Mining flame-proof and intrinsically safe PLC control box

Abstract

The utility model relates to a mining flame-proof and intrinsically safe PLC control box, which comprises a flame-proof main cavity arranged on a base and an intrinsically safe wiring cavity arranged on the right side of the flame-proof main cavity, and a control keyboard, a function knob and a locking switch are arranged on a flame-proof cavity door cover of the flame-proof main cavity. The circuit breaker, the fuse and the filtering module group are all connected to the intrinsic safety power supply and the switching power supply, the fuse and the filtering module group are connected to the output side of the locking switch, the control keyboard is connected to the industrial control screen through a USB connecting line, the function knob is connected to the programmable module group through a control cable, and the industrial control screen and the programmable module group are both provided with communication interfaces. The addressing module is connected to the industrial control screen through the acousto-optic annunciator, and the programmable module group and the industrial control screen are respectively connected to the Ethernet switch through network cables; the PLC control box has the advantages of being convenient to operate, various in communication interface type, high in compatibility, complete in function and capable of reducing the size of the PLC control box, and underground installation and transportation are convenient.

Description

[Technical field]

[0001] The utility model relates to the technical field of a PLC control box for mining, in particular to a flameproof and intrinsically safe PLC control box for mining. [Background Technology]

[0002] The flameproof PLC control box for mining is used in mines with methane mixed gas and coal dust and explosion hazards. As the main on-site equipment of the automated centralized control system, the country continues to strengthen the construction of coal mine production automation, in order to realize the automation, intelligence and informatization of coal mine production as soon as possible. At present, most of the flameproof PLC control boxes for mining on the market have problems such as single function, large size, poor third-party compatibility, lack of intercom function, etc., which makes it inconvenient for users to operate and brings great inconvenience to on-site construction and use and maintenance, which has a great impact on the automation, intelligence and informatization of coal mine production.

[0003] In the prior art, a Chinese patent with the authorization announcement number CN203224744U discloses a mine-use flameproof and intrinsically safe programmable control box. The touch screen arranged in the flameproof chamber door cover can display the dynamic parameter changes, operating conditions and fault alarm information of the equipment; the intrinsically safe power supply and transformer arranged in the flameproof chamber can provide the power required by itself, realize the mutual conversion between intrinsically safe and flameproof signals, and can directly control the flameproof electrical equipment; through the output communication interface, it is easy to access the mine automation system, and can realize mutual communication with the mine intrinsically safe wireless switch to realize centralized control and monitoring of the electromechanical equipment of the comprehensive mining working face.

[0004] However, this type of explosion-proof PLC control box for mines is similar to common PLC control boxes in that it has a large explosion-proof housing, a single communication interface, lacks voice intercom function, and lacks fuse and filter module group functions. This will increase the investment cost for Party A who wants to carry out automation, intelligence, and information construction of coal mine production, and is also a waste of national resources; and the explosion-proof housing is large, which is not conducive to on-site construction wiring and installation and fixation. [Contents of the utility model]

[0005] The purpose of the utility model is to solve the above-mentioned deficiencies and provide a mining explosion-proof and intrinsically safe PLC control box, which has the effects of convenient operation, a variety of communication interfaces, strong compatibility, full functions and reduced size of the PLC control box, and is convenient for underground installation and transportation.

[0006] In order to achieve the above purpose, a mine flameproof and intrinsically safe PLC control box is designed, comprising a flameproof main cavity 1 installed on a base and an intrinsically safe wiring cavity 2 arranged on the right side of the flameproof main cavity 1, wherein a programmable module group 10, an Ethernet switch 11, an addressing module 13, an interface converter 15, a circuit breaker 5, a fuse 6 and a filter module group 7 are arranged inside the flameproof main cavity 1, and a control keyboard 14, a function knob 17 and a locking switch 18 are arranged on the flameproof cavity door cover of the flameproof main cavity 1, the circuit breaker 5, the fuse 6 and the filter module group 7 are all connected to the intrinsically safe power supply 9 and the switching power supply 8, and the fuse 6 and the filter module group 7 are connected to the output side of the locking switch 18, and the control keyboard 14 is connected to the industrial control screen 1 through a USB cable 2, the function knob 17 is connected to the programmable module group 10 through a control cable, the industrial control panel 12 and the programmable module group 10 are both provided with a communication interface, the addressing module 13 is connected to the industrial control panel 12 through an acoustic and optical signal device for communication, and the programmable module group 10 and the industrial control panel 12 are respectively connected to the Ethernet switch 11 through a network cable for data exchange; by adopting the above technical scheme, the width of the PLC control box is shortened, the total weight of the PLC control box is effectively reduced, and the underground installation and transportation are convenient; the fuse and the filter module group are added to effectively filter out high-order harmonics and short-time current impacts, which plays a role in ensuring the stability and reliability of the internal voltage of the PLC control box; the control keyboard is added to make the operation of the industrial control panel more convenient.

[0007] Furthermore, the programmable module group 10, Ethernet switch 11, industrial control panel 12, and interface converter 15 are respectively connected to the switching power supply 8 and powered by the switching power supply 8, and the addressing module 13 is connected to the intrinsically safe power supply 9 and powered by the intrinsically safe power supply 9, thereby ensuring the quality and reliability of power supply to electronic devices in the cabinet.

[0008] Furthermore, a cable introduction device 3 and a waterproof connector 4 are provided on the right side of the intrinsically safe wiring cavity 2, and the power input terminal in the flameproof main cavity 1 is connected to the external power supply through the cable introduction device 3, which can ensure that the transmission of various signals is effectively separated and does not interfere with each other.

[0009] Furthermore, the external signal is connected to the double-layer wiring block 19 in the intrinsically safe wiring cavity 2 via the waterproof connector 4, the cables on the double-layer wiring block 19 are connected to the flameproof main cavity 1 via the flameproof wall terminal 20, and the external network cable and optical fiber are connected to the Ethernet switch 11 in the flameproof main cavity 1 via the flameproof wall terminal 20, thereby ensuring that the transmission of various types of signals are effectively separated and do not interfere with each other.

[0010] Furthermore, the addressing module 13 transmits the audio signal through the flameproof through-wall terminal 20 to enable external loudspeaker telephones to talk to each other. The through-wall terminal 20 has the advantages of stable and reliable connection, further ensuring complete signal collection and convenient wiring.

[0011] Furthermore, the programmable module group 10 is provided with digital IO input and output points, analog input points, Ethernet interface and RS485 interface. The control keyboard 14, function knob 17 and peripheral input signals are processed by the programmable module group 10 and transmitted to the industrial control screen 12 for the operation conditions of the on-site equipment, so that the PLC control box has rich signal acquisition units and data communication interfaces, and has strong compatibility and data processing functions.

[0012] Furthermore, the industrial control panel 12 is provided with an RS232 interface, an RS485 interface, an Ethernet interface and a USB interface. The industrial control panel 12 and the control keyboard 14 are connected via a USB cable. The industrial control panel 12 and the control keyboard 14 are fixed on the door cover panel of the explosion-proof main cavity 1. A glass observation window is provided on the door cover panel, so that personnel can flexibly operate the display screen and have a detailed understanding and control of the equipment operating conditions. At the same time, it supports multiple communication methods, has strong compatibility and high practicality.

[0013] Furthermore, the switch output terminal of the programmable module group 10 is connected to the relay 22, and the state of the external device is controlled by the relay 22.

[0014] Furthermore, the base is arranged on the left and right sides of the bottom of the flameproof main cavity 1, the base extends from the rear end to the front end of the flameproof main cavity 1, and an extension section is provided outward from the front end. The base is installed into a Z-shaped structure by two L-shaped profiles. The base structure further shortens the width of the PLC control box and reduces the volume of the control box.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] (1) The utility model further shortens the width of the PLC control box of the control cabinet by adding a flameproof cavity base, reduces the volume of the control box, effectively reduces the total weight of the PLC control box, and facilitates underground installation and transportation;

[0017] (2) The utility model adds a fuse and a filter module group to effectively filter out high-order harmonics and short-time current impacts, which plays a role in ensuring the stability and reliability of the voltage inside the PLC control box;

[0018] (3) The utility model adds a control keyboard, making the operation of the display screen more convenient; at the same time, an addressing module unit is added to realize intercom communication between loudspeaker phones;

[0019] (4) The utility model adds sound, light and voice communication, so that the early warning and voice broadcast signals of the programmable module group are transmitted to the peripheral equipment in a timely manner, which is convenient for workers to operate;

[0020] In summary, the utility model aims at the deficiencies of the prior art and provides a mine-use explosion-proof and intrinsically safe PLC control box, which has the advantages of convenient operation, a variety of communication interfaces, strong compatibility, full functions, and reduced size of the PLC control box, and is worthy of popularization and application. [Drawings]

[0021] Figure 1 It is the front view of the utility model;

[0022] Figure 2 It is a left view of the utility model;

[0023] Figure 3 It is a right view of the utility model;

[0024] Figure 4 yes Figure 1 Middle AA section view;

[0025] Figure 5 yes Figure 2 Middle BB section view;

[0026] In the figure: 1, flameproof main cavity 2, intrinsically safe wiring cavity 3, cable entry device 4, waterproof connection 5, circuit breaker 6, fuse 7, filter module group 8, switching power supply 9, intrinsically safe power supply 10, programmable module group 11, Ethernet switch 12, industrial control panel 13, addressing module 14, control keyboard 15, interface converter 16, three-hole socket 17, function knob 18, locking switch 19, double-layer terminal block 20, flameproof wall terminal 21, nine-core terminal block 22, relay 23, single-layer terminal block. [Specific implementation method]

[0027] As shown in the accompanying drawings, the utility model provides a flameproof and intrinsically safe PLC control box for mining, comprising a flameproof main cavity 1 installed on a base and an intrinsically safe wiring cavity 2 arranged on the right side of the flameproof main cavity 1, a programmable module group 10, an Ethernet switch 11, an addressing module 13, an interface converter 15, a circuit breaker 5, a fuse 6 and a filter module group 7 are arranged inside the flameproof main cavity 1, a control keyboard 14, a function knob 17 and a locking switch 18 are arranged on the flameproof cavity door cover of the flameproof main cavity 1, the circuit breaker 5, the fuse 6 and the filter module group 7 are all connected to the intrinsically safe power supply 9 and the switching power supply 8, and the fuse 6 and the filter module group 7 are connected to the output side of the locking switch 18, and the control keyboard 14 is connected to the work via a USB cable. On the control panel 12, the function knob 17 is connected to the programmable module group 10 through a control cable. The industrial control panel 12 and the programmable module group 10 are both equipped with communication interfaces. The addressing module 13 is connected to the industrial control panel 12 through an acoustic and visual signal device for communication. The programmable module group 10 and the industrial control panel 12 are respectively connected to the Ethernet switch 11 through a network cable for data exchange. By adopting the above technical solution, the width of the PLC control box is shortened, the total weight of the PLC control box is effectively reduced, and underground installation and transportation are convenient. The addition of fuses and filter module groups can effectively filter out high-order harmonics and short-time current shocks, which ensures the stability and reliability of the internal voltage of the PLC control box. The addition of a control keyboard makes the operation of the industrial control panel more convenient.

[0028] Among them, the programmable module group 10, the Ethernet switch 11, the industrial control panel 12, and the interface converter 15 are respectively connected to the switching power supply 8 and powered by the switching power supply 8, and the addressing module 13 is connected to the intrinsically safe power supply 9 and powered by the intrinsically safe power supply 9, thereby ensuring the quality and reliability of the power supply to the electronic devices in the cabinet. The switch output end of the programmable module group 10 is connected to the relay 22, and the state of the external device is controlled by the relay 22; the programmable module group 10 is provided with digital IO input and output points, analog input points, Ethernet interface and RS485 interface, and the control keyboard 14, function knob 17 and peripheral input signals are processed by the programmable module group 10 and transmitted to the industrial control screen 12 for the operation conditions of the on-site equipment, so that the PLC control box has rich signal acquisition units and data communication interfaces, and has strong compatibility and data processing functions; the industrial control screen 12 is provided with RS232 interface, RS485 interface, Ethernet interface and USB interface, and the industrial control screen 12 and the control keyboard 14 are connected by a USB connection line, and the industrial control screen 12 and the control keyboard 14 are fixed on the door cover panel of the explosion-proof main cavity 1, and a glass observation window is provided on the door cover panel.

[0029] A cable introduction device 3 and a waterproof connector 4 are provided on the right side of the intrinsically safe wiring cavity 2. The power input terminal in the flameproof main cavity 1 is connected to the external power supply through the cable introduction device 3; the external signal is connected to the double-layer wiring row 19 in the intrinsically safe wiring cavity 2 through the waterproof connector 4, and the cables on the double-layer wiring row 19 are connected to the flameproof main cavity 1 through the flameproof through-wall terminal 20. The external network cable and optical fiber are connected to the Ethernet switch 11 in the flameproof main cavity 1 through the flameproof through-wall terminal 20, so as to ensure that the transmission of various signals is effectively separated and does not interfere with each other. The base is provided on the left and right sides of the bottom of the flameproof main cavity 1. The base extends from the rear end to the front end of the flameproof main cavity 1, and an extension section is provided outward from the front end. The base is installed into a Z-shaped structure by two L-shaped profiles. The base structure further shortens the width of the PLC control box and reduces the volume of the control box.

[0030] The utility model relates to the technical field of a PLC control box for mining, which mainly comprises a flameproof cavity base, a flameproof main cavity on the left side of the flameproof cavity on the base, an intrinsically safe wiring cavity on the right side, a cable introduction device is arranged on the right side of the intrinsically safe wiring cavity, a display screen, a control keyboard, and a function knob are arranged on the outer front door panel of the flameproof main cavity, the display screen is connected to the control keyboard through a USB cable, a nine-core wiring terminal and a flameproof through-wall terminal are arranged between the intrinsically safe wiring cavity and the flameproof main cavity, a double-layer wiring row is arranged in the intrinsically safe wiring cavity, and a programmable module group, an isolation safety barrier, a filter module group, a switching power supply, an intrinsically safe power supply, an Ethernet switch, an addressing module, a relay module, a fuse module, a circuit breaker, a single-layer terminal row, and an interface converter are arranged in the flameproof main cavity.

[0031] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0032] A flameproof and intrinsically safe PLC control box for mining, the power supply is connected to the flameproof main cavity through a cable introduction device, the voltage is connected to the intrinsically safe power supply and the switching power supply through a locking switch, a circuit breaker, a fuse, and a filter module, the function of the fuse and the filter module is to prevent short-time overcurrent and high-order harmonics, the switching power supply supplies power to the programmable module group, Ethernet switch, industrial control screen and interface converter in the flameproof main cavity, and the intrinsically safe power supply supplies power to the addressing module and the external sensor; the programmable module group and the industrial control screen are connected to the Ethernet switch through a network cable for data exchange, the industrial control screen is provided with an RS232 interface, an RS485 interface, an Ethernet interface, and a USB interface, and the programmable module group is provided with an RS485 interface, an Ethernet interface and has a digital IO input and output unit and an analog input unit. The external signal is connected to the double-layer wiring bar in the intrinsically safe wiring cavity through a waterproof connector, and the cables on the double-layer wiring bar are connected to the flameproof main cavity through a flameproof through-wall terminal; the external network cable and optical fiber are connected to the Ethernet switch in the flameproof main cavity through a dedicated flameproof through-wall terminal.

[0033] The input and output signals of the peripheral equipment of the equipment and the programmable module group are connected by flameproof through-wall terminals to realize electrical connection and transmission of low-voltage current signals. The intrinsically safe power supply and the switching power supply are electrically connected through the locking switch, fuse and filter module group. The programmable module group is provided with digital IO input and output points, analog input points, Ethernet interface, RS485 interface. The control keyboard, function knob and peripheral input signals are processed by the programmable module group and transmitted to the industrial control screen for equipment operation and control operation. The industrial control screen and the control keyboard are connected by a USB cable to realize the up, down, left, right, cancel and confirm functions; the industrial control screen and the control keyboard are fixed on the door cover panel of the flameproof main cavity, and a glass observation window is provided on the door cover panel. The communication interface specifically includes Ethernet communication, USB communication, RS485 communication, RS232 communication and CAN communication. The addressing module transmits the audio signal through the flameproof through-wall terminal to realize the external loudspeaker telephone to talk to each other. The switch output end of the programmable module group is connected to the relay, and then the state of the external device is controlled by the relay action.

[0034] As another embodiment, the utility model discloses a mine explosion-proof and intrinsically safe PLC control box, such as Figure 5 As shown, it includes a flameproof main cavity on the mounting base, and an intrinsically safe wiring cavity arranged on the right side of the flameproof main cavity; a programmable module group is arranged inside the flameproof main cavity and connected to an Ethernet switch through a network cable; a fuse and a filter module group are connected to the output side of the locking switch and then connected to an intrinsically safe power supply and a switching power supply; the telephone addressing module communicates with the sound and light signal device by connecting to an industrial control panel to communicate with the dispatching main well, and the control keyboard is connected to the industrial control panel through a USB cable; a control keyboard and a function knob are arranged on the flameproof cavity door cover of the flameproof main cavity, the control key is connected to the industrial control panel through a USB cable, the function knob is connected to the programmable module group through a control cable, and the industrial control panel is connected to the Ethernet switch through a network cable to exchange data with other devices.

[0035] like Figure 3 As shown, the power input terminal in the flameproof wiring cavity is connected to the external power supply through the cable introduction device; the optical cable of the Ethernet switch is connected to the intrinsically safe wiring cavity through the flameproof wall terminal, and the external signal is connected to the double-layer wiring block, and then connected to the flameproof main cavity through the flameproof wall terminal.

[0036] like Figure 1As shown, the programmable module group is provided with digital IO input and output points, analog input and output points, Ethernet interface, and RS485 interface. After the function knob and peripheral input signals are processed by the programmable module group, part of them are transmitted to the peripheral control device, and part of them are transmitted to the industrial control screen for the operation condition of the on-site equipment. The industrial control screen and the control keyboard are connected by a USB cable to realize the up, down, left, right, cancel, confirm operation functions and other control functions. The industrial control screen is fixed on the door cover panel of the flameproof main cavity, and a glass observation window is provided on the door cover panel. The industrial control screen displays the equipment operation condition and the real-time data of the on-site equipment in real time, and uploads the data information through the Ethernet switch. The programmable module group is provided with an Ethernet module and the CPU is provided with an RS485 interface. The Ethernet module is connected to the Ethernet switch, the industrial control screen is provided with a communication interface, and the addressing module is provided with a communication interface. All communication interfaces provided in the flameproof main cavity specifically include Ethernet communication, USB communication, RS485 communication, RS232 communication, and CAN communication, which support multiple communication modes and are highly practical.

[0037] The utility model effectively reduces the volume of the PLC control box and the total weight of the PLC control box by changing the flameproof main cavity and shortening the width of the intrinsically safe wiring cavity, thereby facilitating transportation and reducing costs; then, a filter and a filter module group are added to effectively filter out high-order harmonics and short-time voltage impacts to ensure the quality and reliability of power supply for electronic devices in the cabinet; a control keyboard is added to make the operation of the display screen more convenient and more user-friendly; and sound and light signal communication is added to enable the early warning and voice broadcast signals of the programmable module group to be transmitted to peripheral equipment in a timely manner, thereby improving the stability of the system.

[0038] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. The standard parts used can be purchased from the market, and special-shaped parts can be customized according to the records in the specification and drawings. The specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0039] The present invention is not limited to the above-mentioned implementation modes, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be considered as equivalent replacement modes and shall be included in the protection scope of the present invention.

Claims

1. A flameproof and intrinsically safe PLC control box for mining, comprising a flameproof main cavity (1) mounted on a base and an intrinsically safe wiring cavity (2) arranged on the right side of the flameproof main cavity (1), characterized in that: The flameproof main cavity (1) is provided with a programmable module group (10), an Ethernet switch (11), an addressing module (13), an interface converter (15), a circuit breaker (5), a fuse (6) and a filter module group (7); a control keyboard (14), a function knob (17) and a locking switch (18) are provided on the flameproof cavity door cover of the flameproof main cavity (1); the circuit breaker (5), the fuse (6) and the filter module group (7) are all connected to an intrinsically safe power supply (9) and a switch power supply (8); and the fuse (6) and the filter module group (7) are connected to an intrinsically safe power supply (9) and a switch power supply (8); ) is connected to the output side of the locking switch (18), the control keyboard (14) is connected to the industrial control panel (12) via a USB connection cable, the function knob (17) is connected to the programmable module group (10) via a control cable, the industrial control panel (12) and the programmable module group (10) are both provided with a communication interface, the addressing module (13) is connected to the industrial control panel (12) via an acoustic and optical signal device for communication, and the programmable module group (10) and the industrial control panel (12) are respectively connected to an Ethernet switch (11) via a network cable for data exchange.

2. The explosion-proof and intrinsically safe PLC control box for mining as claimed in claim 1 is characterized by: The programmable module group (10), Ethernet switch (11), industrial control panel (12), and interface converter (15) are respectively connected to a switching power supply (8) and powered by the switching power supply (8); the addressing module (13) is connected to an intrinsically safe power supply (9) and powered by the intrinsically safe power supply (9).

3. The explosion-proof and intrinsically safe PLC control box for mining as claimed in claim 1 is characterized by: A cable introduction device (3) and a waterproof connector (4) are provided on the right side of the intrinsically safe wiring cavity (2); the power input terminal in the flameproof main cavity (1) is connected to an external power supply via the cable introduction device (3).

4. The explosion-proof and intrinsically safe PLC control box for mining as claimed in claim 3 is characterized by: The external signal is connected to a double-layer wiring block (19) in the intrinsically safe wiring cavity (2) via a waterproof connector (4); the cables on the double-layer wiring block (19) are connected to the flameproof main cavity (1) via a flameproof through-wall terminal (20); and the external network cable and optical fiber are connected to an Ethernet switch (11) in the flameproof main cavity (1) via the flameproof through-wall terminal (20).

5. The explosion-proof and intrinsically safe PLC control box for mining as claimed in claim 4 is characterized by: The addressing module (13) transmits the audio signal through the flameproof wall-penetrating terminal (20) to enable external loudspeaker telephones to communicate with each other.

6. The explosion-proof and intrinsically safe PLC control box for mining as claimed in claim 1 is characterized by: The programmable module group (10) is provided with digital quantity IO input and output points, analog quantity input points, Ethernet interface and RS485 interface. The control keyboard (14), function knob (17) and peripheral input signals are processed by the programmable module group (10) and then transmitted to the industrial control screen (12).

7. The explosion-proof and intrinsically safe PLC control box for mining as claimed in claim 1 is characterized by: The industrial control screen (12) is provided with an RS232 interface, an RS485 interface, an Ethernet interface and a USB interface; the industrial control screen (12) and the control keyboard (14) are connected via a USB connection line; the industrial control screen (12) and the control keyboard (14) are fixed on a door cover panel of the flameproof main cavity (1); and a glass observation window is provided on the door cover panel.

8. The explosion-proof and intrinsically safe PLC control box for mining as claimed in claim 1 is characterized by: The switch output end of the programmable module group (10) is connected to a relay (22), and the state of an external device is controlled through the relay (22).

9. The explosion-proof and intrinsically safe PLC control box for mining according to any one of claims 1 to 8, characterized in that: The base is arranged on the left and right sides of the bottom of the flameproof main cavity (1), the base extends from the rear end to the front end of the flameproof main cavity (1), and an extension section is provided outward from the front end, and the base is assembled into a Z-shaped structure by two L-shaped profiles.

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