Cable tension detection device

Abstract

The invention discloses a cable tension detection device, which belongs to the field of material mechanical property testing and comprises two supporting rods. The two supporting rods are parallel to each other, and a mounting plate and a mounting rod are jointly mounted at the two adjacent ends of the two supporting rods correspondingly. A hydraulic cylinder is fixedly mounted on the mounting plate; a pressure detector is fixedly mounted at the output end of the hydraulic cylinder; a connecting rod is fixedly installed on the side wall of the supporting rod, the connecting rod is perpendicular to the supporting rod, and the connecting rod is parallel to the installation rod. A limiting sleeve with two open ends is fixedly mounted at the end part of the connecting rod; a penetrating groove is formed in the side wall of the side, away from the connecting rod, of the limiting sleeve and penetrates through the two ends of the limiting sleeve. An elastic telescopic rod is fixedly inserted into the side wall of the supporting rod; according to the scheme, through the arrangement of the cover plate, the limiting sleeve and the locking mechanism, in the detection process, if the cable is broken, the high-speed and irregular swinging range at the moment of cable breakage can be limited through the limiting sleeve and the cover plate, and the safety in the detection process is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of material mechanical property testing, more particularly to a cable tension detection device. BACKGROUND

[0002] In the field of power construction, line maintenance and material recycling, it is often necessary to detect the tension of the recycled old cable on the outdoor site to evaluate its remaining mechanical strength and whether it meets the conditions for reuse.

[0003] Unlike the laboratory environment, the outdoor site detection conditions are simple, and the types of special detection tools available for use are limited. Therefore, the operator is often forced to use a simple but high-risk method: fixing the two ends of the cable to two relatively stable anchor points (such as vehicles, trees or fixed piles), and then applying tension in opposite directions through tools such as vehicle towing, manual hoist or winch, and estimating or recording the tension value through indirect methods to judge the tensile performance of the cable.

[0004] However, this simple detection method has the following defects: Firstly, the smoothness of the tension application and the accuracy of the measurement data cannot be guaranteed, affecting the reliability of the detection results; secondly, and more seriously, there is a huge safety risk. When the cable is pulled to its strength limit, it will break instantaneously. At the moment of breaking, the elastic potential energy accumulated in the cable will be released violently, causing the unrestrained cable end to swing like a whip at high speed and irregularly. In an outdoor work space with open space and relatively unstable personnel and equipment positions, such violent swinging poses a serious threat to the personal safety of the on-site personnel, and may also cause accidental damage to surrounding construction equipment, vehicles or other facilities.

[0005] Therefore, a cable tension detection device is proposed. SUMMARY

[0006] In view of the problems in the prior art, the purpose of the present application is to provide a cable tension detection device that can improve safety and detection accuracy when detecting outdoors.

[0007] To solve the above problems, the present application adopts the following technical solutions.

[0008] A cable tension detection device includes two support rods; The two support rods are parallel to each other, and the two adjacent ends of the two support rods are respectively provided with an installation plate and an installation rod; A hydraulic cylinder is fixedly installed on the installation plate; a pressure detector is fixedly installed on the output end of the hydraulic cylinder; A connecting rod is fixedly installed on the side wall of the support rod, the connecting rod is perpendicular to the support rod, and the connecting rod is parallel to the installation rod; The end of the connecting rod is fixedly installed with a limiting sleeve with two open ends; And a through groove is formed in the side wall of the limiting sleeve away from the connecting rod, and the through groove penetrates the two ends of the limiting sleeve; A flexible telescopic rod is fixedly inserted in the side wall of the supporting rod, the flexible telescopic rod is parallel to the connecting rod, and the flexible telescopic rod and the connecting rod are symmetrically distributed on the two supporting rods; A cover plate is fixedly installed on the output end of the flexible telescopic rod and matched with the through groove; And a locking mechanism is fixedly installed on the supporting rod for fixing the cover plate and the limiting sleeve together; Further, the flexible telescopic rod comprises a mounting sleeve, a movable rod and an elastic member, the mounting sleeve is embedded in the supporting rod, the end of the mounting sleeve close to the limiting sleeve is open, the movable rod is movably inserted in the open end of the mounting sleeve, and the elastic member is fixedly installed between the inner wall of the mounting sleeve and the movable rod.

[0009] Further, the locking mechanism comprises a insertion hole formed in the end of the cover plate, a sleeve is fixedly installed on the side wall of the mounting plate and matched with the insertion hole, an insertion rod is movably inserted in the end of the sleeve close to the insertion hole, a spring is jointly installed between the insertion rod and the inner wall of the sleeve, and a driving mechanism is arranged in the sleeve for driving the insertion rod to extend out of the sleeve.

[0010] Further, the driving mechanism comprises a coil fixedly installed on the inner end face of the sleeve, the coil is connected in series with a pressure detection meter, a magnet is fixedly installed on the end of the insertion rod in the sleeve, and the attractive force between the magnet and the coil is greater than the pulling force of the spring; Further, the insertion hole penetrates the cover plate, an extension rod is movably inserted in the insertion hole, a groove is formed in the side wall of the insertion hole, a first elastic rope is jointly installed between the extension rod and the groove; a clamping rod is fixedly installed on the end of the mounting rod, and a hole is formed in the end of the clamping rod and matched with the extension rod.

[0011] Further, the cover plate comprises a plate and a protrusion, the insertion hole is formed in the plate, and the protrusions are uniformly installed on the side wall of the cover plate close to the limiting sleeve.

[0012] Further, a cavity is formed in the protrusion, an air hole is formed in the side wall of the cavity close to the limiting sleeve, and a gas supply mechanism is arranged on the cover plate for supplying gas to the cavity.

[0013] Further, the gas supply mechanism comprises a mounting hole formed in the surface of the plate, a blocking rod is movably inserted in the mounting hole, an elastic air bag is jointly installed between the blocking rod and the end face of the mounting hole, and the output end of the elastic air bag extends into the cavity.

[0014] Further, the blocking rods and the protrusions are alternately distributed.

[0015] Further, the diameter of the air hole gradually increases with the increase of the distance from the plate; A second elastic rope is fixedly installed inside the vent. The two ends of the second elastic rope are fixedly connected to the inner walls on opposite sides of the vent. A spherical baffle is fixedly installed on the second elastic rope, and the ratio of the diameter of the baffle to the minimum diameter of the vent is 0.8-0.9.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) By setting up a cover plate, a limiting sleeve and a locking mechanism, this solution can limit the range of high-speed and irregular swinging of the cable at the moment of breakage during the detection process if the cable breaks. This improves the safety of the detection process.

[0017] (2) This solution uses the extension rod and the insertion rod to cooperate with each other. When the insertion rod is inserted into the insertion hole, the insertion rod pushes the extension rod. At this time, the extension rod extends out of the insertion hole and enters the hole. Therefore, under the action of the insertion rod and the extension rod, the cover plate can be limited from both ends. Therefore, when the cable breaks and hits the cover plate, it can prevent the cover plate from moving and play the role of limiting the broken cable in the limiting sleeve, which further improves safety.

[0018] (3) In this solution, the air supply mechanism and the air hole work together. When the air supply mechanism supplies air to the cavity, the cavity exhausts air through the air hole. The airflow discharged from the air hole impacts the surface of the limiting sleeve, thereby blowing away the impurities attached to the surface of the limiting sleeve and ensuring that the protrusion can fit with the limiting sleeve. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B; Figure 5 This is a cross-sectional view of the protrusion structure of the present invention; Figure 6 This is a cross-sectional view of the elastic telescopic rod of the present invention. Figure 7 This is a schematic diagram of the limiting sleeve of the present invention.

[0020] Explanation of the labels in the diagram: 1. Support rod; 2. Mounting plate; 3. Mounting rod; 4. Hydraulic cylinder; 5. Pressure gauge; 6. Connecting rod; 7. Limiting sleeve; 8. Through slot; 9. Elastic telescopic rod; 901. Mounting sleeve; 902. Movable rod; 903. Elastic element; 10. Cover plate; 1001. Plate; 1002. Protrusion; 11. Insertion hole; 12. Sleeve; 13. Insert rod; 14. Spring; 15. Coil; 16. Magnet; 17. Extension rod; 18. First elastic rope; 19. Locking rod; 20. Hole; 21. Cavity; 22. Air hole; 23. Stop bar; 24. Elastic airbag; 25. Second elastic rope; 26. Baffle block. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] Example 1: Please see Figures 1 to 7 A cable tensile testing device includes two support rods 1; The two support rods 1 are parallel to each other, and the two adjacent ends of the two support rods 1 are respectively equipped with mounting plates 2 and mounting rods 3; A hydraulic cylinder 4 is fixedly mounted on the mounting plate 2; a pressure gauge 5 is fixedly mounted on the output end of the hydraulic cylinder 4; the pressure gauge 5 is existing technology and will not be described in detail. The pressure gauge 5 includes a receiving end and a applying end. The receiving end of the pressure gauge 5 is fixedly installed on the output end of the hydraulic cylinder 4. The applying end of the pressure gauge 5 is fixedly connected to one end of the cable to be tested. Both the mounting rod 3 and the applying end of the pressure gauge 5 are equipped with clamps. When it is necessary to test cables: First, manually control hydraulic cylinder 4 to make its output end extend to its maximum position, which facilitates fixing the cable.

[0023] A connecting rod 6 is fixedly installed on the side wall of the support rod 1. The connecting rod 6 is perpendicular to the support rod 1 and parallel to the mounting rod 3. A limiting sleeve 7 with openings at both ends is fixedly installed at the end of the connecting rod 6; Furthermore, a through groove 8 is provided on the side wall of the limiting sleeve 7 away from the connecting rod 6, and the through groove 8 passes through both ends of the limiting sleeve 7; An elastic telescopic rod 9 is fixedly inserted into the side wall of the support rod 1. The elastic telescopic rod 9 is parallel to the connecting rod 6, and the elastic telescopic rod 9 and the connecting rod 6 are symmetrically distributed on the two support rods 1. A cover plate 10 that mates with the through slot 8 is fixedly installed on the output end of the elastic telescopic rod 9; Furthermore, a locking mechanism for fixing the cover plate 10 and the limiting sleeve 7 together is fixedly installed on the support rod 1; Then push the cover plate 10 to retract the elastic telescopic rod 9. At this time, the cover plate 10 is in contact with the support rod 1 away from the connecting rod 6. At the same time, the cable is passed through the through groove 8 and placed in the limiting sleeve 7, and both ends of the cable pass through the limiting sleeve 7. At this time, the elastic telescopic rod 9 is in the storage state. Then, the cover plate 10 is released, at which point the elastic telescopic rod 9 automatically extends, thereby enabling the cover plate 10 to fit against the side wall of the limiting sleeve 7. At this time, the cover plate 10 covers the surface of the through groove 8, thereby confining the cable in the limiting sleeve 7.

[0024] Then, two clamps are used to fix the two ends of the cable to be tested, that is, the two ends of the cable are fixed to the force-applying ends of the mounting rod 3 and the pressure gauge 5.

[0025] The testing can begin at this point.

[0026] During testing: First, power on the pressure gauge 5 to start working; at this time, the locking mechanism is triggered, and the locking mechanism tightly fixes the cover plate 10 and the limit sleeve 7 together; Then, the output end of the hydraulic cylinder 4 is controlled to retract. During this process, the cable is gradually stretched. At this time, the tension on the cable can be determined by reading the value output by the pressure sensor 5.

[0027] If the cable breaks during the inspection process, the limiting sleeve 7 and the cover plate 10 can limit the range of the cable's high-speed, irregular swinging at the moment of breakage, thus improving the safety of the inspection process.

[0028] The elastic telescopic rod 9 includes a mounting sleeve 901, a movable rod 902, and an elastic element 903. The mounting sleeve 901 is embedded in the support rod 1, and the end of the mounting sleeve 901 near the limiting sleeve 7 is open. The movable rod 902 is movably inserted into the open end of the mounting sleeve 901. The elastic element 903 is fixedly installed between the inner wall of the mounting sleeve 901 and the movable rod 902. When the movable rod 902 is not under force, it is in a state of extending out of the mounting sleeve 901 under the action of the elastic element 903.

[0029] like Figure 3 , Figure 4 As shown, the locking mechanism includes an insertion hole 11 at the end of the cover plate 10. A sleeve 12 that mates with the insertion hole 11 is fixedly installed on the side wall of the mounting plate 2. A rod 13 is slidably inserted into one end of the sleeve 12 near the insertion hole 11. A spring 14 is installed between the rod 13 and the inner wall of the sleeve 12. A drive mechanism for driving the rod 13 to extend out of the sleeve 12 is provided in the sleeve 12.

[0030] The drive mechanism includes a coil 15 fixedly installed on the inner end face of the sleeve 12. The coil 15 is connected in series with the pressure gauge 5. A magnet 16 is fixedly installed at one end of the insertion rod 13 located inside the sleeve 12, and the attraction between the magnet 16 and the energized coil 15 is greater than the tension of the spring 14. When the coil 15 is not energized, the insertion rod 13 is in the retracted state of the sleeve 12 under the action of the spring 14.

[0031] When the coil 15 is energized, a magnetic field is generated around the coil 15. At this time, the repulsive force on the magnet 16 is greater than the elastic force of the spring 14. At this time, the cover plate 10 is in a state of adhering to the surface of the through groove 8, and the insertion rod 13 is aligned with the insertion hole 11. Therefore, the magnet 16, which is subjected to repulsive force, pushes the insertion rod 13 to extend out of the sleeve 12 and insert into the insertion hole 11, thereby fixing the cover plate 10 to the surface of the through groove 8.

[0032] like Figure 2 , Figure 4 As shown, the insertion hole 11 penetrates the cover plate 10, and an extension rod 17 is slidably inserted into the insertion hole 11. A groove is provided on the side wall of the insertion hole 11, and a first elastic rope 18 is installed between the extension rod 17 and the groove. When the extension rod 17 is not under force, it is in the state of retracting into the insertion hole 11 under the action of the first elastic rope 18. A locking rod 19 is fixedly installed at the end of the mounting rod 3. A hole 20 that mates with the extension rod 17 is provided at the end of the locking rod 19. When the insertion rod 13 is inserted into the insertion hole 11, the insertion rod 13 pushes the extension rod 17. At this time, the extension rod 17 extends out of the insertion hole 11 and enters the hole 20. Therefore, under the action of the insertion rod 13 and the extension rod 17, the cover plate 10 can be limited from both ends. So when the cable breaks and hits the cover plate 10, it can prevent the cover plate 10 from moving, thus limiting the broken cable in the limiting sleeve 7 and further improving safety.

[0033] like Figure 4 As shown, the cover plate 10 includes a plate 1001 and a protrusion 1002. The insertion hole 11 is opened on the plate 1001, and the protrusion 1002 is evenly installed on the side wall of the cover plate 10 near the limiting sleeve 7.

[0034] A cavity 21 is provided on the protrusion 1002, and an air hole 22 is provided on the side wall of the cavity 21 near the limiting sleeve 7. The cover plate 10 is provided with an air supply mechanism for supplying air to the cavity 21.

[0035] The air supply mechanism includes a mounting hole on the surface of the plate 1001. A stop rod 23 is slidably inserted into the mounting hole. An elastic airbag 24 is installed between the stop rod 23 and the end face of the mounting hole. The output end of the elastic airbag 24 extends into the cavity 21. Since the elastic airbag 24 is elastic, when the stop rod 23 is not under force, the stop rod 23 is in the state of extending out of the mounting hole. When the cover plate 10 approaches the limiting sleeve 7, the stop rod 23 first contacts the side wall of the limiting sleeve 7. During this process, the stop rod 23 squeezes the elastic airbag 24. At this time, the gas in the elastic airbag 24 is discharged into the cavity 21, supplying air to the cavity 21.

[0036] Recycled cables used outdoors for extended periods will accumulate sand and gravel on their surface after exposure to wind and rain. During the process of passing the cable through the through-groove 8 and placing it in the limiting sleeve 7, the contact between the cable and the outer wall of the limiting sleeve 7 can easily cause solid impurities such as sand and gravel to adhere to the surface of the limiting sleeve 7.

[0037] By setting the protrusion 1002, the contact area between the limiting sleeve 7 and the cover plate 10 can be reduced when the cover plate 10 and the limiting sleeve 7 are in contact. Therefore, when used outdoors, if there are impurities such as sand or gravel on the surface of the cover plate 10 or the surface of the limiting sleeve 7, the probability of sand or gravel or other impurities being present at the part of the limiting sleeve 7 that is about to contact the protrusion 1002 is reduced.

[0038] At the same time, when the cover plate 10 is close to the limiting sleeve 7, the air supply mechanism supplies air to the cavity 21, and the cavity 21 exhausts air through the air hole 22. The airflow discharged from the air hole 22 impacts the surface of the limiting sleeve 7, thereby blowing away the impurities attached to the surface of the limiting sleeve 7, which plays the role of ensuring that the protrusion 1002 can fit with the limiting sleeve 7.

[0039] Meanwhile, when the protrusion 1002 is in contact with the limiting sleeve 7, the applicability of the device is expanded. When testing cables with smaller diameters, the cable can also be fixed to prevent it from being thrown out from the gap between the limiting sleeve 7 and the cover plate 10.

[0040] like Figure 2 As shown, the stop bar 23 and the protrusion 1002 are alternately distributed, thereby shortening the gap between two adjacent protrusions 1002. Therefore, when the cable breaks, the range of motion of the cable is further restricted, preventing the cable from being thrown out from the gap between two adjacent protrusions 1002.

[0041] like Figure 4 As shown, the diameter of the pore 22 gradually increases with the increase of the distance from the plate 1001; A second elastic rope 25 is fixedly installed inside the air hole 22. The two ends of the second elastic rope 25 are fixedly connected to the inner walls on opposite sides of the air hole 22. A spherical baffle 26 is fixedly installed on the second elastic rope 25. The ratio of the diameter of the baffle 26 to the minimum diameter of the air hole 22 is 0.8-0.9. Therefore, when the cover plate 10 separates from the limiting sleeve 7 and the elastic airbag 24 is restored, the elastic airbag 24 will draw air from the outside through the gap between the cavity 21, the air hole 22 and the baffle 26, which serves to prepare for the next operation.

[0042] Therefore, when the air vent 22 exhausts air outward, the airflow flowing through the air vent 22 impacts the turbulence block 26. At this time, under the action of the second elastic rope 25, the turbulence block 26 begins to shake. Under the action of the arc surface of the turbulence block 26, the direction of the airflow is changed, thereby increasing the contact area between the airflow discharged from the air vent 22 and the end face of the limiting sleeve 7, expanding the cleaning area of ​​the part of the limiting sleeve 7 that is about to contact the protrusion 1002, improving the cleaning effect on the surface of the limiting sleeve 7, and ensuring that the protrusion 1002 can fit against the surface of the limiting sleeve 7.

[0043] Instructions for use: When it is necessary to test the cable: First, manually control hydraulic cylinder 4 to make its output end extend to its maximum position, which facilitates fixing the cable.

[0044] Then push the cover plate 10 to retract the elastic telescopic rod 9. At this time, the cover plate 10 is in contact with the support rod 1 away from the connecting rod 6. At the same time, the cable is passed through the through groove 8 and placed in the limiting sleeve 7, and both ends of the cable pass through the limiting sleeve 7. At this time, the elastic telescopic rod 9 is in the storage state. Then, the cover plate 10 is released, at which point the elastic telescopic rod 9 automatically extends, thereby enabling the cover plate 10 to fit against the side wall of the limiting sleeve 7. At this time, the cover plate 10 covers the surface of the through groove 8, thereby confining the cable in the limiting sleeve 7.

[0045] Then, two clamps are used to fix the two ends of the cable to be tested, that is, the two ends of the cable are fixed to the force-applying ends of the mounting rod 3 and the pressure gauge 5.

[0046] The testing can begin at this point.

[0047] During testing: First, power on the pressure gauge 5 to start working; at this time, the locking mechanism is triggered, and the locking mechanism tightly fixes the cover plate 10 and the limit sleeve 7 together; Then, the output end of the hydraulic cylinder 4 is controlled to retract. During this process, the cable is gradually stretched. At this time, the tension on the cable can be determined by reading the value output by the pressure sensor 5.

[0048] If the cable breaks during the inspection process, the limiting sleeve 7 and the cover plate 10 can limit the range of the cable's high-speed, irregular swinging at the moment of breakage, thus improving the safety of the inspection process.

[0049] When the insertion rod 13 is inserted into the insertion hole 11, the insertion rod 13 pushes the extension rod 17, which then extends out of the insertion hole 11 and enters the hole 20. Therefore, under the action of the insertion rod 13 and the extension rod 17, the cover plate 10 can be limited from both ends. Thus, when the cable breaks and impacts the cover plate 10, it prevents the cover plate 10 from moving, effectively confining the broken cable within the limiting sleeve 7, further improving safety. Because the elastic airbag 24 is elastic, when the stop rod 23 is not under force, it is in a state of extending from the mounting hole. When the cover plate 10 approaches the limiting sleeve 7, the stop rod 23 first contacts the side wall of the limiting sleeve 7. During this process, the stop rod 23 compresses the elastic airbag 24, at which point the gas in the elastic airbag 24 is released into the cavity 21, supplying air to the cavity 21.

[0050] Recycled cables used outdoors for extended periods will accumulate sand and gravel on their surface after exposure to wind and rain. During the process of passing the cable through the through-groove 8 and placing it in the limiting sleeve 7, the contact between the cable and the outer wall of the limiting sleeve 7 can easily cause solid impurities such as sand and gravel to adhere to the surface of the limiting sleeve 7.

[0051] By setting the protrusion 1002, the contact area between the limiting sleeve 7 and the cover plate 10 can be reduced when the cover plate 10 and the limiting sleeve 7 are in contact. Therefore, when used outdoors, when there are impurities such as sand or gravel on the surface of the cover plate 10 or the surface of the limiting sleeve 7, the probability of sand or gravel or other impurities being present at the part of the limiting sleeve 7 that is about to contact the protrusion 1002 is reduced. Meanwhile, when the cover plate 10 is close to the limiting sleeve 7 and the air supply mechanism supplies air to the cavity 21, the cavity 21 exhausts air through the air hole 22. The airflow discharged from the air hole 22 impacts the surface of the limiting sleeve 7, thereby blowing away the impurities attached to the surface of the limiting sleeve 7 and ensuring that the protrusion 1002 can fit with the limiting sleeve 7.

[0052] Meanwhile, when the protrusion 1002 is in contact with the limiting sleeve 7, the applicability of the device is expanded. When inspecting cables with smaller diameters, the cable can also be fixed to prevent it from being thrown out from the gap between the limiting sleeve 7 and the cover plate 10. When the cover plate 10 separates from the limiting sleeve 7 and the elastic airbag 24 returns to its original position, the elastic airbag 24 will draw air from the outside through the gap between the cavity 21, the air hole 22 and the baffle block 26, thus preparing for the next operation.

[0053] Therefore, when the air vent 22 exhausts air outward, the airflow flowing through the air vent 22 impacts the baffle block 26. At this time, under the action of the elastic rope, the baffle block 26 begins to shake. Under the action of the arc surface of the baffle block 26, the direction of the airflow is changed, thereby increasing the contact area between the airflow discharged from the air vent 22 and the end face of the limiting sleeve 7, expanding the cleaning area of ​​the part of the limiting sleeve 7 that is about to contact the protrusion 1002, improving the cleaning effect on the surface of the limiting sleeve 7, and ensuring that the protrusion 1002 can fit against the surface of the limiting sleeve 7.

[0054] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A cable tensile testing device, comprising two support rods (1); Its features are: The two support rods (1) are parallel to each other, and the two adjacent ends of the two support rods (1) are respectively equipped with mounting plates (2) and mounting rods (3); A hydraulic cylinder (4) is fixedly installed on the mounting plate (2); a pressure gauge (5) is fixedly installed on the output end of the hydraulic cylinder (4); A connecting rod (6) is fixedly installed on the side wall of the support rod (1). The connecting rod (6) is perpendicular to the support rod (1) and parallel to the mounting rod (3). The end of the connecting rod (6) is fixedly fitted with a limiting sleeve (7) with openings at both ends; Furthermore, a through groove (8) is provided on the side wall of the limiting sleeve (7) away from the connecting rod (6), and the through groove (8) passes through both ends of the limiting sleeve (7); An elastic telescopic rod (9) is fixedly inserted into the side wall of the support rod (1). The elastic telescopic rod (9) is parallel to the connecting rod (6), and the elastic telescopic rod (9) and the connecting rod (6) are symmetrically distributed on the two support rods (1). The output end of the elastic telescopic rod (9) is fixedly installed with a cover plate (10) that cooperates with the through groove (8). Furthermore, a locking mechanism for fixing the cover plate (10) and the limiting sleeve (7) together is fixedly installed on the support rod (1).

2. The cable tensile strength testing device according to claim 1, characterized in that: The elastic telescopic rod (9) includes a mounting sleeve (901), a movable rod (902), and an elastic element (903). The mounting sleeve (901) is embedded in the support rod (1). The mounting sleeve (901) has an opening at one end near the limiting sleeve (7). The movable rod (902) is movably inserted into the opening end of the mounting sleeve (901). The elastic element (903) is fixedly installed between the inner wall of the mounting sleeve (901) and the movable rod (902).

3. The cable tensile strength testing device according to claim 2, characterized in that: The locking mechanism includes an insertion hole (11) at the end of the cover plate (10). A sleeve (12) that mates with the insertion hole (11) is fixedly installed on the side wall of the mounting plate (2). A rod (13) is slidably inserted into one end of the sleeve (12) near the insertion hole (11). A spring (14) is installed between the rod (13) and the inner wall of the sleeve (12). A driving mechanism for driving the rod (13) to extend out of the sleeve (12) is provided in the sleeve (12).

4. The cable tensile strength testing device according to claim 3, characterized in that: The driving mechanism includes a coil (15) fixedly installed on the inner end face of the sleeve (12), the coil (15) being connected in series with the pressure gauge (5), and a magnet (16) being fixedly installed at one end of the insert rod (13) inside the sleeve (12), and the attraction between the magnet (16) and the energized coil (15) is greater than the tension of the spring (14).

5. The cable tensile strength testing device according to claim 4, characterized in that: The insertion hole (11) penetrates the cover plate (10), and an extension rod (17) is slidably inserted into the insertion hole (11). A groove is provided on the side wall of the insertion hole (11), and a first elastic rope (18) is installed between the extension rod (17) and the groove. A locking rod (19) is fixedly installed at the end of the mounting rod (3), and a hole (20) is provided at the end of the locking rod (19) to cooperate with the extension rod (17).

6. The cable tensile strength testing device according to claim 5, characterized in that: The cover plate (10) includes a plate (1001) and a protrusion (1002). The insertion hole (11) is opened on the plate (1001), and the protrusion (1002) is evenly installed on the side wall of the cover plate (10) near the limiting sleeve (7).

7. A cable tensile testing device according to claim 6, characterized in that: A cavity (21) is provided on the protrusion (1002), and an air hole (22) is provided on the side wall of the cavity (21) near the limiting sleeve (7), and an air supply mechanism for supplying air to the cavity (21) is provided on the cover plate (10).

8. A cable tensile testing device according to claim 7, characterized in that: The air supply mechanism includes a mounting hole on the surface of the plate (1001), a stop bar (23) is slidably inserted in the mounting hole, and an elastic airbag (24) is installed between the stop bar (23) and the end face of the mounting hole. The output end of the elastic airbag (24) extends into the cavity (21).

9. A cable tensile testing device according to claim 8, characterized in that: The stop bar (23) and the protrusion (1002) are alternately distributed.

10. A cable tensile testing device according to claim 9, characterized in that: The diameter of the pores (22) gradually increases with the increase of the distance from the plate (1001); A second elastic rope (25) is fixedly installed inside the air hole (22). The two ends of the second elastic rope (25) are fixedly connected to the inner walls of the air hole (22) on opposite sides. A spherical baffle (26) is fixedly installed on the second elastic rope (25), and the ratio of the diameter of the baffle (26) to the minimum diameter of the air hole (22) is 0.8-0.9.

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