CN212863882U

CN212863882U - Heavy limit system that sticks together of winding is prevented to large-scale metallurgical ladle crane play to rise limit

Info

Publication number: CN212863882U
Application number: CN202021613036.4U
Authority: CN
Inventors: 王荣强; 郝枫; 孙福全; 刘洋
Original assignee: Bengang Steel Plates Co Ltd
Current assignee: Bengang Steel Plates Co Ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2021-04-02
Anticipated expiration: 2030-08-06

Abstract

The utility model discloses a heavy spacing system that sticks together of limit anti-coiling area is played to large-scale metallurgical ladle crane, include: the device comprises a lifting limit switch, a weight, a main rope, a balance rope fixing piece and a traction rod; the weight comprises a weight body and two balancing rods fixed on the weight body, and a hollow inner ring is arranged on the weight body; a lifting limit switch and a balance rope fixing piece are arranged on a crane trolley structure, the lifting limit switch is connected with the gravity center position of a weight through a main rope, the tail ends of two balance rods are respectively connected with one end of a balance rope through a connecting rope, the other end of the balance rope is fixed on the balance rope fixing piece, and a steel wire rope of the crane penetrates through a hollow inner ring of the weight body; the two ends of the traction rod are respectively connected with the main rope and the balance rope so as to ensure that the balance rope below the traction rod is parallel to the main rope. The weight in the system can be kept static and stable, and the malignant accident that the weight is damaged by a winding belt to a steel wire rope of the hoisting mechanism can be avoided while ensuring the reliability of the second-stage hoisting limit.

Description

Heavy limit system that sticks together of winding is prevented to large-scale metallurgical ladle crane play to rise limit

Technical Field

The utility model belongs to the technical field of the hoist is spacing, a heavy spacing system that sticks together of winding is prevented to large-scale metallurgical ladle crane play to rise limit is related to.

Background

At present, the hoisting operation of liquid molten metal in the majority of metallurgical enterprises is carried out by large-scale metallurgical casting cranes according to the part 1 of the safety code of GB6067.1-2010 crane: the general rules require that "a crane handling molten metal should be equipped with a second level of lift height limiter to prevent over-topping and should disconnect a higher level of power supply". The specifications require that the first-stage lifting height limiter and the second-stage lifting height limiter adopt different triggering forms, the rotation limiter is generally adopted as the first-stage limiter at present domestically, and the weight limiter triggers the limit switch for the hook body of the lifting hook touching the weight, so that the inspection and maintenance are more visual, convenient and reliable, and the rotation limiter is generally used as the second stage.

The weight stopper consists of a limit switch and a weight hung on a thin steel rope below the limit switch, and after a lifting hook of a steel wire rope of the crane touches the weight below the limit switch, a contact in the limit switch acts to disconnect a corresponding circuit. The weight is generally of a casting structure with a hollow middle, and the steel wire rope passes through the hollow part, so that when the steel wire rope moves up and down, the weight is in a relatively static state, and the limit switch can not be touched until the lifting hook touches the weight. However, in a severe cold environment in winter in the north, due to the fact that the viscosity of lubricating grease of the steel wire rope is increased due to extremely low temperature, the steel wire rope which is hung below and heavy lump and is moved frequently adheres to an upper belt (generally, the temperature is lower than-20 ℃, which is easy to happen), the lifting limit switch malfunctions, and even is involved in a fixed pulley piece in a serious situation, so that a severe accident that the steel wire rope is damaged and broken by the heavy lump occurs.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a heavy limit system that sticks together of limit anti-coiling belt that plays to large-scale metallurgical ladle crane, heavy stone roller can keep static and stable in this system, plays to rise spacing reliable when guaranteeing the second level, can stop heavy stone roller by the malignant accident emergence of winding belt damage hoisting mechanism wire rope.

The utility model provides a heavy spacing system that sticks together of limit anti-coiling area is played to large-scale metallurgical ladle crane, include: the device comprises a lifting limit switch, a weight, a main rope, a balance rope fixing piece and a traction rod; the weight comprises a weight body and two balancing rods fixed on the weight body, and a hollow inner ring is arranged on the weight body;

the lifting limit switch and the balance rope fixing piece are installed on a crane trolley structure, the lifting limit switch is connected with the gravity center position of the weight through the main rope, the tail ends of the two balance rods are respectively connected with one end of the balance rope through the connecting rope, the other end of the balance rope is fixed on the balance rope fixing piece, and a steel wire rope of the crane penetrates through the hollow inner ring of the weight body; two ends of the traction rod are respectively connected with the main rope and the balance rope so as to ensure that the balance rope below the traction rod is parallel to the main rope.

The utility model discloses an among the heavy spacing system that sticks together of winding is prevented to large-scale metallurgical ladle crane play to rise limit, the stone roller body comprises curved stone roller ring sum main stone roller, the oval stone roller body that the stone roller ring sum main stone roller pegged graft each other and constitutes to have the cavity inner ring, the both ends of stone roller ring are equipped with the engaging lug respectively, and the both ends of main stone roller are equipped with the connector respectively, all are equipped with the through-hole on engaging lug and the connector, the connector correspondence is inserted and is passed through bolt fixed connection in the engaging lug.

In the utility model discloses a heavy limit system that sticks together of winding is prevented to large-scale metallurgical ladle crane lifting limit, two balancing poles are connected with the connection piece respectively, and the connection piece passes through the fix with screw on the main stone roller, and the front end of two balancing poles connects and forms the go-between, the go-between is the focus position of the heavy stone roller, and the lifting limit switch passes through the main rope and is connected with the go-between; the tail ends of the two balancing rods are provided with fixing holes for fixedly connecting ropes.

The utility model provides a heavy limit system that sticks together of winding is prevented to large-scale metallurgical ladle crane play to limit, makes heavy stone roller focus when hanging more stable through eccentric oval structure, adopts the form that three points were hung simultaneously, utilizes lever principle ingeniously, forms reaction force to wire rope's adhesion, has offset the power of moving steel cable to the upper band of heavy stone roller to avoided the initiation of heavy upper band phenomenon that sticks together, stopped the cracked incident of wire rope and appeared. In addition, the assembly of each part adopts the plug-in type combination, and the installation is simple and convenient, is convenient for maintain, reduces the maintenance cost.

Drawings

Fig. 1 is a schematic structural diagram of a limit system for preventing coiling belt from heavy lump at the lifting limit of a large-scale metallurgical ladle crane;

fig. 2 is a schematic structural diagram of the weight of the present invention;

fig. 3 is a force diagram of the weight of the utility model.

Detailed Description

As shown in fig. 1, the utility model discloses a heavy spacing system that sticks together of limit anti-coiling is played to large-scale metallurgical ladle crane, include: the device comprises a lifting limit switch 1, a weight 2, a main rope 3, a balance rope 4, a balance rope fixing piece 5 and a traction rod 6. The weight 2 comprises a weight body and two balancing rods 21 fixed on the weight body, and a hollow inner ring 22 is arranged on the weight body.

The hoisting limit switch 1 and the balance rope fixing piece 5 are installed on a crane trolley structure, the hoisting limit switch 1 is connected with the gravity center position of the weight 2 through the main rope 3, the tail ends of the two balance rods 21 are respectively connected with one end 4 of the balance rope through the connecting rope 7, the other end of the balance rope 4 is fixed on the balance rope fixing piece 5, and the steel wire rope 8 of the crane penetrates through the hollow inner ring 22 of the weight body. The two ends of the traction rod 6 are respectively connected with the main rope 3 and the balance rope 4, so that the balance rope 4 below the traction rod 6 is parallel to the main rope 3.

As shown in fig. 2, the weight body is composed of an arc-shaped weight ring 23 and a main weight 24, and the weight ring 23 and the main weight 24 are inserted into each other to form an oval weight body with a hollow inner ring 22. The two ends of the weight ring 23 are respectively provided with a connecting lug 25, the two ends of the main weight 24 are respectively provided with a connector 26, the connecting lugs 25 and the connectors 26 are both provided with through holes, and the connectors 26 are correspondingly inserted into the connecting lugs 25 and fixedly connected through bolts.

The two balancing rods 21 are respectively connected with a connecting piece 27, the connecting piece 27 is fixed on the main weight 24 through screws, the front ends of the two balancing rods 21 are connected to form a connecting ring 28, the connecting ring 28 is the gravity center position of the weight 2, and the lifting limit switch 1 is connected with the connecting ring 28 through the main rope 3. The ends of the two balancing rods 21 are provided with fixing holes 29 for fixing the connecting ropes 7.

As shown in fig. 3, the stress principle of the design is as follows: an innovative three-point hanging form is adopted to ensure that the weight is in a balanced state, a certain angle is formed between a weight ring and a moving crane steel wire rope (the upward speed is v) so as to reduce the contact area between the weight ring and the steel wire rope (the ideal design achieves point contact), meanwhile, the gravity center (point O in the figure) of a main rope suspension point is used as a fulcrum, and when the steel wire rope generates an upward force F on the weight ring, the force F forms a downward reverse force F at the point B through the lever action; point B will remain stationary against the influence of force f due to the restriction of the balancing cord; the balance rope fixed above always keeps an upward force F ', and similarly, the force F ' forms a downward reverse force F ' at the point A through the lever action, so that the upward traction force of the moving steel wire rope on the weight ring can be reduced, the upward force at the front part of the weight ring is eliminated, and the phenomenon that the weight is carried by the steel wire rope is avoided.

The utility model discloses a heavy spacing system that sticks together of winding is prevented to large-scale metallurgical ladle crane play to rise limit, and the novel heavy stone roller overall structure of adoption is hollow eccentric oval structure. The main weight is the center of gravity of the whole heavy weight, a steel wire rope of a lifting mechanism of the crane penetrates through the hollow inner ring 22, the balance rod arranged on the main weight is used for hanging a main rope and a balance rope of a heavy weight limiting system, a three-point hanging mode is adopted, the heavy weight is in a balance state, the contact area between the weight ring and the steel wire rope is enabled to be minimum while a certain angle is formed, accordingly, the adhesion force is reduced, when the steel wire rope generates the loading force on the heavy weight, the counter-acting force generated by the balance rod is used for avoiding the heavy weight from being loaded on the steel wire rope, the phenomenon that the heavy weight is loaded on the steel wire rope is finally avoided, and the operation safety of the large-scale metallurgical casting crane is improved.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the spirit of the present invention, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a heavy spacing system that sticks together of winding is prevented to large-scale metallurgical ladle crane play to rise limit, its characterized in that includes: the device comprises a lifting limit switch, a weight, a main rope, a balance rope fixing piece and a traction rod; the weight comprises a weight body and two balancing rods fixed on the weight body, and a hollow inner ring is arranged on the weight body;

2. The limit system for limiting the heavy lump of the large metallurgical ladle crane in the process of preventing the coiling from being rolled up at the lifting limit as claimed in claim 1, wherein the lump body is composed of an arc-shaped lump ring and a main lump, the lump ring and the main lump are mutually inserted to form an oval lump body with a hollow inner ring, two ends of the lump ring are respectively provided with a connecting lug, two ends of the main lump are respectively provided with a connector, the connecting lugs and the connectors are respectively provided with through holes, and the connectors are correspondingly inserted into the connecting lugs and fixedly connected through bolts.

3. The large-scale metallurgical ladle crane lifting limit coiling-prevention heavy lump limiting system as recited in claim 2, characterized in that two balancing rods are respectively connected with a connecting sheet, the connecting sheet is fixed on a main lump through screws, the front ends of the two balancing rods are connected to form a connecting ring, the connecting ring is the gravity center position of the heavy lump, and a lifting limit switch is connected with the connecting ring through a main rope; the tail ends of the two balancing rods are provided with fixing holes for fixedly connecting ropes.