Underground metal mine winch brake shoe clearance monitoring system

Abstract

The utility model discloses an underground metal mine winch brake-shoe clearance monitoring system which solves the problem that an old hoisting system is not provided with brake-shoe clearance monitoring. The monitoring system comprises a sensor L-shaped base, a sensor detection iron plate, a displacement sensor, a PLC (Programmable Logic Controller), an upper computer touch screen and an audible and visual alarm; the outer surface of the brake body is connected with a sensor base which is connected with a displacement sensor, and the brake block is connected with a sensor detection iron plate. The displacement sensor is connected with the input end of the PLC, and the output end of the PLC is connected with the upper computer touch screen, the audible and visual alarm and the elevator master control system safety circuit at the same time. According to the utility model, the installation is simple, the PLC collects analog quantity current signals of the sensor, the PLC accurately and reliably calculates the variable quantity of the action of the brake block, namely the brake shoe clearance value, the variable quantity is visually displayed on a main picture of a touch screen of an upper computer, and meanwhile, an alarm prompt function is provided, so that the brake function of a lifting system is ensured to be effective.

Description

Technical Field

[0001] The utility model belongs to the technical field of winch brakes in underground metal mines. It is a brake shoe gap monitoring system for winches in underground metal mines. When the winch is running, the operator can observe the brake shoe gap value of the winch in real time and intuitively. It is a real-time and accurate winch brake shoe gap monitoring and alarm prompting technology. Background Art

[0002] Because an underground metal mine was built early, the winch with a drum diameter of 1.6 meters was not equipped with brake shoe gap monitoring. As the standard requirements become increasingly stringent, the winch hoisting system needs to have real-time monitoring and alarm of the brake shoe gap (that is, the gap between the brake and the brake disc) to further improve the reliability of the braking part of the mine hoisting system. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide an underground metal mine hoist brake shoe gap monitoring system in view of the deficiencies of the above-mentioned prior art. The underground metal mine hoist brake shoe gap monitoring system can monitor in real time whether the gap between the brake block (brake shoe) and the brake disc is within the specified range, and has an alarm prompt function to ensure that the braking function of the lifting system is effective.

[0004] In order to achieve the above technical purpose, the technical solution adopted by the utility model is:

[0005] A brake shoe clearance monitoring system for an underground metal mine winch includes a winch brake, the winch brake includes a brake block, a brake body and a brake disc; brake blocks and brake bodies are arranged on both sides of the brake disc, a piston is slidably connected inside the brake body and one end of the piston is connected to the brake block, the inside of the brake body is connected to a hydraulic station through an oil pipe, and the hydraulic station is used to transport hydraulic oil to the inside of the brake body through the oil pipe, thereby pushing the piston to move and thus pushing the brake block to move toward the brake disc;

[0006] It also includes a sensor L-shaped base, a sensor detection iron plate, a displacement sensor, a PLC controller, a host computer touch screen, and an audible and visual alarm;

[0007] The outer surface of the brake body is connected to a sensor base, which is connected to a displacement sensor, and a sensor detection iron plate is connected to the brake block; the displacement sensor is connected to the input end of the PLC controller, and the output end of the PLC controller is simultaneously connected to the upper computer touch screen, the sound and light alarm, and the safety circuit of the hoist main control system.

[0008] As a further improved technical solution of the utility model, the sensor base is an L-shaped sensor base, and the outer surface of the brake body is connected to the L-shaped sensor base by screws.

[0009] As a further improved technical solution of the utility model, a waist-shaped hole is opened on the sensor base, and the waist-shaped hole on the sensor base is connected to the displacement sensor.

[0010] As a further improved technical solution of the utility model, the output end of the PLC controller is connected to the safety circuit of the hoist main control system through a relay.

[0011] The beneficial effects of the utility model are:

[0012] 1. This underground metal mine winch brake shoe gap monitoring system adjusts the displacement sensor and the sensor to detect the maximum parallel surface of the iron plate. The touch screen displays the distance between the brake block and the brake body when the brake is engaged, which is convenient for selecting the most linear detection distance of the sensor during installation and debugging. At the same time, the sensor outputs an analog current signal of 4-20Ma to further improve the anti-interference ability and ensure the accuracy of the brake shoe gap data.

[0013] 2. This underground metal mine winch brake shoe gap monitoring system can be installed with displacement sensors and sensor detection iron plates on each set of brake blocks and brake bodies. The brake shoe gap value can be intuitively observed through the upper computer touch screen, and corresponding sound and light alarms can be made in time according to different types of faults or the safety circuit of the hoist main control system can be controlled, thereby reducing malfunctions and ensuring the reliability of the lifting system braking.

[0014] 3. Provide a low-cost and easy-to-implement hoist brake shoe gap monitoring system for old mines to carry out safety rectification in accordance with new regulations and new requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of a set of disc brakes.

[0016] Figure 2 This is a circuit diagram of the utility model.

[0017] Figure 1 Middle: 1. Brake disc; 2. Inner brake body; 3. Outer brake body; 4. Inner brake pad; 5. Outer brake pad; 6. Sensor base; 7. Sensor detection iron plate; 8. Displacement sensor. DETAILED DESCRIPTION

[0018] The specific implementation of the utility model is further described below according to the accompanying drawings:

[0019] The winch braking device of this embodiment includes a hydraulic station and a disc brake, and the disc brake includes a brake block, a brake body and a brake disc 1; brake blocks and a brake body are arranged on both sides of the brake disc 1, specifically, Figure 1As shown, one side of the brake disc 1 is provided with an inner brake body 2 and an inner brake pad 4, and the other side of the brake disc 1 is provided with an outer brake body 3 and an outer brake pad 5. The inner side of the inner brake body 2 is slidably connected with a piston and the piston ( Figure 1 The structure is simplified, and one end of the piston is not shown) connected to the inner brake block 4. The inner cavity of the inner brake body 2 is connected to the hydraulic station through an oil pipe, and the oil pipe is used to transport hydraulic oil. When the hydraulic oil transported by the hydraulic station through the oil pipe enters the inner brake body 2, it pushes the piston to move, thereby pushing the inner brake block 4 to move toward the brake disc 1 fixed on the reel. Similarly, the inner part of the outer brake body 3 is slidably connected to the piston and one end of the piston is connected to the outer brake block 5. The inner cavity of the outer brake body 3 is connected to the hydraulic station through an oil pipe, and the oil pipe is used to transport hydraulic oil. When the hydraulic oil transported by the hydraulic station through the oil pipe enters the inner part of the outer brake body 3, it pushes the piston to move, thereby pushing the outer brake block 5 to move toward the brake disc 1 fixed on the reel. When the brake blocks on both sides of the inner and outer sides press against the brake disc 1 fixed on the reel, friction braking occurs, thereby achieving a control effect.

[0020] Based on the above winch braking device, this embodiment provides an underground metal mine winch brake shoe gap monitoring system, including a sensor L-shaped base 6, a sensor detection iron plate 8, a displacement sensor 7, a PLC controller, a host computer touch screen and an audible and visual alarm.

[0021] The outer surfaces of the inner brake body 2 and the outer brake body 3 are connected with a sensor base 6, the sensor base 6 is connected with a displacement sensor 7, and the inner brake block 4 and the outer brake block 5 are connected with a sensor detection iron plate 8; the displacement sensor 7 is connected to the input end of the PLC controller, and the output end of the PLC controller is also connected to the upper computer touch screen, the sound and light alarm and the safety circuit of the hoist main control system.

[0022] The sensor base 6 is an L-shaped sensor base, and the outer surfaces of the inner brake body 2 and the outer brake body 3 are connected to the L-shaped sensor base through screws.

[0023] The sensor base 6 is provided with a waist-shaped hole, and the waist-shaped hole on the sensor base 6 is connected to the displacement sensor 7. The waist-shaped hole can better adjust the upper and lower positions of the displacement sensor 7. The sensor detection iron plate 8 is fixed on the inner brake block 4. During the process from brake engagement to brake release, the distance between the displacement sensor 7 and the sensor detection iron plate 8 will change from large to small. The change is the distance between the inner brake block 4 and the brake disc 1, that is, the brake shoe gap value calculated by the PLC controller. The outer brake block 5 has the same action state as the inner brake block 4, and will not be repeated here.

[0024] The output end of the PLC controller is connected to the safety circuit of the hoist main control system through a relay.

[0025] The circuit diagram of the underground metal mine hoist brake shoe gap monitoring system of this embodiment is as follows: Figure 2 As shown, the PLC controller includes Siemens S7-200 and AE08 analog input module, and the displacement sensor uses the photoelectric sensor DW-AD-509-M18-390. The models of the host computer touch screen and sound and light alarm use the existing common models, and the relay uses the brake shoe over-limit relay. Among them, the displacement sensor is connected to the AE08 analog input module, Figure 2 Only one displacement sensor is drawn in the figure. If there are multiple displacement sensors, the multiple displacement sensors are connected to the 0+, 0- to 7+, 7- pins of the AE08 analog input module respectively, the AE08 analog input module is connected to the S7-200, the S7-200 is connected to the upper computer touch screen through the network cable, the pins 2M and 0 of the S7-200 are connected to the sound and light alarm, the pins 2M and 1 of the S7-200 are connected to the two ends of the coil in the relay, and the normally open contact of the relay is connected to the safety circuit of the hoist main control system. The PLC controller, displacement sensor, upper computer touch screen, etc. are powered by a 24V power supply.

[0026] The displacement sensor is a high-precision displacement sensor. The high-precision displacement sensor transmits the detected analog signal to the analog input module of the PLC controller. The signal collected by the PLC controller is processed by S7-200 and displayed on the upper computer touch screen. At the same time, the upper computer touch screen also has a brake shoe initial value monitoring screen. When the gap value of a brake shoe in a group exceeds the 2mm specified in the regulations, the sound and light alarm will receive the command issued by the PLC controller. When the gap of a group of brake shoes exceeds the 2mm specified in the regulations, the PLC controller will output the switch value to the safety circuit of the hoist main control system. The upper computer touch screen monitoring screen displays the main screen of the brake shoe gap and the distance between the high-precision displacement sensor and the sensor detection iron plate.

[0027] The high-precision displacement sensor outputs a 4-20mA current signal. When the detection distance of only one high-precision displacement sensor in a group of brakes exceeds 2mm, the sound and light alarm will be activated. When the detection distance of two high-precision displacement sensors in a group of brakes exceeds 2mm, the PLC controller will output the switch quantity to the safety circuit program of the main system of the hoist. The PLC controller completes the processing, calculation and storage of the collected analog data, and controls the sound and light alarm and the main system safety circuit according to the monitoring result output. The upper computer touch screen displays the value of each group of brake shoe gap in real time, providing intuitive numbers for the winch driver. The high-precision displacement sensor completes the collection and processing of the analog quantity required for brake shoe gap detection, and sends it to the PLC controller. The monitoring screen displays the main screen of the brake shoe gap and the distance between the high-precision displacement sensor and the sensor detection iron plate.

[0028] The PLC controller collects the 4-20mA analog current signal of the displacement sensor, and after program operation, transmits the operation result to the upper computer touch screen. The main screen of the touch screen provides the winch driver with an intuitive brake shoe gap value. At the same time, if one of the brake shoes calculated exceeds 2mm, the PLC controller will output a signal to control the sound and light alarm to remind the winch driver. If a group of brake shoes are calculated to exceed 2mm, the PLC controller will output a switch signal to the safety circuit of the main system of the hoist. The safety circuit of the main system of the hoist will automatically cut off the hoist power supply, so that the hoist is braked, reminding the winch driver to detect and repair the brake fault to ensure the effectiveness of the brake function. Two fault actions occur, reducing the possibility of malfunction and ensuring the reliability of the lifting system braking. The auxiliary screen of the upper computer touch screen shows the distance between the high-precision displacement sensor and the sensor detection iron plate to the installation and debugging personnel, which is convenient for installing the sensor so that it can work within the most linear working distance, further ensuring the reliability and accuracy of the collected data.

[0029] Furthermore, the high-precision displacement sensor outputs a 4-20mA current signal with strong anti-interference ability. Even if the wire resistance changes, it will not affect the current size. It also has a sensor disconnection fault function, providing the system with reliable and accurate data.

[0030] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A brake shoe clearance monitoring system for an underground metal mine winch, comprising a winch brake, the winch brake comprising a brake pad, a brake body and a brake disc; brake pads and a brake body are arranged on both sides of the brake disc, a piston is slidably connected inside the brake body and one end of the piston is connected to the brake pad, the inside of the brake body is connected to a hydraulic station through an oil pipe, and the hydraulic station is used to transport hydraulic oil to the inside of the brake body through the oil pipe, thereby pushing the piston to move and thus pushing the brake pad to move toward the brake disc; It is characterized in that It also includes a sensor L-shaped base, a sensor detection iron plate, a displacement sensor, a PLC controller, a host computer touch screen, and an audible and visual alarm; The outer surface of the brake body is connected to a sensor base, which is connected to a displacement sensor, and a sensor detection iron plate is connected to the brake block; the displacement sensor is connected to the input end of the PLC controller, and the output end of the PLC controller is simultaneously connected to the upper computer touch screen, the sound and light alarm, and the safety circuit of the hoist main control system.

2. The underground metal mine hoist brake shoe gap monitoring system according to claim 1, characterized in that: The sensor base is an L-shaped sensor base, and the outer surface of the brake body is connected to the L-shaped sensor base through screws.

3. The underground metal mine hoist brake shoe gap monitoring system according to claim 1, characterized in that: The sensor base is provided with a waist-shaped hole, and the waist-shaped hole on the sensor base is connected with the displacement sensor.

4. The underground metal mine hoist brake shoe gap monitoring system according to claim 1, characterized in that: The output end of the PLC controller is connected to the safety circuit of the hoist main control system through a relay.

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