CN207111085U - A kind of loop control system of development machine eight - Google Patents

Abstract

The utility model discloses an eight-circuit control system of a roadheader, which belongs to the field of electric systems of the roadheader. An eight-loop control system for a roadheader of the utility model includes an electric control box, which is provided with a control transformer, an intrinsically safe power supply, a PLC and a module, and the control transformer is connected to the PLC and the module through the intrinsically safe power supply; the exterior of the electric control box An external device 1 is provided, and the external device 1 includes an operation box, a sensor and a pressure transmitter, and the operation box, sensors and pressure transmitters are respectively connected with the PLC and the module; the operation box includes a box body, a switch module and a display module, and the switch The module communicates with the PLC and the module through the free port protocol, and the display module communicates with the PLC and the module through the MPI communication protocol; there is also an external device 2 outside the electric control box, and the external device 2 includes a dust removal fan, a bolter, a spare motor 1, There are eight second-class motors for standby motors, and the above-mentioned motors are also connected to the PLC and the module respectively. The eight-loop control system of the utility model has high tunneling efficiency and high safety.

Description

A roadheader eight-loop control system

technical field

The utility model relates to a roadheader control system, in particular to an eight-loop control system for a roadheader.

Background technique

With the continuous improvement of the level of economic development and people's quality of life, the electricity demand of enterprises, institutions and residents has also increased. However, the main power generation method in my country is coal thermal power generation, so the demand for coal has also increased. The key technology to ensure stable and high production in coal mines is mining technology, and advanced and efficient mechanized excavation technology is the development direction of roadway excavation technology, and it is also a necessary condition for the coal mining industry to achieve high production and high efficiency. As the product of today's mechanized tunneling technology, the roadheader is advanced or not greatly affects the amount of coal mining, and the advanced roadheader must be inseparable from a good control system. In the roadheader control system, the electric control box and the operation box are necessary. indispensable component. At present, most of the electrical control boxes for roadheaders used in various types of domestic roadheaders use four circuits, that is, the power supply circuits for the oil pump motor, cutting high and low speed motors, and the secondary transport motor, and most of the electric control boxes use dual voltages. , There are also a small number of companies that have developed five circuits, that is, on the basis of four circuits, adding a dust removal fan or a bolter circuit, but the above electric control boxes are unable to drive the roadheader, lift and rotate the cutting arm, lift the rear support, shovel Plate lifting, cutting coal and rock, dust removal, and bolt support are all integrated in one body, that is, the various actions of roadway excavation cannot be controlled and operated by an electric control box for a roadheader. At the same time, the need for power supply circuits for dust removal and bolt motor The cables are laid separately, which increases the cost of excavation and prolongs the excavation cycle of the roadway. In addition, at present, there is no motor circuit for equipment in the electric control box for domestic roadheaders. During the excavation process, if a circuit cannot be started and the on-site technicians cannot determine the cause, they can only stop for repairs, which greatly affects the excavation progress, prolongs the excavation period, and reduces production efficiency. In addition, the lights for roadheaders are generally on after the system is powered on, but in actual use, the staff often cannot observe the working conditions of the mining face or roadway because the lights are too strong, resulting in accidents and affecting Excavation process.

In addition, during the excavation process, the internal bearings of the cutting arm will generate a lot of heat, the temperature of the gear oil in the gearbox will also increase, and the viscosity of the gear oil will also decrease, which will easily cause leakage and cause insufficient pressure in the cylinder , affecting the production schedule. When the temperature of the bearing is too high, the bearing is easily damaged, resulting in high maintenance cost and long replacement time.

At the same time, most of the operation boxes currently used by roadheaders have a certain degree of defects, such as poor man-machine dialogue functions and poor real-time performance. In order to meet market needs, roadheaders need a low-cost, high-reliability, real-time An intelligent operation box that is easy to use and maintain.

Contents of the invention

1. The technical problems to be solved by the utility model

Aiming at the above-mentioned problems in the control system of the roadheader in the prior art, the utility model provides an eight-loop control system for the roadheader. The control system is equipped with eight loops, which can improve the excavation efficiency and ensure the progress of the excavation, and the control system reduces The damage of key components is reduced, the maintenance time of the machine is reduced, and the production progress is guaranteed. At the same time, the control system can control the front and rear lighting lights to be turned on and off separately, avoiding the failure of the working conditions of the mining face or roadway due to the strong light of the lighting lights. It can cause accidents and has high safety. In addition, the operation box of the control system has high reliability, strong real-time performance, and is economical and practical.

2. Technical solution

In order to achieve the above object, the technical solution provided by the utility model is:

The utility model relates to an eight-loop control system for a roadheader, comprising an electric control box. The electric control box is provided with a control transformer, an intrinsically safe power supply, a PLC and a module. The control transformer is connected to the PLC and the PLC through the intrinsically safe power supply. module; the outside of the electric control box is provided with an external device one, and the external device one includes an operation box, a sensor and a pressure transmitter, and the operation box, the sensor and the pressure transmitter are connected to the PLC and the module respectively , for inputting signals to the PLC and the module; the operation box includes a box body, a switch module and a display module, the switch module and the display module are installed on the box body, and the switch module communicates with the PLC through the free port protocol Communication with the module and the signal sent by the switch module is sent to the PLC and the module through the RS-485 interface, and the display module uses the MPI communication protocol to communicate with the PLC and the module to display the operating parameter status of the roadheader; the electronic control The outside of the box is also provided with an external device two, and the external device two includes an oil pump motor, a height-cut motor, a low-cut motor, a second transport motor, a dust removal fan, a bolter, a spare motor one and a spare motor two, and the oil pump The motor, height cut motor, cut down motor, second movement motor, dust removal fan, bolter, spare motor 1 and spare motor 2 are respectively connected with PLC and module, used to receive and execute PLC and module instructions, and send to PLC and The modules feed back their respective working status signals.

Furthermore, the switch module includes 12 switch control keys, and the 12 switch control keys include 10 double-throw self-reset switches, 1 single-throw self-reset switch and 1 self-locking reset switch.

Furthermore, the box body of the operation box is made of stainless steel.

Furthermore, the second external device also includes a front light and a rear light, and the front light and the rear light are respectively connected to the PLC and the module.

Furthermore, the front light is connected to the PLC and the module through the first intermediate relay, and the rear light is connected to the PLC and the module through the second intermediate relay.

Furthermore, the sensor includes a first oil temperature sensor and a second oil temperature sensor, the first oil temperature sensor is connected to the PLC and the module through the first safety isolation barrier, and the second oil temperature sensor is connected to the The second safety isolation barrier is connected with the PLC and the module.

3. Beneficial effect

Adopting the technical solution provided by the utility model, compared with the existing known technology, has the following beneficial effects:

(1) An eight-circuit control system for a roadheader of the present utility model includes an electric control box, which is provided with eight circuits. The motor is powered, and it can also supply power to the dust removal fan and the bolter. It is not necessary to separately supply power to the dust removal fan and the bolter, which improves the excavation efficiency.

(2) An eight-circuit control system for a roadheader of the present utility model. An operation box is provided in the control system. The operation box is provided with a switch module and a display module. The switch module communicates with the PLC and the module through the free port protocol, and the display module Using MPI communication protocol to communicate with PLC and modules, it has stable performance, high reliability, strong real-time performance, and strong human-computer interaction ability. At the same time, the operation box has simple structure, low cost and convenient operation.

(3) An eight-circuit control system for a roadheader according to the utility model, the operation box body is made of stainless steel, and the box body has good corrosion resistance, which effectively prolongs the service life of the operation box.

(4) In the eight-circuit control system of the roadheader of the present utility model, the front and rear lights can be switched on and off separately, which avoids accidents caused by the fact that the lights are too strong to observe the working conditions of the mining face or roadway, and the safety is higher .

(5) The eight-circuit control system of the roadheader of the utility model can monitor the oil temperature and oil level in real time. When the oil temperature and oil level exceed the standard, the system will automatically shut down, reducing the damage of key components and reducing maintenance costs.

Description of drawings

Fig. 1 is a kind of roadheader eight circuit control system electric principle block diagram of the utility model;

Fig. 2 is the operating box structural diagram in the utility model;

Fig. 3 is the on-off schematic diagram of the front and rear lighting lamps in the utility model;

Fig. 4 is a diagram of the oil temperature and oil level protection system in the utility model;

Fig. 5 is the start-up flowchart of the oil pump motor in the utility model;

Fig. 6 is the start-up flowchart of the cutting height motor in the utility model;

Fig. 7 is the start-up flowchart of the cut-off motor in the utility model;

Fig. 8 is the start-up flowchart of the second motor in the utility model;

Fig. 9 is the start-up flowchart of the dedusting fan in the utility model;

Fig. 10 is the start-up flowchart of the rock bolter in the utility model;

Fig. 11 is a flow chart of starting a motor in the utility model;

Fig. 12 is a flow chart of starting the second motor in the utility model.

Explanation of the labels in the schematic diagram:

1. External device one; 2. External device two; 3. Electric control box; 11. Operation box; 12. First oil temperature sensor; 13. Second oil temperature sensor; 14. Pressure transmitter; 15. First Safety barrier; 16. Second safety barrier; 17. Third safety barrier; 21. Front lighting; 22. Rear lighting; 23. First intermediate relay; 24. Second intermediate relay; 31. Control transformer ; 32, intrinsically safe power supply; 33, PLC and modules; 111, cabinet; 112, switch module; 113, display module.

Detailed ways

In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

Example

As shown in Fig. 1 and Fig. 2, a kind of roadheader eight-loop control system of the present embodiment includes an electric control box 3, and the electric control box 3 is provided with a control transformer 31, an intrinsically safe power supply 32, a PLC and a module 33, Wherein, the control transformer 31 is connected to the PLC and the module 33 through the intrinsically safe power supply 32 . In addition, an external device 1 is provided outside the electric control box 3, and the external device 1 includes an operation box 11, a sensor and a pressure transmitter 14, and the operation box 11, sensors and pressure transmitter 14 are respectively connected to the PLC and the module 33 Connected for inputting signals to PLC and module 33. It should be noted that the above-mentioned operation box 11 includes a box body 111, a switch module 112 and a display module 113. The switch module 112 and the display module 113 are installed on the box body 111, and the switch module 112 communicates with the PLC and the module through the free port protocol. 33 communicates and the signal sent by the switch module 112 is sent to the PLC and the module 33 through the RS-485 interface. At the same time, the display module 113 communicates with the PLC and the module 33 using the MPI communication protocol to display the operating parameter status of the roadheader. In addition, the electric control box 3 is also equipped with an external device 2 2, which includes an oil pump motor, a height cut motor, a cut down motor, a second transport motor, a dust removal fan, a bolter, a backup motor 1 and a backup motor 2 , and the oil pump motor, the height cut motor, the cut down motor, the second movement motor, the dust removal fan, the bolter, the backup motor 1 and the backup motor 2 are connected to the PLC and the module 33 respectively, and are used to receive and execute the instructions of the PLC and the module 33 , and feed back their respective working status signals to the PLC and the module 33. Specifically, the PLC mentioned here and the PLC in the module 33 all mean programmable controllers. Among them, the oil pump motor, the height cut motor and the cut motor feed back their temperature information to the PLC and the module 33 through the sensors, and the PLC and the module 33 make corresponding judgments and send instructions to the oil pump motor, the height cut motor and the cut motor. At the same time, the oil pump motor, the height cut motor, the cut down motor, the second movement motor, the dust removal fan, the bolter, the spare motor 1 and the spare motor 2 feed back the leakage blocking information to the PLC and the module 33 through the leakage protector, and the PLC and the module 33 according to The feedback information issues corresponding instructions. In addition, the eight-loop control system of this embodiment is also equipped with a current transformer, and the above-mentioned eight motors such as the oil pump motor also feed back current signals to the PLC and the module 33 through the current transformer. At the same time, the above-mentioned feedback information is also fed back to the operation box 11 via the PLC and the module 33, and displayed on the display module 113 of the operation box 11. The operator can operate through the switch module 112 and the display module 113 according to the feedback information. , its operation information is sent by the operation box 11 to the PLC and the module 33 to operate.

More specifically, as shown in FIG. 1 and FIG. 2, the above-mentioned display module 113 is located in the middle of the front panel of the box body 111, and the switch module 112 is arranged around the periphery of the display module 113, and the switch module 112 includes 12 switch control 12 switch control keys including 10 double-throw self-reset switches, 1 single-throw self-reset switch and 1 self-locking reset switch, among which, 10 double-throw self-reset switches include oil pump, cutting high speed, cutting low speed , second operation, fan, drilling rig, backup 1, backup 2, information up/down and exit/reset, 1 single-throw self-reset switch is the power button, and 1 self-locking reset button switch is the emergency stop button. When a certain switch button in the switch module 112 is pressed, the switch button sends a signal and sends corresponding data values to the PLC in the electric control box 3 and the module 33 through the communication cable, and the PLC and the module 33 carry out after receiving the data value. Judgment and send the corresponding action signal to control the motor to start and stop. After the motor operates, the PLC and the module 33 send the operating state value or fault state value of the motor to the operation box 11 according to its real-time operation, and the operation box 11 displays the corresponding screen on the man-machine interface of the display module 113 after receiving the corresponding value , Preferably, the man-machine interface of this embodiment adopts Weikong Technology KC01-43T man-machine interface, the man-machine interface has a clear picture and is easy to use. If there is a misoperation during operation, the program in the controller PLC will process it, ignore the misoperation, the motor will not act, and the display of the operation box 11 will not change. In the running state, if the roadheader breaks down, the PLC and module 33 in the electric control box 3 collect the corresponding fault signal and send it to the operation box 11, and the display module 113 of the operation box 11 displays a fault screen to remind the operator to check and eliminate the fault . If the user wishes to check the running information of the roadheader, he operates the up/down switch on the operation box 11, and the operation box 11 sends corresponding data values to the PLC and the module 33 in the electric control box 3 through the communication cable, and the PLC and the module 33 send corresponding data values. After the module 33 receives the data value, it judges, then collects the data and returns the collected data to the operation box 11, and displays the running information on the display screen of the display module 113; various information, press the exit key to return to the running status screen. In addition, the box body 111 of the above-mentioned operation box 11 is made of stainless steel, and the box body 111 has good corrosion resistance, which effectively prolongs the service life of the operation box 11. At the same time, the box body 111 is provided with a communication cable interface, a switch The signal of the module 112 is output by the RS485 interface in the communication cable interface. In addition, both the switch module 112 and the display module 113 are connected to an intrinsically safe power supply, and the switch module 112 is powered by converting the intrinsically safe power supply from 24V to 5V. The operation box 11 has stable performance, high reliability, strong real-time performance, and strong human-computer interaction capability. At the same time, the operation box has simple structure, low cost and convenient operation.

Further, as shown in FIG. 1 and FIG. 3 , the above-mentioned external device 2 also includes a front lighting lamp 21 and a rear lighting lamp 22, and the front lighting lamp 21 and the rear lighting lamp 22 are respectively connected to the PLC and the module 33, specifically , as shown in Figure 3, the front lighting lamp 21 is connected with the PLC and the module 33 through the first intermediate relay 23, the rear lighting lamp 22 is connected with the PLC and the module 33 through the second intermediate relay 24, and the PLC and the module 33 are connected with the operation box 11 connection, there are two buttons in the operation box 11, respectively representing the front light switch and the rear light switch, when the front light switch/rear light switch is pressed, the operation box 11 sends its switch signal through the free port protocol For PLC and module 33, PLC and module 33 control output through internal program, control the coil of first intermediate relay 23/second intermediate relay 24 to turn on, and then through the auxiliary normally open contact of first intermediate relay 23/second intermediate relay 24 Point control front light 21/rear light 22 are always on. Similarly, when the front/rear light switch is pressed again, the auxiliary contacts of the first intermediate relay 23/second intermediate relay 24 are disconnected, and the front light 21/rear light 22 are extinguished. Wherein, preferably, in this embodiment, the model of the PLC in the PLC and the module 33 is S7-300, and the above-mentioned first intermediate relay 23 and second intermediate relay 24 are connected to the PLC of the model S7-300. The front and rear lighting lamps in this embodiment can be switched on and off independently, which avoids accidents caused by the fact that the lighting lamps are too strong to observe the working conditions of the mining face or roadway, and the safety is higher.

Furthermore, as shown in FIG. 1 and FIG. 4 , the aforementioned sensors include a first oil temperature sensor 12 , a second oil temperature sensor 13 and a gas sensor, wherein the first oil temperature sensor 12 communicates with the gas sensor through the first safety isolation barrier 15 . The PLC is connected to the module 33, and the second oil temperature sensor 13 is connected to the PLC and the module 33 through the second safety barrier 16. As a preferred solution, the model of the analog input module in the PLC and the module 33 is SM331. Install the first oil temperature sensor 12 near the oil outlet at the bottom of the fuel tank, the first oil temperature sensor 12 converts the temperature signal into a resistance signal, and through the first safety isolation barrier 15, the resistance signal is converted into a 4-20mA standard current signal, and finally It is input into the analog input module of model SM331 and controlled by the internal program of PLC of model S7-300. When the oil temperature of the oil tank reaches 75°C, the system stops and the oil pump motor cannot run, so as to avoid damage to the hydraulic components and delay the excavation process. When the temperature drops to 70°C, the oil pump motor can start normally. At the same time, a second oil temperature sensor 13 is installed at the oil filler port on the upper side of the gearbox to detect the oil temperature of the gear oil in the gearbox. Its working principle is the same as that of the first oil temperature sensor 12 in the oil tank. Signal, the resistance signal is converted into a standard current signal of 4-20mA through the second safety isolation barrier 16, and finally input into the analog input module of model SM331, controlled by the internal program of PLC of model S7-300, when the gear box When the oil temperature of the internal gear oil reaches 75°C, the cut-up motor and the cut-down motor stop running, and when the temperature drops to 70°C, the cut-up motor and the cut-down motor can start normally. In addition, a pressure transmitter 14 is also installed near the oil outlet at the bottom of the fuel tank. The pressure transmitter 14 is connected with the PLC and the module 33 through the third safety isolation barrier 17. The pressure transmitter 14 converts the oil pressure signal into The current signal is converted into a 4-20mA standard current signal through the third safety isolation barrier 17, and is also input into the analog input module of the model SM331, controlled by the PLC internal program of the model S7-300, when the hydraulic oil in the oil tank When the height is lower than half of the height of the fuel tank, the system shuts down and the oil pump motor cannot run. Only when hydraulic oil is added to make the oil level exceed half of the height of the fuel tank, the system is unlocked and the oil pump motor can start. The oil temperature and oil level real-time protection system reduces damage to key components and reduces maintenance costs.

In order to better understand the eight-loop control system of the roadheader in this embodiment, the start-up process of each motor in this embodiment will be briefly described in conjunction with FIGS. 5 to 12 . The faults that can be detected by the eight-loop control system of the roadheader in this embodiment include high oil temperature in the fuel tank, low oil level, high oil temperature in the gear box, gas lockout, total emergency stop, cutting emergency stop, and various motor failures. Over temperature, over current, overload, phase failure and leakage. When the motor is faulty, the corresponding motor cannot start. When the total emergency stop and gas lockout, the oil temperature of the fuel tank is too high, and the oil level is too low, all the motors cannot run. When the cutting emergency stop and the gear oil temperature of the gearbox are too high When it is high, the height cut motor and the cut motor cannot be started. When all the motors are not replaced, only after the oil pump motor starts, the rest of the motors can be started. Among them, the oil pump motor, the high cut motor, the low cut motor, the backup first motor and the backup second motor can only be started after the alarm bell is issued. The motor, cut down motor and rod bolter are interlocked. When the oil pump motor is replaced, it can only be replaced with the backup motor, and the height cut motor and the cut down motor cannot be replaced. At this time, only after the backup motor starts, the rest of the motors can start normally. Interlock with rock bolter. When the cut-off motor/cut-down motor is replaced, it can only be replaced with the backup motor. At this time, the cut-down motor/cut-height motor, the bolter and the backup motor are interlocked. Motors other than the clip motors/cut motors need to be activated. When the second motor/dust removal fan is replaced, it can only be replaced to the second one, start the oil pump motor first, and then start other motors except the second motor/dust removal fan according to actual needs. When the motor of the bolter is replaced, it can only be replaced with the second motor. At this time, the height cut motor, the lower motor and the second motor are interlocked. After the oil pump motor is started, the bolt removal motor is started according to actual needs. other motors. This embodiment adds two backup circuits, one is a large current backup motor circuit, and the other is a small current backup motor circuit. When it cannot be started, the spare motor circuit can be used to replace the faulty motor circuit, without stopping for maintenance, which improves the work efficiency and ensures the progress of the excavation. At the same time, the backup motor circuit can also be used as a common circuit. During the excavation process, when it is necessary to use a device with a power supply voltage of 1140V/660V, it can be powered by the backup circuit, which is very convenient.

The eight-circuit control system of the roadheader of the utility model integrates the control of the roadheader walking, the lifting and turning of the cutting arm, the lifting and lowering of the rear support, the lifting of the shovel plate, cutting coal and rock, dust removal, and bolt support, and has multiple functions. , high excavation efficiency, low maintenance cost and high safety in use.

The above has schematically described the utility model and its implementation, which is not restrictive, and what is shown in the drawings is only one of the implementation of the utility model, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired by it, without departing from the purpose of the utility model, without creatively designing a structural method and embodiment similar to the technical solution, all should belong to the utility model protected range.

Claims (6)

1. a kind of loop control system of development machine eight, including electric cabinet (3), it is characterised in that：It is provided with described electric cabinet (3) Control transformer (31), intrinsic safety electric source (32) and PLC and module (33), described control transformer (31) pass through intrinsic safety electric source (32) PLC and module (33) are connected；External equipment one (1), described external equipment one are provided with outside described electric cabinet (3) (1) control box (11), sensor and pressure transmitter (14), described control box (11), sensor and pressure transmitter are included (14) it is connected respectively with PLC and module (33), for PLC and module (33) input signal；Described control box (11) includes Casing (111), switch module (112) and display module (113), described switch module (112) and display module (113) installation On casing (111), described switch module (112) passes through Free agreement and PLC and module (33) communication and switch module (112) signal sent is sent to PLC and module (33) by RS-485 interfaces, and described display module (113) is led to using MPI Interrogate agreement to communicate with PLC and module (33), to show the operational factor state of development machine；Outside described electric cabinet (3) also Provided with external equipment two (2), described external equipment two (2) include Oil pump electrical machinery, cut high motor, cut low motor, two fortune motors, Dedusting fan, jumbolter, standby motor one and standby motor two, described Oil pump electrical machinery, cut high motor, cut low motor, two Fortune motor, dedusting fan, jumbolter, standby motor one and standby motor two are connected with PLC and module (33) respectively, for connecing The instruction of PLC and module (33) is received and performed, and respective working state signal is fed back to PLC and module (33).

A kind of 2. loop control system of development machine eight according to claim 1, it is characterised in that：Described switch module (112) 12 switching control keys are included, the switching control key described in 12 is singly thrown certainly including 10 double-throw self-resetting switch, 1 Reset switch and 1 self-locking reset switch.

A kind of 3. loop control system of development machine eight according to claim 2, it is characterised in that：Described control box (11) Casing (111) be made up of stainless steel material.

A kind of 4. loop control system of development machine eight according to claim 3, it is characterised in that：Described external equipment two (2) also include front lamp (21) and rear lighting lamp (22), described front lamp (21) and rear lighting lamp (22) respectively with PLC And module (33) connection.

A kind of 5. loop control system of development machine eight according to claim 4, it is characterised in that：Described front lamp (21) it is connected by the first auxiliary reclay (23) with PLC and module (33), described rear lighting lamp (22) is by among second Relay (24) is connected with PLC and module (33).

A kind of 6. loop control system of development machine eight according to claim 1 to 5 any one, it is characterised in that：It is described Sensor include the first oil temperature sensor (12) and the second oil temperature sensor (13), described the first oil temperature sensor (12) is logical Cross the first security isolation grid (15) to be connected with PLC and module (33), described the second oil temperature sensor (13) passes through the second safety Isolated gate (16) is connected with PLC and module (33).