Device for testing tensile and flexure-resistant performance of insulated cable

Abstract

The invention relates to the technical field of flexure performance testing, in particular to a tensile and flexure-resistant performance testing device for an insulated cable. Comprising a base; the controller is mounted on the side surface of the base; the movable seat is connected to the base in a sliding manner; the rotating disc is rotationally connected to the moving seat; the air pump is mounted on the side surface of the movable seat; the fixed plates are symmetrically connected to the side surface of the rotating disc; and the fixed cylinders are symmetrically connected to the fixed plate, the fixed cylinders penetrate through the side face of the rotating disc, and through holes are formed in the fixed cylinders. Through the cooperation of the air pump, the fixed cylinder and the roller, an air diaphragm can be formed between the cable body and the roller, so that the cable can realize non-contact sliding with the roller during a deflection test, specifically, the air pump conveys compressed air to the fixed cylinder through the shunt pipe, and the compressed air is sprayed out through the through hole and the air outlet pipe, so that a dynamic air cushion can be formed; unexpected tensile load and surface abrasion caused by traditional roller friction can be avoided, and it is ensured that the test result only reflects the real bending fatigue performance of the cable.

Description

Technical Field

[0001] This invention relates to the technical field of flexural performance testing, and more particularly to a device for testing the tensile and flexural strength of insulated cables. Background Technology

[0002] In the field of wire and cable quality testing, the tensile strength and flexural strength of insulated cables are important indicators for measuring their long-term reliability under complex working conditions. Currently, widely used cable flexural testing machines typically employ a dual-roller structure. By passing the cable under test around two rollers arranged at a 45-degree angle, and applying a fixed weight at one end to provide constant tension, the rollers are driven to reciprocate along the cable axis to achieve periodic bending tests on the cable. This method aims to simulate the fatigue conditions of cables caused by movement, vibration, or frequent bending in actual use, thereby evaluating their structural durability and electrical continuity.

[0003] However, existing technologies reveal significant technical shortcomings in practical applications: during testing, the reciprocating movement of the rollers maintains constant contact with the cable surface, generating continuous relative sliding friction. This sliding friction not only creates significant frictional force in the contact area on the cable surface but also causes the cable to bear additional, unexpected tensile loads. This frictional force adds shear and drag effects when the cable bends, easily causing localized wear, scratches, or even cracks in the sheath material. In severe cases, it can lead to micro-deformation or breakage of the internal conductor due to abnormal stress concentration. This non-testable mechanical interference caused by friction deviates from the original purpose of simply evaluating bending fatigue performance, resulting in test results mixed with abnormal damage factors, failing to truly reflect the cable's durability performance under ideal bending conditions. Therefore, existing devices have significant deficiencies in terms of test accuracy, repeatability, and simulation of the cable's actual service conditions, seriously affecting the scientific validity and reliability of the test results. Summary of the Invention

[0004] In view of this, the present invention provides a testing device for the tensile and flexural properties of insulated cables, which can overcome the shortcomings of existing cable flexural testing machines, where cables are subjected to additional unexpected tensile loads during use, resulting in inaccurate test results.

[0005] The technical implementation scheme of the present invention is as follows: a testing device for the tensile and flexural strength of insulated cables, comprising: a base; a controller mounted on the side of the base; a movable seat slidably connected to the base; a rotating disk rotatably connected to the movable seat; an air pump mounted on the side of the movable seat; a fixed plate symmetrically connected to the side of the rotating disk; a fixed cylinder symmetrically connected to the fixed plate, and the fixed cylinder penetrates the side of the rotating disk, and has a through hole; rollers symmetrically rotatably connected to the side of the rotating disk, and the rollers are sleeved on the outside of the fixed cylinder; a shunt pipe connected to the air outlet of the air pump and kept in communication, and the end of the shunt pipe connected to the fixed cylinder and kept in communication; an air outlet pipe circumferentially spaced connected to the rollers; a first lead screw motor mounted inside the base, and the lead screw of the first lead screw motor threadedly connected to the movable seat; a fixing component disposed on the base for fixing the end of the cable body; and a rotating component disposed on the movable seat for driving the rotating disk to rotate.

[0006] Furthermore, the fixing components include: a sliding seat, symmetrically slidably connected to the base; a second lead screw motor, symmetrically mounted on the base, with the lead screw of the second lead screw motor threadedly connected to the sliding seat; a mounting bracket, slidably connected to the sliding seat; an auxiliary wheel, rotatably connected to the mounting bracket; a guide wheel, symmetrically rotatably connected to the mounting bracket; a wire seat, connected to the top of the mounting bracket; and locking bolts, threadedly connected at intervals to the top of the wire seat.

[0007] Furthermore, the rotating assembly includes: a drive motor mounted on the side of the moving base; a full gear connected to the output shaft of the drive motor; and a gear block circumferentially spaced on the rotating disk, with the gear block meshing with the full gear.

[0008] Furthermore, it also includes a pre-tensioning assembly, which comprises: a fixed frame connected to the top of the mounting frame; a lifting plate slidably connected to the inside of the fixed frame; a pressure sensor mounted on the lifting plate; a connecting plate connected to the bottom of the pressure sensor; a sliding frame slidably connected to the connecting plate; a pressure roller rotatably connected to the sliding frame; a connecting spring with its two ends connected to the sliding frame and the connecting plate respectively; a lifting mechanism mounted on the mounting frame for driving the lifting plate to move up and down; and a locking mechanism mounted on the mounting frame for locking the cable body.

[0009] Furthermore, the lifting mechanism includes: a third lead screw motor, mounted on the mounting bracket; and a screw sleeve, connected to the bottom of the lifting plate, with the lead screw of the third lead screw motor threadedly connected to the screw sleeve.

[0010] Furthermore, the locking mechanism includes: a first clamping frame connected to the top of the mounting bracket; a first electric push rod mounted on the mounting bracket; a sliding frame slidably connected to the mounting bracket, and the telescopic rod of the first electric push rod is connected to the sliding frame; and a second clamping frame connected to the sliding frame, and the second clamping frame is located directly above the first clamping frame.

[0011] Furthermore, it also includes: a buffer spring, with its two ends connected to the sliding seat and the mounting bracket respectively; a damping rod, with its two ends connected to the sliding seat and the mounting bracket respectively; a guide rod, symmetrically slidably connected to the mounting bracket; a ratchet rack, connected to the bottom of the guide rod; a guide frame, connected to the inside of the sliding seat; a sliding rod, slidably connected to the guide frame at even intervals; a wedge block, connected to the top of the sliding rod, and the wedge block engages with the ratchet rack; a return spring, wrapped around the outside of the sliding rod, with its two ends connected to the wedge block and the guide frame respectively; and a moving mechanism, mounted on the mounting bracket, used to drive the ratchet rack to move.

[0012] Furthermore, the moving mechanism includes: a U-shaped rod symmetrically connected to the top of the ratchet rack; a second electric push rod mounted on the bottom of the mounting frame; and a crossbar connected to the telescopic rod of the second electric push rod, with the crossbar sliding within the U-shaped rod.

[0013] The present invention has the following advantages: 1. The present invention, through the cooperation of air pump, fixed cylinder and roller, can form an air diaphragm between the cable body and the roller, so that the cable can slide without contact with the roller during the flex test. Specifically, the air pump delivers compressed air to the fixed cylinder through the diverter pipe, and sprays it out through the through hole and the air outlet pipe, which can form a dynamic air cushion, which can avoid the unexpected tensile load and surface wear caused by the friction of traditional rollers, and ensure that the test results only reflect the true bending fatigue performance of the cable.

[0014] 2. This invention can quickly switch the test mode of the cable body by using the rotating component. Specifically, after the rotating disk drives the roller to rotate 180 degrees, the cable body can be switched from flexural test to tensile test (or vice versa) without reassembly. At the same time, the fixing component can realize the automatic tensioning and fixing of the cable, which significantly reduces manual operation steps and improves test efficiency.

[0015] 3. This invention uses a third lead screw motor to drive the pressure roller to press down the cable. A pressure sensor monitors the tension in real time and feeds it back to the controller, ensuring that the initial tension of the cable body is consistent for each test. Through the action of the locking mechanism, the cable can be automatically clamped under the preset tension, ensuring standardized test conditions. In addition, the buffer reset assembly composed of buffer springs, damping rods and ratchet racks can absorb inertial impact when the cable breaks. The second electric push rod and crossbar are linked to achieve smooth reset of the mounting bracket, avoiding damage to the lead screw motor caused by traditional rigid connections and greatly extending the service life of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the installation of the air pump, fixing plate, fixing cylinder, roller and diverter pipe of the present invention.

[0019] Figure 4 This is a schematic diagram of the separation structure of the fixed cylinder and the roller in this invention.

[0020] Figure 5 This is a schematic diagram of the installation of the fixing component of the present invention.

[0021] Figure 6 This is a schematic diagram of the installation of the rotating component of the present invention.

[0022] Figure 7 This is a schematic diagram of the installation of the pre-tightening component of the present invention.

[0023] Figure 8 This is a schematic diagram showing the installation of the lifting plate, pressure sensor, connecting plate, sliding frame, and pressure roller of the present invention.

[0024] Figure 9 This is a schematic diagram of the structure of the first clamping frame, the first electric push rod, the sliding frame, and the second clamping frame of the present invention.

[0025] Figure 10 This is a schematic diagram showing the installation of the buffer spring, damping rod, guide rod, ratchet rack, and guide frame of the present invention.

[0026] Figure 11 This is a schematic diagram showing the installation of the slide bar, wedge block, and return spring of the present invention.

[0027] Figure 12 This is a schematic diagram showing the installation of the U-shaped rod, the second electric push rod, and the crossbar of the present invention.

[0028] The meanings of the reference numerals in the diagram are as follows: 001-Cable body, 1-Base, 2-Controller, 3-Moving seat, 4-Rotating disk, 5-Air pump, 6-Fixing plate, 7-Fixing cylinder, 701-Through hole, 8-Roller, 9-Diverter pipe, 10-Air outlet pipe, 11-First lead screw motor, 12-Sliding seat, 13-Second lead screw motor, 14-Mounting bracket, 15-Auxiliary wheel, 16-Guide wheel, 17-Wire seat, 18-Locking bolt, 19-Drive motor, 20-Full gear, 21-Gear block, 22-Fixing frame 23-Lifting plate, 24-Pressure sensor, 25-Connecting plate, 26-Sliding frame, 27-Pressure roller, 28-Connecting spring, 29-Third lead screw motor, 30-Screw sleeve, 31-First clamping frame, 32-First electric push rod, 33-Sliding frame, 34-Second clamping frame, 35-Buffer spring, 36-Damping rod, 37-Guide rod, 38-Ratchet, 39-Guide frame, 40-Slide rod, 41-Wedge block, 42-Reset spring, 43-U-shaped rod, 44-Second electric push rod, 45-Crossbar. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example: A device for testing the tensile and flexural strength of insulated cables, such as... Figures 1-6 As shown, the assembly includes a base 1, a controller 2, a movable seat 3, a rotating disk 4, an air pump 5, a fixed plate 6, a fixed cylinder 7, rollers 8, a diverter pipe 9, an air outlet pipe 10, a first lead screw motor 11, a fixing assembly, and a rotating assembly. The controller 2 is mounted on the front left side of the base 1. The movable seat 3 is slidably connected to the middle of the base 1. The rotating disk 4 is rotatably connected to the upper part of the movable seat 3. The air pump 5 is mounted on the rear middle of the movable seat 3. Two fixed plates 6 are symmetrically connected to the upper rear side of the movable seat 3. A fixed cylinder 7 is connected to each of the two fixed plates 6, and both fixed cylinders 7 penetrate the front side of the rotating disk 4. Each fixed cylinder 7 has a through hole 701. Two rollers 8 are symmetrically rotatably connected to the upper front side of the rotating disk 4. The rollers 8 are connected to the fixed cylinders 7... One-to-one correspondence, and the roller 8 is sleeved on the outside of the fixed cylinder 7, that is, the inner side of the roller 8 is in contact and sealed with the outer side of the fixed cylinder 7. The air outlet of the air pump 5 is connected to the diverter pipe 9, which is a three-way flexible hose. The other two ends of the diverter pipe 9 are respectively connected to the rear side of the two fixed cylinders 7 and keep them connected. Multiple air outlet pipes 10 are circumferentially spaced on both rollers 8. The air outlet pipes 10 can keep connected to the inside of the fixed cylinder 7 through the through hole 701. The first lead screw motor 11 is installed in the middle of the inside of the base 1, and the lead screw of the first lead screw motor 11 is threadedly connected to the lower part of the moving seat 3. The base 1 is provided with a fixing component for fixing the end of the cable body 001, and the moving seat 3 is provided with a rotating component for driving the rotating disk 4 to rotate.

[0031] like Figure 5As shown, the fixing assembly includes a sliding seat 12, a second lead screw motor 13, a mounting bracket 14, an auxiliary wheel 15, a guide wheel 16, a wire seat 17, and locking bolts 18. Sliding seats 12 are slidably connected to both the left and right sides of the base 1. A second lead screw motor 13 is mounted on both the left and right sides of the base 1, and the lead screw of the second lead screw motor 13 is threadedly connected to the lower part of the sliding seat 12. Mounting brackets 14 are slidably connected to both sliding seats 12, and the lower part of the side of the two mounting brackets 14 that is close to each other contacts the inner wall of the sliding seat 12, so that when the two sliding seats 12 move to the side that is far apart from each other, they can push the two mounting brackets 14 to move synchronously to the side that is far apart from each other. An auxiliary wheel 15 is rotatably connected to the upper side of the two mounting brackets 14 that is close to each other. Two guide wheels 16 are rotatably connected to the upper side of the two mounting brackets 14 that is close to each other. A wire seat 17 is connected to the top of the two mounting brackets 14 that is far apart from each other. Three locking bolts 18 are threadedly connected to the top of the two wire seats 17 at intervals.

[0032] like Figure 6 As shown, the rotating assembly includes a drive motor 19, a full gear 20, and a toothed block 21. The drive motor 19 is mounted on the upper rear side of the movable seat 3. The full gear 20 is connected to the output shaft of the drive motor 19. The toothed blocks 21 are circumferentially spaced on the rotating disk 4, and the toothed blocks 21 mesh with the full gear 20.

[0033] When a flexural test is required on the cable body 001, such as Figure 1As shown, first, the cable body 001 is passed through the left-side conductor seat 17, then between the two left-side guide wheels 16, and then the cable body 001 is passed around the two rollers 8. Since the rollers 8 can rotate freely on the rotating disk 4, it is convenient for the cable body 001 to pass around the two rollers 8, then between the two right-side guide wheels 16, and finally through the right-side conductor seat 17. Then, the locking bolts 18 are tightened to fix the left and right ends of the cable body 001. Then, the controller 2 controls the air pump 5 to start working. The air pump 5 can deliver compressed air to the fixed cylinder 7 through the diverter pipe 9. The compressed air in the fixed cylinder 7 can be ejected outward through the through hole 701 and the air outlet pipe 10 aligned with the through hole 701, so that the cable body 001 is separated from the rollers 8 and separated by a certain distance. An air gap is formed between the roller 8 and the cable body 001. The controller 2 then controls the first lead screw motor 11 to start working, driving the moving seat 3 to move left and right a specified number of times. The moving seat 3, through the air gap outside the roller 8, pushes the cable body 001 to bend back and forth. During the test, an air gap is always maintained between the cable body 001 and the roller 8, preventing contact and ensuring the accuracy of the test results. After the test, the controller 2 stops the first lead screw motor 11 and the air pump 5, and then loosens the locking bolt 18, allowing the cable body 001 to be removed for surface inspection. When a tensile test is required on the cable body 001, such as... Figure 2As shown, the cable body 001 is directly passed horizontally through the conductor seats 17 and guide wheels 16 on both sides. The cable body 001 passes directly between the two rollers 8 without contacting them. The two ends of the cable body 001 are then fixed. The controller 2 then controls the second lead screw motor 13 to start working. The second lead screw motor 13 drives the sliding seats 12 on both sides to move away from each other. The sliding seats 12 drive the mounting brackets 14 and conductor seats 17 on both sides to move away from each other, thereby moving the left and right ends of the cable body 001 away from each other to perform a tensile test on the cable body 001. After the test is completed, the controller 2 stops the second lead screw motor 13 and then loosens the locking bolts 18. The cable body 001 can then be removed for surface inspection. When tensile and flexural tests are required on the same cable body 001, after one test is completed, the locking bolt 18 is loosened, and the drive motor 19 is started by the controller 2. The drive motor 19 drives the full gear 20 to rotate, which in turn drives the gear block 21 to rotate. The gear block 21 drives the rotating disk 4 to rotate 180 degrees, thus switching the positions of the two rollers 8. This allows the state of the cable body 001 and rollers 8 to be switched without removing and reinstalling the cable body 001. Then, the cable body 001 is tightened again, and the locking bolt 18 is tightened to fix the cable body 001, allowing another test to be performed on the cable body 001.

[0034] Because cable body 001 requires manual installation, its test tension depends on the degree of manual tightening. Therefore, it is difficult to ensure that each cable body 001 experiences consistent tension during testing. Thus, a pre-tensioning assembly was designed. Figures 7-9As shown, the pre-tightening assembly includes a fixed frame 22, a lifting plate 23, a pressure sensor 24, a connecting plate 25, a sliding frame 26, a pressure roller 27, a connecting spring 28, a lifting mechanism, and a locking mechanism. The tops of both mounting frames 14 are connected to the fixed frame 22. The bottom of the fixed frame 22 is open. The lifting plate 23 is slidably connected to the upper side of the interior of the fixed frame 22. A pressure sensor 24 is installed in the middle of the lifting plate 23. The bottom of the pressure sensor 24 is connected to the connecting plate 25. A sliding frame 26 is slidably connected to the connecting plate 25. A pressure roller 27 is rotatably connected to the lower part of the sliding frame 26. A connecting spring 28 connects the sliding frame 26 and the connecting plate 25. The mounting frame 14 is equipped with a lifting mechanism for driving the lifting plate 23 to rise and fall. The mounting frame 14 is also equipped with a locking mechanism for locking the cable body 001. The lifting mechanism includes a third lead screw motor 29 and a screw sleeve 30. The third lead screw motor 29 is installed on the upper part of both mounting brackets 14. The screw sleeve 30 is connected to the bottom front side of both lifting plates 23, and the lead screw of the third lead screw motor 29 is threadedly connected to the screw sleeve 30. The locking mechanism includes a first clamping frame 31, a first electric push rod 32, a sliding frame 33 and a second clamping frame 34. The first clamping frame 31 is connected to the side of the top of both mounting brackets 14 that is close to each other. The first electric push rod 32 is installed on the side of the upper part of both mounting brackets 14 that is close to each other. The sliding frame 33 is slidably connected to the side of the upper part of both mounting brackets 14 that is close to each other. The telescopic rod of the first electric push rod 32 is connected to the sliding frame 33. The second clamping frame 34 is connected to both sliding frames 33, and the second clamping frame 34 is located directly above the first clamping frame 31.

[0035] After the cable body 001 is installed, it will pass directly under the pressure roller 27. Then, the controller 2 can control the third lead screw motor 29 to start working. The third lead screw motor 29 drives the screw sleeve 30 to move the lifting plate 23 downward, thereby causing the pressure sensor 24, connecting plate 25, sliding frame 26 and pressure roller 27 to move downward synchronously. When the pressure roller 27 contacts the cable body 001, it will apply vertical pressure to the cable body 001, causing the cable body 001 to undergo elastic deformation and generate axial tension. At this time, the reaction force of the pressure roller 27 will push the sliding frame. 26 slides relative to the connecting plate 25 and compresses the connecting spring 28 to form a flexible pressure structure. The pressure sensor 24 detects the pressure value in real time and feeds it back to the controller 2. The pressure value is converted into the actual tension of the cable body 001 by the algorithm. When the tension reaches the preset threshold, the controller 2 will control the third lead screw motor 29 to stop working and control the first electric push rod 32 to drive the sliding frame 33 and the second clamping frame 34 to move downward, so that the second clamping frame 34 and the first clamping frame 31 work together to clamp the cable body 001, complete the tension locking, and ensure that the cable can be tested under constant tension conditions.

[0036] If the mounting bracket 14 and the sliding seat 12 are designed as a fixed connection, the inertial force on the mounting bracket 14 will act on the threaded connection between the second lead screw motor 13 and the sliding seat 12 at the moment the cable body 001 breaks during testing, causing damage to the threaded connection between the second lead screw motor 13 and the sliding seat 12. Therefore, the mounting bracket 14 and the sliding seat 12 are designed as a sliding connection. In this way, when the cable body 001 breaks, the mounting bracket 14 will slide relative to the sliding seat 12 due to inertia, which can prevent damage to the threaded connection between the second lead screw motor 13 and the sliding seat 12. However, the mounting bracket 14 cannot automatically reset, so a buffer reset component is designed. Figures 10-12 As shown, the buffer reset assembly includes a buffer spring 35, a damping rod 36, a guide rod 37, a ratchet rack 38, a guide frame 39, a slide rod 40, a wedge block 41, a reset spring 42, and a moving mechanism. A buffer spring 35 is connected between the mounting bracket 14 and the sliding seat 12. A damping rod 36 is installed between the mounting bracket 14 and the sliding seat 12. Guide rods 37 are symmetrically slidably connected to the bottom sides of the two mounting brackets 14 that are close to each other. A ratchet rack 38 is connected between the bottoms of the guide rods 37. Guide frames 39 are connected inside the two sliding seats 12. Multiple slide rods 40 are slidably connected evenly spaced inside the guide frames 39. The top of each slide rod 40... Each of the two ratchet bars 38 is connected to a wedge block 41, with the inclined surface of the wedge block 41 facing the direction of the ratchet 38. A return spring 42 is wound around the outside of each slide bar 40, and the two ends of the return spring 42 are respectively connected to the wedge block 41 and the guide frame 39. The mounting frame 14 is provided with a moving mechanism for driving the ratchet 38 to move. The moving mechanism includes a U-shaped rod 43, a second electric push rod 44 and a crossbar 45. The tops of the two ratchet bars 38 are symmetrically connected to the front and rear of the two ratchet bars 38. The bottoms of the two mounting frames 14 are each equipped with a second electric push rod 44. A crossbar 45 is connected to the telescopic rod of the second electric push rod 44, and the crossbar 45 slides within the U-shaped rod 43.

[0037] When the cable body 001 breaks, the mounting brackets 14 on both sides will move away from each other due to inertia. That is, the mounting brackets 14 will slide relative to the sliding seat 12, the buffer spring 35 will be compressed, and the damping rod 36 will be compressed and shortened. The damping rod 36 enables the mounting bracket 14 to move slowly and uniformly. The buffer spring 35 and the damping rod 36 work together to buffer the movement. The mounting bracket 14 will also drive the guide rods 37 and ratchet 38 on both sides to move away from each other. When the ratchet 38 contacts the wedge block 41, the ratchet 38 will squeeze the wedge block 41 and the slide rod 40 downwards, and the return spring 42 will be compressed. When the ratchet 38 passes the wedge block 41, the return spring 42 will return to its original state, driving the wedge block 41 and the slide rod 40 to move upwards and reset, so that the wedge block 41 locks the ratchet 38 to provide unidirectional limit for the mounting bracket 14. When the mounting bracket 14 stops moving... Then, the controller 2 can control the second electric push rod 44 to drive the horizontal bars 45 on both sides to move closer to each other. The horizontal bars 45 can squeeze the U-shaped bar 43 to move upward. The U-shaped bar 43 drives the ratchet 38 to move upward, so that the ratchet 38 disengages from the wedge block 41, thereby releasing the limit on the mounting bracket 14. At this time, the buffer spring 35 will return to its original state, driving the mounting brackets 14 on both sides to move closer to each other to reset. The damping rod 36 will slowly extend to reset, so that the mounting brackets 14 on both sides can move and reset at a uniform speed, preventing the mounting brackets 14 from instantly resetting and colliding with the sliding seat 12. When the mounting brackets 14 are completely reset, the controller 2 can control the second electric push rod 44 to drive the horizontal bars 45 on both sides to move further away from each other. The horizontal bars 45 can squeeze the U-shaped bar 43 to move downward to reset. The U-shaped bar 43 drives the ratchet 38 to move downward to reset.

[0038] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for testing the tensile and flexural strength of insulated cables, comprising: a base (1); characterized in that, It also includes: a controller (2), installed on the side of the base (1); a movable seat (3), slidably connected to the base (1); a rotating disk (4), rotatably connected to the movable seat (3); an air pump (5), installed on the side of the movable seat (3); a fixed plate (6), symmetrically connected to the side of the rotating disk (4); a fixed cylinder (7), symmetrically connected to the fixed plate (6), and the fixed cylinder (7) penetrates the side of the rotating disk (4), and the fixed cylinder (7) has a through hole (701); and rollers (8), symmetrically rotatably connected to the side of the rotating disk (4), and the rollers (8) are sleeved on the fixed plate. The outer side of the cylinder (7); the diverter pipe (9), connected to the air outlet of the air pump (5) and kept in communication, and the end of the diverter pipe (9) is connected to the fixed cylinder (7) and kept in communication; the air outlet pipe (10), circumferentially spaced and connected to the roller (8); the first lead screw motor (11), installed in the base (1), and the lead screw of the first lead screw motor (11) is threadedly connected to the moving seat (3); the fixing component, set on the base (1), is used to fix the end of the cable body (001); the rotating component, set on the moving seat (3), is used to drive the rotating disk (4) to rotate.

2. The device for testing the tensile and flexural strength of insulated cables according to claim 1, characterized in that, The fixing components include: a sliding seat (12), which is symmetrically slidably connected to the base (1); The second lead screw motor (13) is symmetrically mounted on the base (1), and the lead screw of the second lead screw motor (13) is threadedly connected to the sliding seat (12); the mounting bracket (14) is slidably connected to the sliding seat (12); the auxiliary wheel (15) is rotatably connected to the mounting bracket (14); the guide wheel (16) is symmetrically rotatably connected to the mounting bracket (14); the wire seat (17) is connected to the top of the mounting bracket (14); and the locking bolt (18) is threadedly connected to the top of the wire seat (17) at intervals.

3. The device for testing the tensile and flexural strength of insulated cables according to claim 1, characterized in that, The rotating assembly includes: a drive motor (19) mounted on the side of the movable seat (3); a full gear (20) connected to the output shaft of the drive motor (19); and a tooth block (21) circumferentially spaced on the rotating disk (4), and the tooth block (21) meshes with the full gear (20).

4. The device for testing the tensile and flexural strength of insulated cables according to claim 2, characterized in that, It also includes a pre-tightening assembly, which includes: a fixed frame (22) connected to the top of the mounting frame (14); a lifting plate (23) slidably connected to the inside of the fixed frame (22); a pressure sensor (24) mounted on the lifting plate (23); a connecting plate (25) connected to the bottom of the pressure sensor (24); a sliding frame (26) slidably connected to the connecting plate (25); a pressure roller (27) rotatably connected to the sliding frame (26); a connecting spring (28) with its two ends connected to the sliding frame (26) and the connecting plate (25) respectively; a lifting mechanism set on the mounting frame (14) for driving the lifting plate (23) to lift; and a locking mechanism set on the mounting frame (14) for locking the cable body (001).

5. A testing device for the tensile and flexural strength of insulated cables according to claim 4, characterized in that, The lifting mechanism includes: a third lead screw motor (29), which is mounted on the mounting bracket (14); and a screw sleeve (30), which is connected to the bottom of the lifting plate (23), and the lead screw of the third lead screw motor (29) is threadedly connected to the screw sleeve (30).

6. The device for testing the tensile and flexural strength of insulated cables according to claim 4, characterized in that, The locking mechanism includes: a first clamping frame (31) connected to the top of the mounting bracket (14); a first electric push rod (32) mounted on the mounting bracket (14); a sliding frame (33) slidably connected to the mounting bracket (14), and the telescopic rod of the first electric push rod (32) is connected to the sliding frame (33); and a second clamping frame (34) connected to the sliding frame (33), and the second clamping frame (34) is located directly above the first clamping frame (31).

7. The device for testing the tensile and flexural strength of insulated cables according to claim 2, characterized in that, It also includes: a buffer spring (35), with its two ends connected to the sliding seat (12) and the mounting bracket (14) respectively; a damping rod (36), with its two ends connected to the sliding seat (12) and the mounting bracket (14) respectively; a guide rod (37), which is symmetrically slidably connected to the mounting bracket (14); a ratchet (38), which is connected to the bottom of the guide rod (37); a guide frame (39), which is connected to the inside of the sliding seat (12); a slide rod (40), which is slidably connected to the guide frame (39) at even intervals; a wedge block (41), which is connected to the top of the slide rod (40), and the wedge block (41) is in contact with the ratchet (38); a return spring (42), which is wrapped around the outside of the slide rod (40), and the two ends of the return spring (42) are connected to the wedge block (41) and the guide frame (39) respectively; and a moving mechanism, which is set on the mounting bracket (14) and is used to drive the ratchet (38) to move.

8. A testing device for the tensile and flexural strength of insulated cables according to claim 7, characterized in that, The moving mechanism includes: a U-shaped rod (43) symmetrically connected to the top of the ratchet rack (38); a second electric push rod (44) installed at the bottom of the mounting bracket (14); and a crossbar (45) connected to the telescopic rod of the second electric push rod (44), and the crossbar (45) slides within the U-shaped rod (43).

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