pocket 12 move time, the auxiliary hole 8 of three aid conductive pressure of overflow spool 1 is slowly closed, and makes the unnecessary fluid of step in flow spill valve 3 stop flow spill valve 3 to move to going out oil pocket 12, shift action is slowed down, until close completely.
Claims (8)
1. a porous overflow valve for displacement pump, is characterized in that: comprise be loaded on the volume pump housing fuel-displaced chamber place overflow spool (1), flow spill valve (3), stage clip (4), be loaded on the spring abutment (5) of displacement pump oil suction chamber hanger; Endoporus and displacement pump go out overflow spool (1) outer surface that oil pocket is communicated with and are provided with flange; Overflow spool (1) flange is loaded in flow spill valve (3) with rear section; Stage clip (4) rear portion is loaded on spring abutment (5); Stage clip (4) front portion and flow spill valve (3) rear portion Xiang Ding; The afterbody of overflow spool (1) is provided with the main aperture for conducting pressure; Overflow spool (1) flange is provided with overflow hole with rear section; Described flow spill valve (3) is step-like semi-closed structure; Described overflow spool (1) flange take rear section as the step-like structure coordinated with flow spill valve (3) inner chamber;
The overflow spool (1) at described overflow hole rear portion is provided with the auxiliary hole of aid conductive pressure.
2. porous overflow valve for displacement pump according to claim 1, is characterized in that: described spring abutment (5) is provided with the outside thread be connected with the hanger of displacement pump oil suction chamber.
3. porous overflow valve for displacement pump according to claim 1, is characterized in that: the outside thread of described overflow spool (1) one end is fixed on the volume pump housing fuel-displaced chamber place by O-ring seals (2).
4. porous overflow valve for displacement pump according to claim 1, is characterized in that: described overflow spool (1) external diameter and flow spill valve (3) endoporus are Spielpassung.
5. porous overflow valve for displacement pump according to claim 1, is characterized in that: described auxiliary Kong Weisan.
6. porous overflow valve for displacement pump according to claim 1, is characterized in that: described spring abutment (5) afterbody is provided with to regulate has used sub-aperture (9).
7. porous overflow valve for displacement pump according to claim 1, is characterized in that: described spring abutment (5) afterbody is provided with the circular hole for balance; Described circular hole is four.
8. porous overflow valve for displacement pump according to claim 1, is characterized in that: described overflow hole is three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110220445.7A CN102913437B (en) | 2011-08-03 | 2011-08-03 | Multi-hole relief valve of positive displacement pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110220445.7A CN102913437B (en) | 2011-08-03 | 2011-08-03 | Multi-hole relief valve of positive displacement pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102913437A CN102913437A (en) | 2013-02-06 |
| CN102913437B true CN102913437B (en) | 2015-07-08 |
Family
ID=47611953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110220445.7A Active CN102913437B (en) | 2011-08-03 | 2011-08-03 | Multi-hole relief valve of positive displacement pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102913437B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2925786A (en) * | 1956-11-23 | 1960-02-23 | Procon Pump & Engineering Co | Pump |
| CN1164271A (en) * | 1993-10-29 | 1997-11-05 | 岚瑟公司 | Relief valve seat for positive displacement pump |
| CN1270663A (en) * | 1997-09-10 | 2000-10-18 | 伯恩特·洛伦茨 | Overflow valve |
| CN201125861Y (en) * | 2007-11-16 | 2008-10-01 | 陕西多伦科技发展有限公司 | Pump head valve |
| CN202228338U (en) * | 2011-08-03 | 2012-05-23 | 新兴重工湖北三六一一机械有限公司 | Porous overflow valve for displacement pump |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2593490B2 (en) * | 1987-11-16 | 1997-03-26 | 日立粉末冶金株式会社 | Relief valve |
| JPH0972457A (en) * | 1995-09-01 | 1997-03-18 | Iseki & Co Ltd | Relief valve |
| JP3172697B2 (en) * | 1997-09-05 | 2001-06-04 | 株式会社アイテック | Water saving valve for flow control on-off cock |
-
2011
- 2011-08-03 CN CN201110220445.7A patent/CN102913437B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2925786A (en) * | 1956-11-23 | 1960-02-23 | Procon Pump & Engineering Co | Pump |
| CN1164271A (en) * | 1993-10-29 | 1997-11-05 | 岚瑟公司 | Relief valve seat for positive displacement pump |
| CN1270663A (en) * | 1997-09-10 | 2000-10-18 | 伯恩特·洛伦茨 | Overflow valve |
| CN201125861Y (en) * | 2007-11-16 | 2008-10-01 | 陕西多伦科技发展有限公司 | Pump head valve |
| CN202228338U (en) * | 2011-08-03 | 2012-05-23 | 新兴重工湖北三六一一机械有限公司 | Porous overflow valve for displacement pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102913437A (en) | 2013-02-06 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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