Self-locking multi-directional tower combined grounding grid spacing device and assembly method

Abstract

The present invention relates to the technical field of construction of grounding grids for power transmission line towers in power systems, and specifically to a self-locking multi-directional tower combined grounding grid spacing device and assembly method, comprising a base, a strip groove is opened in the middle of the base, and through grooves are opened on both sides of the base, and a spacing device is inserted into the strip groove of the base, and the spacing device includes a lower spacing plate and an upper spacing plate, the lower spacing plate is fixed by a latch, the upper part of the lower spacing plate is screwed to the upper spacing plate, and a self-locking cover is arranged on the upper part of the upper spacing plate; the present invention can realize the spacing of a steel grounding body and a flexible graphite composite grounding grid when they are laid in parallel in a grounding trench, and at the same time, realize the spacing of two grounding materials in the vertical direction when they cross and span. The self-locking multi-directional grounding grid spacing device of the present invention is suitable for the spacing between grounding materials of any size, and the spacing device has the technical characteristics of firm connection, no need for a bolt structure, simple operation, high flexibility, and convenient assembly and disassembly.

Description

Technical Field

[0001] The invention relates to the technical field of construction of a pole tower grounding network for a power system transmission line, and in particular to a self-locking multi-directional pole tower combined grounding network spacing device and an assembly method. Background Art

[0002] Good grounding characteristics of the tower grounding grid of the power system transmission line are an important factor in preventing overvoltage on the tower top and flashover of insulators. The current tower grounding grid usually uses metal grounding materials such as carbon steel or galvanized round steel. These grounding materials will wear and break to varying degrees after being laid in the soil for a period of time, making the grounding grid unable to bear good dissipation effect and reducing resistance effect. In order to solve this phenomenon, in recent years, the tower grounding grid has gradually begun to use flexible graphite composite grounding materials with good corrosion resistance. However, for the construction that has been completed, although the original grounding grid has undergone varying degrees of corrosion, it can still bear part of the dissipation effect. In order to reduce resource waste, the current treatment method is to retain the original galvanized steel grounding grid and add a flexible graphite grounding grid, which makes the grounding bodies of the two materials constitute a multi-material combined grounding grid.

[0003] When adding a flexible graphite grounding grid to the actual transmission tower grounding grid for grounding construction, the problem of spacing between the two grounding materials, galvanized steel and flexible graphite, is often faced. On the one hand, when the flexible graphite grounding body is laid in parallel to the galvanized steel grounding body, if the two grounding bodies come into contact, local backflow will occur after contact, affecting the resistance reduction effect of the grounding body; on the other hand, when the flexible graphite grounding body is laid in the vertical direction of the galvanized steel grounding body, it is easy to come into contact in the vertical direction at the intersection. During the on-site construction of the transmission tower, the staff did not have a good spacing device to effectively separate the two grounding bodies, and could only use branches, soil and other objects to isolate different grounding materials, but this method had low reliability, irregular construction and unstable spacing. In addition, according to on-site construction experience, convenient connection methods should be used as much as possible to reduce the use of special tools. Therefore, it is particularly necessary for the combined grounding grid to adopt standardized, convenient and firm spacing devices. Summary of the invention

[0004] In order to solve the deficiencies in the above technical problems, the purpose of the present invention is to provide a self-locking multi-directional pole tower combined grounding grid spacing device and assembly method, which can solve the spacing problem between the steel grounding grid and the flexible graphite composite grounding grid during the construction of the current multi-material pole tower grounding grid for power transmission lines.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] The self-locking multi-directional pole tower combined grounding grid spacing device comprises a base, a strip groove is opened in the middle of the base, and through grooves that penetrate in both sides of the base are opened, wherein a plurality of groups of slots arranged horizontally at intervals are opened on both sides of a through groove, and a spacing device is inserted into the strip groove of the base, and the spacing device comprises a lower spacing plate and an upper spacing plate, the lower spacing plate is fixed by a pin, and the pin is clamped in the slot, the upper part of the lower spacing plate is screwed to the upper spacing plate, and a self-locking cover is arranged on the upper part of the upper spacing plate.

[0007] Preferably, a screw is provided on the upper portion of the lower partition plate, and a threaded hole is opened on the lower portion of the upper partition plate, and the screw is screwed into the threaded hole.

[0008] Preferably, a polygonal groove is formed at the lower portion of the lower partition plate, and the latch is also polygonal, and the latch is connected to the inside of the polygonal groove.

[0009] Preferably, the spacer comprises 1-4 groups.

[0010] Preferably, the strip groove is in the shape of a straight line, and the bottom of the lower partition plate is in the shape of a polygon.

[0011] Preferably, a slot and a sleeve are respectively provided on the upper portion of the upper partition plate.

[0012] The assembly method of the self-locking multi-directional pole tower combined grounding grid spacer is as follows: when two parallel-laid grounding bodies are spaced in the grounding trench, any one of the grounding bodies is placed on the upper spacer plate of the spacer on one side of the strip groove and locked with a self-locking cover. At the same time, another grounding body is locked on the upper spacer plate of the spacer on the other side, and the lower spacers of the spacers on both sides are matched with the bottom groove through pins to form an expected spacing between the two spacers, thereby achieving complete connection and fixation; when two cross-laid grounding bodies are spaced in the grounding trench, the upper spacer plate is rotated to match the lower spacer plate and twisted to the expected angle, and the lower spacer plate is placed in the strip groove and fixed by pins, thereby completing the complete connection of the spacer device.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention can realize the spacing of the steel grounding body and the flexible graphite composite grounding grid when they are laid in parallel in the grounding trench, and at the same time, realize the spacing of the two grounding materials in the vertical direction when they cross each other. The self-locking multi-directional grounding grid spacing device of the present invention is suitable for the spacing between grounding materials of any size, and the spacing device has the technical characteristics of firm connection, no need for bolt structure, simple operation, high flexibility, low preparation cost, convenient assembly and disassembly, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of the present invention;

[0016] Figure 2 A schematic diagram of the structure of two vertical grounding bodies spaced apart in the present invention;

[0017] Figure 3 A schematic diagram of the structure of two parallel grounding bodies spaced apart in the present invention;

[0018] Figure 4 A schematic diagram of the structure of the self-locking cover of the present invention;

[0019] Figure 5 A schematic diagram of the structure of the lower partition plate of the present invention;

[0020] Figure 6 A schematic diagram of the structure of the upper partition plate of the present invention;

[0021] Figure 7 A side view of the upper partition plate of the present invention;

[0022] Figure 8 Schematic diagram of the base structure of the present invention.

[0023] In the figure: 1. Self-locking cover; 2. Upper partition plate; 3. Screw; 4. Lower partition plate; 5. Card slot; 6. Strip slot; 7. Base; 8. Pin; 9. Through slot; 10. Grounding body; 11. Polygonal slot; 12. Bushing; 13. Slot; 14. Threaded hole. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0025] Example 1

[0026] like Figure 1-8 As shown, the self-locking multi-directional pole tower combined grounding grid spacing device of the present invention includes a base 7, a strip groove 6 is opened in the middle of the base 7, and the strip groove 6 is in the shape of a straight line. The base 7 has through grooves 9 on both sides, and a plurality of groups of slots 5 are arranged horizontally at intervals on both sides of a through groove 9. The spacing device is inserted into the strip groove 6 of the base 7, and the spacing device includes a lower partition plate 4 and an upper partition plate 2. The lower partition plate 4 is fixed by a latch 8, and the latch 8 is latched in the slot 5 to ensure that the lower partition plate 4 is relatively fixed with the strip groove 6 without relative displacement. The upper portion of the lower partition plate 4 is screwed to the upper partition plate 2, and a self-locking cover 1 is arranged on the upper portion of the upper partition plate 2.

[0027] Specifically, the lower partition plate 4 is in the shape of a rectangular parallelepiped, and the bottom surface is a 12-sided polygon, which is mainly matched with the concave surface of the strip groove 6 in structure to prevent the lower partition plate 4 from moving randomly in the strip groove 6. A polygonal groove 11 is provided at the bottom of the lower partition plate 4, and the latch 8 is also a polygon. The latch 8 is connected to the inside of the polygonal groove 11, so that the lower partition plate 4 will not be offset in the strip groove 6 after the three are matched. Specifically, a 12-sided polygon can be used. A screw 3 is provided on the upper part of the lower partition plate 4, and a threaded hole 14 is provided on the lower part of the upper partition plate 2. The screw 3 is screwed into the threaded hole 14, so that the lower partition plate 4 and the upper partition plate 2 can be matched to achieve fine adjustment of length and multiple angles.

[0028] The upper part of the upper partition plate 2 is provided with a slot 13 and a shaft sleeve 12 for inserting the self-locking cover 1. The rotating shaft at the left end of the self-locking cover 1 is inserted into the shaft sleeve 12. The partition plate cover can rotate in the circular groove. The self-locking end of the self-locking cover 1 is inserted into the slot 13 and stuck to form a self-locking. In this way, the grounding body 10 can be fixed on the partition plate, and the two grounding bodies 10 can play the expected spacing role. Multi-directional matching between the spacing devices is realized, which is suitable for a variety of working environments.

[0029] The bolt 8 is in the shape of a key as a whole, and the columnar part of the bolt 8 is a 12-sided column. When the strip groove 6 and the lower partition plate 4 are completely matched, a cavity suitable for the insertion of the bolt 8 is formed between the two. The bolt 8 is inserted into the cavity, so that the lower partition plate 4 and the strip groove 6 are relatively fixed. The benefit of this design is that the bolt 8 makes the three form a stable fixation, and avoids other fixing methods such as bolts when in use, and no other tools are needed, so the purpose of tool-free installation and removal can be achieved.

[0030] Since the spacer mainly realizes the fixation and insulation between the two grounding bodies 10, the materials of each component should be low-cost non-metallic materials, such as plastics or synthetic resin materials such as epoxy resin, nylon, polytetrafluoroethylene, etc.

[0031] In addition, the spacer device includes 1-4 groups, which can be selected according to needs.

[0032] The assembly method of the self-locking multi-directional pole tower combined grounding grid spacer is as follows: when two parallel-laid grounding bodies 10 are spaced in the grounding trench, any one of the grounding bodies 10 is placed on the upper spacer 2 of the spacer on one side of the strip groove 6 and locked with a self-locking cover 1. At the same time, another grounding body 10 is locked on the upper spacer 2 of the spacer on the other side, and the lower spacer 4 of the spacers on both sides is matched with the bottom groove through the pin 8 to form an expected interval between the two spacers, thereby achieving complete connection and fixation; when two cross-laid grounding bodies 10 are spaced in the grounding trench, the upper spacer 2 is rotated to match the lower spacer 4 and twisted to the expected angle, and the lower spacer 4 is placed in the strip groove 6 and fixed by the pin 8, thereby completing the complete connection of the spacer.

Claims

1. A self-locking multi-directional tower combined grounding grid spacing device, characterized in that: The invention comprises a base (7), a strip groove (6) is formed in the middle of the base (7), through grooves (9) are formed on both sides of the base (7), and a plurality of groups of slots (5) are formed on both sides of a through groove (9) and arranged horizontally at intervals. A spacing device is inserted into the strip groove (6) of the base (7), and the spacing device comprises a lower spacing plate (4) and an upper spacing plate (2). The lower spacing plate (4) is fixed by a latch (8), and the latch (8) is latched in the slot (5). The upper part of the lower spacing plate (4) is screwed to the upper spacing plate (2), and the upper part of the upper spacing plate (2) is provided with a self-locking device. The cover (1) comprises a screw (3) arranged on the upper part of the lower partition plate (4), a threaded hole (14) is arranged on the lower part of the upper partition plate (2), and the screw (3) is screwed into the threaded hole (14); a polygonal groove (11) is arranged on the lower part of the lower partition plate (4), and the latch (8) is also polygonal, and the latch (8) is inserted into the inside of the polygonal groove (11); the spacing device comprises 1 to 4 groups; the strip groove (6) is in the shape of a straight line, and the bottom of the lower partition plate (4) is polygonal; a slot (13) and a shaft sleeve (12) are respectively arranged on the upper part of the upper partition plate (2).

2. An assembly method using the self-locking multi-directional tower combined grounding grid spacer according to claim 1, characterized in that: When two parallel-laid grounding bodies (10) are spaced apart in the grounding trench, any one of the grounding bodies (10) is placed on the upper spacer (2) of the spacer on one side of the strip groove (6) and locked with a self-locking cover (1). At the same time, another grounding body (10) is locked on the upper spacer (2) of the spacer on the other side. The lower spacer (4) of the spacer on both sides is matched with the bottom groove through the pin (8) so that the expected spacing is formed between the two spacers, thus achieving complete connection and fixation. When two cross-laid grounding bodies (10) are spaced apart in the grounding trench, the upper spacer (2) is rotated to match the lower spacer (4) and twisted out of the expected angle, and the lower spacer (4) is placed in the strip groove (6) and fixed through the pin (8), thus completing the complete connection of the spacer.

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