Mining flame-proof and intrinsic safety type digital belt weigher system

Abstract

The utility model relates to a mining flame-proof and intrinsic safety type digital belt weigher system, and belongs to the field of belt weighers. The technical problems that an analog belt weigher system cannot judge a faulty sensor and a digital belt weigher system is poor in safety performance are solved. According to the technical scheme, the intrinsically safe signal acquisition device comprises an explosion-proof shell, an intrinsically safe shell and a signal acquisition device, an AC / DC power panel is arranged in the explosion-proof shell, the AC / DC power panel is electrically connected with a DC / DC power panel and a mainboard, the mainboard is further electrically connected with a display module, a DC / DC isolation power supply is arranged in the DC / DC power panel, the DC / DC isolation power supply is electrically connected with a dual overcurrent and overvoltage protection module, a single-chip microcomputer is arranged on the mainboard, and the single-chip microcomputer is electrically connected with the intrinsically safe shell. The single-chip microcomputer is electrically connected with a 485 communication module, a keyboard isolation circuit, a 4G communication module, a programming interface and an expansion interface. The 485 communication module is electrically connected with a plurality of first 485 interfaces and an on-off relay KT, the first 485 interfaces and the on-off relay KT are electrically connected to a first plugboard, and the keyboard isolation circuit is electrically connected with a second plugboard; the utility model is applied to the belt weigher.

Description

Technical Field

[0001] The utility model provides a mine-used flameproof and intrinsically safe digital belt scale system, belonging to the field of belt scales. Background Art

[0002] Most of the existing belt scale sensors are analog sensors, which are more likely to be affected by transmission distance, temperature and humidity, and electromagnetic interference. If one of the analog sensors has a problem, it will affect the entire belt scale system, and it is impossible to determine which sensor is faulty. Digital sensors output digital signals and have strong anti-interference capabilities. For belt scales with multiple sensors, if a digital system is used, the four-corner adjustment is based on microcomputer processing, which will be more convenient and stable. Furthermore, intrinsically safe sensors without explosion-proof function cannot be used in dangerous places in mines. Therefore, the explosion-proof and intrinsically safe digital belt scale system for mines is particularly important. Utility Model Content

[0003] In order to solve the technical problem that the analog belt scale system cannot determine the faulty sensor and the digital belt scale system has poor safety performance, the utility model proposes a mine explosion-proof and intrinsically safe digital belt scale system, the purpose of which is to improve the hardware structure and / or circuit structure of the belt scale so as to avoid interference with the belt scale, quickly determine the faulty sensor and improve the safety performance.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a mine flameproof and intrinsically safe digital belt scale system, comprising a flameproof shell, an intrinsically safe shell and a signal collector, wherein an AC / DC power supply board is arranged in the flameproof shell, wherein the AC / DC power supply board is electrically connected to a DC / DC power supply board and a main board, and wherein the main board is also electrically connected to a display module;

[0005] The DC / DC power supply board is provided with a DC / DC isolated power supply, the DC / DC isolated power supply is electrically connected to a dual overcurrent and overvoltage protection module, and the dual overcurrent and overvoltage protection module outputs an intrinsically safe 12V voltage;

[0006] The mainboard is provided with a single-chip microcomputer, which is electrically connected to a 485 communication module, a keyboard isolation circuit, a 4G communication module, a programming interface and an expansion interface; the 485 communication module is electrically connected to a plurality of first 485 interfaces and a start-stop relay KT, the first 485 interfaces and the start-stop relay KT are electrically connected to a first plugboard, and the keyboard isolation circuit is electrically connected to a second plugboard;

[0007] The intrinsically safe housing is provided with a wiring board and a keyboard, the wiring board is provided with a third plugboard, the third plugboard is electrically connected to a power supply and a plurality of terminal resistors; the power supply is electrically connected to a power supply interface, the terminal resistor is electrically connected to a plurality of second 485 interfaces and a start-stop sensor interface, and the keyboard is serially connected with a plurality of fourth plugboards;

[0008] The signal collector is electrically connected to a number of intrinsically safe weighing sensors, intrinsically safe speed sensors and communication ports for mining; the communication port is connected to the power interface and the second 485 interface on the intrinsically safe housing through the flameproof terminal; the third plug-in board is connected to the dual overcurrent and overvoltage protection module and the first plug-in board through the flameproof terminal;

[0009] The fourth plugboard is electrically connected to the second plugboard via a flameproof terminal;

[0010] The AC / DC power board includes a first power supply DM1 and a second power supply DM2. Pin 1 of the first power supply DM1 and pin 1 of the second power supply DM2 are connected in parallel and then connected in series to one end of a fuse F3. The other end of the fuse F3 is connected to the first interface of the AC127V power supply. Pin 2 of the first power supply DM1 and pin 2 of the second power supply DM2 are connected in parallel and then connected to the third interface of the AC127V power supply. Pin 3 of the first power supply DM1, pin 3 of the second power supply DM2, the second interface of the AC127V power supply and one end of a capacitor CY1 are connected in parallel and then grounded. Pin 5 of the first power supply DM1 is connected in parallel to the first input end of the DC / DC isolation power supply and the 5V interface of the connector J2. Pin 4 of the first power supply DM1 is connected in parallel to the second input end of the DC / DC isolation power supply, the GND interface of the connector J2 and the other end of the capacitor CY1. Pin 8 of the second power supply DM2 is connected in parallel to the first output end of the DC / DC isolation power supply and the 12V interface of the connector J2. Pin 4 of the second power supply DM2 is connected in parallel to the second output end of the DC / DC isolation power supply and the 0V interface of the connector J2.

[0011] Furthermore, port 1 of the start / stop sensor interface is connected in parallel to a 12V power supply and one end of a resistor R204, the other end of the resistor R204 is connected in parallel to one end of a resistor R226 and one end of a fuse F1, the other end of the fuse F1 is connected in parallel to one end of the resistor R1 and an output end of a diode D1, the other end of the resistor R1 is electrically connected to pin 1 of an optocoupler U210, the input end of the diode D1 is connected in parallel to the other end of the resistor R226, port 2 of the start / stop sensor interface and pin 2 of the optocoupler U210, pin 4 of the optocoupler U210 is connected in series with resistor R2 and then connected to one end of the fuse F2 and an output end of the diode D2, the other end of the fuse F2 is connected in series with resistor R203 and then connected to a 3.3V power supply, and pin 3 of the optocoupler U210 is grounded.

[0012] Furthermore, the DC / DC isolated power supply includes a chip with model number CFDA10-24S12.

[0013] Furthermore, the 4G communication module is electrically connected to an antenna via a flameproof terminal.

[0014] Furthermore, the keyboard is provided with a weighing button, a parameter button, an up button, a down button, a cancel button, an confirm button and a plurality of number buttons.

[0015] Furthermore, the intrinsically safe weighing sensor for mining and the intrinsically safe speed sensor for mining are assembled inside the elastomer.

[0016] Furthermore, the AC / DC power board is electrically connected to an AC127V power supply via a flameproof wiring terminal on the flameproof housing.

[0017] Furthermore, the model of the intrinsically safe weighing sensor for mining is the GZD300 series, and the model of the intrinsically safe speed sensor for mining is the GSG5 series.

[0018] Furthermore, the model of the first power supply DM1 is CFAME10S05, and the model of the second power supply DM2 is CFAE15S12W.

[0019] Furthermore, the model of the single chip microcomputer is STM32F103RBT6; the model of the optical coupler U210 is EL817S1; and the model of the diode D1 and the diode D2 is IN5339B.

[0020] The beneficial effects of the present invention compared with the prior art are as follows:

[0021] 1. The flameproof housing and the intrinsically safe housing are connected and communicated through a through-wall line. The intrinsically safe weighing sensor and the intrinsically safe speed sensor for mining are assembled inside the elastic body, which effectively improves the performance of the utility model in dangerous places such as mines;

[0022] 2. The AC / DC power supply board and its circuit setting of the utility model can convert the analog signal collected by the weighing sensor into RS485 digital signal output, and can convert the pulse signal of the speed sensor into RS485 digital signal output, which effectively avoids the problem of signal interference during signal transmission;

[0023] 3. The utility model outputs digital signals to the display module, which can quickly determine whether the sensor is faulty and the specific faulty sensor. At the same time, the utility model can effectively reduce the impact of the faulty sensor on the operation of the entire system;

[0024] 4. The utility model can address the intrinsically safe weighing sensor and the intrinsically safe speed sensor for mining through a programming interface, thereby realizing plug-and-play of the intrinsically safe weighing sensor and the intrinsically safe speed sensor for mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings:

[0026] Figure 1 It is a circuit connection schematic diagram of the utility model;

[0027] Figure 2 This is a schematic diagram of the internal circuit structure of the intrinsically safe housing of the utility model;

[0028] Figure 3 This is a schematic diagram of the internal circuit structure of the explosion-proof housing of the utility model;

[0029] Figure 4 This is a schematic diagram of the circuit structure of the signal collector of the utility model;

[0030] Figure 5 This is the system wiring diagram of the utility model;

[0031] Figure 6 This is a circuit diagram of the AC / DC power supply board of the utility model;

[0032] Figure 7 This is a schematic diagram of the mainboard and its circuit structure of the utility model;

[0033] Figure 8 This is a schematic diagram of the circuit structure of the mainboard and 4G communication module of the utility model;

[0034] Fig. 9 for Figure 7 The schematic diagram of the circuit structure of part A;

[0035] Fig.10 for Figure 7 The schematic diagram of the circuit structure of part B;

[0036] Fig.11 for Figure 7 The schematic diagram of the circuit structure of part C;

[0037] Fig.12 This is a schematic diagram of the start-stop interface and its circuit structure of the utility model;

[0038] Fig.13 This is a schematic diagram of the keyboard circuit structure of the utility model;

[0039] Fig.14 It is a schematic diagram of the voltage stabilizing circuit structure of the utility model. DETAILED DESCRIPTION

[0040] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0041] like Figures 1 to 14 As shown, the utility model provides a flameproof and intrinsically safe digital belt scale system for mining, including a flameproof housing, an intrinsically safe housing and a signal collector, wherein an AC / DC power board is arranged in the flameproof housing, the AC / DC power board is electrically connected to a DC / DC power board and a main board, and the main board is also electrically connected to a display module. A DC / DC isolated power supply is arranged in the DC / DC power board, and the DC / DC isolated power supply is electrically connected to a dual overcurrent and overvoltage protection module, and the dual overcurrent and overvoltage protection module outputs an intrinsically safe 12V voltage.

[0042] A single-chip microcomputer is provided on the main board, and the single-chip microcomputer is electrically connected to a 485 communication module, a keyboard isolation circuit, a 4G communication module, a programming interface and an expansion interface. The 485 communication module is electrically connected to a plurality of first 485 interfaces and a start-stop relay KT, the first 485 interface and the start-stop relay KT are both electrically connected to the first plug board, the keyboard isolation circuit is electrically connected to the second plug board, and the 4G communication module is electrically connected to the antenna through the flameproof terminal. The first 485 interface, the start-stop relay KT and their circuit connections are cast in a casting agent to ensure that the explosion-proof electrical equipment cannot ignite the surrounding explosive mixture under normal operation and approved overload or approved fault.

[0043] The intrinsically safe housing is provided with a wiring board and a keyboard, and the wiring board is provided with a third plug board, and the third plug board is electrically connected to a power supply and a plurality of terminal resistors. The power supply is electrically connected to the power supply interface, and the terminal resistor is electrically connected to a plurality of second 485 interfaces and the start-stop sensor interface, and a plurality of fourth plug boards are connected in series on the keyboard. The keyboard is provided with a weighing button, a parameter button, an up button, a down button, a cancel button, a confirmation button, and ten numeric buttons from 0 to 9.

[0044] The signal collector is electrically connected to four intrinsically safe weighing sensors for mining, one intrinsically safe speed sensor for mining and a communication port; the communication port is connected to the power interface and the second 485 interface on the intrinsically safe shell through flameproof terminals; the third plug-in board is connected to the dual overcurrent and overvoltage protection module and the first plug-in board through flameproof terminals; the fourth plug-in board is electrically connected to the second plug-in board through flameproof terminals.

[0045] The AC / DC power supply board includes a first power supply DM1 and a second power supply DM2. Pin 1 of the first power supply DM1 and pin 1 of the second power supply DM2 are connected in parallel and then connected in series to one end of a fuse F3. The other end of the fuse F3 is connected to the first interface of the AC127V power supply. Pin 2 of the first power supply DM1 and pin 2 of the second power supply DM2 are connected in parallel and then connected to the third interface of the AC127V power supply. Pin 3 of the first power supply DM1, pin 3 of the second power supply DM2, the second interface of the AC127V power supply and one end of the capacitor CY1 are connected in parallel and then grounded; Pin 5 of the first power supply DM1 is connected in parallel to the first input end of the DC / DC isolation power supply and the 5V interface of the connector J2, and Pin 4 of the first power supply DM1 is connected in parallel to the second input end of the DC / DC isolation power supply, the GND interface of the connector J2 and the other end of the capacitor CY1. The 8 pins of the second power supply DM2 are connected to the first output end of the DC / DC isolation power supply and the 12V interface of the connector J2, and the 4 pins of the second power supply DM2 are connected to the second output end of the DC / DC isolation power supply and the 0V interface of the connector J2; the AC / DC power supply board is electrically connected to the AC127V power supply through the flameproof terminal on the flameproof housing. The DC / DC isolation power supply includes a chip with model number CFDA10-24S12.

[0046] Port 1 of the start / stop sensor interface is connected in parallel to a 12V power supply and one end of a resistor R204, the other end of the resistor R204 is connected in parallel to one end of a resistor R226 and one end of a fuse F1, the other end of the fuse F1 is connected in parallel to one end of the resistor R1 and the output end of a diode D1, the other end of the resistor R1 is electrically connected to pin 1 of an optocoupler U210, the input end of the diode D1 is connected in parallel to the other end of the resistor R226, port 2 of the start / stop sensor interface and pin 2 of the optocoupler U210, pin 4 of the optocoupler U210 is connected in series with resistor R2 and then connected to one end of the fuse F2 and the output end of the diode D2, the other end of the fuse F2 is connected in series with resistor R203 and then connected to a 3.3V power supply, and pin 3 of the optocoupler U210 is grounded.

[0047] The model of the intrinsically safe weighing sensor for mining is GZD300 series, and the model of the intrinsically safe speed sensor for mining is GSG5 series; the model of the first power supply DM1 is CFAME10S05, and the model of the second power supply DM2 is CFAE15S12W; the model of the microcontroller is STM32F103RBT6; the model of the optocoupler U210 is EL817S1; the model of the diode D1 and the diode D2 is IN5339B.

[0048] The explosion-proof housing and the intrinsically safe housing of the utility model are connected and communicated through a through-wall line, and the intrinsically safe weighing sensor and the intrinsically safe speed sensor for mining are assembled inside the elastic body, which effectively improves the performance of the utility model in dangerous places such as mines. The AC / DC power supply board and the circuit setting of the utility model can convert the analog signal collected by the weighing sensor into an RS485 digital signal output, and can convert the pulse signal of the speed sensor into an RS485 digital signal output, and effectively avoid the problem of signal interference during the signal transmission process. The utility model outputs the digital signal to the display module, which can quickly determine whether the sensor is faulty and the specific faulty sensor. At the same time, the utility model can effectively reduce the impact of the faulty sensor on the operation of the entire system. The utility model can address the intrinsically safe weighing sensor and the intrinsically safe speed sensor for mining through the programming interface, realize the plug-and-play addressing of the intrinsically safe weighing sensor and the intrinsically safe speed sensor for mining, and improve the installation and use efficiency of the belt scale.

[0049] Regarding the specific structure of the utility model, it should be explained that the connection relationship between the various component modules adopted in the utility model is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring corresponding technical effects and solve the technical problems raised by the utility model without relying on the execution of corresponding software programs. The components, modules, models of specific components and the connection methods between each other appearing in the utility model, as well as the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A flameproof and intrinsically safe digital belt scale system for mining, characterized by: It includes a flameproof housing, an intrinsically safe housing and a signal collector, wherein an AC / DC power board is arranged in the flameproof housing, the AC / DC power board is electrically connected to a DC / DC power board and a main board, and the main board is also electrically connected to a display module; The DC / DC power supply board is provided with a DC / DC isolated power supply, the DC / DC isolated power supply is electrically connected to a dual overcurrent and overvoltage protection module, and the dual overcurrent and overvoltage protection module outputs an intrinsically safe 12V voltage; The mainboard is provided with a single-chip microcomputer, which is electrically connected to a 485 communication module, a keyboard isolation circuit, a 4G communication module, a programming interface and an expansion interface; the 485 communication module is electrically connected to a plurality of first 485 interfaces and a start-stop relay KT, the first 485 interfaces and the start-stop relay KT are electrically connected to a first plugboard, and the keyboard isolation circuit is electrically connected to a second plugboard; The intrinsically safe housing is provided with a wiring board and a keyboard, the wiring board is provided with a third plugboard, the third plugboard is electrically connected to a power supply and a plurality of terminal resistors; the power supply is electrically connected to a power supply interface, the terminal resistor is electrically connected to a plurality of second 485 interfaces and a start-stop sensor interface, and the keyboard is serially connected with a plurality of fourth plugboards; The signal collector is electrically connected to a number of intrinsically safe weighing sensors, intrinsically safe speed sensors and communication ports for mining; the communication port is connected to the power interface and the second 485 interface on the intrinsically safe housing through the flameproof terminal; the third plug-in board is connected to the dual overcurrent and overvoltage protection module and the first plug-in board through the flameproof terminal; The fourth plugboard is electrically connected to the second plugboard via a flameproof terminal; The AC / DC power board includes a first power supply DM1 and a second power supply DM2. Pin 1 of the first power supply DM1 and pin 1 of the second power supply DM2 are connected in parallel and then connected in series to one end of a fuse F3. The other end of the fuse F3 is connected to the first interface of the AC127V power supply. Pin 2 of the first power supply DM1 and pin 2 of the second power supply DM2 are connected in parallel and then connected to the third interface of the AC127V power supply. Pin 3 of the first power supply DM1, pin 3 of the second power supply DM2, the second interface of the AC127V power supply and one end of a capacitor CY1 are connected in parallel and then grounded. Pin 5 of the first power supply DM1 is connected in parallel to the first input end of the DC / DC isolation power supply and the 5V interface of the connector J2. Pin 4 of the first power supply DM1 is connected in parallel to the second input end of the DC / DC isolation power supply, the GND interface of the connector J2 and the other end of the capacitor CY1. Pin 8 of the second power supply DM2 is connected in parallel to the first output end of the DC / DC isolation power supply and the 12V interface of the connector J2. Pin 4 of the second power supply DM2 is connected in parallel to the second output end of the DC / DC isolation power supply and the 0V interface of the connector J2.

2. The flameproof and intrinsically safe digital belt scale system for mining according to claim 1, characterized in that: Port 1 of the start / stop sensor interface is connected in parallel to a 12V power supply and one end of a resistor R204, the other end of the resistor R204 is connected in parallel to one end of a resistor R226 and one end of a fuse F1, the other end of the fuse F1 is connected in parallel to one end of a resistor R1 and an output end of a diode D1, the other end of the resistor R1 is electrically connected to pin 1 of an optocoupler U210, the input end of the diode D1 is connected in parallel to the other end of the resistor R226, port 2 of the start / stop sensor interface and pin 2 of the optocoupler U210, pin 4 of the optocoupler U210 is connected in series with resistor R2 and then connected to one end of a fuse F2 and an output end of a diode D2, the other end of the fuse F2 is connected in series with resistor R203 and then connected to a 3.3V power supply, and pin 3 of the optocoupler U210 is grounded.

3. The flameproof and intrinsically safe digital belt scale system for mining according to claim 1, characterized in that: The DC / DC isolated power supply includes a chip with model number CFDA10-24S12.

4. The flameproof and intrinsically safe digital belt scale system for mining according to claim 1, characterized in that: The 4G communication module is electrically connected to the antenna via a flameproof terminal.

5. The flameproof and intrinsically safe digital belt scale system for mining according to claim 1, characterized in that: The keyboard is provided with a weighing key, a parameter key, an up key, a down key, a cancel key, a confirm key and a plurality of number keys.

6. The flameproof and intrinsically safe digital belt scale system for mining according to claim 1, characterized in that: The mine-used intrinsically safe weighing sensor and the mine-used intrinsically safe speed sensor are assembled inside the elastic body.

7. The flameproof and intrinsically safe digital belt scale system for mining according to claim 1, characterized in that: The AC / DC power supply board is electrically connected to an AC127V power supply via a flameproof wiring terminal on the flameproof housing.

8. The flameproof and intrinsically safe digital belt scale system for mining according to claim 1, characterized in that: The model of the intrinsically safe weighing sensor for mining is the GZD300 series, and the model of the intrinsically safe speed sensor for mining is the GSG5 series.

9. The flameproof and intrinsically safe digital belt scale system for mining according to claim 1, characterized in that: The model of the first power supply DM1 is CFAME10S05, and the model of the second power supply DM2 is CFAE15S12W.

10. The flameproof and intrinsically safe digital belt scale system for mining according to claim 2, characterized in that: The model of the single chip microcomputer is STM32F103RBT6; the model of the optical coupler U210 is EL817S1; the model of the diode D1 and the diode D2 are IN5339B.

Images