Automatic charging device for elevator cage

Abstract

The utility model provides an automatic charging device for an elevator cage, and belongs to the electromechanical field. Comprising a rolling cage shoe, a first transmission wheel, a second transmission wheel, a third transmission wheel, a connecting shaft, a transmission belt, a generator, a rectification voltage stabilizer, a farad capacitor, a PLC control box and direct current contactors KM1 and KM2. The first transmission wheel and the second transmission wheel are fixed to the two ends of the connecting shaft, the first transmission wheel is installed on the rolling cage shoe, the second transmission wheel is connected with the third transmission wheel through a transmission belt, the third transmission wheel is connected with the generator, the output end of the generator is connected with the input end of the rectification voltage stabilizer, and the output end of the rectification voltage stabilizer is connected to the farad capacitor. A positive terminal and a negative terminal of the farad capacitor are connected with the direct-current contactor KM1, the direct-current contactor KM2 is connected with an output power source of a wellhead wireless charging device, and the PLC control box is connected with the direct-current contactor KM1 and the direct-current contactor KM2. According to the utility model, the PLC control box controls the wireless charging device and the automatic charging device to charge the storage battery in turn, so that the storage battery can always work normally.

Description

Technical Field

[0001] This utility model relates to the field of electromechanical technology, specifically to an automatic charging device for a hoist cage. Background Technology

[0002] In 2021, the auxiliary shaft of Zhujidong Coal Mine was equipped with an automatic cage curtain door control system. The automatic cage curtain door consists of a power battery, controller, servo motor, and mechanical transmission mechanism located at the top of the cage. The opening and closing of the cage curtain door is operated by a signal hook operator using a remote control. The working power supply voltage is DC 24V.

[0003] The automatic cage curtain door power unit uses a wireless charging solution, meaning that when the cage is stopped at the upper wellhead area, the wireless charging device wirelessly charges the control power battery located on the top of the cage. However, because the lithium battery has been used for more than two years, its capacity has decreased; a video intercom function inside the cage was added in June 2023, and this system shares a power supply with the automatic cage curtain door control system; furthermore, because the cage's dwell time at the upper wellhead is relatively short and its charging current is small, the wireless charging device cannot effectively charge the battery. For these reasons, the original lithium battery for the automatic cage curtain door power unit can no longer meet normal operating requirements, frequently causing the automatic cage curtain door to stop working due to insufficient power. Therefore, electrical maintenance personnel must replace the battery on the top of the cage during daily maintenance, which leads to the following two problems: firstly, it increases the workload of maintenance personnel and occupies valuable maintenance time; secondly, if the power supply to the automatic cage curtain door fails, the door may lose its electrical interlock, causing the door to open accidentally, posing a significant safety hazard to production. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to solve the problem that the battery on the top of the cage cannot meet the normal power supply requirements.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an automatic charging device for a hoist cage, characterized in that it includes a rolling cage ear (1), a first transmission wheel (2), a connecting shaft (3), a second transmission wheel (4), a transmission belt (5), a third transmission wheel (6), a generator (7), a rectifier and voltage regulator (8), and a supercapacitor (9), and also includes a PLC control box (11) and two DC contactors KM1 and KM2; the first transmission wheel (2) and the second transmission wheel (4) are fixed to both ends of the connecting shaft (3), and the first transmission wheel (2) is installed... Mounted on the rolling can ear (1), the second transmission wheel (4) is connected to the third transmission wheel (6) via the transmission belt (5), the third transmission wheel (6) is connected to the generator (7), the output end of the generator (7) is connected to the input end of the rectifier and voltage regulator (8), the output end of the rectifier and voltage regulator (8) is connected to the supercapacitor (9), the positive and negative terminals of the supercapacitor (9) are connected to the DC contactor KM1, the DC contactor KM2 is connected to the output power of a wireless charging device (12), and the PLC control box (11) is connected to the DC contactors KM1 and KM2.

[0006] By controlling the coils of DC contactors KM1 and KM2 through the PLC control box, intelligent switching can be achieved between the wellhead wireless charging device and the automatic charging device on the tank top of this utility model to charge the battery, ensuring that the battery has sufficient power and achieving uninterrupted power supply.

[0007] Preferably, the first drive wheel (2) is mounted in close contact with the wheel tread of the rolling can ear (1) by means of a tension spring.

[0008] In this utility model, when the hoist is running, the first transmission wheel (2) will rotate with the rolling can ear (1). Through the cooperation between the transmission wheel, the connecting shaft and the transmission belt, the generator can be driven to generate electricity. Then, the rectifier and voltage regulator can be used to charge the farad capacitor for energy storage.

[0009] Preferably, the positive terminal of the rectifier regulator (8) is connected to the positive terminal of the supercapacitor (9) via a cable, and the negative terminal of the rectifier regulator (8) is connected to the negative terminal of the supercapacitor (9) via a cable.

[0010] Preferably, the positive terminal of the supercapacitor (9) is connected to the 1st and 3rd main contacts of the DC contactor KM1 via a cable, and the negative terminal of the supercapacitor (9) is connected to the 2nd and 4th main contacts of the DC contactor KM1 via a cable.

[0011] Preferably, the positive terminal of the wellhead wireless charging device (12) is connected to the 1st and 3rd main contacts of the DC contactor KM2 via a cable, and the output power of the wellhead wireless charging device (12) is connected to the 2nd and 4th main contacts of the DC contactor KM2 via a cable.

[0012] Preferably, the main contacts 1 and 3 of the DC contactor KM1 are connected to the main contacts 1 and 3 of the DC contactor KM2 via cables, and the main contacts 2 and 4 of the DC contactor KM1 are connected to the main contacts 2 and 4 of the DC contactor KM2 via cables.

[0013] Preferably, it includes a servo controller, which is connected to a DC contactor KM2 via a cable and connected to a battery (10).

[0014] Preferably, it includes a communication intercom system, which is connected to a DC contactor KM2 via a cable and connected to a storage battery (10).

[0015] Preferably, the PLC control box (11) is connected to the DC contactor KM2 via a cable and connected to the battery (10).

[0016] Preferably, the generator (7) is fixed on the mounting base, which is welded to the top of the cage.

[0017] Compared to existing technologies, the advantages of this invention are as follows: When the hoist cage stops at the charging position at the upper wellhead, the PLC control box controls the DC contactor KM1 coil to open and the DC contactor KM2 to close, at which time the wireless charging device charges the battery; when the hoist is running, the rolling cage lugs installed on the top of the cage rotate due to contact with the rigid combined cage track, and with the cooperation between the transmission wheel, connecting shaft, and transmission belt, they can drive the generator to generate electricity, which can then be converted by the rectifier and voltage regulator to charge the supercapacitor. When the PLC control box detects that the battery voltage is lower than a certain voltage value, it controls the DC contactor KM1 coil to close and the DC contactor KM2 coil to open, at which time the supercapacitor charges the battery through KM1. It can be seen that by intelligently switching between the automatic charging device and the wireless charging device of this invention to charge the battery, the problem of the battery not being able to meet the power supply demand can be solved, the safety hazards caused by the malfunction of the cage safety equipment or the failure of the interlock due to insufficient battery power can be eliminated, and maintenance personnel only need to inspect the battery once a week, reducing the labor intensity of the operators and improving the maintenance efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the automatic charging device for the hoist cage in an embodiment of this utility model. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0020] Example

[0021] like Figure 1 As shown, this embodiment provides an automatic charging device for a hoist cage, including a rolling cage ear (1), a first transmission wheel (2), a connecting shaft (3), a second transmission wheel (4), a transmission belt (5), a third transmission wheel (6), a permanent magnet generator (7), a rectifier and voltage regulator (8), a large-capacity supercapacitor (9), two DC contactors KM1 and KM2, an intelligent switching automatic charging PLC control box (11), an automatic cage curtain door servo controller, and an in-cage video communication intercom system.

[0022] In this embodiment, the diameter of the first transmission wheel (2) is 80mm, the diameter of the connecting shaft (3) is 20mm and the length is 300mm, the diameter of the second transmission wheel (4) is 50mm, the diameter of the third transmission wheel (6) is 95mm, and the maximum power of the permanent magnet generator (7) is 800W. In other embodiments, the size and model of each part of the device can be selected in other ways as long as the power supply requirements are met.

[0023] The first transmission wheel (2), fixed to the end of the connecting shaft (3), is mounted close to the tread of the rolling cage ear (1). The second transmission wheel (4) is mounted on the other end of the connecting shaft (3) and fixed. The AC permanent magnet generator (5) is fixed on the mounting base, which is welded to the top of the cage. The third transmission wheel (6) is connected to the second transmission wheel (4) via a transmission belt (5). The third transmission wheel (6) is connected to the permanent magnet generator (5). The output end of the permanent magnet generator (5) is connected to the input end of the rectifier voltage regulator (8). The positive and negative terminals of the output end of the rectifier voltage regulator (8) are connected to the positive and negative terminals of the supercapacitor (9) via cables.

[0024] The positive and negative terminals of the farad capacitor (9) are connected to the main contacts 1 and 3 and the main contacts 2 and 4 of the DC contactor KM1 via cables, and are also connected to the positive and negative terminals of the lead-acid battery (10) via cables. The output power of the wellhead wireless charging device (12) is connected to the main contacts 1 and 3 and the main contacts 2 and 4 of the DC contactor KM2, and is also connected to the positive and negative terminals of the lead-acid battery (10) via cables.

[0025] The lead-acid battery (10) simultaneously supplies power to the automatic tank curtain door servo controller, the in-tank video communication intercom system and the intelligent switching automatic charging PLC control box (11).

[0026] When the hoist cage stops at the charging position at the upper wellhead, the intelligent switching automatic charging PLC control box (11) controls the DC contactor KM1 coil to open and the DC contactor KM2 coil to close. At this time, the wireless charging device (12) charges the lead-acid battery (10).

[0027] When the hoist is running, the rolling cage ear (1) installed on the top of the cage rotates due to contact with the rigid combined cage channel. The first transmission wheel (2) rotates with the rolling cage ear (1) and drives the second transmission wheel (4) to rotate through the connecting shaft (3). The second transmission wheel (4) drives the third transmission wheel (6) to rotate through the transmission belt (5), thereby driving the permanent magnet generator (7) to generate electricity. The three-phase AC24V power output by the permanent magnet generator (7) is converted into DC26.5V charging power through the rectifier and voltage regulator (8) to charge the large-capacity supercapacitor (9). When the intelligent switching automatic charging PLC control box (11) detects that the battery voltage is lower than 20V, it controls the coil of DC contactor KM1 to be energized and the coil of DC contactor KM2 to be de-energized. At this time, the supercapacitor (9) charges the lead-acid battery (10) through the DC contactor KM1.

[0028] This invention utilizes the rolling lugs on the cage to drive an AC generator to rotate and generate electricity. The generated electrical energy is rectified by a rectifier and stored in a large-capacity supercapacitor. When the PLC control box detects that the battery voltage is below 20V, it quickly charges the battery; otherwise, it charges the battery via a wireless charging device. The PLC control box intelligently switches between automatic charging and the wireless charging device at the wellhead and the automatic charging device on the top of the cage, allowing them to alternately charge the lead-acid battery. The two devices are interlocked to ensure sufficient battery power and uninterrupted power supply to the cage equipment.

[0029] After using this utility model device, the battery power is always kept in good condition, avoiding the permanent damage to the battery body caused by repeated depletion of lead-acid batteries. Assuming that each cage can save 8 batteries per year and save 30 minutes of battery replacement time per day, with each battery costing 4,500 yuan and two hoists and three cages in the auxiliary shaft, the annual savings in battery materials is 6 × 3 × 4,500 = 81,000 yuan; the annual savings in maintenance time is 350 × 0.5 = 175 hours.

[0030] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of protection of the present utility model. Therefore, any equivalent changes made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An automatic charging device for a cage of an elevator, characterized in that, The utility model relates to a kind of wellhead wireless charging device, including rolling cage ear (1), first transmission wheel (2), connecting shaft (3), second transmission wheel (4), transmission belt (5), third transmission wheel (6), generator (7), rectifier stabilizer (8) and farad capacitor (9), still including PLC control box (11) and two direct current contactors KM1, KM2;First transmission wheel (2), second transmission wheel (4) are fixed to the both ends of connecting shaft (3), first transmission wheel (2) is installed on rolling cage ear (1), second transmission wheel (4) is connected with third transmission wheel (6) by transmission belt (5), third transmission wheel (6) is connected with generator (7), the output end of generator (7) is connected with the input end of rectifier stabilizer (8), the output end of rectifier stabilizer (8) is connected to farad capacitor (9), the positive and negative terminal block of farad capacitor (9) is connected with direct current contactor KM1, direct current contactor KM2 is connected with the output power supply of one wellhead wireless charging device (12), the PLC control box (11) is connected with direct current contactor KM1, KM2.

2. The automatic charging device for the cage of the hoist according to claim 1, characterized in that, The first transmission wheel (2) is installed by being tightly attached to the tread of rolling cage ear (1) by tension spring.

3. The automatic charging device for the cage of the hoist according to claim 1, characterized in that, The positive terminal block of the rectifier stabilizer (8) is connected to the positive terminal block of farad capacitor (9) by cable, and the negative terminal block of the rectifier stabilizer (8) is connected to the negative terminal block of farad capacitor (9) by cable.

4. The automatic charging device for the cage of the hoist according to claim 3, characterized in that, The positive terminal block of the farad capacitor (9) is connected to the 1, 3 main contacts of the direct current contactor KM1 by cable, and the negative terminal block of the farad capacitor (9) is connected to the 2, 4 main contacts of the direct current contactor KM1 by cable.

5. The automatic charging device for the cage of the hoist according to claim 1, characterized in that, The output power supply of the wellhead wireless charging device (12) is connected to the 1, 3 main contacts of the direct current contactor KM2 by cable, and the negative terminal block of the wellhead wireless charging device (12) is connected to the 2, 4 main contacts of the direct current contactor KM2 by cable.

6. An automatic charging device for an elevator cage according to claim 4 or 5, characterized in that The 1, 3 main contacts of the direct current contactor KM1 are connected to the 1, 3 main contacts of the direct current contactor KM2 by cable, and the 2, 4 main contacts of the direct current contactor KM1 are connected to the 2, 4 main contacts of the direct current contactor KM2 by cable.

7. An automatic charging device for an elevator cage according to claim 6, characterized in that The servo controller is connected to the direct current contactor KM2 and the battery (10) by cable.

8. The automatic charging device for an elevator cage according to claim 7, characterized in that, The communication intercom system is connected to the direct current contactor KM2 and the battery (10) by cable.

9. The automatic charging device for an elevator cage according to claim 8, characterized in that, The PLC control box (11) is connected to the direct current contactor KM2 and the battery (10) by cable.

10. The automatic charging device for an elevator cage according to claim 1, characterized in that, The generator (7) is fixed on the installation base, and the base is welded on the top of the cage.

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