CN201425044Y - Pneumatic reversing valve for dump trucks - Google Patents
Pneumatic reversing valve for dump trucks Download PDFInfo
- Publication number
- CN201425044Y CN201425044Y CN2009200256578U CN200920025657U CN201425044Y CN 201425044 Y CN201425044 Y CN 201425044Y CN 2009200256578 U CN2009200256578 U CN 2009200256578U CN 200920025657 U CN200920025657 U CN 200920025657U CN 201425044 Y CN201425044 Y CN 201425044Y
- Authority
- CN
- China
- Prior art keywords
- valve
- chamber
- oil
- hydraulic fluid
- fluid port
- 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 - Fee Related
Links
Images
Abstract
The utility model discloses a pneumatic reversing valve for dump trucks. The pneumatic reversing valve comprises a valve body, a slide valve and an air cylinder, the valve body is provided with a return port, an oil port P1 and an oil port P2, a one-way valve is mounted between the oil port P1 and the oil port P2, an oil drainage chamber, an oil chamber I, a return chamber and an oil chamber II are arranged from the left to the right in the valve body, a slide valve hole which penetrates all the chambers is arranged in the valve body, the slide valve which can slide to the left and the right is mounted in the slide valve hole, the left end of the slide valve is inserted in the oil drainage chamber, the slide valve is connected with a release spring, and is connected with the air cylinder through a pull rod, the air cylinder is provided with two pistons and three air chambers, each air chamber is provided with an air inlet, and a positioning check ring is arranged between the two pistons. The utility model greatly improves the safety property of a hydraulic system, so that the hydraulic system can reliably operate and can be safely used. Meanwhile, the utility model also effectivelyprotects the service life of each hydraulic component, and moreover, the utility model has the advantages of stable operation, little leakage and compact and reasonable structure.
Description
Technical field
The utility model relates to a kind of selector valve, particularly a kind of dumping car Pneumatic reversal valve.
Background technique
In the prior art, the utility model patent of notification number CN2755330Y, provided a kind of Pneumatic reversal valve, this Pneumatic valve has realized that gas control falls slowly, falls soon, the reliable control of lifting, but also there is certain deficiency, mainly show the safety installations that does not have the integrated hydraulic system, as everyone knows, when the user is in overload situation following time, this hydraulic system pressure also will increase, in the past for a long time, will cause overload to damage to elements such as the oil cylinder of hydraulic system, working pumps, the guiding valve diameter is thick in addition, in let out greatly, steering force is big.
Summary of the invention
The technical problems to be solved in the utility model is: a kind of reliable operation, safe in utilization and easy to operate dumping car Pneumatic reversal valve are provided.
In order to solve the problems of the technologies described above, the utility model comprises valve body, guiding valve and cylinder, return opening is arranged on the valve body, P1 hydraulic fluid port and P2 hydraulic fluid port, between P1 hydraulic fluid port and the P2 hydraulic fluid port one-way valve is housed, from left to right be provided with the draining chamber in the valve body, oil pocket I, oil back chamber and oil pocket II, be provided with the sliding valve hole that passes aforementioned all chambeies in the valve body, the guiding valve that can horizontally slip is housed in the sliding valve hole, the guiding valve left end is inserted in the draining chamber, guiding valve is connected with return spring, guiding valve is connected with cylinder by pull bar, cylinder has two pistons and three air chambers, each air chamber is provided with a suction port, be provided with positioning retainer ring between two pistons, the right-hand member of pull bar left end and guiding valve is fixed, the pull bar right-hand member passes left piston in the cylinder and right piston and fixes with right piston, left piston and pull bar are slidingly matched, guiding valve is provided with the damping hole that is communicated with draining chamber and oil back chamber, return opening and oil back chamber communicate, P1 hydraulic fluid port and oil pocket I communicate, and P2 hydraulic fluid port and oil pocket II communicate, and valve body is provided with safety overflow valve, the high pressure hydraulic fluid port of safety overflow valve communicates with oil pocket oil pocket II, and the unloading port of safe safety overflow valve communicates with the draining chamber.
For the ease of being connected with the oil hydraulic pump of dumping car, described valve body is provided with filler opening, and described return opening is communicated with filler opening or oil sump tank.
Slowly fall for the ease of the control dumping car, described guiding valve is provided with and falls oil through slowly.
In order to make its compact structure, the right side that is positioned at oil pocket II in the described valve body is provided with the return spring chamber, and described return spring is arranged in the return spring chamber.
In order to make its stable working, have the buffering mouth between described oil back chamber and the return spring chamber.
The beneficial effects of the utility model are: be integrated with safety overflow valve on the utility model valve body, can improve the security feature of hydraulic system greatly, make its reliable operation, safe in utilization.Also effectively protected simultaneously the working life of each hydraulic element; By operation cylinder different suction port air inlet, can realize the falling slowly of dumping car, fall soon, the reliable control of lifting, easy to operate.The utility model falls form slowly and adopts unique draining mode, can significantly reduce the power of surging of guiding valve; And the utility model stable working, amount of leakage is low, compact structure is reasonable.
Description of drawings
Fig. 1 is the structural representation of the utility model specific embodiment one;
Fig. 2 is the A-A sectional structure schematic representation of Fig. 1;
Fig. 3 is the structural representation of the utility model specific embodiment two;
Fig. 4 is the B-B sectional structure schematic representation of Fig. 3;
Among the figure, 1, valve body, 2, the draining road, 3, safety overflow valve, 4, oil back chamber, 5, return opening, 6, suction port falls slowly, 7, the decline suction port, 8, cylinder head, 9, the lifting suction port, 10, cylinder barrel, 11, piston, 12, positioning retainer ring, 13, piston falls slowly, 14, positioning baffle, 15, spring seat, 16, pull bar, 17, return spring, 18, the return spring chamber, 19, pad, 20, oil pocket I, 21, oil pocket II, 22, guiding valve, 23, the draining chamber, 24, the one-way valve return spring, 25, one-way valve, 26, the P1 hydraulic fluid port, 27, the P2 hydraulic fluid port, 28, filler opening, 29, interstage sleeve, 30, damping hole, 31, oil through falls slowly, 32, the buffering mouth, 33, plug screw.
Embodiment
Specific embodiment one
A kind of specific embodiment as depicted in figs. 1 and 2, it comprises valve body 1, guiding valve 22 and cylinder.
Cylinder includes positioning baffle 14, falls piston 13, piston 11, positioning retainer ring 12, cylinder barrel 10 and cylinder head 8 slowly, wherein positioning baffle 14, fall piston 13, piston 11, positioning retainer ring 12, cylinder head 8 slowly and be divided into cylinder barrel 10 independently that three air chambers are respectively slow sending down abnormally ascending chamber MJ, decline air chamber XJ and lifting air chamber JS, slow sending down abnormally ascending chamber MJ is provided with and falls suction port 6 slowly, decline air chamber XJ is provided with decline suction port 7, and lifting air chamber JS is provided with lifting suction port 9; Pull bar 16 1 ends are fixedlyed connected with piston 11 by nut, and it is mobile with piston 11, slowly falling piston 13 can do along pull bar 16 and cylinder barrel 10 and be free to slide, pull bar 16 the other ends are connected with guiding valve 22, between P1 hydraulic fluid port 26 and P2 hydraulic fluid port 27, one-way valve 25 is housed, one-way valve return spring 24 is housed in the one-way valve 25; Safety overflow valve 3 also is housed on the valve body, and the high pressure side of safety overflow valve 3 is communicated with oil pocket II21, and the draining side is communicated with draining chamber 23 by draining road 2, and draining chamber 23 is communicated with oil back chamber 4 by guiding valve 22 internal damping holes 30.Also have buffering mouth 32 between this external oil back chamber 4 and the return spring chamber 18.
Using method: P1 hydraulic fluid port 26 connects the oil outlet of the oil hydraulic pump of dumping car, and P2 hydraulic fluid port 27 connects elevating ram cavity of resorption hydraulic fluid port, the filler opening of the oil hydraulic pump of filler opening 28 1 termination dumping cars, the other end connected tank or elevating ram epicoele.
Working procedure:
When each suction port of cylinder all communicates with atmosphere, this moment piston 11, fall piston 13 slowly and under return spring 17 effect, be in position shown in the accompanying drawing 1, guiding valve 22 cuts off oil pocket II21 and oil back chamber 4, oil pocket I20 and oil back chamber 4 are connected, fluid enters oil pocket I20 by P1 hydraulic fluid port 26, enter oil back chamber 4 by oil pocket I20 by guiding valve 22, get back to fuel tank by return opening 5 again, stop function in the realization.
When 9 ventilations of lifting suction port, during the logical atmosphere of other each mouthfuls, this moment, piston 11 drive guiding valves 22 moved left to positioning retainer ring 12 places, guiding valve 22 cuts off oil pocket II21 and oil back chamber 4, oil pocket I20 and oil back chamber 4 also cut off, fluid is pushed one-way valve 25 open by P1 hydraulic fluid port 26 and is entered P2 hydraulic fluid port 27, enters equipment, realizes the lifting function; When guiding valve 22 is in lift location; if the load of lifting is excessive; when oil pocket II21 pressure surpasses the pressure limit of safety overflow valve 3 settings; safety overflow valve 3 is opened; fluid is got back to draining chamber 23 by draining road 2; owing to have damping hole 30 between draining chamber 23 and the oil back chamber 4; between draining chamber 23 and oil back chamber 4, form pressure differential deltap P this moment; when Δ P pressure to the thrust of guiding valve 22 during greater than the thrust of 11 pairs of guiding valves 22 of piston; guiding valve 22 meta that will under the effect of return spring 17, move right; and then with oil pocket II21 and oil back chamber 4 connections, oil pocket II21 pressure release is protected each element of system.
When 7 ventilations of decline suction port, during the logical atmosphere of other each mouthfuls, this moment, piston 11 drove guiding valves 22 cylinder head 8 places that move to right, guiding valve 22 is connected oil pocket I20, oil pocket II21 and oil back chamber 4, fluid enters oil pocket I20, oil pocket II21 by P1 hydraulic fluid port 26, P2 hydraulic fluid port 27 respectively, enter oil back chamber 4 by guiding valve 22 again, get back to fuel tank, realize the decline function by return opening 5.
When falling suction port 6 ventilations slowly, during the logical atmosphere of other each mouthfuls, slowly falling piston 13 this moment promotes piston 11 and drives guiding valve 22 to be shifted to the right to positioning retainer ring 12 places, guiding valve 22 is connected oil pocket I20 and oil back chamber 4, oil pocket II21 is communicated with oil back chamber 4 by falling oil through 31 on the guiding valve 22 slowly, P1 hydraulic fluid port 26 fluid are got back to fuel tank by oil pocket I20, guiding valve 22, oil back chamber 4, return opening 5, P2 hydraulic fluid port 27 fluid by oil through 31 falls slowly on oil pocket II21, the guiding valve 22, oil back chamber 4 is communicated with return opening 5, and then realizes falling slowly function.
Specific embodiment two
A kind of specific embodiment as shown in Figure 3, Figure 4, the difference of it and specific embodiment one is: return opening 5 usefulness plug screws 33 are blocked, and the interstage sleeve between oil back chamber 4 and the filler opening 28 29 is removed.
Concrete working procedure is as follows: when cylinder barrel 10 each suction port all communicate with atmosphere, this moment piston 11, fall piston 13 slowly and be in position shown in the accompanying drawing, guiding valve 22 cuts off oil pocket II21 and oil back chamber 4, oil pocket I20 and oil back chamber 4 are connected, fluid enters oil pocket I20 by P1 hydraulic fluid port 26, enter oil back chamber 4 by oil pocket I20 by guiding valve 22, get back to filler opening 28 by oil back chamber 4 again, stop function in the realization; When 9 ventilations of lifting suction port, during the logical atmosphere of other each mouthfuls, this moment, piston 11 drive guiding valves 22 moved left to positioning baffle 14 places, guiding valve 22 cuts off oil pocket II21 and oil back chamber 4, oil pocket I20 and oil back chamber 4 also cut off, fluid is pushed one-way valve 25 open by P1 hydraulic fluid port 26 and is entered P2 hydraulic fluid port 27, enters equipment, realizes the lifting function; When 7 ventilations of decline suction port, during the logical atmosphere of other each mouthfuls, this moment, piston 11 drove guiding valves 22 cylinder head 8 places that move to right, guiding valve 22 is connected oil pocket I20, oil pocket II21 and oil back chamber 4, fluid enters oil pocket I20, oil pocket II21 by P1 hydraulic fluid port 26, P2 hydraulic fluid port 27 respectively, enter oil back chamber 4 by guiding valve 22 again, get back to filler opening 28, realize the decline function from oil back chamber 4; When falling suction port 6 ventilations slowly, during the logical atmosphere of other each mouthfuls, slowly falling piston 13 this moment promotes piston 11 and drives guiding valve 22 to be shifted to the right to positioning retainer ring 12 places, guiding valve 22 is connected oil pocket I20 and oil back chamber 4, oil pocket II21 is communicated with oil return 4 chambeies by falling oil through 31 on the guiding valve 22 slowly, P1 hydraulic fluid port 26 fluid are got back to filler opening 28 by oil pocket I20, guiding valve 22, oil back chamber 4, P2 hydraulic fluid port 27 fluid by oil through 31 falls slowly on oil pocket II21, the guiding valve 22, oil back chamber 4 is communicated with filler opening 28, and then realizes falling slowly function.
Claims (5)
1, a kind of dumping car Pneumatic reversal valve, it is characterized in that: comprise valve body, guiding valve and cylinder, return opening is arranged on the valve body, P1 hydraulic fluid port and P2 hydraulic fluid port, between P1 hydraulic fluid port and the P2 hydraulic fluid port one-way valve is housed, from left to right be provided with the draining chamber in the valve body, oil pocket I, oil back chamber and oil pocket II, be provided with the sliding valve hole that passes aforementioned all chambeies in the valve body, the guiding valve that can horizontally slip is housed in the sliding valve hole, the guiding valve left end is inserted in the draining chamber, guiding valve is connected with return spring, guiding valve is connected with cylinder by pull bar, cylinder has two pistons and three air chambers, each air chamber is provided with a suction port, be provided with positioning retainer ring between two pistons, the right-hand member of pull bar left end and guiding valve is fixed, the pull bar right-hand member passes left piston in the cylinder and right piston and fixes with right piston, left piston and pull bar are slidingly matched, guiding valve is provided with the damping hole that is communicated with draining chamber and oil back chamber, return opening and oil back chamber communicate, P1 hydraulic fluid port and oil pocket I communicate, and P2 hydraulic fluid port and oil pocket II communicate, and valve body is provided with safety overflow valve, the high pressure hydraulic fluid port of safety overflow valve communicates with oil pocket II, and the unloading port of safety overflow valve communicates with the draining chamber.
2, dumping car Pneumatic reversal valve according to claim 1, it is characterized in that: described valve body is provided with filler opening, and described oil back chamber is communicated with filler opening or oil sump tank.
3, dumping car Pneumatic reversal valve according to claim 1 and 2 is characterized in that: described guiding valve is provided with and falls oil through slowly.
4, dumping car Pneumatic reversal valve according to claim 3 is characterized in that: the right side that is positioned at oil pocket II in the described valve body is provided with the return spring chamber, and described return spring is arranged in the return spring chamber.
5, dumping car Pneumatic reversal valve according to claim 4 is characterized in that: have the buffering mouth between described oil back chamber and the return spring chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200256578U CN201425044Y (en) | 2009-05-19 | 2009-05-19 | Pneumatic reversing valve for dump trucks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200256578U CN201425044Y (en) | 2009-05-19 | 2009-05-19 | Pneumatic reversing valve for dump trucks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201425044Y true CN201425044Y (en) | 2010-03-17 |
Family
ID=42024489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200256578U Expired - Fee Related CN201425044Y (en) | 2009-05-19 | 2009-05-19 | Pneumatic reversing valve for dump trucks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201425044Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691689A (en) * | 2012-06-21 | 2012-09-26 | 黄培华 | Stepless speed-regulation slow-reduction air-controlled distribution valve |
| CN103322239A (en) * | 2013-06-26 | 2013-09-25 | 邱金成 | Three-cavity type three-position four-way air-control reversing hydraulic valve |
| CN108506267A (en) * | 2018-05-02 | 2018-09-07 | 宁波真格液压科技有限公司 | A kind of loop choice valve with decompression function |
-
2009
- 2009-05-19 CN CN2009200256578U patent/CN201425044Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691689A (en) * | 2012-06-21 | 2012-09-26 | 黄培华 | Stepless speed-regulation slow-reduction air-controlled distribution valve |
| CN102691689B (en) * | 2012-06-21 | 2015-06-10 | 黄培华 | Stepless speed-regulation slow-reduction air-controlled distribution valve |
| CN103322239A (en) * | 2013-06-26 | 2013-09-25 | 邱金成 | Three-cavity type three-position four-way air-control reversing hydraulic valve |
| CN108506267A (en) * | 2018-05-02 | 2018-09-07 | 宁波真格液压科技有限公司 | A kind of loop choice valve with decompression function |
| CN108506267B (en) * | 2018-05-02 | 2019-11-26 | 宁波真格液压科技有限公司 | A kind of loop choice valve with decompression function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206874583U (en) | A kind of aerial work platform hydraulic energy-saving system | |
| CN206035914U (en) | Four jar synchronous hydraulic system of automobile elevator | |
| CN206872378U (en) | A kind of aerial work platform hydraulic energy-saving system with no-load protection | |
| CN201203530Y (en) | Supercharging device of emulsifiable solution valve integrated test stand | |
| CN202482016U (en) | Diesel fork lift truck hydraulic system with safety protection mechanism | |
| CN110228774A (en) | A kind of fork truck and forklift door frame hydraulic system for lifting | |
| CN201425044Y (en) | Pneumatic reversing valve for dump trucks | |
| CN102674210B (en) | Lift converging multiway valve | |
| CN103671295B (en) | A kind of enclosed energy storage hydraulic system | |
| CN201909095U (en) | Electro-hydraulic linkage actuating mechanism | |
| CN102951557B (en) | Hydraulic system used for elevating mechanism | |
| CN202754726U (en) | Jacking hydraulic system of tower crane | |
| CN215444561U (en) | Synchronous hydraulic system of series cylinder | |
| CN201679791U (en) | Oil cylinder with controllable mechanical output force | |
| CN201693796U (en) | Multipurpose pressure device | |
| CN202612248U (en) | Combined-type hydraulic cylinder | |
| CN203486777U (en) | Single-rail crane hydraulic control device | |
| CN110862047A (en) | Hydraulic control device and method for explosion-proof synchronous circuit for elevator | |
| CN201971591U (en) | Overload protection electrohydraulic jack for vehicles | |
| CN202465177U (en) | Electro-hydraulic jack with descending blocking prevention device | |
| CN202483996U (en) | Cooling protection device for hydraulic reversing system | |
| CN202465171U (en) | Vehicle dual-purpose hydroelectric jack for preventing descending resistance | |
| CN111997945A (en) | Hydraulic system for automobile lifter | |
| CN200993253Y (en) | Electric controlled integrated non-return valve | |
| CN2195013Y (en) | Hydraulic control butterfly valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100317 Termination date: 20150519 |
|
| EXPY | Termination of patent right or utility model |