A Rogowski coil electric energy meter and its limiting mechanism

Abstract

The present invention relates to the technical field of detection equipment, and discloses a Rogowski coil electric energy meter and a limiting mechanism thereof. The limiting mechanism of the Rogowski coil electric energy meter comprises a driving base, a puncture sensor is arranged in the middle of the driving base, a limiting ring for fixing a cable to be tested is arranged on the upper end surface of the driving base, the limiting ring is arranged in a "C" shape, a winding mechanism is rotatably embedded in the inner wall of the limiting ring, the puncture sensor penetrates the limiting ring and extends to the inside of the limiting ring, and the winding mechanism is provided with a closing mechanism wound around the surface of the cable to be tested. The device can further improve the fixing effect of the puncture sensor, avoid fixed detachment, and can automatically close the damaged part after puncture, thereby improving the convenience of using the device.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment, and in particular to a Rogowski coil electric energy meter and a limiting mechanism thereof. Background Art

[0002] Rogowski coil is an AC current sensor, a hollow ring-shaped coil, available in flexible and rigid types. It can be directly put on the conductor to measure AC current. Rogowski coil is suitable for measuring AC current in a wide frequency range. It has no special requirements for conductors and sizes. It has a fast instantaneous response capability and is widely used in situations where traditional current measurement devices such as current transformers cannot be used. It is used for current measurement, especially high-frequency and large current measurement.

[0003] Chinese patent publication number CN220399525U discloses a detachable Rogowski coil puncture sensor, including a Rogowski coil assembly, a puncture sensor and a cable signal line. The bottom of the Rogowski coil assembly and the puncture sensor are respectively connected to the cable signal line, and corresponding detachable connection structures are arranged on the Rogowski coil assembly and the puncture sensor. Relative to the detachable connection arrangement, a puncture nut structure with a puncture probe and an adjustment nut structure with a C-shaped adjustment block are arranged at the bottom of the puncture sensor. The Rogowski coil sensor includes a flexible coil and a mounting seat. One end of the flexible coil is fixed on the mounting seat. A locking structure is also arranged on the mounting seat to control and lock the other end of the flexible coil to work in a ring shape. The detachable Rogowski coil puncture sensor has a simple structure and a scientific design. By arranging a quick-release Rogowski coil and adjusting and elastic puncture puncture coordination, it is not only convenient to disassemble and use, but also can be matched according to needs to make the power detection more accurate and the function more powerful.

[0004] During use, the existing Rogowski coil sensor, especially the puncture sensor, has a poor fixing effect on the cable to be tested, which causes the detection point to become loose, and after the cable is tested, the damaged part left by the puncture needs to be rewrapped.

[0005] Therefore, it is necessary to provide a Rogowski coil electric energy meter and a limiting mechanism thereof to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a Rogowski coil electric energy meter and a limiting mechanism thereof to solve the above technical problems.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a limiting mechanism of a Rogowski coil electric energy meter, comprising a driving base, a puncture sensor is provided in the middle of the driving base, a limiting ring for fixing the cable to be tested is provided on the upper end surface of the driving base, the limiting ring is arranged in a "C" shape, a winding mechanism is rotatably embedded in the inner wall of the limiting ring, the puncture sensor penetrates the limiting ring and extends to the inside of the limiting ring, and the winding mechanism is provided with a closing mechanism for winding around the surface of the cable to be tested.

[0008] Furthermore, a detection coil is provided on the front end surface of the driving base, and the cable to be tested is fixedly limited at the center of the detection coil by the driving base.

[0009] As a further solution of the present invention, the winding mechanism includes two groups of movable rings and connecting plates. The movable rings are arranged in a "C" shape. The two groups of movable rings are connected by connecting plates. A puncture groove adapted to the puncture sensor is formed between the movable rings. The connecting plates are provided with an inclined portion that abuts against the puncture sensor. The movable rings are driven to rotate by a driving base.

[0010] As a further solution of the present invention, the closing mechanism includes a fitting pressure plate and an insulating tape, wherein the fitting pressure plate is fixedly connected to the inner wall of the movable ring, one end of the fitting pressure plate facing away from the movable ring is elastically fitted with the cable to be tested, one end of the insulating tape is wrapped around the inside of the movable ring, and the end of the insulating tape facing away from the movable ring extends between the fitting pressure plate and the cable to be tested.

[0011] As a further solution of the present invention, the laminating pressing plates are provided with two groups, the two groups of laminating pressing plates are symmetrically arranged at the bottom of the inner wall of the movable ring, and a cutting blade is fixedly provided on one side of the laminating pressing plates.

[0012] Furthermore, the limiting ring comprises an upper sealing ring, a lower sealing ring and a rotating connecting piece, the lower sealing ring is fixedly connected to the upper end face of the driving base, the upper sealing ring is rotatably connected to the upper end face of the lower sealing ring through the rotating connecting piece, the end face of the movable ring is provided with a limiting sliding rod, the upper sealing ring and the lower sealing ring are provided with grooves adapted to the limiting sliding rod, by providing the upper sealing ring and the lower sealing ring, the rotating connecting piece can be an elastic hinge, so that the upper sealing ring can be opened to facilitate the placement of the cable to be tested, so that the limiting ring can release the restriction of the limiting ring notch on the diameter of the cable to be tested, and the movable ring can also be set when the upper sealing ring and the lower sealing ring are disconnected, and the disconnection is attracted by a magnetic attraction structure.

[0013] As a further solution of the present invention, a winding rod for winding up the insulating tape is provided inside the movable ring, and the bonding pressure plate includes a fixed base and an abutment plate, the fixed base is fixedly connected to the inner wall of the movable ring, and the abutment plate is elastically embedded inside the abutment plate.

[0014] As a further solution of the present invention, the driving base includes a driving base body, a driving rotating rod and a driving roller. The driving base body is fixedly connected to the bottom of the limiting ring, the driving rotating rod is rotatably arranged inside the driving base body, the driving roller is rotatably arranged inside the driving base body and the driving roller is in contact with the edge of the movable ring, and the driving rotating rod drives the driving roller to rotate through a driving mechanism.

[0015] As a further solution of the present invention, the driving rollers are provided with two groups symmetrically arranged inside the driving base body, the driving rollers are driven by a driving belt, and the driving belt is in contact with the outer end surface of the movable ring.

[0016] Furthermore, a driving wheel matched with the driving belt is provided on the side end surface of the driving roller for limiting the driving belt.

[0017] As a further solution of the present invention, the driving mechanism includes a first bevel gear, a driving rod, a coil spring, a rotating ring and a second bevel gear. The first bevel gear is fixedly connected to the end of the driving rotating rod, the second bevel gear is meshed with the first bevel gear, the second bevel gear drives the driving rod to rotate, the driving rod is connected to the rotating ring, and the rotating ring drives the driving roller to rotate through a transmission member.

[0018] Furthermore, a transmission wheel matched with a transmission member is provided on the top of the driving roller, and the transmission member can be a transmission belt or a chain, etc.

[0019] As a further solution of the present invention, a sleeve groove is provided inside the driving rotating rod, the puncture sensor is slidably sleeved inside the sleeve groove, a limit block is provided on the side end face of the puncture sensor, and a sliding groove adapted to the limit block is provided on the inner wall of the driving base body.

[0020] As a further solution of the present invention, the second bevel gear is driven unidirectionally with the driving rod through a one-way limiting mechanism, the driving rod is elastically connected to the rotating ring through a coil spring, a clamping plate is elastically embedded in the bottom of the rotating ring, and the side end face of the puncture sensor is provided with a limiting slot adapted to the clamping plate.

[0021] A Rogowski coil electric energy meter includes using the above-mentioned limiting structure to limit the position of a cable to be tested.

[0022] When the present invention is in use, the cable to be tested is placed in the middle of the limiting ring, and the limiting ring is used to limit the cable to be tested so that the cable to be tested passes through the center of the detection coil. The driving base is also provided with a puncture sensor, and the puncture sensor extends from the inside of the limiting ring to pierce the insulation layer of the cable to be tested for detection. After the detection is completed, when the puncture sensor withdraws, there is damage on the surface of the cable to be tested. In order to avoid the subsequent influence of the damaged part on the cable to be tested, a winding mechanism is provided. The winding mechanism will rotate around the inner wall of the limiting ring under the drive of the driving base, and at the same time drive the closing mechanism to wind around the surface of the cable to be tested, thereby closing the damaged part on the surface of the cable to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the present invention after the detection coil is removed;

[0026] Figure 3 It is a schematic diagram of the winding mechanism structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the movable ring structure of the present invention;

[0028] Figure 5 The present invention Figure 4 The enlarged structural diagram at A in the middle;

[0029] Figure 6 It is a schematic diagram of the structure of the driving base of the present invention;

[0030] Figure 7 The present invention Figure 6 The enlarged structural diagram at B in the middle;

[0031] Figure 8 The present invention Figure 6 The enlarged structural diagram at C in the middle;

[0032] Fig. 9 It is a schematic diagram of the driving roller structure of the present invention;

[0033] Fig.10 It is a schematic diagram of the internal structure of the driving rotating rod of the present invention;

[0034] Fig.11 The present invention Fig.10 The enlarged structural diagram at D in the middle;

[0035] Fig.12 It is a schematic diagram of the rotating ring structure of the present invention;

[0036] Fig.13 It is a schematic diagram of the cross-sectional structure of the driving rotating rod of the present invention.

[0037] In the figure: 1. limit ring; 2. closing mechanism; 3. winding mechanism; 4. puncture sensor; 5. driving base; 6. detection coil; 7. upper sealing ring; 8. puncture groove; 9. connecting piece; 10. movable ring; 11. lower sealing ring; 12. rotating connecting piece; 13. fitting plate; 14. insulating tape; 16. limit slide bar; 17. inclined part; 18. cutting blade; 19. test piece; 20. driving base body; 21. Driving rotating rod; 22. Driving roller; 23. Winding rod; 24. Fixed base; 25. Abutment plate; 26. Driving belt; 27. First bevel gear; 28. Driving rod; 29. ​​Winding spring; 30. Rotating ring; 31. Transmission member; 32. Transmission wheel; 33. Driving wheel; 34. Limiting slot; 35. Sleeve slot; 36. Second bevel gear; 37. One-way limiting mechanism; 38. Clamping plate; 39. Limiting block. DETAILED DESCRIPTION

[0038] Embodiment 1

[0039] like Figure 1 - Figure 2 As shown, a limiting mechanism of a Rogowski coil electric energy meter includes a driving base 5, a puncture sensor 4 is provided in the middle of the driving base 5, a limiting ring 1 for fixing a cable to be tested 19 is provided on the upper end surface of the driving base 5, the limiting ring 1 is arranged in a "C" shape, a winding mechanism 3 is rotatably embedded in the inner wall of the limiting ring 1, the puncture sensor 4 penetrates the limiting ring 1 and extends to the inside of the limiting ring 1, and the winding mechanism 3 is provided with a closing mechanism 2 for winding around the surface of the cable to be tested 19.

[0040] Furthermore, a detection coil 6 is provided on the front end surface of the driving base 5 , and the cable 19 to be tested is fixedly limited at the center of the detection coil 6 by the driving base 5 .

[0041] When in use, the cable 19 to be tested is placed in the middle of the limiting ring 1, and the limiting ring 1 is used to limit the cable 19 to be tested so that the cable 19 to be tested penetrates the center of the detection coil 6. The driving base 5 is also provided with a puncture sensor 4, and the puncture sensor 4 extends from the inside of the limiting ring 1 to penetrate the insulation layer of the cable 19 to be tested for detection. After the detection is completed, when the puncture sensor 4 withdraws, there is damage on the surface of the cable 19 to be tested. In order to avoid the subsequent influence of the damaged part on the cable 19 to be tested, a winding mechanism 3 is provided. The winding mechanism 3 will rotate around the inner wall of the limiting ring 1 under the drive of the driving base 5, and at the same time drive the closing mechanism 2 to wind around the surface of the cable 19 to be tested, thereby closing the damaged part on the surface of the cable 19 to be tested.

[0042] Embodiment 2

[0043] Based on the first embodiment, Figure 1- Figure 4 As shown, the winding mechanism 3 includes two groups of movable rings 10 and a connecting piece 9. The movable rings 10 are arranged in a "C" shape. The two groups of movable rings 10 are connected by the connecting piece 9. A puncture groove 8 adapted to the puncture sensor 4 is formed between the movable rings 10. The connecting piece 9 is provided with an inclined portion 17 that abuts against the puncture sensor 4. The movable rings 10 are driven to rotate by the driving base 5.

[0044] When in use, in order to prevent the cable 19 to be tested from falling out of the notch of the limiting ring 1 during the puncture process, a movable ring 10 is provided. The movable ring 10 is set in a "C" shape. The movable ring 10 is provided with the same notch as the limiting ring 1, so that the cable 19 to be tested can be directly placed into the middle of the limiting ring 1 through the notch for easy operation. The puncture sensor 4 extends from the inside of the driving base 5 into the inside of the puncture groove 8 and abuts against the connecting piece 9. Under the action of the inclined portion 17, as the puncture sensor 4 extends, the movable ring 10 will rotate for a section, and then the notch of the limiting ring 1 will be closed by the movable ring 10 to prevent the movement of the cable 19 to be tested during the puncture process.

[0045] like Figure 1 - Figure 5 As shown, the closing mechanism 2 includes a laminating plate 13 and an insulating tape 14. The laminating plate 13 is fixedly connected to the inner wall of the movable ring 10. The end of the laminating plate 13 facing away from the movable ring 10 is elastically fitted with the cable to be tested 19. One end of the insulating tape 14 is wrapped around the inside of the movable ring 10. The end of the insulating tape 14 facing away from the movable ring 10 extends between the laminating plate 13 and the cable to be tested 19.

[0046] When in use, the insulating tape 14 is arranged between the fitting pressure plate 13 and the cable to be tested 19 and adhered to the surface of the cable to be tested 19. As the puncture sensor 4 extends, the movable ring 10 will rotate around a part of the cable to be tested 19, so that the insulating tape 14 adheres to the bottom of the cable to be tested 19. At the same time, as the puncture sensor 4 pierces the cable to be tested 19, the insulating tape 14 will be further fixed to the cable to be tested 19 along with the puncture. When the detection is completed and the puncture sensor 4 is withdrawn, the movable ring 10 rotates around the cable to be tested 19 under the drive of the driving base 5, so that the insulating tape 14 is quickly wrapped around the surface of the cable to be tested 19, thereby quickly sealing the damaged area caused by the puncture of the puncture sensor 4.

[0047] like Figure 1 - Figure 7 As shown, there are two groups of laminating pressing plates 13 , which are symmetrically arranged at the bottom of the inner wall of the movable ring 10 , and a cutting blade 18 is fixedly provided on one side of the laminating pressing plate 13 .

[0048] When in use, the laminating pressing plate 13 is provided with two groups, and is relatively symmetrically arranged, so that when the laminating pressing plate 13 is laminating with the cable to be tested 19, part of the insulating tape 14 can be laminating to the bottom of the cable to be tested 19, and the punctured part of the cable to be tested 19 can be kept provided with the insulating tape 14 during the puncture process of the puncture sensor 4, and the end of the insulating tape 14 is further fixed between the cable to be tested 19, and a cutting blade 18 is provided on one side of the laminating pressing plate 13. In order to facilitate the separation of the cable to be tested 19 and the insulating tape 14, after the movable ring 10 is rotated to wrap around the cable to be tested 19, the cable to be tested 19 is pressed and moved toward the cutting blade 18, so that the insulating tape 14 wound on the surface of the cable to be tested 19 is cut off under the action of the cutting blade 18, so that the cable to be tested 19 can be easily taken out after being closed.

[0049] Furthermore, the limiting ring 1 includes an upper sealing ring 7, a lower sealing ring 11 and a rotating connecting piece 12, the lower sealing ring 11 is fixedly connected to the upper end surface of the driving base 5, the upper sealing ring 7 is rotatably connected to the upper end surface of the lower sealing ring 11 through the rotating connecting piece 12, the end surface of the movable ring 10 is provided with a limiting slide bar 16, the upper sealing ring 7 and the lower sealing ring 11 are provided with grooves adapted to the limiting slide bar 16, by providing the upper sealing ring 7 and the lower sealing ring 11, the rotating connecting piece 12 can be an elastic hinge, so that the upper sealing ring 7 can be opened to facilitate the placement of the cable 19 to be tested, so that the limiting ring 1 can remove the restriction of the notch of the limiting ring 1 on the diameter of the cable 19 to be tested, and the movable ring 10 can also be set with the upper sealing ring 7 and the lower sealing ring 11 disconnected, and the disconnected part is attracted by the magnetic attraction structure.

[0050] like Figure 1 - Figure 7 As shown, a winding rod 23 for winding up the insulating tape 14 is provided inside the movable ring 10, and the bonding pressure plate 13 includes a fixed base 24 and an abutment plate 25, the fixed base 24 is fixedly connected to the inner wall of the movable ring 10, and the abutment plate 25 is elastically embedded inside the abutment plate 25.

[0051] When in use, the abutment plate 25 is elastically embedded in the interior of the fixed base 24, and the cable 19 to be tested is abutted and limited by the elastic force between the fixed base 24, and the winding rod 23 can be assembled inside the movable ring 10 and the connecting piece 9, so that the insulating tape 14 can be easily replaced after it is used up. The width of the insulating tape 14 is flush with the edges of the two sets of movable rings 10, so that the insulating tape 14 can more comprehensively cover the damaged part of the cable 19 to be tested.

[0052] like Figure 1 - Figure 8As shown, the driving base 5 includes a driving base body 20, a driving rotating rod 21 and a driving roller 22. The driving base body 20 is fixedly connected to the bottom of the limiting ring 1, the driving rotating rod 21 is rotatably arranged inside the driving base body 20, the driving roller 22 is rotatably arranged inside the driving base body 20 and the driving roller 22 is in contact with the edge of the movable ring 10, and the driving rotating rod 21 drives the driving roller 22 to rotate through the driving mechanism.

[0053] When in use, the driving rod 21 drives the driving roller 22 to rotate through the driving mechanism, and the edge of the driving roller 22 fits against the outer end surface of the movable ring 10, so that the movable ring 10 can be driven to rotate inside the limiting ring 1 through the rotation of the driving roller 22, so that the movable ring 10 can drive the closing mechanism 2 to wrap around the cable to be tested 19.

[0054] like Figure 1 - Figure 6 and Figure 8-9 As shown, two groups of driving rollers 22 are symmetrically arranged inside the driving base body 20 , and the driving rollers 22 are driven by a driving belt 26 , which is in contact with the outer end surface of the movable ring 10 .

[0055] Furthermore, a driving wheel 33 adapted to the driving belt 26 is provided on the side end surface of the driving roller 22 for limiting the driving belt 26 .

[0056] When in use, since the movable ring 10 is a "C"-shaped structure, a single driving roller 22 is difficult to drive at the gap, resulting in the movable ring 10 being unable to rotate continuously. A driving belt 26 is provided between two sets of driving rollers 22. The friction of the driving belt 26 drives the movable ring 10 to rotate, and the larger contact surface of the driving belt 26 can avoid the problem of power loss at the gap, thereby allowing the movable ring 10 to rotate continuously under the drive of the driving roller 22.

[0057] like Figure 1 - Figure 8 and Figure 10-12 As shown, the driving mechanism includes a first bevel gear 27, a driving rod 28, a coil spring 29, a rotating ring 30 and a second bevel gear 36. The first bevel gear 27 is fixedly connected to the end of the driving rotating rod 21, and the second bevel gear 36 is meshed with the first bevel gear 27. The second bevel gear 36 drives the driving rod 28 to rotate. The driving rod 28 is connected to the rotating ring 30, and the rotating ring 30 drives the driving roller 22 to rotate through the transmission member 31.

[0058] Furthermore, a transmission wheel 32 adapted to the transmission member 31 is provided on the top of the driving roller 22, and the transmission member 31 can be a transmission belt or a chain, etc.

[0059] When in use, the driving rod 21 rotates and synchronously drives the driving rod 28 through the first bevel gear 27 and the second bevel gear 36 to drive the rotating ring 30 to rotate, and synchronously drives the driving roller 22 to rotate through the transmission member 31, thereby realizing the rotation drive of the driving roller 22 through the rotation of the driving rod 21.

[0060] like Figure 1 - Fig.13 As shown, a sleeve groove 35 is provided inside the driving rotating rod 21, and the puncture sensor 4 is slidably sleeved inside the sleeve groove 35. A limit block 39 is provided on the side end face of the puncture sensor 4. A sliding groove matched with the limit block 39 is provided on the inner wall of the driving base body 20, and the sleeve groove 35 is provided with a spiral groove matched with the limit block 39.

[0061] When in use, the driving rod 21 rotates and the spiral groove drives the limit block 39. At the same time, the inner wall of the driving base body 20 is provided with a sliding groove to limit the rotation of the puncture sensor 4, so that the puncture sensor 4 gradually extends from the inside of the driving rod 21 and finally pierces the cable 19 to be tested.

[0062] like Figure 1 - Fig.13 As shown, the second bevel gear 36 is unidirectionally driven with the driving rod 28 through a one-way limiting mechanism 37, the driving rod 28 is elastically connected to the rotating ring 30 through a coil spring 29, a clamping plate 38 is elastically embedded in the bottom of the rotating ring 30, and a side end face of the puncture sensor 4 is provided with a limiting slot 34 adapted to the clamping plate 38.

[0063] When in use, the one-way limiting mechanism 37 includes but is not limited to structures such as ratchets. When the puncture sensor 4 is extended, the rotating ring 30 is clamped by the clamping plate 38 and the limiting clamping groove 34. The clamping plate 38 adopts a straight-line structure, so that the rotating ring 30 stops rotating during the extension of the puncture sensor 4 to avoid affecting the movable ring 10 on the puncture sensor 4. After the puncture sensor 4 is retracted, as the puncture sensor 4 is retracted, the limiting clamping groove 34 and the clamping plate 38 are disengaged, so that the rotating ring 30 can continue to rotate to drive the driving roller 22 to drive the movable ring 10 to rotate for winding. The second bevel gear 36 drives the driving rod 28 through the one-way limiting mechanism 37, so that the driving rod 28 can only rotate in one direction. When the puncture sensor 4 is extended or retracted, the driving rod 28 will rotate and since the rotating ring 30 is fixed, the elastic potential energy of the coil spring 29 will increase until the clamping plate 38 is disengaged from the limiting clamping groove 34. Under the elastic force of the coil spring 29, the rotating ring 30 will be driven to rotate, thereby realizing the extension of the puncture sensor 4 by driving the rotation of the rotating rod 21 while completing the energy storage and driving of the rotating ring 30, thereby completing the winding work of the movable ring 10 to drive the closing mechanism 2.

[0064] A Rogowski coil electric energy meter includes using the above-mentioned limiting structure to limit the position of a cable to be tested.

[0065] Working principle: The cable 19 to be tested is placed in the middle of the limiting ring 1, and the limiting ring 1 is used to limit the cable 19 to be tested so that the cable 19 to be tested penetrates the center of the detection coil 6. The driving base 5 is also provided with a puncture sensor 4, and the puncture sensor 4 extends from the inside of the limiting ring 1 to penetrate the insulation layer of the cable 19 to be tested for detection. After the detection is completed, when the puncture sensor 4 withdraws, there is damage on the surface of the cable 19 to be tested. In order to avoid the subsequent influence of the damaged part on the cable 19 to be tested, a winding mechanism 3 is provided. The winding mechanism 3 will rotate around the inner wall of the limiting ring 1 under the drive of the driving base 5, and at the same time drive the closing mechanism 2 to wind around the surface of the cable 19 to be tested, so as to close the damaged part on the surface of the cable 19 to be tested. In order to avoid the cable 19 to be tested during the puncture process, The movable ring 10 is provided with a "C"-shaped arrangement, and the movable ring 10 is provided with the same notch as the limiting ring 1, so that the cable 19 to be tested can be directly placed into the middle part of the limiting ring 1 through the notch for easy operation. The puncture sensor 4 extends from the inside of the driving base 5 into the inside of the puncture groove 8 and abuts against the connecting piece 9. Under the action of the inclined portion 17, the movable ring 10 rotates for a section as the puncture sensor 4 extends, and then the notch of the limiting ring 1 is closed by the movable ring 10 to prevent the cable 19 to be tested from moving during the puncture process. The insulating tape 14 is arranged between the fitting pressure plate 13 and the cable 19 to be tested and adheres to the surface of the cable 19 to be tested. As the puncture sensor 4 extends, the movable ring 10 will The insulating tape 14 is partially rotated around the cable 19 to be tested, so that the insulating tape 14 adheres to the bottom of the cable 19 to be tested. At the same time, as the puncture sensor 4 pierces the cable 19 to be tested, the insulating tape 14 will be further fixed to the cable 19 to be tested as the puncture sensor 4 is pierced. When the detection is completed and the puncture sensor 4 is withdrawn, the movable ring 10 rotates around the cable 19 to be tested under the drive of the driving base 5, so that the insulating tape 14 is quickly wrapped around the surface of the cable 19 to be tested, and the damaged part caused by the puncture of the puncture sensor 4 is quickly closed. The fitting pressure plate 13 is provided with two groups, and they are relatively symmetrically arranged, so that when the fitting pressure plate 13 is fitted with the cable 19 to be tested, part of the insulating tape 14 can be fitted to the bottom of the cable 19 to be tested, and the puncture sensor 4 can be kept in the process of puncturing. The cable to be tested 19 of the pierced part is provided with an insulating tape 14, and the end of the insulating tape 14 is further fixed to the cable to be tested 19, and a cutting blade 18 is provided on one side of the fitting pressure plate 13. In order to facilitate the separation of the cable to be tested 19 and the insulating tape 14, after the movable ring 10 rotates to wrap around the cable to be tested 19, the cable to be tested 19 is pressed and moved toward the cutting blade 18, so that the insulating tape 14 wound on the surface of the cable to be tested 19 is cut off under the action of the cutting blade 18, so that the cable to be tested 19 can be easily taken out after being closed, and the abutment plate 25 is elastically embedded in the interior of the fixed base 24, and the cable to be tested 19 is abutted and limited by the elastic force between the fixed base 24, and the winding rod 23 can be assembled and arranged inside the movable ring 10 and the connecting piece 9.After the insulating tape 14 is used up, it can be easily replaced. The width of the insulating tape 14 is flush with the edges of the two sets of movable rings 10, so that the insulating tape 14 can more comprehensively cover the damaged part of the cable 19 to be tested. The driving rod 21 drives the driving roller 22 to rotate through the driving mechanism, and the edge of the driving roller 22 fits with the outer end surface of the movable ring 10, so that the movable ring 10 can be driven to rotate inside the limit ring 1 by the rotation of the driving roller 22, so that the movable ring 10 can drive the closing mechanism 2 to wind the cable 19 to be tested. Since the movable ring 10 is a "C"-shaped structure, it is difficult to drive a single driving roller 22 at the notch, resulting in the movable ring 10 cannot rotate continuously, and a driving belt 26 is provided between the two sets of driving rollers 22. The friction of the driving belt 26 drives the movable ring 10 to rotate, and the larger contact surface of the driving belt 26 can avoid the problem of power loss at the gap, so that the movable ring 10 can rotate continuously under the drive of the driving roller 22. The driving rod 21 rotates while synchronously driving the driving rod 28 through the first bevel gear 27 and the second bevel gear 36 to drive the rotation of the rotating ring 30, and synchronously drives the driving roller 22 to rotate through the transmission member 31, and then the rotation of the driving rod 21 is realized to drive the driving roller 22 to rotate. The rotation of the spiral groove drives the limit block 39, so that the puncture sensor 4 gradually extends from the inside of the driving rotating rod 21, and finally pierces the cable 19 to be tested. When the puncture sensor 4 extends, the rotating ring 30 is clamped by the clamping plate 38 and the limit clamping groove 34. The clamping plate 38 adopts a straight-line structure, so that the rotating ring 30 stops rotating during the extension of the puncture sensor 4 to avoid affecting the movable ring 10 on the puncture sensor 4. After the puncture sensor 4 is retracted, as the puncture sensor 4 is retracted, the limit clamping groove 34 and the clamping plate 38 are disengaged, so that the rotating ring 30 can continue to rotate to drive the driving roller 2 2 drives the movable ring 10 to rotate and wind, and the second bevel gear 36 drives the driving rod 28 through the one-way limiting mechanism 37, so that the driving rod 28 can only rotate in one direction. When the puncture sensor 4 is extended or retracted, the driving rod 28 will rotate and because the rotating ring 30 is fixed, the elastic potential energy of the coil spring 29 will increase until the clamping plate 38 is disengaged from the limiting clamping groove 34. Under the elastic force of the coil spring 29, the rotating ring 30 will be driven to rotate, so that the puncture sensor 4 is extended by the rotation of the driving rotating rod 21, and the rotating ring 30 is stored and driven at the same time, thereby completing the winding work of the movable ring 10 driving the closing mechanism 2.

Claims

1. A limiting mechanism of a Rogowski coil electric energy meter, comprising a driving base, characterized in that: A puncture sensor is provided at the middle part of the driving base, and a limit ring for fixing the cable to be tested is provided on the upper end surface of the driving base, the limit ring is arranged in a "C" shape, and a winding mechanism is rotatably embedded in the inner wall of the limit ring, the puncture sensor penetrates the limit ring and extends to the inside of the limit ring, and the winding mechanism is provided with a closing mechanism wound around the surface of the cable to be tested; the winding mechanism comprises two groups of movable rings and a connecting piece, the movable ring is arranged in a "C" shape, the two groups of movable rings are connected by a connecting piece, a puncture groove adapted to the puncture sensor is formed between the movable rings, the connecting piece is provided with an inclined portion abutting against the puncture sensor, and the movable ring is driven to rotate by the driving base; the closing mechanism comprises a fitting pressing plate and an insulating tape, the fitting pressing plate is fixedly connected to the inner wall of the movable ring, one end of the fitting pressing plate away from the movable ring is elastically fitted with the cable to be tested, one end of the insulating tape is wound around the inside of the movable ring, and the end of the insulating tape away from the movable ring extends between the fitting pressing plate and the cable to be tested; The driving base comprises a driving base body, a driving rotating rod and a driving roller, wherein the driving base body is fixedly connected to the bottom of the limiting ring, the driving rotating rod is rotatably arranged inside the driving base body, the driving roller is rotatably arranged inside the driving base body and the driving roller is in contact with the edge of the movable ring, and the driving rotating rod drives the driving roller to rotate through a driving mechanism; The driving rollers are provided with two groups symmetrically arranged inside the driving base body, and the driving rollers are driven by a driving belt, and the driving belt is in contact with the outer end surface of the movable ring; The driving mechanism includes a first bevel gear, a driving rod, a coil spring, a rotating ring and a second bevel gear, wherein the first bevel gear is fixedly connected to the end of the driving rotating rod, the second bevel gear is meshed with the first bevel gear, the second bevel gear drives the driving rod to rotate, the driving rod is connected to the rotating ring, and the rotating ring drives the driving roller to rotate through a transmission member; A sleeve groove is provided inside the driving rotating rod, and the puncture sensor is slidably sleeved inside the sleeve groove. A limit block is provided on the side end face of the puncture sensor, and a slide groove matched with the limit block is provided on the inner wall of the driving base body. The second bevel gear is driven unidirectionally with the driving rod through a one-way limiting mechanism, and the driving rod is elastically connected to the rotating ring through a coil spring. A clamping plate is elastically embedded in the bottom of the rotating ring, and a limit clamping groove matched with the clamping plate is provided on the side end face of the puncture sensor.

2. The limiting mechanism of the Rogowski coil electric energy meter according to claim 1, characterized in that: The laminating pressing plates are provided with two groups, and the two groups of laminating pressing plates are symmetrically arranged at the bottom of the inner wall of the movable ring, and a cutting blade is fixedly provided on one side of the laminating pressing plates.

3. The limiting mechanism of the Rogowski coil electric energy meter according to claim 1, characterized in that: A reeling rod for reeling in the insulating tape is provided inside the movable ring, and the laminating pressing plate comprises a fixed base and an abutting plate, wherein the fixed base is fixedly connected to the inner wall of the movable ring, and the abutting plate is elastically embedded inside the abutting plate.

4. A Rogowski coil electric energy meter, comprising the limiting mechanism according to any one of claims 1 to 3.

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