CN105911601A - Antistatic metal detection device - Google Patents

Abstract

An anti-static metal detection device, including a material conveying pipeline, a non-metallic coil fixing sleeve, a transmitting coil and a receiving coil, the transmitting coil and two receiving coils are wound on the outer surface of the non-metallic coil fixing sleeve, and the transmitting coil It is arranged between two receiving coils, and the two receiving coils are connected in series, and the material conveying pipeline is an antistatic non-metal wear-resistant compound containing graphite powder. It can be divided into combined structure or integral tubular structure. It can eliminate the static electricity generated by the cotton flow when it flows through the metal detection device, fundamentally eliminate the source of static electricity interference, improve the detection accuracy of the metal detector, reduce false detection and misjudgment, and ensure normal production. Avoid contact between static electricity and raw materials, eliminate fire hazards, and ensure safe production.

Description

An anti-static metal detection device

【Technical field】

The invention relates to a metal detection device, in particular to an antistatic metal detection device.

【Background technique】

In the production process of cotton spinning, chemical industry, pharmaceutical and other industries, materials such as fibers, powders, and particles need to be conveyed through pneumatic conveying pipelines. During the process of pneumatic conveying, it is necessary to detect and remove metal impurities in the materials in time , to prevent damage to production equipment, but also to eliminate static sparks in the delivery pipeline to prevent accidental fires and eliminate potential safety hazards to the greatest extent. Therefore, the existing material conveying pipes all use metal pipes to eliminate static electricity in the conveying pipes and prevent fires. At the same time, metal detectors must be added in the material conveying pipes to detect and remove metal impurities in the materials in time. , to prevent metal impurities from damaging the production equipment, and prevent accidental fires caused by sparks caused by friction between metal impurities and the inner wall of the metal delivery pipe, metal equipment, etc.

The metal detector is set on the material conveying pipeline. In the metal detector, the material conveying pipeline must be a non-metallic pipe body, otherwise it will not work.

Existing metal detector is shown in Figure 1, and it comprises material conveying pipeline 1, non-metallic coil fixing sleeve 2, transmitting coil 3 and receiving coil 4, and transmitting coil 3 and two receiving coils 4 are all wound on non-metallic coil On the outer surface of the fixed sleeve 2, the transmitting coil 3 is arranged between two receiving coils 4, and the two receiving coils 4 are connected in series, wherein the material conveying pipeline 1 is an insulating non-metal wear-resistant material.

In the process of actual use, when the material passes through the non-metallic material conveying pipeline 1 at high speed, it is easy to quickly rub against the inner wall of the non-metallic material conveying pipeline 1 to generate a large amount of static electricity, and these static electricity adhere to the inner wall of the non-metallic material conveying pipeline 1 , will seriously interfere with the normal operation of the metal detector’s transmitting coil 3 and receiving coil 4, resulting in misdetection and misjudgment, causing frequent alarms or false alarms of the metal detector, causing the metal detector to lose its detection, alarm and miscellaneous functions, often causing The interruption of production affects the production of the entire production line, delays the production progress, and brings great economic losses to the company; at the same time, because the raw materials transported are flammable, a large amount of static electricity attached to the inner wall of the pipeline or the inner wall of the barrel is prone to sparks. Ignite the material and cause a fire. Since the material moves in the conveying pipeline under the pressure of high pressure, the material on fire will explode under the high pressure condition, which not only seriously threatens the personal safety of the production personnel, but also is a great safety hazard for the production enterprise. Hidden dangers will lead to unpredictable consequences. Therefore it is imminent to develop an anti-static metal detector.

Invention content:

The purpose of the present invention is to provide an anti-static metal detection device, which can eliminate the static electricity generated when the material flows through the metal detection device, fundamentally eliminate the static interference source, and greatly improve the working accuracy of the metal detector , reduce mistesting and misjudgment, ensure the normal production of the entire production line, and at the same time avoid static sparks from igniting raw materials and eliminate potential safety hazards.

The present invention adopts following technical scheme to realize:

An anti-static metal detection device includes a material conveying pipeline, a non-metallic coil fixing sleeve, a transmitting coil and a receiving coil. Both the transmitting coil and the two receiving coils are wound on the outer surface of the non-metallic coil fixing sleeve, and the transmitting coil It is arranged between two receiving coils, and the two receiving coils are connected in series. It is characterized in that: the material conveying pipeline includes a non-metallic supporting outer pipe and a material conveying inner pipe, and the material conveying inner pipe is arranged in a non-metallic supporting outer pipe, and the material conveying The material of the inner tube is an antistatic non-metal wear-resistant compound containing graphite powder.

Further, the non-metallic supporting outer pipe and the material conveying inner pipe are fixedly connected as a whole through an inlaid engagement structure.

Furthermore, the material conveying inner pipe is arranged on the inner surface of the non-metallic supporting outer pipe by means of coating and curing.

Further, the material of the non-metallic supporting outer pipe is the same as that of the material conveying inner pipe.

Further, the antistatic non-metal wear-resistant compound contains graphite powder and non-metal material, and the weight ratio of graphite powder to non-metal material is 1:3˜1:6.

Further, the non-metallic material is epoxy resin.

Further, a sealed connection structure docked with the material conveying pipe is provided at both ends of the material conveying pipe.

Furthermore, the sealing connection structure is as follows: an axial connecting flange is provided at both ends of the material conveying pipe, and the axial connecting flange is in sealing connection with the end surface of the material conveying pipe.

Furthermore, the sealing connection structure is as follows: the two ends of the material conveying pipeline are provided with shoulders for installing metal flanges, the metal flanges are sealed and installed on the shoulders, and the metal flanges are sealed and connected with the end faces of the cotton conveying pipes.

In the existing anti-static metal detectors, the material conveying pipes are made of epoxy materials. When the materials pass through the non-metallic material conveying pipes at high speed, a large amount of static electricity will be generated, and these are attached to the non-metallic material conveying pipes. The static electricity on the inner wall will seriously interfere with the normal operation of the transmitting coil and receiving coil of the metal detector, resulting in misdetection and misjudgment of the metal detector, and either frequent alarms or false alarms, which may cause fires in severe cases. The innovative design uses the mixture of epoxy resin and graphite powder to make non-metallic material conveying pipes. Since the graphite powder evenly distributed on the surface of the inner hole of the material conveying pipe is a non-metallic conductor, it has good conductivity. When the material is in During the high-speed flow of the inner hole surface of the material conveying pipeline, the static electricity generated by the friction on the inner hole surface will be released in time, and no electric sparks will be generated, let alone unexpected interfering electromagnetic waves, thus ensuring that the transmitting coil and the receiving coil are in good condition. Normal operation in an environment without electromagnetic interference ensures the normal operation of the entire metal detection device, improves the detection accuracy of the metal detector, and eliminates various safety hazards caused by static electricity.

Description of drawings:

Fig. 1 is the structural representation of prior art;

Fig. 2 is a structural representation of the present invention;

Fig. 3 is a schematic structural view of a partial cross-section of the side walls with connecting flanges at both ends of the material conveying pipeline in the present invention, wherein the non-metallic support outer pipe and the material conveying inner pipe are fixedly connected as a whole through an inlaid occlusal structure;

Fig. 4 is another schematic structural view of the partial cross-section of the side walls with connecting flanges at both ends of the material conveying pipeline in the present invention, wherein the non-metallic support outer pipe and the material conveying inner pipe have a homogeneous and integrated structure;

Fig. 5 is a schematic structural view of a partial cross-section of the side walls with shoulders at both ends of the material conveying pipeline in the present invention, wherein the non-metallic supporting outer pipe and the material conveying inner pipe are fixedly connected together through an inlaid occlusal structure;

Fig. 6 is another schematic structural view of the partial cross-section of the side walls with shoulders at both ends of the material conveying pipeline in the present invention, wherein the non-metallic supporting outer pipe and the material conveying inner pipe have a homogeneous and integrated structure;

Fig. 7 is the working principle figure of metal detector among the present invention;

In the figure: 1-material conveying pipe; 2-non-metal coil fixing sleeve; 3-transmitting coil; 4-receiving coil; 5-material conveying metal pipe; 6-sealed connection structure; 7-metal flange; 11-non-metal Supporting outer pipe; 12-material conveying inner pipe; 13-axial connecting flange; 14-shaft shoulder.

detailed description

The specific embodiment of the present invention is described below in conjunction with accompanying drawing:

Embodiment 1: An antistatic metal detection device, as shown in Figures 2 and 3, includes a material conveying pipeline 1, a non-metallic coil fixing sleeve 2, a transmitting coil 3 and a receiving coil 4, and the transmitting coil 3 and two receiving coils 4 are all wound on the outer surface of the non-metallic coil fixing sleeve 2, and the transmitting coil 3 is arranged between two receiving coils 4, and the two receiving coils 4 are connected in series, and the material conveying pipeline 1 includes a non-metallic supporting outer tube 11 and the material conveying inner pipe 12, the material conveying inner pipe 12 is arranged in the non-metallic supporting outer pipe 11, and the non-metallic supporting outer pipe 11 and the material conveying inner pipe 12 are fixedly connected together through an inlaid occlusal structure. The material of the supporting outer tube 11 is cured epoxy resin or nylon plastic, and the material of the material conveying inner tube 12 is an antistatic non-metal wear-resistant compound containing graphite powder, and the antistatic wear-resistant compound contains graphite Powder and epoxy resin, the weight ratio of graphite powder and epoxy resin is 1:4, and the two ends of the material conveying pipeline 1 are provided with a sealing connection structure 6 docked with the material conveying metal pipe 5, that is, in the material conveying pipeline 1 There are axial connecting flanges 13 at both ends, and the axial connecting flanges 13 are in sealing connection with the end faces of the material conveying metal pipes 5 .

Embodiment 2: In Embodiment 1, the material of the non-metallic support outer pipe 11 is changed to the same material as the material conveying inner pipe 12, so that the non-metallic supporting outer pipe 11 and the material conveying inner pipe 12 become an integrated pipe body.

Embodiment 3: In embodiment 1, the inner tube 12 of material delivery is a cured layer obtained by coating on the inner surface of the non-metallic support outer tube 11 with epoxy resin, so that the inner tube 12 of material delivery is both smooth and durable. Grinding performance, but also can automatically eliminate static electricity.

Embodiment 4: In Embodiment 1, the sealing connection structure 6 is changed to: a shaft shoulder 14 is provided at both ends of the material conveying pipeline 1, and the metal flange 7 is sealed and installed on the shaft shoulder 14, and the metal flange 7 is connected to the material The end faces of the conveying metal pipe 5 are sealed and connected, so that the amount of graphite powder can be reduced, the production process can be simplified, and the static electricity on the material conveying pipe 1 can be released through the material conveying metal pipe 5 .

There are many embodiments in this embodiment, as long as the static electricity is eliminated by adding graphite powder in the material conveying pipeline 1, all schemes belong to the protection scope of the present invention.

Claims (10)

1. an Antistatic type metal detecting device, including material conveying pipe (1), nonmetal coil admittedly Fixed set (2), transmitting coil (3) and receiving coil (4), transmitting coil (3) and two receiving coils (4) all it is wound on the outer surface of nonmetal coil fixed cover (2), and transmitting coil (3) is arranged on two Between individual receiving coil (4), two receiving coil (4) series connection, it is characterized in that: described Material pipeline Road (1) includes nonmetal supporting outer tube (11) and material conveying inner tube (12), material conveying inner tube (12) Being arranged in nonmetal supporting outer tube (11), the material of material conveying inner tube (12) is to comprise graphite powder The nonmetal wear-resisting complex of antistatic.

The most according to claim 1, Antistatic type metal detecting device, is characterized in that: outside nonmetal supporting Between pipe (11) and material conveying inner tube (12), by inlaying, occlusion structure is fixing to be integrally connected.

The most according to claim 1, Antistatic type metal detecting device, is characterized in that: material conveying inner tube (12) inner surface of nonmetal supporting outer tube (11) it is arranged on by coating curing mode.

The most according to claim 1, Antistatic type metal detecting device, is characterized in that: described nonmetal The material holding outer tube (11) is epoxy resin cured product or nylon plastic(s).

The most according to claim 1, Antistatic type metal detecting device, is characterized in that: described nonmetal The material holding outer tube (11) is identical with the material of material conveying inner tube (12), and both are integrated.

The most according to claim 1, Antistatic type metal detecting device, is characterized in that: described antistatic is non- Abrasion-resistant metal complex comprises the weight ratio of graphite powder and nonmetallic materials, graphite powder and nonmetallic materials For 3:1～6:1.

The most according to claim 5, Antistatic type metal detecting device, is characterized in that: described non-metallic material Material is epoxy resin.

The most according to claim 1, Antistatic type metal detecting device, is characterized in that: at Material pipeline The two ends in road (1) are provided with the Hermetical connecting structure (6) docked with cotton feeding pipe (5).

The most according to claim 8, Antistatic type metal detecting device, is characterized in that: described in be tightly connected Structure (6) is: is provided with axial adpting flange (13) at the two ends of material conveying pipe (1), axially connects Acting flange (13) is connected with the end face seal of cotton feeding pipe (5).

The most according to claim 8, Antistatic type metal detecting device, is characterized in that: the described company of sealing Access node structure (6) is: be provided with the shaft shoulder (14) installing metal flange (7) at the two ends of material conveying pipe (1), Metal flange (7) is sealingly mounted on the shaft shoulder (14), metal flange (7) and the end face of cotton feeding pipe (5) It is tightly connected.