Portable cable fault range finder

Abstract

The invention discloses a portable cable fault range finder, and relates to the technical field of cable fault detection. At present, the problems of potential safety hazards and complicated operation in the use process of a cable fault range finder are solved. The cable fault detection device comprises a cable fault detection device, a transfer mechanism and a discharge mechanism, the transfer mechanism comprises a shell and a protection chamber arranged on the shell, and the discharge mechanism is arranged in the shell. According to the technical scheme, the transfer mechanism enables the data line and the extension line to be inserted into the protection cavity through the cable clamp channel, guarantees that the metal part is not exposed, and avoids the risk of electric shock. And meanwhile, the protection cavity reduces the contact between the conducting medium and the outside, and the safety is improved. After finishing operation, the worker can wear the insulating gloves and use the discharge rod to release cable charges. If charge residue needs to be prevented, the worker can continue to wear the insulating glove and pull the ground wire to drive the discharge resistor to be in contact with the conducting medium, so that the residual charge is effectively led out, and safe and convenient operation is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of cable fault detection, and in particular to a portable cable fault distance meter. Background Art

[0002] Cable fault detection is a comprehensive cable fault detection operation, which can test the cable's high-resistance flashover fault, high- and low-resistance grounding, short circuit, cable disconnection, poor contact and other faults; The equipment required for cable fault detection mainly includes cable fault distance meter, cable path and fault location meter, high and low voltage generator and other equipment. The cable fault distance meter needs to be connected to the faulty cable through a data line, and a low voltage pulse is transmitted to the cable through the generator. The length of the cable and the approximate location of the short circuit in the cable are determined according to the waveform collected on the distance meter, and the location meter is used to determine the accurate fault location, thereby completing the cable fault location work; In order to facilitate outdoor use by staff, most of the existing cable fault distance finders are portable, and their size is similar to a suitcase. Portable cable fault distance finders have the problem that the cable is located higher or deeper, the data line distance is not enough, and the cable position is relatively narrow, and the equipment cannot be placed horizontally after entering. Therefore, this problem is generally solved by adding an extension cord to the data cable. There are two ways in the operation process. One is to complete the connection between the data cable and the extension cord by clamping the wire clamps together. The metal part of the wire clamp is directly exposed to the outside, and there is a risk of electric shock. The other is to clamp the wire clamps at both ends of the connector respectively. Although this method allows the wire clamps to be stored in the connector, the conductive medium in the connector accumulates charge after testing. In order to ensure personal safety, it is also necessary to discharge to the ground, and the operation is more cumbersome. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that most of the existing cable fault distance finders are portable and similar in size to a suitcase, but there are still problems such as the cable position is high or deep, the data line distance is insufficient, the cable position is narrow, and the equipment cannot be placed horizontally after entering. Therefore, this problem is generally solved by adding an extension line to the data line. The two existing methods of adding an extension line both have certain disadvantages, and a portable cable fault distance finder is proposed.

[0004] In order to achieve the above object, the present invention adopts the following technology: a portable cable fault distance meter: The invention comprises a cable fault detection device, which comprises a rangefinder body and a data line connecting the rangefinder body and the cable, wherein the data line is connected to a long-distance cable through an extension line, and the data line and the extension line are connected through a transfer mechanism, wherein the transfer mechanism comprises a shell and a protective chamber arranged on the shell, wherein cable clamp channels for inserting the data line and the extension line are provided on both sides of the protective chamber, and a conductive medium communicating with the data line and the extension line is arranged inside the protective chamber; A discharge mechanism is arranged in the shell, and the discharge mechanism includes a connecting rod which can be raised and lowered inside the shell and a mounting frame which is arranged on the connecting rod and does not contact the conductive medium. A ground wire is connected to the connecting rod and a discharge resistor is arranged on the mounting frame. When the connecting rod descends, the discharge resistor contacts the conductive medium, and the charge accumulated in the conductive medium is conducted to the ground wire through the discharge resistor for discharge to the ground.

[0005] By setting up a transfer mechanism and a discharge mechanism, this technical solution effectively solves the safety hazards and cumbersome operation problems that exist in the use of the cable fault rangefinder. The design of the transfer mechanism and the discharge mechanism enables the data cable and the extension cable to be inserted into the protective chamber through the cable clamp channel, ensuring that under the protection of the protective chamber, the metal parts of the data cable and the extension cable will not be exposed to the external environment, thereby avoiding the risk of electric shock caused by accidental contact. In addition, the protective chamber can reduce the contact between the conductive medium and the outside world, further improving safety. After completing the operation of the rangefinder body, the staff can wear insulating gloves and use a discharge rod to release the charge on the cable. In order to avoid residual charge on the data cable, extension cable and conductive medium, the staff can continue to wear insulating gloves, pull the ground wire, drive the mounting frame through the connecting rod, and make the discharge resistor contact with the conductive medium, thereby effectively exporting the residual charge on the conductive medium, achieving a separate grounding discharge of the conductive medium, and ensuring the safety and convenience of the entire operation process.

[0006] As a further description of the above technology a portable cable fault distance meter: The discharge mechanism also includes an adjustment knob rotatably embedded in the housing and a latch member disposed on the adjustment knob, and a connecting rod passes through the middle of the adjustment knob and is fixed by the latch member; The latch member includes a receiving cavity arranged in the adjusting knob and an insulating plug penetrating the middle of the receiving cavity. A first sliding groove is provided on the inner wall of the receiving cavity. A slidable damping block is interference-fitted in the first sliding groove. The damping block is connected to the insulating plug. A socket that cooperates with the insulating plug is provided on the surface of the connecting rod.

[0007] As a further description of the above technology a portable cable fault distance meter: A cavity is provided at the bottom of the shell, and a fastening mechanism is arranged in the cavity. The fastening mechanism includes an active cavity slidably arranged in the cavity and penetrated by a connecting rod at the top, and an air cavity arranged in the active cavity. A push rod is penetrated through the top of the air cavity and is connected to a piston arranged inside the air cavity. A suction cup connected to the air cavity is arranged at the bottom of the air cavity, and the active cavity can slide on the surface of the connecting rod to fit the ground.

[0008] As a further description of the above technology a portable cable fault distance meter: The push rod is movably embedded in the connecting rod; A reserved groove is provided in the middle of the connecting rod, and a damping strip is provided on the inner wall of the reserved groove, and a second sliding groove which can be slidably nested on the damping strip is provided on the top of the push rod; The movable cavity is provided with an adjusting member for adjusting the height of the push rod. When the connecting rod is locked by the latch member, the push rod does not drive the connecting rod to move. When the latch member is unlocked, the sliding of the push rod drives the connecting rod to move synchronously.

[0009] As a further description of the above technology a portable cable fault distance meter: The adjusting member comprises a bracket arranged on the movable cavity, an adjusting wheel is rotatably arranged on the bracket, an extension rod is connected to one side of the adjusting wheel, a vertical through groove guide groove is opened at the surface of the connecting rod corresponding to the position of the extension rod, the extension rod passes through the guide groove and a knob is rotatably arranged at the end; The push rod is provided with a rack meshing with the adjusting wheel. When the knob is rotated, the rack drives the push rod to rise and fall so as to extract or release the air in the suction cup.

[0010] As a further description of the above technology a portable cable fault distance meter: An energy storage reel is sleeved at the rotation connection between the bracket and the adjusting wheel, and the two ends of the energy storage reel are respectively connected to the bracket and the adjusting wheel; A sliding ring is slidably arranged inside the guide groove, the sliding ring is sleeved on the surface of the rotating knob and a locking piece is arranged on the sliding ring for fixing the rotating knob so that it cannot be reversed.

[0011] As a further description of the above technology a portable cable fault distance meter: The locking member comprises an adjusting cavity provided on the inner wall of the sliding ring, a first rotating shaft is arranged in the adjusting cavity, a buckle is sleeved on the surface of the first rotating shaft, a second torsion spring is wound around the surface of the first rotating shaft, and two ends of the second torsion spring are respectively connected to the buckle and the first rotating shaft; A pick is provided at the end of the buckle, and the pick passes through the outer wall of the sliding ring; The outer wall of the knob is equidistantly provided with a plurality of second slots, one side of the second slot is vertical and the other side is inclined, the buckle can be inserted into the second slot and fit with the vertical side, and the buckle can be rotated and disengaged from the second slot by pressing the paddle.

[0012] As a further description of the above technology a portable cable fault distance meter: The outer wall of the movable cavity is provided with a plurality of first slots, and a limiting mechanism is provided at the bottom of the shell corresponding to the position of the first slot. The limiting mechanism includes a rotating groove provided on the shell and a positioning shaft arranged at the axial position of the rotating groove. A rotating piece is rotatably provided on the surface of the positioning shaft, and the rotating piece can be rotatably embedded in the first slot to fix the movable cavity.

[0013] As a further description of the above technology a portable cable fault distance meter: The bottom of the shell is rotatably provided with three supporting legs, which are distributed in a triangle when unfolded.

[0014] As a further description of the above technology a portable cable fault distance meter: The three legs are controlled to rotate by a lifting mechanism, which includes a mounting cavity provided in the housing and below the adjusting knob and an active conical wheel provided on the adjusting knob, wherein a through hole for a connecting rod to pass through is provided in the middle of the active conical wheel; The three legs are provided with a second rotating shaft penetrating into the installation cavity, and a driven conical wheel is sleeved and installed on the second rotating shaft. The three driven conical wheels are meshed with the driving conical wheel at the same time.

[0015] In summary, due to the use of the above-mentioned technology, the portable cable fault distance meter of the present invention has the following beneficial effects: 1. By setting up a transfer mechanism and a discharge mechanism, this technical solution effectively solves the safety hazards and cumbersome operation problems that exist in the use of the cable fault rangefinder. The design of the transfer mechanism and the discharge mechanism enables the data cable and the extension cable to be inserted into the protective chamber through the cable clamp channel, ensuring that under the protection of the protective chamber, the metal parts of the data cable and the extension cable will not be exposed to the external environment, thereby avoiding the risk of electric shock caused by accidental contact. In addition, the protective chamber can reduce the contact between the conductive medium and the outside world, further improving safety. After completing the operation of the rangefinder body, the staff can wear insulating gloves and use a discharge rod to release the charge on the cable. In order to avoid residual charge on the data cable, extension cable and conductive medium, the staff can continue to wear insulating gloves, pull the ground wire, drive the mounting frame through the connecting rod, and make the discharge resistor contact with the conductive medium, thereby effectively exporting the residual charge on the conductive medium, achieving a separate grounding discharge of the conductive medium, and ensuring the safety and convenience of the entire operation process.

[0016] 2. Through the fastening mechanism, when the shell is placed on the ground, the movable chamber can be taken out from the cavity at the bottom of the shell. At this time, the restriction of the latch on the connecting rod cannot be released to avoid the movement of the connecting rod. When the movable chamber drives the suction cup to fit the ground, the push rod is pulled to make the push rod drive the piston to move inside the air cavity. When the piston moves upward, the pressure in the air cavity decreases. Under the action of atmospheric pressure, the air in the suction cup is drawn into the air cavity, thereby forming a vacuum between the ground and the suction cup. Since the air pressure inside the suction cup is lower than the external air pressure, the atmospheric pressure will press the suction cup tightly against the ground, thereby increasing the friction between the ground and the suction cup, thereby avoiding the shell from generating a magnetic field around it and exerting a force on the surrounding objects when it is powered on. Since other electrical equipment is also required for the coordinated use during power maintenance, when other electrical equipment with a magnetic field is close to the shell, the shell may lose balance and tip over due to the interaction of the magnetic fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a three-dimensional structural schematic diagram of a portable cable fault distance meter.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the transfer mechanism of the present invention in the storage state.

[0019] Figure 3 It is a front view cross-sectional structural schematic diagram of the transfer mechanism of the present invention in a use state.

[0020] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0021] Figure 5 It is a schematic diagram of a partial three-dimensional cross-sectional structure in which a connecting line and an extension line of the present invention are connected via a conductive medium.

[0022] Figure 6 It is a partial three-dimensional structural schematic diagram of the discharge mechanism of the present invention.

[0023] Figure 7 It is a partial front view cross-sectional structural schematic diagram of the discharge mechanism of the present invention in contact with a conductive medium for discharge.

[0024] Figure 8 It is a partial front view cross-sectional structural schematic diagram of the latch member of the present invention fixing the discharge mechanism so that it cannot contact with the conductive medium.

[0025] Fig. 9 It is a partial front view cross-sectional structural schematic diagram of the connection state of the discharge mechanism and the fastening mechanism of the present invention.

[0026] Fig.10 It is a three-dimensional structural schematic diagram of the fastening mechanism of the present invention.

[0027] Fig.11 It is a front view cross-sectional structural schematic diagram of the adjusting member of the present invention in a use state.

[0028] Fig.12 yes Fig.11 Schematic diagram of the enlarged structure at point B in the middle.

[0029] Fig.13 yes Fig.12 Schematic diagram of the enlarged structure at point C in the middle.

[0030] Fig.14 It is a three-dimensional structural schematic diagram of the push rod, air cavity and suction cup of the present invention.

[0031] Fig.15 It is a schematic diagram of the top structure of the fastening mechanism of the present invention.

[0032] Fig.16 yes Fig.15 Schematic diagram of the enlarged structure at D in the middle.

[0033] Fig.17 It is a schematic diagram of the top cross-sectional structure of the lifting mechanism of the present invention.

[0034] Fig.18 It is a three-dimensional structural schematic diagram of the lifting mechanism of the present invention connected with the adjusting knob and the supporting feet.

[0035] Legend: 10. Cable fault detection equipment; 11. Distance meter body; 12. Data cable; 13. Extension cable; 20. Transfer mechanism; 21. Shell; 22. Support feet; 23. Protective chamber; 24. Cable clamp channel; 25. Conductive medium; 30. Discharge mechanism; 31. Connecting rod; 311. Reserved slot; 312. Damping strip; 32. Ground wire; 33. Mounting frame; 34. Discharge resistor; 35. Adjustment knob; 36, latch; 361, accommodating cavity; 362, first slide groove; 363, damping block; 364, insulating plug; 365, plug hole; 40. fastening mechanism; 41. movable cavity; 411. first slot; 42. push rod; 421. second slide slot; 422. rack; 43. piston; 44. air cavity; 45. suction cup; 46. ​​Adjustment member; 461. Bracket; 462. Adjustment wheel; 463. Extension rod; 464. Turning knob; 465. Energy storage reel; 47. Guide groove; 48. Sliding ring; 49, locking member; 491, adjusting chamber; 492, first rotating shaft; 493, buckle; 494, paddle; 495, second torsion spring; 496, second slot; 50. Limiting mechanism; 51. Rotating groove; 52. Positioning shaft; 53. Rotating sheet; 60. Lifting mechanism; 61. Mounting cavity; 62. Active conical wheel; 63. Second rotating shaft; 64. Driven conical wheel. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technology in the embodiments of the present invention, a portable cable fault distance meter. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In order to solve the problem that most of the existing cable fault distance meters are portable and similar in size to a suitcase, but there are still problems such as the cable position is high or deep, the data line distance is not enough, and the cable position is narrow, and the equipment cannot be placed horizontally after entering. Therefore, this problem is generally solved by adding an extension line to the data line. The two existing methods of adding extension lines have certain disadvantages. The present invention proposes a portable cable fault distance meter, such as Figure 1 - Fig.18 As shown: The invention comprises a cable fault detection device 10, which comprises a rangefinder body 11 and a data line 12 connecting the rangefinder body 11 and the cable, wherein the data line 12 is connected to a long-distance cable by connecting an extension line 13, and the data line 12 and the extension line 13 are connected by a transfer mechanism 20, wherein the transfer mechanism 20 comprises a shell 21 and a protective chamber 23 arranged on the shell 21, and cable clamp channels 24 for inserting the data line 12 and the extension line 13 are provided on both sides of the protective chamber 23, and a conductive medium 25 connected to the data line 12 and the extension line 13 is arranged inside.

[0038] When the cable is too high or too deep, the data line is not far enough, or the cable is too narrow to allow the device to be placed horizontally, Figure 5 As shown, the staff can insert the data line 12 and the extension line 13 into the protective chamber 23 through the cable clamp channel 24, clamp the data line 12 and the extension line 13 on the conductive medium 25 to connect them, and then connect the other ends to the cable and the rangefinder body 11 respectively. The connection between the equipment and the cable is completed. Under the protection of the protective chamber 23, the metal parts of the data line 12 and the extension line 13 will not be directly exposed to the outside world, avoiding electric shock caused by accidental contact with the data line 12 and the extension line 13. Under the protection of the protective chamber 23, the conductive medium 25 can also reduce contact with the outside world, prevent accidental contact, avoid moisture, and slow down the rust and loss of the conductive medium 25.

[0039] A discharge mechanism 30 is provided in the housing 21. Figure 3 , Figure 4 and Figure 6 As shown, the discharge mechanism 30 includes a connecting rod 31 which is arranged inside the shell 21 and can be raised and lowered, and a mounting frame 33 which is arranged on the connecting rod 31 and does not contact the conductive medium 25. A ground wire 32 is connected to the connecting rod 31, and a discharge resistor 34 is arranged on the mounting frame 33. The outer wall of the shell 21 provides the ground wire 32 with the moving space required for descending by opening a straight slot hole. When the connecting rod 31 descends, the discharge resistor 34 contacts the conductive medium 25, and the charge accumulated in the conductive medium 25 is conducted to the ground wire 32 through the discharge resistor 34 for discharge to the ground.

[0040] Before connecting with the cable and the rangefinder body 11, the ground wire 32 needs to be connected to the electrical grounding braid or the ground. After the rangefinder body 11 is used, the staff will wear insulating gloves and use a discharge rod to discharge the charge on the cable. At this time, in order to avoid residual charge on the data cable 12, the extension cable 13 and the conductive medium 25, the staff can continue to wear insulating gloves and pull the ground wire 32, so that the ground wire 32 can drive the connecting rod 31 to descend inside the shell 21, and the connecting rod 31 drives the discharge resistor 34 to contact the conductive medium 25 through the mounting bracket 33. At this time, a small amount of charge on the conductive medium 25 can be discharged through the ground wire 32, thereby achieving the purpose of grounding and discharging the conductive medium 25 separately.

[0041] In order to avoid the problem that the discharge resistor 34 drops by itself under the action of gravity and contacts with the conductive medium 25 which is being energized, causing the detection data to fluctuate, as shown in FIG. Figure 4 and Figure 8 As shown, the discharge mechanism 30 also includes an adjustment knob 35 rotatably embedded in the housing 21 and a latch 36 disposed on the adjustment knob 35 . The connecting rod 31 passes through the middle of the adjustment knob 35 and is fixed by the latch 36 .

[0042] The latch member 36 includes a receiving cavity 361 arranged in the adjusting knob 35 and an insulating pin 364 passing through the middle of the receiving cavity 361. A first sliding groove 362 is provided on the inner wall of the receiving cavity 361. A slidable damping block 363 is interference-fitted in the first sliding groove 362. The damping block 363 is connected to the insulating pin 364. A socket 365 cooperating with the insulating pin 364 is provided on the surface of the connecting rod 31.

[0043] When it is necessary to adjust the position of the connecting rod 31 so that the discharge resistor 34 contacts the conductive medium 25, the insulating pin 364 is pulled so that the insulating pin 364 drives the damping block 363 to slide under the restriction of the first slide groove 362, and the insulating pin 364 moves out from the inside of the socket 365. At this time, the restriction of the insulating pin 364 on the position of the connecting rod 31 is released, and the position of the connecting rod 31 can be adjusted.

[0044] When the housing 21 is powered on, a magnetic field is generated around it and exerts force on surrounding objects. Since other electrical equipment is required for power maintenance, when other electrical equipment with a magnetic field is close to the housing 21, the interaction of the magnetic fields may cause the housing 21 to lose balance and fall over. In order to avoid this problem, Fig. 9 , Fig.11 and Fig.14 As shown, a cavity is opened at the bottom of the shell 21, and a fastening mechanism 40 is arranged in the cavity. The fastening mechanism 40 includes an active cavity 41 which is slidably arranged in the cavity and the top of which is penetrated by the connecting rod 31, and an air cavity 44 arranged in the active cavity 41. A push rod 42 is penetrated through the top of the air cavity 44 and the push rod 42 is connected to a piston 43 arranged inside the air cavity 44. A suction cup 45 which is connected to the air cavity 44 is arranged at the bottom of the air cavity 44. The active cavity 41 can slide on the surface of the connecting rod 31 to fit with the ground.

[0045] When the shell 21 is placed on the ground, the active chamber 41 can be taken out from the cavity at the bottom of the shell 21. At this time, the restriction of the latch 36 on the connecting rod 31 cannot be released to prevent the connecting rod 31 from moving. After the active chamber 41 drives the suction cup 45 to fit the ground, the push rod 42 is pulled to make the push rod 42 drive the piston 43 to move inside the air chamber 44. When the piston 43 moves upward, the pressure in the air chamber 44 decreases, and the air in the suction cup 45 is sucked into the air chamber 44 under the action of atmospheric pressure, thereby the ground and the suction cup 45 are in contact with each other. 5, and since the air pressure inside the suction cup 45 is lower than the external air pressure, the atmospheric pressure will press the suction cup 45 tightly against the ground, thereby increasing the friction between the ground and the suction cup 45, making it difficult for the suction cup 45 to move, thereby achieving the purpose of fixing the position of the shell 21 so that it cannot be tipped over. When it is necessary to release the fixation of the suction cup 45, the piston 43 is pushed downward to push the air in the air cavity 44 back into the suction cup 45, thereby releasing the adsorption effect of the suction cup 45 on the ground, and the shell 21 can be removed from the ground.

[0046] In actual use, the piston 43 can be lowered to drive the connecting rod 31 to move together. The staff can choose to drive the connecting rod 31 to move down without pulling the ground wire 32, such as Fig. 9 As shown, the push rod 42 is movably embedded in the connecting rod 31.

[0047] A reserved groove 311 is provided in the middle of the connecting rod 31 , and a damping strip 312 is provided on the inner wall of the reserved groove 311 . A second sliding groove 421 slidably nested in the damping strip 312 is provided on the top of the push rod 42 .

[0048] The movable chamber 41 is provided with an adjusting member 46 for adjusting the height of the push rod 42. When the connecting rod 31 is locked by the latch member 36, the descent of the push rod 42 will not pull the connecting rod 31 down together. The push rod 42 drives the second slide groove 421 to slide in the damping strip 312. Therefore, the position of the connecting rod 31 will not be changed during the process of adjusting the position of the movable chamber 41 to make the suction cup 45 fit the ground.

[0049] When the suction cup 45 is fixed, it is necessary to first release the lock of the latch 36 on the connecting rod 31. At this time, in the process of releasing the adsorption of the suction cup 45, the push rod 42 will drive the piston 43 to descend and drive the second slide groove 421 to move in the reserved groove 311. At this time, the second slide groove 421 can pull the damping strip 312 under the action of the sliding friction force, thereby driving the connecting rod 31 to descend, so that the discharge resistor 34 is in contact with the conductive medium 25.

[0050] Among them, Fig.10 As shown, the adjusting member 46 includes a bracket 461 arranged on the movable cavity 41, an adjusting wheel 462 is rotatably arranged on the bracket 461, an extension rod 463 is connected to one side of the adjusting wheel 462, a vertical through groove guide groove 47 is opened at the surface of the connecting rod 31 corresponding to the position of the extension rod 463, the extension rod 463 passes through the guide groove 47 and a knob 464 is rotatably arranged at the end.

[0051] The push rod 42 is provided with a rack 422 that meshes with the adjusting wheel 462. A through hole groove for the adjusting wheel 462 to rotate is opened on the side of the reserved groove 311 close to the adjusting wheel 462. By turning the knob 464, the knob 464 drives the adjusting wheel 462 to rotate under the restriction of the bracket 461 through the extension rod 463. The adjusting wheel 462 cooperates with the rack 422 to drive the push rod 42 to rise and fall to extract or release the air in the suction cup 45. It should be noted that while driving the push rod 42 to rise, the latch 36 is not released to fix the connecting rod 31. Therefore, the push rod 42 only moves inside the reserved groove 311 and does not push the connecting rod 31 to rise.

[0052] In order to make the push rod 42 automatically descend, so as to pull the connecting rod 31 to drive the discharge resistor 34 to contact the conductive medium 25 and release the air in the suction cup 45, as shown in FIG. Fig. 9 As shown, an energy storage winding piece 465 is sleeved on the rotation connection between the bracket 461 and the adjusting wheel 462, and two ends of the energy storage winding piece 465 are respectively connected to the bracket 461 and the adjusting wheel 462.

[0053] A sliding ring 48 is slidably disposed inside the guide groove 47. The sliding ring 48 is sleeved on the surface of the knob 464 and a locking member 49 is disposed on the sliding ring 48 for fixing the knob 464 so that it cannot be reversed. Figure 11-13As shown, the locking member 49 includes an adjusting cavity 491 opened on the inner wall of the sliding ring 48, a first rotating shaft 492 is arranged in the adjusting cavity 491 and a buckle 493 is sleeved on the surface of the first rotating shaft 492, a second torsion spring 495 is wound around the surface of the first rotating shaft 492, and two ends of the second torsion spring 495 are respectively connected to the buckle 493 and the first rotating shaft 492.

[0054] A paddle 494 is disposed at the end of the buckle 493 , and the paddle 494 passes through the outer wall of the sliding ring 48 .

[0055] A plurality of second slots 496 are equidistantly formed around the outer wall of the knob 464 . One side of the second slot 496 is vertical, and the other side is inclined. The buckle 493 can be inserted into the second slot 496 and fit with the vertical side. Pressing the paddle 494 allows the buckle 493 to rotate and disengage from the second slot 496 .

[0056] During the process of moving the movable chamber 41 out of the housing 21, the extension rod 463 can drive the sliding ring 48 to move under the restriction of the guide groove 47. After reaching the appropriate position, the knob 464 is rotated to make the knob 464 drive the extension rod 463 to rotate and pull the energy storage reel 465. The energy storage reel 465 can rotate accordingly to store energy. During the rotation of the knob 464, the second slot 496 provided on the knob 464 will also contact the buckle 493. Under the push of the inclined surface of the second slot 496, the buckle 493 is The second torsion spring 495 is rotated and pulled with the first rotating shaft 492 as the axis to cause elastic deformation. With the cooperation of the second torsion spring 495, the buckle 493 can be moved out of one second slot 496 and quickly inserted into the next second slot 496. When the rotation of the knob 464 stops, the energy storage roll 465 drives the knob 464 to reverse. At this time, the vertical surface of the second slot 496 contacts the buckle 493, and the buckle 493 cannot be moved out of the second slot 496, so as to achieve the effect of fixing the knob 464.

[0057] When it is necessary to make the discharge resistor 34 contact with the conductive medium 25 for discharge and release the suction cup 45 from the ground, it is necessary to first release the restriction of the latch 36 on the connecting rod 31, so that the rise of the push rod 42 can drive the connecting rod 31 to rise together. At this time, by pressing the paddle 494, the paddle 494 drives the buckle 493 to actively rotate out of the second slot 496 and make it unable to reset. The energy storage reel 465 can reverse and release energy, thereby driving the extension rod 463 to rotate automatically and drive the adjustment member 46 to reverse. The adjustment member 46 can cooperate with the rack 422 to drive the push rod 42 to descend, so as to pull the connecting rod 31 to move and push the piston 43 at the same time. The discharge resistor 34 contacts with the conductive medium 25 for discharge and the suction cup 45 is released from the ground.

[0058] The outer wall of the active cavity 41 is provided with a plurality of first slots 411, and a limiting mechanism 50 is provided at the bottom of the housing 21 at positions corresponding to the first slots 411. When the active cavity 41 is received in the housing 21, it can be fixed by the limiting mechanism 50. Fig.10 , Fig.15 and Fig.16 As shown, the limiting mechanism 50 includes a rotating groove 51 opened on the shell 21 and a positioning shaft 52 arranged at the axial position of the rotating groove 51. A rotating piece 53 is rotatably arranged on the surface of the positioning shaft 52. The rotating piece 53 can be rotatably embedded in the first card slot 411 to fix the active cavity 41. When the active cavity 41 needs to be moved out of the shell 21, the rotating piece 53 is rotated to make it rotate out of the first card slot 411. After the active cavity 41 is adjusted to a suitable position, the position of the active cavity 41 can also be fixed by rotating the rotating piece 53 to make it embedded in other first card slots 411.

[0059] In order to further improve the stability of the housing 21 when placed, Figure 1 As shown, the bottom of the housing 21 is rotatably provided with three legs 22, which are distributed in a triangle after being unfolded. At the same time, in order to adjust the unfolding angle of the legs 22, the three legs 22 are controlled to rotate by a lifting mechanism 60, as shown in FIG. Figure 4 , Fig.17 and Fig.18 As shown, the lifting mechanism 60 includes a mounting cavity 61 opened in the housing 21 and located below the adjusting knob 35 and an active conical wheel 62 arranged on the adjusting knob 35. A through hole is opened in the middle of the active conical wheel 62 for the connecting rod 31 to pass through.

[0060] The three legs 22 are provided with a second rotating shaft 63 penetrating into the installation cavity 61 , and a driven conical wheel 64 is sleeved and installed on the second rotating shaft 63 . The three driven conical wheels 64 are meshed with the driving conical wheel 62 at the same time.

[0061] Before rotating the adjusting knob 35, it is necessary to first release the restriction of the latch 36 on the connecting rod 31. At this time, the adjusting knob 35 can drive the latch 36 to rotate inside the housing 21. A countersunk hole is provided on the surface of the adjusting knob 35. The insulating pin 364 removed from the socket 365 will not extend out of the countersunk hole, and thus will not affect the rotation of the adjusting knob 35. At this time, by rotating the adjusting knob 35, the adjusting knob 35 drives the active conical wheel 62 to rotate in the mounting cavity 61 and drives the other driven conical wheels 64 to rotate. The driven conical wheel 64 drives the support leg 22 to rotate through the second rotating shaft 63. The angles of the three support legs 22 can be adjusted synchronously so that the support legs 22 can remain stable when placed on the ground.

[0062] When the equipment is idle, the support leg 22 needs to be rotated to a vertical state to avoid breakage or bending due to external force. At this time, under the positioning of the driven conical wheel 64 and the active conical wheel 62, the adjustment knob 35 can drive the latch 36 to reset to the initial position. At the initial position, the insulating pin 364 can be normally inserted into the socket 365 to restrict the connecting rod 31.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes to a portable cable fault distance meter and its inventive concept according to the technology of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A portable cable fault distance meter, comprising a cable fault detection device (10), the cable fault detection device (10) comprising a distance meter body (11) and a data line (12) connecting the distance meter body (11) and the cable, the data line (12) being connected to a long-distance cable via a connecting extension line (13), characterized in that: The data line (12) and the extension line (13) are connected via a transfer mechanism (20), the transfer mechanism (20) comprising a housing (21) and a protective chamber (23) arranged on the housing (21), the protective chamber (23) having cable clamp channels (24) for inserting the data line (12) and the extension line (13) on both sides, and a conductive medium (25) communicating with the data line (12) and the extension line (13) arranged inside; A discharge mechanism (30) is arranged in the housing (21), and the discharge mechanism (30) comprises a connecting rod (31) arranged inside the housing (21) and capable of being raised and lowered, and a mounting frame (33) arranged on the connecting rod (31) and not in contact with the conductive medium (25). The connecting rod (31) is connected to a ground wire (32), and a discharge resistor (34) is arranged on the mounting frame (33). When the connecting rod (31) descends, the discharge resistor (34) contacts the conductive medium (25), and the charge accumulated in the conductive medium (25) is conducted to the ground wire (32) through the discharge resistor (34) to be discharged to the ground.

2. A portable cable fault distance meter according to claim 1, characterized in that: The discharge mechanism (30) further comprises an adjusting knob (35) rotatably embedded in the housing (21) and a latch (36) disposed on the adjusting knob (35); the connecting rod (31) passes through the middle of the adjusting knob (35) and is fixed by the latch (36); The latch member (36) comprises a receiving cavity (361) arranged in the adjusting knob (35) and an insulating plug (364) penetrating the middle of the receiving cavity (361); a first sliding groove (362) is provided on the inner wall of the receiving cavity (361); a slidable damping block (363) is interference-fitted in the first sliding groove (362); the damping block (363) is connected to the insulating plug (364); and a plug hole (365) cooperating with the insulating plug (364) is provided on the surface of the connecting rod (31).

3. A portable cable fault distance meter according to claim 2, characterized in that: The shell (21) has a cavity at the bottom, and a fastening mechanism (40) is arranged in the cavity. The fastening mechanism (40) comprises an active cavity (41) slidably arranged in the cavity and having a connecting rod (31) passing through the top, and an air cavity (44) arranged in the active cavity (41). A push rod (42) is arranged through the top of the air cavity (44) and is connected to a piston (43) arranged inside the air cavity (44). A suction cup (45) connected to the air cavity (44) is arranged at the bottom of the air cavity (44). The active cavity (41) can slide on the surface of the connecting rod (31) to fit the ground.

4. A portable cable fault distance meter according to claim 3, characterized in that: The push rod (42) is movably embedded in the connecting rod (31); A reserved groove (311) is provided in the middle of the connecting rod (31), and a damping strip (312) is provided on the inner wall of the reserved groove (311); a second sliding groove (421) is provided on the top of the push rod (42) and is slidably nested in the damping strip (312); The movable cavity (41) is provided with an adjusting member (46) for adjusting the height of the push rod (42); when the connecting rod (31) is locked by the latch member (36), the push rod (42) does not drive the connecting rod (31) to move; when the latch member (36) is unlocked, the sliding of the push rod (42) drives the connecting rod (31) to move synchronously.

5. A portable cable fault distance meter according to claim 4, characterized in that: The adjusting member (46) comprises a bracket (461) arranged on the movable cavity (41), an adjusting wheel (462) being rotatably arranged on the bracket (461), an extension rod (463) being connected to one side of the adjusting wheel (462), a vertical through-groove guide groove (47) being provided on the surface of the connecting rod (31) at a position corresponding to the position of the extension rod (463), the extension rod (463) passing through the guide groove (47) and a rotary knob (464) being rotatably arranged at the end thereof; The push rod (42) is provided with a rack (422) meshing with the regulating wheel (462). When the knob (464) is rotated, the rack (422) drives the push rod (42) to rise and fall so as to extract or release the air in the suction cup (45).

6. A portable cable fault distance meter according to claim 5, characterized in that: An energy storage reel (465) is sleeved on the rotation connection between the bracket (461) and the regulating wheel (462), and two ends of the energy storage reel (465) are respectively connected to the bracket (461) and the regulating wheel (462); A sliding ring (48) is slidably disposed inside the guide groove (47), the sliding ring (48) is sleeved on the surface of the rotating knob (464), and a locking member (49) is disposed on the sliding ring (48) for fixing the rotating knob (464) so ​​that it cannot be reversed.

7. A portable cable fault distance meter according to claim 6, characterized in that: The locking member (49) comprises an adjusting cavity (491) formed on the inner wall of the sliding ring (48), a first rotating shaft (492) being arranged in the adjusting cavity (491), a buckle (493) being sleeved on the surface of the first rotating shaft (492), a second torsion spring (495) being wound around the surface of the first rotating shaft (492), and two ends of the second torsion spring (495) being respectively connected to the buckle (493) and the first rotating shaft (492); A paddle (494) is provided at the end of the buckle (493), and the paddle (494) penetrates the outer wall of the sliding ring (48); The outer wall of the knob (464) is equidistantly provided with a plurality of second slots (496), one side of the second slot (496) being vertical and the other side being inclined, the buckle (493) being able to be inserted into the second slot (496) and fit with the vertical side, and the buckle (493) being able to be rotated and disengaged from the second slot (496) by pressing the paddle (494).

8. A portable cable fault distance meter according to claim 3, characterized in that: The outer wall of the movable cavity (41) is provided with a plurality of first slots (411); a limiting mechanism (50) is provided at a position corresponding to the position of the first slots (411) at the bottom of the housing (21); the limiting mechanism (50) comprises a rotating slot (51) provided on the housing (21) and a positioning shaft (52) provided at the axis position of the rotating slot (51); a rotating piece (53) is rotatably provided on the surface of the positioning shaft (52); and the rotating piece (53) can be rotatably embedded in the first slot (411) to fix the movable cavity (41).

9. A portable cable fault distance meter according to claim 1, characterized in that: The bottom of the housing (21) is rotatably provided with three supporting legs (22), which are distributed in a triangle when unfolded.

10. A portable cable fault distance meter according to claim 9, characterized in that: The three legs (22) are controlled to rotate by a lifting mechanism (60), the lifting mechanism (60) comprising a mounting cavity (61) provided in the housing (21) and located below the adjusting knob (35), and an active conical wheel (62) provided on the adjusting knob (35), wherein a through hole for the connecting rod (31) to pass through is provided in the middle of the active conical wheel (62); The three supporting legs (22) are mounted with a second rotating shaft (63) penetrating into the interior of the mounting cavity (61), and a driven conical wheel (64) is sleeved and mounted on the second rotating shaft (63). The three driven conical wheels (64) are simultaneously meshed with the driving conical wheel (62).

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