CN105201950A - Overload overflowing valve for integral multi-way valve - Google Patents
Overload overflowing valve for integral multi-way valve Download PDFInfo
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- CN105201950A CN105201950A CN201510753338.9A CN201510753338A CN105201950A CN 105201950 A CN105201950 A CN 105201950A CN 201510753338 A CN201510753338 A CN 201510753338A CN 105201950 A CN105201950 A CN 105201950A
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Abstract
The invention discloses an overload overflowing valve for an integral multi-way valve, belongs to hydraulic valves and aims at providing an overflow buffering and under-pressure oil supplementing type overload overflowing valve. The overload overflowing valve comprises a valve body; a valve base fixed in a valve cavity is used for separating the valve cavity into a left cavity and a right cavity; the right cavity is internally provided with a movable door; an outer spring is arranged between the movable door and the valve base; a valve sleeve with a low-pressure cavity is fixed on the valve body and is used for sealing the left cavity; the low-pressure cavity is internally provided with a pressure adjusting spring for tightly ejecting a valve element in a valve hole; the valve body is provided with a high-pressure oil hole and a second low-pressure oil hole; the second low-pressure oil hole is communicated with the low-pressure cavity; the movable door (9) is internally provided with a slide rod (14); the slide rod is provided with a first damping hole (15) for communicating the right cavity (17) with the high-pressure oil hole (12); and an inner spring (7) is arranged between the valve base (18) and the slide rod (14). With the adoption of the overload overflowing valve, damping overflow can be realized and the stability can be guaranteed; the overload overflowing valve also has a negative-pressure oil supplementing effect and the system security is guaranteed; and the overload overflowing valve for the integral multi-way valve, disclosed by the invention, is used for an excavator.
Description
Technical field
The present invention relates to a kind of hydrovalve, particularly relate to a kind of overall multi-way valve overload relief valve.
Background technique
Overload relief valve is the engineering machinery main controlling elements such as excavator---the significant components of overall multi-way valve, is mainly used in playing high pressure kicks or repairing when controlling each hydraulic branch maximum pressure of excavator or executive component stopping.At present, the overload relief valve that excavator main control valve adopts opens and closes directly, roughly, easily causes noise and vibration; And only have overload relief function, do not have under-voltage repairing function, system is dangerous.
Summary of the invention
For the above-mentioned defect existed in prior art, the present invention aims to provide a kind ofly the overall multi-way valve of overflow buffering and under-voltage repairing can transship relief valve.
To achieve these goals, the present invention is by the following technical solutions: it comprises the valve body with valve pocket, be fixed in described valve pocket, with the valve seat of valve opening, this valve pocket be divided into left chamber and right chamber, there is valve in described right chamber, between this valve and described valve seat, have outer spring, valve pocket with low-pressure cavity to be fixed on described valve body and to be closed in described left chamber, has spool is held out against the pressure adjusting spring in described valve opening in described low-pressure cavity; Valve body has high pressure hydraulic fluid port and the first low pressure hydraulic fluid port, this first low pressure hydraulic fluid port should be communicated with low-pressure cavity; There is slide bar in valve, this slide bar has the first damping hole being communicated with right chamber and high pressure hydraulic fluid port, between valve seat and slide bar, have inner spring.
Slide bar there is second damping hole in connection first damping hole and right chamber; Between high pressure hydraulic fluid port and valve, there is the differential chamber being controlled aperture by this valve, valve body has the second low pressure hydraulic fluid port that chamber differential with this is communicated with; There is spring seat in low-pressure cavity, valve pocket has and has locking nut by adjusting screw closed for low-pressure cavity, this adjusting screw.
Compared with the prior art, the present invention, owing to have employed technique scheme, adds slide bar, the second damping hole and inner spring, therefore can realize damping overflow, and flooding process can obtain buffering, ensure steadily; The second damping hole increased can make flooding process cushion further; Add the first low pressure hydraulic fluid port be communicated with differential chamber, therefore can open when negative pressure appears in high pressure hydraulic fluid port end, play repairing effect, ensure security of system; Increase adjusting screw and locking nut can carry out position regulation to spring seat, thus the pressure of Regulation spring, play the effect that cracking pressure is adjustable.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: locking nut 1, adjusting screw 2, spring seat 3, valve pocket 4, pressure adjusting spring 5, spool 6, inner spring 7, outer spring 8, valve 9, first low pressure hydraulic fluid port 10, second low pressure hydraulic fluid port 11, low-pressure cavity 12, differential chamber 13, slide bar 14, first damping hole 15, second damping hole 16, hyperbaric chamber 17, valve seat 18, valve body 19, low-pressure cavity 20.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the invention will be further described:
As shown in Figure 1: in valve body 4, have valve pocket, the right-hand member of this valve pocket is the high pressure hydraulic fluid port 12 be connected with overall multi-way valve (not shown); Be fixed with the valve seat 18 of band valve opening in described valve pocket, valve pocket is divided into left chamber and right chamber by this valve seat.There is valve 9 in described right chamber, between this valve and valve seat 18, have outer spring 8; Described left chamber envelope is closed by the valve pocket 4 be fixed on valve body 19, and there is low-pressure cavity 20 this valve pocket inside, has spool 6 is held out against the pressure adjusting spring 5 in described valve opening in this low-pressure cavity; Valve body 19 there is the first low pressure hydraulic fluid port 10 be communicated with low-pressure cavity 20.There is slide bar 14 valve 9 inside, and there is the first damping hole 15 being communicated with right chamber 17 and high pressure hydraulic fluid port 12 this slide bar inside, has inner spring 7 between valve seat 18 and slide bar 14.
In order to ensure that flooding process is steady, avoid impacting, slide bar 14 there is second damping hole 16 in connection first damping hole 15 and right chamber 17.
In order to improve the reliability of steady overflow, the differential chamber 13 being controlled aperture by this valve is had between high pressure hydraulic fluid port 12 and valve 9, valve body 19 has the second low pressure hydraulic fluid port 11 that chamber differential with this is communicated with, this second low pressure hydraulic fluid port is communicated with low service system (not shown).
For the ease of the pressure of regulating system, in low-pressure cavity 20, there is spring seat 3, valve pocket 4 has and has locking nut 1 by adjusting screw 2 closed for low-pressure cavity 20, this adjusting screw.
Working principle:
When high pressure hydraulic fluid port 12 oil pressure is normal, hyperbaric chamber 17 is isobaric with it; Now the pressure oil pressure acted on spool 6 is less than the elastic force of pressure adjusting spring 5, and spool 6 is in closed condition; Therefore, valve 9 is also in closed condition, without off-load, is in normal working.
When the hyperbaric chamber 17 pressure oil pressure acted on spool 6 is greater than the elastic force of pressure adjusting spring 5, spool 6 is opened, and the pressure oil of hyperbaric chamber 17 unloads back low-pressure cavity 20 by valve opening.High pressure hydraulic fluid port 12 carries out repairing by the first damping hole 15, second damping hole 16 pairs of hyperbaric chambers 17 on the one hand, to prevent from impacting; On the other hand because high pressure hydraulic fluid port 12 and hyperbaric chamber 17 produce pressure reduction, the elastic force that slide bar 14 overcomes inner spring 7 under the effect of hydraulic coupling is moved to the left to and contacts with spool 6, and blocks the first damping hole 15; Therefore, high pressure hydraulic fluid port 12 and hyperbaric chamber 17 pressure reduction expand further, and the elastic force that valve 9 overcomes outer spring 8 is opened left, and a large amount of high pressure oil of high pressure hydraulic fluid port 12 by valve 9 aperture, unload back low service system by the second low pressure hydraulic fluid port 11 again, avoids system pressure too high.
When the pressure in hyperbaric chamber 17 is less than the elastic force of pressure adjusting spring 5, spool 6 is closed, and hyperbaric chamber 17 is enclosed cavity, and its pressure equals high pressure hydraulic fluid port 12 pressure; Slide bar 14 and valve 9 are closed under the effect of inner spring 7, outer spring 8, high pressure hydraulic fluid port 12 with comprise the first low pressure hydraulic fluid port 10, second low pressure hydraulic fluid port 11, the low service system of low-pressure cavity 20 thoroughly disconnects.
When high pressure hydraulic fluid port 12 produces negative pressure (high pressure hydraulic fluid port 12 pressure is less than the pressure of low service system), the fluid of low service system enters differential chamber 13 by the second low pressure hydraulic fluid port 11, the hydraulic coupling acted on valve 9 annulus area overcomes inner spring 7, the elastic force of outer spring 8 opens valve 9 left, the fluid of low service system supplements to high pressure hydraulic fluid port 12, avoids high pressure hydraulic fluid port 12 to produce negative pressure.
Claims (4)
1. an overall multi-way valve overload relief valve, comprise the valve body with valve pocket, be fixed in described valve pocket, with the valve seat of valve opening, this valve pocket be divided into left chamber and right chamber, there is valve in described right chamber, between this valve and described valve seat, have outer spring, valve pocket with low-pressure cavity to be fixed on described valve body and to be closed in described left chamber, has spool is held out against the pressure adjusting spring in described valve opening in described low-pressure cavity; Valve body has high pressure hydraulic fluid port and the first low pressure hydraulic fluid port, this first low pressure hydraulic fluid port should be communicated with low-pressure cavity; It is characterized in that: in valve (9), have slide bar (14) this slide bar having and is communicated with right chamber (17) and first damping hole (15) of high pressure hydraulic fluid port (12), between valve seat (18) and slide bar (14), have inner spring (7).
2. overall multi-way valve overload relief valve according to claim 1, is characterized in that: the second damping hole (16) slide bar (14) having connection first damping hole (15) and right chamber (17).
3. overall multi-way valve overload relief valve according to claim 2, it is characterized in that: between high pressure hydraulic fluid port (12) and valve (9), have the differential chamber (13) being controlled aperture by this valve, the second low pressure hydraulic fluid port (11) valve body (19) having chamber differential with this be communicated with.
4. the overall multi-way valve overload relief valve according to claim 1 or 2 or 3, it is characterized in that: in low-pressure cavity (20), have spring seat (3) valve pocket (4) having and has locking nut (1) by adjusting screw (2) closed for low-pressure cavity (20), this adjusting screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510753338.9A CN105201950A (en) | 2015-11-09 | 2015-11-09 | Overload overflowing valve for integral multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510753338.9A CN105201950A (en) | 2015-11-09 | 2015-11-09 | Overload overflowing valve for integral multi-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105201950A true CN105201950A (en) | 2015-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510753338.9A Pending CN105201950A (en) | 2015-11-09 | 2015-11-09 | Overload overflowing valve for integral multi-way valve |
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| CN (1) | CN105201950A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697443A (en) * | 2016-04-29 | 2016-06-22 | 张作玮 | Pressure reducing valve |
| CN106224607A (en) * | 2016-09-26 | 2016-12-14 | 东洋重工机（大连）有限公司 | A kind of screw thread high pressure inserted valve |
| CN107559257A (en) * | 2017-09-11 | 2018-01-09 | 雷沃重工股份有限公司 | A kind of overflow valve |
| CN111094761A (en) * | 2018-01-31 | 2020-05-01 | Ｋｙｂ株式会社 | Valve device |
| WO2022241586A1 (en) * | 2021-05-16 | 2022-11-24 | 浙江吉利控股集团有限公司 | Hydraulic control valve, hydraulic control system and transmission |
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|---|---|---|---|---|
| CN201487331U (en) * | 2009-09-04 | 2010-05-26 | 宁波海宏液压有限公司 | Overloading oil filling valve for multiway valve |
| CN202500847U (en) * | 2012-02-29 | 2012-10-24 | 泸州国邦机械有限公司 | Overload valve |
| US20120305108A1 (en) * | 2009-11-17 | 2012-12-06 | Robert Bosch Gmbh | Pilot-Operated Pressure Control Valve |
| CN202597816U (en) * | 2012-05-14 | 2012-12-12 | 宁波海宏液压有限公司 | Overload oil-supplement valve |
| CN103075382A (en) * | 2013-02-04 | 2013-05-01 | 陕西航天动力高科技股份有限公司 | Compact overload oil supplementation valve with variable damping force |
| CN103206423A (en) * | 2013-04-17 | 2013-07-17 | 三一重机有限公司 | Hydraulic system and engineering machine |
| CN204127040U (en) * | 2014-09-01 | 2015-01-28 | 泸州国邦机械有限公司 | High-pressure high-flow overload valve |
| CN205371125U (en) * | 2015-11-09 | 2016-07-06 | 贵州枫阳液压有限责任公司 | Whole multiple unit valve is with transshipping overflow valve |
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2015
- 2015-11-09 CN CN201510753338.9A patent/CN105201950A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201487331U (en) * | 2009-09-04 | 2010-05-26 | 宁波海宏液压有限公司 | Overloading oil filling valve for multiway valve |
| US20120305108A1 (en) * | 2009-11-17 | 2012-12-06 | Robert Bosch Gmbh | Pilot-Operated Pressure Control Valve |
| CN202500847U (en) * | 2012-02-29 | 2012-10-24 | 泸州国邦机械有限公司 | Overload valve |
| CN202597816U (en) * | 2012-05-14 | 2012-12-12 | 宁波海宏液压有限公司 | Overload oil-supplement valve |
| CN103075382A (en) * | 2013-02-04 | 2013-05-01 | 陕西航天动力高科技股份有限公司 | Compact overload oil supplementation valve with variable damping force |
| CN103206423A (en) * | 2013-04-17 | 2013-07-17 | 三一重机有限公司 | Hydraulic system and engineering machine |
| CN204127040U (en) * | 2014-09-01 | 2015-01-28 | 泸州国邦机械有限公司 | High-pressure high-flow overload valve |
| CN205371125U (en) * | 2015-11-09 | 2016-07-06 | 贵州枫阳液压有限责任公司 | Whole multiple unit valve is with transshipping overflow valve |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697443A (en) * | 2016-04-29 | 2016-06-22 | 张作玮 | Pressure reducing valve |
| CN106224607A (en) * | 2016-09-26 | 2016-12-14 | 东洋重工机（大连）有限公司 | A kind of screw thread high pressure inserted valve |
| CN107559257A (en) * | 2017-09-11 | 2018-01-09 | 雷沃重工股份有限公司 | A kind of overflow valve |
| CN111094761A (en) * | 2018-01-31 | 2020-05-01 | Ｋｙｂ株式会社 | Valve device |
| CN111094761B (en) * | 2018-01-31 | 2022-03-15 | Ｋｙｂ株式会社 | Valve device |
| WO2022241586A1 (en) * | 2021-05-16 | 2022-11-24 | 浙江吉利控股集团有限公司 | Hydraulic control valve, hydraulic control system and transmission |
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Application publication date: 20151230 |
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