A contamination isolation hood for a metal detection apparatus

Abstract

The utility model relates to metal detection auxiliary equipment technical field, and disclose a kind of pollution isolation cover of metal detection equipment, including isolation cover main part, the isolation cover main part is the hollow cuboid of one end opening, and inner wall is attached with copper foil shielding layer.The pollution isolation cover of metal detection equipment, by adopting the isolation cover main part and shielding door of permalloy material, cooperate the copper foil shielding layer attached to inner wall, double electromagnetic protection structure is constructed, permalloy has excellent shielding ability to low-frequency magnetic field, copper foil shielding layer can high-efficiency block high-frequency electromagnetic signal, in addition, the conductive connection formed when metal contact one and metal contact two in shielding door close, make the entire isolation cover form a complete, continuous electromagnetic shield, can all-around block the electromagnetic interference generated by outside motor, high-frequency equipment etc., ensure that metal detection equipment works in stable electromagnetic environment, significantly improve the detection precision and the reliability of result.

Description

Technical Field

[0001] This utility model relates to the technical field of metal detection auxiliary equipment, specifically a contamination isolation cover for metal detection equipment. Background Technology

[0002] Metal detection equipment is widely used in industrial production, food processing, and pharmaceutical manufacturing to detect metal impurities mixed in products, thereby ensuring product quality and safety.

[0003] However, these devices are often in complex electromagnetic environments, surrounded by various electromagnetic radiation sources such as motors, transformers, and high-frequency welding equipment. The low-frequency magnetic fields and high-frequency electromagnetic signals generated by these radiation sources can easily interfere with the core components of metal detection equipment, such as the detection coils and signal processing circuits, leading to reduced detection accuracy, misjudgments, and missed detections, which seriously affects product quality control.

[0004] Therefore, we need to provide a contamination shield for metal detection equipment with good shielding effect. Utility Model Content

[0005] Technical problems to be solved

[0006] The purpose of this invention is to provide a contamination isolation cover for metal detection equipment, so as to solve the problem mentioned in the background art that metal detection equipment is easily interfered with by low-frequency magnetic fields and high-frequency electromagnetic signals in complex electromagnetic environments.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a contamination isolation cover for a metal detection device, comprising an isolation cover body, wherein the isolation cover body is a hollow cuboid with one open end, and a copper foil shielding layer is attached to the inner wall. The surface of the copper foil shielding layer is coated with an insulating and anti-corrosion coating. A shielding door is connected to the opening of the isolation cover body by a hinge. Both the shielding door and the isolation cover body are made of permalloy, and the inner side is also attached with a copper foil shielding layer. Multiple metal contacts are provided on the edge of the opening of the isolation cover body. The metal contacts are electrically connected to the copper foil shielding layer on the inner wall of the isolation cover body by conductive adhesive. Conductive foam is provided on the contact surface between the shielding door and the isolation cover body. Metal contacts are embedded inside the conductive foam at positions corresponding to the metal contacts.

[0009] As a further improvement to the above solution, the main body of the isolation cover has symmetrical installation openings on both sides, and double-layered laminated electromagnetic shielding glass is installed in the installation openings.

[0010] As a further improvement to the above solution, the substrate of the double-layer laminated electromagnetic shielding glass is made of high-transmittance optical glass, and a metal mesh is sandwiched between the two layers of glass. The metal mesh is made of nickel mesh and is electrically connected to the copper foil shielding layer of the isolation cover body through conductive adhesive.

[0011] As a further improvement to the above solution, a ventilation pipe is provided through the top of the main body of the isolation cover, and a No. 1 metal shielding mesh is embedded in the inner wall of the ventilation pipe.

[0012] As a further improvement to the above solution, one end of the ventilation duct extends into the interior of the isolation cover body, and the other end is connected to a shielded filter box. The shielded filter box is provided with a HEPA filter and an electromagnetic shielding baffle in sequence along the airflow direction. The electromagnetic shielding baffle adopts a multi-fold structure, and a certain gap space is maintained between the folds of the electromagnetic shielding baffle.

[0013] As a further improvement to the above solution, a fan shield is installed at the end of the shielded filter box away from the ventilation duct, and the fan shield is electrically connected to the shielded filter box.

[0014] As a further improvement to the above solution, an exhaust pipe is connected through one side of the main body of the isolation cover, and a second metal shielding mesh is embedded in the inner wall of the exhaust pipe. Both the first and second metal shielding meshes are made of stainless steel.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The contamination isolation cover of this metal detection equipment, by adopting the isolation cover body and shielding door made of permalloy, combined with the copper foil shielding layer attached to the inner wall, constructs a double electromagnetic protection structure. Permalloy has excellent shielding ability against low-frequency magnetic fields, while the copper foil shielding layer can effectively block high-frequency electromagnetic signals. In addition, the conductive connection formed by metal contact one and metal contact two when the shielding door is closed makes the entire isolation cover form a complete and continuous electromagnetic shield. It can block electromagnetic interference generated by external motors, high-frequency equipment, etc. in all directions, ensuring that the metal detection equipment works in a stable electromagnetic environment, significantly improving the detection accuracy and reliability of the results.

[0017] 2. The contamination isolation cover of this metal detection equipment incorporates conductive foam at the contact surface between the shielding door and the main body of the isolation cover. Utilizing the elastic deformation characteristics of the conductive foam, it can tightly fill the gap between the two after the shielding door is closed. This not only enhances the electromagnetic sealing performance of the contact surface and further improves the overall electromagnetic shielding effect, but also effectively prevents external dust, water vapor, corrosive gases, and other pollutants from entering the interior of the isolation cover through the gaps. At the same time, the conductivity of the conductive foam itself also helps to strengthen the conductive connection between metal contacts, ensuring that the equipment is not contaminated or corroded and extending the service life of the equipment.

[0018] 3. The contamination isolation cover of this metal detection equipment forms a complete heat dissipation system through the installation of ventilation ducts, exhaust ducts, and corresponding metal shielding mesh and shielded filter boxes. The metal shielding mesh on the inner wall of the ventilation ducts and exhaust ducts can block the propagation of electromagnetic signals along the pipes while ensuring air circulation, preventing electromagnetic interference from intruding or leaking through the ventilation channels. The HEPA filter in the shielded filter box can filter the incoming air to prevent dust from contaminating the equipment. The multi-fold electromagnetic shielding baffle further enhances electromagnetic protection. The conductive connection between the fan shield and the shielded filter box also prevents the electromagnetic noise generated by the fan operation from affecting the equipment. While achieving efficient heat dissipation, it perfectly takes into account electromagnetic protection performance, ensuring the long-term stable operation of the equipment. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the main body of the isolation cover of this utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the ventilation duct of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the shielded filter box of this utility model;

[0023] Figure 5 This is a magnified structural diagram showing a partial detail of the metal mesh of this utility model.

[0024] In the diagram: 1. Main body of the isolation enclosure; 2. Copper foil shielding layer; 3. Insulating and anti-corrosion coating; 4. Shielding door; 5. Metal contact one; 6. Conductive foam; 7. Metal contact two; 8. Double-layer laminated electromagnetic shielding glass; 9. Metal mesh; 10. Ventilation duct; 11. Metal shielding mesh No. 1; 12. Shielding filter box; 13. HEPA filter; 14. Electromagnetic shielding baffle; 15. Fan shielding cover; 16. Exhaust duct; 17. Metal shielding mesh No. 2. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 - Figure 5This utility model provides a technical solution: a contamination isolation cover for a metal detection device, including an isolation cover body 1, which is a hollow cuboid with one open end, and a copper foil shielding layer 2 is attached to the inner wall. The surface of the copper foil shielding layer 2 is coated with an insulating and anti-corrosion coating 3. The opening of the isolation cover body 1 is connected to a shielding door 4 by a hinge. Both the shielding door 4 and the isolation cover body 1 are made of permalloy, and the inner side is also attached with a copper foil shielding layer 2. Multiple metal contacts 1 5 are provided on the edge of the opening of the isolation cover body 1. The metal contacts 1 5 are electrically connected to the copper foil shielding layer 2 on the inner wall of the isolation cover body 1 by conductive adhesive. The contact surface between the shielding door 4 and the isolation cover body 1 is provided with conductive foam 6, and metal contacts 2 7 are embedded in the conductive foam 6 at the positions corresponding to the metal contacts 1 5.

[0027] In terms of electromagnetic shielding, the permalloy-material isolation enclosure body 1 and shielding door 4 effectively block low-frequency magnetic fields, while the copper foil shielding layer 2 on the inner wall reflects and absorbs high-frequency electromagnetic signals. The combination of the two forms a double protection. When the shielding door 4 is closed, the first metal contact and the second metal contact are precisely connected. With the sealing effect of the conductive foam 6, the entire isolation enclosure forms a complete conductive circuit, preventing electromagnetic signals from leaking or intruding from gaps. In terms of pollution isolation, the insulating and anti-corrosion coating 3 prevents copper foil oxidation and contaminant corrosion. The conductive foam 6 and the structural sealing design prevent moisture, corrosive gases, etc. from seeping in from the connection points. Multiple protections reduce the impact of contaminants on internal equipment.

[0028] The main body 1 of the isolation enclosure has symmetrical mounting openings on both sides. Double-layered laminated electromagnetic shielding glass 8 is installed within each mounting opening. The substrate of the double-layered laminated electromagnetic shielding glass 8 is high-transmittance optical glass, and a metal mesh 9 is sandwiched between the two layers of glass. The metal mesh 9 is made of nickel mesh and is electrically connected to the copper foil shielding layer 2 of the main body 1 of the isolation enclosure via conductive adhesive. A ventilation pipe 10 is installed through the top of the main body 1 of the isolation enclosure. A first-order metal shielding mesh 11 is embedded in the inner wall of the ventilation pipe 10. One end of the ventilation pipe 10 extends into the interior of the main body 1 of the isolation enclosure, and the other end is connected to… A shielded filter box 12 is connected. Inside the shielded filter box 12, a HEPA filter 13 and an electromagnetic shielding baffle 14 are arranged sequentially along the airflow direction. The electromagnetic shielding baffle 14 adopts a multi-fold structure. A fan shielding cover 15 is installed at the end of the shielded filter box 12 away from the ventilation duct 10, and the fan shielding cover 15 is electrically connected to the shielded filter box 12. An exhaust pipe 16 is connected through one side of the isolation cover body 1. A second metal shielding mesh 17 is embedded in the inner wall of the exhaust pipe 16. Both the first metal shielding mesh 11 and the second metal shielding mesh 17 are made of stainless steel.

[0029] In terms of electromagnetic shielding, the metal mesh 9 and the copper foil shielding layer 2 are electrically connected in the double-layered laminated electromagnetic shielding glass 8 on both sides, ensuring the observation function without compromising the shielding integrity. For pollution isolation, the HEPA filter 13 filters dust particles in the incoming air. In the ventilation and heat dissipation system, the fan inside the fan shielding cover 15 inputs air into the isolation cover through the ventilation pipe 10. The airflow enters through the first metal shielding mesh 11, circulates in the isolation cover, and is discharged from the exhaust pipe 16. The second metal shielding mesh 17 ensures that the electromagnetic shielding does not fail during exhaust. The multi-fold electromagnetic shielding baffle 14 in the shielding filter box 12 extends the airflow path and enhances the blocking of electromagnetic signals. The fan shielding cover 15 is electrically connected to the filter box to avoid electromagnetic noise generated by the fan operation from interfering with the equipment, ultimately achieving efficient operation of the equipment in a stable environment.

[0030] Working Principle: The contamination isolation cover of this metal detection equipment achieves electromagnetic protection and contamination isolation through the synergistic effect of multiple structures. For electromagnetic shielding, the permalloy-material cover body 1 and shielding door 4 effectively block low-frequency magnetic fields, while the copper foil shielding layer 2 on the inner wall reflects and absorbs high-frequency electromagnetic signals. The combination of these two elements creates dual protection. When the shielding door 4 is closed, the first and second metal contacts precisely connect, and with the sealing effect of the conductive foam 6, the entire isolation cover forms a complete conductive circuit, preventing electromagnetic signals from leaking or intruding through gaps. In the double-layered laminated electromagnetic shielding glass 8 on both sides, the metal mesh 9 is conductively connected to the copper foil shielding layer 2, ensuring observation functionality without compromising shielding integrity. For contamination isolation, the insulating and anti-corrosion coating 3 prevents oxidation of the copper foil. To prevent corrosion and contaminant erosion, the HEPA filter 13 filters dust particles from the incoming air. The conductive foam 6 and structural sealing design prevent moisture and corrosive gases from seeping in through the joints. Multiple protections reduce the impact of contaminants on internal equipment. In the ventilation and heat dissipation system, the fan inside the fan shield 15 inputs air into the isolation cover through the ventilation pipe 10. The airflow enters through the first metal shield 11, circulates within the isolation cover, and is discharged from the exhaust pipe 16. The second metal shield 17 ensures that the electromagnetic shield does not fail during exhaust. The multi-fold electromagnetic shielding baffle 14 inside the shielded filter box 12 extends the airflow path and enhances the blocking of electromagnetic signals. The fan shield 15 is electrically connected to the filter box to avoid electromagnetic noise generated by the fan operation from interfering with the equipment, ultimately enabling the equipment to operate efficiently in a stable environment.

[0031] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A contamination isolation cover for a metal detection device, comprising an isolation cover body (1), characterized in that: The main body (1) of the isolation cover is a hollow cuboid with one end open. A copper foil shielding layer (2) is attached to the inner wall. The surface of the copper foil shielding layer (2) is coated with an insulating and anti-corrosion coating (3). The opening of the main body (1) of the isolation cover is connected to the shielding door (4) by a hinge. Both the shielding door (4) and the main body (1) of the isolation cover are made of permalloy. The inner side is also attached with a copper foil shielding layer (2). Multiple metal contacts (5) are provided on the edge of the opening of the main body (1). The metal contacts (5) are electrically connected to the copper foil shielding layer (2) on the inner wall of the main body (1) of the isolation cover by conductive adhesive. Conductive foam (6) is provided on the contact surface between the shielding door (4) and the main body (1) of the isolation cover. Metal contacts (7) are embedded in the conductive foam (6) at the position corresponding to the metal contacts (5).

2. The contamination isolation cover of a metal detection device according to claim 1, characterized in that: The main body of the isolation cover (1) has symmetrical installation openings on both sides, and double-layered laminated electromagnetic shielding glass (8) is installed in the installation openings.

3. The contamination isolation cover of a metal detection device according to claim 2, characterized in that: The substrate of the double-layer laminated electromagnetic shielding glass (8) is optical glass with high light transmittance, and a metal mesh (9) is sandwiched between the double-layer glass. The metal mesh (9) is made of nickel mesh and is electrically connected to the copper foil shielding layer (2) of the isolation cover body (1) through conductive adhesive.

4. The contamination isolation cover of a metal detection device according to claim 1, characterized in that: The top of the isolation cover body (1) is provided with a ventilation pipe (10), and the inner wall of the ventilation pipe (10) is embedded with a No. 1 metal shielding mesh (11).

5. The contamination isolation cover of a metal detection device according to claim 4, characterized in that: One end of the ventilation duct (10) extends into the interior of the isolation cover body (1), and the other end is connected to a shielded filter box (12). The shielded filter box (12) is provided with a HEPA filter (13) and an electromagnetic shielding baffle (14) in sequence along the airflow direction. The electromagnetic shielding baffle (14) adopts a multi-fold structure.

6. The contamination isolation cover of a metal detection device according to claim 5, characterized in that: The shielded filter box (12) is equipped with a fan shield (15) at the end away from the ventilation pipe (10), and the fan shield (15) is electrically connected to the shielded filter box (12).

7. The contamination isolation cover of a metal detection device according to claim 4, characterized in that: One side of the isolation cover body (1) is connected to an exhaust pipe (16), and the inner wall of the exhaust pipe (16) is embedded with a second metal shielding mesh (17). Both the first metal shielding mesh (11) and the second metal shielding mesh (17) are made of stainless steel.

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