CN216646842U - Flat plate type metal detector applied to belt conveyor - Google Patents

Abstract

The application discloses a flat-plate type metal detector applied to a belt conveyor, wherein the metal detector is positioned below a conveying belt of the belt conveyor and comprises a transmitting coil, a receiving coil and an insulating plate for fixing the transmitting coil and the receiving coil; the transmitting coil and the receiving coil are located in the same horizontal plane, and the receiving coil is symmetrically arranged on the inner side of the transmitting coil along the axis of the transmitting coil. This application can prevent that the bold material on the transfer chain from colliding the metal detection instrument, reduces the metal detection instrument and appears the wrong report and damage the phenomenon, simultaneously transmitting coil and receiving coil are located the coplanar, can reduce because of the vibration leads to taking place the influence that the dislocation caused between the coil, improves the accuracy that the metal detection instrument detected.

Description

Flat plate type metal detector applied to belt conveyor

Technical Field

The application relates to the technical field of metal detection equipment, in particular to a flat plate type metal detector applied to a belt conveyor.

Background

In the field of ore transportation, in order to prevent metals from being mixed in materials, a metal detector is generally required to be arranged on a material conveying device (such as a belt conveyor, a large-inclination-angle belt conveyor and the like) to remove the metals mixed in the materials, so that stable operation in a subsequent processing process is ensured. The working principle of the metal detector is as follows: according to the principle of electromagnetic induction, alternating magnetic field is generated by using a coil through which alternating current passes, the alternating magnetic field can generate induced eddy current in a metal object, and the magnetic field generated by the eddy current influences the original magnetic field, so that the metal mixed in the material is detected, and the metal detector is triggered to give an alarm. According to different signal acquisition, comparison and analysis modes of the metal detector, the metal detector can be divided into a single-coil metal detector and a balanced-coil metal detector.

The balance coil type metal detector is a metal detector widely used in the market at present due to high detection sensitivity, stability and reliability. Balanced coil metal detectors typically include a transmitting coil and a receiving coil. The transmitting coil is electrified with alternating current to generate an alternating magnetic field. The receiving coils are composed of two coils with the same area and size, and the arrangement modes of the receiving coils are two, wherein the first mode is that the two receiving coils are simultaneously positioned right above or right below the transmitting coil; the second is that two receive coils are located on opposite sides of the transmit coil.

Taking the first arrangement as an example, the two receiving coils are parallel to the transmitting coil and symmetrically distributed in the same plane right above or right below the transmitting coil for receiving the electromagnetic field generated by the transmitting coil. Because the area and the number of turns of the two coils are the same and are in the same electromagnetic field, the induced electromotive forces generated by the two receiving coils are the same in magnitude and opposite in direction, the output is zero, and the magnetic field between the transmitting coil and the receiving coil is in a balanced state at the moment. When metal enters or passes through the balanced magnetic field, the electromotive force balance of the receiving coil is broken, so that the metal mixed in the material is detected.

However, the conventional balance coil metal detector housing is usually of a frame structure, and the balance coil metal detector is usually mounted on a rack below a conveyor belt, so that the conveyor belt passes through an area surrounded by an upper beam and a lower beam of the balance coil metal detector. In addition, because the magnetic field is attenuated in the space, the distance between the bottom surface of the upper beam and the top surface of the lower beam of the shell of the balanced coil type metal detector cannot be too high, otherwise, the detection precision of the shell of the balanced coil type metal detector can be seriously influenced.

Therefore, when massive materials are transported on the conveying line, the materials possibly touch the upper beam of the balance coil type metal detector, the balance coil type metal detector is slightly damaged due to false alarm caused by vibration, and the balance coil type metal detector is damaged seriously. Secondly, the balance coil type metal detector is installed on the rack, the conveying device can vibrate when running, and the balance coil type metal detector vibrates along with the conveying device, so that the relative position of the transmitting coil and the receiving coil changes, the induced electromotive force of the receiving coil is influenced, and the false alarm of the balance coil type metal detector is caused.

It can thus be seen that the prior art is subject to further improvement and advancement.

SUMMERY OF THE UTILITY MODEL

The present application provides a flat metal detector applied to a belt conveyor to solve at least one of the above technical problems.

The technical scheme adopted by the application is as follows:

the application provides a flat-plate type metal detector applied to a belt conveyor, wherein the metal detector is positioned below a conveying belt of the belt conveyor and comprises a transmitting coil, a receiving coil and an insulating plate for fixing the transmitting coil and the receiving coil; the transmitting coil and the receiving coil are located in the same horizontal plane, and the receiving coil is symmetrically arranged on the inner side of the transmitting coil along the axis of the transmitting coil.

In a preferred embodiment of the present invention, there is one transmitting coil, there are two receiving coils, and two identical receiving coils are symmetrically disposed along an axis of the transmitting coil.

In a preferred embodiment of the present invention, the metal detector further includes a housing having a mounting cavity, the insulating plate is located in the mounting cavity, and a filling gap is provided between the insulating plate and an inner wall of the housing.

In a preferred embodiment of the present invention, the filling gap is provided with a filler for isolating an electric field and/or a magnetic field between the insulating plate and the case.

As a preferred embodiment of the present invention, the belt conveyor includes a body and a conveying belt capable of rotating around the body, the body is provided with a fixing portion, the housing is provided with a fitting portion, and the fitting portion is fitted with the fixing portion, so that the metal detector is located between the conveying belts and detects a material located on the conveying belt.

As a preferred embodiment of the present invention, the belt conveyor further includes a plurality of support rollers disposed on the body and extending upward, and the plurality of support rollers are uniformly distributed in a length direction of the body to support and guide the conveyor belt.

In a preferred embodiment of the present invention, an anti-slip pad for increasing a friction force between the metal detector and the machine body is disposed at a bottom of the housing.

As a preferred embodiment of the present invention, the metal detector further includes a master control box, the master control box is located at an end portion of the housing, and when the metal detector and the machine body are located at an assembling position, a gap is formed between a side wall of the master control box and an edge of the conveyor belt.

As a preferred embodiment of the present invention, the main control box includes a box body and a door body for opening and closing the box body, and a main control board, a power supply, a transformer and a display device connected to each other are disposed in the box body; the door body is hinged with the box body and used for opening or closing the box body.

As a preferred embodiment of the present invention, the door body is provided with an observation window, and the observation window corresponds to the display device.

Due to the adoption of the technical scheme, the technical effects obtained by the application are as follows:

1. according to the flat-plate type metal detector (hereinafter referred to as metal detector) applied to the belt conveyor, the transmitting coil and the receiving coil are both fixed on the insulating plate, so that the transmitting coil and the receiving coil are always located in the same horizontal plane, and the receiving coil is symmetrically arranged on the inner side of the transmitting coil along the axis of the transmitting coil, so that the transmitting coil and the receiving coil can form a flat-plate type structure. When the belt conveyor is used for conveying materials with large volumes, the flat plate type metal detector is arranged below the conveying belt, so that large materials cannot collide with the metal detector and cannot influence the metal detector, and the situation that the metal detector is misreported or damaged is avoided to the greatest extent. In addition, because the transmitting coil and the receiving coil are arranged on the same plane, when the belt conveyor vibrates, the transmitting coil and the receiving coil can vibrate together, so that the change of the relative position between the transmitting coil and the receiving coil can be reduced, and the influence of the vibration of the belt conveyor on the detection precision of the metal detector can be reduced.

2. As a preferred embodiment of the present application, the magnetic field is stronger because the magnetic induction lines on the inner side of the transmitting coil are denser than the magnetic induction lines on the outer side of the transmitting coil. Therefore, the two same receiving coils are symmetrically distributed on the inner side of the transmitting coil along the axis of the transmitting coil, so that induced electromotive force and an induced magnetic field generated by the receiving coils can be enhanced, the metal detector is more sensitive, and the accuracy of the metal detector is improved.

3. In a preferred embodiment of the present application, the filling gap is provided with a filler for isolating the insulating plate from the electric and/or magnetic field of the housing, in order to fix the insulating plate; on the other hand, the filler can be made of a non-magnetic and non-conductive material, so that the influence of the outside on the magnetic fields of the transmitting coil and the receiving coil on the insulating plate is reduced, and the detection accuracy of the metal detector is further improved.

4. As a preferred embodiment of the present application, the metal detector and the belt conveyor are fixedly connected by the engagement between the engagement portion and the fixing portion. Because conveyor belt can rotate around the organism, consequently can be through setting up the mode between conveyor belt with the fixed part, make the metal detection appearance can detect the material on conveyor belt. And, the metal detector is closer to the one side that is used for transporting the material in the conveyer belt in this kind of setting mode, can make the distance between metal detector and the material of waiting to detect nearer from this to do benefit to the accuracy that promotes metal detector.

5. As a preferred embodiment of the present application, an anti-slip pad is disposed at the bottom of the housing of the metal detector, so that friction between the metal detector and the housing can be increased, the metal detector is prevented from slipping on the belt conveyor, and the metal detector is more stable in the using process.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic view of a first prior art configuration of a coil of a metal detector;

FIG. 2 is a schematic diagram of a second prior art configuration of a metal detector coil;

FIG. 3 is a schematic diagram of a third prior art configuration of a metal detector coil;

FIG. 4 is a schematic diagram of a prior art metal detector;

FIG. 5 is a schematic diagram of a flat plate metal detector coil according to an embodiment of the present application;

FIG. 6 is a schematic diagram of another embodiment of a flat panel metal detector coil according to the present disclosure;

FIG. 7 is a schematic structural diagram of a flat panel metal detector according to an embodiment of the present disclosure;

FIG. 8 is a schematic view of another exemplary embodiment of a flat panel metal detector;

FIG. 9 is a schematic diagram illustrating a configuration of a flat metal detector and a belt conveyor in an assembled position according to an embodiment of the present disclosure;

fig. 10 is a partial enlarged view of the structure at a in fig. 9.

Reference numerals:

100 measured metal, 101 transmitting coil, 102 receiving coil, 103 insulating plate, 104 upper beam bottom surface and 104 lower beam top surface;

200 belt conveyors, 201 machine body, 202 conveying belt, 203 fixing part and 204 supporting roller;

300 main control box, 301 box body, 302 door body, 303 observation window;

400 shell, 401 fill gap, 402 mating portion, 403 cleat.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like refer to orientations or positional relationships illustrated in the drawings, which are used for convenience in describing the present application and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting of the present application.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

At present, the transmitting coil and the receiving coil in the metal detector on the market are mostly arranged in the arrangement mode as shown in fig. 1, fig. 2 and fig. 3, and the frame type shell as shown in fig. 4 is mostly adopted as the shell. However, since the magnetic field is attenuated in space, the distance between the upper beam bottom surface 104 and the lower beam top surface 105 of the frame of the metal detector cannot be too high, otherwise the sensitivity and accuracy thereof are greatly affected.

Based on this, as shown in fig. 5, an embodiment of the present invention provides a flat type metal detector applied to a belt conveyor, the metal detector including a transmitting coil 101 and a receiving coil 102, and an insulating plate 103 for fixing the transmitting coil 101 and the receiving coil 102. The transmitting coil 101 and the receiving coil 102 are located in the same horizontal plane, and the receiving coil 102 is symmetrically arranged on the inner side of the transmitting coil 101 along the axis of the transmitting coil, so that when the metal 100 to be detected enters or passes through the magnetic field, the balanced magnetic field is broken, and the metal detector can detect the metal mixed in the conveyed material.

As a preferred implementation manner of this embodiment, the number of the transmitting coils 101 may be one, the number of the receiving coils 102 may be two, the two receiving coils 102 are equal in size and shape, and the two identical receiving coils 102 are symmetrically arranged on the inner side of the transmitting coils 101 along the axis thereof. The transmitting coil 101, the receiving coil 102, and the insulating plate 103 may be connected by an adhesive such as vinyl acetate resin, epoxy resin, or chlorinated rubber, or may be connected by an insulating tape or an insulating tape; or a limiting groove can be arranged on the insulating plate, and the receiving coil and the transmitting coil are fixedly connected in the limiting groove, so that the specific connection structure among the transmitting coil, the receiving coil and the insulating plate is not limited.

The insulating plate 103 can be made of rubber, phenolic resin or ceramic, so that the insulating plate 103 reduces the influence on the magnetic fields of the transmitting coil 101 and the receiving coil 102; when the three components are connected and fixed by an adhesive, a non-magnetic conductive material and a non-electric conductive material are preferably adopted to reduce the disturbance of the fixing material to the magnetic field.

It should be noted that the number, shape and size of the receiving coils 102 are not limited in the present invention. Specifically, the receiving coil 102 may include two rectangular receiving coils 102 distributed along the axis of the rectangular transmitting coil 101 as shown in fig. 5, may include four circular receiving coils 102 as shown in fig. 6, may include even six or more even an even greater number of receiving coils 102, and may have a rectangular, square, rhombic shape, or the like. Preferably, the shape and size of the transmitting coil 101 and the receiving coil 102 are related to the model number of the conveyor to which the metal detector is mounted, wherein the smaller the transmitting coil 101 and the receiving coil 102 are, the denser the magnetic induction lines passing through the coils are, and the higher the accuracy of the metal detector is, within the range of the coil size allowed by the model number of the conveyor.

The transmitting coil 101 and the receiving coil 102 are formed by winding enameled wires made of copper wires coated with insulating layers on the outer layers, so that a stronger magnetic field can be provided while good conductivity is ensured, and the transmitting coil 101 and the receiving coil 102 are not easy to short-circuit. In addition, copper has better ductility and fatigue resistance than other conductive materials (such as aluminum), and can be more conveniently manufactured into different shapes of the transmitting coil 101 and the receiving coil 102 to adapt to different use environments.

Further, as shown in fig. 7, the metal detector may further include a housing 400, a mounting cavity (not labeled) in which the insulating plate 103 is disposed inside the housing 400, and a filling gap 401 exists between the insulating plate 103 and an inner wall of the housing 400. The filling gap 401 is filled with a filler (not shown) to isolate the electric field and/or the magnetic field between the insulating plate 103 and the housing 400.

Optionally, the casing 400 may be an all-metal casing, and in a severe working environment, when there is a collision of impurities, the coil on the insulating plate 103 in the casing 400 may be protected. The filler can be non-magnetic and non-conductive materials such as foaming agent and test paper.

Further, the outer surface of the case 400 may be coated with waterproof paint such as polyurethane paint, acrylic paint, polymer cement-based paint, etc., so that the metal detector may be operated in bad rainy and snowy weather, resulting in a wider range of use of the metal detector.

Preferably, as shown in fig. 8, the bottom of the housing 400 is provided with a non-slip pad 403. The anti-skid pad 403 can be made of wear-resistant rubber, the wear-resistant rubber has good wear resistance, shock resistance and buffering performance, the service life of the anti-skid pad is prolonged, meanwhile, the friction force between the metal detector and the machine body 201 is improved, and the metal detector is prevented from sliding due to vibration in the working process of the equipment.

Optionally, when the number of the anti-skid blocks 403 is not particularly limited, when the number is multiple, the shapes and sizes of the anti-skid blocks 403 are consistent and uniformly distributed at the bottom of the shell, so as to ensure that the stress on the shell 400 is uniform, prevent the metal detector from slipping, and make the working environment of the metal detector more stable.

Specifically, as shown in fig. 9, the flat type metal detector is applied to a belt conveyor 200, and the belt conveyor 200 includes a body 201 and a conveyor belt 202 rotating around the body. In addition, can also be equipped with a plurality of backing rolls 204 that set up on organism 201 and upwards extend on belt conveyor 200, this application does not specifically limit to the quantity of backing roll 204, and a plurality of backing rolls 204 evenly distributed on the length direction of organism 201, be provided with the cylinder of supplementary guide conveyor belt 202 on the backing roll 204 to support the guide to conveyor belt 202, prevent to lead to conveyor belt tenesmus because of material self weight in the material transportation, and then influence belt conveyor 200's whole operation.

Optionally, the material of the conveying belt 202 may be silica gel, PVC, rubber, or the like, so that the conveying belt 202 has characteristics of corrosion resistance and static electricity resistance, and when the conveying belt 202 operates in a severe environment, the influence on the metal detector is reduced, and the accuracy of the metal detector is improved.

Further, as shown in fig. 9, the metal detector may further include a master box 300, the master box 300 is fixed to an end of the housing 400, and when the metal detector and the belt conveyor 200 are located at the assembling position, a gap exists between a side wall of the master box 300 and the conveyor belt 202, so as to prevent the conveyor belt 202 from contacting the master box 300 during the operation of the apparatus, which may cause continuous contact friction between the conveyor belt 202 and the master box 300, and damage to the conveyor belt 202 and the master box 300.

Specifically, the main control box 300 includes a box body 301 and a door body 302, and a main control board (not shown in the drawings), a power supply (not shown in the drawings), a transformer (not shown in the drawings) and a display device (not shown in the drawings) are arranged in the box body 301 and connected with each other; the main control board adopts a dual-core CPU, so that the information of the metal detected by the metal detector can be processed at high speed in the operation process, and the accuracy of the equipment is improved; the circuit board of the main control board is processed by full-surface mounting, so that the main control board has strong anti-vibration capability, is not easy to loosen, and is stable and reliable; the display device adopts an LED liquid crystal display interface, so that various information on the display device can be more clearly and visually checked; the transformer adopts an isolation transformer, so that electrostatic interference can be avoided, high voltage is isolated, and the use safety of workers is protected; the door 302 is hinged to the cabinet 301 to open or close the cabinet 301.

Further, the door 302 is provided with an observation window 303, and the observation window 303 corresponds to the display device in the box 301, so that the display device can be observed when the door 302 is in a closed state. The observation window 303 can be made of toughened glass, so that foreign matters can be prevented from falling off in the working process and damaging the observation window and equipment in the box body.

Optionally, a door handle with a safety lock may be disposed on the door body 302 to prevent a safety accident caused by a mistake touch of a non-operator in a non-working condition. The master control box 300 can be made of all metal materials, and components in the box body can be effectively protected.

The door handle can be wrapped by bakelite rubber, insulating paint and green-shell paper, so that the risk of electric shock of workers in the working process can be prevented; the outer surface of the all-metal material of the main control box 300 may be coated with waterproof paint such as polyurethane paint, acrylic paint, polymer cement-based paint, etc. to perform waterproof treatment inside the main control box 300, thereby protecting the internal devices.

Specifically, as shown in fig. 10, the machine body 201 may further be provided with a fixing portion 203, the housing 400 is provided with an engaging portion 402, the fixing portion 203 is disposed between the conveyor belts 202 as the conveyor belts 202 rotate around the machine body, and the fixing portion 203 and the engaging portion 402 are engaged with each other, so that the metal detector can detect the material on the conveyor belts. Through this kind of mode of setting up, can make the metal detector be close to the one side that is used for transporting the material in the conveyor belt more, make metal detector and the material that detects more be close to be favorable to promoting metal detector's precision. In addition, in the operation process of the equipment, when the belt conveyor vibrates, the metal to be detected 100 may fall below the material, so that the metal to be detected 100 is closer to the conveying belt 202, the distance between the metal to be detected 100 and the metal detector is further shortened, and the accuracy of the metal detector is further improved.

Alternatively, the fitting manner of the fitting portion 402 and the fixing portion 203 may be a bolt connection, a pin connection, a plug connection, or other fixing connection manner, so that the metal detector is fixed on the belt conveyor. The stainless steel material can be selected for use to cooperation portion 402 and fixed part 203, when guaranteeing joint strength between cooperation portion 402 and the fixed part 203, still has certain corrosion resistance, increases life to reduce the not firm problem of connection that the connecting piece damage brought.

Where not mentioned in this application, can be accomplished using or referencing existing technology.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. The flat-plate type metal detector is applied to a belt conveyor, and is characterized in that the metal detector is positioned below a conveying belt of the belt conveyor and comprises a transmitting coil, a receiving coil and an insulating plate for fixing the transmitting coil and the receiving coil; the transmitting coil and the receiving coil are located in the same horizontal plane, and the receiving coil is symmetrically arranged on the inner side of the transmitting coil along the axis of the transmitting coil.

2. The flat bed metal detector applied to a belt conveyor of claim 1 wherein the number of said transmitting coils is one, the number of said receiving coils is two, and two identical said receiving coils are symmetrically disposed along the axis of said transmitting coils.

3. The flat panel metal detector for a belt conveyor of claim 1, further comprising a housing having a mounting cavity, wherein the insulating plate is located in the mounting cavity, and wherein a filling gap is formed between the insulating plate and an inner wall of the housing.

4. The flat plate metal detector for belt conveyors of claim 3, wherein the filling gap is provided with a filler for isolating an electric field and/or a magnetic field between the insulating plate and the case.

5. The flat plate metal detector applied to a belt conveyor as claimed in claim 3, wherein the belt conveyor includes a body and a conveyor belt capable of rotating around the body, the body is provided with a fixing portion, the housing is provided with a fitting portion, and the fitting portion is fitted with the fixing portion so that the metal detector is located between the conveyor belts and detects the material located on the conveyor belts.

6. The flat metal detector according to claim 5, wherein the belt conveyor further comprises a plurality of support rollers disposed on the body and extending upward, and the plurality of support rollers are uniformly distributed along a length direction of the body to support and guide the conveyor belt.

7. The flat plate type metal detector applied to a belt conveyor as claimed in claim 6, wherein the bottom of the housing is provided with a non-slip pad for elevating a frictional force between the metal detector and the body.

8. The flat panel metal detector for a belt conveyor of claim 7 further comprising a master box located at an end of said housing and having a gap between a sidewall of said master box and an edge of said conveyor belt when said metal detector is in an assembled position with said body.

9. The flat plate type metal detector applied to the belt conveyor as claimed in claim 8, wherein the main control box comprises a box body and a door body for opening and closing the box body, and a main control board, a power supply, a transformer and a display device which are connected are arranged in the box body; the door body is hinged with the box body and used for opening or closing the box body.

10. The flat plate type metal detector applied to a belt conveyor as claimed in claim 9, wherein the door body is provided with an observation window corresponding to the display device.

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