A device and method for testing the resistance of an inner tapered sleeve circuit.

Abstract

This invention relates to the field of high-voltage switchgear testing technology, specifically to a device and method for testing the circuit resistance of an inner tapered sleeve. The device includes a current transmission mechanism and a conductive mechanism disposed at one end of the current transmission mechanism. The conductive mechanism includes a contact and multiple conductive fingers of different diameters arranged in a ring outside the contact for contacting the conductor of the inner wall of the inner tapered sleeve. The conductive fingers are arranged in ascending order of diameter towards the current transmission mechanism. The contact is connected to the current transmission mechanism and is used to cooperate with the inner tapered sleeve. The conductive fingers of different diameters are used to adapt to different types of inner tapered sleeves and guide current into the current transmission mechanism. The end of the current transmission mechanism away from the conductive mechanism is connected to the terminal of a circuit resistance tester. This device can simultaneously meet the circuit resistance testing requirements of multiple different types of inner tapered sleeves, and is simple to operate and quick to install.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switchgear testing technology, specifically to a device and method for testing the resistance of an inner tapered sleeve circuit. Background Technology

[0002] Currently, inner tapered bushings are widely used in medium and high voltage gas-filled switchgear as the ports for incoming and outgoing lines. During installation, commissioning, inspection and maintenance, it is necessary to measure the loop resistance. However, due to the mismatch between the inner tapered bushing port and the wiring terminals of the loop resistance tester, there are many defects in the loop resistance test.

[0003] In traditional measurements, the wiring of the current input and output points requires manual assistance and multiple people to complete the test. However, manual assistance can lead to poor contact between the circuit resistance tester's terminals and the input or output terminals of the inner conical sleeve, reducing contact stability and affecting test accuracy. Furthermore, after multiple measurements, the temperature of the circuit resistance tester's terminals and the input or output terminals of the inner conical sleeve will rise, increasing the risk of manual assistance.

[0004] Chinese utility model patent CN201277980Y, authorized on July 22, 2009, discloses a resistance test adapter for an inner conical sleeve circuit. This adapter includes a current-introducing rod, a contact, a measurement point output rod, a compression spring, and an insulating connecting plate. During measurement, the adapter is inserted into the inner conical sleeve, the measurement point output rod is placed at the measurement point, and then the current output line and measurement input line of the circuit resistance tester are clamped to the current input rod and measurement point output rod of the adapter, respectively, to perform the circuit resistance test. This utility model's adapter eliminates the need for manual operation during current introduction and measurement point output, thus removing the influence of human factors on the measurement results and improving measurement accuracy.

[0005] However, the contact diameter of the aforementioned resistance test adapter for the inner conical sleeve circuit is fixed, and it is only suitable for resistance testing of a fixed type of inner conical sleeve circuit. When resistance testing of multiple types of inner conical sleeve circuits is required, multiple resistance test adapters with different contact diameters are needed. It is impossible to complete resistance testing of different types of inner conical sleeve circuits on the same inner conical sleeve circuit resistance testing device. At the same time, the aforementioned resistance test adapter can only perform tests in the horizontal direction and cannot perform multi-dimensional tests. Summary of the Invention

[0006] The purpose of this invention is to provide an inner conical sleeve circuit resistance testing device to solve the problem that the resistance testing adapter for inner conical sleeve circuits in the prior art cannot perform resistance testing on different models of inner conical sleeve circuits.

[0007] To address the aforementioned problems, this invention proposes a device for testing the resistance of an inner tapered sleeve circuit. The technical solution adopted is as follows:

[0008] A circuit resistance testing device for an inner tapered sleeve includes a current transmission mechanism and a conductive mechanism disposed at one end of the current transmission mechanism. The conductive mechanism includes a contact and a plurality of conductive fingers of different diameters arranged in a ring outside the contact for contacting the conductor of the inner wall of the inner tapered sleeve. The conductive fingers are arranged in ascending order of diameter toward the current transmission mechanism. The contact is connected to the current transmission mechanism and is used to cooperate with the inner tapered sleeve. The conductive fingers of different diameters are used to adapt to different types of inner tapered sleeves and guide current into the current transmission mechanism. The end of the current transmission mechanism away from the conductive mechanism is connected to the terminal of a circuit resistance tester.

[0009] Furthermore, the contact is provided with multiple grooves of different diameters, which are arranged in order of increasing diameter toward the current transmission mechanism. The conductive contact finger is a spring contact finger, which is fitted onto the contact through the groove and contacts the conductor on the inner wall of the inner conical sleeve.

[0010] Furthermore, an insulating mounting component is detachably connected to the current transmission mechanism. The insulating mounting component is fixedly connected to the inner conical sleeve base to fix the conductive mechanism and the current transmission mechanism to the inner conical sleeve.

[0011] Furthermore, the current transmission mechanism includes a guide rod, which is detachably connected to the contact, and the insulating mounting component is detachably connected to the guide rod.

[0012] Furthermore, the insulating mounting component is a circular insulating plate with a first internal threaded hole, and the guide rod is provided with an external thread. The guide rod and the circular insulating plate are threadedly connected so that the circular insulating plate can move along the length direction of the guide rod.

[0013] Furthermore, the circular insulating plate is provided with multiple inner conical sleeve mounting holes of various specifications. The inner conical sleeve mounting holes are used to fix inner conical sleeve bases of different models to the circular insulating plate by screws. The inner conical sleeve mounting holes of the same specifications are evenly distributed along the circumference of the circular insulating plate.

[0014] Furthermore, the guide rod is a wedge-shaped guide rod, with a wedge-shaped end at one end and a wedge-shaped hole inside the contact. The wedge-shaped end is wedge-shapedly connected to the wedge-shaped hole. A continuous external thread is provided on the end of the wedge-shaped guide rod away from the wedge-shaped end, and the circular insulating plate is connected to the wedge-shaped guide rod through the continuous external thread.

[0015] Furthermore, the guide rod is a threaded guide rod, one end of which is provided with an external thread end, and the contact has a second internal thread hole inside. The external thread end is threadedly connected to the second internal thread hole. The threaded guide rod is provided with multiple fastening threads, and the circular insulating plate is connected to the threaded guide rod through multiple fastening threads.

[0016] Furthermore, the current transmission mechanism also includes an L-shaped copper plate, one side of which is provided with a copper plate mounting hole, and the end of the guide rod away from the contact is provided with a third internal thread hole. The copper plate mounting hole is connected to the third internal thread hole on the guide rod by a screw, and the other side of the L-shaped copper plate is used to connect to the wiring terminal of the loop resistance tester.

[0017] Beneficial Effects: This invention is an improved invention. It utilizes multiple annular conductive fingers of different diameters arranged on the outer side of the contact point to contact the conductor of the inner wall of the inner conical sleeve, thereby realizing the input of current into the current transmission mechanism. Simultaneously, the conductive fingers are arranged in ascending order of diameter towards the current transmission mechanism. Since different models of inner conical sleeves have different diameters, conductive fingers of different diameters can adapt to different models of inner conical sleeves to achieve current input, resulting in a wide range of applications. The inner conical sleeve circuit resistance testing device of this invention can simultaneously meet the resistance testing requirements of multiple different models of inner conical sleeve circuits. Resistance testing of different models of inner conical sleeve circuits can be completed on the same device, without relying on manual assistance for fixing the test. Operation is simple and installation is quick.

[0018] The contact head is provided with multiple grooves of different diameters, which are arranged in ascending order of diameter towards the current transmission mechanism. The conductive contact finger is a spring contact finger, which is fitted onto the contact head through the groove and contacts the conductor on the inner wall of the inner conical sleeve. The spring contact finger makes the connection between the contact head and the conductor on the inner wall of the inner conical sleeve tighter, and plays a fixing role while conducting electricity, so that the contact head is installed stably. This structure is simple and easy to operate.

[0019] An insulating mounting component is detachably connected to the current transmission mechanism. The insulating mounting component is fixedly connected to the inner conical sleeve base to fix the conductive mechanism and the current transmission mechanism to the inner conical sleeve. This solution fixes the inner conical sleeve circuit resistance testing device for easy testing. After fixing, no manual assistance is required. At the same time, multi-dimensional testing can be performed, improving the safety of the testing process and the accuracy of the test results.

[0020] The current transmission mechanism includes a guide rod, which is detachably connected to a contact. The insulating mounting component is detachably connected to the guide rod. This structure is simple and facilitates the use of different types of guide rods and contacts.

[0021] The insulating mounting component is a circular insulating plate with a first internal threaded hole. The guide rod is provided with an external thread. The guide rod and the circular insulating plate are threadedly connected, allowing the circular insulating plate to move along the length of the guide rod. This solution allows the circular insulating plate to be positioned on the guide rod via the thread, adapting to inner conical sleeves of different depths, thereby achieving the fixing of inner conical sleeves of different models.

[0022] The circular insulating plate is provided with multiple mounting holes for inner conical sleeves of various specifications. These mounting holes are used to fix inner conical sleeve bases of different models to the circular insulating plate using screws. The mounting holes of the same specification are evenly distributed along the circumference of the circular insulating plate. The mounting holes on the circular insulating plate allow for quick alignment with the mounting holes for the inner conical sleeve bases, enabling rapid installation. Furthermore, the fixing method utilizes the nearest mounting hole for the inner conical sleeve base, simplifying operation and making it suitable for different models of inner conical sleeves.

[0023] The guide rod is a wedge-shaped guide rod with a wedge-shaped end at one end and a wedge-shaped hole inside the contact. The wedge-shaped end and the wedge-shaped hole are connected in a wedge shape. The end of the wedge-shaped guide rod away from the wedge-shaped end is provided with a continuous external thread. The circular insulating plate is connected to the wedge-shaped guide rod through the continuous external thread. This structure is simple, facilitates the operation of the guide rod and the contact, and also facilitates the reciprocating movement of the circular insulating plate along the length of the guide rod.

[0024] The guide rod is a threaded guide rod, with an external threaded end at one end and a second internal threaded hole inside the contact. The external threaded end is threadedly connected to the second internal threaded hole. The threaded guide rod has multiple fastening threads, and the circular insulating plate is connected to the threaded guide rod through multiple fastening threads. This effectively prevents the silver plating layer on the surface of the circular insulating plate from falling off due to rotation as it moves back and forth on the continuous external threads to accommodate different models of inner conical sleeves, thus increasing the resistance of the test device and affecting the test error.

[0025] The current transmission mechanism also includes an L-shaped copper plate. One side of the L-shaped copper plate is provided with a copper plate mounting hole. The end of the guide rod away from the contact is provided with a third internal thread hole. The copper plate mounting hole is connected to the third internal thread hole on the guide rod by a screw. The other side of the L-shaped copper plate is used to connect to the terminal of the loop resistance tester, so as to facilitate effective connection with the terminal of the loop resistance tester.

[0026] This invention also provides a method for testing the circuit resistance of an inner conical sleeve, which is implemented using the aforementioned inner conical sleeve circuit resistance testing device. First, the contacts in the conductive mechanism of the inner conical sleeve circuit resistance testing device are inserted into the inner conical sleeve, so that the conductive fingers in the conductive mechanism contact the conductor on the inner wall of the inner conical sleeve, and the conductive fingers input current into the current transmission mechanism. Then, the terminals of the circuit resistance tester are connected to the current transmission mechanism to complete the inner conical sleeve circuit resistance test.

[0027] Beneficial effects: The inner conical sleeve circuit resistance testing method of the present invention can simultaneously meet the resistance testing of multiple different models of inner conical sleeve circuits. It can complete the resistance testing of different models of inner conical sleeve circuits on the same inner conical sleeve circuit resistance testing device, and does not rely on human assistance for fixed testing, making the operation simple. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the inner conical sleeve circuit resistance testing device in Embodiment 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of the T-type contact in Embodiment 1 of the inner tapered sleeve circuit resistance testing device of the present invention;

[0030] Figure 3 This is a schematic diagram of the spring contact finger in Embodiment 1 of the inner conical sleeve circuit resistance testing device of the present invention;

[0031] Figure 4 This is a schematic diagram of the wedge-shaped guide rod in Embodiment 3 of the inner conical sleeve circuit resistance testing device of the present invention;

[0032] Figure 5 This is a schematic diagram of the threaded guide rod in Embodiment 3 of the inner tapered sleeve circuit resistance testing device of the present invention;

[0033] Figure 6 This is a schematic diagram of the circular insulating plate in Embodiment 2 of the inner conical sleeve circuit resistance testing device of the present invention;

[0034] Figure 7 This is a schematic diagram of the L-shaped copper plate in Embodiment 4 of the inner conical sleeve circuit resistance testing device of the present invention;

[0035] Figure 8 This is a schematic diagram of the resistance test of the #2 inner conical sleeve circuit using a wedge-shaped guide rod in Embodiment 1 of the inner conical sleeve circuit resistance test method of the present invention.

[0036] Figure 9 This is a schematic diagram of the resistance test of the #3 inner conical sleeve circuit using a wedge-shaped guide rod in Embodiment 1 of the inner conical sleeve circuit resistance test method of the present invention.

[0037] Figure 10 This is a schematic diagram of the resistance test of the #3 inner tapered sleeve circuit using a threaded guide rod in Embodiment 1 of the inner tapered sleeve circuit resistance test method of the present invention.

[0038] In the diagram, 1. T-type contacts of grades 1 and 2; 11. Wedge-shaped hole; 12. Large-diameter spring contact finger assembly slot; 13. Small-diameter spring contact finger assembly slot; 2. Spring contact finger; 21. Small-diameter spring contact finger; 22. Large-diameter spring contact finger; 3. Wedge-shaped guide rod; 31. Wedge-shaped end; 32. Continuous external thread; 33. Internal thread countersunk hole; 34. External thread end; 35. Fastening thread of mounting plate #2 internal conical sleeve; 36. Fastening thread of mounting plate #3 internal conical sleeve; 37. Test end; 4. Circular insulating plate; 41. The first... 1. Internal threaded hole; 42. Mounting hole for 2# internal conical sleeve; 43. Mounting hole for 3# internal conical sleeve; 5. L-shaped copper plate; 51. Mounting hole for copper plate; 6. Screw; 7. 2# internal conical sleeve; 71. Conductor on the inner wall of 2# internal conical sleeve; 72. Internal threaded hole in the base of 2# internal conical sleeve; 73. Base of 2# internal conical sleeve; 74. Internal insulator of 2# internal conical sleeve; 8. 3# internal conical sleeve; 81. Conductor on the inner wall of 3# internal conical sleeve; 82. Internal threaded hole in the base of 3# internal conical sleeve; 83. Base of 3# internal conical sleeve. Detailed Implementation

[0039] As cited in the background art, existing resistance testing adapters for inner conical sleeve circuits cannot perform resistance tests on different models of inner conical sleeve circuits. Therefore, this invention provides an inner conical sleeve circuit resistance testing device, including a current transmission mechanism for transmitting current, and a conductive mechanism disposed at one end of the current transmission mechanism for contacting the inner wall conductor of the inner conical sleeve to guide current into the current transmission mechanism. The conductive mechanism includes a contact and multiple annular conductive fingers of different diameters disposed outside the contact and for contacting the inner wall conductor of the inner conical sleeve. The contact is used to mate the inner conical sleeve circuit resistance testing device with the inner conical sleeve, and the conductive fingers are used to guide the current in the inner conical sleeve into the current transmission mechanism. The conductive fingers are arranged in ascending order of diameter towards the current transmission mechanism. Since different models of inner conical sleeves have different diameters, conductive fingers of different diameters can adapt to different models of inner conical sleeves to achieve current input, thus having a wide range of applications. The inner conical sleeve circuit resistance testing device of this invention can meet the resistance testing needs of various models of inner conical sleeve circuits, and does not rely on manual assistance for fixing the test, making it simple to operate and quick to install.

[0040] Specific embodiment 1 of the inner tapered sleeve circuit resistance testing device of the present invention:

[0041] In this embodiment, as Figure 1As shown, the inner tapered sleeve circuit resistance testing device includes a current transmission mechanism and a conductive mechanism disposed at one end of the current transmission mechanism. The conductive mechanism includes multiple conductive fingers of different diameters arranged in a ring outside the contact and used to contact the conductor of the inner wall of the inner tapered sleeve. The conductive fingers are arranged in order of increasing diameter towards the current transmission mechanism, that is, the smaller diameter conductive fingers are closer to the contact. The contact is connected to the current transmission mechanism. Figure 2 , Figure 3 As shown, the contact is a level 2 T-type contact 1. The T-type contact has grooves of two diameters. The conductive contact finger is a spring contact finger 2. Specifically, the grooves on the T-type contact include a small-diameter spring contact finger mounting groove 13 and a large-diameter spring contact finger mounting groove 12. The spring contact finger 2 includes a small-diameter spring contact finger 21 and a large-diameter spring contact finger 22. The small-diameter spring contact finger 21 and the large-diameter spring contact finger 22 are respectively fitted into the small-diameter spring contact finger mounting groove 13 and the large-diameter spring contact finger mounting groove 12. Relative to the top of the contact, the small-diameter spring contact finger mounting groove 13 is positioned before the large-diameter spring contact finger mounting groove 12 to meet the installation circuit requirements of various models of inner tapered sleeves.

[0042] When measuring different models of inner conical sleeves, a T-shaped contact with a spring contact finger 2 is inserted into the inner conical sleeve to complete the fit. The spring contact fingers 2 of different diameters on the T-shaped contact form a tight contact with the inner wall conductors of different models of inner conical sleeves. The spring contact fingers 2 input the current into the current transmission mechanism, and connect to the wiring terminal of the loop resistance tester through the current transmission mechanism, thereby realizing the loop resistance test of the corresponding model of inner conical sleeve.

[0043] In other embodiments, the contact is a T-shaped contact with two convex rings of different diameters arranged in a ring on the T-shaped contact. The conductive contact finger is one of these convex rings, which is integrally formed with the T-shaped contact. The smaller diameter convex ring is positioned before the larger diameter convex ring, closer to the top of the contact. When measuring different models of inner tapered sleeves, the T-shaped contact is inserted into the inner tapered sleeve to complete the fit. The convex rings of different diameters on the T-shaped contact form a tight contact with the conductors on the inner wall of the inner tapered sleeve of different models. The convex rings input current into the current transmission mechanism, which is then connected to the terminals of the loop resistance tester, thus realizing the loop resistance test of the corresponding model of inner tapered sleeve.

[0044] In other embodiments, the T-type contact can be a level 3 T-type contact or a level 4 T-type contact, depending on the model of the inner tapered sleeve.

[0045] In other embodiments, the conductive contacts are watchband contacts.

[0046] Specific embodiment 2 of the inner tapered sleeve circuit resistance testing device of the present invention:

[0047] Based on the above-described technical concept of the present invention, or based on the specific embodiments of the present invention described above, another embodiment is provided below.

[0048] In this embodiment, as Figure 1 As shown, an insulating mounting component is detachably connected to the current transmission mechanism. This insulating mounting component is fixedly connected to the inner conical sleeve base, thereby fixing the conductive mechanism and the current transmission mechanism to the inner conical sleeve. The current transmission mechanism includes a guide rod, which is detachably connected to a T-type contact. The insulating mounting component is detachably connected to the guide rod, thus fixing the inner conical sleeve circuit resistance testing device for easy testing. Once fixed, no manual assistance is required, improving the safety of the testing process and the accuracy of the test results.

[0049] When the insulating mounting component is installed on the guide rod, it can be fixedly connected to the guide rod, meaning it cannot move on the guide rod. However, because the position of the insulating mounting component on the guide rod is fixed, it cannot move, which means it may only be suitable for fixing one type of inner conical sleeve base and cannot adapt to fixing bases of inner conical sleeves of different depths. Therefore, in this embodiment, preferably... Figure 6 As shown, the insulating mounting component is a circular insulating plate 4 with a first internal threaded hole 41. The circular insulating plate 4 is an epoxy glass cloth board. The guide rod is provided with an external thread. The guide rod and the circular insulating plate 4 are threadedly connected, so that the circular insulating plate 4 can move back and forth along the length of the guide rod. This solution can be adapted to different depths of inner conical sleeves by adjusting the position of the circular insulating plate 4 on the guide rod through the thread, thereby realizing the fixing of inner conical sleeves of different models.

[0050] Specifically, the circular insulating plate 4 is provided with multiple mounting holes for inner conical sleeves of various specifications. These mounting holes are used to fix inner conical sleeve bases of different models to the circular insulating plate 4 using screws 6. The mounting holes of the same specifications are evenly distributed along the circumference of the circular insulating plate 4. Specifically, on the circular insulating plate 4, the #2 inner conical sleeve has a #2 inner conical sleeve mounting hole 42, which corresponds to the #2 inner conical sleeve base internal thread hole 72; the #3 inner conical sleeve has a #3 inner conical sleeve mounting hole 43, which corresponds to the #3 inner conical sleeve base internal thread hole 82. The mounting holes for inner conical sleeves on the circular insulating plate 4 allow for quick positioning with the inner conical sleeve base mounting holes, enabling rapid installation. Furthermore, the fixing method utilizes the nearest inner conical sleeve base mounting hole, simplifying operation; and it is applicable to different models of inner conical sleeves.

[0051] In other embodiments, the guide rod and the T-type contact can be integrally welded.

[0052] In other embodiments, the circular insulating plate 4 can be other rigid insulating materials.

[0053] Specific embodiment 3 of the inner tapered sleeve circuit resistance testing device of the present invention:

[0054] Based on the above-described technical concept of the present invention, or based on the specific embodiments of the present invention described above, another embodiment is provided below.

[0055] To facilitate quick connection and disconnection of the contacts and guide rods, in this embodiment, as follows: Figure 2 , Figure 4 As shown, the guide rod is a wedge-shaped guide rod 3. One end of the wedge-shaped guide rod 3 is provided with a wedge-shaped end 31. The contact has a wedge-shaped hole 11 inside. The wedge-shaped end 31 of the wedge-shaped guide rod 3 is wedge-shaped connected to the wedge-shaped hole 11 of the contact. The end of the wedge-shaped guide rod 3 away from the wedge-shaped end 31 is provided with a continuous external thread 32. The circular insulating plate 4 is connected to the wedge-shaped guide rod 3 through the continuous external thread 32. This structure is simple and easy to operate. The circular insulating plate 4 can move back and forth along the length of the guide rod, which can meet the requirements of various models (2# inner conical sleeve, 3# inner conical sleeve, 4# inner conical sleeve) inner conical sleeve circuits and guide rod designs of different depths.

[0056] In another implementation, such as Figure 5 As shown, the guide rod is a threaded guide rod. One end of the threaded guide rod has an external thread end 34, and the contact has a second internal thread hole. The external thread end 34 is threadedly connected to the second internal thread hole. The threaded guide rod has multiple fastening threads, namely the fastening thread 35 of the No. 2 inner conical sleeve mounting plate and the fastening thread 36 of the No. 3 inner conical sleeve mounting plate. The circular insulating plate 4 is connected to the threaded guide rod through multiple fastening threads. In use, when used to test the circuit resistance of the No. 2 inner conical sleeve 7, the circular insulating plate 4 is connected to the fastening thread 35 of the No. 2 inner conical sleeve mounting plate; when used to test the circuit resistance of the No. 3 inner conical sleeve 8, the circular insulating plate 4 is connected to the fastening thread 36 of the No. 3 inner conical sleeve mounting plate. This effectively prevents the silver plating layer on the surface of the circular insulating plate 7 from falling off due to rotation as it moves back and forth on the continuous external threads to accommodate different models of inner conical sleeves, which would increase the resistance of the test device and thus affect the test error.

[0057] In other embodiments, the guide rod is a wedge-shaped guide rod 3, which has multiple fastening threads, namely the fastening thread 35 of the No. 2 inner conical sleeve mounting plate and the fastening thread 36 of the No. 3 inner conical sleeve mounting plate. The circular insulating plate 4 is connected to the wedge-shaped guide rod 3 through the multiple fastening threads.

[0058] In other embodiments, the guide rod is a threaded guide rod, and a continuous external thread 32 is provided at one end of the threaded guide rod away from the external thread end 34. The circular insulating plate 4 is connected to the wedge-shaped guide rod 3 through the continuous external thread 32.

[0059] Specific embodiment 4 of the inner tapered sleeve circuit resistance testing device of the present invention:

[0060] Based on the above-described technical concept of the present invention, or based on the specific embodiments of the present invention described above, another embodiment is provided below.

[0061] In this embodiment, as Figure 7 As shown, the current transmission mechanism also includes an L-shaped copper plate 5. One side of the L-shaped copper plate 5 is provided with a copper plate mounting hole 51, and the end of the guide rod away from the contact is provided with a third internal thread hole. That is, the copper plate mounting hole 51 is connected to the third internal thread hole on the guide rod by a screw 6. The other side of the L-shaped copper plate 5 is used to connect the wiring terminal of the circuit resistance tester. The T-shaped contact, the guide rod, the spring contact finger 2, and the L-shaped copper plate 5 should be silver-plated.

[0062] Specifically, when the guide rod is a wedge-shaped guide rod 3, an internally threaded countersunk hole 33 is provided at the end of the wedge-shaped guide rod 3 away from the contact. The copper plate mounting hole 51 is connected to the internally threaded countersunk hole 33 on the wedge-shaped guide rod 3 by a screw 6. The other side of the L-shaped copper plate 5 is used to connect the wiring terminal of the loop resistance tester, which facilitates connection with the wiring terminal of the loop resistance tester.

[0063] Specifically, when the guide rod is a threaded guide rod, an internal thread countersunk hole is also provided at the end of the threaded guide rod away from the contact. The copper plate mounting hole 51 is connected to the internal thread countersunk hole on the threaded guide rod by a screw 6. The other side of the L-shaped copper plate 5 is used to connect the wiring terminal of the circuit resistance tester.

[0064] In other embodiments, for the threaded guide rod, a test end 37 is provided at the end of the threaded guide rod away from the contact. The test end 37 is integrally connected to the threaded guide rod and is used to connect to the wiring terminal of the loop resistance tester. This structure does not require the L-shaped copper plate 5 and can directly connect to the wiring terminal of the loop resistance tester, which is simple in structure.

[0065] In other embodiments, for the wedge-shaped guide rod 3, a test end 37 is provided at the end of the wedge-shaped guide rod 3 away from the contact. The test end 37 is integrally connected to the wedge-shaped guide rod 3 and is used to connect to the wiring terminal of the loop resistance tester.

[0066] In other embodiments, when the current transmission mechanism also includes an L-shaped copper plate 5, the terminals of the loop resistance tester can be directly connected to the screw 6.

[0067] In other embodiments, the terminals of the loop resistance tester can also be directly connected to the end of the threaded guide rod or wedge-shaped guide rod 3 away from the contact.

[0068] In other embodiments, the L-shaped copper plate 5 and the end of the threaded guide rod or wedge-shaped guide rod 3 can be integrally welded together.

[0069] In other embodiments, the T-type contact, guide rod, and L-shaped copper plate 5 can also be made of pure copper.

[0070] Specific embodiment 1 of the inner tapered sleeve circuit resistance testing method of the present invention:

[0071] In this embodiment, the inner conical sleeve circuit resistance test method is implemented using the inner conical sleeve circuit resistance test device described above. First, the contacts in the conductive mechanism of the inner conical sleeve circuit resistance test device are inserted into the inner conical sleeve, so that the conductive fingers in the conductive mechanism contact the conductor on the inner wall of the inner conical sleeve, and the conductive fingers input the current into the current transmission mechanism. Then, the circuit resistance tester terminals are connected to the current transmission mechanism to complete the inner conical sleeve circuit resistance test.

[0072] Specifically, when performing the resistance test of the 7-loop circuit of the #2 inner tapered sleeve, such as Figure 8 As shown, firstly, the second-stage T-type contact 1 with spring contact finger 2 installed is inserted into the interior of the #2 inner conical sleeve 7. The small-diameter spring contact finger 21 on the second-stage T-type contact 1 is in close contact with the conductor 71 on the inner wall of the #2 inner conical sleeve. The wedge-shaped end 31 of the wedge-shaped guide rod 3 is wedge-shaped connected to the wedge-shaped hole 11 of the contact. Secondly, the circular insulating plate 4 is rotated so that the circular insulating plate 4 moves along the length of the guide rod on the continuous external thread 32 on the wedge-shaped guide rod 3, so that the circular insulating plate 4 is in contact with the base 73 of the #2 inner conical sleeve. Then, screw 6 is passed through the mounting hole 42 of the #2 inner conical sleeve and connected to the internal threaded hole 72 of the #2 inner conical sleeve base to fix the second-stage T-type contact 1 and the wedge-shaped guide rod 3. The internal insulator 74 of the #2 inner conical sleeve is located inside the #2 inner conical sleeve near the conductor. Next, L-shaped copper plate 5 is connected to the internal threaded countersunk hole on the wedge-shaped guide rod 3 through the copper plate mounting hole 51 using screw 6. Finally, the circuit resistance tester terminals are connected to L-shaped copper plate 5 to realize the circuit resistance test of the #2 inner conical sleeve.

[0073] Specifically, when performing the 8-loop resistance test of the #3 inner tapered sleeve, such as Figure 9 As shown, firstly, the level 3 T-type contact with spring finger 2 installed is inserted into the interior of the #3 inner conical sleeve 8. The large-diameter spring finger 22 on the level 3 T-type contact is in close contact with the conductor 81 on the inner wall of the #3 inner conical sleeve. The wedge-shaped end 31 of the wedge-shaped guide rod 3 is wedge-shaped connected to the wedge-shaped hole 11 of the contact. Secondly, the circular insulating plate 4 is rotated so that it moves along the length of the guide rod on the continuous external thread 32 on the wedge-shaped guide rod 3, so that the circular insulating plate 4 is in contact with the base 83 of the #3 inner conical sleeve. Then, the screw 6 is passed through the mounting hole 43 of the #3 inner conical sleeve and connected to the internal thread hole 82 of the base of the #3 inner conical sleeve to fix the level 3 T-type contact and the wedge-shaped guide rod 3. Next, the L-shaped copper plate 5 is connected to the internal thread countersunk hole on the wedge-shaped guide rod 3 through the copper plate mounting hole 51 using the screw 6. Finally, the circuit resistance tester terminal is connected to the L-shaped copper plate 5, thus realizing the circuit resistance test of the #3 inner conical sleeve.

[0074] In another implementation, when performing the 8-loop resistance test of the #3 inner tapered sleeve, such as Figure 10 As shown, firstly, the level 3 T-type contact with spring finger 2 installed is inserted into the interior of the #3 inner conical sleeve 8. The large-diameter spring finger 22 on the level 3 T-type contact is in close contact with the conductor 81 on the inner wall of the #3 inner conical sleeve. The external thread end 34 of the threaded guide rod is threadedly connected to the internal threaded hole of the contact. Secondly, the circular insulating plate 4 is rotated so that it moves along the length of the guide rod on the fastening thread 36 of the mounting plate of the #3 inner conical sleeve, so that the circular insulating plate 4 is in contact with the base 83 of the #3 inner conical sleeve. Then, the screw 6 is passed through the mounting hole 43 of the #3 inner conical sleeve and connected to the internal threaded hole 82 of the base of the #3 inner conical sleeve, thus fixing the level 3 T-type contact and the threaded guide rod. Finally, the circuit resistance tester terminal is connected to the test end 37 on the threaded guide rod away from the contact, thus realizing the circuit resistance test of the #3 inner conical sleeve.

[0075] Through the above description of specific embodiments of the inner conical sleeve circuit resistance testing device of the present invention, it can be seen that the inner conical sleeve circuit resistance testing device of the present invention includes a current transmission mechanism for transmitting current, and a conductive mechanism disposed at one end of the current transmission mechanism for contacting the inner wall conductor of the inner conical sleeve to guide the current into the current transmission mechanism; the conductive mechanism includes a contact and a plurality of conductive fingers of different diameters arranged in a ring outside the contact and used for contacting the inner wall conductor of the inner conical sleeve. The contact is used to complete the mating of the inner conical sleeve circuit resistance testing device with the inner conical sleeve, and the conductive fingers are used to guide the current in the inner conical sleeve into the current transmission mechanism; the conductive fingers are arranged in ascending order of diameter towards the current transmission mechanism. Since different models of inner conical sleeves have different diameters, conductive fingers of different diameters can adapt to different models of inner conical sleeves to realize current input, thus having a wide range of applications. The inner conical sleeve circuit resistance testing device of the present invention can meet the circuit resistance testing of various models of inner conical sleeves, and is simple to operate and quick to install.

[0076] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. An inner cone sleeve circuit resistance test device characterized by, The current transmission mechanism and the electrically conductive mechanism arranged at one end of the current transmission mechanism, the electrically conductive mechanism includes a contact and a plurality of annularly arranged electrically conductive fingers of different diameters outside the contact and used for contacting the inner wall conductor of the inner cone sleeve, the electrically conductive fingers are arranged from small to large in diameter towards the current transmission mechanism; the contact is connected with the current transmission mechanism and used for cooperating with the inner cone sleeve; the electrically conductive fingers of different diameters are used for adapting to different models of the inner cone sleeve and leading the current into the current transmission mechanism, and the end of the current transmission mechanism away from the electrically conductive mechanism is connected with the wiring end of the loop resistance tester; a plurality of grooves of different diameters are arranged on the contact and arranged from small to large in diameter towards the current transmission mechanism, the electrically conductive fingers are spring fingers, the spring fingers are sleeved on the contact through the grooves and contact the inner wall conductor of the inner cone sleeve; the current transmission mechanism is detachably connected with an insulating mounting component, the insulating mounting component is fixedly connected with the base of the inner cone sleeve, and the electrically conductive mechanism and the current transmission mechanism are fixed with the inner cone sleeve.

2. The inner cone sleeve circuit resistance test device of claim 1, wherein, The current transmission mechanism includes a guide rod, the guide rod is detachably connected with the contact, and the insulating mounting component is detachably connected on the guide rod.

3. The inner cone sleeve circuit resistance test device of claim 2, wherein, The insulating mounting component is a circular insulating plate with a first internally threaded hole, an externally threaded hole is arranged on the guide rod, and the guide rod and the circular insulating plate are threadedly connected to enable the circular insulating plate to move along the length direction of the guide rod.

4. The inner cone sleeve circuit resistance test device of claim 3, wherein, A plurality of inner cone sleeve mounting holes of different specifications are arranged on the circular insulating plate, the inner cone sleeve mounting holes are used for fixing the bases of inner cone sleeves of different models with the circular insulating plate through screws, and the inner cone sleeve mounting holes of the same specification are evenly arranged on the circular insulating plate along the circumferential surface.

5. The inner cone sleeve circuit resistance test device of claim 4, wherein, The guide rod is a wedge-shaped guide rod, a wedge-shaped end is arranged at one end of the wedge-shaped guide rod, a wedge-shaped hole is arranged in the contact, the wedge-shaped end is wedge-shapedly connected with the wedge-shaped hole, a continuous externally threaded hole is arranged at the end of the wedge-shaped guide rod away from the wedge-shaped end, and the circular insulating plate is connected with the wedge-shaped guide rod through the continuous externally threaded hole.

6. The inner cone sleeve circuit resistance test device of claim 4, wherein, The guide rod is a threaded guide rod, an externally threaded end is arranged at one end of the threaded guide rod, a second internally threaded hole is arranged in the contact, the externally threaded end is threadedly connected with the second internally threaded hole, a plurality of fastening threads are arranged on the threaded guide rod, and the circular insulating plate is connected with the threaded guide rod through the plurality of fastening threads.

7. An inner cone sleeve circuit resistance test device according to claim 5 or 6, characterised in that, The current transmission mechanism further includes an L-shaped copper plate, a copper plate mounting hole is arranged on one side of the L-shaped copper plate, a third internally threaded hole is arranged at the end of the guide rod away from the contact, the copper plate mounting hole is connected with the third internally threaded hole on the guide rod through a screw, and the other side of the L-shaped copper plate is used for connecting the wiring end of the loop resistance tester.

8. A method for testing the resistance of an inner cone sleeve circuit, using the device for testing the resistance of an inner cone sleeve circuit according to any one of claims 1 to 7, characterized in that Firstly, the contact in the electrically conductive mechanism of the inner cone sleeve loop resistance testing device is inserted into the inner cone sleeve, so that the electrically conductive fingers in the electrically conductive mechanism contact the inner wall conductor of the inner cone sleeve, and the electrically conductive fingers input the current into the current transmission mechanism; then, the wiring end of the loop resistance tester is connected with the current transmission mechanism, and the inner cone sleeve loop resistance test is completed.

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