Electromagnetic shielding wire duct of building structure and construction method of electromagnetic shielding wire duct

Abstract

The invention discloses an electromagnetic shielding wire duct of a building structure and a construction method thereof, and the electromagnetic shielding wire duct comprises a steel reinforced concrete groove body constructed on the building structure, a wire box installed in the steel reinforced concrete groove body, a metal shielding net covering an opening of the wire box, and a grounding wire connected to the metal shielding net. A plurality of diagonal bracings which are horizontally supported at the opening of the wire box are arranged below the metal shielding net, and a wire duct cover plate is arranged above the metal shielding net. Electromagnetic signals can be shielded, electromagnetic interference can be avoided, the signal transmission quality of wires and cables in the trunking can be improved, the structural strength of the trunking can be improved, the structural deformation of the trunking can be reduced, the risk that the trunking is damaged can be reduced, and externally input current and voltage signals can be released; therefore, safety protection is carried out on electric wires and cables in the wire duct from a plurality of angles.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to an electromagnetic shielding cable duct of a building structure and a construction method thereof. Background Art

[0002] With the rapid development of electronic technology, electromagnetic interference (EMI) and electromagnetic compatibility (EMC) issues have become increasingly prominent. In particular, in data processing centers, communication base stations, medical equipment and other places that are sensitive to the electromagnetic environment, it is crucial to effectively manage and shield the electromagnetic interference generated by wires and cables. In construction projects, the wires and cables of electronic and electrical equipment are usually installed through cable ducts constructed on the building structure and transmit useful signals over long distances. The electromagnetic interference generated by the electronic and electrical equipment and the wires and cables connected to them not only affects the normal operation of the electronic and electrical equipment itself and other electronic and electrical equipment radiated by its electromagnetic signals, but also has adverse effects on human health. In addition, since the structure of the cable duct is usually: a trough body is opened on the building structure, and a wire box is installed in the trough body. The structural strength of the trough body and the wire box is weak. When subjected to large loads or external forces such as wind pressure and earthquakes, the cable duct is prone to structural deformation or damage, which may cause the wires and cables therein to be damaged, resulting in leakage and circuit breakage. In addition, the above-mentioned cable duct is affected by strong currents such as lightning, external voltage input, or unstable currents generated by poor contact of wires and cables, resulting in damage to wires, cables and cable ducts. Summary of the invention

[0003] The object of the present invention is to provide an electromagnetic shielding cable trough for a building structure and a construction method thereof, so as to solve the problem that the cable trough installed with wires and cables is susceptible to interference from electromagnetic signals, which affects the normal operation of the electronic and electrical equipment connected thereto and the adverse effects of electromagnetic radiation on human health; the cable trough has weak structural strength and is prone to structural deformation or damage, resulting in poor protection of the wires and cables therein and causing magnetic leakage or short circuit; and the cable trough and the wires and cables therein are susceptible to external current or voltage input and poor access, resulting in the cable trough and the wires and cables therein being susceptible to damage.

[0004] In order to solve the above technical problems, the present invention provides an electromagnetic shielding cable trough for a building structure, comprising: a steel concrete trough body constructed on the building structure, a wire box installed in the steel concrete trough body, a metal shielding mesh covering the open opening of the wire box, a grounding wire connected to the metal shielding mesh, a plurality of horizontal supports at the open opening of the wire box arranged below the metal shielding mesh, and a cable trough cover plate arranged above the metal shielding mesh.

[0005] Furthermore, in the electromagnetic shielding cable trough of the building structure provided by the present invention, sunken side grooves are arranged on the steel concrete on both sides of the steel concrete trough body, and grooves are arranged downward on the lower surface of the side grooves, and the metal shielding net includes a metal net and a plurality of metal columns fixedly arranged on both sides thereof, and the metal shielding net is slidably connected in the grooves of the corresponding side grooves through the metal columns on both sides.

[0006] Furthermore, in the electromagnetic shielding wire trough of the building structure provided by the present invention, angle steel is arranged on the side trough, and the groove is arranged on the angle steel.

[0007] Furthermore, in the electromagnetic shielding wire trough of the building structure provided by the present invention, the wire box is a metal wire box, the metal wire box is connected to a grounding wire, and the metal wire box is coated with an electromagnetic shielding layer and an anti-corrosion layer.

[0008] Furthermore, in the electromagnetic shielding cable trough of the building structure provided by the present invention, the cable box is a non-metallic cable box, a conductive layer, an electromagnetic shielding layer and an anti-corrosion layer are sequentially coated in the non-metallic cable box, and the conductive layer is connected to a ground wire.

[0009] Furthermore, in the electromagnetic shielding cable trough of the building structure provided by the present invention, the cable trough cover is a metal cover, the metal cover is coated with an electromagnetic shielding layer and an anti-corrosion layer, and the metal cover is connected to a ground wire.

[0010] Furthermore, in the electromagnetic shielding cable trough of the building structure provided by the present invention, the cable trough cover is a non-metallic cover, the non-metallic cover is coated with a conductive layer, an electromagnetic shielding layer and an anti-corrosion layer, and the conductive layer is connected to a ground wire.

[0011] In order to solve the above technical problems, the present invention also provides a construction method of an electromagnetic shielding cable trough of a building structure, comprising:

[0012] A rectangular groove is provided along the surface of the building structure;

[0013] Install steel sections on both sides of the rectangular trough and pour concrete to form a steel-concrete trough body;

[0014] Install the wire box in the steel concrete tank;

[0015] A plurality of braces are horizontally provided at the open opening of the wire box;

[0016] Side grooves are provided on the upper surface of the steel concrete trough body along the open sides of the line box;

[0017] Construct grooves in the side grooves;

[0018] Sliding a metal shielding net composed of a metal column and a metal net into the groove of the side groove through the metal column;

[0019] Ground the metal shielding mesh through the grounding wire;

[0020] Cable duct cover for covering the side duct and metal shielding mesh to install closed cable box.

[0021] Furthermore, the present invention provides a construction method for an electromagnetic shielding cable trough of a building structure. When the cable trough is a metal cable trough and the cable trough cover is a metal cover, an electromagnetic shielding layer and an anti-corrosion layer are coated inside the cable trough and on the inner surface of the cable trough cover, and the cable trough, the cable trough cover and the grounding wire are connected.

[0022] Furthermore, the present invention provides a construction method for an electromagnetic shielding cable trough of a building structure. When the cable trough is a non-metallic cable trough and the cable trough cover is a non-metallic cover, a conductive layer, an electromagnetic shielding layer and an anti-corrosion layer are coated inside the cable trough and on the inner surface of the cable trough cover, and the conductive layer is connected to the ground wire.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The electromagnetic shielding cable trough of the building structure provided by the present invention and the construction method thereof can shield the electromagnetic signals generated by the wires and cables in the wire box from leaking out of the wire box, and shield the external electromagnetic signals from entering the wire box to cause adverse effects on the normal operation of the wires and cables and the electronic and electrical equipment connected thereto, by means of a metal shielding net provided to cover the opening of the wire box, thereby preventing electromagnetic interference, avoiding the adverse effects of electromagnetic radiation on human health, ensuring the signal transmission quality of the wires and cables in the wire box, and reducing signal loss and bit error rate. Through the grounding wire connected to the metal shielding net, the spike current and spike voltage signals generated by the external current signal, external voltage signal or poor contact input to the metal shielding net can be released to the ground, thereby reducing the safety of electric shock accidents and avoiding the problem of damage to the wires and cables in the wire box.

[0025] The electromagnetic shielding cable trough of a building structure and the construction method thereof provided by the present invention improve the structural strength of the trough constructed on the building structure by means of the steel sections in the steel concrete trough body, and can reduce the problem of structural deformation or damage of the trough body when subjected to a large load or external forces such as wind pressure and earthquake. The open part of the wire box in the steel concrete trough body is horizontally supported by the braces, thereby significantly improving the lateral stiffness of the wire box and improving the deformation resistance of the wire box. Therefore, the dual deformation resistance design of the Wugang concrete trough body and the braces ensures the structural safety of the electromagnetic shielding wire box, extends the service life of the electromagnetic shielding wire box, reduces the risk of structural deformation or damage of the trough body, and reduces or avoids the problem of magnetic leakage or circuit breaking due to unfavorable protection of wires and cables in the wire box.

[0026] The electromagnetic shielding wire trough of the building structure and the construction method thereof provided by the present invention cover and protect the wire box through a wire box cover plate to prevent the wires and cables from being exposed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural diagram of the electromagnetic shielding cable duct of the building structure;

[0028] Figure 2 It is a schematic diagram of the elevation structure of the electromagnetic shielding cable duct of the building structure;

[0029] Figure 3 It is a schematic diagram of the planar structure of the electromagnetic shielding cable duct of the building structure;

[0030] Figure 4 It is a schematic diagram of the structure of the conductive layer, electromagnetic shielding layer and anti-corrosion layer coated in the wire box;

[0031] As shown in the figure:

[0032] 100. Electromagnetic shielding cable ducts for building structures;

[0033] 110, steel-concrete tank, 111, steel, 112, concrete structure;

[0034] 120, wire box, 121, conductive layer, 122, electromagnetic shielding layer, 123, anti-corrosion layer, 124, open;

[0035] 130, metal shielding net, 121, metal wire mesh, 122, metal column;

[0036] 140. Ground wire;

[0037] 150. Wire trough cover;

[0038] 160. Horizontal bracing;

[0039] 170, side groove, 171, groove. DETAILED DESCRIPTION

[0040] The present invention is described in detail below in conjunction with the accompanying drawings: The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are all in very simplified form and are not in exact proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0041] Please refer to Figures 1 to 4 An embodiment of the present invention provides an electromagnetic shielding cable trough 100 for a building structure, comprising: a steel concrete trough body 110 constructed on the building structure, a wire box 120 installed in the steel concrete trough body 110, a metal shielding net 130 provided to cover the open opening of the wire box 120, a grounding wire 140 connected to the metal shielding net 130, a plurality of horizontal supports 160 provided below the metal shielding net 130 and supported at the open opening of the wire box 120, and a cable trough cover plate 150 provided above the metal shielding net 130.

[0042] Please refer to Figures 1 to 3 In order to facilitate the disassembly and assembly of the metal shielding net 130, the electromagnetic shielding wire trough 100 of the building structure provided by the embodiment of the present invention has sunken side grooves 170 arranged on the steel concrete on both sides of the steel concrete trough body 110, and the lower surface of the side groove 170 is downwardly provided with a groove 171, and the metal shielding net 130 includes a metal net 131 and a plurality of metal columns 132 fixedly arranged on both sides thereof, and the metal shielding net is slidably connected in the groove 171 of the corresponding side groove 170 through the metal columns 132 on both sides. The metal shielding net 130 can slide in the groove 171 of the side groove 170 to facilitate the disassembly and assembly of the metal shielding net 130, and to facilitate the installation and maintenance of the wires and cables in the wire box 120 below it.

[0043] The embodiment of the present invention further provides a construction method of an electromagnetic shielding cable trough 100 of a building structure, which may include the following steps:

[0044] Step 201, a rectangular groove is opened along the surface of a building structure, wherein the building structure is mainly the ground, and can also be a wall. In this case, the cross-sectional shape of the rectangular groove opened on the building structure is usually U-shaped.

[0045] Step 202, install steel 111 on both sides of the rectangular trough and pour concrete 112 to form a steel concrete trough body 110. The structural strength of the traditional trough body is improved by the steel concrete trough body 110. The steel 111 can be H-shaped steel, I-shaped steel, channel steel, etc.

[0046] Step 203, installing the wire box 120 in the steel concrete tank 110. The wire box 120 can be U-shaped or C-shaped.

[0047] In step 204, a plurality of braces 160 are horizontally supported at the opening 124 of the wiring box 120. In order to improve the support strength, the braces 160 can be steel components such as steel bars and steel pipes. The braces 160 can prevent the wiring box 120 from being deformed.

[0048] Step 205 , side grooves 170 are formed on the upper surface of the steel concrete tank body 110 along both sides of the opening 124 of the wire box 120 . That is, the side grooves 170 are formed by cutting rectangular notches at the edges of the upper surface of the length side of the steel concrete tank body 110 .

[0049] Step 206, construct a groove 171 in the side groove 170. The groove 171 can be a C-shaped groove or a dovetail groove.

[0050] Step 207, the metal shielding net 130 composed of the metal pillars 132 and the metal mesh 131 is slidably installed in the groove 171 of the side groove 170 through the metal pillars 132. A plurality of metal pillars 132 are arranged on each side of the metal shielding net 130. The metal shielding net 130 is used to shield electromagnetic signals. In order to improve the electromagnetic shielding effect, the metal pillars 132 can be copper pillars, and the metal mesh 131 can be copper wire mesh.

[0051] Step 208 , grounding the metal shielding mesh 130 through the grounding wire 140 .

[0052] Step 209, cover the side groove 170 and the metal shielding net 130 to install the wire groove cover 150 that closes the wire box 120. The wire groove cover 150 protects the steel concrete groove body 110, the metal shielding net 130, the support 160 and the wire box 120.

[0053] The electromagnetic shielding cable trough 100 of the building structure and the construction method thereof provided by the embodiment of the present invention can shield the electromagnetic signals generated by the wires and cables in the wire box 120 from leaking out of the wire box 120 through the metal shielding net 130 provided to cover the opening 124 of the wire box 120, and shield the external electromagnetic signals from entering the wire box 120 to cause adverse effects on the normal operation of the wires and cables and the electronic and electrical equipment connected thereto, thereby preventing electromagnetic interference, avoiding the adverse effects of electromagnetic radiation on human health, ensuring the signal transmission quality of the wires and cables in the wire box 120, and reducing signal loss and bit error rate. Through the grounding wire 140 connected to the metal shielding net 130, the current signal, voltage signal or peak current and peak voltage signal generated by poor contact, etc., which are externally input to the metal shielding net 130, can be released to the ground, thereby reducing the safety of electric shock accidents and avoiding the problem of damage to the wires and cables in the wire box 120. The lightning signal can be released through the grounding wire 140, which has the effect of lightning protection.

[0054] The electromagnetic shielding cable trough 100 of the building structure and the construction method thereof provided in the embodiment of the present invention improve the structural strength of the trough body constructed on the building structure through the steel section in the steel concrete trough body 110, and can reduce the problem of deformation or damage of the trough structure when it is subjected to a large load or external forces such as wind pressure and earthquake. The opening 124 of the wire box 120 in the steel concrete trough body 110 is horizontally supported by the brace 160, thereby significantly improving the lateral stiffness of the wire box 120 and improving the deformation resistance of the wire box 120. The brace 160 can reduce the damage to the wire box 120 caused by deformation, cracking and other problems of the steel concrete trough body 110 during use. Therefore, the dual anti-deformation design of the Wugang concrete trough body and the brace 160 ensures the structural safety of the electromagnetic shielding wire box 120, extends the service life of the electromagnetic shielding wire box 120, reduces the risk of structural deformation or damage of the trough body, and reduces or avoids the problem of magnetic leakage or circuit breaking due to the unfavorable protection of the wires and cables in the wire box 120. The steel-concrete trough 110 mainly enhances the strength of the traditional trough opening through the steel 111 therein, reinforces the traditional trough and prevents the trough space structure from being deformed, so as to avoid the problem that the traditional trough is easily damaged.

[0055] The electromagnetic shielding cable duct 100 of the building structure and the construction method thereof provided in the embodiment of the present invention cover and protect the wire box 120 through the cover plate of the wire box 120, so as to prevent the wires and cables in the wire box 120 from being exposed to the outside.

[0056] Please refer to Figure 1 In order to improve the structural strength of the side groove 170 so that it can bear the loads imposed by the wire groove cover 150 and the objects and equipment thereon, the electromagnetic shielding wire groove 100 of the building structure provided by the embodiment of the present invention has an angle steel disposed on the side groove 170, and the groove 171 is disposed on the angle steel. The angle steel can also improve the quality of the sliding connection with the metal shielding mesh 130, and improve the reliability and service life of the sliding connection. The sliding connection between the metal shielding mesh 130 and the side groove 170 can conveniently adjust the metal shielding mesh 130 to be tightly fixed on the steel concrete trough body 110, so that the metal shielding mesh 130 can be installed completely and continuously, and the problem of electromagnetic leakage caused by disconnection can be prevented.

[0057] Please refer to Figure 4In order to improve the effect and service life of electromagnetic shielding, the electromagnetic shielding cable trough 100 of the building structure provided by the embodiment of the present invention, the wire box 120 is a metal wire box 120, the metal wire box 120 is connected to a grounding wire 140, and the metal wire box 120 is coated with an electromagnetic shielding layer 122 and an anti-corrosion layer 123. At this time, the metal wire box 120 and the electromagnetic shielding layer 122 and the metal shielding net 130 therein form a three-layer electromagnetic shielding structure, thereby improving the electromagnetic shielding effect. The anti-corrosion layer 123 increases the service life of the wire box 120 and reduces the risk of rust, so as to be suitable for application scenarios under various environmental conditions. In order to prevent external current signals and voltage signals from causing damage to the electromagnetic shielding cable trough 100 and the wires and cables therein, the grounding wire 140 connected to the metal wire box 120 and the electromagnetic shielding net 130 can release current and voltage to the ground, thereby improving the release efficiency of external current and voltage, and avoiding the damage caused to the electromagnetic shielding cable trough 100 and the wires and cables therein by external large currents and large voltages. The electromagnetic shielding layer 122 may be a metal coating such as aluminum foil or copper foil, or may be metallized paper or semiconductor paper.

[0058] In order to further improve the electromagnetic shielding effect and avoid electric shock and damage to the electromagnetic shielding wire trough 100 and the wires and cables therein, the electromagnetic shielding wire trough 100 of the building structure provided in the embodiment of the present invention, the wire trough cover 150 is a metal cover, the metal cover is coated with an electromagnetic shielding layer and an anti-corrosion layer, and the metal cover is connected to a grounding wire 140. At this time, the electromagnetic shielding wire trough 100 forms a five-layer electromagnetic shielding structure through the metal cover and the electromagnetic shielding layer thereon, the metal shielding net 130, the metal wire box 120 and the electromagnetic shielding layer 122 therein, thereby improving the electromagnetic shielding effect and improving the performance of anti-electromagnetic interference. Through the triple grounding method of the metal cover, the metal shielding net 130, and the grounding wire 140 connected to the metal wire box, it is avoided to solve and release the external current and voltage signals, and to avoid the damage caused by the external large current and large voltage to the electromagnetic shielding wire trough 100 and the wires and cables therein in an instant, thereby ensuring the safety of the use of the electromagnetic shielding wire trough 100.

[0059] The construction method of the electromagnetic shielding cable trough 100 of the building structure provided in an embodiment of the present invention, when the cable trough is a metal cable trough and the cable trough cover 150 is a metal cover, an electromagnetic shielding layer 122 and an anti-corrosion layer 123 are coated inside the cable trough and on the inner surface of the cable trough cover 150, and the cable trough, the cable trough cover 150 and the grounding wire 140 are connected.

[0060] The electromagnetic shielding wire trough 100 of the building structure and the construction method thereof provided in the embodiment of the present invention can significantly enhance the electromagnetic shielding effect of the electromagnetic shielding wire trough 100 of the building structure by using the wire box 120 and the wire trough cover 150 made of conductive materials such as metal wire boxes and metal cover plates and the additional metal shielding net 130. This multiple shielding design can effectively reduce the impact of external electromagnetic interference on the wires or cables inside the electromagnetic shielding wire trough 100, and ensure the stability and safety of signal transmission.

[0061] Please refer to Figure 4 In order to reduce costs and improve the electromagnetic shielding effect at the same time, the electromagnetic shielding cable trough 100 of the building structure provided by the embodiment of the present invention, the wire box 120 is a non-metallic wire box 120, and the non-metallic wire box 120 is coated with a conductive layer 121, an electromagnetic shielding layer 122 and an anti-corrosion layer 123 in sequence, and the conductive layer 121 is connected to a grounding wire 140. At this time, the electromagnetic shielding cable trough 100 forms a double-layer electromagnetic shielding structure through the metal shielding net 130 and the electromagnetic shielding layer 122, thereby enhancing the electromagnetic shielding effect. The non-metallic wire box reduces the cost of the wire box 120 relative to the metal wire box. The grounding wire 140 connected to the conductive layer 121 and the metal shielding net 130 is used to release the external input current and voltage, thereby avoiding electric shock and damage to the electromagnetic shielding cable trough 100 and the wires and cables therein.

[0062] In order to reduce costs and improve the ability to release external current and voltage signals to the ground, the electromagnetic shielding cable trough 100 of the building structure provided in the embodiment of the present invention, the cable trough cover 150 is a non-metallic cover, and the non-metallic cover is coated with a conductive layer 121, an electromagnetic shielding layer 122 and an anti-corrosion layer 123, and the conductive layer 121 is connected to a grounding wire 140. The external current and voltage signals are introduced into the ground through the conductive layer 121 and the grounding wire 140 of the metal shielding net 130, thereby ensuring the safety of the electromagnetic shielding cable trough 100, avoiding electric shock and damage to wires and cables, and improving the protection effect of the electromagnetic shielding cable trough 100 and the wires and cables therein.

[0063] In the construction method of the electromagnetic shielding wire trough 100 of the building structure provided by the embodiment of the present invention, when the wire trough is a non-metallic wire trough and the wire trough cover 150 is a non-metallic cover, a conductive layer 121, an electromagnetic shielding layer 122 and an anti-corrosion layer 123 are coated in the wire trough and on the inner surface of the wire trough cover 150, and the conductive layer 121 is connected to the grounding wire 140. In order to facilitate installation and maintenance, the wire trough cover 150 can be detachably connected.

[0064] The construction method of the electromagnetic shielding cable trough 100 of the building structure provided by the embodiment of the present invention mainly utilizes the electromagnetic shielding performance of the metal shielding mesh 130 to prevent the normal operation and safety of the wires and cables of the wire box 120 of the metal shielding mesh 130 and the electronic and electrical equipment connected thereto in the case of severe electromagnetic interference, and avoids the wires and cables in the wire box 120 from being subjected to electromagnetic interference.

[0065] The electromagnetic shielding cable trough 100 and the construction method of the building structure provided by the embodiment of the present invention, the wire box 120 can ensure the neat installation of the wires and cables therein, and the wire box 120 can be arranged in compartments to neatly install different types of wires and cables.

[0066] The electromagnetic shielding cable trough 100 of the building structure and the construction method thereof provided in the embodiment of the present invention can effectively absorb electromagnetic waves and radio frequency waves through the multi-layer electromagnetic shielding structure, reduce electromagnetic signal interference and remote disturbance of magnetic objects, thereby protecting the cable trough and the cables inside and ensuring line transmission.

[0067] In the electromagnetic shielding wire trough 100 of the building structure and the construction method thereof provided by the embodiment of the present invention, the electromagnetic eddy current formed by the metal shielding net 130 reduces the temperature of the heat conduction environment in the signal power supply. At the same time, the electromagnetic shielding wire trough 100 has a large area, which is conducive to heat dissipation.

[0068] The electromagnetic shielding cable trough 100 for a building structure and the construction method thereof provided in the embodiment of the present invention provide safety protection for wires and cables from multiple angles, such as the structural strength design of the steel concrete trough body 110, the electromagnetic shielding effect of the electromagnetic shielding net 130, the supporting strength of the support 160 for the junction box 120, the protective effect of the cable trough cover 150, and the release of external current and voltage signals to the ground by the grounding wire 140.

[0069] The present invention is not limited to the above-mentioned specific implementation modes. Obviously, the above-mentioned embodiments are only some embodiments of the embodiments of the present invention, but not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention. Those skilled in the art can make other levels of modifications and changes to the present invention. In this way, if these modifications and changes of the present invention fall within the scope of the claims of the present invention, the present invention is also intended to include these changes and changes.

Claims

1. An electromagnetic shielding cable trough for a building structure, characterized in that: include: A steel concrete trough constructed on a building structure, a wire box installed in the steel concrete trough, a metal shielding mesh covering the opening of the wire box, a grounding wire connected to the metal shielding mesh, a plurality of horizontal supports at the opening of the wire box below the metal shielding mesh, and a wire trough cover plate above the metal shielding mesh.

2. The electromagnetic shielding cable duct for a building structure according to claim 1, characterized in that: The steel concrete on both sides of the steel concrete trough body is provided with sunken side grooves, and the lower surface of the side groove is provided with grooves downwardly. The metal shielding net includes a metal net and a plurality of metal columns fixedly arranged on both sides thereof. The metal shielding net is slidably connected in the grooves of the corresponding side grooves through the metal columns on both sides.

3. The electromagnetic shielding cable duct for a building structure according to claim 2, characterized in that: An angle steel is arranged on the side groove, and the groove is arranged on the angle steel.

4. The electromagnetic shielding cable duct for a building structure according to claim 1, characterized in that: The wire box is a metal wire box, the metal wire box is connected to a ground wire, and an electromagnetic shielding layer and an anti-corrosion layer are coated inside the metal wire box.

5. The electromagnetic shielding cable duct for a building structure according to claim 1, characterized in that: The wire box is a non-metallic wire box, in which a conductive layer, an electromagnetic shielding layer and an anti-corrosion layer are sequentially coated, and the conductive layer is connected to a grounding wire.

6. The electromagnetic shielding cable duct for a building structure according to claim 1, characterized in that: The cable trough cover is a metal cover, an electromagnetic shielding layer and an anti-corrosion layer are coated inside the metal cover, and the metal cover is connected to a grounding wire.

7. The electromagnetic shielding cable duct for a building structure according to claim 1, characterized in that: The cable trough cover is a non-metallic cover, and a conductive layer, an electromagnetic shielding layer and an anti-corrosion layer are coated inside the non-metallic cover, and the conductive layer is connected to a grounding wire.

8. A method for constructing an electromagnetic shielding cable duct for a building structure according to any one of claim 2, characterized in that: include: A rectangular groove is provided along the surface of the building structure; Install steel sections on both sides of the rectangular trough and pour concrete to form a steel-concrete trough body; Install the wire box in the steel concrete tank; A plurality of braces are horizontally provided at the open opening of the wire box; Side grooves are provided on the upper surface of the steel concrete trough body along the open sides of the line box; Construct grooves in the side grooves; Sliding a metal shielding net composed of a metal column and a metal net into the groove of the side groove through the metal column; Ground the metal shielding mesh through the grounding wire; Cable duct cover for covering the side duct and metal shielding mesh to install closed cable box.

9. The construction method of the electromagnetic shielding cable trough of the building structure according to claim 8, characterized in that: When the wire trough is a metal wire trough and the wire trough cover is a metal cover, an electromagnetic shielding layer and an anti-corrosion layer are coated inside the wire trough and on the inner surface of the wire trough cover, and the wire trough, the wire trough cover and the grounding wire are connected.

10. The construction method of the electromagnetic shielding cable trough of the building structure according to claim 8, characterized in that: When the wire trough is a non-metallic wire trough and the wire trough cover is a non-metallic cover, a conductive layer, an electromagnetic shielding layer and an anti-corrosion layer are coated inside the wire trough and on the inner surface of the wire trough cover, and the conductive layer is connected to the ground wire.

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