Transformer substation shielding net building method and shielding net conductive connecting piece

Abstract

The invention discloses a transformer substation shielding net building method and a shielding net conductive connecting piece, relates to the field of shielding net installation, and aims to solve the problems that a shielding net cannot be directly installed at positions such as beams and doors and windows in an existing transformer substation shielding net installation method, and the shielding net needs to be cut into a specific shape for installation; the method comprises the following steps: step 1, drawing a shielding net laying construction drawing according to a substation house drawing; 2, the shielding nets needed at the beam position, the door and window position, the floor position, the wall body position and the roof position are processed into prefabricated part shielding nets in a centralized mode; comprising a conductive plate, a pressing plate, a supporting sleeve and a conductive ring, the conductive plates are provided with hinge parts, the two conductive plates are hinged through the hinge parts, the conductive plate is used for connecting two adjacent shielding nets, and the resistance at the joint of the two shielding nets is reduced.

Description

Technical Field

[0001] The invention relates to the field of shielding net installation, and in particular to a shielding net construction method for a transformer substation and a shielding net conductive connector. Background Art

[0002] With the rapid development of my country's economy, the electricity load has been rising year by year, and more and more EHV and UHV substation projects have been put into operation. The electrical equipment of the substation has strict requirements for the electromagnetic environment. In order to effectively reduce the impact of the induced voltage of the high-voltage transmission line outside the station on the secondary equipment in the station, these high-voltage substation projects need to lay shielding nets on the walls and roofs of the substation during the construction process.

[0003] In the process of laying the shielding net, since the shielding net cannot be directly installed at the beams, doors and windows of the room, the shielding net needs to be cut into a specific shape for installation; and after installation, the shielding net connection needs to be welded to achieve the conduction of adjacent shielding nets, so that a large amount of equipment needs to be carried during the installation of the shielding net, and the construction method is cumbersome. In addition, if complete conduction is not achieved during the welding process, the shielding net will be damaged, resulting in an increase in the average induced voltage in the substation, which will cause safety hazards to the substation. Summary of the invention

[0004] In order to solve the problems that the existing substation shielding net installation method cannot directly install the shielding net at positions such as beams, doors and windows, and the shielding net needs to be cut into a specific shape for installation; and the shielding net may not be fully conductive, the present invention further provides a substation shielding net construction method and a shielding net conductive connector to solve the problems raised in the above background technology.

[0005] The technical solution of the present invention is:

[0006] A method for constructing a shielding network for a substation, the method comprising the following steps:

[0007] Step 1: Draw the shielding net laying construction plan according to the substation house drawing;

[0008] Step 2: Process the shielding nets required at beams, doors and windows, floors, walls and roofs into prefabricated shielding nets;

[0009] Step 3: Lay the prefabricated shielding net on the surface of beams, doors and windows, floors, walls and roofs, and keep it close to the surface of the laying place;

[0010] Step 4: Bend and fold the shielding net at the opposite wall part, and cut it into a shape that can wrap the opposite wall.

[0011] And laid on the surface of the opposite wall part;

[0012] Step 5: Use fixings to fix the shielding net on beams, floor slabs, doors and windows, walls, and roofs;

[0013] Step 6: Use the shielding net conductive connector to connect each shielding net in turn.

[0014] Furthermore, the fixing member described in step five is an expansion bolt or a metal clamp.

[0015] Furthermore, the shielding net is a 10-mesh shielding net.

[0016] Furthermore, the shielding net is made of copper.

[0017] A shielding net conductive connector comprises a conductive plate, a pressure plate, a support sleeve and a conductive ring; a hinged portion is arranged on the conductive plate, two conductive plates are hinged through the hinged portion, a support sleeve is arranged between the two hinged portions, a conductive ring is arranged outside the support sleeve, and pressure plates are fixed to the conductive plates.

[0018] Furthermore, the conductive ring is made of lead.

[0019] Furthermore, a plurality of tooth-shaped contact portions are evenly arranged on a circumference of the hinge portion, and the tooth-shaped contact portions are in contact with the conductive ring.

[0020] Furthermore, a plurality of wire pressing bumps are provided on the conductive plate.

[0021] Furthermore, the two hinged parts are hingedly connected by bolts and nuts, and the bolts pass through the hinged part at the upper end, the supporting sleeve and the hinged part at the lower end in sequence.

[0022] Furthermore, bolts are fixed on the conductive plate, the bolts pass through the pressing plate, and the pressing plate is fixed to the conductive plate by bolts and nuts.

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

[0024] 1. A method for constructing a shielding net for a substation. Before construction, the size of each shielding net is calculated by drawing a shielding net laying construction drawing, and the shielding net is processed in batches into prefabricated shielding nets in the factory, which reduces the work of bending and cutting the shielding nets after transportation to the construction site, and does not require the use of shielding net processing tools, thereby improving the construction efficiency of the shielding net. Since the shielding net is processed and prefabricated in batches, the processing efficiency of the shielding net is greatly improved.

[0025] 2. A shielding net conductive connector, comprising two conductive plates hinged to each other. At the construction site, the angles of the two conductive plates are adjusted according to the angle of the connection, and the two conductive plates are fixed by bolts I and nuts I. Since the two conductive plates are hinged before being fixed, adjacent shielding nets at various angles can be connected. A conductive ring is provided between the two conductive plates. When the two conductive plates are fixed, the hinged portion on the conductive plate squeezes the conductive ring, which is slightly deformed to obtain a larger contact area, and the conductive ring conducts the upper and lower conductive plates. The two shielding nets are respectively pressed between the two sets of pressing plates and the conductive plates to achieve conduction between adjacent shielding nets. The wire pressing bumps on the conductive plates are used to squeeze the shielding nets to increase friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of the plane connection of the conductive connector of the shielding net Figure Ⅰ ;

[0027] Figure 2 Schematic diagram of the structure of the plane connection of the conductive connector of the shielding net Figure Ⅰ ;

[0028] Figure 3 It is a structural schematic diagram of the vertical connection of the conductive connector of the shielding net;

[0029] Figure 4 It is an exploded view of the conductive connector of the shielding net;

[0030] Figure 5 It is a schematic diagram of the structure of the conductive plate and the pressure plate.

[0031] In the figure: 1, conductive plate; 2, pressure plate; 3, hinged portion; 4, supporting sleeve; 6, conductive ring; 11, bolt I; 12, nut I; 21, bolt II; 22, nut II; 31, tooth-shaped contact portion; 13, wire pressing protrusion. DETAILED DESCRIPTION

[0032] Specific implementation method 1: See Figure 1-5 As shown, a method for constructing a shielding network for a substation includes the following steps:

[0033] Step 1: Draw the shielding net laying construction plan according to the substation house drawing;

[0034] Step 2: The shielding nets required at the beams, doors and windows, floors, walls and roofs are centrally processed into prefabricated shielding nets;

[0035] Step 3: Lay the prefabricated shielding net on the surface of beams, doors and windows, floors, walls and roofs, and keep it close to the surface of the laying place;

[0036] Step 4: Bend and fold the shielding net at the opposite wall part, and cut it into a shape that can wrap the opposite wall.

[0037] And laid on the surface of the opposite wall part;

[0038] Step 5: Use fixings to fix the shielding net on beams, floor slabs, doors and windows, walls, and roofs;

[0039] Step 6: Use the shielding net conductive connector to connect each shielding net in turn.

[0040] Specific implementation method 2: See Figure 1-5 As shown, the fixing member described in step five of this embodiment is an expansion bolt or a metal clamp.

[0041] Specific implementation method three: See Figure 1-5 As shown, the shielding net in this embodiment adopts a 10-mesh shielding net.

[0042] Specific implementation method four: see Figure 1-5 As shown, the shielding mesh of this embodiment is made of copper.

[0043] Furthermore, before construction, according to the house drawings of the substation, the size and quantity of non-planar parts such as beams, doors and windows are calculated, and the shielding net is bent, sheared, welded and fixed in the processing workshop according to the size of the non-planar parts to produce prefabricated shielding nets. The shielding nets laid on the floor, wall and roof are cut into sizes that are easy to splice. Carry a certain amount of prefabricated shielding nets to the substation to be constructed; prepare insulating materials, such as rubber pads or plastic sleeves, for insulation treatment of the contact parts between the shielding net and the beams, floor, doors and windows, walls and roofs to prevent current leakage and electrochemical corrosion. Use tools such as wire brushes or sandpaper to clean the surfaces of beams, floor, doors and windows, walls and roofs to remove dust, oil, rust and other impurities on the surface, and ensure that the surfaces of beams, floor, doors and windows, walls and roofs are flat and clean. Apply a layer of anti-rust paint on the surface of beams, floor slabs, doors and windows, walls, and roofs to prevent rust, which will affect the installation quality and service life of the shielding net. The prefabricated shielding net is laid on the surface of beams, floor slabs, doors and windows, walls, and roofs to make them fit tightly. For special-shaped parts, the shielding net can be appropriately bent and adjusted according to the shape to ensure that the shielding net can completely cover the surface. Use expansion bolts or metal clamps to fix the shielding net on beams, floor slabs, doors and windows, walls, and roofs. When fixing, a connector should be installed at a certain distance, generally 50-100cm, and then the shielding net should be fixed through the connector. When tightening the bolts, pay attention to moderate strength, so as to ensure that the shielding net is firmly fixed and not damage the shielding net or the surface of beams, floor slabs, doors and windows, walls, and roofs. Insulating materials such as rubber pads or plastic sleeves should be installed at the contact points between the shielding net and beams, floor slabs, doors and windows, walls, and roofs. The installation of insulating materials should be tight and firm to ensure good insulation performance between the shielding net and the beams, floor slabs, doors and windows, walls, and roofs. Finally, use the shielding net conductive connectors to connect each shielding net in turn, and use a multimeter or other test tools to measure the resistance of the shielding net to check whether the conductive performance of the shielding net is good, and finally complete the construction of the shielding net.

[0044] This method reduces the bending and cutting of the shielding net after it is transported to the construction site, and there is no need to carry shielding net processing tools, which improves the shielding net construction efficiency. There is no need to weld the joints, and there is no need to carry electric welders. Since the shielding net is processed and prefabricated in batches, the processing efficiency of the shielding net is greatly improved.

[0045] Specific implementation method five: see Figure 1-4The conductive principle of a shielding mesh conductive connector is introduced. A shielding mesh conductive connector, in this embodiment, includes a conductive plate 1, a pressure plate 2, a support sleeve 4 and a conductive ring 6; a hinge portion 3 is provided on the conductive plate 1, two conductive plates 1 are hinged through the hinge portion 3, a support sleeve 4 is provided between the two hinge portions 3, a conductive ring 6 is provided outside the support sleeve 4, and a pressure plate 2 is fixed on each of the conductive plates 1.

[0046] Furthermore, the conductive plate 1 is used to contact with the shielding net to achieve electrical conduction, and a hinged portion 3 is provided at the lower end of the side of the conductive plate 1, and the hinged portions 3 in the two conductive plates 1 are hinged by bolts. The conductive ring 6 is used to conduct the two hinged portions 3 to reduce the resistance between the two hinged portions 3. The conductive ring 6 is made of a relatively soft metal material, and the support sleeve 4 plays a role in supporting the two hinged portions 3 to prevent the conductive ring 6 from being overly squeezed when the bolts are fixed to the conductive plate 1.

[0047] When in use, the angles of the two conductive plates 1 are adjusted according to the angle of the connection at the construction site, and the two conductive plates 1 are fixed by bolts Ⅰ11 and nuts Ⅰ12. Since the two conductive plates 1 are hinged before fixing, adjacent shielding nets at various angles can be connected; a conductive ring 6 is provided between the two conductive plates 1. When the two conductive plates 1 are fixed, the hinged portion 3 on the conductive plate 1 squeezes the conductive ring 6, and the conductive ring 6 is slightly deformed to obtain a larger contact area. The conductive ring 6 conducts the upper and lower conductive plates 1; the two shielding nets are respectively pressed between the two groups of pressing plates 2 and the conductive plate 1 to achieve conduction of adjacent shielding nets.

[0048] Specific implementation method six: see Figure 1 As shown, the conductive ring 6 of this embodiment is made of lead.

[0049] Furthermore, because aluminum is relatively soft, after the two conductive plates 1 are fixed, the aluminum conductive ring 6 can fit the hinge part 3 more closely, thereby reducing the connection resistance and increasing the conductive efficiency.

[0050] Specific implementation method seven: See Figure 5 As shown, a plurality of tooth-shaped contact portions 31 are evenly arranged on the circumference of the hinge portion 3 of this embodiment, and the tooth-shaped contact portions 31 are in contact with the conductive ring 6 .

[0051] Furthermore, after the two conductive plates 1 are fixed by bolts, the tooth-shaped contact portion 31 can penetrate into the conductive ring 6, which first increases the conductive contact area between the hinge portion 3 and the conductive ring 6, and the tooth-shaped contact portion 31 penetrates into the conductive ring 6 to destroy the oxide layer on the surface of the conductive ring 6, further reducing the connection resistance and increasing the conductive efficiency.

[0052] Specific implementation method eight: See Figure 5 As shown, a plurality of wire pressing bumps 13 are provided on the conductive plate 1 of this embodiment.

[0053] Furthermore, the wire pressing protrusion 13 is used to increase the friction between the conductive plate 1 and the shielding mesh, so that the shielding mesh is fixed more firmly between the conductive plate 1 and the pressing plate 2 .

[0054] Specific implementation method nine: See Figure 4 As shown, the two hinged parts 3 of this embodiment are hingedly connected by bolts Ⅰ11 and nuts Ⅰ12, and the bolts Ⅰ11 pass through the hinged part 3 at the upper end, the support sleeve 4 and the hinged part 3 at the lower end in sequence.

[0055] Furthermore, before tightening the bolts Ⅰ11 and nuts Ⅰ12, the two conductive plates 1 can rotate freely relative to each other to adjust the connection angle. After tightening the bolts Ⅰ11 and nuts Ⅰ12, the two hinged parts 3 mutually squeeze the support sleeve 4 and the conductive ring 6 to fix the two conductive plates 1.

[0056] Specific implementation method ten: See Figure 5 As shown, the conductive plate 1 of this embodiment is fixed with bolts II21, which pass through the pressing plate 2, and the pressing plate 2 is fixed to the conductive plate 1 by bolts II21 and nuts II22. The two shielding nets to be connected are pressed into the two conductive plates 1 respectively to achieve the conduction of the shielding nets.

Claims

1. A method for constructing a shielding network for a substation, characterized in that: The method comprises the following steps: Step 1: Draw the shielding net laying construction plan according to the substation house drawing; Step 2: Process the shielding nets required at beams, doors and windows, floors, walls and roofs into prefabricated shielding nets; Step 3: Lay the prefabricated shielding net on the surface of beams, doors and windows, floors, walls and roofs, and keep it close to the surface of the laying place; Step 4: Bend and fold the shielding net at the opposite wall part, and cut it into a shape that can wrap the opposite wall. And laid on the surface of the opposite wall part; Step 5: Use fixings to fix the shielding net on beams, floor slabs, doors and windows, walls, and roofs; Step 6: Use the shielding net conductive connector to connect each shielding net in turn.

2. The method for constructing a shielding network for a substation according to claim 1, characterized in that: The fixing member described in step five is an expansion bolt or a metal clamp.

3. The method for constructing a shielding network for a substation according to claim 1, characterized in that: The shielding net is a 10-mesh shielding net.

4. The method for constructing a shielding network for a substation according to claim 3, characterized in that: The shielding net is made of copper.

5. A shielding mesh conductive connector used in claim 1, characterized in that: The invention comprises a conductive plate (1), a pressure plate (2), a support sleeve (4) and a conductive ring (6); a hinged portion (3) is provided on the conductive plate (1), two conductive plates (1) are hingedly connected via the hinged portion (3), a support sleeve (4) is provided between the two hinged portions (3), a conductive ring (6) is provided outside the support sleeve (4), and a pressure plate (2) is fixed on each conductive plate (1).

6. The shielding mesh conductive connector according to claim 5, characterized in that: The conductive ring (6) is made of lead.

7. The shielding mesh conductive connector according to claim 5, characterized in that: A plurality of tooth-shaped contact portions (31) are evenly arranged on the circumference of the hinge portion (3), and the tooth-shaped contact portions (31) are in contact with the conductive ring (6).

8. The shielding mesh conductive connector according to claim 7, characterized in that: A plurality of wire pressing bumps (13) are provided on the conductive plate (1).

9. The shielding mesh conductive connector according to claim 5, characterized in that: The two hinged parts (3) are hingedly connected via bolts I (11) and nuts I (12), and the bolts I (11) pass through the hinged part (3) at the upper end, the supporting sleeve (4) and the hinged part (3) at the lower end in sequence.

10. The shielding mesh conductive connector according to claim 5, characterized in that: The conductive plate (1) is fixed with a bolt II (21), the bolt II (21) passes through the pressing plate (2), and the pressing plate (2) is fixed to the conductive plate (1) by means of the bolt II (21) and a nut II (22).

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