CN202766182U - Electric hydraulic control rope blocking device - Google Patents

Abstract

The utility model discloses an electro-hydraulic controlled rope-stopping device, comprising: a rope-stopping mechanism, a rope-stopping hydraulic mechanism, a single-turn absolute encoder, a multi-turn absolute encoder, and a controller; the rope-stopping mechanism further includes: a swing rod, Rope-stop roller, guide rail rod, guide rod and rope-stop roller bracket; one end of the rope-stop roller cylinder is connected to the super-lift winch shaft, the other end is connected to the middle part of the swing rod, and the single-turn absolute encoder is arranged at one end of the swing rod , the swing lever swings around the installation shaft of the single-turn absolute encoder under the drive of the rope-stop roller cylinder; the rope-stop hydraulic mechanism includes: the rope-stop roller cylinder proportional solenoid valve, the rope-stop roller cylinder; the multi-turn absolute encoder is installed on the hoist On the reel, the controller is installed in the crane operator's cabin. The utility model can effectively prevent rope disorder and reduce the friction between the steel wire ropes on the winch; the electro-hydraulic control system is adopted to realize the intelligent control of the system, improve the control precision of the system, and make the operation of the winch mechanism more stable .

Description

Electro-hydraulic controlled rope stop device

technical field

The utility model relates to the technical field of construction machinery, in particular to an electro-hydraulic controlled rope retaining device.

Background technique

The winch is a mechanism for retracting and unwinding the steel wire rope. It is widely used in the cranes of construction machinery. For different winch installation positions, the direction of the wire rope will change. In the process of hoisting and unwinding, if the steel wire ropes are not arranged neatly, it will cause the steel wire ropes to squeeze each other, and it is easy to cause disordered ropes, which will cause instability to the lifting equipment and cause safety hazards. When the ropes of the hoisting mechanism are disordered, the crane must be stopped and the arrangement of the steel wire ropes must be arranged. This will cause a waste of time and a large amount of manpower for the actual operation of the crane, especially for some hoisting mechanisms that are not easy to maintain. On-site operation brings great inconvenience.

At present, the rope retaining device on the crane winch usually adopts the following two methods:

(1) Rope-stopping device. This kind of rope-stopping device is to add a rope-stopping tube in the direction of the steel wire rope. The axis line of the rope-stopping tube is parallel to the axis line of the winch. , the rope exit angle of the wire rope becomes smaller. Since the rope retaining tube device only changes the angle of the steel wire rope in the radial direction of the winch, the beating of the steel wire rope can be reduced when the winch moves rapidly. When there is a large angle between the direction of the rope and the radial plane of the winch, it is easy to cause disordered ropes, and when the winch rotates, there will be greater friction between the steel wire ropes.

(2) Hoisting wire rope pressure rope device, this kind of device is mainly designed a rope pressure mechanism, through the self-weight of the mechanism, the pressure rope mechanism is pressed on the rope exit point of the steel wire rope to change the axial rope exit angle of the steel wire rope. However, due to the rotation of the winch, the winding diameter of the drum changes, and the direction control of the wire rope is difficult and the precision is poor.

Therefore, for the need to precisely control the direction of wire rope exit and effectively prevent the phenomenon of wire rope disorder, it is necessary to design a novel rope retaining device with precise control, high reliability, convenience and practicality.

Contents of the invention

Purpose of the invention: In order to prevent the rope disorder of the steel wire rope and prolong its service life, an electro-hydraulic control rope retaining device is provided, which realizes the precise control of the direction of the steel wire rope.

The technical solution adopted: an electro-hydraulic control rope-stopping device is provided, including: a rope-stopping mechanism, a rope-stopping hydraulic mechanism, a single-turn absolute encoder 11, a multi-turn absolute encoder 14, and a controller 20; the rope-stopping mechanism further Including: swing rod 10, rope retaining roller 13, guide rail rod 21, guide rod 22 and rope retaining roller bracket 12; the two cross bars of rope retaining roller support 12 are fixed on the slider in parallel, and there is a stopper between the two cross bars. Rope roller 13, one end of rope retaining roller support 12 is connected with guide rail rod 21 through slider I27, and the other end is connected with guide rod 22 through slider II28; one end of rope retaining roller cylinder 9 is connected with 6 shafts of super-lift winch, and the other end Connected to the middle part of the swing rod 10, the single-turn absolute encoder 11 is arranged at one end of the swing rod 10 to detect the swing angle of the swing rod 10, and through the swing rod 10, the rope stop roller bracket 12 and the rope stop roller 13 The actual position of the rope retaining roller 13 is deduced from the size of the installation structure on the bracket, and the swing lever 10 swings around the installation shaft 15 of the single-turn absolute encoder under the drive of the rope retaining roller oil cylinder 9; the other end of the swing lever 10 is provided with a ring groove, and is connected with the rope retaining roller bracket 12 through the fixed shaft, the swing of the swing lever 10 drives the rope retaining roller support 12 and the rope retaining roller 13 to make a reciprocating linear motion, and the hoisting wire rope 7 passes through the two rope retaining rollers 13 , due to the reciprocating linear motion of the rope retaining roller 13, the direction of the hoisting wire rope 7 is controlled; the rope retaining hydraulic mechanism includes: the rope retaining roller cylinder proportional solenoid valve 18, the rope retaining roller cylinder 9, the rope retaining roller cylinder proportional solenoid The valve 18 is installed on the turntable 2 of the crane, and the telescopic movement of the rope-retaining roller cylinder 9 is controlled through the proportional solenoid valve 18 of the rope-retaining roller cylinder, and the push-roller cylinder 9 drives the swing of the swing rod 10; the multi-turn absolute encoder 14 is installed on the winch 6, the rope-out position of the wire rope 7 can be inferred from the initial calibration position of the wire rope 7, the hoisting angle, the number of hoisting rope grooves, and the winding layers of the wire rope 7; the controller 20 is installed in the crane operating room, and the single The detection signals of the circle absolute encoder 11 and the multi-turn absolute encoder 14 are input into the controller 20, and the input signal is processed by the internal circuit of the controller 20 and data analysis and calculation are made to make corresponding judgments to control the operation of the entire rope retaining device. action.

Wherein, the number of cross bars of the rope retaining roller support 12 is two, and the number of rope retaining rollers 13 is two.

Beneficial effects: the utility model controls the deflection angle of the steel wire rope in the axial direction of the winch through the reciprocating motion of the rope retaining roller, thereby effectively preventing rope disorder and reducing the friction between the steel wire ropes on the winch. At the same time, the rope retaining device adopts an electro-hydraulic control system. Through the automatic detection of the sensor and the closed-loop control of the controller to the rope retaining push roller cylinder, the intelligent control of the system is realized, the control accuracy of the system is improved, and the operation of the winch mechanism is more stable. .

Description of drawings

Figure 1 is a schematic diagram of the structure of the whole vehicle of the all-terrain crane.

Fig. 2 is a schematic diagram of the installation structure of the utility model on the super-lift winch.

Fig. 3 is an installation perspective view of the utility model on a super-lift winch.

Fig. 4 is a structural schematic diagram of the electro-hydraulic control rope retaining device of the present invention.

Fig. 5 is a schematic diagram of the way of pulling out the steel wire rope on the super-lift winch.

Fig. 6 is a control logic diagram of the electro-hydraulic control rope retaining device of the present invention.

Drawings: 1-Get off the car, 2-Turntable, 3-Main arm frame, 4-Super lift bracket, 5-Super lift pull plate, 6-Super lift winch, 7-Winch wire rope, 8-Hook , 9-rope roller cylinder, 10-swing lever, 11-single-turn absolute encoder, 12-rope roller bracket, 13-rope roller, 14-multi-turn absolute encoder, 15-installation shaft, 16-roll Yang hydraulic motor, 17-reducer, 18-rope roller cylinder proportional solenoid valve, 19-hydraulic motor proportional solenoid valve, 20-controller, 21-rail rod, 22-guide rod, 27-slider Ⅰ, 28- Slider II.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the utility model, further description will be made below in conjunction with the accompanying drawings and implementation examples.

Fig. 1 and Fig. 2 are schematic diagrams of the installation layout of the utility model on the super-lifting mechanism of an all-terrain crane adopting an electro-hydraulic control system, and the super-lifting winch 6 is installed at the end of the super-lifting bracket 4 . When the hoisting wire rope 7 is in disorder, the arrangement of the wire rope 7 on the hoisting will be unstable. When the crane is stressed, it may cause the super-lifting wire rope 7 to loosen, which will have a great impact on the crane and affect the site. Operation is very dangerous. When the all-terrain crane is working, the super-lifting bracket is erected, and there is a large height difference from the ground. When the hoisting wire rope 7 is in disorder, the super-lifting bracket needs to be retracted, and the main boom arm frame 3 is laid flat for processing. Work efficiency will be seriously affected. Therefore, the installation of the electro-hydraulic control rope retaining device can improve the safety of the crane and ensure the work efficiency on site.

The proportional solenoid valve 18 of the rope-retaining roller cylinder controls the movement of the rope-retaining roller cylinder 9. One end of the rope-retaining roller cylinder 9 is connected to the swing rod 10, and when the rope-retaining roller cylinder 9 moves, it will drive the swing rod 10 around a single circle. Installation of the absolute encoder Shaft 15 swings. the

Referring to FIG. 4 , when the swing lever 10 swings, it will drive the rope retaining roller bracket 12 and the rope retaining roller 13 to move along the guide rail rod 21 and the guide rod 22 . Because the swing rod 10 makes a circular motion around the installation shaft 15, the rope retaining roller bracket 12 moves linearly back and forth along the guide rail rod 21 and the guide rod 22, so one end of the swing rod 10 is designed as an annular groove structure, so that the swing rod 10 and the rope retaining roller The connection points of the brackets 12 can move relative to each other. The single-turn encoder 11 and the multi-turn encoder 14 respectively detect the swing angle of the swing rod 10 and the rotation angle of the super-lift winch 6, and input the detection signal into the controller 20, and through the data processing and judgment of the controller 20, control The rope-stop roller oil cylinder proportional solenoid valve 18 finally controls the motion of the rope-stop roller 13.

Referring to FIG. 5 , the steel wire rope 7 is led out from the rope exit point of the super-lift winch 6 and passed between two rope retaining rollers 13 to be connected to the main boom arm frame 3 . When the super-lifting winch 6 rotates, the rope exit point of the steel wire rope 7 changes, and the controller 20 controls the rope retaining roller 13 to reciprocate and linearly move on the hoisting axis through logical calculation, so that the rope-out direction of the steel wire rope 7 is in line with the super-coiler. The axial deflection angle of Yang 6 is always controlled within the allowable range. The wire rope 7 represented by the dotted line in the figure is the position of the wire rope 7 when the wire rope 7 is directly connected to the boom head of the main boom without installing an electro-hydraulic control rope retaining device. Due to the different working conditions of the all-terrain crane, the expansion angle of the super-lift bracket 4 is different, and the rope-out point is constantly changing during the hoisting rotation process, so the direction of the wire rope 7 will continue to change. When the wire rope 7 and the super-lift When the radial plane deflection angle of the winch 6 is too large, it is easy to cause disordered ropes.

Referring to Fig. 6, it is a control logic diagram of the present utility model. After the vehicle is powered on, the operator inputs a hydraulic motor action signal to the controller 20 by operating the handle or switch. After receiving the signal, the controller 20 converts the signal into a binary signal through the processing of the peripheral interface circuit, and transmits the signal to the microprocessor CPU for data processing and calculation. The CPU outputs an electrical signal through calculation, and controls the steering and speed of the hydraulic motor through the I/O expansion interface. The multi-turn absolute encoder 14 installed on the super hoist 6 can detect the angle change of the hoist in real time, and transmit the detected hoist angle signal to the microprocessor CPU after being converted by the peripheral interface circuit of the controller 20 . At this time, the CPU calculates the current position of the wire rope 7 through the calibration value of the initial position of the wire rope 7, the real-time rotation angle of the winch, the number of hoisting rope grooves, and the winding layers of the wire rope 7. Simultaneously, the single-turn encoder 11 of the swing rod 20 inputs the swing angle of the swing rod 10 into the CPU through the peripheral interface circuit of the controller 20, and the positions of the two rope retaining rollers 13 at this moment can be obtained through the data processing and calculation of the CPU. . Then, the CPU judges whether the deflection angle of the steel wire rope 7 exceeds the deflection angle range specified by the steel wire rope by comparison. If it exceeds the deflection angle range, the controller 20 will output a control signal to drive the proportional solenoid valve 18 of the rope retaining roller oil cylinder to make the retaining rope 7 move. The rope roller oil cylinder 9 drives the swing bar 10 to move, so that the two gear rope rollers 13 move along the guide rail bar 21 and the guide bar 22. The single-turn absolute encoder 11 of the swing rod 10 detects the angle of the swing rod 10 in real time and transmits it to the controller CPU. The controller 20 will calculate and judge the new angle data, thereby forming a closed-loop control to ensure control accuracy.

The above content is a further detailed description of the utility model in combination with the preferred technical solutions, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For a person of ordinary skill in the technical field to which the utility model belongs, on the premise of not departing from the concept of the utility model, simple deduction and replacement can also be made, which should be regarded as the protection scope of the utility model. the

Claims (2)

1. the ward off rope device of electrohydraulic control is characterized in that, the ward off rope device of described electrohydraulic control comprises: gear rope mechanism, gear rope hydraulic gear, individual pen absolute encoder (11), multi-turn absolute encoder (14), controller (20); Gear rope mechanism further comprises: swing arm (10), gear rope roller (13), guide rail pole (21), pilot bar (22) and gear rope roller support (12); Parallel being fixed on the slide block of two cross bars of gear rope roller support (12), be provided with gear rope roller (13) between two cross bars, steel rope (7) passes from gear rope roller (13), one end of gear rope roller support (12) is connected with guide rail pole (21) by slide block I (27), and the other end is connected with pilot bar (22) by slide block II (28); Gear rope roller oil cylinder (9) one ends are connected with super lift winch (6) axle, the other end is connected with the middle part axle of swing arm (10), individual pen absolute encoder (11) is arranged in an end of swing arm (10), and swing arm (10) installation shaft (15) around the individual pen absolute encoder under the driving of gear rope roller oil cylinder (9) swings; The other end of swing arm (10) is provided with circular groove, and is connected with gear rope roller support (12) by anchor shaft, and the swing of swing arm (10) drives gear rope roller support (12) and gear rope roller (13) does reciprocating linear motion; Gear rope hydraulic gear comprises: gear rope roller oil cylinder proportion magnetic valve (18), gear rope roller oil cylinder (9), and gear rope roller oil cylinder proportion magnetic valve (18) is installed on the turntable (2) of hoisting crane; Multi-turn absolute encoder (14) is installed on the reel of elevator (6), and controller (20) is installed in the crane cab.

2. the ward off rope device of electrohydraulic control according to claim 1 is characterized in that, the quantity of the cross bar of described gear rope roller support (12) is 2, and the quantity of gear rope roller (13) is 2.

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