A connection piece for power transmission and distribution ground net non-moving fire construction

Abstract

The application discloses a power transmission and distribution ground net non-movable fire construction connecting piece, two butt joints and a locking piece capable of connecting the two butt joints together; the butt joint comprises an inner sleeve and an outer sleeve; the inner sleeve comprises a butt joint portion, a conical portion and an outer thread portion located between the butt joint portion and the conical portion; the large-diameter end of the conical portion is connected with the outer thread portion; a deformation joint is formed in the outer periphery of the conical portion; the inner cavity of the outer sleeve is provided with an inner thread portion matched with the outer thread portion of the inner sleeve and an inner taper hole matched with the conical portion, and the small diameter of the inner taper hole is smaller than that of the conical portion. The problem that the anticorrosion coating is damaged in the process of connecting the round steel grounding body without movable fire in the prior art is solved.

Description

Technical Field

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

[0002] Many transmission lines are located in environments such as forests, grasslands, and mountainous areas, where a large number of flammable materials are present. Open flames and high-temperature sparks generated by hot work can easily cause fires, resulting in significant loss of life and property, and ecological damage. For example, during the forest fire prevention period, grounding operations on mountain transmission lines could cause a forest fire, with disastrous consequences. Therefore, achieving hot work-free construction of overhead transmission line grounding grids has become an urgent issue, such as the technical solution described in Reference 1:

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

[0004] Reference 1 describes a novel, non-flammable, non-crimping grounded round steel connection device, relating to the field of electrical hardware technology. The device comprises a connecting mechanism capable of connecting at least two grounded round steel bars, wherein the connecting mechanism is electrically conductive with all of the mating grounded round steel bars, and each of the grounded round steel bars is detachably connected to the connecting mechanism. The connecting mechanism in this connection device is electrically conductive with all of the mating grounded round steel bars, and each of the grounded round steel bars is detachably connected to the connecting mechanism. During installation, the connecting mechanism can be tightened with a standard wrench, making it simple and convenient, without the need for welding or crimping. This device meets the requirements for construction during forest fire prevention periods 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 thermal expansion and contraction due to the change in ambient temperature, resulting in breakage or loosening, 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 connecting round steel grounding bodies without fire in the prior art will damage the anti-corrosion coating, and to provide a power transmission and distribution grounding network without fire construction connection piece.

[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 piece includes an inner sleeve and an outer sleeve. The inner sleeve includes a docking portion, a tapered portion, and an external threaded portion located between the docking portion and the tapered portion. The large diameter end of the tapered portion is connected to the external threaded 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 threaded portion that cooperates with the external threaded portion of the inner sleeve and an inner tapered hole that cooperates with the tapered portion, and the minor diameter of the inner tapered hole is smaller than the minor diameter of the tapered portion.

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

[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 member includes a flange fixed on the docking portion and a plurality of bolts connecting the flange.

[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 expanding and contracting with the round steel body, and the strain block is provided with a connecting tube that vertically penetrates it. The strain block is provided with a first strain column and a second strain column on opposite sides along the penetration direction of the connecting tube. The first strain column and the second strain column are perpendicular to each other, and the ends of the first strain column and the second strain column are provided with connecting arms, one end of the connecting arm is connected to the first strain column or the second strain column, and the other end passes over the strain block and is connected to the fixing nail on the docking part of the relative docking member.

[0012] As a further optimization of the non-fire construction connector of the power transmission and distribution ground grid of the present invention: any of the fixing nails is connected to two connecting arms, one end of the two connecting arms is connected to the fixing nail, and the other ends of the two connecting arms pass through 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 connecting tube, and the two second strain columns are located on both sides of the connecting tube.

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

[0014] As a further optimization of the power transmission and distribution ground grid non-fire construction connection piece of the present invention: reinforcement strips are provided at the connections between the strain block and the first strain column and the second strain column.

[0015] As a further optimization of the power transmission and distribution ground grid non-fire construction connector 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 power transmission and distribution ground grid non-fire construction connector of the present invention: the narrow opening of the tapered portion is larger than the narrow opening of the inner tapered hole.

[0017] As a further optimization of the connecting piece for the construction of the power transmission and distribution grounding grid without fire, the outer surface of the conical part is provided with an elastic layer.

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

[0019] The two inner sleeves are connected together by the locking piece, then the outer sleeve and the inner sleeve are connected together by the outer threaded part and the inner threaded part, then the inner tapered hole of the outer sleeve extrudes the conical part of the inner sleeve, the conical part is extruded to cooperate with the deformation seam on the conical part to deform and stably extrude the round steel body, so as to maintain the stability of the conical part and the round steel body, the conical part deforms and extrudes the round steel body only with locking top pressure, and the force of the top pressure will not cause large-area deformation of the round steel body, so that the anticorrosive coating on the surface of the round steel body is not worn and the anticorrosive coating is not deformed and damaged due to the deformation of the extruded round steel body, that is, the degree of damage to the anticorrosive coating on the surface of the round steel body is reduced on the basis of maintaining the stability of the connection between the two round steel bodies without fire.

[0020] Further, the strain block of the locking piece is used as a power source, and the first strain column and the second strain column on both sides of the strain block, the connecting arm across the strain block, and the fixed nail fixed on the abutting piece are used to control the distance between the two abutting pieces to adapt to the deformation amount of the round steel body due to thermal expansion and cold contraction, so as to reduce the probability of the round steel body being loosened from the abutting piece and the locking piece due to thermal expansion and cold contraction deformation, and also reduce the probability of the two round steel bodies being broken or relaxed. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure schematic view of the shaft side of embodiment 1 of the present application;

[0022] Figure 2 It is a structure schematic view of the cross section of embodiment 1 of the present application;

[0023] Figure 3 It is a structure schematic view of the cross section of the inner sleeve of the present application;

[0024] Figure 4 It is a structure schematic view of the cross section of the outer sleeve of the present application;

[0025] Figure 5 It is a structure schematic view of the shaft side of embodiment 3 of the present application;

[0026] Figure 6 It is a structure schematic view of the cross section of embodiment 3 of the present application;

[0027] Figure 7 It is a structure schematic view of the shaft side of the locking piece of embodiment 3 of the present application;

[0028] Markings in the figure: 1. Round steel body; 2. Docking part; 201. Deformation seam; 202. Tapered part; 203. External threaded part; 204. Outer sleeve; 205. Inner tapered hole; 206. Internal threaded part; 207. Inner sleeve; 208. Docking part; 3. Locking part; 301. Connecting arm; 302. First strain column; 303. Reinforcement strip; 304. Strain block; 305. Fixing nail; 306. Connecting tube; 307. Threaded tube; 308. Second strain column. DETAILED DESCRIPTION

[0029] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with examples, but the content of the present invention is not limited to the following examples.

[0030] <Example 1>

[0031] like Figure 1 As shown, a power transmission and distribution ground grid non-flammable construction connector has docking pieces 2 symmetrically arranged and connected at opposite ends by locking pieces 3. The two docking pieces 2 are used to connect two sections of round steel bodies 1 together in a non-flammable manner.

[0032] like Figure 3 and Figure 4 As shown, the docking member 2 includes an outer sleeve 204 and an inner sleeve 207. The inner sleeve 207 includes 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 so that the outer sleeve 204 can be easily sleeved onto the inner sleeve 207. The external threaded portion 203 can be threadedly connected with the internal threaded portion 206 included in the inner sleeve 207, so that the outer sleeve 204 and the inner sleeve 207 cooperate to stably connect the two sections of the round steel body 1. Specifically, the outer sleeve 204 is hexagonal, so that the outer sleeve 204 can assist the staff in using a wrench to connect the external threaded portion 203 with the internal threaded portion 206. The threaded connection maintains the stability of the connection between the two round steel bodies 1. Four deformation seams 201 are evenly arranged on the outer circumference of the tapered portion 202. The deformation seams 201 can deform the tapered portion 202 to a certain extent, so that when the internal threaded portion 206 is threadedly connected to the external threaded portion 203, the tapered portion 202 of the internal threaded portion 206 presses and locks the round steel body 1, so as to maintain the stability of the non-fire connection between the two round steel bodies 1. At the same time, the round steel body 1 is locked only by a force that does not deform the round steel body 1, 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 of the tapered portion 202 and the round steel body 1 is less, so the anti-corrosion coating will not be worn.

[0033] The narrow mouth of the tapered portion 202 is larger than the narrow mouth of the inner tapered hole 205, so that the outer sleeve 204 can give the tapered portion 202 sufficient extrusion pressure, and at the same time can adapt to the use of round steel bodies 1 of different thicknesses to a certain extent, that is, the tapered portion 202 can cooperate with the inner tapered hole 205 to stably clamp the round steel body 1, and the flared end of the inner tapered hole 205 can first correspond to the narrow end of the tapered portion 202, thereby facilitating 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 threaded portion 206 and the external threaded portion 203. An elastic layer is provided on the outer periphery of the tapered portion 202, which 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 of the round steel body 1 with the docking member 2 and the locking member 3.

[0034] The locking member 3 includes a threaded barrel 307, which is threadedly connected to the docking portion 208 to connect the two docking members 2 together. Subsequently, the round steel body 1 connected to the two docking members 2 can be stably connected together in a fire-proof manner.

[0035] like Figure 2 As shown, during specific use, first, the outer sleeves 204 included in the two locking members 3 are respectively sleeved onto the two sections of the round steel body 1, and then the two sections of the round steel body 1 are respectively passed through the two inner sleeves 207 connected by the threaded cylinder 307, and then the two outer sleeves 204 can be rotated by a wrench to screw the internal threaded parts 206 included in the two outer sleeves 204 into engagement with the internal threaded parts 206 included in the two inner sleeves 207. After the internal threaded parts 206 and the external threaded parts 203 are tightened, the tapered parts 202 included in the two outer sleeves 204 will squeeze the tapered parts 202 included in the two inner sleeves 207, and squeeze the round steel body 1 with the cooperation of the deformation gaps 201 opened on the two tapered parts 202, so as to maintain the stable connection between the two round steel bodies 1 and the docking member 2, that is, to complete the process of stably connecting the two round steel bodies 1 without open flames.

[0036] <Example 2>

[0037] Different from Example 1, the docking piece 2 includes a flange fixed on the docking portion 208. The two flanges are fixed together by multiple bolts, and then the two inner sleeves 207 are fixed together. Subsequently, the two outer sleeves 204 can be used to dock the two sections of round steel bodies 1 together in a fire-proof manner.

[0038] <Example 3>

[0039] like Figure 5 、 Figure 6 and Figure 7As shown, unlike the embodiment 1, the locking member 3 comprises a strain block 304 for synchronizing thermal expansion and contraction of the round steel body 1. Preferably, the material of the strain block 304 is the same as that of the round steel body 1, i.e. the thermal expansion and contraction coefficients of the round steel body 1 and the strain block 304 are the same. A communication cylinder 306 is arranged to vertically penetrate the strain block 304. The communication cylinder 306 is made of the same material as the round steel body 1, which can enable the two sections of the round steel body 1 to be electrically connected, so as to maintain the electrical conductivity of the two sections of the round steel body 1. The opposite side of the strain block 304 penetrated by the communication cylinder 306 is respectively provided with a first strain column 302 and a second strain column 308. The end of each of the first strain column 302 and the second strain column 308 is provided with a connecting arm 301. The connecting arm 301 is connected to the fixing nail 305 arranged on the butt joint 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 control the distance between the two inner sleeves 207, so as to control the distance between the two connected sections of the round steel body 1. That is, when the two sections of the round steel body 1 expand in a hot environment, the two sections of the round steel body 1 are pulled to maintain the tightness of the two sections of the round steel body 1. When the two sections of the round steel body 1 contract in a cold environment, the two sections of the round steel body 1 are relaxed, so as to reduce the probability of the round steel body 1 breaking due to the cold contraction being greater than the deformation limit of the material of the round steel body 1.

[0040] Specifically, each fixing nail 305 is connected to two connecting arms 301. Each of the two connecting arms 301 is connected to a first strain column 302 or a second strain column 308 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 each of the two first strain columns 302 and the two second strain columns 308 is arranged in parallel. Thus, the fixing nail 305, the corresponding two connecting arms 301, and the corresponding two first strain columns 302 or second strain columns 308 form a triangular shape. The first strain column 302 and the second strain column 308 are fixedly connected to the strain block 304 by the reinforcing strip 303. When the strain block 304 expands and pushes the two groups of strain columns away, the triangular connecting arms 301, the fixing nail 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, i.e. 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 columns 308 close to each other, the cooperation of the connecting arm 301 and the fixing nail 305 makes the two inner sleeves 207 away from the strain block 304, i.e. 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. Thus, the breaking of the two sections of the round steel body 1 due to thermal expansion and contraction is reduced, and the probability of the outer sleeve 204 and the locking member 3 loosening due to stress change is also reduced.

[0041] The connecting tube 306 can slide with the two corresponding docking parts 208 to adapt to the strain block 304 to adjust the distance between the two docking parts 2, while maintaining the protection and electrification effect of the round steel body 1. The two external threaded parts 203 have opposite spiral directions, which makes it convenient for the staff to use two wrenches to match the hexagonal shape of the two inner sleeves 207 to tighten the two external threaded parts 203 to the two internal threaded parts 206.

[0042] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various variations 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 by: It comprises two butt joints (2) and a locking member (3) capable of connecting the two butt joints (2) together; The docking member (2) comprises an inner sleeve (207) and an outer sleeve (204), wherein 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), wherein the large diameter end of the tapered portion (202) is connected to the external threaded portion (203), and 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) that cooperates with the external threaded portion (203) of the inner sleeve (207) and an inner tapered hole (205) that cooperates 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); The locking member (3) includes a strain block (304) for thermal expansion and contraction with the round steel body (1), the strain block (304) is provided with a connecting tube (306) that vertically penetrates the strain block, and the strain block (304) is provided with a first strain column (302) and a second strain column (308) on opposite sides 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 the ends of the first strain column (302) and the second strain column (308) are both provided with a connecting arm (301), 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 pin (305) on the docking portion (208) of the corresponding docking member (2).

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. The power transmission and distribution ground grid non-fire construction connector according to 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. The power transmission and distribution ground grid non-fire construction connector according to claim 1, 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 over 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).

5. The power transmission and distribution ground grid non-fire construction connector according to claim 1, characterized in that: Both ends of the connecting tube (306) slide in the two docking portions (208) respectively.

6. A power transmission and distribution ground grid non-fire construction connector as claimed in claim 1 or 4, 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).

7. The power transmission and distribution ground grid non-fire construction connector according to 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).

8. The power transmission and distribution ground grid non-fire construction connector according to 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).

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

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