CN202643188U - Hydraulic pilot control loop with enabling keys for revolving of railway crane - Google Patents
Hydraulic pilot control loop with enabling keys for revolving of railway crane Download PDFInfo
- Publication number
- CN202643188U CN202643188U CN 201220302425 CN201220302425U CN202643188U CN 202643188 U CN202643188 U CN 202643188U CN 201220302425 CN201220302425 CN 201220302425 CN 201220302425 U CN201220302425 U CN 201220302425U CN 202643188 U CN202643188 U CN 202643188U
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Abstract
The utility model discloses a hydraulic pilot control loop with enabling keys for revolving of a railway crane, belonging to hydraulic transmission systems. The hydraulic pilot control loop is characterized in that a main pump, a hydraulic-control main reversing valve and a rotary motor constitute a main oil circuit to supply an oil source, control the oil inlet/outlet direction of the motor and determine the rotation direction of the motor; and a control pump, an electromagnetic overflow valve, a pilot handle with the enabling keys, two electromagnetic reversing valves, a brake release valve, a brake and a hydraulic control port of a hydraulic-control main reversing valve constitute a pilot control oil circuit to control the moving direction of a valve core of the hydraulic-control main reversing valve and the on-off of the oil circuit of the brake release valve, only by pressing the enabling keys of the pilot handle at the same time to electrify the two electromagnetic reversing valves, can the valve core of the hydraulic-control main reversing valve be moved and the oil circuit of the brake release valve be connected, the motor brake is turned on so that the motor can rotate to drive a rotary mechanism to operate, any misoperation of touching the handle cannot result in the rotation of a turntable on a railway crane, and thus, the safety performance of the rotation operation of the railway crane is improved greatly.
Description
Technical field
The utility model is a kind of for the rotating band enable key of locomotive crane Hydraulic guide control loop, belongs to power hydraulic system.
Background technology
In the locomotive crane hydraulic efficiency pressure system, under normal circumstances, when two solenoid directional control valves are all switched on, opening of operation hydraulic pilot handle control liquid controlled reversing valve core of main valve moving direction and trainstop, thereby control rotary motor hand of rotation, and then finish the change of swing type mechanism state, the revolution of turntable in the realization.During the operation of locomotive crane lift heavy, when upper rotation of rotary table to certain position, and do not reach operating mode restriction rotary position, if any one misoperation that may run into control revolution pilot handle appears in driver self, particularly under the more thick and heavy prerequisite of clothes in winter, when the driver stands up to observe peripheral situation, thick and heavy clothes causes the possibility of hydraulic pilot handle misoperation larger in relatively narrow and small driver's cab, this class misoperation will cause being in that turntable rotates on the hoisting crane of lift heavy operating condition, rotate when occuring, the driver may be at all for understanding the hoisting crane surrounding condition.Therefore in the urgent need to the safety facilities in exploitation locomotive crane revolution operation field, with from equipping upper lifting and guaranteeing the safety of operation.
The utility model content
The purpose of this utility model provides a kind of for the rotating band enable key of locomotive crane Hydraulic guide control loop, with simple and direct connecting line and operation, and the safety performance when improving locomotive crane revolution operation.
The utility model is achieved through the following technical solutions:
A kind of for the rotating band enable key of locomotive crane Hydraulic guide control loop, comprise fuel tank, main pump, control pump, liquid controlled reversing main valve, electromagnetic relief valve, with the pilot handle of enable key, solenoid directional control valve, drg Dump valve, drg, the motor of rotation of rotary table on the driving locomotive crane is by main pump, liquid controlled reversing main valve and rotary motor form working connection, main pump provides oil sources, and liquid controlled reversing main valve control motor passes in and out oily direction, to determine the motor hand of rotation; By control pump, electromagnetic relief valve, pilot handle with enable key, two solenoid directional control valves, the drg Dump valve, drg and liquid controlled reversing main valve hydraulic control mouth form the pilot control oil circuit, the moving direction of pilot control oil circuit control liquid controlled reversing valve core of main valve, the break-make of drg Dump valve oil circuit, with the hand of rotation of definite motor and the change of halted state, because the pilot handle in the pilot control oil circuit is provided with enable key, so, only have when while push enable key and pilot handle, could be in the control oil process pilot handle arrival solenoid directional control valve that control pump provides, two solenoid directional control valves are all located to get electricity condition, control oil can arrive drg Dump valve oil circuit and liquid controlled reversing main valve hydraulic control mouth through solenoid directional control valve, opens motor brake, promotes valve core of main valve and moves commutation, thereby the pressure oil that main pump is provided arrives the motor oil inlet, drive rotation of rotary table on the locomotive crane by revolution, otherwise turntable can't turn round on the locomotive crane.
The utility model pipeline connects simple and direct clear, locomotive crane is opened after the warming-up exercise, press simultaneously the enable key of hydraulic pilot handle, two solenoid directional control valves get electric, liquid controlled reversing main valve ability moving valve core, drg Dump valve oil circuit could be connected, and then open motor brake, motor just can rotarily drive swing type mechanism and fulfil assignment, therefore, as long as do not press the pilot handle enable key, the driver exists any maloperation of running into handle can not cause turntable to rotate in spacing scope, thereby avoid the generation of safety misadventure, the safety performance when greatly having improved locomotive crane revolution operation.
Description of drawings
Fig. 1 is the utility model hydraulic control system oil circuit connection diagram.
The specific embodiment
How now further specify by reference to the accompanying drawings the utility model implements:
The utility model is a kind of for the rotating band enable key of locomotive crane Hydraulic guide control loop, comprise main pump 1, control pump 2, fuel tank 11, rotary motor 10, electromagnetic relief valve 3,4, two four-way electromagnetic reversing valves of hydraulic pilot handle with enable key: solenoid directional control valve 5 and 6, drg Dump valve 7, three six logical liquid controlled reversing main valves 8, motor brake 9.The variation of rotary motor 10 left revolutions, right-hand rotation and three states that stop operating is by pilot control oil circuit a and working connection b is collaborative finishes.Pilot control oil circuit a comprises control pump 2, and electromagnetic relief valve 3 is with 4, two solenoid directional control valves 5 of pilot handle and 6 of enable key, drg Dump valve 7, two hydraulic control mouths of drg 9 and liquid controlled reversing main valve 8.The spool moving direction of pilot control oil circuit a control hydraulic control main valve 8, the break-make of drg Dump valve oil circuit are with the hand of rotation of determining motor and stop; The pressure of pilot control oil circuit a is determined and kept to electromagnetic relief valve 1; With the hydraulic pilot handle of enable key, need in driving handle, press enable key and could provide required pressure and flow to the loop; Solenoid directional control valve 5,6 is as safety valve, when warming-up exercise is opened and is pressed the pilot handle enable key, be in "on" position, control oil can pass through and arrive drg Dump valve and main valve hydraulic control mouth, motor can normally rotate, when upper rotation of rotary table to restriction site, the solenoid directional control valve dead electricity, oil circuit control cuts off, and motor stops the rotation; The break-make of drg Dump valve 7 is controlled opening and braking of drg 9; The braking of drg 9 is finished by self spring reset.Working connection comprises main pump 1, liquid controlled reversing main valve 8 and rotary motor 10, and working connection b provides pressure and flow for the rotation of rotary motor, and main pump 1 provides oil sources, build-up pressure and flow for the motor rotation; Three six logical liquid controlled reversing main valve 8 spool Median Functions are the Y type, i.e. meta off-load, and oil circuit control a determines the spool moving direction, the control motor passes in and out oily direction, to determine the motor hand of rotation.
After the warming-up exercise of locomotive crane is opened, set up the operation pressure of hydraulic circuit, if do not press enable key and inoperation pilot handle 4, at this moment, the control oil that the upper control pump 2 of pilot control oil circuit a provides flows back to fuel tank 11 through pilot handle 4, solenoid directional control valve 5 and 6, drg Dump valve 7 and liquid controlled reversing main valve 8 hydraulic control mouths all pass through without control oil, therefore, hydraulic control main valve 8 on the working connection b is in the meta unloading condition, the pressure oil that main pump 1 provides can not arrive rotary motor 10 oil inlets, but directly from main valve 8 meta off-load oil sump tanks; If do not press enable key but operated pilot handle 4, at this moment, the control oil that the upper control pump 2 of pilot control oil circuit a provides arrives solenoid directional control valve 5 or 6 through pilot handle 4, but owing to do not press enable key, solenoid directional control valve 5 and 6 all is in power failure state, the path of control oil is blocked at the solenoid directional control valve place, drg Dump valve 7 and liquid controlled reversing main valve 8 hydraulic control mouths all pass through without control oil, therefore, hydraulic control main valve 8 on the working connection b still is in the meta unloading condition, the pressure oil that main pump 1 provides can not arrive rotary motor 10 oil inlets, but directly from main valve meta off-load oil sump tank.
After the warming-up exercise of locomotive crane is opened, the operated pilot handle is to left revolution correspondence position when pressing the pilot handle enable key, the control presssure oil of control pump 2 outputs at first arrives solenoid directional control valve 6 through pilot handle a1 hydraulic fluid port, then divide two-way, one the tunnel enters liquid controlled reversing main valve 8 the next hydraulic control mouth a1 ', the control main valve is from the meta commutation to the next, and the drg Dump valve 7 of leading up to enters drg 9 and promotes brake spring opens drg, for the rotation of motor 10 is prepared; The pressure oil of simultaneously main pump 1 output is through the liquid controlled reversing main valve 8 the next c hydraulic fluid ports that enter motor 10; motor 10 left-hand revolutions; the left revolution of turntable in the drive; when a upper turntable left side returns back to restriction site; solenoid directional control valve 4 dead electricity, liquid controlled reversing main valve 8 commutates to meta from the next, the pressure oil off-load that main pump 1 provides; rotary motor 10 stops the rotation, and plays the effect of safety guard-safeguard.The operated pilot handle is to the right-hand rotation correspondence position when pressing the pilot handle enable key, the control presssure oil of control pump 2 outputs at first arrives solenoid directional control valve 5 through pilot handle b1 hydraulic fluid port, then divide two-way, one the tunnel enters liquid controlled reversing main valve 8 upper hydraulic control mouth b1 ', the control main valve is from the meta commutation to upper, the drg Dump valve 7 of leading up to enters drg 9 and promotes brake spring opens drg, for the rotation of motor 10 is prepared; The pressure oil of simultaneously main pump 1 output is through the liquid controlled reversing main valve 8 upper d hydraulic fluid ports that enter motor 10, motor 10 clickwises, turntable right-hand rotation in the drive, upper turntable right-hand rotation is during to restriction site, solenoid directional control valve 5 dead electricity, liquid controlled reversing main valve 8 commutates to meta from upper, the pressure oil off-load that main pump 1 provides, and rotary motor 10 stops the rotation.By with the pilot handle of enable key control solenoid directional control valve 5,6 electric power failure state, the left revolution of turntable in the realization that goes round and begins again, stop, right-hand rotation.Thereby reach the purpose of this utility model.Safety control function of the present utility model also can be used for other loops of locomotive crane, such as luffing, extendable weight, hoisting arm expansion, winding lifting etc.; The corresponding pilot control of the construction machinery product loop that also can be used for similar locomotive crane.
Claims (1)
1. one kind is used for the rotating band enable key of locomotive crane Hydraulic guide control loop, comprises fuel tank, main pump, control pump, liquid controlled reversing main valve, electromagnetic relief valve, with the pilot handle of enable key, solenoid directional control valve, drg Dump valve, drg, the motor of rotation of rotary table on the driving locomotive crane is by main pump, liquid controlled reversing main valve and rotary motor form working connection, main pump provides oil sources, and liquid controlled reversing main valve control motor passes in and out oily direction, to determine the motor hand of rotation; By control pump, electromagnetic relief valve, pilot handle with enable key, two solenoid directional control valves, the drg Dump valve, drg and liquid controlled reversing main valve hydraulic control mouth form the pilot control oil circuit, the moving direction of pilot control oil circuit control liquid controlled reversing valve core of main valve, the break-make of drg Dump valve oil circuit, with the hand of rotation of definite motor and the change of halted state, it is characterized in that the pilot handle in the pilot control oil circuit is provided with enable key, only have when while push enable key and pilot handle, when could arrive solenoid directional control valve through pilot handle at the control oil that control pump provides, two solenoid directional control valves are all located to get electricity condition, and control oil can arrive drg Dump valve oil circuit and liquid controlled reversing main valve hydraulic control mouth through solenoid directional control valve, open motor brake, promote valve core of main valve and move commutation, thereby the pressure oil that main pump is provided arrives the motor oil inlet, drives rotation of rotary table on the locomotive crane by revolution, otherwise turntable can't turn round on the locomotive crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220302425 CN202643188U (en) | 2012-06-26 | 2012-06-26 | Hydraulic pilot control loop with enabling keys for revolving of railway crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220302425 CN202643188U (en) | 2012-06-26 | 2012-06-26 | Hydraulic pilot control loop with enabling keys for revolving of railway crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202643188U true CN202643188U (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220302425 Expired - Lifetime CN202643188U (en) | 2012-06-26 | 2012-06-26 | Hydraulic pilot control loop with enabling keys for revolving of railway crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202643188U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111606228A (en) * | 2020-04-08 | 2020-09-01 | 武汉船用机械有限责任公司 | Hydraulic control system of crane |
| CN112938794A (en) * | 2021-03-02 | 2021-06-11 | 徐工集团工程机械股份有限公司建设机械分公司 | Automatic control method and device for crane rotation parking braking system |
-
2012
- 2012-06-26 CN CN 201220302425 patent/CN202643188U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111606228A (en) * | 2020-04-08 | 2020-09-01 | 武汉船用机械有限责任公司 | Hydraulic control system of crane |
| CN112938794A (en) * | 2021-03-02 | 2021-06-11 | 徐工集团工程机械股份有限公司建设机械分公司 | Automatic control method and device for crane rotation parking braking system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201016 Address after: 430056 office building, No.777, Zhuankou Road, Wuhan Economic and Technological Development Zone, Wuhan City, Hubei Province Patentee after: Wuqiao Industrial Equipment Co.,Ltd. Address before: 430056 No. 777, Zhuankou Road, Wuhan economic and Technological Development Zone, Hubei, China Patentee before: WUHAN BRIDGE HEAVY INDUSTRIES GROUP Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |
|
| CX01 | Expiry of patent term |