CN203822757U - Hydraulic lock provided with pilot one-way valve - Google Patents
Hydraulic lock provided with pilot one-way valve Download PDFInfo
- Publication number
- CN203822757U CN203822757U CN201420150859.6U CN201420150859U CN203822757U CN 203822757 U CN203822757 U CN 203822757U CN 201420150859 U CN201420150859 U CN 201420150859U CN 203822757 U CN203822757 U CN 203822757U
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- China
- Prior art keywords
- valve
- hole
- guide
- plug
- main valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000012530 fluid Substances 0.000 claims description 31
- 239000011148 porous material Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 17
- 239000010720 hydraulic oil Substances 0.000 description 16
- 230000007423 decrease Effects 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- Check Valves (AREA)
Abstract
The utility model discloses a hydraulic lock provided with a pilot one-way valve, which comprises a valve body (1), a piston (2) and a plug-in type one-way valve provided with a pilot, wherein an oil port I (3) is formed in the top of one end of the valve body (1), an oil port II (4) is formed in the bottom of the other end of the valve body (1), and a through hole is formed in the valve body (1); the plug-in type one-way valve provided with the pilot comprises a valve deck (5), a valve sleeve (6), a main valve core (7), a main valve core spring (8), a pilot valve core (9) and a pilot valve spring (10); and a circular groove (12) is formed in a through hole I (11), a tapered structure identical to a pilot valve seat (16) is arranged at the bottom of the pilot valve core (9), and a small throttling hole (18) communicated with a through hole II (15) and the circular groove (12) is formed in the main valve core (7). The hydraulic lock has the benefits as follows: the structure is simple and small, the hydraulic lock is long in service life, a weight moves stably downwards, the system power loss is small, and a system cannot emit heat.
Description
Technical field
The utility model relates to the hydraulic lock of hydraulic oil lifting weight, particularly a kind of hydraulic lock with guide's one-way valve.
Background technique
In engineering machinery, in the utilization of farm machinery and building machinery, usually need to promote, decline weight, as the lifting structure of the swing arm of the luffing of the lifting mechanism of hoist, swing arm, loader, tractor etc.Weight or oil cylinder or piston to be locked to certain position, in decline process, realize steady decline simultaneously.Common solution is balance valve, but the structure of equilibrium valve is more complicated, and manufacture cost is high, usually for the hydraulic system of large flow.
Therefore, people replace balance by hydraulic lock conventionally, the work of hydraulic lock as shown in Figure 1, when weight is during by lifting, through the left position of selector valve, the one-way valve in hydraulic lock enters the A mouth of oil cylinder to the oil of selector valve filler opening (P mouth), and the oil of B mouth is got back to fuel tank through selector valve simultaneously.In the time that weight declines, selector valve is changed to right position, and the oil of P mouth enters the B chamber of oil cylinder through the right position of selector valve, the piston that promotes oil cylinder declines, and under the effect of weight and the effect of oil liquid pressure, weight is attempted to decline, because fluid and the one-way valve in A chamber are reverse, fluid cannot pass through one-way valve, and therefore, weight is locked in a certain height, and only have in the time that the oil liquid pressure in B chamber reaches certain value, hydraulic pressure promotes piston, and one-way valve is pushed open, and weight is just declined.For this design, piston area is difficult to do greatly with the ratio of the valve seat area of one-way valve, and this just causes the pressure in B chamber while decline very high, and the one-way valve in A chamber is opened very little and caused a large amount of throttlings, crosses high power losses and makes system heating.Therefore should make Area Ratio as far as possible large.Adopt the design of Fig. 1, will increase the volume of valve and the difficulty of manufacture, simultaneously due to the effect of hydraulic pressure, pushing one-way valve open needs very high thrust.So greatly shorten the working life of hydraulic lock.
Model utility content
The purpose of this utility model is to overcome the shortcoming of prior art, the hydraulic lock with guide's one-way valve of provide that a kind of volume simple in structure is little, hydraulic lock long service life, weight being done steady descending motion, system power loss is little, system can not be generated heat.
The purpose of this utility model is achieved through the following technical solutions: a kind of hydraulic lock with guide's one-way valve, it comprises valve body, piston and plug-in type band guide's one-way valve, the top of valve body one end is provided with hydraulic fluid port I, the bottom of the valve body the other end is provided with hydraulic fluid port II, in valve body, be provided with through hole, hydraulic fluid port I and hydraulic fluid port II are all communicated with through hole, through hole is taking hydraulic fluid port II as being divided into chamber I and chamber II, plug-in type band guide's one-way valve comprises valve gap, valve pocket, main valve plug, main valve plug spring, guide's spool and pilot valve spring, valve pocket is arranged in chamber I and in valve pocket and is provided with through hole I, in through hole I, be provided with circular groove, on valve pocket cylinder, be provided with the radial hole that is communicated with circular groove and hydraulic fluid port I, on the inwall of through hole I bottom, be provided with the main valve seat of surperficial tapered shape, valve gap is by the port sealing near hydraulic fluid port I side on valve body, main valve plug is inserted in through hole I, main valve plug bottom is provided with the cone structure identical with main valve seat, main valve plug bottom is against on main valve seat, main valve plug spring one end is pressed on valve gap and the main valve plug spring the other end is fixed on main valve plug top, in main valve plug, be provided with through hole II, on the inwall of through hole II bottom, be provided with guide's valve seat of surperficial tapered shape, guide's spool bottom is against on guide's valve seat, guide's spool is inserted in through hole II, guide's spool bottom is provided with the cone structure identical with guide's valve seat, pilot valve spring one end is pressed on valve gap and the pilot valve spring the other end is fixed on guide's spool top, on main valve plug, be provided with the throttling pore that is communicated with through hole II and circular groove.
Described radial hole is evenly distributed on valve pocket.
Between described valve pocket and valve body, be provided with seal ring.
The utlity model has following advantage: on main valve plug of the present utility model, be provided with the throttling pore being communicated with perpendicular to through hole II and with through hole II, throttling pore is communicated with circular groove, on valve pocket cylinder, be provided with the radial hole that is communicated with circular groove and hydraulic fluid port I, when selector valve is in right when position, in-oil cylinder hydraulic oil can not be got back to fuel tank by this hydraulic lock, and only have when guide valve core is opened in the ban, cause main valve plug to produce pressure difference, this hydraulic lock just can be opened, otherwise fluid cannot pass through hydraulic lock, and weight is locked in a certain position; In the time that the oil liquid pressure of the epicoele of oil cylinder reaches certain value, the push rod of piston is pushed guide's spool open, hydraulic oil in through hole II flows out through hydraulic fluid port II by guide's valve seat again, flow back to fuel tank finally by selector valve, thereby make the hydraulic oil release of through hole II, now pilot valve is opened, and the pressure of the spring chamber of main valve plug is reduced to return pressure simultaneously.Because the area of the spring chamber of main valve plug is greater than its spool conical surface area of contour and deducts the area of valve seat, under the Action of Gravity Field of weight, main valve plug is opened, weight steadily declines, and because guide's spool is very little, the power of the spring of guide's spool can be adjusted to very little again, therefore, piston only needs very little power just guide's spool can be pushed open, has reduced power loss, and system is not generated heat.
Brief description of the drawings
Fig. 1 is the structural representation of conventional hydraulic lock;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is mounting structure schematic diagram of the present utility model;
In figure, 1-valve body, 2-piston, 3-hydraulic fluid port I, 4-hydraulic fluid port II, 5-valve gap, 6-valve pocket, 7-main valve plug, 8-main valve plug spring, 9-guide's spool, 10-pilot valve spring, 11-through hole I, 12-circular groove, 13-radial hole, 14-main valve seat, 15-through hole II, 16-guide's valve seat, 17-seal ring, 18-throttling pore, 19-chamber I, 20-chamber II.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described, protection domain of the present utility model is not limited to the following stated:
As shown in Figure 2, a kind of hydraulic lock with guide's one-way valve, it comprises valve body 1, piston 2 and plug-in type band guide's one-way valve, the top of valve body 1 one end is provided with hydraulic fluid port I3, the bottom of valve body 1 the other end is provided with hydraulic fluid port II4, in valve body 1, be provided with through hole, hydraulic fluid port I3 and hydraulic fluid port II4 are all communicated with through hole, through hole is taking hydraulic fluid port II4 as being divided into chamber I19 and chamber II20, plug-in type band guide's one-way valve comprises valve gap 5, valve pocket 6, main valve plug 7, main valve plug spring 8, guide's spool 9 and pilot valve spring 10, valve pocket 6 is arranged in chamber I19 and in valve pocket 6 and is provided with through hole I11, in through hole I11, be provided with circular groove 12, on valve pocket 6 cylinders, be provided with the radial hole 13 that is communicated with circular groove 12 and hydraulic fluid port I3, on the inwall of through hole I11 bottom, be provided with the main valve seat 14 of surperficial tapered shape, valve gap 5 is by the port sealing near hydraulic fluid port I3 side on valve body 1, main valve plug 7 is inserted in through hole I11, main valve plug 7 bottoms are provided with the cone structure identical with main valve seat 14, main valve plug 7 bottoms are against on main valve seat 14, main valve plug spring 8 one end are pressed on valve gap 5 and main valve plug spring 8 the other ends are fixed on main valve plug 7 tops, in main valve plug 7, be provided with through hole II15, on the inwall of through hole II15 bottom, be provided with guide's valve seat 16 of surperficial tapered shape, guide's spool 9 bottoms are against on guide's valve seat 16, guide's spool 9 is inserted in through hole II15, guide's spool 9 bottoms are provided with the cone structure identical with guide's valve seat 16, pilot valve spring 10 one end are pressed on valve gap 5 and pilot valve spring 10 the other ends are fixed on guide's spool 9 tops, on main valve plug 7, be provided with the throttling pore 18 that is communicated with through hole II15 and circular groove 12.
As shown in Figure 2, radial hole 13 is evenly distributed on valve pocket 6; Between valve pocket 6 and valve body 1, be provided with seal ring 17.
Working procedure of the present utility model is as follows: as Fig. 2 and in conjunction with as shown in Fig. 3, as Fig. 2 and in conjunction with as shown in Fig. 3, three position four-way directional control valve is switched to left position, pump is extracted hydraulic oil hydraulic oil is sent in three position four-way directional control valve out, hydraulic oil enters in hydraulic lock through hydraulic fluid port II4 again, hydraulic oil is pushed main valve plug 7 open, main valve plug 7 is moved to the left, now, main valve plug 7 separates with main valve seat 14, hydraulic oil by main valve seat 14 again radial hole 13 flow into the cavity of resorption of oil cylinder, now, in-oil cylinder piston 2 bars are upwards released, thereby weight is risen, three position four-way directional control valve is switched to right position, pump is extracted hydraulic oil hydraulic oil is sent in three position four-way directional control valve out, hydraulic oil enters the epicoele of oil cylinder through three position four-way directional control valve, less owing to being just passed into the pressure of hydraulic oil of cylinder upper cavity oil, thereby cause hydraulic oil cannot promote piston 2, guide's spool 9 is all the time in closed condition, therefore, weight is locked in a certain position, when the hydraulic fluid pressure of cylinder upper cavity oil increases to while being enough to promote piston 2 gradually, piston rod on piston 2 promotes guide's spool 9 and is moved to the left, now, guide's valve seat 16 separates with main guide's spool 9, when guide valve core 9 is by throttling pore 18 in the ban, the hydraulic oil of through hole II15 flows out through hydraulic fluid port II4 by guide's valve seat 16 again, be back to fuel tank finally by three position four-way directional control valve, thereby make the hydraulic oil release of through hole II15, now, pilot valve is opened, the pressure of the spring chamber of main valve plug 7 is reduced to return pressure simultaneously, therefore, under the Action of Gravity Field of weight, main valve plug 7 is opened, weight steadily declines, again because guide's spool 9 is very little, the power of the spring of guide's spool 9 can be adjusted to very little, therefore, 2 very little power of need of piston just can be pushed guide's spool 9 open, reduce the power loss of system, system can not be generated heat.
Claims (3)
1. the hydraulic lock with guide's one-way valve, it is characterized in that: it comprises valve body (1), piston (2) and plug-in type band guide's one-way valve, the top of valve body (1) one end is provided with hydraulic fluid port I(3), the bottom of valve body (1) the other end is provided with hydraulic fluid port II(4), valve body is provided with through hole in (1), hydraulic fluid port I(3) and hydraulic fluid port II(4) be all communicated with through hole, through hole is taking hydraulic fluid port II(4) as being divided into chamber I(19) and chamber II(20), plug-in type band guide's one-way valve comprises valve gap (5), valve pocket (6), main valve plug (7), main valve plug spring (8), guide's spool (9) and pilot valve spring (10), valve pocket (6) is arranged on chamber I(19) in and valve pocket (6) in be provided with through hole I(11), through hole I(11) in be provided with circular groove (12), on valve pocket (6) cylinder, be provided be communicated with circular groove (12) with hydraulic fluid port I(3) radial hole (13), through hole I(11) be provided with the main valve seat (14) of surperficial tapered shape on the inwall of bottom, valve gap (5) by upper valve body (1) near hydraulic fluid port I(3) port sealing of side, main valve plug (7) is inserted into through hole I(11) in, main valve plug (7) bottom is provided with the cone structure identical with main valve seat (14), main valve plug (7) bottom is against on main valve seat (14), main valve plug spring (8) one end is pressed on valve gap (5) above and main valve plug spring (8) the other end is fixed on main valve plug (7) top, main valve plug is provided with through hole II(15 in (7)), through hole II(15) be provided with guide's valve seat (16) of surperficial tapered shape on the inwall of bottom, guide's spool (9) bottom is against on guide's valve seat (16), guide's spool (9) is inserted into through hole II(15) in, guide's spool (9) bottom is provided with the cone structure identical with guide's valve seat (16), pilot valve spring (10) one end is pressed on valve gap (5) above and pilot valve spring (10) the other end is fixed on guide's spool (9) top, on main valve plug (7), be provided with and be communicated with through hole II(15) with the throttling pore (18) of circular groove (12).
2. a kind of hydraulic lock with guide's one-way valve according to claim 1, is characterized in that: described radial hole (13) is evenly distributed on valve pocket (6).
3. a kind of hydraulic lock with guide's one-way valve according to claim 1, is characterized in that: between described valve pocket (6) and valve body (1), be provided with seal ring (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420150859.6U CN203822757U (en) | 2014-03-31 | 2014-03-31 | Hydraulic lock provided with pilot one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420150859.6U CN203822757U (en) | 2014-03-31 | 2014-03-31 | Hydraulic lock provided with pilot one-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203822757U true CN203822757U (en) | 2014-09-10 |
Family
ID=51478266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420150859.6U Expired - Lifetime CN203822757U (en) | 2014-03-31 | 2014-03-31 | Hydraulic lock provided with pilot one-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203822757U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899596A (en) * | 2014-03-31 | 2014-07-02 | 雷永志 | Hydraulic lock with pilot one-way valve |
| CN107218261A (en) * | 2017-06-30 | 2017-09-29 | 湖南十开科技有限公司 | Hydraulic lock and load feedback hydraulic system |
| CN108561355A (en) * | 2018-07-12 | 2018-09-21 | 宁波善研液压有限公司 | bidirectional hydraulic lock |
| WO2025156716A1 (en) * | 2024-01-26 | 2025-07-31 | 北京天玛智控科技股份有限公司 | Three-position four-way directional control valve, control method, and control apparatus |
-
2014
- 2014-03-31 CN CN201420150859.6U patent/CN203822757U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899596A (en) * | 2014-03-31 | 2014-07-02 | 雷永志 | Hydraulic lock with pilot one-way valve |
| CN103899596B (en) * | 2014-03-31 | 2016-11-02 | 雷永志 | A kind of hydraulic lock of band guide's check valve |
| CN107218261A (en) * | 2017-06-30 | 2017-09-29 | 湖南十开科技有限公司 | Hydraulic lock and load feedback hydraulic system |
| CN108561355A (en) * | 2018-07-12 | 2018-09-21 | 宁波善研液压有限公司 | bidirectional hydraulic lock |
| WO2025156716A1 (en) * | 2024-01-26 | 2025-07-31 | 北京天玛智控科技股份有限公司 | Three-position four-way directional control valve, control method, and control apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SICHUAN DEEN PRECISION INDUSTRY TECHNOLOGY CO., LT Free format text: FORMER OWNER: LEI YONGZHI Effective date: 20150803 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150803 Address after: 620460 Meishan City West Industrial Zone of Sichuan Province, Qingshen County Patentee after: SICHUAN CPT PRECISION INDUSTRY SCIENCE & TECHNOLOGY Co.,Ltd. Address before: Meishan City, Sichuan Province, 610072 South Street No. 22, Qingshen County Green Town Patentee before: Lei Yongzhi |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140910 |
|
| CX01 | Expiry of patent term |