CN202657851U - Mast lifting follow-up control device - Google Patents
Mast lifting follow-up control device Download PDFInfo
- Publication number
- CN202657851U CN202657851U CN 201220092009 CN201220092009U CN202657851U CN 202657851 U CN202657851 U CN 202657851U CN 201220092009 CN201220092009 CN 201220092009 CN 201220092009 U CN201220092009 U CN 201220092009U CN 202657851 U CN202657851 U CN 202657851U
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- China
- Prior art keywords
- luffing
- oil pump
- mast
- jacking
- valve
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- Expired - Lifetime
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Abstract
The utility model relates to a mast lifting follow-up control device for a crawler crane. The device comprises a jacking cylinder, a jacking oil pump, an electromagnetic directional valve, a balanced valve, luffing motor, a luffing reversing valve, a luffing oil pump, an angle sensor, a pressure sensor, a controller and a two-step electric control handle, Wherein the jacking oil pump is a metering pump, the luffing reversing valve is an electric proportional reversing valve, and the luffing oil pump is an electric proportional control pump; the two-step electric control handle, the angle sensor and the pressure sensor are respectively connected with the input end of the controller; and the output end of the controller is respectively connected with the electromagnetic directional valve, the luffing reversing valve and the luffing oil pump. The mast lifting follow-up control device works in a cargo boom assembly and disassembly mode, the electromagnetic directional valve and the luffing reversing valve are controlled by the two-step electric control handle, so that retraction of a cylinder piston and rope contraction and release of a luffing winch can act at the same time, and the speed for contracting and releasing rope can be automatically adjusted according to the corner position of the mast. When the cargo boom is assembled and disassembled, the luffing steel wire rope is contracted and released in time in the process that the cylinder pushes the mast to lift, so that the effect of synchronously operation along with mask lifting can be achieved.
Description
One, technical field
The utility model relates to a kind of caterpillar crane mast lifting follow-up control device, is mainly used in the mast lifting process of crane arm mounting or dismounting operating mode the control to variable-amplitude steel wire rope folding and unfolding speed.
Two, background technology
During the crawler crane assembling, before and after the crane arm mounting or dismounting, mast need to carry out lifting with the mast lifting body.In the mast lifting process, be wrapped in successively the variable-amplitude steel wire rope folding and unfolding with the mast lifting between mast top movable pulley and the turntable afterbody fixed pulley.Variable-amplitude steel wire rope should be in puts when rope pine slightly, and slightly tight state during rope closing can not be too tight, too pine.Variable-amplitude steel wire rope is lax, and many multiplying powers steel cable easily is intertwined, and causes disorder cable; The variable-amplitude steel wire rope tension, rotary resistance increases, and the thrust of jacking cylinder and bearing force increase, and because assembly pulley power amplification, the increase that single rope tension is small can make cylinder thrust sharply increase, and mast need to bear larger load.
Be to guarantee the mast job safety, when the oil cylinder pushing mast rotated, variable-amplitude steel wire rope was wanted timely folding and unfolding, to realize with the mast effect that is synchronized with the movement.Do not have special arrangement at crawler crane at present the synchronization action of mast hoisting system is regulated control.
Three, summary of the invention
The purpose of this utility model provides the in time folding and unfolding of a kind of variable-amplitude steel wire rope, can be with the mast lifting follow-up control device of mast lifting synchronization action.
The technical solution adopted in the utility model is: mast lifting follow-up control device comprises jacking cylinder, jacking oil pump, solenoid directional control valve, balance cock, luffing motor, luffing change-over valve, luffing oil pump, angular transducer, pressure sensor and controller, the cylinder body base of jacking cylinder is hinged on the turntable, one end of its piston rod is hinged on the carriage, the luffing winch is fixed on the turntable frame, and variable-amplitude steel wire rope is wrapped between mast top movable pulley and the turntable afterbody fixed pulley successively.Jacking oil pump is fix-displacement pump, and the luffing change-over valve is electric proportional reversing valve, and the luffing oil pump is the electric proportional control pump, and pump capacity is directly proportional with intensity of current and control able to programme; It also comprises two electric control handles, and two electric control handles, angular transducer and pressure sensors respectively connect the controller input end, and controller output end connects respectively solenoid directional control valve, luffing change-over valve and luffing oil pump.The utility model has the hydraulic efficiency pressure system of two individual drive: jacking oil pump drives two jacking cylinders, and cylinder thrust acts on the mast by carriage; The luffing oil pump drives the luffing motor, drives reel by the luffing motor through reductor again and rotates.When variable-amplitude steel wire rope tightens up, mast top is produced pulling force.Jacking oil pump is installed in the rear end of luffing oil pump, and jacking oil pump and luffing oil pump adopt axis to drive, and have guaranteed that jacking oil pump is identical with luffing oil pump input speed.
The utility model is worked under crane arm mounting or dismounting pattern, controls simultaneously solenoid directional control valve and luffing change-over valve with two electric control handles, so that oil cylinder piston is flexible and the retractable rope action of luffing elevator is carried out simultaneously.Mast is provided with angular transducer, and hydraulic circuit is provided with pressure sensor, but Real-Time Monitoring mast angle and hydraulic working oil pressure.
In the mast lifting process, angular transducer detects the angle position that mast rotates in real time, and pressure sensor detects the working oil pressure in the large chamber of oil cylinder in real time, and with detected value input control device.Controller carries out analyzing and processing according to the angle of handle instruction, mast and the working oil pressure in the large chamber of oil cylinder, then controls current signal to automatically controlled mouthful of adjustment pump of luffing oil pump control electric current by controller output.By adjusting pump capacity, the withdrawing rope speed of control luffing winch.When realizing the crane arm Assembly ﹠Disassembly, in the oil cylinder pushing mast lifting process, in time folding and unfolding of variable-amplitude steel wire rope reaches the effect with mast lifting synchronized operation.
Four, description of drawings
Fig. 1 is mast installation path of motion schematic diagram of the present utility model, α among the figure---mast corner; α
1---one-level oil cylinder stroke stop bit mast corner; α
2---the stroke stop bit mast corner α of two-level oil cylinder
3---crane arm installation or removal position mast corner;
Fig. 2 is hydraulic schematic diagram of the present utility model.
Five, the specific embodiment
The utility model forms mast jacking oil circuit by jacking cylinder 3, jacking oil pump 8, solenoid directional control valve 9 and balance cock 10.The cylinder body of jacking cylinder 3 and turntable 1 are hinged, and an end and the carriage 2 of its piston are hinged.When cylinder thrust acted on the mast 5 by carriage 2, mast rotated around the O point.Form luffing lifting oil circuit by luffing oil pump 14, luffing change-over valve 13, luffing motor 12.Variable-amplitude steel wire rope 7 on the luffing lifting drum is wrapped between mast top movable pulley and the turntable afterbody fixed pulley successively.During mast 5 lifting, luffing winch 6 rotates emits or regains variable-amplitude steel wire rope 7.
Select crane arm mounting or dismounting mode of operation, control simultaneously solenoid directional control valve 9 and 13 commutations of luffing change-over valve with two electric control handles.Realize a handle action, jacking cylinder 8 and luffing motor 12 hydraulic circuits are connected simultaneously, and oil cylinder piston is flexible to carry out synchronously with the retractable rope action of luffing elevator.
Mast 5 is provided with angular transducer 4, and jacking cylinder 3 large chamber oil circuits are provided with pressure sensor 11.Two electric control handles, angular transducers 4 are connected with pressure sensor and are connected with the input end of controller respectively, and automatically controlled mouthful that the mouth of controller is connected with solenoid directional control valve 9, luffing change-over valve 13 and luffing oil pump respectively is connected.Angular transducer and pressure sensor are with detected value input control device, controller carries out analyzing and processing according to the handle instruction to detected value, then adjust pump capacity by controller output control current signal to automatically controlled mouthful of Y5 of luffing pump, realize automatically adjusting the speed of luffing winch folding and unfolding steel cable.
Under the crane arm mounting or dismounting pattern, the mast servo-actuated control process that hoists: two electric control handles send the mast instruction that hoists, the Y1 mouth of solenoid directional control valve 9 and the Y3 mouth of luffing change-over valve 13 simultaneously electric, the left position of two valves oil circuit is connected simultaneously.Jacking cylinder 3 large chambeies are advanced the pressure oil pushing piston and are stretched out jacking mast 5, mast 5 rotates counterclockwise, luffing motor 12 decline sides are advanced pressure oil simultaneously, winch rotates emits steel rope, controller is adjusted the current value of pump control mouth Y5 according to the mast angle position, variable-amplitude steel wire rope rotates with mast and constantly emits.When rope speed lagged behind, variable-amplitude steel wire rope tension mast produced resistance.Draw tightlyer, resistance is larger, the increase of cylinder jacking pressure, and controller sends to increase and controls current signal according to the force value that pressure sensor detects, and the luffing oil pump increases discharge capacity, and luffing is put the rope speed quickening.When the luffing rope speed was leading, the luffing rope was lax, and cylinder jacking pressure reduces, and controller is according to the force value that pressure sensor detects, and sent to reduce to control current signal, and the luffing oil pump reduces discharge capacity, and luffing is put rope speed and slowed down.
Under the crane arm mounting or dismounting pattern, the mast servo-actuated control process that lands: two electric control handles send mast landing instruction, the Y2 mouth of solenoid directional control valve 9 and the Y4 mouth of luffing change-over valve 13 simultaneously electric, right oil circuit of two valves connected simultaneously.Jacking cylinder 3 large chambeies are through balance cock 10 oil returns, and press so that mast only depends on deadweight not descend large back lining, but by luffing winch rope closing, haul mast and clockwise rotate, the mast compression piston, and piston is regained step by step.Solenoid directional control valve 9 arranges restriction at the large chamber of oil cylinder oil return line, limits the piston retraction speed, and when luffing rope closing speed was fast, large cavity pressure increased, and controller sends and reduces to control current signal, and the luffing oil pump reduces discharge capacity, and luffing is put rope speed and slowed down.
Claims (2)
1. mast lifting follow-up control device, comprise jacking cylinder (3), jacking oil pump (8), solenoid directional control valve (9), balance cock (10), luffing motor (12), luffing change-over valve (13), luffing oil pump (14), angular transducer (4), pressure sensor (11) and controller, the cylinder body base of jacking cylinder (3) is hinged on the turntable (1), one end of its piston rod is hinged on the carriage (2), luffing winch (6) is fixed on turntable (1) frame, variable-amplitude steel wire rope (7) is wrapped between mast top movable pulley and the turntable afterbody fixed pulley successively, it is characterized in that: jacking oil pump (8) is fix-displacement pump, luffing change-over valve (13) is electric proportional reversing valve, and luffing oil pump (14) is the electric proportional control pump; It also comprises two electric control handles, two electric control handles, angular transducers (4) are connected 11 with pressure sensor) connect respectively the controller input end, controller output end connects respectively solenoid directional control valve (9), luffing change-over valve (13) and luffing oil pump (14).
2. a kind of mast lifting follow-up control device according to claim 1, it is characterized in that: jacking oil pump (8) is installed in the rear end of luffing oil pump (14), and jacking oil pump (8) and luffing oil pump (14) adopt axis to drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220092009 CN202657851U (en) | 2012-03-12 | 2012-03-12 | Mast lifting follow-up control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220092009 CN202657851U (en) | 2012-03-12 | 2012-03-12 | Mast lifting follow-up control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202657851U true CN202657851U (en) | 2013-01-09 |
Family
ID=47452772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220092009 Expired - Lifetime CN202657851U (en) | 2012-03-12 | 2012-03-12 | Mast lifting follow-up control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202657851U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103058060A (en) * | 2013-02-04 | 2013-04-24 | 中联重科股份有限公司 | Method, equipment and system for controlling crane and hoisting arm thereof |
| CN103130099A (en) * | 2013-03-11 | 2013-06-05 | 徐工集团工程机械股份有限公司 | Crawler crane mast lifting hydraulic control system and method |
| CN103663152A (en) * | 2013-12-05 | 2014-03-26 | 中联重科股份有限公司 | Mast rising-falling control system, method and apparatus, super-lift apparatus and crane |
| CN104591016A (en) * | 2015-01-15 | 2015-05-06 | 徐工集团工程机械股份有限公司 | Mast luffing system for crane and crane |
| CN105060137A (en) * | 2015-08-03 | 2015-11-18 | 河南省三马起重机械有限公司 | No-explosionproof valve lifting system of crawler crane |
| CN108609499A (en) * | 2018-02-28 | 2018-10-02 | 太原重工股份有限公司 | Mast automatic lifting control method and crane in this way |
| CN109356893A (en) * | 2018-10-11 | 2019-02-19 | 武汉船用机械有限责任公司 | The hydraulic control system of luffing loop wheel machine |
-
2012
- 2012-03-12 CN CN 201220092009 patent/CN202657851U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103058060A (en) * | 2013-02-04 | 2013-04-24 | 中联重科股份有限公司 | Method, equipment and system for controlling crane and hoisting arm thereof |
| CN103058060B (en) * | 2013-02-04 | 2015-10-28 | 中联重科股份有限公司 | Hoisting crane and arm control method, equipment and system |
| CN103130099A (en) * | 2013-03-11 | 2013-06-05 | 徐工集团工程机械股份有限公司 | Crawler crane mast lifting hydraulic control system and method |
| CN103130099B (en) * | 2013-03-11 | 2015-02-18 | 徐工集团工程机械股份有限公司 | Crawler crane mast lifting hydraulic control system and method |
| CN103663152A (en) * | 2013-12-05 | 2014-03-26 | 中联重科股份有限公司 | Mast rising-falling control system, method and apparatus, super-lift apparatus and crane |
| CN103663152B (en) * | 2013-12-05 | 2015-06-03 | 中联重科股份有限公司 | Mast rising-falling control system, method and apparatus, super-lift apparatus and crane |
| CN104591016A (en) * | 2015-01-15 | 2015-05-06 | 徐工集团工程机械股份有限公司 | Mast luffing system for crane and crane |
| CN105060137A (en) * | 2015-08-03 | 2015-11-18 | 河南省三马起重机械有限公司 | No-explosionproof valve lifting system of crawler crane |
| CN108609499A (en) * | 2018-02-28 | 2018-10-02 | 太原重工股份有限公司 | Mast automatic lifting control method and crane in this way |
| CN108609499B (en) * | 2018-02-28 | 2019-09-27 | 太原重工股份有限公司 | Mast automatic lifting control method and crane in this way |
| CN109356893A (en) * | 2018-10-11 | 2019-02-19 | 武汉船用机械有限责任公司 | The hydraulic control system of luffing loop wheel machine |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |