A crane pulley monitoring device

Abstract

This utility model relates to a crane pulley monitoring device, belonging to the field of crane electrical equipment technology. The technical solution of this utility model is as follows: a pulley detection bracket (8) is installed on the upper part of the pulley (12), and a rechargeable wireless transmitter (1) and a pulley detection proximity switch are installed on the pulley detection bracket (8) through a pulley detection proximity switch bracket; a rechargeable wireless receiver (33), a detection relay (29), an alarm relay (35), and an alarm indicator (36) are connected in sequence, and the rechargeable wireless transmitter (1) is matched with the rechargeable wireless receiver (33). The beneficial effects of this utility model are: it can monitor the rotation of the pulley and the wear of the pulley plates in real time, and can issue a warning signal at the first time to prompt that an inspection and confirmation is needed, so as to avoid sudden damage and jamming, affecting production, causing accidents, and ensuring the safe and stable operation of the equipment.

Description

Technical Field

[0001] This utility model relates to a crane pulley monitoring device, belonging to the technical field of crane electrical equipment. Background Technology

[0002] Overhead cranes are a type of lifting equipment widely used in various industrial and mining enterprises. Due to technological requirements, overhead cranes are equipped with fixed and movable pulleys on their lifting mechanisms, along with a lifting motor, drum, wire rope, and brakes, to achieve the lifting and hoisting of heavy objects. In actual use, pulley bearing damage or severe wear of pulley plates frequently occurs, causing sudden pulley failure. Because movable pulleys are suspended in mid-air, they are difficult to inspect routinely, and sometimes they fail mid-air, unable to fall to the ground, making troubleshooting difficult. Sudden failure of movable pulleys has a significant impact on production. If movable pulley damage is not detected in time, continued operation of the lifting mechanism due to the pulley's inability to rotate may lead to operational accidents. Therefore, a pulley detection device is needed to immediately issue a warning signal when there are signs of damage to the pulley bearings or severe wear of the pulley plates, prompting inspection and confirmation to prevent sudden failure and jamming, which could affect production, cause accidents, and impact operations. Summary of the Invention

[0003] The purpose of this utility model is to provide a crane pulley monitoring device. By installing a pulley detection proximity switch on the pulley and a detection relay in the driver's cab, the rotation of the pulley and the wear of the pulley plates can be monitored in real time. It can issue a warning signal immediately to prompt for inspection and confirmation, so as to avoid sudden damage and jamming, which would affect production and cause accidents. This ensures the safe and stable operation of the equipment and solves the above-mentioned problems existing in the background technology.

[0004] The technical solution of this utility model is: a crane pulley monitoring device, comprising a rechargeable wireless transmitter, a pulley detection proximity switch bracket, a pulley detection proximity switch, a pulley detection bracket, a detection relay, a mute button, a rechargeable wireless receiver, an alarm relay, and an alarm indicator. The pulley detection bracket is installed on the upper part of the pulley, the rechargeable wireless transmitter is installed on the upper part of the pulley detection bracket, and the pulley detection proximity switch is installed on the lower part of the pulley detection bracket via the pulley detection proximity switch bracket. The number of pulley detection proximity switches matches the pulley pieces, and the distance between the pulley detection proximity switch and the edge of the pulley piece matches the detection distance of the pulley detection proximity switch and the normal deviation when the pulley piece rotates. The rechargeable wireless receiver, detection relay, alarm relay, and alarm indicator are connected in sequence, and the rechargeable wireless transmitter is matched with the rechargeable wireless receiver.

[0005] The detection distance of the pulley detection proximity switch is 20mm. When the distance between the pulley detection proximity switch and the edge of the pulley is between (20-D)mm and 20mm, the pulley is normal, where D is the normal deviation when the pulley rotates.

[0006] It also includes a mute button, which is connected to the alarm relay.

[0007] The rechargeable wireless receiver, detection relay, alarm relay, and alarm indicator are installed in the driver's cab.

[0008] The beneficial effects of this utility model are: by installing a pulley detection proximity switch on the pulley and a detection relay in the driver's cab, the rotation of the pulley and the wear of the pulley plates can be monitored in real time, and a warning signal can be issued immediately to prompt that an inspection and confirmation is needed, so as to avoid sudden damage and jamming, affecting production, causing accidents, and ensuring the safe and stable operation of the equipment. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0010] Figure 2 This is a circuit connection diagram of this utility model;

[0011] In the diagram: 1. Rechargeable wireless transmitter; 2. Pulley detection proximity switch bracket one; 3. Pulley detection proximity switch bracket two; 4. Pulley detection proximity switch one; 5. Pulley detection proximity switch two; 6. Pulley detection proximity switch three; 7. Pulley detection bracket; 8. Pulley plate one; 9. Pulley plate two; 10. Pulley plate three; 11. Pulley; 12. Pulley detection proximity switch bracket four; 13. Pulley detection proximity switch four; 14. Pulley detection proximity switch bracket five; 15. Pulley detection proximity switch five; 16. Pulley detection proximity switch bracket six; 17. Pulley detection proximity switch six; 18. Pulley plate four; 19. Pulley... 20. Wheel piece 5; 21. Pulley piece 6; 22. Normally open contact of pulley detection proximity switch 1; 23. Normally open contact of pulley detection proximity switch 2; 24. Normally open contact of pulley detection proximity switch 3; 25. Normally open contact of pulley detection proximity switch 4; 26. Normally open contact of pulley detection proximity switch 5; 27. Normally open contact of pulley detection proximity switch 6; 28. Normally open contact of rechargeable wireless receiver; 29. ​​Detection relay; 30. Mute button; 31. Normally open contact of alarm relay; 32. Normally open contact of detection relay; 33. Rechargeable wireless receiver; 34. Normally open contact of alarm relay; 35. Alarm relay; 36. Alarm indicator device. Detailed Implementation

[0012] To make the purpose, technical solution, and advantages of this utility model clearer, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described implementation cases are only a small part of this utility model, not all of them. All other implementation cases obtained by those skilled in the art based on the implementation cases of this utility model without creative effort are within the protection scope of this utility model.

[0013] A crane pulley monitoring device includes a rechargeable wireless transmitter 1, a pulley detection proximity switch bracket, a pulley detection proximity switch, a pulley detection bracket 8, a detection relay 29, a mute button 30, a rechargeable wireless receiver 33, an alarm relay 35, and an alarm indicator 36. The pulley detection bracket 8 is mounted on the upper part of the pulley 12, the rechargeable wireless transmitter 1 is mounted on the upper part of the pulley detection bracket 8, and the pulley detection proximity switch is mounted on the lower part of the pulley detection bracket 8 via a pulley detection proximity switch bracket. The number of pulley detection proximity switches matches the pulley plates, and the distance between the pulley detection proximity switch and the edge of the pulley plate matches the detection distance of the pulley detection proximity switch and the normal deviation when the pulley plate rotates. The rechargeable wireless receiver 33, the detection relay 29, the alarm relay 35, and the alarm indicator 36 are connected in sequence, and the rechargeable wireless transmitter 1 is matched with the rechargeable wireless receiver 33.

[0014] The detection distance of the pulley detection proximity switch is 20mm. When the distance between the pulley detection proximity switch and the edge of the pulley is between (20-D)mm and 20mm, the pulley is normal, where D is the normal deviation when the pulley rotates.

[0015] It also includes a mute button 30, which is connected to an alarm relay 35.

[0016] The rechargeable wireless receiver 33, detection relay 29, alarm relay 35, and alarm indicator 36 are installed in the driver's cab.

[0017] In practical applications, the pulley detection bracket 8 is mounted on the pulley 12. The rechargeable wireless transmitter 1 is mounted on the pulley detection bracket 8. The pulley detection proximity switch is fixed to the pulley detection bracket 8 through the pulley detection proximity switch bracket. The number of pulley detection proximity switches matches the number of pulleys, and each pulley detection proximity switch is used to detect the rotation of each pulley.

[0018] The normally open contacts of each pulley proximity switch are connected in parallel as the detection signal input of the rechargeable wireless transmitter 1;

[0019] The normally open contact 28 of the rechargeable wireless receiver is connected to the coil of the detection relay 29;

[0020] The normally closed contact of the mute button 30, the normally open contact of the alarm relay 31, and the coil of the alarm relay 35 are connected in series;

[0021] The normally open contact 32 of the detection relay and the coil of the alarm relay 35 are connected in series.

[0022] The normally open contact 34 of the alarm relay is connected to the alarm indicator 36. Example

[0023] Taking pulley plate 311 as an example, the detection principle and operation process of all pulley plates are similar.

[0024] During installation, adjust the pulley detection proximity switch 7 so that the distance between it and the edge of pulley plate 3 11 is set to (20-D) mm (where 20 is the detection distance of the proximity switch and D is the normal deviation when the pulley plate rotates). During crane operation, if the pulley plate 311 deviates from its normal position by more than the normal deviation D due to bearing deterioration or severe wear, and the distance between the pulley detection proximity switch 37 and the pulley plate 31's edge exceeds 20mm (whether momentarily or continuously), the pulley detection proximity switch 37 will not detect the pulley plate 311. The normally open contact 24 of the pulley detection proximity switch 3 will close, and the rechargeable wireless transmitter 1 will send a switching signal to the rechargeable wireless receiver 33. The normally open contact 28 of the rechargeable wireless receiver will close, energizing the coil of the detection relay 29, which in turn energizes the normally open contact 32 of the detection relay. The coil of the alarm relay 35 will also be energized, causing the normally open contact 31 of the alarm relay to close. The alarm relay 35 will then self-lock and energize, closing the normally open contact 34 of the alarm relay. The alarm indicator 36 will then be energized and emit a sharp sound to alert the crane operator that the pulley is malfunctioning and requires inspection. When the operator presses the mute button 30, the alarm relay 35 is de-energized, the normally open contact 34 of the alarm relay is de-energized and disconnects, and the alarm indicator device 36 is de-energized and stops sounding the alarm.

[0025] This invention can monitor the rotation of pulleys and the wear of pulley plates in real time, and can issue warning signals immediately to prompt inspection and confirmation, so as to avoid sudden damage and jamming, affecting production, causing accidents, and ensuring the safe and stable operation of equipment.

Claims

1. A crane pulley monitoring device, characterized in that: The device includes a rechargeable wireless transmitter (1), a pulley detection proximity switch bracket, a pulley detection proximity switch, a pulley detection bracket (8), a detection relay (29), a mute button (30), a rechargeable wireless receiver (33), an alarm relay (35), and an alarm indicator (36). The pulley detection bracket (8) is installed on the upper part of the pulley (12), the rechargeable wireless transmitter (1) is installed on the upper part of the pulley detection bracket (8), and the pulley detection proximity switch is installed on the lower part of the pulley detection bracket (8) through the pulley detection proximity switch bracket. The number of pulley detection proximity switches matches the pulley pieces, and the distance between the pulley detection proximity switch and the edge of the pulley piece matches the detection distance of the pulley detection proximity switch and the normal deviation when the pulley piece rotates. The rechargeable wireless receiver (33), the detection relay (29), the alarm relay (35), and the alarm indicator (36) are connected in sequence, and the rechargeable wireless transmitter (1) matches the rechargeable wireless receiver (33).

2. The overhead crane pulley monitoring device according to claim 1, characterized in that: The detection distance of the pulley detection proximity switch is 20mm. When the distance between the pulley detection proximity switch and the edge of the pulley is between (20-D)mm and 20mm, the pulley is normal, where D is the normal deviation when the pulley rotates.

3. The overhead crane pulley monitoring device according to claim 1, characterized in that: It also includes a mute button (30), which is connected to an alarm relay (35).

4. The overhead crane pulley monitoring device according to claim 1, characterized in that: The rechargeable wireless receiver (33), detection relay (29), alarm relay (35) and alarm indicator (36) are installed in the driver's cab.

Images