Connecting piece for power transmission and distribution ground screen construction without fire

Abstract

The invention discloses a connecting piece for construction of a power transmission and distribution ground grid without fire. The connecting piece comprises two butt joint pieces and a locking piece capable of connecting the two butt joint pieces together. The butt joint piece comprises an inner sleeve and an outer sleeve, the inner sleeve comprises a butt joint part, a conical part and an external thread part located between the butt joint part and the conical part, the large-diameter end of the conical part is connected with the external thread part, and a deformation seam is formed in the periphery of the conical part; the inner cavity of the outer sleeve is provided with an inner thread part matched with the outer thread part of the inner sleeve and an inner conical hole matched with the conical part, and the small diameter of the inner conical hole is smaller than that of the conical part. The problem that in the prior art, a process of connecting a round steel grounding body without fire can damage an anti-corrosion coating is solved.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution network line connection, and in particular to a non-fire construction connector for a power transmission and distribution ground network. Background Art

[0002] In many environments where power transmission lines are located, such as forests, grasslands, and mountainous areas, there are a lot of flammable materials around. Open flames and high-temperature sparks generated by hot work construction can easily cause fires, resulting in significant loss of life and property and ecological damage. For example, during the forest fire prevention period, if the grounding operation of mountain power transmission lines causes a forest fire, the consequences will be disastrous. Therefore, how to achieve non-hot work construction of overhead power transmission line grounding grids has become an urgent problem to be solved, such as the technical solution recorded in Reference 1:

[0003] Reference 1: Chinese patent document with publication number CN 220306656 U

[0004] Reference 1 records a new type of non-fire and non-crimping grounded round steel connection device, which relates to the field of power hardware technology, including a connection mechanism capable of connecting at least two grounded round steels, the connection mechanism being electrically conductive with all the grounded round steels that cooperate with it, and each of the grounded round steels being detachably connected to the connection mechanism. The connection mechanism in the connection device is electrically conductive with all the grounded round steels that cooperate with it, and each of the grounded round steels is detachably connected to the connection mechanism. During installation, it can be tightened with an ordinary wrench, which is simple and convenient, does not require welding or crimping, can meet the requirements of construction during the forest fire prevention period, and improves construction efficiency.

[0005] The above-mentioned connection device can realize the non-fire operation construction of the ground grid, but it cannot adapt to environmental changes. When the ambient temperature changes greatly, the round steel grounding body is prone to breakage or loosening due to thermal expansion and contraction due to changes in ambient temperature, affecting the grounding effect of the ground grid. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that the process of non-fire connection of round steel grounding bodies in the prior art will damage the anti-corrosion coating, and to provide a non-fire construction connector for a power transmission and distribution grounding network.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: a power transmission and distribution ground grid non-fire construction connector, comprising two butt joints and a locking member capable of connecting the two butt joints together;

[0008] The docking part includes an inner sleeve and an outer sleeve. The inner sleeve includes a docking portion, a tapered portion, and an external thread portion located between the docking portion and the tapered portion. The large-diameter end of the tapered portion is connected to the external thread portion, and a deformation seam is provided on the outer periphery of the tapered portion. The inner cavity of the outer sleeve has an internal thread portion that cooperates with the external thread portion of the inner sleeve and an internal tapered hole that cooperates with the tapered portion, and the small diameter of the internal tapered hole is smaller than the small diameter of the tapered portion.

[0009] As a further optimization of the non-fire construction connector for the power transmission and distribution ground grid of the present invention: The locking part includes a threaded cylinder, and the threaded cylinder is threadedly connected to the docking portion.

[0010] As a further optimization of the non-fire construction connector for the power transmission and distribution ground grid of the present invention: The locking part includes a flange plate fixedly provided on the docking portion and a plurality of bolts connecting the flange plate.

[0011] As a further optimization of the non-fire construction connector for the power transmission and distribution ground grid of the present invention: The locking part includes a strain block for thermal expansion and contraction with the round steel body. A communication cylinder vertically penetrating it is provided on the strain block. First strain columns and second strain columns are respectively provided on the opposite side surfaces of the strain block along the penetrating direction of the communication cylinder. The first strain column and the second strain column are perpendicular to each other, and connecting arms are provided at the ends of the first strain column and the second strain column. One end of the connecting arm is connected to the first strain column or the second strain column, and the other end crosses the strain block and is connected to a fixing nail on the docking portion of the opposite docking part.

[0012] As a further optimization of the non-fire construction connector for the power transmission and distribution ground grid of the present invention: Each of the fixing nails is connected to two connecting arms. One ends of the two connecting arms are connected to the fixing nail, and the other ends of the two connecting arms both cross the strain block and are connected to the ends of the two first strain columns or the second strain columns. The two first strain columns are located on both sides of the communication cylinder, and the two second strain columns are located on both sides of the communication cylinder.

[0013] As a further optimization of the non-fire construction connector for the power transmission and distribution ground grid of the present invention: Both ends of the communication cylinder slide in the two docking portions respectively.

[0014] As a further optimization of the non-fire construction connector for the power transmission and distribution ground grid of the present invention: Reinforcing bars are provided at the joints of the strain block with the first strain column and the second strain column.

[0015] As a further optimization of the non-fire construction connector for the power transmission and distribution ground grid of the present invention: The thermal expansion coefficient of the strain block is greater than or equal to the thermal expansion coefficient of the round steel body.

[0016] As a further optimization of the non-fire construction connector for the power transmission and distribution ground grid of the present invention: The narrow opening of the tapered portion is larger than the narrow opening of the internal tapered hole.

[0017] As a further optimization of the non - fire - construction connector for the power transmission and distribution ground grid of the present invention: an elastic layer is provided on the outer surface of the conical portion.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, by setting the locking member, two inner sleeves are connected together. Subsequently, by setting the external thread portion and the internal thread portion, the outer sleeve and the inner sleeve are connected together. Then, the inner conical hole included in the outer sleeve will squeeze the conical portion included in the inner sleeve. When the conical portion is squeezed, it will cooperate with the deformation seam opened on the conical portion to cause the conical portion to deform and firmly squeeze the round steel body, so as to maintain the stability of the conical portion and the conical portion locking the round steel body. When the conical portion deforms and squeezes the round steel body, there is only the locking top pressure, and the force of the top pressure will not cause large - area deformation of the round steel body. Therefore, it will neither wear the anti - corrosion coating on the surface of the round steel body nor cause deformation and damage to the anti - corrosion coating due to the deformation of the squeezed round steel body. That is, on the basis of maintaining the stability of connecting two sections of round steel bodies without fire, the degree of damage to the anti - corrosion coating on the surface of the round steel body can be reduced.

[0020] Furthermore, in the present invention, the strain block included in the locking member is set as the power source, and it cooperates with the first strain column, the second strain column arranged on both sides of the strain block, the connecting arm passing over the strain block, and the fixing nail fixedly arranged on the docking member to adjust the distance between the two docking members to adapt to the deformation amount of the round steel body due to thermal expansion and contraction, so as to reduce the probability that the round steel body loosens from the docking member and the locking member due to thermal expansion and contraction deformation, and at the same time, reduce the probability of breakage or relaxation of the two sections of round steel bodies. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 It is a schematic sectional view of Embodiment 1 of the present invention;

[0023] Figure 3 It is a schematic sectional view of the inner sleeve of the present invention;

[0024] Figure 4 It is a schematic sectional view of the outer sleeve of the present invention;

[0025] Figure 5 It is a schematic axonometric view of Embodiment 3 of the present invention;

[0026] Figure 6 It is a schematic sectional view of Embodiment 3 of the present invention;

[0027] Figure 7 It is a schematic axonometric view of the locking member of Embodiment 3 of the present invention;

[0028] Markings in the figure: 1. Round steel body; 2. Docking part; 201. Deformation joint; 202. Conical part; 203. External thread part; 204. Outer sleeve; 205. Inner conical hole; 206. Inner thread part; 207. Inner sleeve; 208. Docking part; 3. Locking part; 301. Connecting arm; 302. First strain column; 303. Reinforcing strip; 304. Strain block; 305. Fixing nail; 306. Connecting cylinder; 307. Threaded cylinder; 308. Second strain column. Specific implementation mode

[0029] To better understand the present invention, the content of the present invention will be further clarified below in conjunction with embodiments, but the content of the present invention is not limited to the following embodiments.

[0030] <Embodiment 1>

[0031] As Figure 1 shown, a power transmission and distribution ground grid non-open-fire construction connecting piece has docking parts 2 that are symmetrically arranged and connected at opposite ends through a locking part 3. The two docking parts 2 are used to connect two sections of round steel bodies 1 together in a non-open-fire manner.

[0032] As Figure 3 and Figure 4 shown, the docking part 2 includes an outer sleeve 204 and an inner sleeve 207. The inner sleeve 207 includes a docking part 208, a conical part 202, and an external thread part 203 located between the docking part 208 and the conical part 202. The large-diameter end of the conical part 202 is connected to the external thread part 203, so that the outer sleeve 204 can be easily sleeved onto the inner sleeve 207. The external thread part 203 can be threadedly connected to the inner thread part 206 included in the inner sleeve 207 to stably connect the two sections of round steel bodies 1 by the cooperation of the outer sleeve 204 and the inner sleeve 207. Specifically, the outer sleeve 204 is hexagonal, so that the outer sleeve 204 can assist the staff to use a wrench to threadedly connect the external thread part 203 and the inner thread part 206, that is, to maintain the stability of the connection of the two round steel bodies 1. Four deformation joints 201 are evenly arranged on the outer periphery of the conical part 202. The deformation joints 201 can cause the conical part 202 to deform to a certain extent, so that when the inner thread part 206 and the external thread part 203 are threadedly connected, the conical part 202 of the inner thread part 206 presses and locks the round steel body 1 to maintain the stability of the non-open-fire connection of the two round steel bodies 1. At the same time, the round steel body 1 is locked only by a force that does not cause the round steel body 1 to deform, and the structure of the round steel body 1 will not be changed, so the anti-corrosion coating on the surface of the round steel body 1 will not be damaged. At the same time, the relative rotation between the conical part 202 and the round steel body 1 is small, so the anti-corrosion coating will not be worn.

[0033] The narrow opening of the tapered portion 202 is larger than that of the inner tapered hole 205, so that the outer sleeve 204 can apply sufficient extrusion pressure to the tapered portion 202. At the same time, it can be used to adapt to round steel bodies 1 of different thicknesses to a certain extent, that is, the tapered portion 202 and the inner tapered hole 205 can cooperate to stably clamp the round steel body 1. And the flared end of the inner tapered hole 205 can correspond to the narrow end of the tapered portion 202 first, which is convenient for the staff to put the outer sleeve 204 on the inner sleeve 207. And the outer periphery of the outer sleeve 204 is a hexagonal structure, so that the staff can use a wrench to cooperate with the outer sleeve 204 to thread the internal thread portion 206 and the external thread portion 203. An elastic layer is provided on the outer periphery of the tapered portion 202. The elastic layer can protect the anti-corrosion coating on the outer periphery of the round steel body 1 and can adapt to thermal expansion and contraction to maintain the connection stability between the round steel body 1, the docking member 2 and the locking member 3.

[0034] The locking member 3 includes a threaded cylinder 307. The threaded cylinder 307 is threadedly connected to the docking portion 208 to connect two docking members 2 together. Subsequently, the round steel bodies 1 connected to both docking members 2 can be stably connected together without using open fire.

[0035] As Figure 2 shown, in specific use, first, the outer sleeves 204 included in both locking members 3 are respectively sleeved on two sections of round steel bodies 1. Then, the two sections of round steel bodies 1 are respectively passed through the two inner sleeves 207 connected to the threaded cylinder 307. Next, a wrench can be used to rotate the two outer sleeves 204 to make the internal thread portions 206 included in both outer sleeves 204 engage with the internal thread portions 206 included in both inner sleeves 207. After the internal thread portion 206 and the external thread portion 203 are tightened, the tapered portions 202 included in both outer sleeves 204 will squeeze the tapered portions 202 included in both inner sleeves 207, and squeeze the round steel body 1 with the cooperation of the deformation slits 201 opened on both tapered portions 202 to maintain the stable connection between the two round steel bodies 1 and the docking member 2, that is, the process of stably connecting the two round steel bodies 1 together without using open fire is completed.

[0036] <Example 2>

[0037] Different from Example 1, the docking member 2 includes a flange plate fixedly arranged on the docking portion 208. The two flange plates are fixedly connected together by a plurality of bolts. Then the two inner sleeves 207 will be fixedly connected together. Subsequently, the two sections of round steel bodies 1 can be docked together without using open fire in cooperation with the two outer sleeves 204.

[0038] <Example 3>

[0039] As Figure 5 、 Figure 6 and Figure 7As shown, different from the embodiment 1, the locking member 3 includes a strain block 304 for synchronously expanding and contracting with the round steel body 1. Preferably, the material of the strain block 304 is the same as that of the round steel body 1, that is, the round steel body 1 and the strain block 304 have the same thermal expansion and contraction coefficients. The strain block 304 is provided with a connecting tube 306 that vertically penetrates the strain block 304. The connecting tube 306 is made of the same material as the round steel body 1 and can make the two sections of the round steel body 1 electrically connected to maintain the conductive function of the two sections of the round steel body 1. The opposite sides of the strain block 304 penetrated by the connecting tube 306 are respectively provided with a first strain column 302 and a second strain column 308. The first strain column 302 and the second strain column 308 are respectively provided. The ends are each provided with a connecting arm 301, which passes over the strain block 304 and is connected to a fixing nail 305 provided on the docking portion 208, so that the strain block 304 serves as a power source to cooperate with the connecting arm 301 and the fixing nail 305 to adjust the distance between the two inner sleeves 207, so that the spacing between the two connected sections of the round steel body 1 can be adjusted, that is, when the two round steel bodies 1 expand due to a hot environment, the two round steel bodies 1 are tightened to maintain the tension of the two round steel bodies 1, and when the two round steel bodies 1 shrink due to a cold environment, the two round steel bodies 1 can be relaxed to reduce the probability of the round steel body 1 breaking due to the shrinkage degree being greater than the deformation limit of the material of the round steel body 1.

[0040] Specifically, any fixing nail 305 is connected to two connecting arms 301, and the two connecting arms 301 are connected to a first strain column 302 or a second strain column 308 across the strain block 304 at the positions away from the corresponding fixing nail 305. The two first strain columns 302 and the two second strain columns 308 are perpendicular to each other, and the two first strain columns 302 and the two second strain columns 308 are respectively arranged in parallel, so that one fixing nail 305, the corresponding two connecting arms 301, and the corresponding two first strain columns 302 or the second strain columns 308 are triangular in shape, and the first strain column 302 and the second strain column 308 are fixedly connected to the strain block 304 through the reinforcing strip 303. When the strain block 304 expands and pushes the two groups of strain columns away from each other, the triangular connecting strip 303 is formed. The connection arm 301, the fixing pin 305, the two first strain columns 302 and the two second strain columns 308 cooperate to make the two inner sleeves 207 close to the strain block 304, that is, the two sections of the round steel body 1 stably connected by the inner sleeve 207 and the outer sleeve 204 are close to each other. When the strain block 304 contracts and makes the two first strain columns 302 and the second strain column 308 close to each other, the connection arm 301 and the fixing pin 305 cooperate to make the two inner sleeves 207 away from the strain block 304, that is, the two sections of the round steel body 1 stably connected by the inner sleeve 207 and the outer sleeve 204 are away from each other, thereby reducing the breakage of the two sections of the round steel body 1 due to thermal expansion and contraction, and also reducing the probability of the outer sleeve 204 and the locking member 3 being loosened due to force changes.

[0041] The connecting cylinder 306 can be slidably mated with two corresponding docking parts 208 to adapt to the distance adjustment of the strain block 304 for the two docking parts 2, while maintaining the protection and power-on effect on the round steel body 1. The spiral directions of the two external thread parts 203 are opposite, so that it is convenient for the staff to use two wrenches to cooperate with the hexagonal shapes of the two inner sleeves 207 to tighten the two external thread parts 203 onto the two internal thread parts 206.

[0042] 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 power transmission and distribution ground grid non-fire construction connector, characterized in that: It comprises two butt joints (2) and a locking member (3) capable of connecting the two butt joints (2) together; The docking piece (2) comprises an inner sleeve (207) and an outer sleeve (204); the inner sleeve (207) comprises a docking portion (208), a tapered portion (202), and an external threaded portion (203) located between the docking portion (208) and the tapered portion (202); the large diameter end of the tapered portion (202) is connected to the external threaded portion (203); a deformation slit (201) is provided on the outer periphery of the tapered portion (202); the inner cavity of the outer sleeve (204) comprises an internal threaded portion (206) matched with the external threaded portion (203) of the inner sleeve (207) and an inner tapered hole (205) matched with the tapered portion (202); and the minor diameter of the inner tapered hole (205) is smaller than the minor diameter of the tapered portion (202).

2. A power transmission and distribution ground grid non-fire construction connector as claimed in claim 1, characterized in that: The locking member (3) comprises a threaded barrel (307), and the threaded barrel (307) is threadedly connected to the docking portion (208).

3. A power transmission and distribution ground grid non-fire construction connector as claimed in claim 1, characterized in that: The locking member (3) comprises a flange fixed on the docking portion (208) and a plurality of bolts connecting the flange.

4. A power transmission and distribution ground grid non-fire construction connector as claimed in claim 1, characterized in that: The locking member (3) comprises a strain block (304) for thermal expansion and contraction with the round steel body (1); a connecting tube (306) is provided on the strain block (304) and vertically penetrates the strain block; a first strain column (302) and a second strain column (308) are respectively provided on opposite sides of the strain block (304) along the penetration direction of the connecting tube (306); the first strain column (302) and the second strain column (308) are perpendicular to each other; and connecting arms (301) are provided at the ends of the first strain column (302) and the second strain column (308); one end of the connecting arm (301) is connected to the first strain column (302) or the second strain column (308), and the other end passes over the strain block (304) and is connected to a fixing nail (305) on a docking portion (208) of the docking member (2).

5. A power transmission and distribution ground grid non-fire construction connector as claimed in claim 4, characterized in that: Any of the fixing pins (305) is connected to two connecting arms (301), one end of the two connecting arms (301) is connected to the fixing pin (305), and the other ends of the two connecting arms (301) pass through the strain block (304) and are connected to the ends of two first strain columns (302) or second strain columns (308), the two first strain columns (302) are located on both sides of the connecting tube (306), and the two second strain columns (308) are located on both sides of the connecting tube (306).

6. A power transmission and distribution ground grid non-fire construction connector as claimed in claim 4, characterized in that: The two ends of the connecting tube (306) slide in the two docking parts (208) respectively.

7. A power transmission and distribution ground grid non-fire construction connector as claimed in claim 4 or 5, characterized in that: Reinforcement strips (303) are provided at the connection points between the strain block (304) and the first strain column (302) and the second strain column (308).

8. A power transmission and distribution ground grid non-fire construction connector as claimed in claim 1, characterized in that: The thermal expansion coefficient of the strain block (304) is greater than or equal to the thermal expansion coefficient of the round steel body (1).

9. A power transmission and distribution ground grid non-fire construction connector as claimed in claim 1, characterized in that: The narrow opening of the tapered portion (202) is larger than the narrow opening of the inner tapered hole (205).

10. A power transmission and distribution ground grid non-fire construction connector as claimed in claim 1, characterized in that: An elastic layer is provided on the outer surface of the tapered portion (202).

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