Grounding device for a gantry crane

Abstract

The utility model provides a portal crane grounding device, including track, be equipped with the door machine wheel frame of track length direction removal can along, be equipped with the connecting channel steel on the door machine wheel frame, be equipped with the ground wire on the connecting channel steel, the bottom of connecting channel steel is equipped with a plurality of electric brush, electric brush is connected with ground wire, and the bottom of electric brush is in abutment on the upper surface of track. The utility model sets up the electric brush in abutment on the track at the bottom of connecting channel steel, and the current of ground wire is introduced into the track and is introduced into the earth through the electric brush, and the electric brush is not easy to rust and has good conductive effect, can ensure use effect, sets up the spiral spring of vortex on the brush grip and exerts the elastic force of downward to electric brush, ensures the contact area of electric brush and track, and further improves the grounding effect, simple structure, and the manufacturing cost is low.

Description

Technical Field

[0001] This utility model belongs to the technical field of gantry crane equipment and relates to a grounding device for gantry cranes. Background Technology

[0002] Currently, gantry cranes rely on the contact between the wheels and the rails to achieve protective grounding. However, after a period of operation, a large amount of rust easily accumulates on the surface of the gantry crane and the railcar, resulting in poor contact and a large and unstable grounding resistance value. When encountering situations such as lightning strikes, static electricity, or equipment failure and leakage, the current cannot be properly conducted to the ground, which can easily threaten the safety of personnel and equipment. Utility Model Content

[0003] The purpose of this utility model is to address the problem of poor contact in existing gantry cranes that ground through the wheels, and to provide a grounding device for gantry cranes.

[0004] Therefore, the present invention adopts the following technical solution:

[0005] A grounding device for a gantry crane includes a rail, on which a gantry crane wheel frame movable along the length of the rail is provided. A connecting channel steel is provided on the gantry crane wheel frame, and a grounding wire is provided on the connecting channel steel. A plurality of brushes are provided at the bottom end of the connecting channel steel, and the brushes are connected to the grounding wire. The bottom end of the brushes abuts against the upper surface of the rail.

[0006] Furthermore, the connecting channel steel is arranged perpendicular to the track.

[0007] Furthermore, the bottom side of the connecting channel steel is provided with a plurality of brush holders in a tubular structure corresponding one to one with the brush. The brush is located inside the brush holder and can move along the length of the brush holder. The two ends of the brush extend from the two ends of the brush holder. The side wall of the brush holder is provided with a bayonet. The bayonet is provided with a mounting bracket. The mounting bracket is provided with a V-shaped spring. The spring is provided with a spiral spring. The spiral spring abuts against the top of the brush.

[0008] Furthermore, the top of the brush is formed with an inclined surface, and the spiral spring abuts against the inclined surface.

[0009] Furthermore, the brush holder and the track are arranged perpendicular to each other.

[0010] Furthermore, there are two brushes.

[0011] The beneficial effects of this utility model are as follows: an electric brush is set at the bottom of the connecting channel steel to abut against the rail. The electric brush introduces the current of the grounding wire into the rail and into the ground. The electric brush is not easy to rust and has good conductivity, which can ensure the use effect. A spiral spring is set on the brush holder to apply downward elastic force to the electric brush, ensuring the contact area between the electric brush and the rail, and further improving the grounding effect. The structure is simple and the manufacturing cost is low. Attached Figure Description

[0012] Figure 1 This is a schematic front view of the structure of this utility model;

[0013] Figure 2 This is a schematic side view of the structure of this utility model;

[0014] Figure 3 for Figure 1 Enlarged view of part A in the middle;

[0015] Figure 4 for Figure 2 Enlarged view of part B in the middle;

[0016] In the diagram, 1-track, 2-gantry crane wheel frame, 3-connecting channel steel, 4-grounding wire, 5-brush, 6-brush holder, 7-bayonet, 8-mounting bracket, 9-spring, 10-volume spring, 11-sloping surface. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings:

[0018] like Figure 1-4As shown, a grounding device for a gantry crane includes a rail 1, which is a conventional gantry crane rail. A gantry crane wheel frame 2, movable along the length of the rail 1, is mounted on the rail 1. The wheel frame 2 is a conventional component of the gantry crane, and wheels are installed on it, allowing movement on the rail 1. A vertically arranged connecting channel steel 3 is provided on the wheel frame 2, and a grounding wire 4 is mounted on the connecting channel steel. The grounding wire 4 is a conventional grounding wire, with one end connected to a position adjacent to the gantry crane, specifically to a grounding copper busbar inside the gantry crane's main beam. Multiple brushes 5 are provided at the bottom of the connecting channel steel 3; in this embodiment, two brushes 5 are provided. The brushes 5 are connected to the grounding wire 4, and their bottom ends abut against the upper surface of the rail 1. The brushes 5 connect the grounding wire 4 to the rail 1. Therefore, the grounding wire 4 can conduct current into the ground. The brush 5 has better conductivity than the wheel and is not easy to rust, ensuring the performance. In addition, the brush 5 is inexpensive and easy to replace. Specifically, the bottom end of the connecting channel steel 3 is provided with multiple brush holders 6 corresponding to the brush 5. The brush holder 6 is a rectangular tubular structure adapted to the brush 5. The brush holder 6 is vertically set, and the brush 5 is located in the brush holder 6 and can move along the length of the brush holder 6. The brush 5 is installed at the bottom end of the connecting channel steel 3 through the brush holder 6. The two ends of the brush 5 extend from the two ends of the brush holder 6. The side wall of the brush holder 6 is provided with a bayonet 7, and the bayonet 7 is provided with a mounting bracket 8. The mounting bracket 8 is provided with a V-shaped spring piece 9. The spring piece 9 is made of metal material such as stainless steel, which is inexpensive. The spring piece 9 can be installed on the mounting bracket 8 by welding or other existing methods. A portion of the spring piece 9 passes through the bayonet 7. A spiral spring 10 is provided on the spring piece 9. The spiral spring 10 can be welded onto the spring piece 9. The spring piece 9 can apply a certain elastic force to the spiral spring 10. The spiral spring 10 abuts against the top of the brush 5. Specifically, the top of the brush 5 forms an inclined surface 11. The spiral spring 10 abuts against the inclined surface 11. The spiral spring 10 can apply a downward elastic force to the brush 5, thereby making the brush 5 tightly abut against the upper surface of the track 1, ensuring the contact area between the brush 5 and the track 1, and thus improving the grounding effect. Similarly, when the elasticity of the spiral spring 10 and the spring piece 9 decreases after a period of use, the spiral spring 10 and the spring piece 9 can be directly replaced, which is convenient and quick.

[0019] The method of using this utility model is as follows:

[0020] During operation, the grounding wire 4 of the gantry crane is connected to the rail 1 through the brush 5 to achieve grounding. As the spiral spring 10 applies a downward elastic force to the brush 5, when the gantry crane moves along the length of the rail 1, the elastic force ensures that the brush 5 always abuts against the upper surface of the rail 1 and has sufficient contact area, thus ensuring that the grounding wire 4 can conduct current to the ground. The brush is not easy to rust, has good conductivity, and is inexpensive.

Claims

1. A grounding device for a gantry crane, comprising a rail (1), wherein a gantry crane wheel frame (2) movable along the length of the rail (1) is provided on the rail (1), characterized in that, The gantry crane wheel frame (2) is provided with a connecting channel steel (3), the connecting channel steel (3) is provided with a grounding wire (4), the bottom end of the connecting channel steel (3) is provided with multiple brushes (5), the brushes (5) are connected to the grounding wire (4), and the bottom end of the brushes (5) abuts against the upper surface of the track (1).

2. The grounding device for a gantry crane according to claim 1, characterized in that, The connecting channel steel (3) is set perpendicular to the track (1).

3. A grounding device for a gantry crane according to claim 1, characterized in that, The bottom end of the connecting channel steel (3) is provided with a plurality of brush holders (6) that correspond one-to-one with the brush (5) and are in a tubular structure. The brush (5) is located inside the brush holder (6) and can move along the length of the brush holder (6). The two ends of the brush (5) extend from the two ends of the brush holder (6). The side wall of the brush holder (6) is provided with a bayonet (7). The bayonet (7) is provided with a mounting bracket (8). The mounting bracket (8) is provided with a spring piece (9) in a V-shape. The spring piece (9) is provided with a spiral spring (10). The spiral spring (10) abuts against the top of the brush (5).

4. A grounding device for a gantry crane according to claim 3, characterized in that, The top of the brush (5) forms a slope (11), and the spiral spring (10) abuts against the slope (11).

5. A grounding device for a gantry crane according to claim 3, characterized in that, The brush holder (6) is set perpendicular to the track (1).

6. A grounding device for a gantry crane according to claim 1, characterized in that, There are two brushes (5).

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