Automatic stopping circuit of heading machine

Abstract

The utility model discloses an automatic stopping circuit of a heading machine, relates to the technical field of coal mine electromechanics, and solves the problem that secondary transportation vehicle pressing is easily caused by coal gangue accumulation of a secondary transportation machine head of the heading machine in the prior art. Comprising a heading machine controller, a plurality of intermediate relays, a right rear system emergency stop switch, a left middle system emergency stop switch, a left rear system emergency stop switch and a coal piling sensor, a protection circuit is additionally arranged on a secondary conveying machine head of the heading machine, and a protection node is connected to a heading machine emergency stop loop in series. A heading machine control loop power supply is automatically cut off, so that a main circuit is disconnected to achieve the protection purpose; according to the utility model, the safety of equipment and personnel is protected, the safe production of a mine is guaranteed, and the circuit is simple in structure, easy to realize and lower in maintenance cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine electromechanics and relates to an automatic stop circuit for a roadheader. Background Art

[0002] The roadheader can realize continuous cutting, loading and transporting operations, and is widely used in the driving of coal roadways, semi-coal rock roadways and soft rock roadways with relatively large dip angles. It can also be used in tunnels such as railways, highways and hydraulic engineering. Due to the harsh production environment at the coal mine driving face, during normal tunneling, only the main and deputy roadheader drivers operate on the roadheader body, and the rest of the personnel are all evacuated to a safe location more than ten meters away from the roadheader. This causes that when the second conveyor of the roadheader stops due to a fault or other reasons, the roadheader is still normally tunneling and discharging. As a result, the loading point (at the head of the second conveyor) is blocked by coal gangue, which is commonly known as "jamming the second conveyor". In the light case, equipment is damaged, and in the heavy case, personnel are injured, affecting the safe production of the mine.

[0003] In this regard, the existing technologies currently have the following disadvantages: The first conveyor of the roadheader is hydraulically driven, and the second conveyor is electrically driven. There is no connection between the two. The working positions of the main and deputy drivers of the roadheader are at the front part of the roadheader body, and the operation regulations stipulate that when the roadheader is operating, personnel must withdraw to a safe distance behind the operation site. This safe distance is generally stipulated as ten meters. This causes that when the second conveyor stops running due to a fault, the dust is flying at the driving face, and the main and deputy drivers of the roadheader simply cannot find that the second conveyor has stopped running. As a result, the head of the second conveyor is blocked by coal gangue. The accumulated coal gangue will block the roadway, affect the normal ventilation of the mine, and cause gas accumulation and gas overrun accidents. The accumulated coal increases the load of the conveyor, and heavy-load starting may cause damage to the coupling and may burn out the motor; the accumulated coal gangue buries the tail of the conveyor, and forced driving may cause the conveyor to slip and is prone to accidents such as belt breakage; the burning of the slipping belt will also generate toxic and harmful gases, which may cause suffocation accidents for personnel. It seriously affects the safe production of the mine. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is that in the prior art, the accumulation of coal gangue at the head of the second conveyor of the roadheader easily causes the situation of jamming the second conveyor.

[0005] The utility model solves the above technical problem through the following technical solutions:

[0006] An automatic stop circuit for a roadheader, comprising a roadheader controller, several intermediate relays, a right-rear system emergency stop switch, a left-middle system emergency stop switch, a left-rear system emergency stop switch, and a coal accumulation sensor; one end of the roadheader controller is connected to several intermediate relays, the other ends of the several intermediate relays are connected together and connected to one end of the right-rear system emergency stop switch, the other end of the right-rear system emergency stop switch is connected to one end of the left-middle system emergency stop switch, the other end of the left-middle system emergency stop switch is connected to one end of the left-rear system emergency stop switch, the other end of the left-rear system emergency stop switch is connected to one end of the coal accumulation sensor, and the other end of the coal accumulation sensor is connected to the power supply.

[0007] Further, the several intermediate relays are specifically intermediate relay KA1, intermediate relay KA2, intermediate relay KA4, intermediate relay KA5, intermediate relay KA6, intermediate relay KA7, intermediate relay KA9, intermediate relay KA10, intermediate relay KA11, intermediate relay KA12, intermediate relay KA13. One end of intermediate relay KA1, one end of intermediate relay KA2, one end of intermediate relay KA4, one end of intermediate relay KA5, one end of intermediate relay KA6, one end of intermediate relay KA7, one end of intermediate relay KA9, one end of intermediate relay KA10, one end of intermediate relay KA11, and one end of intermediate relay KA13 are respectively connected to the roadheader controller; the other end of intermediate relay KA1, the other end of intermediate relay KA2, the other end of intermediate relay KA4, the other end of intermediate relay KA5, the other end of intermediate relay KA6, the other end of intermediate relay KA7, the other end of intermediate relay KA9, the other end of intermediate relay KA10, the other end of intermediate relay KA11, the other end of intermediate relay KA13, and one end of intermediate relay KA12 are connected together and connected to one end of the right-rear system emergency stop switch.

[0008] Further, the models of the several intermediate relays are all AHN22324.

[0009] Further, the models of the right-rear system emergency stop switch, the left-middle system emergency stop switch, and the left-rear system emergency stop switch are all BZA2-5 / 36J(A).

[0010] Further, the model of the coal accumulation sensor is GUJ35.

[0011] Further, the model of the roadheader controller is SYMC-2M.

[0012] The advantages of the present utility model are as follows:

[0013] The utility model effectively prevents the accumulation of coal gangue at the head of the second conveyor of the roadheader by adding a protection device at the head of the second conveyor of the roadheader, connecting the protection node in series to the emergency stop circuit of the roadheader, detecting the accumulation of coal gangue through the mechanical probe of the coal accumulation sensor, and controlling the emergency stop circuit through the contact linked by the mechanical probe of the coal accumulation sensor. It protects the safety of equipment and personnel, ensures the safe production of the mine. At the same time, the circuit structure of this application is simple, easy to implement, and has a low maintenance cost. Brief Description of the Drawings

[0014] Figure 1 It is the circuit diagram of an automatic parking circuit of a roadheader according to Embodiment 1 of the utility model. Detailed Implementation Modes

[0015] To make the objectives, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are some but not all of the embodiments of the utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the scope of protection of the utility model.

[0016] The technical solutions of the utility model will be further described below in conjunction with the drawings of the specification and specific embodiments:

[0017] Embodiment 1

[0018] As Figure 1 shown, it is the circuit diagram of an automatic parking circuit of a roadheader according to Embodiment 1 of the utility model, and the components therein are:

[0019] The roadheader controller, model SYMC-2M, receives various external instructions and issues signals for starting, stopping, and various protections. It also includes several intermediate relays. Specifically, intermediate relay KA1 is responsible for controlling the operation of the oil pump, intermediate relay KA2 is responsible for controlling high-speed operation, intermediate relay KA4 is responsible for controlling the operation of the second conveyor, and intermediate relay KA5 is responsible for controlling the dust removal operation. The above intermediate relays KA1-KA5 are responsible for controlling the start and stop of each motor of the roadheader. It also includes intermediate relay KA6 responsible for controlling the leakage locking of the oil pump, intermediate relay KA7 responsible for controlling the leakage locking of the cutting unit, intermediate relay KA9 responsible for controlling the leakage locking of the second conveyor, and intermediate relay KA10 responsible for controlling the leakage operation of the dust removal. The above intermediate relays KA6-KA10 are all leakage protection relays. Intermediate relay KA11 controls the bell signal. Intermediate relay KA12 is a control relay for the emergency stop circuit. Intermediate relay KA13 is responsible for controlling the automatic lubrication solenoid valve. The above intermediate relays KA1-KA13 are all of model AHN22324, and the coil voltage is DC24V. It also includes an emergency stop switch for the right rear system, an emergency stop switch for the left middle system, and an emergency stop switch for the left rear system. The emergency stop switches for the right rear system, the left middle system, and the left rear system are connected in series in turn to form the emergency stop circuit of the roadheader. If any emergency stop switch is pressed, all functions of the roadheader will stop completely. The model of the emergency stop switch is BZA2-5 / 36J(A). The coal accumulation protection unit includes a coal accumulation sensor, and the model of the coal accumulation sensor is GUJ35. Its normally closed node is connected in series to the emergency stop circuit of the roadheader.

[0020] The roadheader controller is connected to one end of intermediate relay KA1, one end of intermediate relay KA2, one end of intermediate relay KA4, one end of intermediate relay KA5, one end of intermediate relay KA6, one end of intermediate relay KA7, one end of intermediate relay KA9, one end of intermediate relay KA10, one end of intermediate relay KA11, and one end of intermediate relay KA13 respectively. The other ends of intermediate relay KA1, intermediate relay KA2, intermediate relay KA4, intermediate relay KA5, intermediate relay KA6, intermediate relay KA7, intermediate relay KA9, intermediate relay KA10, intermediate relay KA11, intermediate relay KA13, and one end of intermediate relay KA12 are connected together and connected to one end of the emergency stop switch for the right rear system. The other end of the emergency stop switch for the right rear system is connected to one end of the emergency stop switch for the left middle system. The other end of the emergency stop switch for the left middle system is connected to one end of the emergency stop switch for the left rear system. The other end of the emergency stop switch for the left rear system is connected to one end of the coal accumulation protection unit, and the other end of the coal accumulation protection unit is connected to the power supply.

[0021] Usage method:

[0022] Hang the coal heap sensor above the driving sprocket of the first conveyor of the roadheader (or install and fix it on the frame of the second conveyor). The horizontal position of the sensor contact should be directly above the coal falling point and should be in the middle of the belt surface of the second conveyor. The distance from the highest point of the upper belt surface of the lower belt should not be greater than 500 mm (the position can be flexibly adjusted according to the actual situation). The normally closed contact of the coal heap sensor is connected in series to the emergency stop circuit of the roadheader. The roadheader starts normal operation. During the operation, if coal accumulates at the head of the second conveyor and reaches a certain level, the normally closed contact of the coal heap sensor disconnects, the emergency stop wire of the equipment system breaks, the pump stops, and the cutting stops. It plays a protective role.

[0023] In this application, a protection device is added to the head of the second conveyor of the roadheader, and the protection node is connected in series to the emergency stop circuit of the roadheader. When the amount of coal accumulated at the head of the second conveyor reaches a certain level, the power supply of the control circuit of the roadheader is automatically cut off, and the main circuit is disconnected to achieve the protection purpose. By detecting the accumulation of coal gangue through the mechanical probe of the coal heap sensor, and controlling the emergency stop circuit through the contact linked by the mechanical probe of the coal heap sensor, the accumulation of coal gangue at the head of the second conveyor can be effectively prevented, protecting the safety of equipment and personnel, ensuring the safe production of the mine. At the same time, the circuit structure of this application is simple, easy to implement, and has a low maintenance cost.

[0024] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A roadheader automatic parking circuit, characterized in that: It includes a tunnel boring machine controller, several intermediate relays, a right rear system emergency stop switch, a left middle system emergency stop switch, a left rear system emergency stop switch, and a coal pile sensor; the tunnel boring machine controller is connected to one end of the several intermediate relays, the other ends of the several intermediate relays are connected together and connected to one end of the right rear system emergency stop switch, the other end of the right rear system emergency stop switch is connected to one end of the left middle system emergency stop switch, the other end of the left middle system emergency stop switch is connected to one end of the left rear system emergency stop switch, the other end of the left rear system emergency stop switch is connected to one end of the coal pile sensor, and the other end of the coal pile sensor is connected to a power supply.

2. The automatic parking circuit of a tunnel boring machine according to claim 1, characterized in that: The several intermediate relays are specifically intermediate relay KA1, intermediate relay KA2, intermediate relay KA4, intermediate relay KA5, intermediate relay KA6, intermediate relay KA7, intermediate relay KA9, intermediate relay KA10, intermediate relay KA11, intermediate relay KA12, and intermediate relay KA13. One end of the intermediate relay KA1, one end of the intermediate relay KA2, one end of the intermediate relay KA4, one end of the intermediate relay KA5, one end of the intermediate relay KA6, one end of the intermediate relay KA7, one end of the intermediate relay KA9, one end of the intermediate relay KA10, one end of the intermediate relay KA11, and one end of the intermediate relay KA13 are connected one by one to the tunnel boring machine controller; the other end of the intermediate relay KA1, the other end of the intermediate relay KA2, the other end of the intermediate relay KA4, the other end of the intermediate relay KA5, the other end of the intermediate relay KA6, the other end of the intermediate relay KA7, the other end of the intermediate relay KA9, the other end of the intermediate relay KA10, the other end of the intermediate relay KA11, the other end of the intermediate relay KA13, and one end of the intermediate relay KA12 are connected together and connected to one end of the right rear system emergency stop switch.

3. The automatic parking circuit of a tunnel boring machine according to claim 2, characterized in that: The models of the several intermediate relays are all AHN22324.

4. The automatic parking circuit of a roadheader according to claim 1, characterized in that: The models of the right rear system emergency stop switch, the left middle system emergency stop switch, and the left rear system emergency stop switch are all BZA2-5 / 36J(A).

5. The automatic parking circuit of a roadheader according to claim 1, characterized in that: The coal pile sensor model is GUJ35.

6. The automatic parking circuit of a roadheader according to claim 1, characterized in that: The model of the tunnel boring machine controller is SYMC-2M.

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