Tensile strength detection device

Abstract

The utility model discloses a tensile strength detection device which comprises a case, an electric push rod and a concentric-square-shaped base are fixedly connected in the case, the bottom of the output end of the electric push rod and the top of the concentric-square-shaped base are fixedly connected with assembly plates of hollow structures, and the interiors of the two assembly plates are rotationally connected with screw rods. The outer walls of the two screws are each sleeved with three T-shaped blocks in a threaded mode. Through the arrangement of the assembly plate, the screw rod, the hand wheel, the T-shaped block, the L-shaped frame, the tension sensor, the L-shaped connecting frame, the rectangular connecting plate, the locking bolt, the sawtooth extrusion plate and the semicircular plate, the positions of the two ends of the three high-voltage wire bodies can be fixed, and the two ends of the high-voltage wire bodies are prevented from slipping through the effects of secondary limiting and friction force; and the detection ends of the three tension sensors record the tensile strength of the high-voltage wire body in sequence during detection, so that the tensile strength detection efficiency of the high-voltage wire body is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of wire tensile strength testing equipment, and in particular to a tensile strength testing device. Background Technology

[0002] During laying and installation, high-voltage power lines need to withstand various tensile and compressive forces. High tensile strength ensures that the wires are not easily broken or damaged during installation, thus guaranteeing construction safety and the normal operation of the cable system. Furthermore, high-voltage power lines are constantly exposed to natural environmental corrosion and human factors; high-tensile-strength wires can effectively resist impacts, reduce damage, and extend their service life. Therefore, tensile strength testing is required during the production of high-voltage power lines.

[0003] For example, the patent document with prior art authorization announcement number CN221199246U discloses a high-efficiency wire and cable tensile strength testing mechanism. It is constructed by attaching one end of the wire and cable to an I-shaped fixed shaft and the other end of the wire and cable to another I-shaped fixed shaft. Then, the middle part of the wire and cable is placed in an arc-shaped recess. The limiting nut is then loosened, and the strip plug plate is pulled to the right. Finally, the limiting nut is tightened. Then, the fixed handle is held, and the drive component and length adjustment component are rotated clockwise. At this time, the moving extrusion component will be squeezed backward, thereby squeezing the wire and cable to test the tensile strength of the wire and cable.

[0004] When the above-mentioned wires are tested for tensile strength, the wires and cables are squeezed by moving the extrusion assembly. During this process, the two ends of the wires and cables are respectively tied to two I-shaped fixed shafts. When a large pressure is applied, it is impossible to ensure the fixed state of the wires and cables, and slippage is easy to occur. At the same time, multiple tests are required during sampling inspection, which reduces efficiency when multiple wires and cables are tested sequentially. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a tensile strength testing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A tensile strength testing device includes a housing. An electric push rod and a U-shaped base are fixedly connected inside the housing. Hollow assembly plates are fixedly connected to the bottom of the output end of the electric push rod and the top of the U-shaped base. Screws are rotatably connected inside the two assembly plates. Three T-blocks are threaded onto the outer walls of the two screws. One end of each of the six T-blocks is fixedly connected to an L-shaped frame. Tensile sensors are fixedly connected to the outer walls of the six L-shaped frames. The detection ends of the six tensile sensors are fixedly connected to L-shaped connecting frames. A limiting mechanism is provided on the outer wall of the assembly plate.

[0008] Preferably, the limiting mechanism includes six rectangular connecting plates, and the outer walls of the six L-shaped connecting frames are respectively fixedly connected to the outer walls of the six rectangular connecting plates. The outer walls of the rectangular connecting plates are provided with threaded holes, and the inner walls of the threaded holes are threaded with locking bolts. One end of the locking bolt is rotatably connected to a serrated pressing plate. The outer walls of the L-shaped frames are fixedly connected with semi-circular plates. By setting the limiting mechanism, the high-voltage wire body is fixed between the upper and lower assembly plates.

[0009] Preferably, the outer walls of both assembly plates are provided with through holes, and the inner walls of the two through holes are rotatably connected to the outer walls of the two screws respectively. A handwheel is fixedly connected to one end of the two screws, and the screws are rotated by the handwheel, thereby moving the three T-blocks.

[0010] Preferably, the outer walls of both assembly plates are provided with strip grooves, and the inner walls of the two strip grooves are slidably connected to the outer walls of the six T-blocks, thereby assisting the T-blocks in linear movement.

[0011] Preferably, a high-voltage wire body is placed between the outer wall of the semi-circular plate and the serrated extrusion plate, and a protective door is hinged to the outer wall of the chassis. The protective door prevents the high-voltage wire from popping out when it is pulled apart, thus protecting the testing personnel.

[0012] Preferably, the L-shaped frame and the assembly plate are slidably connected.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] This solution uses an assembly plate, screw, handwheel, T-block, L-frame, tension sensor, L-shaped connecting frame, rectangular connecting plate, locking bolt, serrated extrusion plate, and semi-circular plate to fix the positions of the two ends of the three high-voltage wire bodies. Through secondary limiting and friction, it prevents the two ends of the high-voltage wire bodies from slipping. During testing, the detection ends of the three tension sensors sequentially record the tensile strength of the high-voltage wire bodies, improving the efficiency of high-voltage wire body tensile strength testing. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional structural diagram of a tensile strength testing device proposed in this utility model;

[0017] Figure 2 This is a partial cross-sectional structural diagram of a tensile strength testing device proposed in this utility model;

[0018] Figure 3 This utility model proposes a tensile strength testing device. Figure 1 A magnified structural diagram of part A in the diagram;

[0019] Figure 4 This is a three-dimensional structural diagram of a tensile strength testing device proposed in this utility model.

[0020] In the diagram: 1. Chassis; 2. Electric push rod; 3. U-shaped base; 4. Assembly plate; 5. Screw; 6. Handwheel; 7. T-block; 8. L-shaped frame; 9. Tension sensor; 10. L-shaped connecting frame; 11. Rectangular connecting plate; 12. Locking bolt; 13. Serrated extrusion plate; 14. Semicircular plate; 15. High-voltage wire body; 16. Protective door. Detailed Implementation

[0021] The following will be combined with the accompanying 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 embodiments described are only part of the embodiments of the present 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 making creative efforts are within the scope of protection of the present invention.

[0022] Depend on Figures 1-4 As shown, a tensile strength testing device is disclosed, comprising a housing 1. An electric push rod 2 and a U-shaped base 3 are fixedly connected inside the housing 1. Hollow assembly plates 4 are fixedly connected to the bottom of the output end of the electric push rod 2 and the top of the U-shaped base 3. The two assembly plates 4 are arranged vertically inside the housing 1. Screws 5 are rotatably connected inside the two assembly plates 4. An existing bearing is fixedly fitted at one end of the screw 5. The outer ring of the bearing is fixedly connected to the inner wall of the assembly plate 4. The screw pitch angle of the screw 5 is greater than the friction angle, giving the screw 5 self-locking properties. Through holes are opened on the outer walls of the two assembly plates 4. The inner walls of the two through holes are rotatably connected to the outer walls of the two screws 5 respectively. A handwheel 6 is fixedly connected to one end of the two screws 5, and the handwheel 6 drives the screws 5 to rotate.

[0023] The outer walls of the two screws 5 are threaded with three T-blocks 7, and the outer walls of the two assembly plates 4 are provided with strip grooves. The inner walls of the two strip grooves are slidably connected to the outer walls of the six T-blocks 7 respectively.

[0024] Each of the six T-shaped blocks 7 has an L-shaped frame 8 fixedly connected to one end. The L-shaped frame 8 is slidably connected to the assembly plate 4. The six L-shaped frames 8 are arranged in pairs, one above the other. Each of the six L-shaped frames 8 has a tension sensor 9 (EVT-14E-1T) fixedly connected to its outer wall. The tension sensor 9 (EVT-14E-1T) mainly works by the elastic deformation of the elastic body under the action of external force. This deformation causes the resistance strain gauge attached to the elastic body to deform as well, thereby changing its resistance value. This change in resistance value is processed by the measuring circuit and converted into an electrical signal (usually voltage or current), thus realizing the process of converting external force into an electrical signal. It can be connected to an existing display screen. The circuit connection between the two adopts the conventional connection method in the existing technology. Each of the six tension sensors 9 has an L-shaped connecting frame 10 fixedly connected to its detection end.

[0025] The outer wall of the assembly plate 4 is provided with a limiting mechanism, which includes six rectangular connecting plates 11. The outer walls of the six L-shaped connecting brackets 10 are respectively fixedly connected to the outer walls of the six rectangular connecting plates 11. The outer wall of the rectangular connecting plate 11 is provided with threaded holes. The inner wall of the threaded holes is threaded with locking bolts 12. One end of the locking bolt 12 is rotatably connected to a serrated pressing plate 13. One end of the locking bolt 12 is fixedly fitted with an existing bearing. The outer ring of the bearing is fixedly connected to the outer wall of the serrated pressing plate 13.

[0026] A semicircular plate 14 is fixedly connected to the outer wall of the L-shaped frame 8. A high-voltage wire body 15 is placed between the outer wall of the semicircular plate 14 and the serrated extrusion plate 13. A protective door 16 is hinged to the left outer wall of the chassis 1.

[0027] Working principle: In use, open the protective door 16, and then place one end of each of the three high-voltage wire bodies 15 between the multiple serrated pressing plates 13 and the semi-circular plate 14 at the bottom of the upper mounting plate 4. During this placement process, rotate the three locking bolts 12 in sequence to move the three serrated pressing plates 13 to the left. The three serrated pressing plates 13 initially limit one end of the high-voltage wire body 15. Then, rotate the handwheel 6 on the upper mounting plate 4 to rotate the screw 5. The rotation of the screw 5 moves the three T-blocks 7 to the left, which in turn moves the three L-shaped brackets 8 to the left, thus causing the three serrated pressing plates 13 to continue moving to the left. The position of one end of the three high-voltage wire bodies 15 is fixed. Similarly, the position of the other end of the three high-voltage wire bodies 15 can be fixed by using the lower assembly plate 4. The six semi-circular plates 14 and the six serrated extrusion plates 13 are paired up to fix the positions of both ends of the three high-voltage wire bodies 15 respectively. During the test, the electric push rod 2 drives the upper assembly plate 4 to move upward. The upper assembly plate 4 moves upward and causes the high-voltage wire bodies 15 to be stretched. The tensile force generated in the middle is transmitted to the tension sensor 9 through the rectangular connecting plate 11 and the L-shaped connecting frame 10. The detection ends of the three tension sensors 9 record the tensile strength of the high-voltage wire bodies 15 in sequence.

[0028] All standard parts used in this utility model can be purchased from the market. Irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. Furthermore, the structure and principle of the components known to those skilled in the art can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0029] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tensile strength testing device, comprising a housing (1), characterized in that, The internal casing (1) is fixedly connected to an electric push rod (2) and a U-shaped base (3). The bottom of the output end of the electric push rod (2) and the top of the U-shaped base (3) are both fixedly connected to a hollow assembly plate (4). The two assembly plates (4) are rotatably connected to screws (5). The outer walls of the two screws (5) are threaded with three T-shaped blocks (7). One end of each of the six T-shaped blocks (7) is fixedly connected to an L-shaped frame (8). The outer walls of the six L-shaped frames (8) are fixedly connected to tension sensors (9). The detection ends of the six tension sensors (9) are fixedly connected to L-shaped connecting frames (10). The outer walls of the assembly plate (4) are provided with a limiting mechanism.

2. The tensile strength testing device according to claim 1, characterized in that, The limiting mechanism includes six rectangular connecting plates (11), and the outer walls of six L-shaped connecting frames (10) are fixedly connected to the outer walls of the six rectangular connecting plates (11). The outer walls of the rectangular connecting plates (11) are provided with threaded holes, and the inner walls of the threaded holes are threaded with locking bolts (12). One end of the locking bolts (12) is rotatably connected to a serrated pressing plate (13), and the outer walls of the L-shaped frames (8) are fixedly connected with a semi-circular plate (14).

3. The tensile strength testing device according to claim 1, characterized in that, Both assembly plates (4) have through holes on their outer walls. The inner walls of the two through holes are rotatably connected to the outer walls of the two screws (5). A handwheel (6) is fixedly connected to one end of each screw (5).

4. The tensile strength testing device according to claim 1, characterized in that, The outer walls of the two assembly plates (4) are provided with strip grooves, and the inner walls of the two strip grooves are slidably connected to the outer walls of the six T-blocks (7).

5. The tensile strength testing device according to claim 2, characterized in that, A high-voltage wire body (15) is placed between the outer wall of the semicircular plate (14) and the sawtooth extrusion plate (13), and a protective door (16) is hinged to the outer wall of the chassis (1).

6. The tensile strength testing device according to claim 1, characterized in that, The L-shaped frame (8) is slidably connected to the assembly plate (4).

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