CN104214151B - A kind of dumping car air-over hydraulic - Google Patents
A kind of dumping car air-over hydraulic Download PDFInfo
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- CN104214151B CN104214151B CN201410398285.9A CN201410398285A CN104214151B CN 104214151 B CN104214151 B CN 104214151B CN 201410398285 A CN201410398285 A CN 201410398285A CN 104214151 B CN104214151 B CN 104214151B
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- valve
- pilot operated
- operated check
- check valve
- gas control
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Abstract
The invention discloses a kind of dumping car air-over hydraulic, its adopts the method that is connected in order with gas control one-way valve of Pilot operated check valve, thus avoids the generation of guiding valve and the common card valve fault of rotary valve; All component are arranged in a valve body, compact structure, be convenient to install; Due to the generation of letting out in nothing, achieve railway carriage real in stop, reduction of speed degree of waiting a moment is adjustable; A pilot operated compound relief valve achieves duplicate protection overload and middle stopping time illegal traffic being caused to pier cylinder.It comprises: hand-operated pneumatic control valve, limiting valve, three gas control one-way valves, three Pilot operated check valves, fuel tank, gear pump, one-way valve, elevating ram, pilot operated compound relief valve and slow drop control valves.Three gas control one-way valves, three Pilot operated check valves, one-way valve, pilot operated compound relief valve and slow drop control valves are all arranged in the valve body of Pneumatic and hydraulic lifting valve, connect between each parts through inner passage.The present invention can install when car load is produced, and also can be used for reequiping the vehicle in existing use.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, exactly, it is let out in a kind of nothing, duplicate protection, falls adjustable dumping car air-over hydraulic slowly.
Background technique
At present, both at home and abroad for Tipper Lifting, in stop, to decline and the spool of Pneumatic and hydraulic lifting valve in slow releasing pneuamtic controlled hydraulic system is substantially all sliding type spool or Rotary spool, in actual use, the ubiquitous shortcoming of the spool of these two kinds of forms and deficiency are exactly:
1, let out in: owing to adopting clearance seal, let out and certainly exist within institute, the problem caused is exactly, in railway carriage, the stopping time can slowly decline, stops not living.
2, the core of the card: owing to there being gap, just likely makes microparticle pollutant enter in gap, causes spool clamping stagnation, breaks down.
3, manufacture difficulty is large: because the quality of fit of spool and valve opening is high, so during manufacturing, very high to the required precision of process equipment, also very high to the requirement of the mechanical property of material own.
summary of the invention:
Object of the present invention is exactly solve in above-mentioned prior art the shortcoming and deficiency that exist, provides in a kind of nothing to let out, duplicate protection, fall adjustable dumping car air-over hydraulic slowly.
The present invention is achieved in that dumping car air-over hydraulic comprises: hand-operated pneumatic control valve, limiting valve, three gas control one-way valves, three Pilot operated check valves, fuel tank, gear pump, one-way valve, elevating ram, pilot operated compound relief valve, slow drop control valve, decline gas port, lifting gas port and slow sending down abnormally ascending mouths.The filler opening of gear pump 7 is connected to fuel tank 6, oil outlet is connected with the oil inlet P of Pneumatical hydraulic value 3, Pneumatic and hydraulic lifting valve 3 oil outlet A is connected with elevating ram 9, oil return is got back in fuel tank 6 through the oil return inlet T of Pneumatic and hydraulic lifting valve 3, it is characterized in that: the oil outlet of gear pump 7 is connected with the entrance of one-way valve 8 and the first Pilot operated check valve 5 through the oil inlet P of Pneumatic and hydraulic lifting valve 3, through one-way valve 8, be connected to the filler opening of elevating ram 9 and the filler opening of the second Pilot operated check valve 10, the second gas control one-way valve 11 on the right side of second Pilot operated check valve 10 is connected to hand-operated pneumatic control valve 1 through decline gas port K, the oil outlet of the second Pilot operated check valve 10 is connected with the filler opening of the 3rd Pilot operated check valve 14, the 3rd gas control one-way valve 13 on the right side of 3rd Pilot operated check valve 14 is connected to hand-operated pneumatic control valve 1 through slow sending down abnormally ascending mouth M, the first gas control one-way valve 4 on the right side of first Pilot operated check valve 5 is through lifting gas port S, limiting valve 2 is connected to hand-operated pneumatic control valve 1, the entrance of pilot operated compound relief valve 12 is connected with the second Pilot operated check valve 10, outlet is connected with fuel tank 6 through oil return inlet T, between the entrance that slow drop control valve 15 is connected to the second Pilot operated check valve 10 and oil return inlet T, in parallel with Pilot operated check valve 14.Three gas control one-way valves, three Pilot operated check valves, one-way valve, pilot operated compound relief valve and slow drop control valves are arranged in the valve body of Pneumatic and hydraulic lifting valve.Each Pilot operated check valve and a gas control one-way valve designs are integrated, and spool is built with spring, and front portion is provided with ball valve, is provided with steam-operating piston in gas control one-way valve.
Advantage of the present invention is: adopt the method that Pilot operated check valve is connected in order with gas control one-way valve, constitute a kind of brand-new logic control oil and gas path system, instead of traditional guiding valve or rotary valve artificial lifting way, thus avoid guiding valve and rotary valve common in let out with the generation of card valve fault, decrease rate of fault; All component are arranged in a valve body, compact structure, be convenient to install; Realize tipper carriage lifting, in stop, decline and fall slowly in process, due to the generation of letting out in nothing, achieve railway carriage real in stop; Slow reduction of speed degree can require to adjust according to the difference of user, simple and flexible; The duplicate protection of pier cylinder is caused by overload when achieving lifting while a pilot operated compound relief valve and middle stopping time driver illegal traffic.The present invention can install when car load is produced, and also can be used for reequiping the vehicle in existing use.
Accompanying drawing explanation
Fig. 1 Pneumatic and hydraulic schematic diagram of the present invention.
Fig. 2 A-A sectional structure chart of the present invention.
Fig. 3 external structure of the present invention.
Fig. 4 B-B sectional structure chart of the present invention.
Embodiment
embodiment 1:
Hand-operated pneumatic control valve 1 of the present invention, limiting valve 2, fuel tank 6, gear pump 7, elevating ram 9, ball valve 17,22 and 25, spring 18,21 and 26, one-way valve 8 is prior art; Piston 16,23 and 24, spool 19,20 and 27, slow drop control valve 15, pilot operated compound relief valve 12 can machinedly obtain.
In the present invention, the 3rd Pilot operated check valve 14 and the 3rd gas control one-way valve 13 are also integrated, and structure is identical with the first gas control one-way valve 4 with the first Pilot operated check valve 5, for gas control is open in usual.Second Pilot operated check valve 10 and the second gas control one-way valve 11 are integrated, and are gas control Normally closed types.Wherein 19,20,27 be spool, 18,21,26 springs, 17,22,25 are ball valves, 16,23,24 are pistons.
Working principle of the present invention is as follows: when lifting gas port S is without bleed pressure, and the first gas control one-way valve 4 is normally open (see figure 4).The upper end of the first Pilot operated check valve 5 is without pressure, and hydraulic oil will back down spool 27, and the first Pilot operated check valve 5 is opened.When lifting gas port S has bleed pressure, air propels piston 24 moves down ball valve 25 dieback, and the first gas control one-way valve 4 is closed, and the first Pilot operated check valve 5 upper end forms back pressure, and make pressure at two ends equal, under the effect of spring 26, Pilot operated check valve 5 is closed.
Instantly, when sending down abnormally ascending mouth K is without bleed pressure, the second gas control one-way valve 11 is normal off status (see figure 2).The right-hand member of the second Pilot operated check valve 10 forms back pressure, and make pressure at two ends equal, under the effect of spring 18, the second Pilot operated check valve 10 is closed.Instantly, when sending down abnormally ascending mouth K has a bleed pressure, air propels piston 16 is moved to the left and is backed down by ball valve 17, and the second gas control one-way valve 11 is opened, the right-hand member pressure of the second Pilot operated check valve 10 is released, under the effect of left end pressure, hydraulic oil will back down spool 19, and the second Pilot operated check valve 10 is opened.
When slow sending down abnormally ascending mouth M is without bleed pressure, the 3rd gas control one-way valve 13 is normally open.The right-hand member of the 3rd Pilot operated check valve 14 is without pressure, and under the effect of left end pressure, hydraulic oil will back down spool 20, and the 3rd Pilot operated check valve 14 is opened.When slow sending down abnormally ascending mouth M has bleed pressure, air propels piston 23 is moved to the left ball valve 22 dieback, and the 3rd gas control one-way valve 13 is closed, and the 3rd Pilot operated check valve 14 right-hand member forms back pressure, make pressure at two ends equal, the 3rd Pilot operated check valve 14 is closed under the action of the spring 21.
When hand-operated pneumatic control valve be in middle off-position put time, each gas port is all communicated with relief opening, does not have gas control pressure.First gas control one-way valve 4 is normally open, and the P mouth that the hydraulic oil that gear pump 7 exports enters Pneumatic and hydraulic lifting valve 3 flows back to fuel tank 6 through the first Pilot operated check valve 5 from T mouth.Railway carriage can not by lifting.
When lifting railway carriage, hand-operated pneumatic control valve 1 is switched to lift location, air-flow enters the first gas control one-way valve 4 by limiting valve 2, first gas control one-way valve 4 is closed, the right-hand member of the first Pilot operated check valve 5 forms back pressure, make pressure at two ends equal, make the first Pilot operated check valve 5 close (see figure 1) under spring force.Hydraulic oil now in fuel tank 6 flows through P mouth that gear pump 7 enters Pneumatic and hydraulic lifting valve 3 and is backed down by one-way valve 8 and flow to A mouth and the second Pilot operated check valve 10, now the second gas control one-way valve 11 is closed condition, the right-hand member of the second Pilot operated check valve 10 forms back pressure, second Pilot operated check valve 10 is closed, hydraulic oil now can only jack-up elevating ram 9, thus realizes the lifting of tipper carriage.In lifting railway carriage process; hydraulic oil can act on the input end of pilot operated compound relief valve 12 by the damping hole of the second Pilot operated check valve 10; when pressure is greater than the cracking pressure of setting; pilot operated compound relief valve 12 overflow; now the right-hand member pressure of the second Pilot operated check valve 10 reduces, and left end pressure is greater than right-hand member pressure, and the second Pilot operated check valve 10 can be opened; hydraulic oil flows back to fuel tank 6, achieves overload protection during lifting.
In the stopping time in body lifting needs to a certain working position, hand-operated pneumatic control valve 1 is switched to middle off-position and puts, and each gas port is all communicated with relief opening, does not have bleed pressure.First gas control one-way valve 4 is normally open, if gear pump 7 continues fuel feeding, hydraulic oil can back down the spool of the first Pilot operated check valve 5, flows back to fuel tank 6.Now the second gas control one-way valve 11 is in closed condition, second Pilot operated check valve 10 right-hand member forms back pressure, make pressure at two ends equal, the second Pilot operated check valve 10 will be made under the force of a spring to close, the Action of Gravity Field that one-way valve 8 is now subject to railway carriage is closed condition, hydraulic oil in elevating ram 9 cannot flow back to fuel tank 6, and now railway carriage steadily can be parked in during arbitrary position is referred to as and stop.If there is pier cylinder phenomenon in the course of the work in dumping car; pressure in elevating ram 6 can increase suddenly; hydraulic oil in elevating ram 6 can act on pilot operated compound relief valve 12 by the damping hole of the second Pilot operated check valve 10; pilot operated compound relief valve 12 overflow; cause the right-hand member pressure of the second Pilot operated check valve 10 to reduce, left end pressure is greater than right-hand member, and the hydraulic oil in elevating ram 9 will back down the second Pilot operated check valve 10 and flow back to fuel tank 6; achieve the release of pressure, protect elevating ram 9.
If when body lifting is to the limit position limited, source of the gas can disconnect by limiting valve 2, the right-hand member of the first gas control one-way valve 4 is without bleed pressure, first gas control one-way valve 4 is unlocked, and the right-hand member pressure of the first Pilot operated check valve 5 reduces, and left end pressure is greater than right-hand member pressure, first Pilot operated check valve 5 is opened, the hydraulic oil that gear pump 7 exports by the P mouth of Pneumatic and hydraulic lifting valve, can flow through the first Pilot operated check valve 5, gets back to fuel tank 6 by T mouth.Elevating ram 9 can not by continuation lifting, the Action of Gravity Field that one-way valve 8 is now subject to railway carriage is closed condition, second Pilot operated check valve 10 is also closed condition, hydraulic oil in elevating ram 9 cannot flow back to fuel tank 6, railway carriage steadily can be parked in limit position and be unlikely to be lifted to overturning and cause danger, makes the Security in work be improved like this.
When railway carriage needs to decline, hand-operated pneumatic control valve 1 is switched to lowering position, air-flow will enter the second gas control one-way valve 11, second gas control one-way valve 11 is unlocked, the right-hand member pressure of the second Pilot operated check valve 10 reduces, left end pressure is greater than right-hand member pressure, and the hydraulic oil in elevating ram 9 will back down the second Pilot operated check valve 10, flows through the 3rd Pilot operated check valve 14 and gets back to fuel tank 6.Now, railway carriage declines with elevating ram 9 under gravity.
When needs railway carriage falls slowly, hand-operated pneumatic control valve 1 is switched to and falls position slowly, second gas control one-way valve 11 is opening state, 3rd gas control one-way valve 13 is closed condition, the pressure at two ends of the 3rd Pilot operated check valve 14 is equal will close, at this moment the hydraulic oil in elevating ram 9 can only back down the second Pilot operated check valve 10 by railway carriage Action of Gravity Field, flows through slow drop control valve 15 and gets back in fuel tank 6, achieve and fall slowly.Simultaneously can change speed when railway carriage declines by regulating slow drop control valve 15, meeting the different requirements of user.
Claims (5)
1. a dumping car air-over hydraulic, comprise: hand-operated pneumatic control valve (1), limiting valve (2), three gas control one-way valves and three Pilot operated check valves, fuel tank (6), gear pump (7), one-way valve (8), elevating ram (9), pilot operated compound relief valve (12), slow drop control valve (15), decline gas port (K), lifting gas port (S), slow sending down abnormally ascending mouth (M), the filler opening of gear pump (7) is connected to fuel tank (6), oil outlet is connected with the filler opening (P) of Pneumatic and hydraulic lifting valve (3), Pneumatic and hydraulic lifting valve (3) is by one-way valve (8), pilot operated compound relief valve (12), the parts that slow drop control valve (15) and three gas control one-way valves and three Pilot operated check valves are combined, the oil outlet (A) of Pneumatic and hydraulic lifting valve (3) is connected with elevating ram (9), the return opening (T) of oil return through Pneumatic and hydraulic lifting valve (3) is got back in fuel tank (6), it is characterized in that: the filler opening (P) of oil outlet through Pneumatic and hydraulic lifting valve (3) of gear pump (7) is connected with the entrance of one-way valve (8) and the first Pilot operated check valve (5), through one-way valve (8), be connected to the filler opening of elevating ram (9) and the filler opening of the second Pilot operated check valve (10), the second gas control one-way valve (11) on the second Pilot operated check valve (10) right side is connected to hand-operated pneumatic control valve (1) through decline gas port (K), the oil outlet of the second Pilot operated check valve (10) is connected with the filler opening of the 3rd Pilot operated check valve (14), the 3rd gas control one-way valve (13) on the 3rd Pilot operated check valve (14) right side is connected to hand-operated pneumatic control valve (1) through slow sending down abnormally ascending mouth (M), the first gas control one-way valve (4) on the first Pilot operated check valve (5) right side is through lifting gas port (S), limiting valve (2) is connected to hand-operated pneumatic control valve (1), the entrance of pilot operated compound relief valve (12) is connected with the second Pilot operated check valve (10), outlet is connected with fuel tank (6) through return opening (T), slow drop control valve (15) is connected between the second Pilot operated check valve (10) and return opening (T), in parallel with the 3rd Pilot operated check valve (14).
2. a kind of dumping car air-over hydraulic according to claim 1, it is characterized in that: the first gas control one-way valve (4), the second gas control one-way valve (11) and the 3rd gas control one-way valve (13), the first Pilot operated check valve (5), the second Pilot operated check valve (10) and the 3rd Pilot operated check valve (14), one-way valve (8), pilot operated compound relief valve (12), slow drop control valve (15) are arranged in the valve body of Pneumatic and hydraulic lifting valve (3).
3. a kind of dumping car air-over hydraulic according to claim 1, it is characterized in that: the first Pilot operated check valve (5) and the first gas control one-way valve (4) are integrally, the spool (27) of the first Pilot operated check valve (5) is built with spring (26), the front portion of the first Pilot operated check valve (5) is provided with ball valve (25), is provided with piston (24) in the first gas control one-way valve (4).
4. a kind of dumping car air-over hydraulic according to claim 1, it is characterized in that: the second Pilot operated check valve (10) and the second gas control one-way valve (11) are integrally, the spool (19) of the second Pilot operated check valve (10) is built with spring (18), the front portion of the second Pilot operated check valve (10) is provided with reverse ball valve (17), is provided with piston (16) in the second gas control one-way valve (11).
5. a kind of dumping car air-over hydraulic according to claim 1, it is characterized in that: the 3rd Pilot operated check valve (14) and the 3rd gas control one-way valve (13) are integrally, the spool (20) of the 3rd Pilot operated check valve (14) is built with spring (21), the front portion of the 3rd Pilot operated check valve (14) is provided with ball valve (22), is provided with piston (23) in the 3rd gas control one-way valve (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410398285.9A CN104214151B (en) | 2014-08-14 | 2014-08-14 | A kind of dumping car air-over hydraulic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410398285.9A CN104214151B (en) | 2014-08-14 | 2014-08-14 | A kind of dumping car air-over hydraulic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104214151A CN104214151A (en) | 2014-12-17 |
| CN104214151B true CN104214151B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410398285.9A Expired - Fee Related CN104214151B (en) | 2014-08-14 | 2014-08-14 | A kind of dumping car air-over hydraulic |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB827913A (en) * | 1957-05-03 | 1960-02-10 | Tatra Np | Improvements in and relating to hydraulic lifting devices for tipping vehicles |
| CN101210581A (en) * | 2006-12-28 | 2008-07-02 | 中国国际海运集装箱(集团)股份有限公司 | Self-reducing resisting hydraulic cylinder |
| CN101701591A (en) * | 2009-11-07 | 2010-05-05 | 陈秀林 | Air control lifting selector valve |
| CN201554708U (en) * | 2009-10-22 | 2010-08-18 | 海门市液压件厂有限责任公司 | Pneumatic control hydraulic lifting valve |
| CN203511403U (en) * | 2013-10-31 | 2014-04-02 | 无锡英特帕普威孚液压有限责任公司 | Hydraulic lifting system for self-discharging train |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6699311B2 (en) * | 2001-12-28 | 2004-03-02 | Caterpillar Inc | Hydraulic quick drop circuit |
-
2014
- 2014-08-14 CN CN201410398285.9A patent/CN104214151B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB827913A (en) * | 1957-05-03 | 1960-02-10 | Tatra Np | Improvements in and relating to hydraulic lifting devices for tipping vehicles |
| CN101210581A (en) * | 2006-12-28 | 2008-07-02 | 中国国际海运集装箱(集团)股份有限公司 | Self-reducing resisting hydraulic cylinder |
| CN201554708U (en) * | 2009-10-22 | 2010-08-18 | 海门市液压件厂有限责任公司 | Pneumatic control hydraulic lifting valve |
| CN101701591A (en) * | 2009-11-07 | 2010-05-05 | 陈秀林 | Air control lifting selector valve |
| CN203511403U (en) * | 2013-10-31 | 2014-04-02 | 无锡英特帕普威孚液压有限责任公司 | Hydraulic lifting system for self-discharging train |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104214151A (en) | 2014-12-17 |
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