Electric-hydraulic push rod brake limiting linkage protection system for coal mine underground upward conveying belt
By using the explosion -proof magnetic closer switch in the electro -hydraulic push gates of the belt under the coal mines to link with the PLC controller to detect the location of the telescopic rod of the telescopic oil cylinder, it solves the failure of the telescopic rod caused by the fault of the electro -hydraulic push bar. The problem of incoming or extending in place has achieved the effect of extending the service life of the equipment and avoiding damage.
Patent Information
- Application Number
- CN202421220560.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-01-24
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Due to the failure of the electrical control circuit or hydraulic part of the coal mine, the hydraulic push rod cannot extend or the distance is short, causing the leather grinding to run against the motor, seriously damaging the electro-hydraulic push rod. and main drive motor.
Design an electro-hydraulic push rod gate limit linkage protection system for underground conveying belts in coal mines. An explosion-proof magnetic proximity switch is used to link with the PLC controller to detect whether the telescopic rod of the telescopic cylinder moves from the locked position to the open position to ensure that the electric The belt drive motor is started only when the hydraulic push rod brake is in the correct position.
Effectively prevent the problem of telescopic oil cylinder telescopic rods that cannot be extended or extended in place, avoiding severe wear and main driver motor damage of the electro -hydraulic push rod, extending the normal service life of the equipment.
Smart Images
Figure CN222388972U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal mine conveyor belt braking, in particular to an electro-hydraulic push rod brake limit linkage protection system for underground coal mine conveyor belts. Background Art
[0002] According to Article 374 of the Coal Mine Safety Regulations, belt conveyors used in inclined shafts and tunnels must be equipped with anti-reversal devices and braking devices when transporting upward, and the main drive motor of the upward belt needs to be equipped with an electro-hydraulic push rod gate as a braking device. When the belt starts, the belt control system PLC needs to open the electro-hydraulic push rod gate first, and then the motor can operate normally. However, in actual use, it was found that due to the failure of the electrical control circuit of the electro-hydraulic push rod gate or the failure of the hydraulic part of the hydraulic rod, the hydraulic push rod of the electro-hydraulic push rod gate cannot be extended or the extension distance is short. After the main drive motor is running, the electro-hydraulic push rod gate skin rubs against the motor wheel operation, and the electro-hydraulic push rod gate skin is severely worn, reducing the normal service life. In severe cases, it may cause damage to the main drive motor. Utility Model Content
[0003] The utility model aims to solve the above problems, thereby providing a coal mine underground upper conveying belt electro-hydraulic push rod gate limit linkage protection system.
[0004] The utility model solves the above problems and adopts the following technical solutions:
[0005] A limit linkage protection system for an electro-hydraulic push rod gate of an underground conveying belt in a coal mine, comprising an electro-hydraulic push rod gate and a PLC controller for controlling a belt and starting and stopping the electro-hydraulic push rod gate, the electro-hydraulic push rod gate comprising a telescopic oil cylinder and a brake mechanism for locking or releasing a rotating shaft, the telescopic rod end of the telescopic oil cylinder being hinged to the brake mechanism and being able to move between a locked position and an open position of the brake mechanism, the telescopic rod end of the telescopic oil cylinder being hinged to the brake mechanism through a pin shaft, an internal threaded hole being provided on one end surface of the pin shaft, and a high-strength magnet with an external threaded structure being screwed thereon, an explosion-proof magnetic proximity switch being provided on one side of the telescopic oil cylinder, the induction end of the explosion-proof magnetic proximity switch being facing the telescopic oil cylinder, and being at a height that is consistent with a height at which the high-strength magnet is located when the brake mechanism is in an open state, the explosion-proof magnetic proximity switch being electrically connected to the PLC controller, a supporting and fixing mechanism being provided below the explosion-proof magnetic proximity switch, the supporting and fixing mechanism being used to support and fix the explosion-proof magnetic proximity switch.
[0006] Compared with the prior art, the utility model adopting the above technical solution has the following outstanding features:
[0007] When the utility model is in use, the explosion-proof magnetic proximity switch can timely detect whether the telescopic rod of the telescopic oil cylinder moves from the locked position to the open position. After detecting that the telescopic rod is in the open position, the PLC controller can control the belt drive motor to start, which can effectively prevent the telescopic rod of the telescopic oil cylinder from being unable to extend or extending inadequately due to various reasons. After the main drive motor is running, the electro-hydraulic push rod brake shoe and the rotating shaft wheel rotate, causing the electro-hydraulic push rod brake shoe to be severely worn.
[0008] As a preferred embodiment, a further technical solution of the utility model is:
[0009] The supporting and fixing mechanism comprises an upright square tube, a connecting seat is arranged at the bottom end of the square tube, the connecting seat is fixed to the base surface by bolts, vertical mounting grooves are arranged on the two opposite side walls at the top of the square tube, and two pairs of adjusting grooves are arranged on the other two opposite side walls, the explosion-proof magnetic proximity switch is installed in the mounting groove, and adjusting screw rods are arranged in the adjusting groove and above and below the explosion-proof magnetic proximity switch, and nuts are screwed on both ends of the adjusting screw rod; the adjusting screw rod is used to support and fix the explosion-proof magnetic proximity switch, and at the same time, it is convenient to adjust the position of the explosion-proof magnetic proximity switch so that the height of the explosion-proof magnetic proximity switch is consistent with that of the high-strength magnet when the brake mechanism is opened.
[0010] A wire passing hole is provided on the top of the square tube and on the side wall below the wiring terminal of the explosion-proof magnetic proximity switch. The connecting wire of the explosion-proof magnetic proximity switch passes through the inside of the square tube through the wire passing hole; the connecting wire is protected to prevent damage. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the main structure of an embodiment of the utility model;
[0012] Figure 2 This is a schematic diagram of the top structure of the square tube in the supporting and fixing mechanism of the embodiment of the utility model;
[0013] Marked in the figure are: base surface 1, motor, electro-hydraulic push rod brake 3, telescopic cylinder 4, pin shaft 5, high-strength magnet 6, explosion-proof magnetic proximity switch 7, square tube 8, connecting seat 9, installation groove 10, adjustment groove 11, adjustment screw rod 12, connecting wire 13. DETAILED DESCRIPTION
[0014] The present invention is further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.
[0015] See also Figure 1-Figure 2, a coal mine underground upper belt electro-hydraulic push rod gate limit linkage protection system, including an electro-hydraulic push rod gate 3 and a PLC controller for controlling the belt and the start and stop of the electro-hydraulic push rod gate 3, the electro-hydraulic push rod gate 3 includes a telescopic oil cylinder 4 and a brake mechanism for locking or releasing a rotating shaft, the telescopic rod end of the telescopic oil cylinder 4 is hinged to the brake mechanism, and can move between a locked position and an open position of the brake mechanism, the telescopic rod end of the telescopic oil cylinder 4 is hinged to the brake mechanism through a pin 5, an internal threaded hole is provided on one end surface of the pin 5, and a high-strength magnet 6 with an external thread structure is screwed, an explosion-proof magnetic proximity switch 7 is provided on one side of the telescopic oil cylinder 4, the induction end of the explosion-proof magnetic proximity switch 7 faces the telescopic oil cylinder 4, and the height thereof is consistent with the height of the high-strength magnet 6 when the brake mechanism is in the open state, the explosion-proof magnetic proximity switch 7 is electrically connected to the PLC controller, and a supporting and fixing mechanism is provided below the explosion-proof magnetic proximity switch 7, the supporting and fixing mechanism is used to support and fix the explosion-proof magnetic proximity switch 7.
[0016] The supporting and fixing mechanism comprises a vertical square tube 8, a connecting seat 9 is provided at the bottom end of the square tube 8, and the connecting seat 9 is fixed to the base surface 1 through bolts. Vertical mounting grooves 10 are provided on the two opposite side walls at the top of the square tube 8, and two pairs of adjusting grooves 11 are provided on the other two opposite side walls. The explosion-proof magnetic proximity switch 7 is installed in the mounting groove 10, and an adjusting screw rod 12 is provided in the adjusting groove 11 and is located above and below the explosion-proof magnetic proximity switch 7. Nuts are screwed on both ends of the adjusting screw rod 12; the adjusting screw rod 12 clamps the explosion-proof magnetic proximity switch 7 from the top and bottom for fixing, and the adjusting screw rod 12 is adjustable up and down in the adjusting groove 11, which is convenient for adjusting the height of the explosion-proof magnetic proximity switch 7. When the brake skin of the electro-hydraulic push rod is worn, the telescopic rod of the telescopic oil cylinder 4 needs to increase the extension amount to lock the rotating shaft. At this time, the opening height of the high-strength magnet 6 will be raised. Therefore, the height of the explosion-proof magnetic proximity switch 7 needs to be adjusted so that the height of the explosion-proof magnetic proximity switch 7 and the high-strength magnet 6 when the brake mechanism is opened is consistent.
[0017] A wire hole is provided on the top of the square tube 8 and on the side wall below the terminal of the explosion-proof magnetic proximity switch 7. The connecting wire 13 of the explosion-proof magnetic proximity switch 7 passes through the inside of the square tube 8 through the wire hole; the connecting wire 13 is protected to prevent damage.
[0018] When the utility model is in use, the explosion-proof magnetic proximity switch can timely detect whether the telescopic rod of the telescopic oil cylinder moves from the locked position to the open position. After detecting that the telescopic rod is in the open position, the PLC controller can control the belt drive motor to start, which can effectively prevent the telescopic rod of the telescopic oil cylinder from being unable to extend or extending inadequately due to various reasons. After the main drive motor is running, the electro-hydraulic push rod brake shoe and the rotating shaft wheel rotate, causing the electro-hydraulic push rod brake shoe to be severely worn.
[0019] The above description is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent changes made using the contents of the present utility model specification and its drawings are included in the scope of rights of the present utility model.
Claims
1. A limit linkage protection system for an electric hydraulic push rod gate of an underground coal mine upper conveying belt, comprising an electric hydraulic push rod gate and a PLC controller for controlling the belt and the start and stop of the electric hydraulic push rod gate, wherein the electric hydraulic push rod gate comprises a telescopic oil cylinder and a brake mechanism for locking or releasing a rotating shaft, wherein the end of the telescopic rod of the telescopic oil cylinder is hinged to the brake mechanism and can move between a locked position and an open position of the brake mechanism, and wherein the system is characterized in that: The telescopic rod end of the telescopic cylinder is hinged to the brake mechanism through a pin shaft, an internal threaded hole is opened on one end surface of the pin shaft, and a high-strength magnet with an external thread structure is screwed on, an explosion-proof magnetic proximity switch is arranged on one side of the telescopic cylinder, the sensing end of the explosion-proof magnetic proximity switch faces the telescopic cylinder, and the height thereof is consistent with the height of the high-strength magnet when the brake mechanism is in the open state, the explosion-proof magnetic proximity switch is electrically connected to the PLC controller, and a supporting and fixing mechanism is arranged below the explosion-proof magnetic proximity switch, and the supporting and fixing mechanism is used to support and fix the explosion-proof magnetic proximity switch.
2. According to claim 1, a coal mine underground upper conveyor belt electro-hydraulic push rod gate limit linkage protection system, characterized in that: The supporting and fixing mechanism includes an upright square tube, a connecting seat is arranged at the bottom end of the square tube, the connecting seat is fixed to the base surface by bolts, vertical installation grooves are opened on the two opposite side walls at the top of the square tube, and two pairs of adjustment grooves are opened on the other two opposite side walls. The explosion-proof magnetic proximity switch is installed in the installation groove, and adjustment screws are arranged in the adjustment groove and above and below the explosion-proof magnetic proximity switch, and nuts are screwed on both ends of the adjustment screws.
3. According to claim 2, a coal mine underground upper conveyor belt electro-hydraulic push rod gate limit linkage protection system is characterized in that: A wire passing hole is provided on the top of the square tube and on the side wall below the wiring terminal of the explosion-proof magnetic proximity switch. The connecting wire of the explosion-proof magnetic proximity switch passes through the inside of the square tube through the wire passing hole.