Threaded taper sleeve crimping connecting piece for round steel grounding body connection

Abstract

The invention discloses a threaded taper sleeve crimping connecting piece for round steel grounding body connection, which comprises a connecting piece for connecting round steel bodies, a pressing piece is matched in the connecting piece, the pressing piece is limited by a locking assembly arranged outside the connecting piece, two sections of round steel bodies are locked in the connecting piece without fire, and the connecting piece is sealed; the connecting piece comprises a double-end screw cylinder internally provided with a variable-diameter channel, the variable-diameter channel is a special-shaped hole with the narrow center and the two expanded ends, and the two ends of the double-end screw cylinder are each provided with a thread part. The pressing piece comprises a conical pressing barrel with a deformation groove formed in the periphery so that the friction force between the round steel body and the variable-diameter channel can be increased. The locking assembly comprises a thread cap in threaded connection with the thread part, and a sealing piece is arranged at the end, away from the double-end screw barrel, of the thread cap. The problem that an anti-corrosion coating of a round steel grounding body is damaged when the round steel grounding body is connected without fire in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution network line connection, and in particular to a threaded cone sleeve crimping connector for connecting a round steel grounding body. Background Art

[0002] The grounding device of overhead transmission line tower is the basic lightning protection facility of the transmission line, and is the cornerstone for ensuring the safety of personnel and equipment and the reliable and safe operation of the power system. The grounding material of my country's transmission line tower is mainly made of hot-dip galvanized round steel, and its construction connection mainly adopts arc welding connection, which generates a lot of sparks and splashes everywhere. The splashing sparks can easily ignite the surrounding flammable materials. Therefore, it is urgent and necessary to study the construction technology of overhead transmission line grounding network without fire.

[0003] There is currently research and development on non-fire-connected round steel grounding electrodes, such as the bolt-type grounding grid connection process developed by Sichuan Mianyang Electric Power Company. The end of the round steel grounding electrode is threaded at the construction site, and then a special sleeve with positive and negative internal threads is used for threaded connection. This connection process requires special threading tools, the process is relatively complicated and cumbersome, and the specifications and dimensional tolerances of the grounding electrode are relatively strict, and the anti-corrosion coating of the grounding electrode is seriously damaged. For example, Wuxi Yaming Electric Power Engineering Technology Co., Ltd. has proposed a grounding connection method using a stainless steel casing for hydraulic connection. A large-tonnage hydraulic press and a special tubular stainless steel connector are used at the construction site to connect the stainless steel-clad round steel grounding body. The method is mainly aimed at stainless steel-clad steel composite grounding materials. For grounding materials with anti-corrosion coatings such as hot-dip galvanized steel and copper-clad steel, hydraulic connection will destroy the anti-corrosion coating of the material, and the two existing processes for connecting round steel grounding bodies do not have a sealing function, that is, they cannot resist the infiltration of soil solutions when the connection structure is in the soil, and cause corrosion to the butt joint sections of the two round steel grounding bodies. Therefore, the lightning protection and conductive function of the round steel grounding body is reduced. At the same time, the probability of the round steel grounding body breaking is also increased. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the anti-corrosion coating of the round steel grounding body may be damaged by connecting the round steel grounding body without fire, and to provide a threaded cone sleeve crimping connector for connecting the round steel grounding body.

[0005] The present invention solves the above-mentioned technical problems and adopts the following technical solutions: a threaded cone sleeve crimping connector for connecting a round steel grounding body, comprising a connector for connecting a round steel body; the connector comprises a double-ended screw barrel with a variable diameter channel provided inside, the inner diameter at the center of the variable diameter channel is smaller than the inner diameter at both ends, and threaded parts are provided at both ends of the double-ended screw barrel;

[0006] The pressing member comprises a conical pressing cylinder with a deformation groove provided on the outer circumference;

[0007] The locking assembly includes a threaded cap threadedly connected to the threaded portion, and a seal is provided at the end of the threaded cap facing away from the double-headed barrel.

[0008] As a further optimization of a threaded cone sleeve crimping connector for connecting round steel grounding bodies according to the present invention: The seal includes a reduced-diameter cylinder fixedly provided at the outer port of the threaded cap. The outer wall of the reduced-diameter cylinder is fixedly connected to the inner wall of the threaded cap, and a sealing ring is fixedly provided inside the inner circle of the reduced-diameter cylinder.

[0009] As a further optimization of a threaded cone sleeve crimping connector for connecting round steel grounding bodies according to the present invention: The outer peripheral surfaces at both ends of the double-headed barrel are larger than the threaded cap. The seal includes a reduced-diameter cylinder fixedly provided on the threaded cap. An annular sealing airbag is provided inside the inner circle of the reduced-diameter cylinder. The sealing airbag is communicated with a ventilation hole on the threaded cap. The ventilation hole is arranged along the radial direction of the threaded cap and is communicated with a pressing hole opened on the threaded cap. The pressing hole is arranged along the axial direction of the threaded cap. A pressing plug column is slidably arranged inside the pressing hole. One end of the pressing plug column passes through the pressing hole to squeeze the air inside the pressing hole into the sealing airbag after being pressed.

[0010] As a further optimization of a threaded cone sleeve crimping connector for connecting round steel grounding bodies according to the present invention: The ventilation hole penetrates through the threaded cap along the radial direction of the threaded cap, and a sealing screw is threadedly connected to the side of the ventilation hole away from the sealing airbag.

[0011] As a further optimization of a threaded cone sleeve crimping connector for connecting round steel grounding bodies according to the present invention: The cross-section of the sealing airbag after inflation is L-shaped. A clamping ring is fixedly provided on the outer wall of the sealing airbag. The clamping ring is clamped with a clamping groove opened on the inner wall of the reduced-diameter cylinder. A docking nozzle is provided on the outer circumference of the sealing airbag corresponding to the ventilation hole. The docking nozzle is clamped with the ventilation hole.

[0012] As a further optimization of a threaded cone sleeve crimping connector for connecting round steel grounding bodies according to the present invention: The threaded cap is hexagonal. There are six ventilation holes and pressing holes, and the six ventilation holes and pressing holes are respectively arranged at the six vertex angles of the threaded cap.

[0013] As a further optimization of a threaded cone sleeve crimping connector for connecting round steel grounding bodies according to the present invention: The end of the pressing plug column passing through the pressing hole is provided with a frosted layer.

[0014] As a further optimization of a threaded cone sleeve crimping connector for connecting round steel grounding bodies according to the present invention: The narrow opening of the variable-diameter channel is smaller than the narrow opening of the pressing cylinder.

[0015] As a further optimization of a threaded cone sleeve crimping connector for connecting round steel grounding bodies according to the present invention: The outer circumference of the double-headed barrel is hexagonal.

[0016] As a further optimization of a threaded cone sleeve crimping connector for connecting round steel grounding bodies in the present invention: an elastic layer is provided on the surface of the pressing cylinder.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present invention, by providing a double-headed screw cylinder included in the connector and a variable-diameter channel provided in the double-headed screw cylinder, the pressing member sleeved on the round steel body is extruded. Subsequently, the pressing cylinder with deformation grooves provided on the outer periphery will deform, and then extrude the round steel body to increase the friction force between the round steel body and the variable-diameter channel. Subsequently, two sections of round steel bodies can be connected together without using an open flame. At the same time, by the single method of increasing the friction force through extrusion, the anti-corrosion coating on the surface of the round steel body will not be damaged.

[0019] Furthermore, in the present invention, by providing a threaded cap included in the locking assembly and a sealing member provided on the threaded cap, when the threaded cap is threadedly connected to the double-headed screw cylinder, the two ends of the double-headed screw cylinder with openings are connected to the round steel body and sealed. Subsequently, the probability of soil solution entering the double-headed screw cylinder will be reduced, that is, the probability of soil solution entering the double-headed screw cylinder and corroding the separation cross-section of the two sections of round steel bodies is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic axonometric view of Embodiment 1 of the present invention;

[0021] Figure 2 It is a schematic sectional view of Embodiment 1 of the present invention;

[0022] Figure 3 It is a schematic sectional view of the connector of the present invention;

[0023] Figure 4 It is a schematic axonometric view of the pressing member of the present invention;

[0024] Figure 5 It is a schematic view of the locking assembly structure of Embodiment 1 of the present invention;

[0025] Figure 6 It is a schematic sectional view of the locking assembly structure of Embodiment 1 of the present invention;

[0026] Figure 7 It is a schematic axonometric view of Embodiment 2 of the present invention;

[0027] Figure 8 It is a schematic sectional view of Embodiment 2 of the present invention;

[0028] Figure 9 It is a schematic view of the locking assembly structure of Embodiment 2 of the present invention;

[0029] Figure 10Schematic cross-sectional structure diagram of the locking assembly according to Embodiment 2 of the present invention;

[0030] Markings in the figure: 1, round steel body; 2, locking assembly; 201, threaded nut; 202, seal; 2021, sealing ring; 2022, reduced diameter cylinder; 2023, clamping groove; 2024, clamping ring; 2025, sealing airbag; 2026, ventilation hole; 2027, sealing screw; 2028, docking nozzle; 2029, pressing plug column; 20210, pressing hole; 3, connecting piece; 301, double-headed screw barrel; 302, variable diameter channel; 303, threaded part; 4, pressing piece; 401, pressing cylinder; 402, deformation groove. Detailed implementation manners

[0031] To better understand the present invention, the content of the present invention will be further clarified below in conjunction with embodiments. However, the content of the present invention is not limited to the following embodiments.

[0032] <Embodiment 1>

[0033] As Figure 1 and Figure 2 shown, a threaded cone sleeve crimping connector for connecting round steel grounding bodies has a connecting piece 3 for pressing and connecting the round steel bodies 1 at both ends. Pressing pieces 4 are adapted to both ends of the connecting piece 3 to press the two round steel bodies 1 into the connecting piece 3, so that the two round steel bodies 1 are connected together without open fire, and the two round steel bodies 1 are connected by pressing and locking. The pressing piece 4 will not rotate and wear the surface of the round steel body 1, and will not cause a large change in the structure and surface shape of the round steel body 1, that is, it will not damage the anti-corrosion coating on the surface of the round steel body 1. Locking assemblies 2 are provided at both ends of the connecting piece 3. The two locking assemblies 2 are used to cooperate with the connecting piece 3 to position and press the pressing piece 4 in the connecting piece 3 to maintain the stable connection of the two round steel bodies 1, and the two locking assemblies 2 can seal both ends of the connecting piece 3 to resist the entry of soil solution, that is, reduce the corrosion of the disconnection surface of the two round steel bodies 1 by the soil solution.

[0034] As Figure 3 shown, the connecting piece 3 is a double-headed screw barrel 301 with a variable diameter channel 302 provided in the inner hole. Threaded parts 303 are provided at both ends of the head screw barrel 301. The inner diameter at the center of the variable diameter channel 302 is smaller than the inner diameters at both ends. Pressing pieces 4 are fitted to both ends of the variable diameter channel 302. As Figure 4As shown, the pressing member 4 is a pressing cylinder 401 with a smaller end and a larger end. Deformation grooves 402 are evenly formed on the pressing cylinder 401. Specifically, the narrow opening of the variable-diameter channel 302 is smaller than the narrow opening of the pressing cylinder 401. After the two pressing cylinders 401 are respectively inserted into the two ends of the variable-diameter channel 302, the two pressing cylinders 401 are deformed under the cooperation of the variable-diameter channel 302 to lock the two sections of round steel bodies 1 into the double-headed screw cylinder 301. Specifically, an elastic layer is provided on the surface of the pressing cylinder 401. The elastic layer can further reduce the damage to the anti-corrosion coating on the surface of the round steel body 1. At the same time, the double-headed screw cylinder 301 can cooperate with the two pressing cylinders 401 to adapt to connecting round steel bodies 1 with different thicknesses, and connect the two sections of round steel bodies 1 together without using an open flame.

[0035] As Figure 5 and Figure 6 shown, the locking assembly 2 is a threaded nut 201. The threaded nut 201 can cooperate with the threaded portion 303 with an external thread to push the two pressing cylinders 401 to drive the corresponding two sections of round steel bodies 1 into the double-headed screw cylinder 301. At the same time, the threaded connection between the two threaded portions 303 and the two threaded nuts 201 can lock the relative positions of the pressing cylinders 401 in the double-headed screw cylinder 301 to stably connect the two round steel bodies 1. A seal 202 is provided on the threaded nut 201. The seal 202 includes a reduced-diameter cylinder 2022 fixedly arranged on the threaded nut 201. The reduced-diameter cylinder 2022 is arranged away from the double-headed screw cylinder 301, and a sealing ring 2021 is fixedly arranged on the inner wall of the reduced-diameter cylinder 2022. The sealing ring 2021 can press against the surface of the round steel body 1 to cooperate with the threaded connection between the threaded nut 201 and the double-headed screw cylinder 301, close the two ends of the double-headed screw cylinder 301, and reduce the probability of soil solution entering, that is, reduce the probability of soil solution damaging the round steel body 1.

[0036] As Figure 3 , Figure 5 and Figure 6 shown, the outer surface of the double-headed screw cylinder 301 is hexagonal, so that the staff can use a wrench to clamp the double-headed screw cylinder 301. The outer surface of the threaded nut 201 is hexagonal, so that the staff can clamp the threaded nut 201 through a wrench. That is, the staff can use two wrenches to clamp the threaded nut 201 and the double-headed screw cylinder 301, and then screw the threaded nut 201 tightly onto the double-headed screw cylinder 301 to complete the connection of the two round steel bodies 1 without using an open flame.

[0037] In specific use, first, two threaded caps 201 and a reduced-diameter cylinder 2022 are sleeved on two round steel bodies 1. Subsequently, a pressing cylinder 401 with a deformation groove 402 is sleeved on the two round steel bodies 1. Next, the two round steel bodies 1 and the corresponding pressing cylinders 401 are successively and separately fed into the two ends inside a double-headed screw cylinder 301. After a pressing cylinder 401 and a round steel body 1 are fed into the reduced-diameter channel 302 inside the double-headed screw cylinder 301, a wrench can be used to cooperate with the outer surface of the double-headed screw cylinder 301 and the outer surface of the threaded cap 201 to thread-connect the double-headed screw cylinder 301 and the threaded cap 201. During the connection process, the threaded cap 201 will press against the pressing cylinder 401 to tightly connect the double-headed screw cylinder 301 and the corresponding round steel body 1. After repeating the operation, the two round steel bodies 1 can be stably connected together. At the same time, the sealing ring 2021 arranged inside the threaded cap 201 will also seal the round steel body 1, thereby reducing the probability of soil solution entering the double-headed screw cylinder 301 to corrode the round steel body 1.

[0038] <Example 2>

[0039] Such as Figure 7 And Figure 8As shown in the figure, the difference between this embodiment and Embodiment 1 is that on the inner wall of the necked-down cylinder 2022 included in the seal 202, there is a sealing airbag 2025. The sealing airbag 2025 is arranged in an L shape. The outer periphery of the sealing airbag 2025 is communicated with a vent hole 2026 vertically penetrating the threaded cap 201. The vent hole 2026 is communicated with a pressing hole 20210 opened on the threaded cap 201. A sealing screw 2027 is threadedly connected to the center of the vent hole 2026 away from the threaded cap 201 to unidirectionally communicate the pressing hole 20210 with the sealing airbag 2025. And a pressing plug 2029 slides in the pressing hole 20210. When the threaded cap 201 and the double-headed screw barrel 301 are tightly screwed together, the pressing plug 2029 will be restricted by the stepped table surface of the threaded part 303 opened on the double-headed screw barrel 301. Subsequently, the pressing plug 2029 will squeeze the air in the pressing hole 20210, so that the air enters the sealing airbag 2025 through the vent hole 2026. Then, the sealing airbag 2025 expands to press against the double-headed screw barrel 301 and the round steel body 1, so as to seal the double-headed screw barrel 301 and give an axial force to the threaded cap 201 at the same time. At the same time, the air pressure will also press the pressing plug 2029 to cooperate with the stepped table surface of the double-headed screw barrel 301, that is, the double-headed screw barrel 301 is larger than the outer peripheral surface of the threaded cap 201, to further maintain the axial force given to the threaded cap 201. Preferably, the end surface of the pressing plug 2029 passing through the pressing hole 20210 is provided with a frosted layer, and the frosted layer can increase the force required to unscrew the threaded cap 201 from the double-headed screw barrel 301, that is, improve the stability of connecting the round steel body 1. Subsequently, the probability of the threaded cap 201 loosening from the double-headed screw barrel 301 can be reduced, that is, the stability of connecting the two sections of the round steel body 1 is improved. And the expansion of the sealing airbag 2025 can adapt to the round steel bodies 1 of different thicknesses within a certain range, and the expanded sealing airbag 2025 will also more stably block the two ends of the double-headed screw barrel 301, further reducing the probability of the soil solution entering and corroding the disconnection surface of the two sections of the round steel body 1.

[0040] The setting of the sealing screw 2027 can facilitate the staff to adjust the inflation amount of the sealing airbag 2025, so as to adapt to different round steel bodies 1 for use. At the same time, it can also make the sealing airbag 2025 shrink to check whether the soil solution seeps into the connection between the double-headed screw barrel 301 and the threaded cap 201 without disassembling the threaded cap 201, and it can also facilitate the staff to clean the pressing hole 20210 and the vent hole 2026.

[0041] Such as Figure 9 and Figure 10As shown, there are multiple vent holes 2026 and pressing holes 20210, and they are evenly distributed at the top corners of the threaded cap 201 with a hexagonal outer surface. The arrangement of the multiple pressing holes 20210 and vent holes 2026 can cooperate with the multiple pressing plug columns 2029 provided to provide a basis for the uniform expansion of the sealing airbag 2025, enabling the sealing airbag 2025 to uniformly expand and stably block the double-headed screw barrel 301. At the same time, it can also provide a strong and uniform axial force for the threaded cap 201, thereby reducing the loosening of the round steel body 1 caused by the loosening of the threaded cap 201, and further reducing the possibility of soil solution entering and corroding the round steel body 1 due to loosening.

[0042] On the horizontal and vertical sections of the inner wall of the necking cylinder 2022 corresponding to the sealing airbag 2025, there are clamping grooves 2023 provided. On the inner walls of the horizontal and vertical sections of the L-shaped sealing airbag 2025 close to the threaded cap 201, there are clamping rings 2024 provided. The clamping rings 2024 and the clamping grooves 2023 are both annularly arranged. And on the outer peripheral surface of the vertical part of the sealing airbag 2025, there are multiple docking nozzles 2028 evenly provided. The multiple docking nozzles 2028 correspond to the multiple vent holes 2026, and the vent holes 2026 are hermetically clamped with the docking nozzles 2028 near the sealing airbag 2025, which is convenient for the staff to disassemble and replace the sealing airbag 2025, thus improving the service life of the structure to a certain extent.

[0043] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A threaded cone sleeve crimping connector for connecting a round steel grounding body, characterized in that: It comprises a connecting piece (3) for connecting a round steel body (1); the connecting piece (3) comprises a double-ended screw barrel (301) with a variable diameter channel (302) inside, the inner diameter at the center of the variable diameter channel (302) is smaller than the inner diameter at both ends, and both ends of the double-ended screw barrel (301) are provided with threaded parts (303); The pressing member (4) comprises a conical pressing cylinder (401) with a deformation groove (402) provided on the outer circumference; The locking assembly (2) comprises a threaded cap (201) threadedly connected to the threaded portion (303), and a sealing member (202) is provided at the end of the threaded cap (201) facing away from the stud barrel (301).

2. A threaded cone sleeve crimping connector for round steel grounding body connection as claimed in claim 1, characterized in that: The sealing member (202) comprises a shrinking tube (2022) fixedly arranged at the outer end of the threaded cap (201); the outer wall of the shrinking tube (2022) is fixedly connected to the inner wall of the threaded cap (201); and a sealing ring (2021) is fixedly arranged on the inner ring of the shrinking tube (2022).

3. A threaded cone sleeve crimping connector for round steel grounding body connection as claimed in claim 1, characterized in that: The outer circumferences of both ends of the double-ended screw barrel (301) are larger than the threaded cap (201), and the sealing member (202) comprises a necking barrel (2022) fixedly mounted on the threaded cap (201), an annular sealing airbag (2025) is arranged on the inner ring of the necking barrel (2022), the sealing airbag (2025) is communicated with a vent hole (2026) on the threaded cap (201), and the vent hole (2026) is arranged along the radial direction of the threaded cap (201). The vent hole (2026) is connected to a top pressure hole (20210) provided on the threaded cap (201); the top pressure hole (20210) is axially arranged along the threaded cap (201); a top pressure plug (2029) is slidably arranged in the top pressure hole (20210); one end of the top pressure plug (2029) passes through the top pressure hole (20210) so as to squeeze the air in the top pressure hole (20210) into the sealing airbag (2025) after being pressurized.

4. A threaded cone sleeve crimping connector for round steel grounding body connection as claimed in claim 3, characterized in that: The vent hole (2026) is arranged along the radial direction of the threaded cap (201) and penetrates the threaded cap (201). The vent hole (2026) is threadedly connected to a sealing screw (2027) at a position away from the sealing airbag (2025).

5. A threaded cone sleeve crimping connector for round steel grounding body connection as claimed in claim 3, characterized in that: The cross-section of the sealing airbag (2025) after inflation is L-shaped, a clamping ring (2024) is fixedly provided on the outer wall of the sealing airbag (2025), the clamping ring (2024) is clamped with a clamping groove (2023) provided on the inner wall of the shrinking tube (2022), and a docking nozzle (2028) is provided on the outer periphery of the sealing airbag (2025) corresponding to the vent hole (2026), and the docking nozzle (2028) is clamped with the vent hole (2026).

6. A threaded cone sleeve crimping connector for round steel grounding body connection as claimed in claim 3, characterized in that: The threaded cap (201) is hexagonal in shape, and has six vent holes (2026) and six top pressure holes (20210). The six vent holes (2026) and six top pressure holes (20210) are respectively arranged at six top corners of the threaded cap (201).

7. A threaded cone sleeve crimping connector for round steel grounding body connection as claimed in claim 3, characterized in that: The end of the pressing plug (2029) passing through the pressing hole (20210) is provided with a frosted layer.

8. A threaded cone sleeve crimping connector for round steel grounding body connection as claimed in claim 1, characterized in that: The narrow opening of the variable diameter channel (302) is smaller than the narrow opening of the compacting cylinder (401).

9. A threaded cone sleeve crimping connector for round steel grounding body connection as claimed in claim 1, characterized in that: The outer circumference of the double-ended screw barrel (301) is hexagonal.

10. A threaded cone sleeve crimping connector for round steel grounding body connection as claimed in claim 1, characterized in that: An elastic layer is provided on the surface of the compression cylinder (401).

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