CN102278331A - Multi-way directional valve for lorry-mounted crane and control method thereof - Google Patents
Multi-way directional valve for lorry-mounted crane and control method thereof Download PDFInfo
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- CN102278331A CN102278331A CN201110169262A CN201110169262A CN102278331A CN 102278331 A CN102278331 A CN 102278331A CN 201110169262 A CN201110169262 A CN 201110169262A CN 201110169262 A CN201110169262 A CN 201110169262A CN 102278331 A CN102278331 A CN 102278331A
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Abstract
The invention relates to a multi-way directional valve for a lorry-mounted crane and a control method thereof, belonging to multi-way valves for engineering machinery and control methods thereof. A first secondary pressure-limiting valve is connected with a load opening A1 and a loading opening B1 of a rotary reversing valve, a first main overflow valve is connected with an oil pump opening P1 of the multi-way directional valve for the lorry-mounted crane, and a second main overflow valve is connected with an oil pump opening P2 of the multi-way directional valve for the lorry-mounted crane; a first load retaining valve, a second load retaining valve and a third load retaining valve are respectively connected with oil inlets of the rotary reversing valve, a flexible reversing valve and a luffing reversing valve, and a check valve is connected with an oil inlet of a hoisting double-pump confluence reversing valve; and the rotary reversing valve is connected in series with the hoisting double-pump confluence reversing valve, and the flexible reversing valve and the luffing reversing valve are connected in parallel and then are connected in series with the hoisting double-pump confluence reversing valve. The multi-way directional valve for the lorry-mounted crane, disclosed by the invention, has the advantages that: the conversion between high speed and slow speed can be realized on a hoisting unit according to the difference of operating conditions by aiming to the difference of characteristics of each moving mechanism of the lorry-mounted crane, thus the work efficiency is improved and the micromotion performance is also taken into account.
Description
Technical field
The present invention relates to a kind of engineering machinery with multi-way valve and controlling method, particularly a kind of lorry-mounted crane is with multiple directional control valve and controlling method.
Background technique
Multiple directional control valve is the combination brake switch and proporting based on plural selector valve, according to the requirement of different hydraulic systems, also relief valve, one-way valve etc. also can be combined in the valve, is mainly used on the various engineering machinery, carries out the centralized control of a plurality of executive components.
General lorry-mounted crane multiple directional control valve, each connection is three bit manipulations, and has only a filler opening, can only use single metering pump fuel feeding, this causes: 1, rotating at a slow speed, function that stable operation requires rapidly and efficiently to be moved with flexible and luffing produces contradiction, can not realize simultaneously; 2, hoist motor can only be operated under the speed, can not take into account rapidly and efficiently the requirement with the fine motion location simultaneously; 3, car load can only move by simply connected, and car load efficient is too low.If use the variable displacement pump fuel feeding, it is too high that car load increases cost, has a strong impact on the cost performance of lorry-mounted crane.
Summary of the invention
The objective of the invention is to provide a kind of lorry-mounted crane with multiple directional control valve and controlling method, solve existing lorry-mounted crane and can not use the double pump fuel feeding, can not realize the part body interlock, can not realize the problem of elevator double speed action.
The object of the present invention is achieved like this: this lorry-mounted crane includes the first main relief valve, the first load maintaining valve, slewing directional control valve, first level pressure-limit valve, second subprime pressure-limit valve, one-way valve, elevator double pump interflow selector valve, flexible selector valve, the second load maintaining valve, luffing selector valve, the 3rd load maintaining valve, the second main relief valve with multiple directional control valve;
First time the level pressure-limit valve is connected with the B1 mouth with the load port A1 mouth of slewing directional control valve, the second subprime pressure-limit valve is connected with the B2 mouth with the load port A2 mouth of elevator double pump interflow selector valve, the first main relief valve is connected with multiple directional control valve P1 oil pump mouth with this lorry-mounted crane, and the second main relief valve is connected with multiple directional control valve P2 oil pump mouth with this lorry-mounted crane; The first load maintaining valve, the second load maintaining valve, the 3rd load maintaining valve are connected with the filler opening of slewing directional control valve, flexible selector valve, luffing selector valve respectively, and one-way valve is connected with the filler opening of elevator double pump interflow selector valve; Slewing directional control valve and elevator double pump interflow selector valve are connected in series with elevator double pump interflow selector valve after flexible selector valve 8 and luffing selector valve are connected in parallel for being connected in series.
Controlling method: this lorry-mounted crane elevator double pump interflow selector valve is five bit manipulations, and slewing directional control valve, flexible selector valve and luffing selector valve are three bit manipulations; This lorry-mounted crane adopts float amount metering pump to provide the pressure oil circuit for slewing directional control valve with multiple directional control valve P1 oil pump mouth; This lorry-mounted crane adopts big discharge capacity metering pump to provide the pressure oil circuit for stretch selector valve and luffing selector valve with multiple directional control valve P2 oil pump mouth; Elevator double pump interflow selector valve is double speed control, in the time of at a slow speed, the multiple directional control valve P1 oil pump mouth off-load of this lorry-mounted crane, P2 oil pump mouth provides pressure oil, in the time of fast, this lorry-mounted crane now collaborates with multiple directional control valve P1 oil pump mouth and the cause for gossip of P2 oil pump, is elevator double pump interflow selector valve fuel feeding jointly.
Beneficial effect: owing to adopted above-mentioned principle scheme, this lorry-mounted crane can adopt float amount metering pump to provide the pressure oil circuit for slewing directional control valve 3 with multiple directional control valve P1 oil pump mouth, and realization is turned round at a slow speed, stable operation; This lorry-mounted crane can adopt big discharge capacity metering pump to provide the pressure oil circuit for stretch selector valve and luffing selector valve with multiple directional control valve P2 oil pump mouth, and realization is flexible to be moved fast with luffing; Elevator double pump interflow selector valve can be realized double speed control, in the time of at a slow speed, the multiple directional control valve P1 oil pump mouth off-load of this lorry-mounted crane, P2 oil pump mouth provides pressure oil for elevator double pump interflow selector valve, in the time of fast, this lorry-mounted crane now collaborates with multiple directional control valve P1 oil pump mouth and the cause for gossip of P2 oil pump, is elevator double pump interflow selector valve fuel feeding jointly; Revolution and flexible can the interlock, revolution and luffing can link, and elevator can link with arbitrary motion mechanism.
Advantage: at each motion characteristic difference of lorry-mounted crane, this programme can be realized turning round at a slow speed, stable operation, the quick purpose of moving of flexible and luffing; The elevator connection can be realized fast and conversion at a slow speed according to the operating mode difference, has both improved working efficiency, has taken into account fretting performance simultaneously again; Revolution and flexible can the interlock, revolution and luffing can link, and elevator can link with arbitrary motion mechanism; Moderate cost has reduced the cost burden of complete machine.
Description of drawings
Fig. 1 is a structural drawing of the present invention.
Among the figure, 1, the first main relief valve; 2, the first load maintaining valve; 3, slewing directional control valve; 4, first level pressure-limit valve; 5, second subprime pressure-limit valve; 6, one-way valve; 7, elevator double pump interflow selector valve; 8, flexible selector valve; 9, the second load maintaining valve; 10, luffing selector valve; 11, the 3rd load maintaining valve; 12, the second main relief valve.
Embodiment
Embodiment 1: this lorry-mounted crane includes with multiple directional control valve: this lorry-mounted crane includes the first main relief valve 1, the first load maintaining valve 2, slewing directional control valve 3, second subprime pressure-limit valve 4, second subprime pressure-limit valve 5, one-way valve 6, elevator double pump interflow selector valve 7, flexible selector valve 8, the second load maintaining valve 9, luffing selector valve 10, the 3rd load maintaining valve 11 and the second main relief valve 12 with multiple directional control valve; First time level pressure-limit valve 4 is connected with the B1 mouth with the load port A1 mouth of slewing directional control valve 3, second subprime pressure-limit valve 5 is connected with the B2 mouth with the load port A2 mouth of elevator double pump interflow selector valve 7, the first main relief valve 1 is connected with multiple directional control valve P1 oil pump mouth with this lorry-mounted crane, and the second main relief valve 12 is connected with multiple directional control valve P2 oil pump mouth with this lorry-mounted crane; The first load maintaining valve 2, the second load maintaining valve 9, the 3rd load maintaining valve 11 are connected with the filler opening of slewing directional control valve 3, flexible selector valve 8, luffing selector valve 10 respectively, and one-way valve 6 is connected with the filler opening of elevator double pump interflow selector valve 7; Slewing directional control valve 3 collaborates selector valve 7 for being connected in series with the elevator double pump, is connected in series with elevator double pump interflow selector valve 7 after flexible selector valve 8 and luffing selector valve 10 are connected in parallel.
This lorry-mounted crane elevator double pump interflow selector valve 7 is five bit manipulations, slewing directional control valve 3, flexible selector valve 8 and luffing selector valve 10 are three bit manipulations, can adopt float amount metering pump for slewing directional control valve 3 provides the pressure oil circuit with multiple directional control valve P1 oil pump mouth, reach realize revolution at a slow speed, aim of stable operation; This lorry-mounted crane can adopt big discharge capacity metering pump for stretch selector valve 8 and luffing selector valve 10 provide the pressure oil circuit with multiple directional control valve P2 oil pump mouth, reaches to realize purpose flexible and that luffing moves fast; Elevator double pump interflow selector valve 7 can be realized double speed control, in the time of at a slow speed, the multiple directional control valve P1 oil pump mouth off-load of this lorry-mounted crane, P2 oil pump mouth provides pressure oil, in the time of fast, this lorry-mounted crane now collaborates with multiple directional control valve P1 oil pump mouth and the cause for gossip of P2 oil pump, is elevator double pump interflow selector valve fuel feeding jointly; Revolution and flexible can the interlock, revolution and luffing can link, and elevator can link with arbitrary motion mechanism.
Claims (2)
1. this lorry-mounted crane multiple directional control valve is characterized in that: this lorry-mounted crane includes the first main relief valve, the first load maintaining valve, slewing directional control valve, first level pressure-limit valve, second subprime pressure-limit valve, one-way valve, elevator double pump interflow selector valve, flexible selector valve, the second load maintaining valve, luffing selector valve, the 3rd load maintaining valve, the second main relief valve with multiple directional control valve;
First time the level pressure-limit valve is connected with the B1 mouth with the load port A1 mouth of slewing directional control valve, the second subprime pressure-limit valve is connected with the B2 mouth with the load port A2 mouth of elevator double pump interflow selector valve, the first main relief valve is connected with multiple directional control valve P1 oil pump mouth with this lorry-mounted crane, and the second main relief valve is connected with multiple directional control valve P2 oil pump mouth with this lorry-mounted crane; The first load maintaining valve, the second load maintaining valve, the 3rd load maintaining valve are connected with the filler opening of slewing directional control valve, flexible selector valve, luffing selector valve respectively, and one-way valve is connected with the filler opening of elevator double pump interflow selector valve; Slewing directional control valve and elevator double pump interflow selector valve are connected in series with elevator double pump interflow selector valve after flexible selector valve and luffing selector valve are connected in parallel for being connected in series.
2. this lorry-mounted crane is with the controlling method of multiple directional control valve, and it is characterized in that: this lorry-mounted crane elevator double pump interflow selector valve is five bit manipulations, and slewing directional control valve, flexible selector valve and luffing selector valve are three bit manipulations; This lorry-mounted crane adopts float amount metering pump to provide the pressure oil circuit for slewing directional control valve with multiple directional control valve P1 oil pump mouth; This lorry-mounted crane adopts big discharge capacity metering pump to provide the pressure oil circuit for stretch selector valve and luffing selector valve with multiple directional control valve P2 oil pump mouth; Elevator double pump interflow selector valve is double speed control, in the time of at a slow speed, the multiple directional control valve P1 oil pump mouth off-load of this lorry-mounted crane, P2 oil pump mouth provides pressure oil, in the time of fast, this lorry-mounted crane now collaborates with multiple directional control valve P1 oil pump mouth and the cause for gossip of P2 oil pump, is elevator double pump interflow selector valve fuel feeding jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110169262A CN102278331A (en) | 2011-06-22 | 2011-06-22 | Multi-way directional valve for lorry-mounted crane and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110169262A CN102278331A (en) | 2011-06-22 | 2011-06-22 | Multi-way directional valve for lorry-mounted crane and control method thereof |
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| CN102278331A true CN102278331A (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110169262A Pending CN102278331A (en) | 2011-06-22 | 2011-06-22 | Multi-way directional valve for lorry-mounted crane and control method thereof |
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| CN (1) | CN102278331A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899588A (en) * | 2014-01-17 | 2014-07-02 | 徐州徐工随车起重机有限公司 | Lorry-mounted crane multi-way reversing device and straight arm lorry-mounted crane |
| CN105422530A (en) * | 2014-10-30 | 2016-03-23 | 徐州重型机械有限公司 | Pilot integrated multi-way valve group and crane |
| CN105443481A (en) * | 2014-12-09 | 2016-03-30 | 徐州重型机械有限公司 | Series-parallel crane multitandem valve and hydraulic system and crane |
| CN107504000A (en) * | 2017-10-12 | 2017-12-22 | 徐州徐工随车起重机有限公司 | A kind of lorry-mounted crane multi-way reversing device |
| CN111059087A (en) * | 2019-12-23 | 2020-04-24 | 中联重科股份有限公司 | Power distribution hydraulic system and crane |
| CN113788408A (en) * | 2021-09-24 | 2021-12-14 | 江苏宏昌天马物流装备有限公司 | Load-sensitive multi-way valve with double-pump confluence function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3990352A (en) * | 1974-10-11 | 1976-11-09 | Kabushiki Kaisha Komatsu Seisakusho | Control valve |
| CN2844532Y (en) * | 2005-07-19 | 2006-12-06 | 四川长江液压件有限责任公司 | Multi-path switching valve of hydraulic crane |
| CN201228685Y (en) * | 2008-05-26 | 2009-04-29 | 长治清华机械厂 | Hydraulic system of lorry-mounted crane |
| CN202108803U (en) * | 2011-06-22 | 2012-01-11 | 徐州徐工随车起重机有限公司 | Multi-way reversing valve for lorry-mounted crane |
-
2011
- 2011-06-22 CN CN201110169262A patent/CN102278331A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3990352A (en) * | 1974-10-11 | 1976-11-09 | Kabushiki Kaisha Komatsu Seisakusho | Control valve |
| CN2844532Y (en) * | 2005-07-19 | 2006-12-06 | 四川长江液压件有限责任公司 | Multi-path switching valve of hydraulic crane |
| CN201228685Y (en) * | 2008-05-26 | 2009-04-29 | 长治清华机械厂 | Hydraulic system of lorry-mounted crane |
| CN202108803U (en) * | 2011-06-22 | 2012-01-11 | 徐州徐工随车起重机有限公司 | Multi-way reversing valve for lorry-mounted crane |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899588A (en) * | 2014-01-17 | 2014-07-02 | 徐州徐工随车起重机有限公司 | Lorry-mounted crane multi-way reversing device and straight arm lorry-mounted crane |
| CN105422530A (en) * | 2014-10-30 | 2016-03-23 | 徐州重型机械有限公司 | Pilot integrated multi-way valve group and crane |
| CN105443481A (en) * | 2014-12-09 | 2016-03-30 | 徐州重型机械有限公司 | Series-parallel crane multitandem valve and hydraulic system and crane |
| CN105443481B (en) * | 2014-12-09 | 2018-01-12 | 徐州重型机械有限公司 | Series parallel type crane banked direction control valves, hydraulic system and crane |
| CN107504000A (en) * | 2017-10-12 | 2017-12-22 | 徐州徐工随车起重机有限公司 | A kind of lorry-mounted crane multi-way reversing device |
| CN107504000B (en) * | 2017-10-12 | 2024-01-02 | 徐州徐工随车起重机有限公司 | Multi-way reversing device of lorry-mounted crane |
| CN111059087A (en) * | 2019-12-23 | 2020-04-24 | 中联重科股份有限公司 | Power distribution hydraulic system and crane |
| CN111059087B (en) * | 2019-12-23 | 2021-07-30 | 中联重科股份有限公司 | Power distribution hydraulic system and crane |
| CN113788408A (en) * | 2021-09-24 | 2021-12-14 | 江苏宏昌天马物流装备有限公司 | Load-sensitive multi-way valve with double-pump confluence function |
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Application publication date: 20111214 |