CN115326562A

CN115326562A - Overhead insulated wire tensile test device

Info

Publication number: CN115326562A
Application number: CN202210952058.0A
Authority: CN
Inventors: 田霖; 张达; 刘振; 张志猛; 刘良帅; 梁博渊
Original assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2022-11-11

Abstract

The invention discloses an overhead insulated wire tensile test device which comprises a first U-shaped plate, wherein two first sliding rods are arranged between the left side plate and the right side plate of the first U-shaped plate, the outer surface of the first sliding rods is connected with two first sliding sleeves in a sliding mode, a second U-shaped plate is fixedly connected between the front sliding sleeve and the rear sliding sleeve, and the second U-shaped plate on the right side is fixedly connected with the right side plate of the first U-shaped plate. The handle drives the rotating shaft I and the bevel gear I to rotate, the bevel gear I can drive the screw rod II to rotate through matching with the bevel gear II, the screw rod II can drive the two arc-shaped plates to approach each other through matching with the threaded sleeve II, the sliding rod II, the sliding sleeve III and the connecting rod, one end of an insulating wire can be clamped through the two arc-shaped plates, so that the operation of the device is convenient, and the device can adapt to insulating wires with different diameters through adjusting the distance between the two arc-shaped plates, so that the device has wide adaptability.

Description

Overhead insulated wire tensile test device

Technical Field

The invention relates to a cable testing device, in particular to an overhead insulated wire tension testing device.

Background

The electric energy is an important energy source necessary for the development of the current society, the supply capacity of the electric power also represents the level of the national industry to a certain extent, the power grid is an important system of the electric power supply, the power grid comprises a power transmission grid and a power distribution network, the structure of a large-scale power grid is generally layered according to voltage grades, the power transmission grid mainly raises the voltage of a large amount of electric energy of a power plant far away from a load center through a transformer, the electric energy is transmitted to a hub substation adjacent to the load center through a high-voltage transmission line, meanwhile, the power transmission grid also has the function of connecting an adjacent power system and the adjacent substation or directly supplies power to certain users with extra-large capacity, the rated voltage of the power transmission grid is generally 220-750kV or higher, the structure of the power transmission grid has great relation with the safety and the economy of the operation of the power system, and is a framework or a power grid backbone of the whole power system, and the high-voltage and medium-voltage distribution network distributes the electric energy from the substation to a plurality of distribution transformers and directly supplies power to customers with medium capacity; a low-voltage distribution network is used for supplying power to a large number of small customers, urban power supply planning is realized by determining a power network structure according to the prediction of power consumption and load and the characteristics of the power network, reasonably selecting and arranging the wiring modes of voltage networks, transformer substations and power networks at all levels, ensuring that the power network structure meets the requirements of power supply reliability, safety, operation economy, flexibility and the like, balancing all links of the power network, planning into an urban power network with sufficient comprehensive power supply capacity, ensuring that the width of a corridor of a high-voltage overhead transmission line in the urban area meets the safety requirement, and introducing high-voltage transmission lines of the transformer substations to underground cables in the busy areas and main streets of large and medium cities.

In an electric power system, the use of insulated wires is extremely large, and the insulated wires are formed by uniformly and hermetically wrapping a layer of non-conductive material on the periphery of a wire, such as: resin, plastic, silicon rubber, PVC and the like form an insulating layer, so that an insulated wire is prevented from being contacted with the outside to cause electric leakage, short circuit, electric shock and other accidents, along with the development of the power supply industry in recent years, the position of a three-layer insulated wire as a main insulating material of a transformer is increasingly highlighted, and along with the popularization of automatic production, the traditional manual wrapping and CNC wrapping are replaced in the winding process of the transformer, so that higher requirements are put forward on the scratch resistance of the three-layer insulated wire, in a large-scale power system, the parameter requirements on the insulated wire are very strict, one of the three-layer insulated wire needs to bear certain tension, so that the insulated wire can bear dead weight after being overhead, and therefore, the tension test of the insulated wire needs to be carried out before leaving a factory.

Disclosure of Invention

The invention aims to provide an overhead insulated wire tensile test device, which solves the problems that the conventional test device in the background art is still lack of convenience in use, adaptability to products, accuracy of test results and the like.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an overhead insulated wire tensile test device, includes U template one, be provided with two slide bars one between the left and right sides board of U template one, and slide bar surface sliding connection has two sliding sleeves one, and fixedly connected with U template two between two sliding sleeves one around, and the right side board fixed connection of U template two and U template one on right side, equal joint has bearing two in the wall of both sides around U template one, and has cup jointed pivot two in the bearing two, and the equal fixedly connected with fixed plate one of looks remote site of two pivot two, and the opposite face of two fixed plate one respectively with the front and back both sides fixed connection of receipts reel, and the worm wheel has been cup jointed to the outer surface of front side pivot, two fixed plate two of U template front side fixedly connected with, and the joint has bearing three in the fixed plate two, and cup jointed the both ends optical axis department of worm in two bearing three respectively.

According to a preferable technical scheme of the invention, two bearings IV are clamped in the winding cylinder, optical axes at two ends of the screw rod II are respectively sleeved in the two bearings IV, a bevel gear II is sleeved at the optical axis on the outer surface of the screw rod II, two threads with opposite directions are arranged on the outer surface of the screw rod, the outer surface of each thread is in threaded connection with a thread sleeve II, the right end of the worm is fixedly connected with a handle II, and the worm is meshed with the worm wheel.

As a preferred technical scheme of the invention, a second sliding rod is arranged in the rolling cylinder, two third sliding sleeves are connected to the outer surfaces of the sliding rods in a sliding manner, the third sliding sleeves and the second threaded sleeves which are opposite to each other in the front-back direction are fixedly connected through connecting rods, and arc-shaped plates are fixedly connected to the opposite sides of the two connecting rods.

As a preferred technical scheme of the invention, a first bearing is clamped in the winding cylinder, a first rotating shaft is sleeved in the first bearing, the upper end of the first rotating shaft is fixedly connected with a first handle, and the lower end of the first rotating shaft is sleeved with a first bevel gear.

As a preferred technical scheme of the invention, a bearing five is clamped in the left side wall of the U-shaped plate I, the left end optical axis of the screw rod I is sleeved in the bearing five, the left end of the screw rod I is fixedly connected with the output shaft of the motor, and the motor is fixedly connected with the U-shaped plate I through a motor base.

As a preferred technical scheme, the outer surface of the first screw rod is in threaded connection with a first threaded sleeve, the first threaded sleeve is clamped in a third fixed plate, the outer surface of the first sliding rod is in sliding connection with a second sliding sleeve, and the two second sliding sleeves are clamped in the third fixed plate.

According to a preferable technical scheme of the invention, the right side of the third fixing plate is fixedly connected with a tension sensor body, the tension sensor body is fixedly connected with a hook through a steel rope, and the left side surface of the left U-shaped plate II is fixedly connected with a fixing ring.

As a preferred technical scheme of the invention, the right side of the U-shaped plate I is fixedly connected with a control switch, and the control switch is respectively and electrically connected with the motor and the tension sensor body through leads.

As a preferred technical scheme of the invention, the first bevel gear is meshed with the second bevel gear, and a through hole is formed in the winding barrel.

As a preferable technical scheme of the invention, the fixing ring is matched with the hook.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the rotating shaft I and the bevel gear I are driven to rotate by the handle, the bevel gear I can drive the screw rod II to rotate by matching with the bevel gear II, the screw rod II can drive the two arc-shaped plates to approach each other by matching with the threaded sleeve II, the sliding rod II, the sliding sleeve III and the connecting rod, and one end of an insulating wire can be clamped by the two arc-shaped plates, so that the device has convenience in operation.

2. According to the invention, the worm is rotated by the handle II, the worm can drive the winding drum to rotate through matching with the worm wheel, the front rotating shaft II, the rear rotating shaft II and the two fixing plates I, the insulated wire can be wound by the two winding drums, so that the insulated wire between the two winding drums gradually tends to be straight, further, when the insulated wire is pulled, the two fixed ends of the insulated wire are uniformly stressed to ensure the accuracy of a test result, then the motor drives the screw rod I to reversely rotate, the screw rod I can drive the fixing plate III to move leftwards through matching with the thread sleeve I, the slide rod I and the sliding sleeve II, the fixing plate III can drive the tension sensor body, the steel rope, the hook, the fixing ring and the left U-shaped plate to move leftwards, and further, the insulated wire can be gradually tightened until the insulated wire is completely pulled off, and therefore, the maximum tension value which can be borne by the insulated wire can be known through the tension sensor body.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic perspective view of a U-shaped plate according to the present invention;

FIG. 3 is a schematic diagram of a first three-dimensional structure and a second three-dimensional structure of a U-shaped plate of the invention;

FIG. 4 is a schematic perspective view of a U-shaped plate II according to the present invention;

FIG. 5 is a schematic perspective view of an enlarged motor structure according to the present invention;

FIG. 6 is a schematic perspective view of an enlarged winding drum structure according to the present invention;

FIG. 7 is an enlarged perspective sectional view of the winding drum according to the present invention;

fig. 8 is a schematic perspective view of a fixing plate according to the present invention.

In the figure: the device comprises a first U-shaped plate 1, a second control switch 2, a second U-shaped plate 3, a first take-up drum 4, a through hole 5, a first handle 6, a first rotating shaft 7, a first fixing plate 8, a second fixing plate 9, a connecting rod 10, a second rotating shaft 11, a worm 12, a worm wheel 13, a second handle 14, a first sliding sleeve 15, a first sliding rod 16, a third fixing plate 17, a second sliding sleeve 18, a first threaded sleeve 19, a first screw rod 20, a first tension sensor body 21, a steel rope 22, a hook 23, a motor 24, a motor base 25, a fixing ring 26, a first bevel gear 27, a second bevel gear 28, a second screw rod 29, a second threaded sleeve 30, a second sliding rod 31, a first arc-shaped plate 32 and a third sliding sleeve 33.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 8, the present invention provides a technical solution: a tension test device for an overhead insulated wire comprises a U-shaped plate I1, two sliding rods I16 are arranged between the left side plate and the right side plate of the U-shaped plate I1, the outer surface of each sliding rod I16 is connected with two sliding sleeves I15 in a sliding mode, the sliding sleeves I15 can be limited by the aid of the sliding rods I16, so that the sliding sleeves I15 have stability in the moving process, a U-shaped plate II 3 is fixedly connected between the front sliding sleeves I and the rear sliding sleeves I15, the U-shaped plate II 3 on the right side is fixedly connected with the right side plate of the U-shaped plate I1, bearings II are clamped in the front side wall and the rear side wall of the U-shaped plate I1 respectively, a rotating shaft II 11 is sleeved in each bearing II, opposite ends of the two rotating shafts II 11 are fixedly connected with fixing plates I8, opposite surfaces of the two fixing plates I8 are fixedly connected with the front side and the rear side of a winding cylinder 4 respectively, worm wheels 13 are sleeved on the outer surface of the front side rotating shaft II 11, two fixing plates 9 are fixedly connected to the front side of the U-shaped plate II 1, a third bearing is clamped in the second fixing plate 9, optical axes at two ends of a worm 12 are respectively sleeved in the third bearing, the right end of the worm 12 is fixedly connected with a second handle 14, the worm 12 is driven to rotate by the second handle 14, the worm 12 can drive the winding drum 4 on the right side to rotate clockwise by matching with a worm wheel 13, a front rotating shaft two 11, a rear rotating shaft two 11 and two first fixing plates 8, and then the handle 14 on the left side is rotated, so that the worm 12 connected with the worm can rotate, the worm 12 can drive the winding drum 4 on the left side to rotate anticlockwise by matching with the worm wheel 13, the front rotating shaft two 11, the rear rotating shaft two 11 and the two first fixing plates 8, the insulating wire can be wound by the two winding drums 4, so that the insulating wire between the two winding drums 4 gradually tends to be straight, and the insulating wire is wound on the winding drum 4, when the insulated wire is pulled, the two fixed ends of the insulated wire are uniformly stressed, if the insulated wire is directly pulled after being fixed by the two groups of arc-shaped plates 32, the insulated wire is easily stressed too much in the contact positions with the arc-shaped plates 32 and then is broken, the accuracy of a test result cannot be ensured, the worm 12 is meshed with the worm wheel 13, the two bearings are clamped in the winding cylinder 4, the worm wheel 13 and the worm 12 have good self-locking performance while transmission is realized, namely the worm 12 can drive the worm wheel 13 to rotate, the worm wheel 13 cannot drive the worm 12 to rotate, and due to the characteristics of the transmission structure, the device adopts a transmission mode of the worm 12 and the worm wheel 13 at the position, the transmission ratio of the worm wheel 13 and the worm 12 can be large, and the device is more compact than a staggered shaft helical gear mechanism, when the lead angle of the worm 12 is smaller than the equivalent friction angle between the meshing worm wheels 13, the mechanism has self-locking performance, the optical axes of the two ends of the screw second 29 are respectively sleeved in the two bearings, the bevel gear second 28 is sleeved on the optical axis of the outer surface of the screw second 29, the outer surface of the screw second 29 is provided with two opposite threads in two directions, so that the two thread sleeves second 30 on the outer surface of the screw second 29 can be close to each other when the screw second 29 rotates, the outer surface of each thread is in threaded connection with the thread sleeve second 30, the winding drum 4 is internally provided with the slide rod second 31, the outer surface of the slide rod second 31 is in sliding connection with the two sliding sleeves third 33, the sliding sleeves third 33 can be limited by the slide rod second 31, so that the sliding sleeves third 33 has stability in the moving process, and the front and back opposite sliding sleeves third 33 and the thread sleeves second 30 are fixedly connected through the connecting rod 10, the opposite sides of the two connecting rods 10 are fixedly connected with arc plates 32, the radian of the arc plates 32 is not semicircular, and the circumferential surface of the insulated wire is generally circular, so that the insulated wires with different diameters can be clamped by adjusting the distance between the two arc plates 32 through the matching of the two arc plates 32, a first bearing is clamped in the winding cylinder 4, a first rotating shaft 7 is sleeved in the first bearing, a first handle 6 is fixedly connected to the upper end of the first rotating shaft 7, the first rotating shaft 7 and a first bevel gear 27 are driven to rotate through the first handle 6, the second bevel gear 29 can be driven to rotate through the matching of the first bevel gear 28, the second screw 29 can drive the two arc plates 32 to approach each other through the matching of a second threaded sleeve 30, a second sliding rod 31, a third sliding sleeve 33 and the connecting rods 10, the insulated wire can be clamped through the arc plates 32, and the first bevel gear 27 is sleeved at the lower end of the first rotating shaft 7, the first bevel gear 27 is meshed with the second bevel gear 28, the through hole 5 is formed in the winding cylinder 4, the fifth bearing is clamped in the left side wall of the first U-shaped plate 1, the optical axis of the left end of the first screw rod 20 is sleeved in the fifth bearing, the left end of the first screw rod 20 is fixedly connected with the output shaft of the motor 24, the first screw rod 20 is driven by the motor 24 to rotate, the first screw rod 20 can drive the third fixing plate 17 to move rightwards through matching with the first threaded sleeve 19, the first sliding rod 16 and the second sliding sleeve 18, so that the motor 24 rotates reversely, the third fixing plate 17 can move leftwards, the motor 24 is fixedly connected with the first U-shaped plate 1 through the motor base 25, the first threaded sleeve 19 is connected to the outer surface of the first screw rod 20 in a threaded manner, the first threaded sleeve 19 is clamped in the third fixing plate 17, the second sliding sleeve 18 is slidably connected to the outer surface of the first sliding rod 16, and the second sliding sleeve 18 can be limited through the first sliding rod 16, so that the second sliding sleeve 18 has stability in the motion process, the two sliding sleeves II 18 are clamped in the fixed plate III 17, the right side of the fixed plate III 17 is fixedly connected with a tension sensor body 21, the tension sensor body 21 is fixedly connected with a hook 23 through a steel rope 22, the fixed plate III 17 moves rightwards, the hook 23 is close to a fixed ring 26, the hook 23 is hung on the fixed ring 26, then a motor 24 drives a screw rod I20 to rotate reversely through a control switch 2, the screw rod I20 can drive the fixed plate III 17 to move leftwards through matching with a threaded sleeve I19, a sliding rod I16 and the sliding sleeves II 18, the left side face of the left U-shaped plate II 3 is fixedly connected with the fixed ring 26, the fixed ring 26 is matched with the hook 23, the tension sensor body 21, a steel rope 22, the hook 23, the fixed ring 26 and the left U-shaped plate II 3 can be driven to move leftwards through the fixed plate III 17, an insulated wire can be gradually tightened until the tension insulated wire is completely pulled off, and therefore the maximum tension value which can be borne by the insulated wire can be obtained through the insulated wire sensor body 21, the right side of the U-I1 is fixedly connected with the control switch 2, and the control switch 2 is respectively electrically connected with the motor 24 and the tension sensor body 21 through a wire.

The method comprises the following operation steps:

s1, inserting one end of an insulated wire to be tested into a through hole 5 of a right winding drum 4, enabling the insulated wire to be positioned between two arc-shaped plates 32, then inserting the other end of the insulated wire into the through hole 5 of a left winding drum 4, then respectively rotating two handles I6, driving a rotating shaft I7 and a bevel gear I27 to rotate through the handles I6, driving a screw rod II 29 to rotate through the cooperation of the bevel gear I27 and a bevel gear II 28, driving the two arc-shaped plates 32 to be close to each other through the cooperation of the screw rod II 29, a threaded sleeve II 30, a sliding rod II 31, a sliding sleeve III 33 and a connecting rod 10, and clamping the insulated wire through the arc-shaped plates 32;

s2, then rotating the right handle II 14 to rotate the worm 12 connected with the right handle II, wherein the worm 12 can drive the right winding drum 4 to rotate clockwise through the matching of the worm wheel 13, the front rotating shaft II 11, the rear rotating shaft II 11 and the two fixing plates I8, and then rotating the left handle II 14 to rotate the worm 12 connected with the left handle II, the worm 12 can drive the left winding drum 4 to rotate anticlockwise through the matching of the worm wheel 13, the front rotating shaft II 11, the rear rotating shaft II 11 and the two fixing plates I8, and the two winding drums 4 can wind the insulated wire, so that the insulated wire between the two winding drums 4 gradually tends to be straight;

s3, the motor 24 drives the screw rod I20 to rotate through the control switch 2, the screw rod I20 can drive the fixing plate III 17 to move rightwards through the matching of the screw rod I19, the slide rod I16 and the slide sleeve II 18, the hook 23 is close to the fixing ring 26, the hook 23 is hung on the fixing ring 26, then the motor 24 drives the screw rod I20 to rotate reversely through the control switch 2, the screw rod I20 can drive the fixing plate III 17 to move leftwards through the matching of the screw rod I19, the slide rod I16 and the slide sleeve II 18, and meanwhile the tension sensor body 21 is started through the control switch 2;

s4, can drive the force sensor body 21 through fixed plate three 17, the steel cable 22, couple 23, solid fixed ring 26 and the left U template two 3 move to the left, and then can make the insulated wire tighten gradually, until being broken completely, thereby alright learn the biggest tension value that this insulated wire can bear through force sensor body 21, after the test is accomplished, through reverse rotation handle one 6, make handle one 6 drive pivot one 7 and bevel gear one 27 and rotate, bevel gear one 27 can drive screw rod two 29 through the cooperation with bevel gear two 28 and rotate, screw rod two 29 is through the cooperation with thread bush two 30, slide rod two 31, sliding sleeve three 33 and connecting rod 10, can drive two arc boards 32 and keep away from each other, make two arc boards 32 break away from with the insulated wire, thereby alright take off the insulated wire of winding on receipts reel 4, so that the device uses next time.

In the description of the present invention, it is to be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience in describing the present invention and simplifying the description, but are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

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

Claims

1. The utility model provides an overhead insulated wire tensile test device, includes U template one (1), its characterized in that: be provided with two slide bar (16) between the left and right sides board of U template (1), and slide bar (16) surface sliding connection has two sliding sleeve (15), and fixedly connected with U template two (3) between two sliding sleeve (15) around, and the right side board fixed connection of U template two (3) and U template (1) on right side, equal joint has bearing two in the wall of the front and back both sides of U template (1), and has cup jointed pivot two (11) in the bearing two, and the equal fixedly connected with fixed plate (8) of looks remote site of two pivot two (11), and the opposite face of two fixed plate one (8) respectively with the front and back both sides fixed connection of a rolling section of thick bamboo (4), and front side pivot two (11) surface has cup jointed worm wheel (13), two fixed plate two (9) of U template (1) front side fixedly connected with, and the joint has bearing three in fixed plate two (9), and has cup jointed the optical axis department of worm (12) in two bearing three respectively.

2. The overhead insulated wire tensile test apparatus according to claim 1, wherein: two bearings are connected in the winding drum (4) in a clamping mode, two optical axes of two ends of the screw rod II (29) are respectively sleeved in the two bearings, the bevel gear II (28) is sleeved on the optical axis of the outer surface of the screw rod II (29), threads in two opposite directions are formed in the outer surface of the screw rod II (29), the thread sleeve II (30) is connected to the outer surface of each thread in a threaded mode, the handle II (14) is fixedly connected to the right end of the worm (12), and the worm (12) is meshed with the worm wheel (13).

3. The overhead insulated wire tensile test device according to claim 1, characterized in that: a second sliding rod (31) is arranged in the winding drum (4), the outer surface of the second sliding rod (31) is connected with a third sliding sleeve (33) in a sliding mode, the third sliding sleeve (33) and the second threaded sleeve (30) which are opposite in front and back are fixedly connected through a connecting rod (10), and the opposite sides of the two connecting rods (10) are fixedly connected with arc-shaped plates (32).

4. The overhead insulated wire tensile test device according to claim 1, characterized in that: the winding drum (4) is internally clamped with a first bearing, a first rotating shaft (7) is sleeved in the first bearing, the upper end of the first rotating shaft (7) is fixedly connected with a first handle (6), and the lower end of the first rotating shaft (7) is sleeved with a first bevel gear (27).

5. The overhead insulated wire tensile test apparatus according to claim 1, wherein: the left side wall of U template one (1) is interior to be pegged graft and is had bearing five, and the left end optical axis department that has cup jointed screw rod one (20) in bearing five, and screw rod one (20) left end and motor (24) output shaft fixed connection, and motor (24) pass through motor cabinet (25) and U template one (1) fixed connection.

6. An overhead insulated wire tensile test apparatus according to claim 5, wherein: the outer surface of the first screw rod (20) is in threaded connection with a first threaded sleeve (19), the first threaded sleeve (19) is connected in a third fixing plate (17) in a clamped mode, the outer surface of the first sliding rod (16) is in sliding connection with a second sliding sleeve (18), and the two second sliding sleeves (18) are connected in a clamped mode in the third fixing plate (17) in a clamped mode.

7. An overhead insulated wire tensile test apparatus according to claim 6, wherein: the fixed plate III (17) is fixedly connected with a tension sensor body (21) on the right side, the tension sensor body (21) is fixedly connected with a hook (23) through a steel rope (22), and a fixed ring (26) is fixedly connected to the left side face of the left U-shaped plate II (3).

8. The overhead insulated wire tensile test device according to claim 1, characterized in that: the right side of the U-shaped plate I (1) is fixedly connected with a control switch (2), and the control switch (2) is electrically connected with a motor (24) and a tension sensor body (21) through wires respectively.

9. An overhead insulated wire tensile test apparatus according to claim 4, wherein: the first bevel gear (27) is meshed with the second bevel gear (28), and a through hole (5) is formed in the winding drum (4).

10. An overhead insulated wire tensile test apparatus according to claim 7, wherein: the fixing ring (26) is matched with the hook (23).