Power line testing device

Abstract

The invention relates to the technical field of electric power testing, and particularly discloses a power line testing device, which comprises a lower testing box frame and an upper testing box frame, and is characterized in that a detection cavity with a cuboid-shaped inner side contour is formed between the lower testing box frame and the upper testing box frame; openings are formed in the two ends, in the length direction of the detection cavity, of the upper test box frame respectively, each opening is provided with an opening and closing door structure used for controlling the opening and closing of the opening, and a negative pressure suction assembly used for achieving exhaust vacuum of the detection cavity is arranged on the lower test box frame; the closed detection chamber is formed by the lower test box frame and the upper test box frame, the sealing performance is enhanced in cooperation with the sealing embedded edge, the sealing embedded groove and the sealing gasket, a stable vacuum environment can be created in combination with the negative pressure suction assembly, interference of external air, water vapor and impurities is effectively isolated, and the accuracy of a test result is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power testing, in particular to a power line testing device. BACKGROUND

[0002] As the core carrier for transmitting and distributing electric energy in the power system, the operation state of the cable is directly related to the safety, reliability and economy of the power system. Cable production involves conductor stranding, insulation extrusion, sheath forming, shielding layer processing and other processes. Deviation in any link may lead to hidden defects. Factory testing can verify whether the process parameters meet the standards and timely find systemic problems in the production process.

[0003] The utility model discloses a kind of power testing devices with the publication number CN220398920U, including main body, the top of the main body is fixedly installed with truncation mechanism, the truncation mechanism includes mounting plate, the top of the mounting plate is fixedly installed with fixed ring, the upper of the fixed ring is rotatably connected with movable ring by first hinged shaft, the circumferential surface of movable ring is rotatably connected with cutting blade by second hinged shaft, and the one end of the cutting blade is fixedly installed with handle.

[0004] The utility model discloses a kind of cable performance testing devices simulating vacuum environment with the publication number CN110927493A, the cable performance testing device includes: box, box is equipped with the air pump that is communicated in box, box is also equipped with pressure measuring device, and the pressure measuring probe of pressure measuring device is inserted into box;Two cable entrances are respectively arranged on the two sides of the opposite setting of box, and two cable entrances are coaxially arranged.

[0005] However, in the prior art, the test environment is mostly open or insufficiently closed, which is easily disturbed by external air, water vapor, impurities and other factors, resulting in reduced accuracy of test results. In a closed environment, it is difficult to achieve deployment and straight laying for medium and long cables of 10m-50m, affecting the convenience of test operation. SUMMARY

[0006] The purpose of the present application is to provide a power line testing device to solve the above problems and overcome the defects of the prior art, as described in detail below.

[0007] To achieve the above purpose, the present application provides the following technical solutions: The power line testing device provided by the present application includes a lower test box frame and an upper test box frame. A detection chamber with a rectangular cuboid-shaped inner profile is formed between the lower test box frame and the upper test box frame. The upper test box frame is provided with openings at both ends along the length direction of the detection chamber. Each opening is provided with an opening and closing door structure for controlling the opening and closing thereof. The lower test box frame is provided with a negative pressure suction assembly for realizing the exhaust vacuum of the detection chamber. Two cable clamping structures are arranged in the detection chamber and move along the length direction of the detection chamber, a wire wheel manual driving assembly is arranged on the outer side of the lower test box frame and is used to drive the movement of the cable clamping structure. A dial lever assembly is arranged on the upper test box frame and is used to twist and stretch the cable and to detect the bending of the cable. Two conductor resistance test structures are arranged at the two ends of the upper test box frame along the length direction of the detection chamber.

[0008] Preferably, the lower test box frame is hollow inside and is open at the upper side, a sealing insulation test table is arranged at the open upper side of the lower test box frame, a cable sliding groove is arranged at the upper side of the insulation test table, the cross-sectional shape of the cable sliding groove is V-shaped, and a plurality of support rollers are uniformly distributed and rotate in the cable sliding groove along the length direction of the cable sliding groove.

[0009] Preferably, a sealing embedded edge is arranged on the lower side of the upper test box frame along the edge of the upper test box frame, a sealing embedded groove is arranged on the upper side of the insulation test table along the edge of the insulation test table and is in sealing abutment with the sealing embedded edge, a transparent observation window is arranged on the outer wall of the upper test box frame, and a lower support is arranged at the bottom side of the lower test box frame and is used to support the lower test box frame.

[0010] Preferably, the cable clamping structure comprises a clamping sliding block, a guide sliding groove is arranged on the insulation test table and is used to cooperate with the sliding of the clamping sliding block, a guide rod is fixedly arranged in the guide sliding groove, and a guide through hole is arranged on the clamping sliding block and is used to slide through the guide rod. A wire clamping groove with a U-shaped inner side contour shape is arranged on the upper side of the clamping sliding block, a telescopic hole is arranged on each side of the wire clamping groove, a clamping block is slidably arranged in each telescopic hole, a clamping groove is arranged on one side of each clamping block opposite to each other, the inner side contour shape of the clamping groove is arc-shaped, an adjusting screw is rotatably arranged in the telescopic hole, one end of the adjusting screw penetrates through the telescopic hole and is connected with a knob, and an adjusting screw hole is arranged at one end of the clamping block in the telescopic hole and is threadedly connected with the adjusting screw.

[0011] Preferably, each cable clamping structure corresponds to two wire wheel manual driving assemblies used to drive the cable clamping structure to move back and forth, the wire wheel manual driving assembly comprises a wheel frame, a wire wheel is rotatably arranged on the wheel frame, a wire rope is wound and unwound on the wire wheel, two open grooves are arranged on the lower side of the clamping sliding block, one of the open grooves is used to pass through the wire rope, two movable pulleys are rotatably arranged in the other open groove, and the head end of the wire rope passes through the movable pulleys and is fixedly connected with the wheel frame.

[0012] As preferred, one end of the rotation axis of the wire reel is connected with one end of a rotating shaft, the other end of the rotating shaft penetrates through the lower test box frame and is connected with a rotating rod, a hand wheel is arranged on the rotating rod, a rotation damper for damping the rotation of the wire reel is arranged on the wheel frame, and an angle positioning structure for clamping the rotation of the rotating shaft is arranged on one side of the rotating shaft outside the lower test box frame.

[0013] As preferred, the angle positioning structure comprises a sliding hole formed in the inner lower end of a sliding cylinder fixed on the lower test box frame, a lifting column rotatably and slidingly arranged in the sliding hole, a clamping tooth arranged on the lower end of the lifting column, a pull rod fixedly connected with the upper end of the lifting column, the upper end of the pull rod slidingly penetrating through the top end of the sliding cylinder and being arranged in an L-shaped corner, a spring nested on the outer side of the pull rod between the upper end of the lifting column and the top surface of the sliding hole, a tooth disc arranged on the outer side of the rotating shaft and matched with the clamping tooth, and a hook arranged on the lower test box frame for hanging the pull rod.

[0014] As preferred, the dial lever assembly comprises a dial plate rotatably arranged on the upper side of the upper test box frame, a motor arranged on the outer side of the upper part of the upper test box frame, an output shaft of the motor connected with the dial plate through a speed reducer, a torque sensor arranged at the connection between the dial plate and the speed reducer, two dial levers arranged on the outer side of the dial plate and symmetrically distributed at equal angles, two reinforcing rods arranged between the two dial levers, a cross link arranged between the reinforcing rods and the dial levers, and a dial sleeve rotatably arranged on the lower end of each dial lever.

[0015] As preferred, the negative pressure suction assembly comprises a plurality of vacuum pumps uniformly distributed along the length direction of the detection chamber, the vacuum pumps are arranged on the lower side of the lower test box frame, one end of an air inlet pipe of each vacuum pump is connected with an air inlet, the other end of the air inlet pipe is in communication with the detection chamber, one end of an air outlet pipe of each vacuum pump is connected with an air outlet, and the other ends of the air outlet pipes are connected with an air guide pipeline.

[0016] As preferred, the conductor resistance test structure comprises an external connecting column arranged on the upper side of the upper test box frame, a first plug connector arranged on the external connecting column, a spring lead wire arranged in the upper test box frame, a second plug connector connected with the lower end of the spring lead wire, and the upper end of the spring lead wire penetrating through the upper test box frame and connected with the upper test box frame.

[0017] The beneficial effects are that: 1. The closed detection chamber is formed by the lower test box frame and the upper test box frame, the sealing performance is strengthened by the sealing inserts, the sealing grooves and the sealing washers, a stable vacuum environment is created by the negative pressure suction assembly, external air, water vapor and impurities are effectively isolated, and the accuracy of the test results is ensured.

[0018] 2. The line wheel manual drive assembly cooperates with the cable clamping structure to drive the cable to move in the closed chamber, realizes stable unfolding, straight laying and accurate positioning of the 10m-50m medium and long cable, and solves the problem of cable support difficulty in the closed environment.

[0019] 3. The cooperation of the dial lever assembly, the line wheel manual drive assembly and the cable clamping structure can realize the bending experiment and the stretching experiment of the cable. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0021] Figure 1 is the front view of the present application; Figure 2 is the first direction perspective view of the present application; Figure 1 Figure 3 is the partial enlarged view at A of the present application; Figure 2 Figure 4 is the second direction perspective view of the present application; Figure 1 Figure 5 is the perspective view of the dial lever assembly of the present application; Figure 6 is the perspective view of the conductor resistance test structure of the present application; Figure 7 is the perspective view of the cable clamping structure of the present application; Figure 8 is the partial enlarged view at B of the present application; Figure 7 Figure 9 is the section view of the clamping slider of the present application; Figure 10 is the section view of the line wheel manual drive assembly of the present application; Figure 11 is the perspective view of the line wheel manual drive assembly of the present application.

[0022] ​​​​The reference signs are explained as follows: 1, lower test box frame; 101, insulation test table; 102, lower support; 103, sealing groove; 104, first sealing gasket; 105, guide sliding groove; 106, cable sliding groove; 107, supporting roller; 108, guide rod; 2, upper test box frame; 201, transparent observation window; 202, sealing embedded edge; 203, opening; 204, second sealing gasket; 3, lever assembly; 301, motor; 302, speed reducer; 303, rotating disc; 304, torque sensor; 305, reinforcing rod; 306, lever; 307, cross connecting rod; 308, lever rotating sleeve; 4, negative pressure suction assembly; 401, vacuum pump; 402, exhaust pipe; 403, air guide pipeline; 5, opening and closing door structure; 501, air cylinder; 502, lifting door; 503, lifting sliding groove; 504, supporting lug; 6, conductor resistance test structure; 601, external connecting column; 602, first plug; 603, spring lead wire; 604, second plug; 7, wire wheel manual driving assembly; 701, wheel frame; 702, wire wheel; 703, rotary damper; 704, rotating shaft; 705, rotating rod; 706, toothed disc; 707, wire rope; 708, hand wheel; 709, sliding cylinder; 710, sliding hole; 711, lifting column; 712, clamping teeth; 713, spring; 714, pull rod; 715, hook; 8, digital display control panel; 9, cable clamping structure; 901, clamping sliding block; 902, opening slot; 903, movable pulley; 904, guide sliding hole; 905, wire clamping groove; 906, telescopic hole; 907, clamping block; 908, adjusting screw; 909, adjusting screw hole; 910, clamping groove; 911, knob; 10, air pressure sensor. DETAILED DESCRIPTION

[0023] The technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0024] Reference Figures 1-11As shown, the present application provides a power line testing device, which comprises a lower test box frame 1 and an upper test box frame 2, and a digital display control panel 8, the inside of the lower test box frame 1 is hollow and the upper side is open, the upper side of the lower test box frame 1 is sealingly provided with an insulation test table 101, the lower side of the insulation test table 101 is provided with a first sealing gasket 104 at the upper side of the lower test box frame 1, the upper side of the insulation test table 101 is provided with a second sealing gasket 204 at the lower side of the upper test box frame 2, the upper side of the insulation test table 101 is provided with a cable sliding groove 106 with a V-shaped cross section, which is used to guide the movement of the cable clamping structure 9 from one opening 203 to the other opening 203, preventing the cable from shifting position, a plurality of support rollers 107 are uniformly distributed in the cable sliding groove 106 and rotate along the length direction of the cable sliding groove 106, since the cable clamping structure 9 is manually adjusted by the line wheel manual driving assembly 7, the support rollers 107 can realize the rolling support of the cable during movement, reduce the friction, and manual adjustment is more labor-saving.

[0025] The lower side of the upper test box frame 2 is provided with a sealing embedded edge 202 along the edge, and the upper side of the insulation test table 101 is provided with a sealing embedded groove 103 which is sealingly matched with the sealing embedded edge 202, in actual application, the contact area is increased by the embedded structure between the sealing embedded edge 202 and the sealing embedded groove 103, and the sealing gasket is matched to further strengthen the sealing performance of the detection chamber, prevent external air, water vapor or impurities from entering, and provide a basis for creating a stable vacuum air pressure environment for the negative pressure suction assembly 4, the outer wall of the upper test box frame 2 is provided with a transparent observation window 201 made of transparent high-strength glass or acrylic, and the bottom side of the lower test box frame 1 is provided with a lower support 102 for supporting it.

[0026] In actual application, the test length of the cable is 10-50m, which can be supported and spread straight in an open test environment, and in a closed test environment, in order to facilitate the expansion and support of the cable, the external line wheel manual driving assembly 7 can drive the internal cable clamping structure 9 to move, so as to clamp the cable to spread out, and complete the support of the cable in a relatively closed adjustment.

[0027] See the description Figure 1 and Figure 4As shown, the inner side profile of the detection chamber formed between the lower test box frame 1 and the upper test box frame 2 is a cuboid shape, the upper test box frame 2 is provided with an opening 203 at each end along the length direction of the detection chamber, and each opening 203 is provided with an opening and closing door structure 5 for controlling the opening and closing thereof; specifically, the opening and closing door structure 5 includes a lifting door 502, the lifting door 502 is slidingly arranged in a lifting sliding groove 503 provided at the opening 203, and the upper side of the lifting door 502 is connected with an ear 504 respectively, and the upper test box frame 2 is fixedly provided with a pneumatic cylinder 501, the head end of the push rod of the pneumatic cylinder 501 and the ear 504 are fixedly connected with each other, and the pneumatic cylinder 501 can drive the lifting door 502 to move up and down in the lifting sliding groove 503 through the ear 504.

[0028] See the accompanying drawings Figure 1 and Figure 4 As shown, the lower test box frame 1 is provided with a negative pressure suction assembly 4 for realizing the exhaust vacuum of the detection chamber; the negative pressure suction assembly 4 includes a plurality of vacuum pumps 401 uniformly distributed along the length direction of the detection chamber, and each vacuum pump 401 is arranged on the lower side of the lower test box frame 1, the air inlet of each vacuum pump 401 is connected with one end of an air inlet pipe, the other end of the air inlet pipe is in communication with the detection chamber, and the air outlet of each vacuum pump 401 is connected with one end of an exhaust pipe 402, and the other ends of the exhaust pipes 402 are connected with each other through a gas guide pipeline 403.

[0029] In actual application, when it is necessary to create a vacuum environment for the detection chamber to ensure the accuracy of the test, each vacuum pump 401 is started. When the vacuum pump 401 works, the air in the detection chamber is extracted through the respective connected air inlet pipe, so that the inside of the detection chamber forms an exhaust vacuum state. The extracted air enters the corresponding exhaust pipe 402 through the air outlet of each vacuum pump 401, and is then concentrated and discharged to the outside of the device through the mutually connected gas guide pipeline 403, so as to realize the negative pressure environment of the detection chamber and avoid the interference of impurities, moisture and other factors on the detection result of the power test line.

[0030] See the accompanying drawings Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, two cable clamping structures 9 are arranged in the detection chamber along the length direction thereof, the cable clamping structure 9 comprises a clamping slider 901, an insulating test table 101 is provided with a guide sliding slot 105 for matching sliding of the clamping slider 901, a guide rod 108 is fixedly arranged in the guide sliding slot 105, and a guide through hole is through-provided on the clamping slider 901 for sliding through the guide rod 108; a wire clamping groove 905 with a U-shaped inner side contour shape is arranged on the upper side of the clamping slider 901, and elastic channels 906 are respectively arranged on the two sides of the wire clamping groove 905; a clamping block 907 is slidably arranged in each elastic channel 906, and a clamping groove 910 is arranged on the side of the two clamping blocks 907 opposite to each other, the inner side contour shape of the clamping groove 910 is arc-shaped, an adjusting screw 908 is rotatably arranged in the elastic channel 906, one end of the adjusting screw 908 penetrates through the elastic channel 906 and is connected with a knob 911, and an adjusting screw hole 909 is arranged at one end of the clamping block 907 in the elastic channel 906, and the adjusting screw hole 909 is threadedly connected with the adjusting screw 908. Through the above specific structure design, when the cable is clamped, the cable is placed in the U-shaped wire clamping groove 905 on the upper side of the clamping slider 901, then the knob 911 is rotated to drive the adjusting screw 908 to rotate, since the clamping block 907 is threadedly connected with the adjusting screw 908 through the adjusting screw hole 909, and the clamping block 907 is slidably arranged in the elastic channel 906, the rotation of the adjusting screw 908 drives the clamping block 907 to move in the elastic channel 906, two knobs 911 are respectively adjusted until the arc-shaped clamping grooves 910 on the two sides are tightly fitted with the surface of the cable, and the stable clamping of the cable is completed. By reversely rotating the knob 911, the clamping block 907 can be reversely moved to loosen the cable for taking, placing or position adjustment.

[0031] See the accompanying drawings Figure 7 , Figure 8 , Figure 10 and Figure 11As shown, the lower test box frame 1 is provided with a wire wheel manual drive assembly 7 outside for driving the cable clamping structure 9 to move; each cable clamping structure 9 corresponds to two wire wheel manual drive assemblies 7 for driving it to move back and forth, the wire wheel manual drive assembly 7 includes a wheel frame 701, a wire wheel 702 is rotatably arranged on the wheel frame 701, a wire rope 707 is wound and unwound on the wire wheel 702, and the lower side of the clamping sliding block 901 is provided with two open grooves 902, one of which is used to pass through the wire rope 707, and the other open groove 902 is rotatably provided with two movable pulleys 903, the head end of the wire rope 707 passes through the movable pulley 903 and is fixedly connected with the wheel frame 701. One end of the rotating shaft 704 is connected with the rotating shaft 704 of the rotating shaft 704, and the other end of the rotating shaft 704 passes through the lower test box frame 1 and is connected with the rotating rod 705, and the rotating rod 705 is provided with a hand wheel 708. The wheel frame 701 is provided with a rotary damper 703 for damping the rotation of the wire wheel 702, and the side of the rotating shaft 704 outside the lower test box frame 1 is provided with an angle positioning structure for clamping the rotation thereof. The angle positioning structure includes a sliding hole 710 opened in the lower end of the sliding cylinder 709 fixedly arranged on the lower test box frame 1, a lifting column 711 rotatably arranged in the sliding hole 710, a clamping tooth 712 arranged at the lower end of the lifting column 711, a pull rod 714 fixedly connected with the upper end of the lifting column 711, the pull rod 714 slidingly passes through the top end of the sliding cylinder 709 and is arranged in an L-shaped corner, the pull rod 714 is nested with a spring 713 between the upper end of the lifting column 711 and the top surface of the sliding hole 710, the rotating shaft 704 is provided with a tooth disc 706 matched with the clamping tooth 712, and the lower test box frame 1 is provided with a hook 715 for hanging the pull rod 714. In actual application, when the cable clamping structure 9 needs to be moved, the L-shaped pull rod 714 in the angle positioning structure is pulled up first, the spring 713 in the sliding hole 710 is compressed, the clamping tooth 712 at the lower end of the lifting column 711 is separated from the tooth disc 706 outside the rotating shaft 704, and then the pull rod 714 is hung on the hook 715 of the lower test box frame 1, and the rotation of the rotating shaft 704 is released. By rotating the hand wheel 708, the rotating rod 705 and the rotating shaft 704 are driven to rotate, and then the wire wheel 702 on the wheel frame 701 is driven to rotate. The wire rope 707 wound on the wire wheel 702 is wound and unwound when the wire wheel 702 rotates, and the clamping sliding block 901 is driven to slide along the guide rod 108 in the guide sliding groove 105 by the tension of the wire rope. Since each cable clamping structure 9 corresponds to two wire wheel manual drive assemblies 7, the back and forth directions are controlled respectively, the rotary damper 703 dampens the rotation of the wire wheel 702, and the wire rope 707 can be prevented from being tangled when the wire wheel 702 is passively rotated. When the clamping sliding block 901 moves to the target position, the pull rod 714 is removed from the hook 715, the spring 713 is reset to push the lifting column 711 to descend, the clamping tooth 712 is reconnected with the tooth disc 706, and the rotation angle of the rotating shaft 704 is locked, so that the position of the wire wheel 702 is fixed, and the clamping sliding block 901 is ensured to be stably stayed at the target position.

[0032] See the accompanying drawings Figure 2 and Figure 5 As shown in the drawings, the upper test box frame 2 is provided with a lever assembly 3 for torsional stretching and bending detection of the cable; the lever assembly 3 includes a rotating disc 303 rotatably arranged on the upper side of the upper test box frame 2, a motor 301 is arranged on the outer side of the upper part of the upper test box frame 2, the output shaft end of the motor 301 is connected with the rotating disc 303 through a speed reducer 302, a torque sensor 304 is arranged at the connection between the rotating disc 303 and the speed reducer 302, two levers 306 are symmetrically distributed at equal angles on the outer side of the rotating disc 303 along the circumferential direction thereof, two reinforcing rods 305 are arranged between the two levers 306, a cross connecting rod 307 is arranged between the reinforcing rod 305 and the lever 306, and a rotating sleeve 308 is rotatably arranged at the lower end of each lever 306. In actual application, the motor 301 drives the rotating disc 303 to rotate through the speed reducer 302, thereby driving the levers 306 on the rotating disc 303 to rotate, and the stretching and bending experiment of the cable is completed by the levers 306, wherein the reinforcing rods 305 and the cross connecting rod 307 play a role in strengthening the structure of the levers 306, so as to avoid bending deformation of the levers 306 caused by excessive stress.

[0033] See the accompanying drawings Figure 2 and Figure 6 As shown in the drawings, the upper test box frame 2 is provided with a conductor resistance test structure 6 at both ends along the length direction of the detection chamber. The conductor resistance test structure 6 includes an external column 601 arranged on the upper side of the upper test box frame 2, a first plug 602 is arranged on the external column 601, a spring wire 603 is arranged in the upper test box frame 2, a second plug 604 is connected to the lower end of the spring wire 603, and the upper end of the spring wire 603 penetrates out of the upper test box frame 2 and is connected with the upper test box frame 2.

[0034] The output end of the digital display control panel 8 is electrically connected to the input end of the motor 301, the vacuum pump 401 and the air cylinder 501, and the output end of the torque sensor 304 and the air pressure sensor 10 is electrically connected to the input end of the digital display control panel 8.

[0035] Working principle: In use, the lower test box frame 1 and the upper test box frame 2 are combined to form a power test box body, when the two opening and closing door structures 5 are both in the closed state, the detection chamber in the power test box body is in a sealed state, and the vacuum negative pressure state of the detection chamber can be realized by cooperating the negative pressure suction assembly 4 and the air pressure sensor 10 arranged in the detection chamber, so as to avoid the influence of impurities and too much humidity on the detection result. When the cable is clamped to the two cable clamping structures 9 in the detection chamber for support and erection for detection, the two cable clamping structures 9 are respectively located at the two openings 203, wherein the two cable clamping structures 9 are respectively represented by the first cable clamping structure and the second cable clamping structure, and the two openings 203 are respectively represented by the first opening and the second opening. First, the two opening and closing door structures 5 are opened, and one end of the cable is clamped to the first cable clamping structure at the first opening position. After clamping, the corresponding wire wheel manual driving assembly 7 drives the first cable clamping structure to move to the second opening while clamping the cable. At the second opening, the cable is unloaded from the first cable clamping structure and then clamped to the second cable clamping structure. After the first cable clamping structure is reset, the other end of the cable is clamped. The position of the first cable clamping structure and the second cable clamping structure is adjusted by the wire wheel manual driving assembly 7, so that the cable remains straight. Then, the position of the first cable clamping structure and the second cable clamping structure is locked by the wire wheel manual driving assembly 7. At this time, resistance detection is performed by the conductor resistance test structure 6. In actual application, a wire clamp or other conductive structure facilitating clamping can be arranged at the position of the second plug 604. The cable can also be subjected to a stretching test and a bending test by the lever assembly 3. When the cable is subjected to a stretching test, the cable remains straight, and the position of the first cable clamping structure and the second cable clamping structure is locked by the wire wheel manual driving assembly 7. Then, the motor 301 of the lever assembly 3 drives the lever 306 to apply force to the cable, so that the cable is more straight and subjected to a stretching force. The stretching force is controlled by the torque sensor 304. After the experiment, the cable is taken out, and it is observed whether the material of the insulation layer and the sheath layer is cracked.

[0036] When the cable is subjected to a bending test, the position of the first cable clamping structure and the second cable clamping structure is adjusted by the wire wheel manual driving assembly 7, so that the cable is in a relatively relaxed state but not vertical. Then, the motor 301 of the lever assembly 3 drives the lever 306 to apply force to the cable, so that the cable repeatedly bends in an S shape without being straight and tight. Thus, the bending test is performed. After the experiment, the cable is taken out, and it is observed whether the insulation layer, the sheath layer, and the conductor are cracked or broken, to ensure the reliability of the cable when it is laid and bent.

[0037] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power line testing device, characterized in that: The invention comprises a lower test box frame (1) and an upper test box frame (2), wherein a detection chamber having an inner contour in the shape of a rectangular parallelepiped is formed between the lower test box frame (1) and the upper test box frame (2), and the upper test box frame (2) is provided with openings (203) at both ends along the length direction of the detection chamber, and each opening (203) is provided with an opening and closing door structure (5) for controlling the opening and closing thereof, and the lower test box frame (1) is provided with a negative pressure suction component (4) for achieving vacuum exhaust in the detection chamber; Two cable clamping structures (9) are provided in the detection chamber for movement along its length direction, and a wire wheel manual driving assembly (7) for driving the cable clamping structures (9) is provided on the outside of the lower test box frame (1); The upper test box frame (2) is provided with a lever assembly (3) for performing torsion, stretching and bending tests on the cable; Conductor resistance test structures (6) are respectively provided at both ends of the upper test box frame (2) along the length direction of the detection chamber.

2. The power line testing device according to claim 1, characterized in that: The interior of the lower test box frame (1) is hollow and the upper side is open. An insulation test bench (101) is sealed at the upper opening of the lower test box frame (1). A cable chute (106) is provided on the upper side of the insulation test bench (101). The cross-section of the cable chute (106) is V-shaped. A plurality of evenly distributed support rollers (107) are rotatably provided in the cable chute (106) along its length.

3. The power line testing device according to claim 2, characterized in that: The lower side of the upper test box frame (2) is provided with a sealing edge (202) along its edge protrusion, and the upper side of the insulation test bench (101) is provided with a sealing groove (103) along its edge for sealingly mating with the sealing edge (202), a transparent observation window (201) is provided on the outer side wall of the upper test box frame (2), and a lower bracket (102) for supporting the lower test box frame (1) is provided on the bottom side.

4. The power line testing device according to claim 2, characterized in that: The cable clamping structure (9) includes a clamping slider (901), the insulation test bench (101) is provided with a guide slot (105) for cooperating with the clamping slider (901) to slide, a guide rod (108) is fixed in the guide slot (105), and a guide through-hole is provided on the clamping slider (901) for sliding through the guide rod (108); A clamping groove (905) with a U-shaped inner contour is provided on the upper side of the clamping slider (901), and telescopic channels (906) are provided on both sides of the clamping groove (905). A clamping block (907) is slidably provided in each telescopic channel (906), and a clamping groove (910) is provided on the side opposite to each other of the two clamping blocks (907). The inner contour of the clamping groove (910) is in the shape of an arc. An adjusting screw (908) is rotatably provided in the telescopic channel (906), and one end of the adjusting screw (908) passes through the telescopic channel (906) and is connected to a knob (911). An adjusting screw hole (909) is provided at one end of the clamping block (907) located in the telescopic channel (906) and is threadedly connected to the adjusting screw (908).

5. The power line testing device according to claim 4, characterized in that: Each of the cable clamping structures (9) corresponds to two manual pulley drive assemblies (7) for driving the cable clamping structure back and forth. The manual pulley drive assembly (7) comprises a wheel frame (701), a wheel (702) is rotatably provided on the wheel frame (701), and a wire rope (707) is wound and released on the wire rope (702). Two opening slots (902) are provided on the lower side of the clamping slider (901), one of the opening slots (902) is used to pass the wire rope (707), and two movable pulleys (903) are rotatably provided in the other opening slot (902), and the head end of the wire rope (707) passes around the movable pulley (903) and is fixedly connected to the wheel frame (701).

6. The power line testing device according to claim 5, characterized in that: The rotating shaft end of the wire wheel (702) is connected to one end of a rotating shaft (704), the other end of the rotating shaft (704) passes through the lower test box frame (1) and is connected to a rotating rod (705), the rotating rod (705) is provided with a hand wheel (708), the wheel frame (701) is provided with a rotation damper (703) for damping the rotation of the wire wheel (702), and one side of the rotating shaft (704) located outside the lower test box frame (1) is provided with an angle positioning structure for locking its rotation.

7. The power line testing device according to claim 6, characterized in that: The angle positioning structure includes a slide cylinder (709) fixedly arranged on the lower test box frame (1), the lower end of which is provided with a slide hole (710), the lower end of the slide hole (710) is provided with a lifting column (711) which is rotatably slidable, the lower end of the lifting column (711) is provided with a locking tooth (712), the upper end of the lifting column (711) is fixedly connected with a pull rod (714), the upper end of the pull rod (714) slides out of the top of the slide cylinder (709) and is provided with an L-shaped corner, a spring (713) is embedded on the outside of the pull rod (714) located between the upper end of the lifting column (711) and the top surface of the slide hole (710), a toothed disc (706) which is engaged with the locking tooth (712) is provided on the outside of the rotating shaft (704), and a hook (715) for hanging the pull rod (714) is provided on the lower test box frame (1).

8. The power line testing device according to claim 1, characterized in that: The shift lever assembly (3) comprises a turntable (303) rotatably arranged on the upper inner side of the upper test box frame (2); a motor (301) is provided on the outer side of the upper portion of the upper test box frame (2); an output shaft end of the motor (301) is connected to the turntable (303) via a reducer (302); a torque sensor (304) is provided at the connection between the turntable (303) and the reducer (302); two shift levers (306) are provided on the outer side of the turntable (303) along its circumferential direction and are symmetrically distributed at equal angles; two reinforcing rods (305) are provided between the two shift levers (306); a cross connecting rod (307) is provided between the reinforcing rods (305) and the shift levers (306); and a shifting sleeve (308) is rotatably provided at the lower end of each shift lever (306).

9. The power line testing device according to claim 1, characterized in that: The negative pressure suction component (4) includes a plurality of vacuum pumps (401) uniformly distributed along the length direction of the detection chamber. The vacuum pumps (401) are all arranged on the lower side of the lower test box frame (1). The air inlet of each vacuum pump (401) is connected to one end of an air inlet pipe, and the other end of the air inlet pipe is communicated with the detection chamber. The air outlet of each vacuum pump (401) is connected to one end of an exhaust pipe (402), and the other ends of the exhaust pipes (402) are connected to each other through an air guide pipe (403).

10. The power line testing device according to claim 1, characterized in that: The conductor resistance test structure (6) comprises an external connection column (601) arranged on the upper side of the upper test box frame (2), a first plug connector (602) being provided on the external connection column (601), a spring wire (603) being provided in the upper test box frame (2), a lower end of the spring wire (603) being connected to a second plug connector (604), and an upper end of the spring wire (603) passing through the upper test box frame (2) and being connected to the upper test box frame (2).

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