A T-shaped composite material insulation cross arm for power system

Abstract

The present invention relates to a T-shaped composite insulating crossarm for an electric power system, which comprises a crossarm core rod, a crossarm sleeve, an intermediate connecting hardware and an end connecting hardware, wherein the crossarm core rod has a T-shaped cross section, and the intermediate connecting hardware and the end connecting hardware are sleeved on both ends of the crossarm core rod; the crossarm sleeve covers the entire crossarm core rod, and the crossarm sleeves respectively cover the intermediate connecting hardware and the connecting sections of the end connecting hardware and the crossarm core rod. The T-shaped composite insulating crossarm for an electric power system of the present invention has the advantages of high utilization rate of composite materials, reasonable structural design, easy production, and can realize fast assembly operations.

Description

Technical Field

[0001] The invention relates to a T-shaped composite material insulating cross arm for an electric power system, belonging to the technical field of power transmission and transformation equipment. Background Art

[0002] At present, with the improvement of composite material manufacturing process and material performance, composite materials have been rapidly promoted in power transmission and transformation projects of various voltage levels in my country. Structural parts made of composite materials are generally different hollow structures, which are installed and connected to the main body of the pole through different hardware. Traditional composite material insulation crossarms are generally hollow circular or rectangular structures. However, during the specific use of the crossarms, the force is generally pressure. Therefore, when analyzing the force of the traditional hollow circular or rectangular crossarms, it is found that the original crossarm structure design is unreasonable. In addition, the original crossarm structure cannot be installed quickly during installation. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a T-shaped composite material insulating cross arm for an electric power system which has high utilization rate of composite materials, reasonable structural design, is easy to produce and can realize quick installation operation.

[0004] The object of the present invention is achieved in that:

[0005] A T-shaped composite material insulated cross arm for an electric power system, comprising a cross arm core rod, a cross arm bushing, an intermediate connection fitting and an end connection fitting.

[0006] The cross-section of the cross-arm core rod is T-shaped.

[0007] The intermediate connection fitting comprises an intermediate connection fitting body and an intermediate connection fitting sleeve portion provided at at least one end of the intermediate connection fitting body, wherein the intermediate connection fitting sleeve portion is sleeved on one end of the cross arm core rod.

[0008] The end connection fitting comprises an end connection frame, a fixing groove and a hanging hole, wherein the end connection frame is used to connect with the cross arm core rod, the fixing groove and the hanging hole are arranged at the outer end of the end connection frame, and the end connection frame is sleeved on the other end of the cross arm core rod;

[0009] The cross arm sleeve covers the entire cross arm core rod, and the cross arm sleeves respectively cover the middle connecting hardware and the connecting sections of the end connecting hardware and the cross arm core rod.

[0010] As a preferred embodiment, the end connecting frame includes an end connecting frame sleeve groove, which is a T-shaped structure and has a shape that matches that of the cross-arm core rod. The end connecting frame sleeve groove is surrounded by an end connecting frame frame of the T-shaped structure, and the end connecting frame frame has an end connecting hardware sleeve flange formed by an outward flanging at the end portion of the side connected to the cross-arm core rod.

[0011] As a preferred embodiment, the fixing groove has an upward U-shaped opening, and the length direction of the U-shaped opening is perpendicular to the length direction of the cross arm core rod.

[0012] As a preferred embodiment, the fixing groove is located above the hanging hole.

[0013] As a preference, the intermediate connecting fitting body is a transversely extending vertical plate structure.

[0014] As a preferred embodiment, the intermediate connecting hardware socket has a T-shaped slot, the T-shaped slot is surrounded by a T-shaped frame, the T-shaped frame includes a horizontal section and a vertical section, the outer dimensions of the vertical section of the T-shaped frame are consistent with the dimensions of the lower half of the intermediate connecting hardware body, the outer dimensions of the horizontal section of the T-shaped frame are extended to both sides by the upper half of the intermediate connecting hardware body, and the T-shaped frame has an intermediate connecting hardware socket flange formed by an outward flange at the end.

[0015] As a preference, the fixing groove and the hanging hole are located at the outer end of the end connection frame, the fixing groove and the hanging hole are arranged away from the cross arm core rod, and the total height of the fixing groove and the hanging hole is equal to the height of the end connection frame.

[0016] As a preferred embodiment, the fixing groove and the hanging hole are located at the outer end of the end connecting frame, and a support platform is also arranged between the fixing groove and the hanging hole. The height of the fixing groove and the support platform is higher than the top surface height of the end connecting frame, and the top surface height of the hanging hole is consistent with the top surface height of the end connecting frame.

[0017] As a preferred embodiment, the middle portion of the support platform is recessed inward to form a circle of winding grooves.

[0018] As a preferred embodiment, two opposite ends of the bottom of the support platform are each provided with a notch inwardly to form a winding slot.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The cross arm core rod adopts T-shaped structure. Since the end of the cross arm receives downward pressure during use, the force analysis of the cross arm can be simplified to a cantilever beam structure. When analyzing the force of the cantilever beam structure, the force analysis and material selection of the T-shaped structure are the most optimized;

[0021] 2. When assembling the entire cross arm, you only need to connect the end connection hardware and the middle connection hardware to the two ends of the cross arm core rod, and then coat it to complete the production, which is convenient for production;

[0022] 3. Since the overall weight of the cross arm is light, it is easy to install. In addition, it is also convenient to install the pulley on the end connecting fittings, so quick installation can be achieved.

[0023] In summary, the T-shaped composite material insulating cross arm for an electric power system of the present invention has the advantages of high utilization rate of composite materials, reasonable structural design, easy production, and quick installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a schematic diagram of the first form of installation structure of a T-shaped composite material insulation cross arm for a power system.

[0025] Figure 2 The figure is a schematic diagram of the second installation structure of a T-shaped composite material insulation cross arm for a power system.

[0026] Figure 3 It is a schematic diagram of the structure of the cross arm core rod.

[0027] Figure 4 for Figure 1 or Figure 2 Schematic diagram of the structure of the middle connecting hardware on the upper layer.

[0028] Figure 5 for Figure 4 Schematic diagram from another perspective.

[0029] Figure 6 for Figure 1 or Figure 2 Schematic diagram of the structure of the intermediate connecting hardware in the lower layer.

[0030] Figure 7 This is a schematic diagram of the structure of the cross arm bushing.

[0031] Figure 8 This is a schematic diagram of the first form of end connection fittings.

[0032] Fig. 9 This is a schematic diagram of the second form of end connection fittings.

[0033] in:

[0034] Cross arm mandrel 1

[0035] Cross arm sleeve 2, shed skirt 201

[0036] Intermediate connecting fitting 3, intermediate connecting fitting body 301, mounting hole 301.1, slot 302.1, intermediate connecting fitting sleeve part 302, frame 302.2, intermediate connecting fitting sleeve part flange 302.3

[0037] End connection fitting 4, end connection frame 401, end connection frame sleeve groove 401.1, end connection frame frame 401.2, end connection fitting sleeve flange 401.3, fixing groove 402, hanging hole 403, support platform 404, winding groove 404.1, winding bayonet 404.2

[0038] Electric pole 5. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 9 The present invention relates to a T-shaped composite material insulation cross arm for power system, which comprises a cross arm core rod 1, a cross arm bushing 2, an intermediate connection hardware 3 and an end connection hardware 4. The cross arm core rod 1 and the cross arm bushing 2 are both made of insulating materials, wherein the cross section of the cross arm core rod 1 is a T-shaped structure, the cross arm core rod 1 is a composite material injection pultrusion type solid core, the intermediate connection hardware 3 and the end connection hardware 4 are made of aluminum alloy material, the cross arm bushing 2 has a through inner hole, the cross section of the inner hole is a T-shaped structure, and the cross section shape of the inner hole matches the cross section shape of the cross arm core rod 1; the top surface of the above-mentioned T-shaped structure has a convex arc surface, and each outer frame line of the T-shaped structure is a circular arc transition. The outer surface of the cross arm bushing 2 is provided with a plurality of sheds 201 along its length direction, and the outer edge contour line of the sheds 201 is a T-shaped structure similar to and slightly larger than the cross section of the cross arm core rod 1.

[0041] The intermediate connection fitting 3 includes an intermediate connection fitting body 301 and an intermediate connection fitting sleeve portion 302 arranged at at least one end of the intermediate connection fitting body 301. The intermediate connection fitting body 301 is provided with at least two mounting holes 301.1 penetrating the intermediate connection fitting body 301. The intermediate connection fitting body 301 is a vertical plate structure extending laterally. The intermediate connection fitting sleeve portion 302 has a T-shaped slot 302.1. The T-shaped slot 302.1 is formed by a T-shaped The frame 302.2 of the T-shaped structure is surrounded by the frame 302.2 of the structure, and the frame 302.2 of the T-shaped structure includes a horizontal section and a vertical section. The outer dimensions of the vertical section of the frame 302.2 of the T-shaped structure are consistent with the dimensions of the lower half of the middle connecting hardware body 301, and the outer dimensions of the horizontal section of the frame 302.2 of the T-shaped structure are formed by extending the upper half of the middle connecting hardware body 301 to both sides. The frame 302.2 of the T-shaped structure has an outward flange at the end, and the flange at this location forms a flange 302.3 of the middle connecting hardware sleeve.

[0042] The end connection fitting 4 comprises an end connection frame 401, a fixing groove 402 and a hanging hole 403. The end connection frame 401 is used to connect with the cross arm mandrel 1. The fixing groove 402 and the hanging hole 403 are arranged at the outer end of the end connection frame 401. The fixing groove 402 has an upward U-shaped opening. The length direction of the U-shaped opening is perpendicular to the length direction of the cross arm mandrel 1. The fixing groove 402 is located above the hanging hole 403. The end connection frame 401 comprises an end connection frame sleeve groove 401.1. The end connection frame sleeve groove 401.1 is a T-shaped structure, and its shape matches that of the cross arm mandrel 1. The end connection frame sleeve groove 401.1 is surrounded by a T-shaped end connection frame frame 401.2. The end connection frame frame 401.2 has an outward flange at the end of the side connected to the cross arm mandrel 1. The flange at this location forms a flange 401.3 of the end connection fitting sleeve portion.

[0043] The above-mentioned end connection fittings 4 have two types:

[0044] First form:

[0045] The fixing groove 402 and the hanging hole 403 are located at the outer end of the end connection frame 401 , and are arranged away from the cross arm core rod 1 , and the total height of the fixing groove 402 and the hanging hole 403 is approximately equal to the height of the end connection frame 401 .

[0046] See also Figure 1The pole 5 is connected to the middle connecting fitting 3 through a clamp or other connecting parts. The upper insulating cross arm includes a cross arm core rod 1, a cross arm sleeve 2, an middle connecting fitting 3 and an end connecting fitting 4. The lower insulating cross arm includes two cross arm core rods 1, two cross arm sleeves 2, an middle connecting fitting 3 and two end connecting fittings 4.

[0047] Second form:

[0048] The fixing groove 402 and the hanging hole 403 are located at the outer end of the end connection frame 401, and a support platform 404 is further arranged between the fixing groove 402 and the hanging hole 403. The top and bottom of the support platform 404 are roughly circular, and the middle part of the support platform 404 is recessed inward to form a circle of winding groove 404.1, and the opposite ends of the bottom of the support platform 404 are each provided with a notch inward to form a winding clip 404.2. The top surface height of the hanging hole 403 is consistent with the top surface height of the end connection frame 401, and the height of the fixing groove 402 and the support platform 404 is higher than the top surface height of the end connection frame 401, so that when in use, after the wire is located on the support platform 404, there is a height difference with the cross arm, which increases the insulation performance.

[0049] See also Figure 2 The pole 5 is connected to the middle connecting fitting 3 through a clamp or other connecting parts. The upper insulating cross arm includes a cross arm core rod 1, a cross arm sleeve 2, an middle connecting fitting 3 and an end connecting fitting 4. The lower insulating cross arm includes two cross arm core rods 1, two cross arm sleeves 2, an middle connecting fitting 3 and two end connecting fittings 4.

[0050] A method for producing a T-shaped composite insulating cross arm for a power system:

[0051] First, the cross arm core rod 1, the middle connection fitting 3 and the end connection fitting 4 are produced respectively;

[0052] Secondly, the middle connecting fittings 3 and the end connecting fittings 4 are installed on both ends of the cross arm core rod 1;

[0053] Finally, the connecting sections of the middle connecting fitting 3, the end connecting fitting 4 and the cross-arm core rod 1 are coated, and the cross-arm sleeve 2 is formed on the outside including insulating material. The two ends of the cross-arm sleeve 2 extend to the flange 302.3 of the middle connecting fitting sleeve and the flange 401.3 of the end connecting fitting sleeve, respectively, so corresponding flange structures are also formed at the openings at both ends of the cross-arm sleeve 2.

[0054] The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A T-shaped composite material insulation cross arm for a power system, characterized in that It comprises a cross arm core rod (1), a cross arm sleeve (2), an intermediate connection fitting (3) and an end connection fitting (4). The cross-section of the cross-arm core rod (1) is a T-shaped structure. The intermediate connection fitting (3) comprises an intermediate connection fitting body (301) and an intermediate connection fitting sleeve portion (302) arranged at at least one end of the intermediate connection fitting body (301), wherein the intermediate connection fitting sleeve portion (302) is sleeved on one end of a cross arm core rod (1). The end connection fitting (4) comprises an end connection frame (401), a fixing groove (402) and a hanging hole (403); the end connection frame (401) is used to connect with the cross arm core rod (1); the fixing groove (402) and the hanging hole (403) are arranged at the outer end of the end connection frame (401); and the end connection frame (401) is sleeved on the other end of the cross arm core rod (1); The cross-arm sleeve (2) covers the entire cross-arm core rod (1), and the cross-arm sleeve (2) covers the connecting section of the middle connecting fitting (3) and the end connecting fitting (4) and the cross-arm core rod (1) respectively; The end connection frame (401) comprises an end connection frame sleeve groove (401.1), the end connection frame sleeve groove (401.1) is a T-shaped structure, and its shape matches that of the cross arm core rod (1), the end connection frame sleeve groove (401.1) is surrounded by an end connection frame frame (401.2) of the T-shaped structure, and the end connection frame frame (401.2) has an end connection hardware sleeve flange (401.3) formed by an outwardly flanging at the end portion of the side connected to the cross arm core rod (1); The intermediate connecting hardware sleeve portion (302) has a T-shaped slot (302.1), the T-shaped slot (302.1) is surrounded by a T-shaped frame (302.2), the T-shaped frame (302.2) comprises a horizontal section and a vertical section, the outer dimensions of the vertical section of the T-shaped frame (302.2) are consistent with the dimensions of the lower half of the intermediate connecting hardware body (301), the outer dimensions of the horizontal section of the T-shaped frame (302.2) are formed by extending the upper half of the intermediate connecting hardware body (301) to both sides, and the T-shaped frame (302.2) has an intermediate connecting hardware sleeve portion flange (302.3) formed by outwardly flanging at the end.

2. The T-shaped composite material insulating cross arm for a power system according to claim 1, characterized in that The fixing groove (402) has an upward U-shaped opening, and the length direction of the U-shaped opening is perpendicular to the length direction of the cross arm core rod (1).

3. The T-shaped composite material insulating cross arm for a power system according to claim 1, characterized in that The fixing groove (402) is located above the hanging hole (403).

4. The T-shaped composite material insulating cross arm for a power system according to claim 1, characterized in that The middle connection fitting body (301) is a transversely extending vertical plate structure.

5. The T-shaped composite material insulating cross arm for a power system according to claim 1, characterized in that The fixing groove (402) and the hanging hole (403) are located at the outer end of the end connection frame (401), the fixing groove (402) and the hanging hole (403) are arranged away from the cross arm core rod (1), and the total height of the fixing groove (402) and the hanging hole (403) is equal to the height of the end connection frame (401).

6. The T-shaped composite material insulating cross arm for a power system according to claim 1, characterized in that The fixing groove (402) and the hanging hole (403) are located at the outer end of the end connection frame (401), and a support platform (404) is provided between the fixing groove (402) and the hanging hole (403). The heights of the fixing groove (402) and the support platform (404) are higher than the top surface height of the end connection frame (401), and the top surface height of the hanging hole (403) is consistent with the top surface height of the end connection frame (401).

7. The T-shaped composite material insulating cross arm for a power system according to claim 6, characterized in that The middle part of the support platform (404) is inwardly recessed to form a circle of winding grooves (404.1).

8. The T-shaped composite material insulating cross arm for a power system according to claim 6, characterized in that Two opposite ends of the bottom of the support platform (404) are each provided with a notch facing inwards to form a wire winding slot (404.2).

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