Grounding grid round steel connecting device and construction method

Abstract

The invention discloses a grounding grid round steel connecting device and a construction method, and belongs to the technical field of power transmission line construction, the grounding grid round steel connecting device comprises a connecting device main body, a compression bolt, grounding grid round steel, a wedge block, a round steel placing through hole, an inclined hole threaded hole and an inclined hole through hole; an inclined hole threaded hole and an inclined hole through hole are formed in the two sides of the connecting device body respectively. A compression bolt is arranged at the inclined hole threaded hole; a wedge block is arranged at the through hole of the inclined hole; a round steel placing through hole is formed in the connecting device main body; and grounding grid round steel is arranged at the round steel placing through hole. The pure mechanical structure construction does not involve electricity and fire construction operation, and the construction condition limitation is solved; the self-locking capacity is achieved by applying pressure through threads, and the connection reliability is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of power transmission line construction technology, specifically relating to a grounding grid round steel connection device and construction method. Background Technology

[0002] The grounding grid of transmission lines is a key facility for ensuring the safe operation of the power system. It achieves grounding conductivity through the laying and connection of round steel bars. Currently, the laying and connection of round steel bars in grounding grids mostly uses welding methods. Welding is divided into electric welding and exothermic welding. Electric welding is a welding operation that uses a welding rod to melt the metal parts to be connected by a high-temperature electric arc; exothermic welding utilizes the chemical reaction between aluminum and metal oxides (such as copper oxide). Welding construction requires professional personnel and requires waiting for the weld to cool, resulting in low construction efficiency. The welded connection structure cannot be disassembled and adjusted; any adjustments during construction would require damaging the overall structure.

[0003] In addition, power transmission line construction often takes place in the field, and the construction conditions involve the use of electric fire. On the one hand, the use of electricity is inconvenient, and on the other hand, according to the relevant provisions of laws and regulations such as the "Forest Law of the People's Republic of China", "Grassland Law of the People's Republic of China", "Forest Fire Prevention Regulations", and "Grassland Fire Prevention Regulations", many places have issued fire bans, which restrict outdoor fire use in specific areas and periods. The construction methods for welding the grounding grid of power transmission lines are restricted, which affects the progress of infrastructure construction.

[0004] Therefore, there is an urgent need for a round steel connection structure that requires no welding, has high efficiency in connection, and is highly reliable, in order to solve the above-mentioned problems existing in the current technology. Summary of the Invention

[0005] In order to solve the problems of high labor costs, high material consumption, and fire ban restrictions in the construction and adjustment of existing technologies, this invention proposes a grounding grid round steel connection device and construction method.

[0006] The technical solution of the present invention is: a grounding grid round steel connection device includes a connection device body, a clamping bolt, a grounding grid round steel, a wedge block, a through hole for placing the round steel, an oblique threaded hole, and an oblique through hole;

[0007] The main body of the connecting device is provided with inclined threaded holes and inclined through holes on both sides; a clamping bolt is provided at the inclined threaded hole; a wedge is provided at the inclined through hole; a through hole for placing round steel is provided inside the main body of the connecting device; a grounding grid round steel is provided at the through hole for placing round steel.

[0008] Furthermore, the clamping bolt and the inclined threaded hole cooperate to generate a preload force. Under the positioning action of the inclined through hole, the preload force is transmitted through the wedge block to fix the grounding grid round steel placed in the through hole for placing the round steel.

[0009] Furthermore, the oblique through hole is connected to the oblique threaded hole; the oblique through hole is connected to the through hole for placing the round steel.

[0010] Furthermore, the wedge can slide within the inclined through hole during installation; the wedge is fixed after installation.

[0011] Furthermore, the wedge is cylindrical and has a groove at one end.

[0012] Furthermore, the clamping bolt engages with the thread of the inclined threaded hole.

[0013] Furthermore, the outer wall of the main body of the connecting device is provided with annular ribs.

[0014] Furthermore, the outer shell containing the round steel through holes, oblique threaded holes, and oblique through holes is provided with reinforcing ribs.

[0015] Based on the above device, the present invention also proposes a construction method for a grounding grid round steel connection device, comprising the following steps:

[0016] S1. Insert the grounding grid round steel. After cleaning the grounding grid round steel, place it at a distance from the end face. Draw a line along the length of the through hole, and insert the grounding grid round steel into the through hole so that the drawn line is aligned with the end face of the through hole;

[0017] S2. Insert the wedge block so that the groove of the wedge block faces the grounding grid round steel, and insert it into the inclined through hole so that the groove contacts the grounding grid round steel;

[0018] S3. Tighten the clamping bolt. Use the corresponding socket ratchet wrench to tighten the clamping bolt so that the clamping bolt contacts the wedge block.

[0019] S4. Apply preload: Use a torque wrench to apply preload to the clamping bolt.

[0020] The beneficial effects of this invention are as follows: The grounding grid round steel connecting device of this invention uses bolts to apply pressure and push wedges to transmit pressure to fix the grounding grid round steel, which is simple to operate and improves construction efficiency; it can be disassembled by loosening the bolts, which is convenient for adjustment during construction; the pure mechanical structure construction does not involve electric or hot work, which solves the construction condition limitations; the use of threaded pressure has self-locking ability, which ensures the reliability of the connection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a grounding grid round steel connection device according to the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a grounding grid round steel connection device of the present invention from another angle;

[0023] Figure 3This is a schematic diagram of the structure of a grounding grid round steel connection device of the present invention from another angle;

[0024] Figure 4 For along Figure 2 A schematic cross-sectional view taken by the cutting line AA in the diagram;

[0025] Figure 5 For the main body of the connecting device along Figure 2 A schematic cross-sectional view taken by the cutting line AA in the diagram;

[0026] Figure 6 A flowchart illustrating the construction method for the grounding grid round steel connection device;

[0027] In the figure, 1. Connecting device body, 2. Clamping bolt, 3. Annular rib, 4. Grounding grid round steel, 5. Reinforcing rib, 6. Wedge block, 7. Through hole for placing round steel, 8. Angled threaded hole, 9. Angled through hole. Detailed Implementation

[0028] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0029] like Figure 1 As shown, the present invention provides a grounding grid round steel connection device, including a connection device body 1, a clamping bolt 2, a grounding grid round steel 4, a wedge block 6, a round steel placement through hole 7, an inclined threaded hole 8, and an inclined through hole 9;

[0030] like Figures 2-5 As shown, the main body 1 of the connecting device is provided with inclined threaded holes 8 and inclined through holes 9 on both sides respectively; a clamping bolt 2 is provided at the inclined threaded hole 8; a wedge block 6 is provided at the inclined through hole 9; a round steel through hole 7 is provided inside the main body 1 of the connecting device; a grounding grid round steel 4 is provided at the round steel through hole 7.

[0031] To achieve non-fired operation while controlling costs, this invention provides a connection device and construction method. The grounding grid round steel is inserted, and pressure is applied through the threads to push the wedge block to squeeze, thereby completing the stable connection of the grounding grid round steel.

[0032] The main body 1 of the connecting device is provided with a through hole for placing the ground grid round steel of the connected component, and oblique holes are provided on both sides of the through hole, which are set as stepped holes.

[0033] like Figure 4 As shown, the clamping bolt 2 contacts the wedge block 6 and exerts a force, and the wedge block 6 contacts the grounding grid round steel 4 and exerts a force.

[0034] The through hole on the main body 1 of the connecting device is a hole for placing the round steel of the ground grid to be connected. The diameter of the through hole is larger than the upper limit of the diameter of the round steel. When connecting, the two round steels are inserted from both ends of the through hole for placing the round steel, and are placed symmetrically relative to the main body 1 of the connecting device.

[0035] The axes of the two oblique holes on the main body 1 of the connecting device are located on intersecting straight lines at a certain distance from the center point of the through hole axis and are parallel to each other. They are symmetrical with respect to the center point of the through hole axis. The through hole part of the oblique hole and the cylindrical main body part of the wedge block are in clearance fit. The minor diameter of the threaded hole part is larger than the diameter of the through hole.

[0036] The main body 1 of the connecting device is an integral structure and can be manufactured by casting or machining. The main body 1 of the connecting device is provided with a through hole 7 for placing the grounding grid round steel. The inner diameter of the through hole is larger than the maximum outer diameter of the grounding grid round steel. The main body 1 of the connecting device is provided with two oblique holes, which are oblique threaded holes 8 and oblique through holes 9. Two wedges 6 are provided in the smooth hole part. The wedges 6 are mainly cylindrical in shape, with a groove at one end to form a wedge structure. Two clamping bolts 2 are provided in the threaded hole part. Through the threaded engagement, a preload is applied to the clamping bolts 2, thereby pushing the wedges 6 into the gap between the oblique hole of the connecting device and the grounding grid round steel to form an interference fit, thereby achieving a stable connection.

[0037] The specifications of the grounding grid round steel can be changed. As long as the size of the grounding grid round steel does not exceed the through hole size, if the specifications are reduced to a smaller size, such as a diameter reduction of 1mm, the invention can still be used to achieve the connection effect without any modifications. If the specifications are reduced by a larger amount, such as a reduction of 5mm, the connection effect can be achieved by replacing wedges of different specifications and sizes. When the specifications of the round steel are larger than the through hole size, a larger specification grounding grid round steel connecting device can be used to complete the connection.

[0038] In this embodiment of the invention, the clamping bolt 2 and the inclined threaded hole 8 cooperate to generate a preload force. Under the positioning effect of the inclined through hole 9, the preload force is transmitted through the wedge block 6 to fix the grounding grid round steel 4 placed in the round steel through hole 7.

[0039] In embodiments of the present invention, such as Figure 5 As shown, the oblique through hole 9 is connected to the oblique threaded hole 8; the oblique through hole 9 is connected to the through hole 7 for placing round steel.

[0040] In embodiments of the present invention, such as Figure 4 As shown, the wedge 6 can slide in the inclined through hole 9 during installation; the wedge 6 is fixed after installation.

[0041] The main body of the wedge is cylindrical, with a groove at one end forming a wedge shape. A clamping bolt is provided in the threaded hole. Through the main body of the connecting device, the clamping bolt pushes the wedge to apply pressure and fix the wedge, thereby fixing the round steel and completing the connection.

[0042] In this embodiment of the invention, the wedge 6 is cylindrical and has a groove at one end.

[0043] The groove is a cylindrical groove at a certain angle to the cylindrical axis of the wedge body. The angle is equal to the angle between the through hole and the oblique hole of the connecting device body. The outer diameter of the groove is not less than that of the wedge body, so that one end of the wedge is a gradually decreasing wedge shape. When connecting, the two wedges are inserted into the two oblique holes of the connecting device body with the grooved wedge end, and the groove direction is towards the through hole of the connecting device body.

[0044] In this embodiment of the invention, the clamping bolt 2 is threaded in conjunction with the threaded hole 8.

[0045] In embodiments of the present invention, such as Figure 2 As shown, the outer wall of the main body 1 of the connecting device is provided with annular ribs 3.

[0046] In embodiments of the present invention, such as Figure 3-4 As shown, the outer shell containing the round steel through hole 7, the oblique threaded hole 8, and the oblique through hole 9 is provided with reinforcing ribs 5.

[0047] A reinforcing rib 5 is provided between the outer shell of the inclined threaded hole 8 and the inclined through hole 9 of the main body 1 of the connecting device and the outer shell of the through hole 7 for placing round steel, thereby increasing the structural strength of the main body of the connecting device and improving its service life.

[0048] Based on the above device, the present invention also proposes a construction method for a grounding grid round steel connection device, such as... Figure 6 As shown, it includes the following steps:

[0049] S1. Insert the grounding grid round steel. After cleaning the grounding grid round steel, place it at a distance from the end face. Draw a line along the length of the through hole, and insert the grounding grid round steel into the through hole so that the drawn line is aligned with the end face of the through hole;

[0050] S2. Insert the wedge block so that the groove of the wedge block faces the grounding grid round steel, and insert it into the inclined through hole so that the groove contacts the grounding grid round steel;

[0051] S3. Tighten the clamping bolt. Use the corresponding socket ratchet wrench to tighten the clamping bolt so that the clamping bolt contacts the wedge block.

[0052] S4. Apply preload: Use a torque wrench to apply preload to the clamping bolt.

[0053] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of the invention, and should be understood that the scope of protection of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the technical teachings disclosed in this invention without departing from the spirit of the invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. A grounding grid round steel connection device, characterized in that, The connecting device body (1), clamping bolt (2), grounding grid round steel (4), wedge (6), round steel placement through hole (7), inclined threaded hole (8) and inclined through hole (9); The main body (1) of the connecting device is provided with a threaded hole (8) and a through hole (9) on both sides respectively; a clamping bolt (2) is provided at the threaded hole (8); a wedge (6) is provided at the through hole (9); a round steel through hole (7) is provided inside the main body (1) of the connecting device; a grounding grid round steel (4) is provided at the through hole (7).

2. The grounding grid round steel connection device according to claim 1, characterized in that, The clamping bolt (2) and the inclined threaded hole (8) cooperate to generate a preload force. Under the positioning action of the inclined through hole (9), the preload force is transmitted through the wedge block (6) to fix the grounding grid round steel (4) placed in the round steel through hole (7).

3. The grounding grid round steel connecting device according to claim 1, characterized in that, The oblique through hole (9) is connected to the oblique threaded hole (8); the oblique through hole (9) is connected to the through hole (7) for placing round steel.

4. The grounding grid round steel connection device of claim 1, wherein, The wedge (6) can slide in the inclined through hole (9) during installation; the wedge (6) is fixed after installation.

5. The grounding grid round steel connection device of claim 1, wherein, The wedge (6) is cylindrical and has a groove at one end.

6. The grounding grid round steel connection device of claim 1, wherein, The clamping bolt (2) is threaded into the inclined threaded hole (8).

7. The grounding grid round steel connection device of claim 1, wherein, The outer wall of the main body (1) of the connecting device is provided with annular ribs (3).

8. The grounding net round steel connecting device according to claim 1, characterized in that, The outer shell containing the round steel through hole (7), the oblique threaded hole (8) and the oblique through hole (9) is provided with reinforcing ribs (5).

9. A method of constructing a grounding grid round steel connecting device, characterized in that, Includes the following steps: S1. Insert the grounding grid round steel. After cleaning the grounding grid round steel, place it at a distance from the end face. Draw a line along the length of the through hole, and insert the grounding grid round steel into the through hole so that the drawn line is aligned with the end face of the through hole; S2. Insert the wedge block so that the groove of the wedge block faces the grounding grid round steel, and insert it into the inclined through hole so that the groove contacts the grounding grid round steel; S3. Tighten the clamping bolt. Use the corresponding socket ratchet wrench to tighten the clamping bolt so that the clamping bolt contacts the wedge block. S4. Apply preload: Use a torque wrench to apply preload to the clamping bolt.

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