A double-split transmission line suspension clamp and test method

Abstract

The present invention discloses a suspension clamp for a double-split transmission line and a test method, mainly including a connecting plate, etc. After the two ends of tension core rod A and tension core rod B are flattened and drilled, they are connected to the steel strand by a U-shaped hanging ring. The steel strand is connected to the hanging ring through a seamless steel pipe. The steel strand passes through a roller, and the roller is installed at both ends of the connecting plate through a parallel hanging plate. Product A and product B are respectively connected to tension core rod A and tension core rod B, and a double-suspension clamp string type is connected between product A and product B. In the test of the present invention, the contact between the test core rod and the suspension clamp is close in the middle, and extends at an angle of 12.5° at both ends. Suspension clamps of different specifications can meet the requirements of different suspension clamps by replacing the test core rod; meet the mechanical test requirements of the product; have a simple structure, are convenient to manufacture and use quickly.

Description

Technical Field

[0001] The present invention relates to the field of transmission lines, and particularly to a double-split transmission line suspension clamp and a test method therefor. Background Art

[0002] The suspension clamp is an important part of the overhead transmission line, mainly used to hang conductors and optical cables on insulator strings or poles. It generally includes components such as a hull, a rotating shaft, and a pressure bar (including fastening screws), and mainly bears the vertical load from the conductors and optical cables under normal operating conditions. If the suspension clamp is unqualified in quality and cannot withstand the vertical load within the specified range and breaks, it will cause the conductor to break, resulting in circuit accidents and even possible casualties, with serious consequences and far-reaching impacts. Therefore, before the suspension clamp is put into use, a destructive load test is carried out on it to determine whether its mechanical strength meets the requirements. The traditional suspension clamp load test tooling only conducts load tests on the clamp body itself, and does not effectively measure the two-side hanging plates and the whole, especially for the double-split transmission line suspension clamp. Therefore, a new technical solution is needed to solve this problem. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies existing in the prior art and provide a double-split transmission line suspension clamp and a test method therefor.

[0004] The double-split transmission line suspension clamp of the present invention mainly includes a connecting plate, parallel hanging plates, rollers, hanging rings, tension core rod A, double suspension clamp string type, tension core rod B, product A, product B, steel strands, seamless steel pipes. The two ends of the tension core rod A and the tension core rod B are flattened and drilled, and then connected by U-shaped hanging rings and steel strands. The steel strands are connected to the hanging rings through seamless steel pipes. The steel strands pass through the rollers, and the rollers are installed at both ends of the connecting plate through the parallel hanging plates. Product A and product B are respectively connected to the tension core rod A and the tension core rod B, and the double suspension clamp string type is connected between product A and product B.

[0005] The connecting plate, the parallel hanging plates, and the rollers are connected by bolts, nuts, and support pipes.

[0006] The tension core rod A and the tension core rod B are manufactured from material 45# and are subjected to quenching and tempering heat treatment.

[0007] The rollers are manufactured from material 45#.

[0008] The connecting plate is an L-32-130 / 600 connecting plate, and the connecting plate is fixed to a horizontal tensile testing machine.

[0009] The parallel hanging plates are P-16100 parallel hanging plates.

[0010] Both the coupling plate and the parallel suspension plate are manufactured from Q355 material, with chamfering and deburring on the periphery and each orifice, and hot-dip galvanized.

[0011] The suspension ring is a UK-25110 suspension ring, manufactured from 35# material, normalized heat-treated, and hot-dip galvanized.

[0012] The steel strand is a 1X19-4.0-1570 steel strand, about 1.8 meters long, and the left and right steel strands are required to be of the same length.

[0013] The tension core rod A, the tension core rod B and the double suspension clamp string are in close contact in the middle, and extend at an angle of 12.5° at both ends.

[0014] This double-split transmission line suspension test method mainly includes the following content:

[0015] 1) The positive tension F upward of the coupling plate, the downward force F1 of the parallel suspension plate under stress, and the test is carried out according to the force of 1 to 2 times the required conductor.

[0016] 2) It is required that the force values of N1+N3 and N2+N4 are uniform, so that the forces on product A and product B are the same, and the mechanical loads acting on the coupling plate and the parallel suspension plate are jointly decomposed.

[0017] 3) The parallel suspension plate is connected to the roller group. When product A and product B are stressed, N3 and N4 are subjected to the same force, N1 and N2 are subjected to the same force, and the acting forces of N1 and N3, N2 and N4 are also the same. The entire test scheme is achieved. N1, N2, N3, and N4 jointly decompose the mechanical load at both ends of the tooling, achieving force balance.

[0018] The beneficial effects of the present invention are as follows: The test core rod of the present invention is in close contact in the middle with the suspension clamp and extends at an angle of 12.5° at both ends. Different specifications of suspension clamps can meet the requirements of different suspension clamps by replacing the test core rod; it meets the mechanical test requirements of the product; it has a simple structure, is convenient to manufacture and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the structure of the single-link I-type suspension string of the 70kN disc suspension insulator for the 2XZ11-4000-07P-2A vertical double-split conductor in the national standard.

[0020] Figure 2 It is the side view of the structure of the single-link I-type suspension string of the 70kN disc suspension insulator for the 2XZ11-4000-07P-2A vertical double-split conductor in the national standard.

[0021] Figure 3 It is the structural schematic diagram of the present invention.

[0022] Figure 4 ForFigure 3 Schematic diagram in the A direction in

[0023] Explanation of reference numerals: connecting plate 1, parallel suspension plate 2, roller 3, suspension ring 4, tension core rod A5, double suspension clamp string type 6, tension core rod B7, product A8, product B9, bolt 11, support pipe 12, nut 13, steel strand 14, seamless steel pipe 15. Specific implementation mode

[0024] The present invention will be described in detail below with reference to the accompanying drawings:

[0025] Embodiment: As shown in the accompanying drawings, this double-split transmission line suspension clamp mainly includes a connecting plate 1, a parallel suspension plate 2, a roller 3, a suspension ring 4, a tension core rod A5, a double suspension clamp string type 6, a tension core rod B7, a product A8, a product B9, a steel strand 14, and a seamless steel pipe 15. The two ends of the tension core rod A5 and the tension core rod B7 are flattened and drilled and then connected by a U-shaped suspension ring 4 and a steel strand 14. The steel strand 14 is connected to the suspension ring 4 through the seamless steel pipe 15, so that the steel strand 14 pulls a vertical load test on it during the test. The steel strand 14 passes through the roller 3 to ensure balanced stress at both ends. The roller 3 is installed at both ends of the connecting plate 1 through the parallel suspension plate 2, and the connecting plate 1, the parallel suspension plate 2, and the roller 3 are connected by bolts 11, nuts 13, and support pipes 12. The product A8 and the product B9 are respectively connected to the tension core rod A5 and the tension core rod B7, and the double suspension clamp string type 6 is connected between the product A8 and the product B9.

[0026] The tension core rod A5 and the tension core rod B7 are processed and manufactured from material 45# and are subjected to quenching and tempering heat treatment. The roller 3 is processed and manufactured from material 45#. The connecting plate 1 is an L-32-130 / 600 connecting plate, and the connecting plate 1 can be fixed to a horizontal tensile testing machine. The parallel suspension plate 2 is a P-16100 parallel suspension plate. The connecting plate 1 and the parallel suspension plate 2 are both processed and manufactured from material Q355, and the peripheries and orifices are chamfered, deburred, and hot-dip galvanized. The suspension ring 4 is a UK-25110 suspension ring, which is processed and manufactured from material 35#, normalized and heat-treated, and hot-dip galvanized. The steel strand 14 is a 1X19-4.0-1570 steel strand, about 1.8 meters long, and the left and right two steel strands 14 are required to be of the same length. The tension core rod A5, the tension core rod B7, and the double suspension clamp string type 6 are in close contact in the middle, and extend at an angle of 12.5° at both ends. Different specifications of suspension clamps can meet the requirements of different suspension clamps by replacing the test core rods.

[0027] The connection of the suspension ring 4 uses an M27X100X40K bolt of grade 6.8 and an M27 nut of grade 6; the roller 3 is fixed on the double parallel suspension plate 2 using an M24X125X35K bolt of grade 6.8 and is sleeved with a φ34X4X8 support pipe and an M24 nut of grade 6; the parallel suspension plate 2 is fixed on the connecting plate 1 using an M24X125X35K bolt of grade 6.8 and an M24 nut of grade 6.

[0028] This double-split transmission line suspension test method mainly includes the following contents:

[0029] 1) The positive pulling force F upward on the link plate 1 and the downward force F1 on the parallel hanger 2 under stress. The test is carried out with a force 1 to 2 times that of the required conductor.

[0030] 2) It is required that the force values of N1 + N3 and N2 + N4 are uniform, so that the forces on product A8 and product B9 are the same, and the mechanical loads acting on the link plate 1 and the parallel hanger 2 are jointly decomposed.

[0031] 3) The parallel hanger 2 is connected to a pulley block composed of rollers. When product A8 and product B9 are stressed, N3 and N4 are subject to the same force, N1 and N2 are subject to the same force, and the acting forces of N1 and N3, N2 and N4 are also the same. The entire test scheme is achieved. N1, N2, N3, and N4 jointly decompose the mechanical loads at both ends of the tooling, achieving force balance.

[0032] It can be understood that for those skilled in the art, equivalent substitutions or changes to the technical solutions and inventive concepts of the present invention should fall within the protection scope of the appended claims of the present invention.

Claims

1. A suspension clamp for a double-split transmission line, characterized in that: It includes a connecting plate (1), a parallel suspension plate (2), a roller (3), a suspension ring (4), a tension core rod A (5), a double suspension clamp string type (6), a tension core rod B (7), product A (8), product B (9), a steel strand (14), and a seamless steel pipe (15). The two ends of the tension core rod A (5) and the tension core rod B (7) are flattened and drilled, and then connected to the steel strand (14) by a U-shaped suspension ring (4). The steel strand (14) is connected to the suspension ring (4) through the seamless steel pipe (15). The steel strand (14) passes through the roller (3). The roller (3) is installed at both ends of the connecting plate (1) through the parallel suspension plate (2). The product A (8) and the product B (9) are respectively connected to the tension core rod A (5) and the tension core rod B (7). The double suspension clamp string type (6) is connected between the product A (8) and the product B (9).

2. The suspension clamp for double-split transmission line according to claim 1, wherein: The connecting plate (1), the parallel suspension plate (2), and the roller (3) are connected by bolts (11), nuts (13), and a support pipe (12).

3. The suspension clamp for double-split transmission line according to claim 1, characterized in that: The left and right steel strands (14) are required to be of the same length and consistent.

4. The suspension clamp for double-split transmission line according to claim 1, wherein: The tension core rod A (5) and the tension core rod B (7) are in close contact in the middle when contacting the double suspension clamp string type (6), and extend at an angle of 12.5° at both ends.

5. A suspension test method for a double-split transmission line, using the double-split transmission line suspension clamp as described in claim 1, characterized in that: It includes the following steps: 1) The positive tension F upward of the connecting plate (1), and the force F1 downward of the parallel suspension plate (2) under stress. The test is carried out with a force 1 to 2 times that of the required conductor. 2) It is required that the force values of N1 + N3 and N2 + N4 are uniform and consistent, so that the forces on product A (8) and product B (9) are the same, and the mechanical loads acting on the connecting plate (1) and the parallel suspension plate (2) are jointly decomposed. 3) The parallel suspension plate (2) is connected to a set of rollers (3). When product A (8) and product B (9) are stressed, N3 and N4 are subject to the same force, N1 and N2 are subject to the same force, and the acting forces of N1 and N3, N2 and N4 are also the same. The entire test plan is achieved. N1, N2, N3, and N4 jointly decompose the mechanical loads at both ends of the tooling, achieving force balance.

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