CN215974702U - Convenient lightweight hoisting equipment luffing mechanism hydraulic control system - Google Patents
Convenient lightweight hoisting equipment luffing mechanism hydraulic control system Download PDFInfo
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- CN215974702U CN215974702U CN202121481120.XU CN202121481120U CN215974702U CN 215974702 U CN215974702 U CN 215974702U CN 202121481120 U CN202121481120 U CN 202121481120U CN 215974702 U CN215974702 U CN 215974702U
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Abstract
The utility model discloses a hydraulic control system of a luffing mechanism of convenient lightweight hoisting equipment, which comprises a pilot valve, a main valve, an electromagnetic proportional pressure reducing valve I and an electromagnetic proportional pressure reducing valve II, wherein the pilot valve is a two-position five-way reversing valve, the main valve is a three-position seven-way hydraulic control valve, the electromagnetic proportional pilot valve I and the electromagnetic proportional valve II are two-position three-way valves, an A port of the pilot valve is connected with a P1 port of the electromagnetic proportional pressure reducing valve I, a P1 port is connected with an A1 port, an A1 port is connected with a left control port on the main valve, a B port of the pilot valve is connected with a P2 port of the electromagnetic proportional pressure reducing valve II, a P2 port is connected with an A2 port, and an A2 port is connected with a right control port of the main valve. The system also comprises a small handle and an original truck crane handle, wherein the small handle is connected with the original truck crane handle through an oil way through a shuttle valve. The system can enable the amplitude variation trolley to run at normal speed, and the small handle and the original truck crane handle are adopted to switch different hoisting operations.
Description
Technical Field
The utility model relates to the technical field of automobile cranes, in particular to a hydraulic control system of a luffing mechanism of a convenient lightweight hoisting device.
Background
The amplitude of the common automobile crane is realized by pitching the main arm, as shown in fig. 2, due to actual operation requirements, an auxiliary arm a is added at the front end of the main arm c, an amplitude-variable trolley b is hung below the auxiliary arm a, and the amplitude-variable trolley b can run back and forth at the lower part of the auxiliary arm a to realize the amplitude-variable function, so that the hoisting working range can be enlarged, and the automobile crane with the amplitude-variable function is called as convenient lightweight hoisting equipment. The power of the amplitude variation trolley b is provided by an auxiliary winch of a common automobile crane, and the speed of a single rope of the auxiliary winch of the common automobile crane is about 135m/min, and the speed of the amplitude variation trolley b is required to be about 25m/min, so the problem of reducing the speed of the amplitude variation trolley b needs to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a hydraulic control system of a luffing mechanism of a convenient lightweight hoisting device, which can realize the speed reduction of an auxiliary hoisting motor on an auxiliary arm so as to ensure that a trolley can normally and stably run.
In order to achieve the purpose, the hydraulic control system for the luffing mechanism of the convenient lightweight hoisting equipment comprises a pilot valve, a main valve, an electromagnetic proportional pressure reducing valve I and an electromagnetic proportional pressure reducing valve II, wherein the pilot valve is a two-position five-way reversing valve, the main valve is a three-position seven-way hydraulic control valve, the electromagnetic proportional pilot valve I and the electromagnetic proportional valve II are two-position three-way valves, a port A of the pilot valve is connected with a port P1 of the electromagnetic proportional pressure reducing valve I, a port P1 is connected with a port A1, a port A1 is connected with a left control port on the main valve, a port B of the pilot valve is connected with a port P2 of the electromagnetic proportional pressure reducing valve II, a port P2 is connected with a port A2, and a port A2 is connected with a right control port of the main valve.
The hydraulic control system further comprises a small handle and an original truck crane handle, wherein the small handle is connected with the original truck crane handle through an oil way of the shuttle valve, and an E port of the shuttle valve is connected with an R1 port of the pilot valve.
Furthermore, the original truck crane handle is connected with the shuttle valve through a two-position two-way reversing valve.
The utility model has the beneficial effects that: the electric proportional pressure reducing valve is additionally arranged between the pilot type electromagnetic valve and the auxiliary hoisting main valve, the opening degree of a valve port of the auxiliary hoisting main valve is adjusted by the pilot type electromagnetic valve, the flow entering the motor is adjusted, and therefore the speed of the amplitude variable trolley is adjusted. By adding the shuttle valve, the two-position two-way electromagnetic directional valve and the small handle and controlling the amplitude-variable trolley to run by the small handle, the stepless speed regulation of the handle in the whole range is realized, so that the operation comfort of a driver is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a convenient lightweight hoisting device;
in the figure, 1-pilot valve, 2-main valve, 3-electromagnetic proportional pressure reducing valve I, 4-electromagnetic proportional pressure reducing valve II, 5-compensation valve, 6-motor, 7-radiator, 8-small handle, 9-original truck crane handle, 10-shuttle valve and 11-two-position two-way reversing valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The truck crane of the lightweight hoisting equipment has two working modes, one mode is the condition that the amplitude-variable trolley on the auxiliary boom is used for carrying out amplitude-variable operation, the other mode is the condition that the original truck crane (namely the auxiliary boom and the amplitude-variable trolley are not used) is used for carrying out hoisting, and the head part of the main boom of the truck crane is provided with a lifting hook (not shown in figure 1). Both cannot be used simultaneously.
As shown in fig. 1, the hydraulic control system for the luffing mechanism of the convenient lightweight hoisting equipment comprises a pilot valve 1, a main valve 2, an electromagnetic proportional pressure reducing valve I3 and an electromagnetic proportional pressure reducing valve II4, wherein the pilot valve 1 is a two-position five-way reversing valve, the main valve 2 is a three-position seven-way hydraulic control valve, the electromagnetic proportional pilot valve I3 and the electromagnetic proportional valve II4 are two-position three-way valves, a port a of the pilot valve 1 is connected with a port P1 of the electromagnetic proportional pressure reducing valve I3, a port P1 is connected with a port a1, a port a1 is connected with a left control port on the main valve 2, a port B of the pilot valve 1 is connected with a port P2 of the electromagnetic proportional pressure reducing valve II4, a port P2 is connected with a port a2, and a port a2 is connected with a right control port of the main valve 2. The system also comprises a small handle 8 and an original truck-mounted crane handle 9, and only one small handle 8 and one original truck-mounted crane handle 9 are needed to be explained, and the left part and the right part which are shown below the pilot valve 1 in the figure 1 are the same, so that the purpose of separately explaining two actions of ascending and descending of the small handle 8 in the operation of the amplitude-variable trolley and two actions of ascending and descending of the original truck-mounted crane handle 9 in the operation main arm is achieved. The small handle 8 is connected with the original truck crane handle 9 through an oil circuit by a shuttle valve 10, and an E port of the shuttle valve 10 is connected with an R1 port of the pilot valve 1. The original truck crane handle 9 is connected with the shuttle valve 10 through a two-position two-way electromagnetic directional valve 11.
The system receives different current signals through an electric proportional pressure reducing valve I3 and an electromagnetic proportional pressure reducing valve II4 to control the oil quantity of a pilot type electromagnetic valve, adjusts the opening degree of a valve port of an auxiliary winch main valve and further adjusts the running speed of the amplitude-variable trolley. When the amplitude variation trolley moves upwards along the auxiliary jib, as shown in fig. 1, the oil inlet path of the hydraulic control system is as follows: the left small handle 8-the left shuttle valve 10-the pilot valve 1-the P1 of the electro proportional pressure reducing valve I3, the A1 port-the left position of the main valve 2-the compensation valve 5-the upper cavity of the motor 6 in the figure 1; the oil return path is as follows: the lower cavity of the motor 6-the left position of the main valve 2-the radiator 7.
When the amplitude variation trolley runs downwards along the auxiliary jib, as shown in fig. 1, the oil inlet path is as follows: the lower chamber of the motor 6 of the compensation valve 5 of the right main valve 2 of the P2 and a2 of the electro-proportional pressure reducing valve II4 of the left shuttle valve 10 of the pilot valve 1 of the right hand side of fig. 1; the oil return path is as follows: the upper chamber of the motor 6-the right position of the main valve 2-the radiator 7. In the system, a small handle 8 is used for controlling the ascending and descending of the amplitude variation trolley on the auxiliary arm, and an original truck crane handle 9 is used for operating an original truck crane.
When need use former truck crane to carry out construction operation, when mobile crane's dolly rises, the oil feed route is: the original truck crane handle 9 on the left of FIG. 1, the left position of the two-position two-way electromagnetic directional valve 11, the left shuttle valve 10, the left position of the pilot valve 1, the P1 and A1 of the left electro-proportional pressure reducing valve I3, the left position of the main valve 2, the compensation valve 5 and the upper cavity of the motor 6; an oil return path thereof: the lower cavity of the motor 6-the left position of the main valve 2-the radiator 7. When the automobile crane descends, the oil inlet path is as follows: the original truck crane handle 9 on the right in fig. 1, the left position of the two-position two-way electromagnetic reversing valve 11 on the right, the shuttle valve 10 on the right, the P2 of the electro-proportional pressure reducing valve II4 of the pilot valve 1, the port A2, the right position of the main valve 2, the compensation valve 5 and the lower cavity of the motor 6; the oil return path is as follows: the upper chamber of the motor 6-the right position of the main valve 2-the radiator 7.
According to the principle that two paths of oil pass through the shuttle valve and high-pressure oil is output, when the convenient lightweight hoisting equipment is used, the original automobile crane handle is not moved, the small handle is operated to control the running speed of the variable-amplitude trolley, and a two-position two-way electromagnetic reversing valve is additionally arranged between the original automobile handle and the shuttle valve to avoid misoperation of a driver. When the truck crane is used, the small handle is not moved, the two-position two-way electromagnetic reversing valve is reversed, as shown in figure 2, the handle of the original truck crane is operated to control the auxiliary winch to rise and fall, at the moment, the proportional adjustment of the electric proportional pressure reducing valve does not work, and the oil way is opened.
In summary, the system reduces the speed of the auxiliary winch by adding two electromagnetic proportional valves, so that the ascending and descending speeds of the amplitude-variable trolley reach the normal working state, and the error operation of an operator on the original truck crane can be prevented by arranging the two-position two-way reversing valve 11 when the operator operates the small handle.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes which can be made within the knowledge of those skilled in the art without departing from the gist of the present invention are within the scope of the claims of the present invention.
Claims (3)
1. The utility model provides a convenient lightweight lifting device luffing mechanism hydraulic control system which characterized in that: including pilot valve (1), main valve (2) and electromagnetism proportional pressure reducing valve I (3), electromagnetism proportional pressure reducing valve II (4), pilot valve (1) is two-position five-way switching-over valve, main valve (2) are three-position seven and lead to the pilot operated valve, electromagnetism proportional pilot valve I (3), electromagnetism proportional valve II (4) are two-position three-way valve, wherein, the A mouth of pilot valve (1) is connected the P1 mouth of electromagnetism proportional pressure reducing valve I (3), and A1 mouth is connected to P1 mouth, and A1 mouth is connected left side control mouth on main valve (2), the B mouth of pilot valve (1) is connected the P2 mouth of electromagnetism proportional pressure reducing valve II (4), and A2 mouth is connected to P2 mouth, and A2 mouth is connected the right side control mouth of main valve (2).
2. The hydraulic control system for the luffing mechanism of the convenient lightweight hoisting equipment according to claim 1, is characterized in that: the hydraulic control system is characterized by further comprising a small handle (8) and an original truck crane handle (9), wherein the small handle (8) is connected with the original truck crane handle (9) in an oil way through the shuttle valve (10), and an E port of the shuttle valve (10) is connected with an R1 port of the pilot valve (1).
3. The hydraulic control system for the luffing mechanism of the convenient lightweight hoisting equipment according to claim 2, is characterized in that: the original truck crane handle (9) is connected with the shuttle valve (10) through a two-position two-way reversing valve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121481120.XU CN215974702U (en) | 2021-06-30 | 2021-06-30 | Convenient lightweight hoisting equipment luffing mechanism hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121481120.XU CN215974702U (en) | 2021-06-30 | 2021-06-30 | Convenient lightweight hoisting equipment luffing mechanism hydraulic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215974702U true CN215974702U (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121481120.XU Active CN215974702U (en) | 2021-06-30 | 2021-06-30 | Convenient lightweight hoisting equipment luffing mechanism hydraulic control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215974702U (en) |
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2021
- 2021-06-30 CN CN202121481120.XU patent/CN215974702U/en active Active
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