CN103318801A - Quick oil inletting and slow oil returning valve structure for lifting tools - Google Patents
Quick oil inletting and slow oil returning valve structure for lifting tools Download PDFInfo
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- CN103318801A CN103318801A CN2013102658783A CN201310265878A CN103318801A CN 103318801 A CN103318801 A CN 103318801A CN 2013102658783 A CN2013102658783 A CN 2013102658783A CN 201310265878 A CN201310265878 A CN 201310265878A CN 103318801 A CN103318801 A CN 103318801A
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Abstract
The invention belongs to the technical field of hydraulic lifting devices, and relates to a quick oil inletting and slow oil returning valve structure for lifting tools. The quick oil inletting and slow oil returning valve structure comprises a valve seat, a valve limiting rod, a valve and a spring, a first sealing face and a second sealing face are formed on the surface, facing to one side of the valve, of the valve seat, an oil inletting and returning concave passage is formed between the first sealing face and the second sealing face, a group of oil inletting and returning holes are formed in the valve seat, a spring supporting cavity is formed at the center of the valve seat, the valve limiting rod is fixed at the center of the valve seat, the valve is sleeved on the valve limiting rod, a slow oil returning hole is formed in the valve, the spring is sleeved on the valve limiting rod, the upper end of the spring is supported on the valve, and the lower end of the spring is supported on the bottom wall of the spring supporting cavity. Lifted objects are protected, and a piston rod is prevented from being damaged; when oil is pumped to a cylinder cavity of an oil cylinder, oil enters from the group of oil inletting and returning holes in the valve seat, the valve is jacked up to be away from the first and second sealing faces, and the oil rapidly enters the oil cavity of the oil cylinder from the oil inletting and returning concave passage to enable the piston rod to be lifted up quickly.
Description
Technical field
The invention belongs to hydraulic lifting device technique field, be specifically related to the slow oil returning valve structure of fast oil-feed that a kind of lifting implement is used.
Background technology
Above mentioned lifting implement mainly refers to but is not limited to refer to jack and the vertical top of transporting.Be example with the jack, its structure and principle of work all are known, and in order to improve operating efficiency, when the oil of pump in oil cylinder, the piston that common hope is positioned at the cylinder chamber of oil cylinder stretches outside the cylinder chamber rapidly, in order to, suitably increased so will be opened in diameter on the base and oil inlet and oil return road that communicate with the cylinder chamber of oil cylinder the quick lifting of weight by piston end.But facts have proved that there is the problem of attending to one thing and lose sight of another in this mentality of designing, this refers to so-called Gu to satisfy the quick lifting of piston rod and uses raising to the lifting speed of weight, that refers to so-called mistake when oil return when piston rod bounces back in the cylinder body cylinder chamber, since before by the piston rod lifting the effect of weight, the phenomenon that piston rod can occur replying suddenly, so not only there is the anxiety that undermines weight, but also be attended by the dangerous of operation and damage jack, because descending suddenly, piston rod very likely cause when (contracting is to the cylinder chamber) the weight resilience to be fallen and piston rod is hit and damages.
The problems referred to above suffer from industry for a long time and expectation solves, but there is no all enlightenments that is solved this technical problem in disclosed Chinese patent literature and the non-patent literature up to now, for this reason, the applicant has done useful design, formed technical scheme described below, and taking to the experiment proved that it is practicable under the secrecy provision.
Summary of the invention
Task of the present invention is to provide a kind of and can controls oil return speed and use and ensure that piston rod low replys and avoid undermining the slow oil returning valve structure of being used by the lifting implement of the weight of lifting and protection piston rod of fast oil-feed in the cylinder chamber of oil cylinder when pressure release.
Task of the present invention is finished like this, the slow oil returning valve structure of fast oil-feed that a kind of lifting implement is used, comprise valve seat, the valve position-limited lever, valve and spring, on valve seat and towards a side surface of valve, constitute primary sealing area and secondary sealing area, this first, constitute the recessed road of an oil inlet and oil return between the secondary sealing area, on valve seat and offer one group of top from valve seat around the circumferencial direction of valve seat with the interval state and connect oil inlet and oil return hole to the bottom, each oil inlet and oil return hole is corresponding with the recessed road of described oil inlet and oil return and communicate with the recessed road of oil inlet and oil return, constitute a spring-loaded chamber in the central authorities of valve seat and towards a side of valve, the valve position-limited lever is fixed on the middle position of valve seat, valve is nested with on the valve position-limited lever with quick condition, and match with described primary sealing area and secondary sealing area simultaneously, on this valve and in the position corresponding to the recessed road of described oil inlet and oil return, offer a side from the thickness direction of valve and connect a fuel return hole at a slow speed to opposite side, spring is nested with on the valve position-limited lever, and be positioned at the spring-loaded chamber, the upper end of this spring is bearing on the valve, and the lower end is bearing on the chamber diapire in spring-loaded chamber, wherein: when spring elongation and during the jack-up valve, valve leaves described primary sealing area and secondary sealing area, open on the top in the recessed road of described oil inlet and oil return, and when spring compresses, valve contacts with primary sealing area and secondary sealing area, the top sealing in the recessed road of oil inlet and oil return.
In a specific embodiment of the present invention, on described valve seat and the middle position that is positioned at described spring-loaded chamber offer a valve position-limited lever resigning hole, the lower end of described valve position-limited lever is passed this valve position-limited lever resigning hole and is limited by nut, and the upper end of valve position-limited lever leans out described valve and be resisted against valve back to a side of described valve seat.
In another specific embodiment of the present invention, constitute a pressure cap in the described upper end of described valve position-limited lever, this pressure cap is resisted against described valve back to a side of described valve seat.
In another specific embodiment of the present invention, described spring is coil spring.
Technical scheme provided by the invention is when pressure release, because spring compression, valve contacts with first, second sealing surface, pressure oil can only enter the oil inlet and oil return hole through the recessed road of oil inlet and oil return from fuel return hole at a slow speed, thereby can make the piston rod of lifting implement low descending, not only can protect by the object of lifting, and can avoid damaging piston rod; When oily to the cylinder chamber pump of oil cylinder, fluid enters from one group of oil inlet and oil return hole on the valve seat, and jack-up valve under pressure and under the restoring force effect of spring, make valve leave first, second sealing surface, fluid enters the cylinder chamber of oil cylinder fast from the recessed road of oil inlet and oil return, make the quick lifting of piston rod.
Description of drawings
Fig. 1 is the embodiments of the invention constructional drawing.
Fig. 2 is the bottom schematic view of Fig. 1.
Fig. 3 is application examples scheme drawing of the present invention.
The specific embodiment
See also Fig. 1 and Fig. 2, in the following description every relate to upper end, lower end, towards last, all be with location status shown in Figure 1 towards the statement of following and so on directivity.Provided the valve seat 1 of a disc, this valve seat 1 towards on a side the surface and constitute a primary sealing area 11 and a secondary sealing area 12 around the circumferencial direction of valve seat 1, the space between first, second sealing surface 11,12 constitutes the recessed road 13 of oil inlet and oil return.Valve seat 1 towards on a side and be positioned at middle position and constitute a spring-loaded chamber 15, offer a valve position-limited lever resigning hole 16 that communicates with spring-loaded chamber 15 at the middle position corresponding to the diapire in spring-loaded chamber 15, on valve seat 1 and offer one group of top from valve seat 1 around the circumferencial direction of valve seat 1 with the interval state and connect oil inlet and oil return hole 14 to the bottom, each oil inlet and oil return hole 14 communicates with the recessed road 13 of oil inlet and oil return, that is to say that the position of oil inlet and oil return hole 14 on valve seat 1 is corresponding to the recessed road 13 of oil inlet and oil return.
Though the quantity in aforesaid oil inlet and oil return hole 14 figure 2 illustrates six, can not limit the present invention whereby, because the quantity in one group of oil inlet and oil return hole 14 can be according to needing increase and decrease.
A valve position-limited lever 2 and a valve 3 have been provided, aforesaid valve position-limited lever resigning hole 16 is inserted and leant out in the lower end of this valve position-limited lever 2, revolve in the lower end of this valve position-limited lever 2 and to be furnished with a nut 21, the upper end of valve position-limited lever 2 probes into the middle position (offering the position-limited lever hole on the valve 3) of valve 3 and expands to establish and constitutes a pressure cap 22, this pressure cap 22 is resisted against valve 3 towards the surface of a last side, and constitute an inner hexagonal hole 221 at pressure cap 22, if the edge of the circumferencial direction of pressure cap 22 is constituted the outer-hexagonal face, both should be considered as so and inner hexagonal hole 221 equivalent, because all can operate to valve position-limited lever 2 for instrument.Valve 3 is nested with on valve position-limited lever 2, and matches with aforesaid primary sealing area 11 and secondary sealing area 12, offers a fuel return hole 31 at a slow speed at this valve 3, this at a slow speed fuel return hole 31 communicate with the recessed road 13 of aforesaid oil inlet and oil return.
If the hole wall at aforesaid valve position-limited lever resigning hole 16 processes negative thread, and process the position-limited lever outside thread in the lower end of valve position-limited lever 2, when assembling the position-limited lever outside thread is matched with negative thread, then can yet be regarded as equally is a good scheme that valve position-limited lever 2 is connected with valve seat 1.
Provided a spiral spring 4, this spring 4 is nested with on valve position-limited lever 2 and is positioned at spring-loaded chamber 15, and the upper end of this spring 4 is bearing on the aforementioned valve 3, and the lower end of spring 4 is bearing on the chamber diapire in spring-loaded chamber 15.
Application examples:
See also Fig. 3 and in conjunction with Fig. 1 and Fig. 2, figure 3 illustrates jack or transport the base 5 on top, offer oil inlet and oil return road 51 at this base 5, and at base 5 oil cylinder 6 is installed, in this oil cylinder 6, piston rod 61 is installed, on piston rod 61 and the bottom that is positioned at piston rod 61 be provided with piston rod packing circle 611, make piston rod 61 and the inwall of oil cylinder 6 form sealing by piston rod packing circle 611, aforesaid oil inlet and oil return road 51 communicates with the cavity of resorption of oil cylinder 6, and the slow oil returning valve structure of fast oil-feed provided by the invention is arranged on the passage in this oil inlet and oil return road 51.
When will be to the cavity of resorption fuel feeding of oil cylinder 6, under operator's operation, make oil pump (not shown) pump oil, hydraulic oil enters oil inlet and oil return road 51, enter hydraulic oil in the oil inlet and oil return road 51 on valve seat 1 of the present invention one group of oil inlet and oil return hole 14 and enter the recessed road 13 of oil inlet and oil return, be in valve 3 and first owing to the effect of spring 4 this moment, secondary sealing area 11,12 states that separate, namely, the top in the recessed road 13 of oil inlet and oil return is in opening, therefore the hydraulic oil that comes from oil inlet and oil return hole 14 directly enters the cavity of resorption of oil cylinder 6, piston rod 61 is stretched, by being arranged on the taking over a business upwards lifting of weight (being aforesaid object) of piston rod 61 tops outside the cylinder body of oil cylinder 6.Returned to the home position when making before by the weight of lifting, that is to say when piston rod 61 is bounced back in the cylinder body of oil cylinder 6, by the operator Hydraulic Pump (not shown) is operated, the piston rod 61 of oil cylinder 6 is descending under the effect of weight so, at this moment, and under the pressure effect of the hydraulic oil in oil cylinder 6, make valve 3 towards the direction displacement of valve seat 1, spring 4 compressions until valve 3 and first, second sealing surface 11,12 closures, are also namely sealed the top in the recessed road 13 of oil inlet and oil return.Under this state, pressure oil in the oil cylinder 6 can only be introduced the recessed road 13 of oil inlet and oil returns by way of fuel return hole 31 at a slow speed, and draw from oil inlet and oil return hole 14, so the answer speed of piston rod 61 is comparatively slow, thus the technique effect that refers in the superincumbent technique effect of the applicant hurdle embodied.
Claims (4)
1.
The slow oil returning valve structure of fast oil-feed that a kind of lifting implement is used, it is characterized in that comprising valve seat (1), valve position-limited lever (2), valve (3) and spring (4), go up and constitute primary sealing area (11) and secondary sealing area (12) towards a side surface of valve (3) at valve seat (1), this first, secondary sealing area (11,12) constitute the recessed road of an oil inlet and oil return (13) between, go up and offer one group of top from valve seat (1) around the circumferencial direction of valve seat (1) with the interval state at valve seat (1) and connect oil inlet and oil return hole (14) to the bottom, each oil inlet and oil return hole (14) is corresponding with the recessed road of described oil inlet and oil return (13) and communicate with the recessed road of oil inlet and oil return (13), constitute a spring-loaded chamber (15) in the central authorities of valve seat (1) and towards a side of valve (3), valve position-limited lever (2) is fixed on the middle position of valve seat (1), valve (3) is nested with on valve position-limited lever (2) with quick condition, and match with described primary sealing area (11) and secondary sealing area (12) simultaneously, go up and offer in the position corresponding to the recessed road of described oil inlet and oil return (13) side from the thickness direction of valve (3) at this valve (3) and connect a fuel return hole (31) at a slow speed to opposite side, spring (4) is nested with on valve position-limited lever (2), and be positioned at spring-loaded chamber (15), the upper end of this spring (4) is bearing on the valve (3), and the lower end is bearing on the chamber diapire in spring-loaded chamber (15), wherein: when spring (4) elongation and during jack-up valve (3), valve (3) leaves described primary sealing area (11) and secondary sealing area (12), open on the top in the recessed road of described oil inlet and oil return (13), and when spring (4) compresses, valve (3) contacts with primary sealing area (11) and secondary sealing area (12), the top sealing in the recessed road of oil inlet and oil return (13).
2.
The slow oil returning valve structure of fast oil-feed that lifting implement according to claim 1 is used, it is characterized in that going up and the middle position that is positioned at described spring-loaded chamber (15) offers a valve position-limited lever resigning hole (16) at described valve seat (1), the lower end of described valve position-limited lever (2) is passed this valve position-limited lever resigning hole (16) and is limited by nut (21), and the upper end of valve position-limited lever (2) leans out described valve (3) and be resisted against valve (3) back to a side of described valve seat (1).
3.
The slow oil returning valve structure of fast oil-feed that lifting implement according to claim 2 is used, it is characterized in that constituting a pressure cap (22) in the described upper end of described valve position-limited lever (2), this pressure cap (22) is resisted against described valve (3) back to a side of described valve seat (1).
4.
The slow oil returning valve structure of fast oil-feed that lifting implement according to claim 1 is used is characterized in that described spring (4) is coil spring
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310265878.3A CN103318801B (en) | 2013-06-28 | 2013-06-28 | Quick oil inletting and slow oil returning valve structure for lifting tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310265878.3A CN103318801B (en) | 2013-06-28 | 2013-06-28 | Quick oil inletting and slow oil returning valve structure for lifting tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103318801A true CN103318801A (en) | 2013-09-25 |
| CN103318801B CN103318801B (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310265878.3A Active CN103318801B (en) | 2013-06-28 | 2013-06-28 | Quick oil inletting and slow oil returning valve structure for lifting tools |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979450A (en) * | 2014-04-24 | 2014-08-13 | 华国洋 | Jack extension-retraction device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3536094A (en) * | 1968-03-12 | 1970-10-27 | Flavious E Manley Jr | Compressor valve |
| DE1901835B2 (en) * | 1969-01-15 | 1977-03-03 | Progress-Werk Oberkirch Ag, 7602 Oberkirch | Combined valve an radiator filler cap - combines pressure and vacuum reliefs in one piece check valve |
| WO2001002761A1 (en) * | 1999-07-06 | 2001-01-11 | Eusebi Impianti - S.R.L. | Valve for high pressure gas cylinders |
| CN2430590Y (en) * | 2000-07-10 | 2001-05-16 | 任学民 | One way throttle valve device |
| CN2592991Y (en) * | 2002-09-05 | 2003-12-17 | 程长征 | Non-return valve |
| CN102287558A (en) * | 2011-08-19 | 2011-12-21 | 青岛金黄海集装箱有限公司 | Check valve with safety valve |
| CN202138985U (en) * | 2011-07-13 | 2012-02-08 | 周爱兴 | Oil return speed adjustable device for jack |
| CN203319628U (en) * | 2013-06-28 | 2013-12-04 | 常熟通润汽车修理设备有限公司 | Rapid oil-taking and slow oil-returning valve structure for lifting tool |
-
2013
- 2013-06-28 CN CN201310265878.3A patent/CN103318801B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3536094A (en) * | 1968-03-12 | 1970-10-27 | Flavious E Manley Jr | Compressor valve |
| DE1901835B2 (en) * | 1969-01-15 | 1977-03-03 | Progress-Werk Oberkirch Ag, 7602 Oberkirch | Combined valve an radiator filler cap - combines pressure and vacuum reliefs in one piece check valve |
| WO2001002761A1 (en) * | 1999-07-06 | 2001-01-11 | Eusebi Impianti - S.R.L. | Valve for high pressure gas cylinders |
| CN2430590Y (en) * | 2000-07-10 | 2001-05-16 | 任学民 | One way throttle valve device |
| CN2592991Y (en) * | 2002-09-05 | 2003-12-17 | 程长征 | Non-return valve |
| CN202138985U (en) * | 2011-07-13 | 2012-02-08 | 周爱兴 | Oil return speed adjustable device for jack |
| CN102287558A (en) * | 2011-08-19 | 2011-12-21 | 青岛金黄海集装箱有限公司 | Check valve with safety valve |
| CN203319628U (en) * | 2013-06-28 | 2013-12-04 | 常熟通润汽车修理设备有限公司 | Rapid oil-taking and slow oil-returning valve structure for lifting tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979450A (en) * | 2014-04-24 | 2014-08-13 | 华国洋 | Jack extension-retraction device |
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| Publication number | Publication date |
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| CN103318801B (en) | 2015-06-24 |
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