Tension testing tool for electric power straight line tightening lead screw

Abstract

The utility model belongs to the technical field of live-line tool performance detection, and particularly relates to an electric power linear stringing lead screw tension test tool which comprises wing-shaped clamps, a tension plate, a tension pad, a tension bolt and a nut, two electric power linear stringing lead screws are connected between the two wing-shaped clamps in parallel, and the stress directions of the two wing-shaped clamps coincide under tension; the wing-shaped clamp is connected with the tensile machine tool connector through the tension plate, and the wing-shaped clamp is fixedly or movably connected with the tension plate. Compared with the prior art, the single-hanging-point duplex linear stringing lead screw has the advantages that the structure of the single-hanging-point duplex linear stringing lead screw is combined, the single-hanging-point duplex linear stringing lead screw is matched with a tensile machine tool connector, rapid connection of the single-hanging-point duplex linear stringing lead screw is guaranteed, the number of auxiliary connecting pieces is reduced to the maximum extent, and manufacturing cost is reduced; the tool is suitable for 42T, 45T or 55T straight line tightening lead screws, and can realize rapid detection of large-batch single-hanging-point duplex straight line tightening lead screws.

Description

Technical Field

[0001] This utility model belongs to the field of live tool performance testing technology, and in particular relates to a test fixture for the tension of a power linear tension screw. Background Technology

[0002] In the maintenance and construction of ultra-high voltage transmission lines, it is often necessary to replace multiple insulators (i.e., insulator strings). Replacing insulators on 500 kV ultra-high voltage transmission lines is done using manually tightened and loosened load-bearing screws. Article 6.8.1.8 of the "Eighteen Major Grid Accident Prevention Measures" issued by the State Grid Corporation of China (State Grid Equipment

[2018] No. 979, revised version) stipulates that suspension insulator strings for 500 kV and below "three-span" lines should adopt an independent double-string design. For lines in mountainous areas with large elevation differences and continuous uphill and downhill sections, a single-point double-connection design can be used. Therefore, in some locations with important crossings or large spans, 500 kV ultra-high voltage transmission lines will use double straight-line insulator strings to improve the safety factor and ensure the safe operation of the line.

[0003] In a single-point double-strand insulator string structure, the double linear tensioning screws exert a large force and are easily damaged during use. Therefore, it is necessary to regularly inspect the double linear tensioning screws to avoid safety accidents.

[0004] The national standard DL / T976-2017 specifies the test standards for linear lead screws, but does not mention the corresponding tooling structure. How to achieve rapid testing is the key point of the design, and there are few reports on it at present. Utility Model Content

[0005] The purpose of this invention is to provide a testing fixture for the tensile strength of a power linear tensioning screw, overcoming the shortcomings of the existing technology. By combining the structure of the single-point double-connection linear tensioning screw with the tool connector of the tensile testing machine, it ensures the rapid connection of the single-point double-connection linear tensioning screw while minimizing the number of auxiliary connecting parts, thus enabling rapid testing of a large batch of single-point double-connection linear tensioning screws.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A power linear tension screw tension testing fixture includes wing-shaped clamps, a tension plate, a tension pad, a tension bolt, and a nut. Two power linear tension screws are connected in parallel between two wing-shaped clamps, so that the force directions of the two wing-shaped clamps coincide under tension. The wing-shaped clamps are connected to the tension testing machine tool connector through the tension plate, and the wing-shaped clamps and the tension plate are either fixedly connected or movably connected.

[0008] Furthermore, any one of the wing-shaped clamps is an integral structure with a through groove located in the center and offset to one side. The through groove is movably connected to the tension plate. A tension pad is provided above and below one end of the tension plate. The tension pad and the tension plate are connected by tension bolts and nuts.

[0009] Furthermore, any one of the wing-shaped clamps is a symmetrical split structure with a tension plate centrally located, and the tension plate is connected to the wing-shaped clamp by bolts and nuts.

[0010] Furthermore, the tension plate is provided with elongated holes for weight reduction.

[0011] Furthermore, the wing-shaped clamp is provided with a limiting pin hole to prevent the tension plate from falling out, and a limiting pin is provided in the limiting pin hole.

[0012] Furthermore, the applicable specifications for the electric linear tensioning screw are 42T, 45T, or 55T.

[0013] Furthermore, the applicable specification of the tensile testing machine is a 300kN horizontal tensile testing machine.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1) Combining the structure of the single-point double-link linear tensioning screw with the tool connector of the tensile testing machine, it ensures the quick connection of the single-point double-link linear tensioning screw while minimizing the number of auxiliary connectors and reducing manufacturing costs.

[0016] 2) The tooling is suitable for linear tensioning screws of 42T, 45T or 55T specifications, and can realize rapid testing of large batches of single-point double-link linear tensioning screws. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0018] Figure 2 This is a schematic diagram of the integrated wing-shaped clamp structure in Embodiment 1 of this utility model;

[0019] Figure 3 This is a schematic diagram of the tension plate structure in Embodiment 1 of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0021] Figure 5 This is a schematic diagram of the split-type wing-shaped clamp structure in Embodiment 2 of this utility model;

[0022] Figure 6 This is a schematic diagram of the tension plate in Embodiment 2 of this utility model.

[0023] In the diagram: 1-wing-shaped clamp one, 2-wing-shaped clamp two, 3-tension plate, 4-tension pad, 5-tension bolt, 6-electric linear tensioning screw, 7-long hole, 8-limit pin, 9-bolt, 10-tension plate two. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of this utility model. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0026] The components of the present invention described and shown in the specific embodiments herein can be arranged and designed in numerous different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but only to illustrate selected embodiments of the invention.

[0027] See Figure 1-3 This is a schematic diagram of the structure of a first embodiment of the power linear tensioning screw tension testing fixture of this utility model, including a wing-shaped clamp 1, a wing-shaped clamp 2, a tension plate 3, a tension pad 4, a tension bolt 5, and a nut. Two power linear tensioning screws 6 are connected in parallel between the two wing-shaped clamps, so that the force directions of the two wing-shaped clamps coincide under tension. The wing-shaped clamps are connected to the tension testing machine tool connector through the tension plate 3, and the wing-shaped clamps and the tension plate 3 are movably connected.

[0028] Both wing-shaped clamp 1 and wing-shaped clamp 2 are integral structures, with a through groove located slightly off-center to one side. The through groove is movably connected to the tension plate 3. A tension pad 4 is located at the top and bottom of one end of the tension plate 3. The tension pad 4 and the tension plate 3 are connected by tension bolts 5 and nuts. The tension plate 3 has elongated holes 7 for weight reduction. The wing-shaped clamp has a limiting pin hole to prevent the tension plate 3 from dislodging, and a limiting pin 8 is located in the limiting pin hole.

[0029] See Figure 4-6This is a schematic diagram of the second embodiment of the tension testing fixture for electric linear tensioning screws 6 of this utility model. It includes a first wing-shaped clamp 1, a second wing-shaped clamp 2, a tension plate 3, a second tension plate 10, a tension pad 4, a tension bolt 5, and a nut. Two electric linear tensioning screws 6 are connected in parallel between the two wing-shaped clamps, ensuring that the force directions of the two wing-shaped clamps coincide under tension. The wing-shaped clamps are connected to the tension testing machine tool connector via the tension plate 3. The first wing-shaped clamp 1 is movably connected to the corresponding tension plate 3; the second wing-shaped clamp 2 is fixedly connected to the corresponding tension plate 3.

[0030] The wing-shaped clamp 1 is a one-piece structure with a through groove located off-center to one side. The through groove is movably connected to the tension plate 3. A tension pad 4 is located above and below one end of the tension plate 3. The tension pad 4 and the tension plate 3 are connected by tension bolts 5 and nuts. The tension plate 3 has elongated holes 7 for weight reduction. The wing-shaped clamp has limiting pin holes to prevent the tension plate 3 from dislodging, and limiting pins 8 are located in the limiting pin holes.

[0031] The second wing clamp is a symmetrical split structure with the second tension plate 10 in the center. The second tension plate 10 is connected to the second wing clamp by bolts 9 and nuts.

[0032] In the above embodiments, the applicable specifications for the electric linear tensioning screw 6 are 42T, 45T, or 55T. The applicable specification for the tensile testing machine is a 300kN horizontal tensile testing machine.

[0033] In the embodiment of this utility model, first connect the two electric linear tensioning screws 6 between the wing clamp 1 and the wing clamp 2, and adjust them to be of the same length. Select the combination form of the wing clamp 1 and the wing clamp 2 with the corresponding tension plate according to the specifications of the electric linear tensioning screw 6. Connect the wing clamp 1 and the wing clamp 2 to the tool connector head of the tensioning machine respectively. Start the tensioning machine and apply the tension value corresponding to the specifications of the electric linear tensioning screw 6. Maintain for 5 minutes. If the electric linear tensioning screw 6 does not deform or break, it is qualified.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixture for testing the tension of a linear power cable tensioning screw, characterized in that, It includes wing-shaped clamps, tension plates, tension pads, tension bolts, and nuts. Two linear power tensioning screws are connected in parallel between the two wing-shaped clamps so that the force directions of the two wing-shaped clamps coincide under tension. The wing-shaped clamps are connected to the tension machine tool connector through the tension plate. The wing-shaped clamps and the tension plate are either fixedly connected or movably connected.

2. The electrical linear tension screw tension testing fixture according to claim 1, characterized in that, Each of the aforementioned wing-shaped clamps is an integral structure with a through groove located in the center and offset to one side. The through groove is movably connected to the tension plate. A tension pad is provided above and below one end of the tension plate. The tension pad and the tension plate are connected by tension bolts and nuts.

3. The electrical linear tension screw tension testing fixture according to claim 1, characterized in that, Each of the aforementioned wing-shaped clamps is a symmetrical split structure with a tension plate centrally located. The tension plate is connected to the wing-shaped clamp via bolts and nuts.

4. The electrical linear tension screw tension testing fixture according to claim 1, characterized in that, The tension plate is provided with elongated holes for weight reduction.

5. The electrical linear tension screw tension testing fixture according to claim 2, characterized in that, The wing-shaped clamp is provided with a limiting pin hole to prevent the tension plate from falling out, and a limiting pin is provided in the limiting pin hole.

6. The electrical linear tension screw tension testing fixture according to claim 1, characterized in that, The applicable specifications for the electric linear tensioning screw are 42T, 45T or 55T.

7. The electrical linear tension screw tension testing fixture according to claim 1, characterized in that, The applicable specification of the tensile testing machine is a 300kN horizontal tensile testing machine.

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