Electromagnetic shielding sleeve

Abstract

The utility model relates to an electromagnetic shielding sleeve, which comprises a Soney magnetoscale arranged on a rolling mill, a shielding sleeve is arranged outside the Soney magnetoscale, the shielding sleeve comprises a channel steel frame, and three copper plate layers are arranged on the other surfaces except the front surface and the bottom surface of the channel steel frame from inside to outside. Aluminum plate layers are further arranged on the outer sides of the copper plates on the two side faces and the rear face of the channel steel frame. The device is simple in structure and reasonable in design, the shielding sleeve is arranged to protect the Soney magnetoscale, electromagnetic interference of an edge heating system of the rolling mill is prevented, the problem of electromagnetic signal interference is solved, and the equipment stability performance is improved.

Description

Technical Field

[0001] The utility model relates to an electromagnetic shielding sleeve. Background Art

[0002] A rolling mill is a device for processing metal sheets. In the prior art, a side heating system and a Sony magnetic scale are installed on the rolling mill to locally heat the rollers. The side heating system uses electromagnetic induction heating. The principle of induction heating is to generate an alternating current, thereby generating an alternating magnetic field. The alternating current is used to pass through the coil to generate an alternating magnetic field with a constantly changing direction. Eddy currents will appear inside the conductor in the alternating magnetic field. The eddy electric field drives the carriers in the conductor to move. The Joule heating effect of the eddy currents heats up the conductor, thereby heating the rollers. The Sony magnetic scale is an important device for detecting and controlling the side guide plate stroke of the rolling mill. During the rolling process, In the process, Sony magnetic scale is used to detect the stroke of the side guide plate to prevent the aluminum from moving during the rolling process, ensuring the stability of the rolling process and the quality of the product. Sony magnetic scale uses the principle of electromagnetic induction and consists of a magnetic needle and a reading head. It generates a "starting pulse" driven by a power supply. The pulse propagates along the wire to form a spiral magnetic field. The spiral magnetic field meets the magnetic field generated by the magnetic ring to produce a magnetostrictive effect (also called mechanical wave); the mechanical wave propagates at a constant speed toward the direction of the electronic warehouse and the end of the measuring rod. The enabling mechanism in the electronic warehouse receives the mechanical wave and converts it into a weak electrical signal. The circuit processes the weak signal to form an "end pulse", and the displacement is output after calculation.

[0003] In summary, the edge heating system of the rolling mill adopts electromagnetic induction heating. When the heating head is powered on, a magnetic field induction is generated around it. Since the Sony magnetic scale adopts the same principle, if the magnetism is strong, the strong magnetic field will affect the weak magnetic field. When the electromagnetic induction heating is turned on, a magnetic flux change is generated around the heating head. As the magnetic flux cycle changes during the operation of the Sony magnetic scale, the normal magnetic flux cycle of the Sony magnetic scale is affected. The signal of the Sony magnetic scale is subject to electromagnetic interference from the edge heating system, resulting in the MD20B signal receiver receiving abnormal values, which ultimately leads to an abnormal module alarm. After resetting, due to abnormal value reception, the values ​​on both sides of the roll gap of the rolling mill are abnormally out of sync, and the actual value of the hydraulic pressure is wrong, resulting in the inability to continue rolling, affecting the strip thickness control, affecting the working efficiency and product quality of the rolling mill. Utility Model Content

[0004] The utility model improves the above-mentioned problem, that is, the technical problem to be solved by the utility model is to provide an electromagnetic shielding sleeve, through which the Sony magnetic ruler is shielded and protected to avoid electromagnetic interference of the edge heating system of the rolling mill and affect the operation of the rolling mill.

[0005] The utility model is constructed as follows: it comprises a Sony magnetic scale arranged on a rolling mill, a shielding sleeve is arranged on the outside of the Sony magnetic scale, the shielding sleeve comprises a channel steel frame, three layers of copper plates are arranged on the remaining surfaces except the front surface and the bottom surface of the channel steel frame from the inside to the outside, and aluminum plates are also arranged on the outer sides of the copper plates on the two side surfaces and the rear of the channel steel frame.

[0006] Furthermore, the three-layer copper plate includes a first copper plate layer, a second copper plate layer and a third copper plate layer which are sequentially arranged from the inside to the outside.

[0007] Furthermore, a shielding space for accommodating the Sony magnetic scale is provided inside the shielding sleeve, and the front and bottom surfaces of the shielding sleeve are both open, the front surface of the shielding sleeve is used to face the frame of the rolling mill, and the bottom surface of the shielding sleeve is used for the cable of the Sony magnetic scale to pass through.

[0008] Furthermore, the tops of the three copper plate layers of the shielding sleeve are all provided with through holes, and the frame of the rolling mill is provided with threaded holes, and the through holes and the threaded holes are coaxially arranged and fastened with bolts.

[0009] Furthermore, the cable of Sony magnetic ruler adopts twisted pair cable.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the device has a simple structure and a reasonable design. By putting a shielding sleeve on the outside of the Sony magnetic scale, the open front of the shielding sleeve is closed with the frame of the rolling mill, and the bottom of the shielding sleeve is used to avoid the cables of the Sony magnetic scale. The three layers of copper plates and one layer of aluminum plates of the shielding sleeve provide integrated shielding protection for the Sony magnetic scale to avoid electromagnetic interference from the edge heating system of the rolling mill, which causes the MD20B signal receiver to receive erroneous signals and affects the operation of the rolling mill. The device solves the problem of electromagnetic signal interference and improves the stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the installation structure of an embodiment of the utility model;

[0012] Figure 2 This is a front structural cross-sectional view of the shielding sleeve of the embodiment of the utility model;

[0013] Figure 3 This is a side structural cross-sectional view of the shielding sleeve of the embodiment of the utility model;

[0014] Figure 4 It is a top view of an embodiment of the utility model. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0016] Example: Figures 1 to 4As shown, in this embodiment, an electromagnetic shielding sleeve is provided, including four Sony magnetic scales 2 arranged on a rolling mill 1, and a shielding sleeve 3 is arranged on the outside of each Sony magnetic scale, and the shielding sleeve includes a channel steel frame 31, and the remaining surfaces except the front surface and the bottom surface of the channel steel frame are provided with three layers of copper plates from the inside to the outside, and the outer sides of the copper plates on the two side surfaces and the back of the channel steel frame are also provided with aluminum plates 32; by putting the shielding sleeve on the outside of the Sony magnetic scale, three layers of copper plates and one layer of aluminum plates are arranged to provide an integral shielding protection for the Sony magnetic scale, so as to avoid signal interference, which may cause the MD20B signal receiver to receive an erroneous signal and affect the operation of the rolling mill.

[0017] This design can shield the influence of electromagnetic waves generated by the edge heating system of the rolling mill on the Sony magnetic scale. No interference occurs during use, ensuring the stability of the hydraulic system and the roll gap, solving the problem of electromagnetic signals plaguing the equipment and improving the stability of the equipment.

[0018] In the embodiment of the utility model, the three-layer copper plate includes a first copper plate layer 33, a second copper plate layer 34 and a third copper plate layer 35 which are sequentially arranged from the inside to the outside.

[0019] The material of the aluminum plate layer may be aluminum foil, and the material of the copper plate may be copper foil.

[0020] In the embodiment of the utility model, a shielding space 36 for accommodating the Sony magnetic scale is provided inside the shielding sleeve, and the front and bottom surfaces of the shielding sleeve are both open. The front surface of the shielding sleeve is used to face the frame of the rolling mill, and the front surface of the shielding sleeve is against the frame of the rolling mill, and can form a closure with the frame of the rolling mill, so there is no need to set a cover, and the bottom surface of the shielding sleeve is used for the cable of the Sony magnetic scale to pass through.

[0021] In an embodiment of the utility model, through holes 37 are provided on the tops of the three copper plate layers of the shielding sleeve, and threaded holes are provided on the frame of the rolling mill. Specifically, the threaded holes are provided on the bracket 11 on the frame side, and the through holes are coaxially arranged with the threaded holes and fastened with bolts 38.

[0022] In the embodiment of the utility model, the cable of the Sony magnetic ruler adopts a twisted pair cable 4; compared with the traditional data transmission cable, the gap on the surface of the twisted pair cable is smaller and the shielding density of the twisted pair cable is greater.

[0023] In the embodiment of the utility model, a magnetic ring is further provided at the connection between the twisted pair cable and the corresponding equipment, and the magnetic ring has an anti-interference function.

[0024] In the embodiment of the utility model, the utility model designs a device to avoid mutual interference between electromagnetic signals by starting from the edge heating system and the working principle of Sony magnetic ruler, solves the problem of electromagnetic signals bothering the equipment and improves the stability of the equipment.

[0025] Unless otherwise stated, any technical solution disclosed in the above utility model, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many feasible numerical values. Since there are too many numerical values ​​to be exhaustive, the utility model discloses only some numerical values ​​to illustrate the technical solution of the utility model, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the utility model.

[0026] If the words "first", "second" and so on are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above words have no special meaning.

[0027] At the same time, if the above-mentioned utility model discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0028] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0029] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated forming process.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. An electromagnetic shielding sleeve, characterized in that: It includes a Sony magnetic scale arranged on a rolling mill, wherein a shielding sleeve is arranged on the outside of the Sony magnetic scale, and the shielding sleeve includes a channel steel frame, and three layers of copper plates are arranged on the remaining surfaces except the front surface and the bottom surface of the channel steel frame from the inside to the outside, and aluminum plates are also arranged on the outer sides of the copper plates on the two side surfaces and the rear of the channel steel frame.

2. The electromagnetic shielding sleeve according to claim 1, characterized in that: The three-layer copper plate includes a first copper plate layer, a second copper plate layer and a third copper plate layer which are arranged in sequence from the inside to the outside.

3. The electromagnetic shielding sleeve according to claim 1, characterized in that: A shielding space for accommodating the Sony magnetic scale is provided inside the shielding sleeve. The front and bottom surfaces of the shielding sleeve are both open. The front surface of the shielding sleeve is used to face the frame of the rolling mill, and the bottom surface of the shielding sleeve is used for the cable of the Sony magnetic scale to pass through.

4. The electromagnetic shielding sleeve according to claim 1, characterized in that: The tops of the three copper plate layers of the shielding sleeve are all provided with through holes, and the frame of the rolling mill is provided with threaded holes. The through holes and the threaded holes are coaxially arranged and fastened with bolts.

5. The electromagnetic shielding sleeve according to claim 1, characterized in that: Sony magnetic ruler cables use twisted pair cables.

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