CN217650758U

CN217650758U - Rope disorder and rope falling prevention system of crane

Info

Publication number: CN217650758U
Application number: CN202220833179.9U
Authority: CN
Inventors: 李维波; 张刊; 李立国; 陈剑洋; 杨滔
Original assignee: Zhejiang Construction Engineering Machinery Group Co Ltd
Current assignee: Zhejiang Construction Engineering Machinery Group Co Ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-10-25
Anticipated expiration: 2032-04-08

Abstract

The utility model discloses a rope disorder prevention rope-releasing system of crane, including setting up the hoist engine on the hoist engine, the hoist engine passes through wire rope and winds on the pulley, and the lifting hook is connected to wire rope one end, is equipped with the force sensor with PLC electric connection on the wire rope, the pulley is through being connected the mounting panel with PLC electric connection's electromagnetic attraction device, and electromagnetic attraction device and pulley normal running fit are equipped with the location strip on the mounting panel, and the corresponding position is equipped with the locating hole on the pulley. Whether the lifting hook touches the ground or not is judged by combining the PLC through the tension sensor, and meanwhile, the rotation of the pulley is limited through the positioning strip, so that the lifting hook is simple in structure and convenient to use.

Description

Rope disorder and rope falling prevention system of crane

Technical Field

The utility model relates to a hoist field, concretely relates to rope disorder prevention rope-off system of hoist.

Background

The steel wire rope is separated from the pulley to cause rope disorder, the rope disorder can cause great labor and material waste to rethread the steel wire rope, and unpredictable safety accidents can be caused; the existing method for judging the grounding of the lifting hook of the crane is to install a low limit switch at the position of a winch, and the method has the great disadvantage that the working condition of the crane is not always flat, and a hanging object is often hung to a hollow position from the flat, so that the low limit function cannot be realized, drivers often remove the low limit function, and safety accidents can be caused.

SUMMERY OF THE UTILITY MODEL

For solving above technical problem, the utility model provides a rope system is taken off in disorder rope prevention of hoist combines PLC to judge whether the lifting hook contacts to earth through force sensor, restricts the rotation of pulley simultaneously through the location strip, simple structure convenient to use.

The utility model adopts the following technical proposal:

the rope disorder prevention and rope falling system of the crane comprises a winch arranged on the crane, wherein the winch is wound on a pulley through a steel wire rope, one end of the steel wire rope is connected with a lifting hook, the steel wire rope is provided with a tension sensor electrically connected with a PLC, the pulley is connected with a mounting plate through an electromagnetic attraction device electrically connected with the PLC, the electromagnetic attraction device is in running fit with the pulley, a positioning strip is arranged on the mounting plate, and a positioning hole is formed in the corresponding position on the pulley.

Preferably, the electromagnetic attraction device comprises a shell, a static iron core fixedly arranged in the shell, and a movable iron core connected with the static iron core through a spring, wherein the static iron core is electrically connected with the coil.

Preferably, one end of the shell is provided with a connecting block fixedly connected with the mounting plate.

Preferably, one end of the movable iron core is provided with a rotating ring which is in rotating fit with the pulley.

Preferably, one end of the movable iron core is provided with a limiting groove, and a rotating ring which is in rotating fit with the pulley is arranged in the limiting groove.

Preferably, the other end of the movable iron core is provided with an anti-falling block which is positioned at the shell and slides.

Preferably, the mounting plate is provided with five uniformly arranged positioning strips, and the corresponding positions on the pulley are provided with the same number of positioning holes.

Preferably, the size of the positioning hole is larger than that of the positioning strip.

Compared with the prior art, the utility model has the advantages of it is following:

1. whether the lifting hook touches the ground or not is judged by comparing the indication value of the tension sensor with the critical value, the method is simple, and some safety accidents can be prevented.

2. The rotation of the pulley is limited by the positioning strip, the structure is simple, and the use is convenient.

3. The positioning strip is matched through the large-size positioning hole, so that the positioning strip can enter the positioning hole more easily on the premise of ensuring accurate grounding judgment.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the electromagnetic attraction device.

Fig. 3 is a schematic structural view of the pulley.

Fig. 4 is a schematic view of the three-dimensional structure of the present invention.

Fig. 5 is a schematic perspective view of another perspective view of the present invention.

Fig. 6 is a schematic diagram of the explosion structure of the present invention.

In the figure, a pulley 1, a positioning hole 11, a connecting plate 12, an electromagnetic suction device 2, a shell 21, a connecting block 211, a static iron core 22, a spring 23, a movable iron core 24, a rotating ring 241, an anti-drop block 242, a coil 25, a mounting plate 3 and a positioning strip 31.

Detailed Description

In order to facilitate understanding of the technical solutions of the present invention, the following detailed description is made with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1-6, a rope disorder prevention and rope release system of a crane comprises a winch arranged on the crane, wherein the winch is wound on a pulley 1 through a steel wire rope, one end of the steel wire rope is connected with a lifting hook, the steel wire rope is provided with a tension sensor electrically connected with a PLC and used for detecting the tension of the current steel wire rope, the pulley 1 is connected with a mounting plate 3 through an electromagnetic attraction device 2 electrically connected with the PLC, the electromagnetic attraction device 2 is in running fit with the pulley 1, the mounting plate 3 is provided with a positioning strip 31, and a positioning hole 11 is arranged at a corresponding position on the pulley 1.

The electromagnetic attraction device 2 comprises a shell 21, a static iron core 22 fixedly arranged in the shell 21, and a movable iron core 24 connected with the static iron core 22 through a spring 23, wherein the static iron core 22 is electrically connected with a coil 25.

And one end of the shell 21 is provided with a connecting block 211 fixedly connected with the mounting plate 3.

One end of the movable iron core 24 is provided with a rotating ring 241 which is in running fit with the pulley 1, so that the pulley 1 can rotate conveniently, a connecting plate 12 is arranged at the corresponding position on the pulley 1, the connecting plate 12 is connected with the rotating ring 241 through a bolt, one end of the movable iron core 24 is provided with a limiting groove, and the rotating ring 241 which is in running fit with the pulley 1 is arranged in the limiting groove. The other end of the plunger 24 is provided with a slip-off preventing block 242 located at the casing 21 for preventing the plunger 24 from completely disengaging from the casing 21.

The mounting plate 3 is provided with five uniformly arranged positioning strips 31, and the corresponding positions on the pulley 1 are provided with the same number of positioning holes 11.

The size of the positioning hole 11 is larger than that of the positioning strip 31, so that the positioning strip 31 can be conveniently inserted into the positioning hole 11.

In use, calibration is first performed: the lifting hook is completely contacted with the ground, and the PLC memorizes the value of the tension sensor as a rope disorder critical value at the moment; when the value of the tension sensor is smaller than a critical value (which indicates that the lifting hook is completely contacted with the ground), the PLC sends an instruction to the electromagnetic attraction device 2 to electrify the coil 25, the movable iron core 24 of the electromagnetic attraction device 2 is attracted with the static iron core 22, namely, five positioning strips 31 of the mounting plate 3 are inserted into the positioning holes 11 of the pulley 1 (even if the positioning strips 31 are inserted into the positioning holes 11 and the pulley 1 is in a rotating state, the positioning strips 31 can be abutted against the side surfaces of the pulley 1 until the positioning strips 31 are inserted into the positioning holes 11), so that the steel wire rope in the pulley 1 cannot be separated from the pulley 1, the five positioning strips 31 which are evenly distributed have the design principle that the steel wire rope can be blocked by the movable pulley or the fixed pulley in any direction, the rope is prevented from being separated from the pulley to cause rope disorder, and the PLC controls the winch to stop moving; when the value of the tension sensor is greater than the critical value (indicating that the lifting hook is not touched or lifted), the PLC sends a command to the electromagnetic attraction device 2, so that the coil 25 is de-energized, the movable iron core 24 and the stationary iron core 22 of the electromagnetic attraction device 2 are loosened, that is, the five positioning strips 31 of the mounting plate 3 exit from the pulley 1, and the friction resistance caused by the interference between the positioning strips 31 and the steel wire rope in the working process of the crane is prevented.

The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is defined by the scope defined by the claims, and a plurality of modifications and embellishments made by those skilled in the art without departing from the spirit and scope of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a rope disorder prevention rope release system of hoist, its characterized in that, is including setting up the hoist engine on the hoist, the hoist engine passes through wire rope and winds on pulley (1), and the lifting hook is connected to wire rope one end, be equipped with on the wire rope with PLC electric connection's force sensor, pulley (1) is through being connected mounting panel (3) with PLC electric connection's electromagnetic attraction device (2), and electromagnetic attraction device (2) and pulley (1) normal running fit are equipped with location strip (31) on mounting panel (3), and corresponding position is equipped with locating hole (11) on pulley (1).

2. The rope disorder and rope release preventing system of the crane as claimed in claim 1, wherein the electromagnetic attraction device (2) comprises a housing (21), a static iron core (22) fixedly arranged in the housing (21), and a movable iron core (24) connected with the static iron core (22) through a spring (23), and the static iron core (22) is electrically connected with a coil (25).

3. The rope disorder preventing system of the crane according to claim 2, wherein one end of the shell (21) is provided with a connecting block (211) fixedly connected with the mounting plate (3).

4. The rope disorder preventing rope release system of the crane according to claim 2, wherein one end of the movable iron core (24) is provided with a rotating ring (241) which is rotatably matched with the pulley (1).

5. The rope disorder prevention rope release system of the crane according to claim 2, wherein one end of the movable iron core (24) is provided with a limiting groove, and a rotating ring (241) which is in rotating fit with the pulley (1) is arranged in the limiting groove.

6. The rope disorder preventing system of the crane as claimed in claim 2, wherein the other end of the movable iron core (24) is provided with a preventing block (242) which is positioned on the shell (21) to slide.

7. The rope disorder preventing and rope releasing system of the crane as claimed in claim 1, wherein the mounting plate (3) is provided with five uniformly arranged positioning strips (31), and the pulley (1) is provided with the same number of positioning holes (11) at corresponding positions.

8. The rope disorder preventing system of the crane according to claim 1, wherein the size of the positioning hole (11) is larger than that of the positioning strip (31).