CN203257779U - Pilot-operated type proportional overflow valve - Google Patents
Pilot-operated type proportional overflow valve Download PDFInfo
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- CN203257779U CN203257779U CN 201320239327 CN201320239327U CN203257779U CN 203257779 U CN203257779 U CN 203257779U CN 201320239327 CN201320239327 CN 201320239327 CN 201320239327 U CN201320239327 U CN 201320239327U CN 203257779 U CN203257779 U CN 203257779U
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- valve
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- hole
- spool
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Abstract
The utility model relates to a pilot-operated type proportional overflow valve. The pilot-operated type proportional overflow valve comprises a valve body, a valve plug assembly, a pilot-operated cone valve plug, a proportion electromagnet, a washer, a nut, a protection cover, an electromagnet plug protection cover and a flush-end slotted set screw. The valve plug assembly comprises a valve sleeve, a valve plug, a valve seat, a pressure spring, an O-shaped seal ring, a check ring and a damper, wherein the valve plug is provided with a radial through hole communicated with a bottom hole of a threaded hole in the valve plug. According to the pilot-operated type proportional overflow valve, a radial hole in the valve plug in the valve plug assembly is improved and changed into a through hole from an original unilateral hole, therefore, the capacity of the valve plug for line drilling at the time of machining is improved, a part can be cleaned and deburred beneficially, the difficulty of machining the part is reduced, the stress of the valve plug in the circumferential direction is balanced, and the quality stability of the pilot-operated type proportional overflow valve is improved.
Description
Technical field
The utility model relates to a kind of pilot-operated proportional relief valve, particularly relates to a kind ofly having simple processing and cleaning deburring, thereby reduces pressure oscillation, the pilot-operated proportional relief valve of the new structure that ensures product quality stability.
Background technique
See also Fig. 1, Fig. 2 and shown in Figure 3, Fig. 1 is the sectional view of existing a kind of pilot-operated proportional relief valve, and Fig. 2 is the sectional view of the mangetic core assembly of pilot-operated proportional relief valve among Fig. 1.Fig. 3 is the partial sectional view of the spool of pilot-operated proportional relief valve.Existing a kind of pilot-operated proportional relief valve mainly is comprised of valve body 1, mangetic core assembly 2, pilot poppet valve core 3, proportion electro-magnet 4, packing ring 5, nut 6, safety cover 7, electromagnet plug safety cover 8, base plate O shape circle 9, O-ring seals 10 and flush end fluting Cock screw 13.Wherein mangetic core assembly 2 comprises: valve pocket 21, spool 22, valve seat 23, pressure spring 24, O-ring seals 25, back-up ring 26, damper 27, O-ring seals 28 and back-up ring 29.
As shown in Figure 3, spool 22 be provided with spool 22 on the unilaterally connected diameter of bottom outlet of tapped hole 221 be the radial hole 222 of 2mm, damper 27 is in the tapped hole 221 that is arranged on the spool 22.This diameter be 2mm radial hole 222 processing in, the delivery ratio of drilling the difficulty.In addition, because the aperture of radial hole 222 is smaller, the cleaning deburring of its postorder is also relatively difficult.And the fine finishing process at postorder also exists the problem that the burr iron filings are not easy to discharge.Because pressure controlled valve is relatively more responsive to burr, in case slightly jagged in the valve, for fitting surface, will reduce its matching gap, thereby cause pressure oscillation, affect its pressure stability; And the single face hole also causes spool circumferencial direction unbalance stress easily, so also causes easily pressure oscillation, finally affects the mass stability of product.
This shows that above-mentioned existing pilot-operated proportional relief valve obviously still has inconvenience and defective, and demands urgently further being improved in structural design and processing.In view of this, the design people is based on being engaged in for many years abundant practical experience and professional knowledge of this type of product specification manufacturing, and the utilization of cooperation scientific principle, positive research and innovation in addition, through constantly research, design, and through after repeatedly studying sample and improvement, finally create the utility model that has practical value.
Summary of the invention
The purpose of this utility model is, overcome the defective that existing pilot-operated proportional relief valve exists, and provide a kind of pilot-operated proportional relief valve of new structure, technical problem to be solved is to make it by improving the radial hole on the spool in the mangetic core assembly, can reduce its processing and clean the deburring difficulty, reduce workman's work, improve the mass stability of product, be very suitable for practicality.
The purpose of this utility model and to solve its technical problem be to adopt following technological scheme to realize.According to a kind of pilot-operated proportional relief valve that the utility model proposes, it comprises: valve body, mangetic core assembly, pilot poppet valve core, proportion electro-magnet, packing ring, nut, safety cover, electromagnet plug safety cover and flush end fluting Cock screw; Wherein said mangetic core assembly comprises valve pocket, spool, valve seat, pressure spring, O RunddichtringO, back-up ring and damper; Wherein, described spool is arranged in the main aperture of described valve pocket, is provided with tapped hole at an end of described spool, is provided with described damper in the described tapped hole of described spool; Described valve seat is arranged at an end of described valve pocket, and an end of described valve seat is positioned at the main aperture of described valve pocket, and the other end then stretches out outside the described valve pocket; Be provided with at described valve seat and described spool between the end of described tapped hole and be provided with described pressure spring; Be respectively equipped with described O RunddichtringO and described back-up ring between the main aperture of described valve seat and described valve pocket and in the seal groove on the described valve pocket outer surface; Be provided with the radial direction through hole that is communicated with the bottom outlet of tapped hole on the described spool at described spool.
The purpose of this utility model and solve its technical problem and can also be further achieved by the following technical measures.
Aforesaid pilot-operated proportional relief valve, the diameter of wherein said radial direction through hole are 1.4mm.
Aforesaid pilot-operated proportional relief valve, wherein said radial direction through hole are communicated with the main aperture of described valve pocket and the described tapped hole on the described spool.
Aforesaid pilot-operated proportional relief valve, wherein said mangetic core assembly are arranged in the main aperture of described valve body; Described pilot poppet valve core is arranged in the main aperture of described valve body, and cooperates with described valve seat with the conical surface of one end; Described proportion electro-magnet is arranged at an end of described valve body, and cooperates with the other end of described pilot poppet valve core; Described electromagnet plug safety cover is arranged at a side of described proportion electro-magnet; The other end of described valve pocket stretches out outside the main aperture of described valve body, and its outer surface is provided with outside thread; Described nut and described outside thread are equipped with on described valve pocket; Described packing ring is arranged on the described valve pocket, and between the end face of described nut and the described valve body the other end; Described safety cover is arranged at the outside of the other end and the described nut of described valve pocket.
Aforesaid pilot-operated proportional relief valve wherein is provided with the O RunddichtringO between described proportion electro-magnet and described valve body.
Aforesaid pilot-operated proportional relief valve wherein also is provided with filler opening, return opening and effluxes the leakage hydraulic fluid port on described valve body; Between the main aperture of described valve body and described valve pocket, form respectively oil suction chamber and the oil back chamber of space; Described filler opening is communicated with described oil suction chamber, and described return opening is communicated with described oil back chamber; Be provided with the first through hole of the main aperture that is communicated with described oil suction chamber and described valve pocket at described valve pocket, and be communicated with the second through hole of the main aperture of described oil back chamber and described valve pocket; Described return opening and the described leakage hydraulic fluid port that effluxes are communicated with the oil pocket at described pilot poppet valve core place respectively; And be provided with the first tapped hole at described return opening with the passage place that the oil pocket at described pilot poppet valve core place is communicated with, be provided with the second tapped hole at the described leakage hydraulic fluid port that effluxes with the passage place that the oil pocket at described pilot poppet valve core place is communicated with, in described the first tapped hole and described the second tapped hole, can select to arrange described flush end fluting Cock screw according to different oil extraction modes.
Aforesaid pilot-operated proportional relief valve wherein is respectively equipped with base plate O RunddichtringO at described filler opening, described return opening and the described leakage oil port that effluxes.
The utility model compared with prior art has obvious advantage and beneficial effect.By technique scheme, a kind of pilot-operated proportional relief valve of the utility model has following advantages and beneficial effect at least:
1, pilot-operated proportional relief valve of the present utility model is on the basis of existing technology, with on the spool in the original valve core assembly with spool on the unilaterally connected radial hole of thread Pilot hole change radial direction through hole into, reduced difficulty of processing.When boring, can make the discharge of drilling become relatively easy.When anti-clearly, owing to change through hole into, the air-flow of high pressure air rifle and cleaning solution are removed the burr drilling totally by this through hole.When grinding, also be difficult for causing abrasive dust to remain in herein.Reduce the possibility of Yin Maoci drilling build-up of pressure runout, improved the mass stability of product.
2, pilot-operated proportional relief valve of the present utility model by with on the spool with spool on the unilaterally connected radial hole of thread Pilot hole change radial direction through hole into, so that spool circumferencial direction stress balance, avoided the pressure oscillation because caused by force unbalance, reduce the possibility because of unbalance stress build-up of pressure runout, improved the mass stability of product.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of specification, and for above and other purpose of the present utility model, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and the cooperation accompanying drawing, be described in detail as follows.
Description of drawings
Fig. 1 is the sectional view of existing a kind of pilot-operated proportional relief valve.
Fig. 2 is the sectional view of the mangetic core assembly of pilot-operated proportional relief valve among Fig. 1.
Fig. 3 is the partial sectional view of the spool of pilot-operated proportional relief valve.
Fig. 4 is the sectional view of a kind of pilot-operated proportional relief valve of the utility model preferred embodiment.
Fig. 5 is the sectional view of mangetic core assembly of a kind of pilot-operated proportional relief valve of the utility model preferred embodiment.
Fig. 6 is the partial sectional view of spool of a kind of pilot-operated proportional relief valve of the utility model preferred embodiment.
1: valve body 2: mangetic core assembly
3: pilot poppet valve core 4: proportion electro-magnet
5: packing ring 6: nut
7: safety cover 8: electromagnet plug safety cover
9: base plate O shape circle 10:O shape circle
12: the second tapped holes of 11: the first tapped holes
13: flush end fluting Cock screw 21: valve pocket
22: spool 23: valve seat
24: pressure spring 25:O shape circle
26: back-up ring 27: damper
28:O shape circle 29: back-up ring
212: the second through holes of 211: the first through holes
221: tapped hole 222: radial hole
223: radial direction through hole
Embodiment
Be to reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the utility model, below in conjunction with accompanying drawing and preferred embodiment, to according to its embodiment of a kind of pilot-operated proportional relief valve, structure, feature and the effect thereof that the utility model proposes, be described in detail as follows.
Relevant aforementioned and other technology contents of the present utility model, Characteristic can clearly present in the following detailed description that cooperates with reference to graphic preferred embodiment.Explanation by embodiment, should be to reach technological means and the effect that predetermined purpose takes to obtain one more deeply and concrete understanding to the utility model, yet appended graphic only provide with reference to the usefulness of explanation, the utility model is limited.
See also Fig. 4, Fig. 5 and shown in Figure 6, Fig. 4 is the sectional view of a kind of pilot-operated proportional relief valve of the utility model preferred embodiment.Fig. 5 is the sectional view of mangetic core assembly of a kind of pilot-operated proportional relief valve of the utility model preferred embodiment.Fig. 6 is the partial sectional view of spool of a kind of pilot-operated proportional relief valve of the utility model preferred embodiment.A kind of pilot-operated proportional relief valve of the utility model preferred embodiment comprises: valve body 1, mangetic core assembly 2, pilot poppet valve core 3, proportion electro-magnet 4, packing ring 5, nut 6, safety cover 7, electromagnet plug safety cover 8 and flush end fluting Cock screw 13.Wherein mangetic core assembly 2 comprises: valve pocket 21, spool 22, valve seat 23, pressure spring 24, O RunddichtringO 25, back-up ring 26, damper 27, O RunddichtringO 28, back-up ring 29.Wherein, spool 22 is arranged in the main aperture of valve pocket 21, is provided with tapped hole 221 at an end of spool 22, is provided with damper 27 in the tapped hole 221 of spool 22.Valve seat 23 is arranged at an end of valve pocket 21, and an end of valve seat 23 is positioned at the main aperture of valve pocket 21, and the other end then stretches out outside the valve pocket 21.Be provided with at valve seat 23 and spool 22 between the end of tapped hole 221 and be provided with pressure spring 24.Be respectively equipped with O RunddichtringO 25,28 and back-up ring 26,29 between the main aperture of valve seat 23 and valve pocket 21 and in the seal groove on valve pocket 21 outer surfaces.Also be provided with the radial direction through hole 223 that is communicated with the bottom outlet of tapped hole 221 on the spool 22 on the spool 22.
In one embodiment, when arrange on the existing pilot-operated proportional relief valve core with spool 22 on the diameter D=2mm of the unilaterally connected radial hole 222 of bottom outlet of tapped hole 221 time, according to formula 1
π D
2/ 4=π d
2/ 4*2 (formula 1)
Push away to get the diameter d=1.4mm of radial direction through hole 223.
Radial direction through hole 223 of the present utility model is communicated with main aperture and the tapped hole 221 of valve pocket 21.
As shown in Figure 4, the mangetic core assembly 2 of pilot-operated proportional relief valve of the present utility model is arranged in the main aperture of valve body 1.Pilot poppet valve core 3 is arranged in the main aperture of valve body 1, and cooperates with valve seat 23 with the conical surface of one end.Proportion electro-magnet 4 is arranged at an end of valve body 1, and cooperates with the other end of pilot poppet valve core 3.Electromagnet plug safety cover 8 is arranged at a side of proportion electro-magnet 4.The other end of valve pocket 21 stretches out outside the main aperture of valve body 1, and its outer surface is provided with outside thread.Nut 6 is equipped with on valve pocket 21 with this outside thread.Packing ring 5 is arranged on the valve pocket 21, and between the end face of nut 6 and valve body 1 the other end.Safety cover 7 is arranged at the outside of the other end and the nut 6 of valve pocket 21.Between proportion electro-magnet 4 and valve body 1, be provided with O RunddichtringO 10.The utility model also is provided with oil inlet P, oil return inlet T and effluxes and leaks hydraulic fluid port A(Y on valve body 1).Between the main aperture of valve body 1 and valve pocket 21, form respectively oil suction chamber and the oil back chamber of space.Wherein oil inlet P is communicated with oil suction chamber, and oil return inlet T is communicated with oil back chamber.On valve pocket 21, also be provided with the first through hole 211 of the main aperture that is communicated with oil suction chamber and valve pocket 21, and be communicated with the second through hole 212 of the main aperture of oil back chamber and valve pocket 21.Oil return inlet T and efflux leak hydraulic fluid port A(Y) respectively the oil pocket with pilot poppet valve core 3 places be communicated with, and be provided with the first tapped hole 11 in oil return inlet T with the passage place that the oil pocket at pilot poppet valve core 3 places is communicated with, drain outside oil leakaging port A(Y) the passage place that is communicated with the oil pocket at pilot poppet valve core 3 places is provided with the second tapped hole 12, can select to arrange flush end fluting Cock screw 13 according to different oil extraction modes in the first tapped hole 11 and the second tapped hole 12.In oil inlet P, oil return inlet T and efflux leak hydraulic fluid port A(Y) locate also to be respectively equipped with base plate O RunddichtringO 9.
Pilot-operated proportional relief valve of the present utility model is passing ratio electromagnet 4 initialization system pressure, when the pressure adjoint system pressure at oil inlet P place raises, act on the spool 22, simultaneously, the pressure of system can act on the spring loading surface of spool 22 by damper 27.Act on again the thrust that produces after 4 energisings of balanced proportions electromagnet on the pilot poppet valve core 3 by damper 27 system pressures.When system pressure continuation rising reached predefined value, pilot poppet valve core 3 lifted off a seat 23.Like this according to different control oil mode, fluid just can be by effluxing leakage hydraulic fluid port A(Y) efflux or by being discharged to fuel tank in the oil return inlet T.Wherein be screwed into the flush end fluting Cock screw 13 that outside thread scribbles happy safe glue in the first tapped hole 11 by the passage place that is communicated with the oil pocket at pilot poppet valve core 3 places in oil return inlet T, oil return inlet T is blocked with the passage that the oil pocket at pilot poppet valve core 3 places is communicated with, and fluid leaks hydraulic fluid port A(Y by pilot poppet valve core 3 by effluxing) efflux.By draining outside oil leakaging port A(Y) be screwed into the flush end fluting Cock screw 13 that scribbles happy safe glue on the outside thread in second tapped hole 12 at the passage place that is communicated with the oil pocket at pilot poppet valve core 3 places, can make to efflux and leak hydraulic fluid port A(Y) passage that is communicated with the oil pocket at pilot poppet valve core 3 places is blocked, fluid by pilot poppet valve core 3 by arranging in the oil return inlet T.If system pressure continue to increase, spool 22 under High Pressure, will move to right arrive control oil by the oil inlet P overflow to oil return inlet T.
Pilot-operated proportional relief valve of the present utility model by improving spool 22 radial direction oil hole design types, is that the monolateral radial hole of 2mm changes the radial direction through hole 223 that diameter is 1.4mm into by diameter.Thereby when this radial hole of processing, will bore monolateral radial hole 222 and change brill radial direction through hole 223 into, reduced the difficulty of processing of part, and the part drilling will drop out by radial direction through hole 223 in boring.After boring, when part is cleaned deburring, can clear up through hole 223 radially with the air-flow of high pressure air rifle and cleaning solution.Owing to adopted the design type of radial direction through hole 223 at spool 22, so drilling cuttings and burr are easy to clean out.After grinding, when again cleaning deburring, be not easy to stay residue in the radial direction through hole 223 of spool 22.Finally reduce burr to the harmful effect that product performance cause, avoided the Yin Maoci pressure oscillation that produces and the pressure oscillation that caused by force unbalance because of asymmetric hole.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, although the utility model discloses as above with preferred embodiment, yet be not to limit the utility model, any those skilled in the art are not within breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, any simple modification that foundation technical spirit of the present utility model is done above embodiment, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.
Claims (7)
1. pilot-operated proportional relief valve, it comprises: valve body, mangetic core assembly, pilot poppet valve core, proportion electro-magnet, packing ring, nut, safety cover, electromagnet plug safety cover and flush end fluting Cock screw; Wherein said mangetic core assembly comprises valve pocket, spool, valve seat, pressure spring, O RunddichtringO, back-up ring and damper; Wherein, described spool is arranged in the main aperture of described valve pocket, is provided with tapped hole at an end of described spool, is provided with described damper in the described tapped hole of described spool; Described valve seat is arranged at an end of described valve pocket, and an end of described valve seat is positioned at the main aperture of described valve pocket, and the other end then stretches out outside the described valve pocket; Be provided with at described valve seat and described spool between the end of described tapped hole and be provided with described pressure spring; Be respectively equipped with described O RunddichtringO and described back-up ring between the main aperture of described valve seat and described valve pocket and in the seal groove on the described valve pocket outer surface; It is characterized in that:
Be provided with the radial direction through hole that is communicated with the bottom outlet of tapped hole on the described spool at described spool.
2. pilot-operated proportional relief valve according to claim 1, the diameter that it is characterized in that wherein said radial direction through hole is 1.4mm.
3. pilot-operated proportional relief valve according to claim 1 is characterized in that wherein said radial direction through hole is communicated with the main aperture of described valve pocket and the described tapped hole on the described spool.
4. the described pilot-operated proportional relief valve of arbitrary claim in 3 according to claim 1 is characterized in that wherein said mangetic core assembly is arranged in the main aperture of described valve body; Described pilot poppet valve core is arranged in the main aperture of described valve body, and cooperates with described valve seat with the conical surface of one end; Described proportion electro-magnet is arranged at an end of described valve body, and cooperates with the other end of described pilot poppet valve core; Described electromagnet plug safety cover is arranged at a side of described proportion electro-magnet; The other end of described valve pocket stretches out outside the main aperture of described valve body, and its outer surface is provided with outside thread; Described nut and described outside thread are equipped with on described valve pocket; Described packing ring is arranged on the described valve pocket, and between the end face of described nut and the described valve body the other end; Described safety cover is arranged at the outside of the other end and the described nut of described valve pocket.
5. pilot-operated proportional relief valve according to claim 4 is characterized in that wherein being provided with the O RunddichtringO between described proportion electro-magnet and described valve body.
6. pilot-operated proportional relief valve according to claim 4 is characterized in that wherein also being provided with filler opening, return opening and effluxing the leakage hydraulic fluid port on described valve body; Between the main aperture of described valve body and described valve pocket, form respectively oil suction chamber and the oil back chamber of space; Described filler opening is communicated with described oil suction chamber, and described return opening is communicated with described oil back chamber; Be provided with the first through hole of the main aperture that is communicated with described oil suction chamber and described valve pocket at described valve pocket, and be communicated with the second through hole of the main aperture of described oil back chamber and described valve pocket; Described return opening and the described leakage hydraulic fluid port that effluxes are communicated with the oil pocket at described pilot poppet valve core place respectively; And be provided with the first tapped hole at described return opening with the passage place that the oil pocket at described pilot poppet valve core place is communicated with, be provided with the second tapped hole at the described leakage hydraulic fluid port that effluxes with the passage place that the oil pocket at described pilot poppet valve core place is communicated with, in described the first tapped hole and described the second tapped hole, can select to arrange described flush end fluting Cock screw according to different oil extraction modes.
7. pilot-operated proportional relief valve according to claim 6 is characterized in that wherein being respectively equipped with base plate O RunddichtringO at described filler opening, described return opening and the described leakage oil port that effluxes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320239327 CN203257779U (en) | 2013-05-06 | 2013-05-06 | Pilot-operated type proportional overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320239327 CN203257779U (en) | 2013-05-06 | 2013-05-06 | Pilot-operated type proportional overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203257779U true CN203257779U (en) | 2013-10-30 |
Family
ID=49470348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320239327 Expired - Lifetime CN203257779U (en) | 2013-05-06 | 2013-05-06 | Pilot-operated type proportional overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203257779U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728506A (en) * | 2015-03-24 | 2015-06-24 | 上海大学 | Digital pilot-operated cartridge overflow valve |
| CN113719491A (en) * | 2021-09-03 | 2021-11-30 | 宁波海宏液压有限公司 | Combined load control valve stable in use |
-
2013
- 2013-05-06 CN CN 201320239327 patent/CN203257779U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728506A (en) * | 2015-03-24 | 2015-06-24 | 上海大学 | Digital pilot-operated cartridge overflow valve |
| CN113719491A (en) * | 2021-09-03 | 2021-11-30 | 宁波海宏液压有限公司 | Combined load control valve stable in use |
| CN113719491B (en) * | 2021-09-03 | 2023-12-15 | 宁波海宏液压有限公司 | Use stable combination load control valve |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |
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| CX01 | Expiry of patent term |