Self-moving tail electric control system

Abstract

The utility model relates to the technical field of mining equipment, in particular to a self-moving tail electric control system, which comprises a local control unit, a remote terminal and a switching control unit, the local control unit generates different enable signals, the enable signals comprise a first enable signal, a second enable signal and a third enable signal, and the remote terminal is connected with the switching control unit. The remote terminal is in communication connection with the local control unit, the remote terminal is used for generating different trigger signals, and the local control unit generates a first enable signal and a second enable signal under the action of the trigger signals; the switching control unit is used for conducting remote control disconnection, remote control starting and operation control mode switching on a control loop of the hydraulic pump according to the first enabling signal, the second enabling signal and the third enabling signal, and the operation control modes comprise the manual operation mode, the remote operation mode and the emergency operation mode. According to the utility model, a plurality of control modes for operating the self-moving tail can be provided, the control modes can be switched safely and conveniently, and the automatic production requirement of an underground coal mine is met.

Description

Technical Field

[0001] The utility model relates to the technical field of mining equipment, in particular to an electric control system for a self-moving machine tail. Background Art

[0002] The self-moving tail electric control system is an automatic control system for self-moving tails in coal mines and other environments. It can realize the movement and posture adjustment of the self-moving tail, thereby improving transportation efficiency and safety.

[0003] In the prior art, only emergency and local control terminals are generally set to control the self-moving machine tail to perform corresponding operations. Since both emergency and local control terminals require on-site human control operations, not only does it take a long time for manual assistance and high labor intensity, but the related leveling and deviation adjustment operations are cumbersome and complicated, making it difficult to meet the automated production needs of underground coal mines, and seriously restricting the advancement efficiency of the excavation face. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an electric control system for a self-moving tail, which aims to provide a plurality of control modes for operating the self-moving tail, and can switch between control modes safely and conveniently, so as to meet the automated production needs of underground coal mines.

[0005] The utility model provides an electric control system for a self-moving machine tail, which is applied to a self-moving machine tail. The self-moving machine tail includes a hydraulic pump. The electric control system for the self-moving machine tail includes: a local control unit, a remote terminal, and a switching control unit. The local control unit is used to generate different enable signals, wherein the enable signal includes a first enable signal for remote control start, a second enable signal for remote control disconnection, and a third enable signal for switching an operation control mode; the remote terminal is communicatively connected with the local control unit, and the remote terminal is used to generate different trigger signals. Under the action of the trigger signal, the local control unit generates a first enable signal and a second enable signal; the switching control unit is used to remotely control disconnection, remote control start, and switch the operation control mode of a control circuit of the hydraulic pump according to the first enable signal, the second enable signal, and the third enable signal, wherein the operation control mode includes a manual operation mode, a remote operation mode, and an emergency operation mode.

[0006] The beneficial effects of the present utility model include at least: through the local control unit and the remote terminal, the local control unit can send a corresponding enable signal to execute different control operations on the switching control unit, thereby realizing the switching control of the manual operation mode, remote operation mode and emergency operation mode of the hydraulic pump. The whole process does not require much personnel intervention, which improves the level of automation of operation and meets the needs of automated production in underground coal mines. At the same time, the whole control logic is simple and the complexity of operation is reduced.

[0007] In addition, the above-mentioned electric control system for self-moving tail of the utility model can also have the following additional technical features:

[0008] Furthermore, the switching control unit includes a first switching switch, a second switching switch, a third switching switch, a first controller, a second controller and a third controller. The first switching switch is used to form a first control loop with the third switching switch and the first controller under the action of a third enable signal. The first control loop starts the control loop of the hydraulic pump under the action of the first enable signal, and forms a second control loop with the third switching switch and the second controller under the action of the third enable signal. The second control loop disconnects and opens the control loop of the hydraulic pump under the action of the second enable signal; the second switching switch is used to form a third control loop with the third switching switch and the third controller under the action of the third enable signal. The third control loop starts the control loop of the hydraulic pump under manual triggering; the third switching switch disconnects the first control loop and the second control loop under the action of the third enable signal.

[0009] Furthermore, the local control unit includes a controller, a first contactor, a second contactor and a third contactor electrically connected to the controller, the first switching switch is a normally open contact switch in which the first contactor is connected in series in the first control circuit, the second switching switch is a normally open contact switch in which the second contactor is connected in series in the second control circuit, and the third switching switch is a normally closed contact switch in which the third contactor is connected in series in the first control circuit and the second control circuit.

[0010] Furthermore, the local control unit also includes a fourth contactor and a fifth contactor electrically connected to the controller, the first controller includes a first relay and a normally open contact switch of the fourth contactor connected in series, the second controller includes a second relay and a normally open contact switch of the fourth contactor connected in series, the coil of the first relay is connected in series with the normally open contact switch of the fourth contactor and then connected in series in the first control circuit, the coil of the second relay is connected in series with the normally open contact switch of the fifth contactor and then connected in series in the second control circuit, the control circuit of the hydraulic pump includes a sixth contactor, the normally open contact switch of the first relay, the normally closed contact switch of the second relay, and the coil of the sixth contactor are connected in series, and the series branch is connected in parallel to the series branch between the coil of the first relay and the normally open contact switch of the fourth contactor.

[0011] Furthermore, the normally open contact switch of the sixth contactor is connected in parallel to both ends of the normally open contact switch of the first relay.

[0012] Furthermore, the third controller includes a normally closed switch and a normally open switch, and the normally closed switch and the normally open switch are connected in series in the third control loop.

[0013] Furthermore, both the normally closed switch and the normally open switch are non-self-locking switches, and the normally open contact switch of the sixth contactor is connected in parallel to both ends of the normally open switch.

[0014] Furthermore, a fuse is connected in series on the first control loop.

[0015] Furthermore, a fuse is connected in series on the second control loop.

[0016] Furthermore, the self-moving tail electric control system also includes a thermal relay, which is used to disconnect the first control loop, the second control loop and the third control loop when the temperature exceeds a preset value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the hydraulic control principle of an embodiment of the utility model;

[0018] Figure 2 The wiring diagram of the PLC terminal in the tail of the self-moving machine used in the embodiment of the utility model;

[0019] Figure 3 The wiring diagram of the relay and the solenoid valve in the tail of the self-moving machine used in the embodiment of the utility model;

[0020] Reference numerals:

[0021] Local control unit 100, remote terminal 200;

[0022] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] Reference Figure 2 , Figure 2 This is the wiring diagram of the PLC terminal in the tail of the self-moving machine. Specifically, the upper terminal of the terminal is connected to the positive and negative poles of the control power supply and the output port of the PLC, and the lower terminal of the terminal is connected to the coil of the relay to control the on and off of the relay.

[0028] Reference Figure 3 , Figure 3 This is the wiring diagram of the relay and the solenoid valve in the self-moving machine tail. Specifically, one end of the normally open contact switch of the relay is connected to the positive pole of the power supply, and the other end is connected to the solenoid valve to control the corresponding solenoid valve to perform corresponding actions, so that the corresponding hydraulic actuator of the self-moving machine tail is actuated, for example, the leveling hydraulic cylinder is actuated, and the moving hydraulic cylinder is actuated.

[0029] The electronic control system of the tail of the self-moving machine in the present application is used to control the start and stop of the hydraulic pump in the tail of the self-moving machine, so that when the hydraulic pump is working, the hydraulic pressure can act on the hydraulic actuator only after the corresponding solenoid valve is actuated. Specifically, the electronic control system of the tail of the self-moving machine includes: a local control unit, a remote terminal, and a switching control unit. The local control unit is used to generate different enable signals, wherein the enable signal includes a first enable signal for remote control opening, a second enable signal for remote control disconnection, and a third enable signal for switching the operation control mode; the remote terminal is communicatively connected with the local control unit, and the remote terminal is used to generate different trigger signals. Under the action of the trigger signal, the local control unit generates a first enable signal and a second enable signal; the switching control unit is used to remotely control the control circuit of the hydraulic pump to disconnect, remotely control, and switch the operation control mode according to the first enable signal, the second enable signal, and the third enable signal, wherein the operation control mode includes a manual operation mode, a remote operation mode, and an emergency operation mode.

[0030] Reference Figure 1 , Figure 1The schematic diagram of a specific embodiment of the electric control system for the tail of the self-moving machine in this application includes a local control unit 100, a remote terminal 200, a contactor KM1, a contactor KM2, a contactor KM3, a contactor KM4, a contactor KM5, a relay KA1, a relay KA2, a normally closed switch SB2 and a normally open switch SB1, and the control circuit of the hydraulic pump includes a contactor KM6. The local control unit 100 and the remote terminal 200 are connected by communication, for example, by RS485 protocol, or by wireless network, so that data can be exchanged between the two. Both the local control unit 100 and the remote terminal 200 can adopt a microcontroller with autonomous control function, such as a PLC controller, and the local control unit 100 controls the power on and power off of the coils of the contactors KM1, KM2, KM3, KM4 and KM5, so as to open and disconnect their contact switches (KM1-1, KM2-1, KM3-1, KM4-1, KM5-1).

[0031] When connecting these devices specifically, the coils of the normally open contact switch KM1-1, the normally open contact switch KM3-1, the normally open contact switch KM4-1, and the relay KA2 are connected in series, and one end of the series branch is connected to the positive pole of the control power supply, and the other end of the series branch is connected to the negative pole of the control power supply; the coils of the normally open contact switch KM1-1, the normally closed contact switch KM3-1, the normally open contact switch KM5-1, and the relay KA1 are connected in series, and one end of the series branch is connected to the positive pole of the control power supply, and the other end of the series branch is connected to the negative pole of the control power supply; the coil of the contactor KM6, the normally open contact switch KA1-1 of the relay KA1, and the normally closed contact switch KA2-1 of the relay KA1 are connected in series, and the series branch is connected in parallel to the series branch of the normally open contact switch KM5-1 and the coil of the relay KA1, and in parallel to the series branch of the normally open contact switch KM4-1 and the coil of the relay KA2. Furthermore, the normally open contact switch KM6-1 of the contactor KM6 is connected in parallel to both ends of the normally open contact switch KA1-1.

[0032] In addition, the coils of the normally open contact switch KM2-1, the normally closed contact switch KM3-2, the normally closed switch SB2, the normally open switch SB1, and the contactor KM6 are connected in series, and one end of the series branch is connected to the positive electrode of the control power supply, and the other end of the series branch is connected to the negative electrode of the control power supply. Furthermore, the normally closed switch SB2 and the normally open switch SB2 are both non-self-locking switches, and the normally open contact switch KM6-2 of the contactor KM6 is connected in parallel to both ends of the normally open switch SB1.

[0033] When remote operation is required, the remote terminal 200 sends the corresponding data to the local control unit 100. After receiving the data, the local control unit 100 puts the coil of the contactor KM1 in the energized state, and the normally open contact switch KM1-1 is closed. Afterwards, the remote terminal 200 sends the corresponding opening instruction to the local control unit 100. After receiving the instruction, the local control unit 100 puts the coil of the contactor KM5 in the energized state, and the normally open contact switch KM5-1 is closed, and the coil of the relay KA1 is energized, and then the coil of the contactor KM6 is energized, so that the hydraulic pump starts to work. At this time, since the normally open contact switch KM6-1 of the contactor KM6 is closed, the contactor KM6 is self-locked. Afterwards, the corresponding solenoid valve action can be controlled by the local control unit. When the hydraulic pump needs to stop working, the remote terminal 200 sends the corresponding stop command to the local control unit 100. After receiving the command, the local control unit 100 puts the coil of contactor KM4 in the energized state, and at the same time puts the coil of contactor KM5 in the de-energized state. At this time, the normally open contact switch KM5-1 is disconnected, the normally open contact switch KM4-1 is energized, the coil of relay KA2 is energized, and the normally closed contact switch KA2-1 of relay KA2 is disconnected, thereby de-energizing the coil of contactor KM6, causing the hydraulic pump to stop working.

[0034] When manual operation is required on site, the local control unit 100 puts the coil of the contactor KM1 in a de-energized state, so that the normally open contact switch KM1-1 is always in an open state, and the remote operation does not work at this time. At the same time, the local control unit 100 puts the coil of the contactor KM2 in an energized state, so that the normally open contact switch KM2-1 is in a closed state. At this time, the normally open switch SB1 is in a closed state, so that the coil of the contactor KM6 can be energized, so that the hydraulic pump starts working. Moreover, at this time, since the normally open contact switch KM6-6 of the contactor KM6 is also in a closed state, the contactor KM6 is self-locked. In addition, by putting the normally closed switch SB2 in an open state, the coil of the contactor KM6 can be de-energized, thereby stopping the hydraulic pump.

[0035] When encountering an emergency, the hydraulic pump needs to be stopped immediately. At this time, the coil of contactor KM3 can be placed in an energized state through the local control unit 100, so that the normally closed contact switch KM3-1 and the normally closed contact switch KM3-1 are in a disconnected state. At this time, no matter how the operation is performed, the coil of contactor KM6 cannot be energized, thereby achieving the goal of always keeping the hydraulic pump in a stopped state.

[0036] In some optional embodiments, such as Figure 1As shown, in order to prevent current overload or short circuit, a fuse is provided on the series branch of the coil of the normally open contact switch KM1-1, the normally open contact switch KM3-1, the normally open contact switch KM4-1, and the relay KA2, a fuse is provided on the series branch of the coil of the normally open contact switch KM1-1, the normally closed contact switch KM3-1, the normally open contact switch KM5-1, and the relay KA1, and a fuse is provided on the series branch of the coil of the normally open contact switch KM2-1, the normally closed contact switch KM3-2, the normally closed switch SB2, the normally open switch SB1, and the contactor KM6. Optionally, a fuse FU1 is connected in series between the normally open contact switch KM1-1 and the normally closed contact switch KM3-1, and a fuse FU2 is connected in series between the normally open contact switch KM2-1 and the normally closed contact switch KM3-2.

[0037] In some optional embodiments, such as Figure 1 As shown, in order to prevent current overload or short circuit, a thermal relay is provided on the series branch of the coils of the normally open contact switch KM1-1, the normally open contact switch KM3-1, the normally open contact switch KM4-1, and the relay KA2, a thermal relay is provided on the series branch of the coils of the normally open contact switch KM1-1, the normally closed contact switch KM3-1, the normally open contact switch KM5-1, and the relay KA1, and a thermal relay is provided on the series branch of the coils of the normally open contact switch KM2-1, the normally closed contact switch KM3-2, the normally closed switch SB2, the normally open switch SB1, and the contactor KM6. Optionally, a thermal relay FR is connected in series between the common connection point of the coils of the relay KA1, the relay KA2, and the contactor KM6 and the negative pole of the control power supply.

[0038] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An electric control system for a self-moving tail, applied to a self-moving tail, wherein the self-moving tail comprises a hydraulic pump, characterized in that: The self-moving tail electric control system comprises: A local control unit, configured to generate different enable signals, the enable signals including a first enable signal for remote control on, a second enable signal for remote control off, and a third enable signal for switching an operation control mode; a remote terminal, which is in communication with the local control unit, and the remote terminal is used to generate different trigger signals, and the local control unit generates the first enable signal and the second enable signal under the action of the trigger signals; A switching control unit is used to remotely control disconnection, remote control activation and switching of the operation control mode of the control circuit of the hydraulic pump according to the first enable signal, the second enable signal and the third enable signal, wherein the operation control mode includes a manual operation mode, a remote operation mode and an emergency operation mode.

2. The self-moving tail electric control system according to claim 1, characterized in that: The switching control unit includes a first switching switch, a second switching switch, a third switching switch, a first controller, a second controller and a third controller. The first switching switch is used to form a first control circuit with the third switching switch and the first controller under the action of the third enable signal. The first control circuit starts the control circuit of the hydraulic pump under the action of the first enable signal, and forms a second control circuit with the third switching switch and the second controller under the action of the third enable signal. The second control circuit disconnects and opens the control circuit of the hydraulic pump under the action of the second enable signal; the second switching switch is used to form a third control circuit with the third switching switch and the third controller under the action of the third enable signal, and the third control circuit starts the control circuit of the hydraulic pump under manual triggering; the third switching switch disconnects the first control circuit and the second control circuit under the action of the third enable signal.

3. The electric control system for the self-moving tail of the machine according to claim 2, characterized in that: The local control unit includes a controller, a first contactor electrically connected to the controller, a second contactor and a third contactor, the first switching switch is a normally open contact switch in which the first contactor is connected in series with the first control circuit, the second switching switch is a normally open contact switch in which the second contactor is connected in series with the second control circuit, and the third switching switch is a normally closed contact switch in which the third contactor is connected in series with the first control circuit and the second control circuit.

4. The electric control system for the self-moving tail of the machine according to claim 3, characterized in that: The local control unit also includes a fourth contactor and a fifth contactor electrically connected to the controller, the first controller includes a first relay connected in series and a normally open contact switch of the fourth contactor, the second controller includes a second relay connected in series and a normally open contact switch of the fourth contactor, the coil of the first relay is connected in series with the normally open contact switch of the fourth contactor and then connected in series in the first control circuit, the coil of the second relay is connected in series with the normally open contact switch of the fifth contactor and then connected in series in the second control circuit, the control circuit of the hydraulic pump includes a sixth contactor, the normally open contact switch of the first relay, the normally closed contact switch of the second relay, and the coil of the sixth contactor are connected in series, and the series branch is connected in parallel to the series branch between the coil of the first relay and the normally open contact switch of the fourth contactor.

5. The electric control system for the self-moving tail of the machine according to claim 4, characterized in that: The normally open contact switch of the sixth contactor is connected in parallel to both ends of the normally open contact switch of the first relay.

6. The electric control system for the self-moving tail of the machine according to claim 4, characterized in that: The third controller includes a normally closed switch and a normally open switch. The normally closed switch and the normally open switch are connected in series in the third control loop.

7. The electric control system for the self-moving tail of the machine according to claim 6, characterized in that: The normally closed switch and the normally open switch are both non-self-locking switches, and the normally open contact switch of the sixth contactor is connected in parallel to both ends of the normally open switch.

8. The electric control system for the self-moving tail of the machine according to claim 2, characterized in that: A fuse is connected in series to the first control loop.

9. The electric control system for the self-moving tail of the machine according to claim 2, characterized in that: A fuse is connected in series to the second control loop.

10. The electric control system for the self-moving tail of the machine according to claim 2, characterized in that: The self-moving tail electric control system also includes a thermal relay, which is used to disconnect the first control loop, the second control loop and the third control loop when the temperature exceeds a preset value.

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