High-voltage cable joint connecting device for power-on test of transformer

Abstract

The invention relates to the technical field of transformer equipment, in particular to a transformer power-on test high-voltage cable connector connecting device which comprises a loading vehicle, transformer test equipment is fixedly installed at the top end of the loading vehicle, connecting equipment is fixedly installed at the top end of the loading vehicle, and a cable is inserted into the connecting equipment. The outer side of the cable is sleeved with a cable connector assembly. A cable is inserted between built-in clamping plates, one end of the cable abuts against one end of a contact rod, at the moment, a bolt is rotated through a screwdriver, a round block rotates in a first cable pipeline, and the bolt is meshed with a threaded sleeve through threads, so that the threaded sleeve moves downwards; at the moment, the clamping plates are meshed with the circular gear through the teeth through the first racks, and the two sets of clamping plates move in opposite directions and are matched with the supporting force of the fixed block and the telescopic rod, so that the two sets of clamping plates are matched with the rubber strip, the cable can be clamped and installed conveniently, and the cable installation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer equipment, in particular to a high-voltage cable joint connection device for transformer power-on test. Background Art

[0002] The rectifier transformer is the power transformer of the rectifier equipment. The characteristic of the rectifier equipment is that the primary side inputs AC, and the secondary side outputs DC after passing through the rectifier element. Current conversion is the general term for the three working modes of rectification, reverse current and frequency conversion. Rectification is the most widely used one. The transformer used as the power supply of the rectifier device is called a rectifier transformer. Most of the rectifier DC power supplies used in industry are obtained from the AC power grid through the rectifier transformer and the rectifier equipment.

[0003] However, the test equipment is large and heavy (1.5 meters in diameter, 7.2 meters in height, and a total mass of 14 tons), and cannot be transported as a whole (according to national highway transportation standards, the height of the whole vehicle cannot exceed 4 meters). The existing equipment needs to be assembled in advance before each test. Excluding the transportation time, the assembly time exceeds eight hours, while the actual test time is less than half an hour. Now the whole set of equipment needs to be concentrated on a three-axle truck, which saves the assembly time and shortens the preparation time before each test to less than 10 minutes. However, the problem caused by integrating it into a three-axle truck is that the connection between the existing rectifier transformer and the high-voltage cable is a rigid connection between the high-voltage bushing and the high-voltage cable directly through bolts. This type of connection method will affect the direction of the cable terminal, and the terminal contact surface and the high-voltage bushing connection surface cannot match normally, resulting in connection difficulties and difficult to ensure the connection quality. In addition, the installation and disassembly of the high-voltage cable requires four or more people to complete, which is time-consuming and labor-intensive. At the same time, the operating space is severely limited, and various cable joints cannot be disassembled at will. In addition, the cable voltage is 10kV, and the connection must be tight. If the connection is not tight, it is easy to heat up during the test, resulting in test data errors or even accidents. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a high-voltage cable connector connection device for transformer power-on test, which solves the problem that the connection between the existing rectifier transformer and the high-voltage cable is that the high-voltage bushing and the high-voltage cable are directly rigidly connected by bolts. This type of connection method will make the cable terminal affected by the direction of the cable, and the terminal contact surface and the high-voltage bushing connection surface cannot be properly matched, resulting in connection difficulties and difficulty in ensuring the connection quality. In addition, the installation and disassembly of the high-voltage cable requires four or more people, which is time-consuming and labor-intensive. At the same time, the operating space is severely limited, and various cable connectors cannot be disassembled at will. Moreover, the cable voltage is 10kV, and the connection must be tight. If the connection is not tight, it is easy to heat up during the test, resulting in test data errors and even accidents.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: The technical scheme adopted by the present invention to solve its technical problem is: a high-voltage cable connector connection device for transformer power-on test, including a loading vehicle, a transformer testing device is fixedly installed on the top of the loading vehicle, a connecting device is fixedly installed on the top of the loading vehicle, and a cable is inserted inside the connecting device, a cable connector assembly is sleeved on the outer side of the cable, and a connecting assembly is fixedly installed inside the cable connector assembly, an adjusting assembly is inserted inside the cable connector assembly, and a clamping assembly is fixedly installed on the bottom end of the adjusting assembly, a synchronization assembly is fixedly installed on the top of the clamping assembly, the cable, the adjusting assembly, the clamping assembly and the synchronization assembly are arranged in two groups and are symmetrically arranged with the central symmetry plane of the cable connector assembly, and a protective sleeve is sleeved on the outer side of the cable connector assembly; the connecting assembly includes a first fixing ring, and the first fixing ring is fixedly installed inside the cable connector assembly, a contact rod is fixedly installed inside the first fixing ring, and a second fixing ring is sleeved on the outer side of the contact rod, and the second fixing ring A contact sleeve is fixedly installed inside; the adjustment component includes a bolt, and the bolt is inserted into the interior of the cable connector assembly, a round block is fixedly installed on the outer side of the bolt, a rotation groove adapted to the round block is opened inside the cable connector assembly, a threaded sleeve is sleeved on the outer side of the bolt, and the threaded sleeve is meshed with the bolt through a thread; the clamping component includes a clamping plate, and the clamping plate is fixedly installed at the bottom end of the threaded sleeve, and the clamping plates are arranged in two groups and are distributed in an array with the central axis of the cable connector assembly, and rubber strips are arranged at equal distances inside the clamping plates; the synchronization component includes a fixed block, and the fixed block is fixedly installed inside the cable connector assembly, a telescopic rod is fixedly installed at the bottom end of the fixed block, and the telescopic rod is fixedly installed on the top of the clamping plate, a first rack is fixedly installed on one end of the clamping plate, and a second rack is fixedly installed on one end of the other group of clamping plates of the two groups of clamping plates, a fixed plate is fixedly installed inside the cable connector assembly, and a rotating shaft is inserted inside the fixed plate, and a circular gear is fixedly installed on one end of the rotating shaft, and the circular gear is meshed with the first rack and the second rack through teeth.

[0006] Preferably, the cable connector assembly includes a first cable conduit, and a connecting sleeve is inserted into the interior of the first cable conduit, a second cable conduit is fixedly installed on one end of the connecting sleeve, a limiting ring is fixedly installed on the outer side of the second cable conduit, and a threaded cap is sleeved on the outer side of the second cable conduit.

[0007] Preferably, a slide groove matched with the limiting ring is provided inside the threaded cap, and the threaded cap is meshed with the first cable conduit through threads.

[0008] Preferably, a groove matched with the connecting sleeve is provided inside the first cable conduit, and one end of the connecting sleeve is in an arc-shaped structure.

[0009] Preferably, an anti-leakage component is inserted inside the first fixing ring, and the anti-leakage component includes a collar, the collar is inserted inside the first fixing ring, and an insulator is fixedly installed on the outside of the collar.

[0010] Preferably, a snap-fit ​​assembly is provided inside the protective sleeve, and the snap-fit ​​assembly includes a guide groove, the guide groove is provided inside the protective sleeve, a connecting groove is provided inside the protective sleeve, a spring is fixedly installed inside the first cable conduit, and a clamping block is fixedly installed at the top of the spring.

[0011] Preferably, the guide groove and the connecting groove are in a through structure, the top end of the spring is in an inclined structure, and a groove matching the block is provided inside the connecting groove.

[0012] Preferably, an irregular groove is provided inside the contact rod, and one end of the cable is in conflict with the groove provided inside the contact rod.

[0013] Preferably, the rubber strip has an arc-shaped appearance, and a cross-section of the rubber strip has a honeycomb structure.

[0014] Preferably, anti-slip grooves are arranged at equal distances on the outer side of the protective sleeve, and the cross-section of the anti-slip grooves is an arc-shaped structure.

[0015] The beneficial effects of the present invention are:

[0016] (1) In the adjustment assembly of the present invention, a cable is inserted between the built-in clamping plates so that one end of the cable contacts one end of the contact rod. At this time, the bolt is turned by a screwdriver, and because the round block rotates inside the first cable duct, and the bolt and the threaded sleeve are meshed through the thread, the threaded sleeve moves downward. At this time, the clamping plates are meshed with the circular gear through the teeth of the first rack, so that the circular gear meshes and rotates with the second rack. At this time, the two groups of clamping plates move in opposite directions, and cooperate with the supporting force of the fixed block and the telescopic rod, so that the two groups of clamping plates cooperate with the rubber strip to facilitate the clamping and installation of the cable, thereby improving the efficiency of cable installation and the quality of installation connection, and making the cable and the contact rod tightly connected to prevent looseness between the cable and the contact rod.

[0017] (2) In the locking assembly of the present invention, a connecting groove is provided, and the protective sleeve is arranged on the outer side of the second cable duct and slides in the direction of the first cable duct, and the clamping block slides inside the guide groove. When the clamping block slides to the intersection of the guide groove and the connecting groove, since the outer side of the protective sleeve is provided with anti-slip grooves, it is convenient to use the friction between the staff and the protective sleeve to drive the protective sleeve to rotate on the outer side of the cable connector assembly. Through the elastic force of the spring, the clamping block is clamped in the groove opened inside the connecting groove, thereby improving the stability between the first cable duct and the second cable duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front perspective schematic diagram of the structure of the present invention; Figure 2 It is a front perspective schematic diagram of the structure of the connecting device and the protective sleeve of the present invention; Figure 3 It is a front cross-sectional schematic diagram of the structure of the cable and the protective cover of the present invention; Figure 4 It is a partial cross-sectional perspective schematic diagram of the structure of the cable and the protective cover of the present invention; Figure 5 It is a structural stereoscopic diagram of the bolt and the clamping plate of the present invention; Figure 6 It is an exploded stereoscopic schematic diagram of the structure of the first cable duct and the first fixing ring of the present invention; Figure 7 It is a partial cross-sectional rear perspective schematic diagram of the structure of the first cable duct and the protective sleeve of the present invention; Figure 8 For the present invention Figure 5 A magnified schematic diagram of structure A.

[0019] In the figure: 1. Loading vehicle; 2. Transformer testing equipment; 3. Connection equipment; 4. Cable; 5. Cable connector assembly; 510. First cable conduit; 520. Connecting sleeve; 530. Second cable conduit; 540. Limiting ring; 550. Threaded cap; 6. Connecting assembly; 610. First fixing ring; 620. Contact rod; 630. Second fixing ring; 640. Contact sleeve; 7. Adjusting assembly; 710. Bolt; 720. Round block; 730. Threaded sleeve; 8 , clamping assembly; 810, splint; 820, rubber strip; 9, synchronization assembly; 910, fixed block; 920, telescopic rod; 930, first rack; 940, second rack; 950, fixed plate; 960, rotating shaft; 970, circular gear; 10, anti-leakage assembly; 1010, collar; 1020, insulator; 11, protective cover; 12, locking assembly; 1210, guide groove; 1220, connecting groove; 1230, spring; 1240, clamping block. DETAILED DESCRIPTION

[0020] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] See also Figure 1-8A high-voltage cable joint connection device for transformer power-on test of the present invention comprises a loading vehicle 1, a transformer test device 2 is fixedly installed on the top of the loading vehicle 1, a connection device 3 is fixedly installed on the top of the loading vehicle 1, and a cable 4 is inserted inside the connection device 3, a cable joint assembly 5 is sleeved on the outside of the cable 4, and a connection assembly 6 is fixedly installed inside the cable joint assembly 5, an adjustment assembly 7 is inserted inside the cable joint assembly 5, and a clamping assembly 8 is fixedly installed on the bottom end of the adjustment assembly 7, and a synchronization assembly 9 is fixedly installed on the top of the clamping assembly 8, the cable 4, the adjustment assembly 7, the clamping assembly 8 and the synchronization assembly 9 are arranged in two groups and are symmetrically arranged with the central symmetry plane of the cable joint assembly 5, and a protective sleeve 11 is sleeved on the outside of the cable joint assembly 5; the connection assembly 6 comprises a first fixing ring 610, and the first fixing ring 610 is fixedly installed on Inside the cable connector assembly 5, a contact rod 620 is fixedly installed inside the first fixing ring 610, and a second fixing ring 630 is sleeved on the outer side of the contact rod 620, and a contact sleeve 640 is fixedly installed inside the second fixing ring 630; the adjustment assembly 7 includes a bolt 710, and the bolt 710 is inserted into the cable connector assembly 5, a round block 720 is fixedly installed on the outer side of the bolt 710, and a rotating groove matching the round block 720 is opened inside the cable connector assembly 5, a threaded sleeve 730 is sleeved on the outer side of the bolt 710, and the threaded sleeve 730 is meshed with the bolt 710 through threads; the clamping assembly 8 includes a splint 810, and the splint 810 is fixedly installed at the bottom end of the threaded sleeve 730, two groups of splints 810 are arranged and are distributed in an array with the central axis of the cable connector assembly 5, and rubber strips 820 are arranged at equal distances inside the splint 810.

[0022] The synchronization component 9 includes a fixed block 910, and the fixed block 910 is fixedly installed inside the cable connector component 5. A telescopic rod 920 is fixedly installed on the bottom end of the fixed block 910, and the telescopic rod 920 is fixedly installed on the top of the clamping plate 810. A first rack 930 is fixedly installed on one end of the clamping plate 810, and a second rack 940 is fixedly installed on one end of the other group of clamping plates 810 of the two groups of clamping plates 810. A fixed plate 950 is fixedly installed inside the cable connector component 5, and a rotating shaft 960 is inserted inside the fixed plate 950. A circular gear 970 is fixedly installed on one end of the rotating shaft 960. The circular gear 970 is meshed with the first rack 930 and the second rack 940 through teeth. This structure is set to insert the cable 4 between the built-in clamping plates 810 so that one end of the cable 4 is aligned with the contact rod 620. One end of the clamping plate 810 is in conflict with each other. At this moment, the bolt 710 is turned by a screwdriver, and because the round block 720 rotates inside the first cable duct 510, and the bolt 710 is meshed with the threaded sleeve 730 through the thread, the threaded sleeve 730 moves downward, and at this moment, the clamping plate 810 is meshed with the circular gear 970 through the teeth of the first rack 930, so that the circular gear 970 is meshed and rotated with the second rack 940. At this moment, the two groups of clamping plates 810 move in opposite directions, and cooperate with the supporting force of the fixed block 910 and the telescopic rod 920, so that the two groups of clamping plates 810 cooperate with the rubber strip 820 to facilitate the clamping and installation of the cable 4, thereby improving the efficiency of the installation of the cable 4 and the quality of the installation connection, and making the cable 4 and the contact rod 620 tightly connected to prevent looseness between the cable 4 and the contact rod 620.

[0023] Specifically, the cable connector assembly 5 includes a first cable duct 510, and a connecting sleeve 520 is inserted inside the first cable duct 510, a second cable duct 530 is fixedly installed at one end of the connecting sleeve 520, a limiting ring 540 is fixedly installed on the outside of the second cable duct 530, and a threaded cap 550 is sleeved on the outside of the second cable duct 530, a sliding groove adapted to the limiting ring 540 is provided inside the threaded cap 550, the threaded cap 550 is meshed with the first cable duct 510 through a thread, a groove adapted to the connecting sleeve 520 is provided inside the first cable duct 510, and one end of the connecting sleeve 520 is an arc-shaped structure, which is provided by setting a first A cable duct 510 is convenient for driving the connecting sleeve 520 through the arc surface of the second cable duct 530 to be inserted into the inside of the first cable duct 510, and the threaded cap 550 is limited by the limiting ring 540 so that the threaded cap 550 is engaged with the first cable duct 510 through threads, so that the first cable duct 510 and the second cable duct 530 are tightly connected, so that the second fixing ring 630 drives the contact sleeve 640 to be sleeved on the outside of the contact rod 620 and connected to the first fixing ring 610, and because the two groups of cables 4 are respectively in conflict with one end of the contact rod 620 and the contact sleeve 640, the connection tightness between the two groups of cables 4 is improved.

[0024] Specifically, an anti-leakage component 10 is inserted inside the first fixing ring 610, and the anti-leakage component 10 includes a collar 1010, which is inserted inside the first fixing ring 610, and an insulator 1020 is fixedly installed on the outside of the collar 1010. This structure is provided with the insulator 1020. At this moment, the collar 1010 is inserted inside the first fixing ring 610 and the second fixing ring 630. The collar 1010 plays a supporting role, so that the insulator 1020 covers the outside of the contact sleeve 640, thereby preventing the current between the contact rod 620 and the contact sleeve 640 from leaking out, thereby improving the safety of the device.

[0025] Specifically, the protective sleeve 11 is provided with a snap-fit ​​assembly 12, and the snap-fit ​​assembly 12 includes a guide groove 1210, the guide groove 1210 is provided inside the protective sleeve 11, a connecting groove 1220 is provided inside the protective sleeve 11, a spring 1230 is fixedly installed inside the first cable duct 510, and a clamping block 1240 is fixedly installed at the top of the spring 1230, the guide groove 1210 and the connecting groove 1220 are in a through structure, the top of the spring 1230 is in an inclined structure, and a spring 1230 is provided inside the connecting groove 1220 to match the clamping block 1240. Groove, this structure sets a connecting groove 1220, and the protective sleeve 11 is sleeved on the outside of the second cable duct 530 to slide in the direction of the first cable duct 510, and the clamping block 1240 slides inside the guide groove 1210. When the clamping block 1240 slides to the intersection of the guide groove 1210 and the connecting groove 1220, the protective sleeve 11 is then rotated, and the elastic force of the spring 1230 causes the clamping block 1240 to engage in the groove opened inside the connecting groove 1220, thereby improving the stability between the first cable duct 510 and the second cable duct 530.

[0026] Specifically, an irregular groove is provided inside the contact rod 620, and one end of the cable 4 is in conflict with the groove provided inside the contact rod 620. This structure increases the area where the wire of the cable 4 is connected to one end of the contact rod 620 by setting the contact rod 620, because the irregular groove is provided inside the contact rod 620, thereby improving the stability of the connection between the cable 4 and the contact rod 620.

[0027] Specifically, the rubber strip 820 has an arc-shaped structure, and the cross-section of the rubber strip 820 has a honeycomb structure. This structure is achieved by setting the rubber strip 820. Since the cross-section of the rubber strip 820 has a honeycomb structure, the rubber strip 820 has a certain ductility. When the two sets of plywood 810 squeeze the cable 4 through the rubber strip 820, the rubber strip 820 shrinks and wraps around the outside of the cable 4, thereby protecting the outside of the cable 4 and preventing the surface of the cable 4 from being squeezed and damaged, and increasing the friction force of the two sets of plywood 810 squeezing the cable 4, preventing the cable 4 from being subjected to external force and thus detaching from between the two sets of plywood 810.

[0028] Specifically, anti-skid grooves are arranged at equal distances on the outside of the protective sleeve 11, and the cross-section of the anti-skid grooves is an arc-shaped structure. This structure is achieved by setting the protective sleeve 11. Since the anti-skid grooves are arranged on the outside of the protective sleeve 11, it is convenient to use the friction between the staff and the protective sleeve 11 to drive the protective sleeve 11 to rotate on the outside of the cable connector assembly 5.

[0029] Working principle: stop the device in front of the transformer to be tested, insert two groups of cables 4 between the built-in clamping plates 810, so that one end of the cable 4 contacts one end of the contact rod 620. Since the contact rod 620 is provided with an irregular groove inside, the area where the wire of the cable 4 is connected to one end of the contact rod 620 is increased, thereby improving the stability of the connection between the cable 4 and the contact rod 620. At this time, the bolt 710 is turned by a screwdriver, and since the round block 720 rotates inside the first cable duct 510, and the bolt 710 is engaged with the threaded sleeve 730 through the thread, the threaded sleeve 730 moves downward, and at this time the clamping plate 810 passes through the first tooth The toothed bar 930 meshes with the circular gear 970, so that the circular gear 970 meshes and rotates with the second rack 940. At this moment, the two groups of clamping plates 810 move in opposite directions, and cooperate with the supporting force of the fixed block 910 and the telescopic rod 920, so that the two groups of clamping plates 810 cooperate with the rubber strip 820 to facilitate the clamping and installation of the cable 4, thereby improving the efficiency of the installation of the cable 4 and the quality of the installation connection, and making the cable 4 and the contact rod 620 tightly connected to prevent the cable 4 and the contact rod 620 from loosening. At this moment, the ring 1010 is inserted into the first fixing ring 610 and the second fixing ring 630, and the ring 1010 plays a supporting role. The insulator 1020 covers the outside of the contact sleeve 640, thereby preventing the current leakage between the contact rod 620 and the contact sleeve 640, thereby improving the safety of the device, and the second fixing ring 630 drives the contact sleeve 640 to be sleeved on the outside of the contact rod 620 and connected to the first fixing ring 610, and because the two groups of cables 4 are respectively in conflict with one end of the contact rod 620 and the contact sleeve 640, the connection tightness between the two groups of cables 4 is improved. Through the arc surface of the connecting sleeve 520, the second cable duct 530 drives the connecting sleeve 520 to be inserted into the inside of the first cable duct 510, and the threaded cap 550 is limited by the limiting ring 540, so that the threaded cap 550 is meshed with the first cable duct 510 through a thread, so that the first cable duct 510 and the second cable duct 530 are tightly connected to prevent falling off, and then the protective sleeve 11 is sleeved on the outside of the second cable duct 530 and slides toward the first cable duct 510, and the block 1240 slides inside the guide groove 1210. When the block 1240 slides to the intersection of the guide groove 1210 and the connecting groove 1220, the protective sleeve 11 is then rotated, and the elastic force of the spring 1230 causes the block 1240 to be engaged with the groove opened inside the connecting groove 1220, thereby improving the stability between the first cable duct 510 and the second cable duct 530.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high voltage cable joint connection device for transformer power-on test, characterized in that: The invention comprises a loading vehicle (1), wherein a transformer testing device (2) is fixedly mounted on the top of the loading vehicle (1), a connecting device (3) is fixedly mounted on the top of the loading vehicle (1), and a cable (4) is inserted into the connecting device (3), a cable connector assembly (5) is sleeved on the outer side of the cable (4), and a connecting assembly (6) is fixedly mounted inside the cable connector assembly (5), an adjusting assembly (7) is inserted into the inner side of the cable connector assembly (5), and a clamping assembly (8) is fixedly mounted on the bottom end of the adjusting assembly (7), and a synchronization assembly (9) is fixedly mounted on the top end of the clamping assembly (8), and the cable (4), the adjusting assembly (7), the clamping assembly (8) and the synchronization assembly (9) are provided in two groups in total and are symmetrically arranged with respect to the central symmetry plane of the cable connector assembly (5), and a protective sleeve (11) is sleeved on the outer side of the cable connector assembly (5); The connection assembly (6) comprises a first fixing ring (610), and the first fixing ring (610) is fixedly mounted inside the cable connector assembly (5), a contact rod (620) is fixedly mounted inside the first fixing ring (610), and a second fixing ring (630) is sleeved on the outer side of the contact rod (620), and a contact sleeve (640) is fixedly mounted inside the second fixing ring (630); The adjustment assembly (7) comprises a bolt (710), and the bolt (710) is inserted into the interior of the cable connector assembly (5); a round block (720) is fixedly mounted on the outer side of the bolt (710); a rotation groove matching the round block (720) is provided inside the cable connector assembly (5); a threaded sleeve (730) is sleeved on the outer side of the bolt (710), and the threaded sleeve (730) is meshed with the bolt (710) through a thread.

2. A transformer power-on test high-voltage cable joint connection device according to claim 1, characterized in that: The clamping assembly (8) comprises a clamping plate (810), and the clamping plate (810) is fixedly mounted on the bottom end of the threaded sleeve (730), two groups of the clamping plates (810) are provided and are distributed in an array around the central axis of the cable connector assembly (5), and rubber strips (820) are equidistantly arranged inside the clamping plates (810); The synchronization component (9) comprises a fixed block (910), and the fixed block (910) is fixedly mounted inside the cable connector component (5); a telescopic rod (920) is fixedly mounted on the bottom end of the fixed block (910), and the telescopic rod (920) is fixedly mounted on the top end of a clamping plate (810); a first rack (930) is fixedly mounted on one end of the clamping plate (810); a second rack (940) is fixedly mounted on one end of another set of clamping plates (810) of the two sets of clamping plates (810); a fixed plate (950) is fixedly mounted inside the cable connector component (5), and a rotating shaft (960) is inserted inside the fixed plate (950); a circular gear (970) is fixedly mounted on one end of the rotating shaft (960), and the circular gear (970) is meshed with the first rack (930) and the second rack (940) through teeth.

3. A transformer power-on test high-voltage cable joint connection device according to claim 2, characterized in that: The cable joint assembly (5) comprises a first cable duct (510), wherein a connecting sleeve (520) is inserted into the interior of the first cable duct (510), a second cable duct (530) is fixedly installed at one end of the connecting sleeve (520), a limiting ring (540) is fixedly installed on the outside of the second cable duct (530), and a threaded cap (550) is sleeved on the outside of the second cable duct (530).

4. A transformer power-on test high-voltage cable joint connection device according to claim 3, characterized in that: A sliding groove matching the limiting ring (540) is provided inside the threaded cap (550), and the threaded cap (550) is meshed with the first cable conduit (510) via threads.

5. A transformer power-on test high-voltage cable joint connection device according to claim 3, characterized in that: A groove matching the connecting sleeve (520) is provided inside the first cable duct (510), and one end of the connecting sleeve (520) is in an arc-shaped structure.

6. A transformer power-on test high-voltage cable joint connection device according to claim 5, characterized in that: An anti-leakage component (10) is inserted inside the first fixing ring (610), and the anti-leakage component (10) comprises a collar (1010), the collar (1010) is inserted inside the first fixing ring (610), and an insulator (1020) is fixedly mounted on the outside of the collar (1010).

7. A transformer power-on test high-voltage cable joint connection device according to claim 3, characterized in that: A snap-fit ​​assembly (12) is provided inside the protective sleeve (11), and the snap-fit ​​assembly (12) comprises a guide groove (1210), the guide groove (1210) is provided inside the protective sleeve (11), a connecting groove (1220) is provided inside the protective sleeve (11), a spring (1230) is fixedly installed inside the first cable duct (510), and a clamping block (1240) is fixedly installed at the top end of the spring (1230).

8. A transformer power-on test high-voltage cable joint connection device according to claim 7, characterized in that: The guide groove (1210) and the connecting groove (1220) are of a through structure, the top end of the spring (1230) is of an inclined structure, and a groove matching the clamping block (1240) is provided inside the connecting groove (1220).

9. A transformer power-on test high-voltage cable joint connection device according to claim 2, characterized in that: An irregular groove is provided inside the contact rod (620), and one end of the cable (4) is in contact with the groove provided inside the contact rod (620).

10. A transformer power-on test high-voltage cable joint connection device according to claim 2, characterized in that: The outer shape of the rubber strip (820) is an arc-shaped structure, and the cross-section of the rubber strip (820) is a honeycomb structure.

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