Control box for belt temperature measurement

Abstract

The utility model relates to the technical field of coal mine production safety, in particular to a control box for belt temperature measurement, which comprises an explosion-proof box body, and a touch screen and a reset button are arranged on the surface of the explosion-proof box body. A single-chip microcomputer control module, a 485 conversion module, a main power supply module, a 18V intrinsic safety power supply, a 5V intrinsic safety power supply, a two-optical three-electric switch, an optical fiber temperature sensing detection module and a reset relay are arranged in the explosion-proof box body. Wherein a normally closed contact of the reset relay is connected in series in a power supply circuit between the main power supply module and the 5V intrinsic safety power supply; and the power supply output end of the 18V intrinsic safety power supply, the reset button and the coil terminal of the reset relay form a reset circuit. A touch screen is added to facilitate field checking of monitoring data, a reset circuit is added to achieve power-off reset of the single-chip microcomputer module, and the single-chip microcomputer module does not send control signals to the branch control box any more after power off so that remote manual shutdown of the explosion-proof electromagnetic valve can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine production safety, in particular to a control box for belt temperature measurement. Background Art

[0002] The belt conveyor is one of the key equipment in the coal transportation system. During operation, the coal conveyor belt may generate high temperature due to factors such as belt friction and external temperature when transporting coal, resulting in the risk of spontaneous combustion of the transported coal. In order to eliminate this hidden danger, temperature sensors and infrared temperature measuring equipment are currently widely used to detect the temperature near the conveyor belt in real time. In actual use, the detection range of the temperature sensor is limited. If you want to achieve full-line detection of the conveyor belt, you need to set up a certain number of temperature sensors, and the detection circuit is complicated; infrared temperature measuring equipment has the characteristics of large temperature measurement field and wide detection range, but it is affected by dust and water vapor in the on-site environment, which can easily lead to a decrease in the accuracy of temperature measurement at a long-distance field of view. Based on this, our company proposed the use of optical fiber temperature measurement to detect belt temperature (for details, please refer to 2023217962982, belt temperature monitoring and early warning system) and achieved good results in actual production. Now we optimize the electrical structure of the original control box to better meet the needs of the production site. Utility Model Content

[0003] In view of the above problems, an embodiment of the utility model provides a control box for belt temperature measurement.

[0004] The embodiment of the utility model provides a control box for belt temperature measurement, including an explosion-proof box, a touch screen and a reset button are arranged on the surface of the explosion-proof box, and a single-chip control module, a 485 conversion module, a main power supply module, an 18V intrinsically safe power supply, a 5V intrinsically safe power supply, a two-optical and three-electric switch, an optical fiber temperature sensing detection module and a reset relay are arranged inside the explosion-proof box;

[0005] The main power supply module is connected to the 18V intrinsically safe power supply, the two-optical and three-electrical switch, the optical fiber temperature sensing detection module and the 5V intrinsically safe power supply. The 5V intrinsically safe power supply is connected to the single-chip control module. The 18V intrinsically safe power supply is connected to the 485 conversion module.

[0006] The normally closed contact of the reset relay is connected in series in the power supply circuit between the main power module and the 5V intrinsically safe power supply; the power output terminal of the 18V intrinsically safe power supply, the reset button and the coil terminal of the reset relay constitute a reset circuit;

[0007] The single chip control module is connected to the two-optical and three-electrical switch, the 485 conversion module and the touch screen for communication, and the two-optical and three-electrical switch is connected to the optical fiber temperature sensing detection module for communication.

[0008] Compared with the prior art, the beneficial effects of the utility model are: adding a touch screen can facilitate on-site viewing of monitoring data, adding a reset circuit can realize power-off reset of the single-chip microcomputer module, and after power-off, the single-chip microcomputer module no longer sends a control signal to the sub-control box, so as to realize remote manual shutdown of the explosion-proof solenoid valve.

[0009] Optionally, an I / O expansion module and an expansion relay electrically connected to the I / O expansion module are also provided inside the explosion-proof box. The I / O expansion module is connected to an 18V intrinsically safe power supply, and the I / O expansion module is communicatively connected to a 485 conversion module.

[0010] Optionally, a spectrometer is further provided inside the explosion-proof box, and the spectrometer is communicatively connected to the optical fiber temperature sensing detection module.

[0011] Optionally, a mouse interface chip is also provided inside the explosion-proof box, and the mouse interface chip is communicatively connected with the single-chip microcomputer control module. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation of the present invention. In the drawings:

[0013] Figure 1 A schematic diagram of the system architecture of a control box for belt temperature measurement provided in an embodiment of the utility model.

[0014] Among them, touch screen 1, reset button 2, single-chip control module 3, 485 conversion module 4, main power module 5, 18V intrinsically safe power supply 6, 5V intrinsically safe power supply 7, two-optical and three-electrical switch 8, fiber optic temperature detection module 9, reset relay 10, I / O expansion module 11, expansion relay 12, splitter 13, mouse interface chip 14, temperature measurement optical fiber 15. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with the implementation mode and the accompanying drawings. Here, the schematic implementation mode of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0016] See also Figure 1 The embodiment of the utility model provides a belt temperature measurement control box, including an explosion-proof box, a touch screen 1 and a reset button 2 are arranged on the surface of the explosion-proof box, and a single-chip control module 3, a 485 conversion module 4, a main power supply module 5, an 18V intrinsically safe power supply 6, a 5V intrinsically safe power supply 7, a two-optical and three-electric switch 8, an optical fiber temperature detection module 9 and a reset relay 10 are arranged inside the explosion-proof box;

[0017] The main power supply module 5 is connected to the 18V intrinsically safe power supply 6, the two-optical and three-electric switch 8, the optical fiber temperature sensing detection module 9 and the 5V intrinsically safe power supply 7, the 5V intrinsically safe power supply 7 is connected to the single-chip control module 3, and the 18V intrinsically safe power supply 6 is connected to the 485 conversion module 4; in a specific implementation, an AC127V power supply is connected to the main power supply module 5 for power supply, and the main power supply module 5 uses an intrinsically safe power supply with two output voltages of 12V and 24V. The output 12V voltage supplies power to the optical fiber temperature sensing detection module 9, and the output 24V voltage supplies power to the 18V intrinsically safe power supply 6, the 5V intrinsically safe power supply 7 and the two-optical and three-electric switch 8;

[0018] The normally closed contact of the reset relay 10 is connected in series in the power supply circuit between the main power module 5 and the 5V intrinsically safe power supply 7; the power output end of the 18V intrinsically safe power supply 6, the reset button 2 and the coil terminal of the reset relay 10 constitute a reset circuit; when the reset button 2 is pressed, the coil of the reset relay 10 is energized and the normally closed contact is disconnected, thereby controlling the power supply circuit between the main power module 2 and the 5V intrinsically safe power supply 7 to be disconnected, and the single-chip control module 3 stops working; after the corresponding reset button 2 is restored, the power supply circuit between the main power module 5 and the 5V intrinsically safe power supply 7 is closed again to complete the power-on restart of the single-chip control module 3;

[0019] The single-chip control module 3 is communicatively connected with the two-optical and three-electrical switch 8, the 485 conversion module 4 and the touch screen 1, and the two-optical and three-electrical switch 8 is communicatively connected with the optical fiber temperature sensing detection module 9; while the communication between the single-chip control module 3 and the optical fiber temperature sensing detection module 9 is realized through the two-optical and three-electrical switch 8, data transmission between the single-chip control module 3 and a remote device (such as a host computer) can also be realized.

[0020] In practice, an I / O expansion module 11 and an expansion relay 12 electrically connected to the I / O expansion module 11 are also provided inside the explosion-proof box. The I / O expansion module 11 is connected to the 18V intrinsically safe power supply 6 for power supply, and the I / O expansion module 11 is connected to the 485 conversion module 4 for communication. The I / O expansion module 11 and the expansion relay 12 can realize the functional expansion of the control box, such as adding a detection sensor for deviation, tearing and other states on the conveyor belt, the detection sensor is connected to the I / O expansion module 11, and when an abnormality is detected, an electrical signal is sent to the I / O expansion module 11, and the I / O expansion module 11 forwards the received electrical signal to the single-chip control module 3. After receiving the electrical signal, the single-chip control module 3 controls the expansion relay 12 to operate through the I / O expansion module 11, thereby controlling the alarm device (alarm light, loud speaker, etc.) connected to the expansion relay 12 to alarm.

[0021] During implementation, a spectrometer 13 is also provided inside the explosion-proof box, and the spectrometer 13 is communicatively connected with the optical fiber temperature sensing detection module 9, so that multiple temperature measuring optical fibers 15 can be laid and tested simultaneously; for example, three temperature measuring optical fibers 15 are provided, two of which are provided on both sides of the conveyor belt, and one is provided above the conveyor belt, and the three temperature measuring optical fibers 15 are all connected to the spectrometer 13; the three temperature measuring optical fibers 15 are used to test the conveyor belt simultaneously to improve the comprehensiveness and accuracy of the test results.

[0022] During implementation, a mouse interface chip 14 is also provided inside the explosion-proof box. The mouse interface chip 14 is connected to the single-chip control module 3 for communication. An external mouse can be connected through the mouse interface chip 14, and the corresponding detection data can be conveniently controlled and viewed through the mouse.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A control box for belt temperature measurement, comprising an explosion-proof box, characterized in that: The surface of the explosion-proof box is provided with a touch screen and a reset button. Inside the explosion-proof box are provided with a single-chip control module, a 485 conversion module, a main power module, an 18V intrinsically safe power supply, a 5V intrinsically safe power supply, a two-optical and three-electrical switch, an optical fiber temperature sensing detection module and a reset relay; The main power supply module is connected to the 18V intrinsically safe power supply, the two-optical and three-electrical switch, the optical fiber temperature sensing detection module and the 5V intrinsically safe power supply. The 5V intrinsically safe power supply is connected to the single-chip control module. The 18V intrinsically safe power supply is connected to the 485 conversion module. The normally closed contact of the reset relay is connected in series in the power supply circuit between the main power module and the 5V intrinsically safe power supply; the power output terminal of the 18V intrinsically safe power supply, the reset button and the coil terminal of the reset relay constitute a reset circuit; The single chip control module is connected to the two-optical and three-electrical switch, the 485 conversion module and the touch screen for communication, and the two-optical and three-electrical switch is connected to the optical fiber temperature sensing detection module for communication.

2. The belt temperature measurement control box according to claim 1, characterized in that: An I / O expansion module and an expansion relay electrically connected to the I / O expansion module are also provided inside the explosion-proof box. The I / O expansion module is connected to an 18V intrinsically safe power supply, and the I / O expansion module is connected to a 485 conversion module for communication.

3. The belt temperature measurement control box according to claim 1, characterized in that: A spectrometer is also provided inside the explosion-proof box, and the spectrometer is communicatively connected with the optical fiber temperature sensing detection module.

4. The belt temperature measurement control box according to claim 1, characterized in that: A mouse interface chip is also arranged inside the explosion-proof box, and the mouse interface chip is communicatively connected with the single-chip microcomputer control module.

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