Intrinsic safety type metal detector

Abstract

The utility model discloses an intrinsic safety type metal detector, which comprises a detector main body, a detector control cabinet, an intrinsic safety power supply, a communication substation and a circuit breaker, the detector control cabinet, the intrinsically safe power supply, the communication substation and the circuit breaker are movably arranged outside the detector main body, the communication substation and the circuit breaker are electrically connected with the intrinsically safe power supply after being connected in parallel, the detector main body and the detector control cabinet are electrically connected with the intrinsically safe power supply, and the intrinsically safe power supply, the communication substation and the circuit breaker all comprise explosion-proof shells arranged outside. And the intrinsic safety power supply, the communication substation, the circuit breaker, the detector main body and the detector control cabinet are correspondingly provided with communication ports and power cable connection ports. The device provided by the utility model is simple in structure, is convenient to use, is convenient to maintain, greatly improves the anti-interference performance of equipment, improves the detection effect, reduces the production cost, greatly improves the working efficiency, and is higher in popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of metal detection, in particular to an intrinsically safe metal detector. Background Art

[0002] In recent years, with the rapid development of coal mine production and freight capacity in my country, iron particles in the coal conveying system can cause serious damage to mechanical equipment, especially to components such as conveyor belts. If iron particles are not effectively removed, they may scratch the conveyor belt, causing coal blockage accidents, and thus affecting the safe operation of the entire coal conveying system. In addition, iron particles entering the coal conveying system can cause blockage of the coal drop pipe, and in severe cases, may even tear and break the belt, posing a serious threat to the normal operation of the coal conveying system, greatly affecting production efficiency and increasing production costs. To ensure the safe operation of the coal conveying system, effective measures must be taken to remove iron from the raw coal. The raw coal must undergo multi-stage detection and iron removal to minimize damage to the mechanical equipment of the coal conveying system and ensure the safe operation of the system.

[0003] The industrial metal detectors currently used on the market are large in size and have poor anti-interference capabilities. High-power motors and electromagnetic equipment will cause metal detectors to false alarm. The detection effect is not good enough, and they are inconvenient to maintain and have high operating costs.

[0004] Therefore, in order to ensure the safe operation of the production system and improve the detection effect, it is urgent for engineers and technicians in this field to develop a metal detector to meet production needs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an intrinsically safe metal detector which has a simple structure, is easy to use and maintain, has a strong anti-interference ability, a good detection effect and a low use cost.

[0006] In order to solve the above technical problems, the technical solution of the utility model is:

[0007] A kind of intrinsically safe metal detector comprises: a detector body, a detector control cabinet, an intrinsically safe power supply, a communication substation, and a circuit breaker. The detector body is a rectangular frame structure, and the detector body is arranged on the upper part of a belt conveyor. The detector control cabinet, intrinsically safe power supply, communication substation, and circuit breaker are all movably arranged on the outside of the detector body. The communication substation and circuit breaker are electrically connected to the intrinsically safe power supply after being connected in parallel. The detector body and the detector control cabinet are both electrically connected to the intrinsically safe power supply. The outside of the intrinsically safe power supply, communication substation, and circuit breaker are all provided with explosion-proof shells. The tops of the intrinsically safe power supply, communication substation, and circuit breaker are respectively integrated with handles. The intrinsically safe power supply, communication substation, circuit breaker, detector body, and detector control cabinet are all provided with communication ports and power cable interfaces.

[0008] In the above structure, the detector body is vertically arranged on the upper part of the belt conveyor, and the detector body includes a rectangular outer frame and a metal probe. There are multiple metal probes, and the multiple metal probes are evenly spaced and circumferentially arranged inside the rectangular outer frame. The multiple metal probes are arranged along the moving direction of the belt conveyor, and the multiple metal probes all include corresponding induction coil assemblies.

[0009] In the above structure, a first PCB board is provided inside the detector control cabinet. The first PCB board includes a signal receiving module, a data recording and analysis conversion module, a signal transmitting module and a power amplification module connected to the induction coil assembly. The detector control cabinet and the detector body are connected through corresponding shielded signal lines.

[0010] In the above structure, the intrinsically safe power supply includes a power box, a second PCB board, and an introduction device. The second PCB board includes an intrinsically safe circuit and multiple input ports, output ports, and communication interfaces arranged on the second PCB board. The introduction device is arranged on both sides of the power box corresponding to the multiple input ports, output ports, and communication interfaces.

[0011] In the above structure, the communication substation includes an outer box and a third PCB board. The front side of the outer box is provided with a visual window and multiple control buttons. The multiple control buttons are arranged corresponding to the third PCB board. The third PCB board includes a power line carrier communication module, a storage module, and an analysis module arranged on the third PCB board. The power line carrier communication module sends the results obtained by the analysis module to the breaker.

[0012] In the above structure, the breaker includes a fixing seat and a box body, the box body is movably arranged on the base, the box body and the base are connected by set bolts, a current transformer and a fourth PCB board connected to the current transformer are provided inside the box body, and wire interfaces and communication ports are provided on both sides of the box body corresponding to the current transformer and the control board respectively. The breaker is electrically connected to the intrinsically safe power supply through a corresponding power cable, and the breaker is communicatively connected to the corresponding control end through a shielded signal line.

[0013] In the above structure, the communication substation, the circuit breaker, and the detector control cabinet are respectively connected in communication via corresponding shielded signal lines.

[0014] The beneficial effects of the present invention are:

[0015] This utility model uses a frame-type four-sided detection system as a means of metal detection. The detector control cabinet, intrinsically safe power supply, communication substation, and circuit breaker are installed outside the detector body and connected via shielded signal lines. This utility model can collect and analyze detection data, process actions, transmit information, and record data. It has excellent detection capabilities, accurate analysis capabilities, reliable control capabilities, and anti-interference capabilities. At the same time, this metal detector is adaptable to various types of belts. The utility model has a simple structure, is easy to use and maintain, has strong anti-interference capabilities, good detection results, and low operating costs. It greatly improves production efficiency and meets the requirements of intrinsically safe equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the detector body in an embodiment of the utility model intrinsically safe metal detector;

[0017] Figure 2 This is a structural diagram of a detector control cabinet in an embodiment of the utility model intrinsically safe metal detector;

[0018] Figure 3 This is a schematic diagram of the structure of an intrinsically safe power supply in an embodiment of the intrinsically safe metal detector of the present utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the communication substation in the embodiment of the intrinsically safe metal detector of the present utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the circuit breaker in the embodiment of the intrinsically safe metal detector of the present utility model;

[0021] Figure 6 This is a structural diagram of an embodiment of the utility model intrinsically safe metal detector.

[0022] In the figure, 1-detector body, 2-detector control cabinet, 3-intrinsically safe power supply, 4-communication substation, 5-breaker, 6-belt conveyor. DETAILED DESCRIPTION

[0023] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0024] like Figure 1-6As shown, an intrinsically safe metal detector includes: a detector body 1, a detector control cabinet 2, an intrinsically safe power supply 3, a communication substation 4, and a circuit breaker 5. The detector body 1 is a rectangular frame structure, and the detector body 1 is arranged on the upper part of the belt conveyor 6. The detector control cabinet 2, the intrinsically safe power supply 3, the communication substation 4, and the circuit breaker 5 are all movably arranged on the outside of the metal detector body 1. The communication substation 4 and the circuit breaker 5 are electrically connected to the intrinsically safe power supply 3 after being connected in parallel. The detector body 1 and the detector control cabinet 2 are all electrically connected to the intrinsically safe power supply 3. The intrinsically safe power supply 3, the communication substation 4, and the circuit breaker 5 all include an externally arranged explosion-proof shell. The tops of the intrinsically safe power supply 3, the communication substation 4, and the circuit breaker 5 are respectively integrated with handles. The intrinsically safe power supply 3, the communication substation 4, the circuit breaker 5, the detector body 1, and the detector control cabinet 2 are correspondingly provided with communication ports and power cable interfaces.

[0025] Specifically, in this embodiment, the detector body 1 and the detector control cabinet 2 are separately arranged and connected with a shielded signal line. At the same time, the intrinsically safe power supply 3, the communication substation 4, and the circuit breaker 5 are movably arranged outside the metal detector body 1, and the application of shielded signal line connection greatly improves the anti-interference ability.

[0026] Specifically, in this embodiment, the belt conveyor 6 includes a frame, a conveyor belt movably arranged on the frame, and a drive motor. The detector body 1 matches the belt conveyor 6, and the detector body 1 is bolted to the frame.

[0027] In a preferred embodiment of the present utility model, the detector body 1 is vertically arranged on the upper part of the belt conveyor 6. The detector body 1 includes a rectangular outer frame and a metal probe. There are multiple metal probes, and the multiple metal probes are evenly spaced and circumferentially arranged inside the rectangular outer frame. The multiple metal probes are arranged along the moving direction of the belt conveyor 6, and the multiple metal probes all include correspondingly arranged induction coil assemblies.

[0028] Specifically, in this embodiment, the detector body 1 adopts a frame-type four-sided detection, and the coil uses the self-inductance and mutual inductance principles to screen the raw materials on the conveyor belt.

[0029] In a preferred embodiment of the present invention, a first PCB board is provided inside the detector control cabinet 2. The first PCB board includes a signal receiving module connected to the induction coil assembly, a data recording and analysis conversion module, a signal transmitting module and a power amplification module. The detector control cabinet 2 and the detector body 1 are respectively connected through corresponding shielded signal lines.

[0030] Specifically, in this embodiment, the detector control cabinet 2 is responsible for driving the balance coil, and digitizing the measurement results and sending the detection values. The detector control cabinet 2 processes the collected analog signal information, and performs error identification to make it more accurate to prevent misoperation. After converting it into a digital signal, it is output to the communication substation 4.

[0031] In a preferred embodiment of the present utility model, the intrinsically safe power supply 3 includes a power box, a second PCB board, and an introduction device. The second PCB board includes an intrinsically safe circuit and multiple input ports, output ports and communication interfaces arranged on the second PCB board. The introduction device is arranged on both sides of the power box corresponding to the multiple input ports, output ports and communication interfaces.

[0032] Specifically, in this embodiment, the intrinsically safe power supply 3 is mainly composed of an explosion-proof shell, an intrinsically safe circuit, and an introduction device. Its explosion-proof properties are explosion-proof and intrinsically safe. Its main function is to supply power to the belt conveyor, the detector body 1, the detector control cabinet 2, and provide an interface for data communication.

[0033] In a preferred embodiment of the present utility model, the communication substation 4 includes an outer box and a third PCB board. The front side of the outer box is provided with a visual window and a plurality of control buttons. The plurality of control buttons are arranged corresponding to the third PCB board. The third PCB board includes a power line carrier communication module, a storage module, and an analysis module arranged on the third PCB board. The power line carrier communication module sends the results obtained by the analysis module to the breaker 5.

[0034] Specifically, in this embodiment, the explosion-proof property of the communication substation 4 is intrinsically safe, and it is the core of the entire mining belt conveyor material metal detection device. Its main function is to set the excitation operation starting value ("threshold") of the electromagnetic iron remover, the "working time" of the excitation operation, etc., and compare it with the detection value sent by the detector control cabinet 2 to decide whether to issue relevant action instructions.

[0035] In a preferred embodiment of the present utility model, the breaker 5 includes a fixing seat and a box body, the box body is movably arranged on the base, the box body and the base are connected by set bolts, a current transformer and a fourth PCB board connected to the current transformer are provided inside the box body, and wire interfaces and communication ports are provided on both sides of the box body corresponding to the current transformer and the control board respectively. The breaker 5 is electrically connected to the intrinsically safe power supply 3 through a corresponding power cable, and the breaker 5 is communicatively connected to the corresponding control end through a shielded signal line.

[0036] Specifically, in this embodiment, the explosion-proof properties of the circuit breaker are explosion-proof and intrinsically safe. Its main function is to act as a switching device between intrinsically safe electrical appliances and various explosion-proof electrical appliances, and is responsible for executing the action instructions of the communication substation 4. After the circuit breaker receives the start-up instruction sent by the communication substation 4, it will send the instruction to the outside through its own control relay, and at the same time serve as a feedback channel for the execution status of the iron remover action, and transmit the action execution status to the communication substation 4.

[0037] In a preferred embodiment of the present invention, the communication substation 4, the circuit breaker 5, and the detector control cabinet 2 are respectively connected in communication via corresponding shielded signal lines.

[0038] Working principle of intrinsically safe metal detector:

[0039] When ferrous metal passes through the metal detector on the running belt conveyor 6, the metal detector will generate a corresponding measurement signal and transmit it to the communication substation 4 after converting it into a specific detection value; the communication substation 4 will compare this measurement value with the "preset" value ("threshold") for the start-up of the electromagnetic iron remover input in advance. When the measurement value is greater than the "preset" value, a normally closed start signal will be sent to the circuit breaker 5; since the intrinsically safe equipment cannot be directly connected to the explosion-proof equipment, the circuit breaker 5 needs to be converted once. When the start signal sent by the communication substation 4 reaches the circuit breaker 5, the circuit breaker 5 will send an excitation operation signal to the iron remover electric control cabinet through the built-in contacts. At the same time, the circuit breaker 5 will transmit the feedback signal of whether the action is executed to the communication substation 4 in reverse for recording the operation status; after receiving the start command sent by the communication substation 4, the circuit breaker 5 will send the command to the outside through its own control relay, and at the same time serve as a feedback channel for the execution of the iron remover action to transmit the action execution status to the communication substation 4.

[0040] Specifically, in this embodiment, the metal detector's wiring is centered around the intrinsically safe power supply 3. Since the intrinsically safe power supply 3 is responsible for both powering the various devices and transmitting communication signals, each device component only needs to be connected to the intrinsically safe power supply 3 to complete the metal detector system. Because the actual installation location cannot be determined on-site, the device is provided with a pre-soldered 4-pin aviation plug and a pre-soldered 3-pin aviation plug. RVVP (or ZR-RVVP) shielded signal cable is used, with four cores. If the number of cores exceeds four, only four cores will be used. The colors are red, blue, yellow, and green.

[0041] Specifically, in this embodiment, the wiring of the intrinsically safe power supply 3 is as follows: the intrinsically safe power supply 3 is provided with three sets of output terminals, "H CANL" is a communication data interface, and each output terminal is connected to the three corresponding terminals on the communication substation 4, the circuit breaker 5, and the detector control cabinet 2 using a 4-core shielded signal cable, in any order;

[0042] Specifically, in this embodiment, the wiring of the metal detector is connected to the detector control cabinet 2 located next to the metal detector by a 4-core shielded signal line led out from the output terminal of the intrinsically safe power supply 3; the internal wiring of the metal detector has been connected at the factory, and only two sets of 4-core aviation plugs need to be inserted into the 4-core sockets of the detector control cabinet 2.

[0043] Specifically, in this embodiment, the 4-core shielded signal line connected to the communication substation 4 is connected to each terminal in the order of "red line connected to P+", "blue line connected to P-", "yellow line connected to CH", and "green line connected to CL".

[0044] Specifically, in this embodiment, the breaker 5 serves as an action execution structure, and there are two sets of lines that need to be connected, namely "power supply / communication" and "action / feedback", which are respectively responsible for executing the action instructions from the communication substation 4 and feeding back the action execution status of the electromagnetic iron remover to the communication substation 4.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0047] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. An intrinsically safe metal detector, characterized in that: include: The detector body, detector control cabinet, intrinsically safe power supply, communication substation, and power breaker are provided with a rectangular frame structure, and the detector body is arranged on the upper part of the belt conveyor. The detector control cabinet, intrinsically safe power supply, communication substation, and power breaker are all movably arranged on the outside of the detector body. The communication substation and power breaker are electrically connected to the intrinsically safe power supply after being connected in parallel. The detector body and detector control cabinet are electrically connected to the intrinsically safe power supply. The outside of the intrinsically safe power supply, communication substation, and power breaker are all provided with explosion-proof shells, and the tops of the intrinsically safe power supply, communication substation, and power breaker are respectively provided with handles. The intrinsically safe power supply, communication substation, power breaker, detector body, and detector control cabinet are all provided with communication ports and power cable interfaces.

2. The intrinsically safe metal detector according to claim 1, characterized in that: The detector body is vertically arranged on the upper part of the belt conveyor. The detector body includes a rectangular outer frame and a metal probe. There are multiple metal probes, and the multiple metal probes are evenly spaced and circumferentially arranged inside the rectangular outer frame. The multiple metal probes are arranged along the moving direction of the belt conveyor, and the multiple metal probes all include corresponding induction coil components.

3. The intrinsically safe metal detector according to claim 2, characterized in that: A first PCB board is provided inside the detector control cabinet, and the first PCB board includes a signal receiving module, a data recording and analysis conversion module, a signal transmitting module and a power amplification module connected to the induction coil assembly. The detector control cabinet and the detector body are respectively connected through corresponding shielded signal lines.

4. The intrinsically safe metal detector according to claim 1, characterized in that: The intrinsically safe power supply includes a power box, a second PCB board, and an introduction device. The second PCB board includes an intrinsically safe circuit and multiple input ports, output ports, and communication interfaces arranged on the second PCB board. The introduction device is arranged on both sides of the power box corresponding to the multiple input ports, output ports, and communication interfaces.

5. The intrinsically safe metal detector according to claim 1, characterized in that: The communication substation includes an outer box and a third PCB board. A visual window and multiple control buttons are provided on the front side of the outer box. The multiple control buttons are arranged corresponding to the third PCB board. The third PCB board includes a power line carrier communication module, a storage module, and an analysis module arranged on the third PCB board. The power line carrier communication module sends the results obtained by the analysis module to the circuit breaker.

6. The intrinsically safe metal detector according to claim 1, characterized in that: The breaker includes a fixing seat and a box body, the box body is movably arranged on the base, the box body and the base are connected by set bolts, a current transformer and a fourth PCB board connected to the current transformer are provided inside the box body, and wire interfaces and communication ports are provided on both sides of the box body corresponding to the current transformer and the control board respectively. The breaker is electrically connected to the intrinsically safe power supply through a corresponding power cable, and the breaker is communicatively connected to the corresponding control end through a shielded signal line.

7. The intrinsically safe metal detector according to claim 1, characterized in that: The communication substation, the circuit breaker and the detector control cabinet are respectively connected in communication via corresponding shielded signal lines.

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