A bridge crane anti-derailment alarm device

Abstract

This utility model relates to an anti-derailment alarm device for a bridge crane, comprising two detection mechanisms. Each detection mechanism includes a cylinder, a telescopic rod, and a displacement sensor. The cylinder is fixed to the trolley via a fixing frame and is positioned outside the bridge crane's track. One end of the telescopic rod is inserted into the cylinder, and the other end passes through the cylinder and contacts the track. A detection hole is provided at the end of the telescopic rod away from the track. A spring is fitted onto the telescopic rod inside the cylinder. One end of the spring is fixed to the telescopic rod, and the other end is fixed to the end of the cylinder away from the telescopic rod. The sensing element of the displacement sensor is inserted into the detection hole. This utility model uses the spring to keep the telescopic rod pressed tightly against the side of the track. The sensing element of the displacement sensor can sense the displacement distance of the telescopic rod, thereby detecting the offset position of the trolley wheels from the track. When the displacement change is too large, an alarm signal is issued, stopping the wheel movement.

Description

Technical Field

[0001] This utility model belongs to the technical field of bridge cranes, and specifically relates to a bridge crane anti-derailment alarm device. Background Technology

[0002] In industrial production, bridge cranes are widely used for material handling and other tasks. The wheels of a bridge crane trolley are mounted on two rails, and a motor drives the wheels to move along these rails, thus moving the bridge crane along the tracks. For bridge cranes operating under heavy loads, such as those used in steel production lines to transport raw materials, the wheels may derail and slip off the crane rails, rendering the crane unusable or even causing a safety accident. Utility Model Content

[0003] The purpose of this utility model is to provide a bridge crane anti-derailment alarm device that can detect the running status of the trolley wheels of the bridge crane.

[0004] To achieve the above objectives, the present invention provides a bridge crane derailment alarm device, comprising two detection mechanisms.

[0005] The two detection mechanisms are respectively installed at both ends of one side of the bridge crane trolley;

[0006] The detection mechanism includes a cylinder, a telescopic rod, and a displacement sensor.

[0007] The cylinder body is fixed to the trolley by a fixing frame, and the cylinder body is set outside the rail of the bridge crane; one end of the telescopic rod is inserted into the cylinder body, and the other end passes through the cylinder body and contacts the rail; a detection hole is opened at the end of the telescopic rod away from the rail; a spring is sleeved on the telescopic rod inside the cylinder body; one end of the spring is fixed to the telescopic rod, and the other end is fixed to the end inside the cylinder body away from the telescopic rod.

[0008] The displacement sensor is mounted on the cylinder block, and the sensing element of the displacement sensor is inserted into the detection hole.

[0009] Preferably, the telescopic rod has an opening at the end away from the cylinder; a roller is vertically rotatably connected inside the opening; and the roller is in contact with the track.

[0010] Preferably, both ends of the trolley on both sides of the bridge crane are equipped with detection mechanisms.

[0011] This utility model provides a bridge crane anti-derailment alarm device, which has the following advantages compared with the prior art:

[0012] The spring keeps the telescopic rod close to the side of the track. When the wheels are running normally, the spring can be in a slightly compressed state. When the trolley wheel derails outward, the cylinder moves outward from the track, and the spring pushes the telescopic rod to extend. When the trolley wheel derails inward, the cylinder moves inward from the track, causing the telescopic rod to move relative to the track, and the spring to compress. The sensing component of the displacement sensor can sense the displacement distance of the telescopic rod. The displacement sensor detects the offset position of the trolley wheel from the track. When the displacement change is too large, an alarm signal is issued, that is, the wheel derails, and the wheel stops moving. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the testing mechanism.

[0015] Figure 3 This is a schematic diagram of the internal structure of the cylinder block. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] As shown in the figure, a bridge crane derailment prevention alarm device includes two detection mechanisms.

[0018] The two detection mechanisms are respectively installed at both ends of one side of the bridge crane trolley 2;

[0019] The detection mechanism includes a cylinder 11, a telescopic rod 12, and a displacement sensor 13.

[0020] The cylinder body 11 is fixed to the trolley 2 by the fixing frame 3, and the cylinder body 11 is set outside the rail 21 of the bridge crane. Two cylinder bodies 11 are respectively set at the end of the trolley 2 wheel 22 away from the trolley 2. When one of the wheels 22 derails, the corresponding cylinder body 11 moves accordingly. One end of the telescopic rod 12 is inserted into the cylinder body 11, and the other end passes through the cylinder body 11 and contacts the rail 21. The telescopic rod 12 can slide inside the cylinder body 11. A detection hole is opened at the end of the telescopic rod 12 away from the rail 21.

[0021] A spring 14 is fitted onto the telescopic rod 12 inside the cylinder 11. One end of the spring 14 is fixed to the telescopic rod 12, and the other end is fixed to the end of the cylinder 11 away from the telescopic rod 12. The telescopic rod 12 inside the cylinder 11 is stepped. The spring 14 is fitted onto the telescopic rod 12 with a smaller diameter. One end of the spring 14 is fixed to the stepped surface of the telescopic rod 12. The spring 14 keeps the telescopic rod 12 close to the side of the track 21. The spring 14 can be in a slightly compressed state. When the wheels 22 of the trolley 2 derail outward, the cylinder 11 moves outward from the track 21, and the spring 14 pushes the telescopic rod 12 to extend. When the wheels 22 of the trolley 2 derail inward, the cylinder 11 moves towards the track 21, causing the telescopic rod 12 to move relative to the track, and the spring 14 to compress.

[0022] In addition, since wheel 22 derails generally derails to the outside of track 21, spring 14 can also be in a compressed state. When wheel 22 of trolley 2 derails to the outside, cylinder 11 moves out of track 21 and spring 14 pushes telescopic rod 12 to extend.

[0023] The displacement sensor 13 is mounted on the cylinder 11, and the sensing element 131 of the displacement sensor 13 is inserted into the detection hole. The displacement sensor 13 detects the displacement change of the telescopic rod 12 through the magnetic ring inside the telescopic rod 12. When the telescopic rod 12 moves, the sensing element 131 of the displacement sensor 13 can sense the displacement distance of the telescopic rod 12. The displacement sensors 13 of the two detection mechanisms can be electrically connected to the PLC controller. The data of the displacement sensors 13 is fed back to the PLC controller. The offset position of the wheels 22 at both ends of the trolley 2 relative to the track 21 is detected by the two displacement sensors 13. When the displacement change is too large, an alarm signal is issued to stop the movement of the wheels 22.

[0024] Furthermore, the telescopic rod 12 has an opening at the end away from the cylinder 11; a roller 121 is vertically rotatably connected inside the opening, and a connecting rod is vertically fixed inside the opening. The roller 121 is sleeved on the connecting rod and can rotate on the connecting rod; the roller 121 contacts the track 21. Through the roller 121, the friction between the telescopic rod 12 and the track 21 is reduced, avoiding wear of the telescopic rod 12 and reducing the detection accuracy of the detection mechanism.

[0025] In this embodiment, detection mechanisms are provided at both ends of the bridge crane trolley 2 on both sides, and the four detection mechanisms facilitate accurate detection of the four wheels 22 of the trolley 2.

Claims

1. A bridge crane anti-derailment alarm device, characterized in that, Includes two testing institutions, The two detection mechanisms are respectively installed at both ends of one side of the bridge crane trolley (2); The detection mechanism includes a cylinder (11), a telescopic rod (12), and a displacement sensor (13). The cylinder (11) is fixed to the trolley (2) by a fixing frame (3), and the cylinder (11) is set outside the rail (21) of the bridge crane; one end of the telescopic rod (12) is inserted into the cylinder (11), and the other end passes through the cylinder (11) and contacts the rail (21); a detection hole is provided at the end of the telescopic rod (12) away from the rail (21); a spring (14) is sleeved on the telescopic rod (12) inside the cylinder (11); one end of the spring (14) is fixed to the telescopic rod (12), and the other end is fixed to the end of the cylinder (11) away from the telescopic rod (12). The displacement sensor (13) is mounted on the cylinder (11), and the sensing component (131) of the displacement sensor (13) is inserted into the detection hole.

2. The bridge crane anti-derailment alarm device according to claim 1, characterized in that, The telescopic rod (12) has an opening at one end away from the cylinder (11); a roller (121) is vertically rotatably connected inside the opening; the roller (121) is in contact with the track (21).

3. The bridge crane anti-derailment alarm device according to claim 1, characterized in that, Both ends of the bridge crane trolley (2) are equipped with detection mechanisms.

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