A cable terminal and GIS device capable of conducting efficient pressure test

Abstract

The application relates to the field of high-voltage cable terminal test, in particular to a cable terminal and GIS equipment capable of carrying out efficient withstand voltage test, which comprises a three-phase connecting pipe and a connecting device; the three-phase connecting pipe is internally provided with a sealed cavity, and three groups of static contacts are arranged in the cavity; the connecting device comprises a main shaft, a mounting frame and a rotating handle; one end of the main shaft extends to the inside of the cavity from the outside of the three-phase connecting pipe and is rotationally connected with the inner wall of the three-phase connecting pipe, and the other end of the main shaft is connected with the rotating handle; the three groups of static contacts are symmetrically distributed about the axis center of the main shaft; the mounting frame is sleeved on the main shaft and is located in the cavity, and the mounting frame is provided with a movable contact which can be plugged with the static contact. The application realizes quick adjustment of the connection of the electric circuit between different components of GIS, and solves the problem that the existing cable terminal still needs to be disassembled and inflated and deflated during the withstand voltage test.

Description

Technical Field

[0001] This invention relates to the field of high-voltage cable terminal testing, specifically to a cable terminal and GIS equipment capable of performing efficient withstand voltage tests. Background Technology

[0002] Because GIS equipment is a fully sealed product filled with high-pressure SF6 gas, the SF6 gas must be recovered before opening the gas chamber for maintenance. After maintenance, the gas chamber needs to be cleaned, sealed, and vacuumed. After vacuuming, it needs to be refilled with high-pressure SF6 gas. The entire process is complex and time-consuming. Furthermore, SF6 gas is one of the six major greenhouse gases, and the gas produced after discharge is harmful to human health and causes significant pollution.

[0003] To address this issue, Chinese Patent CN108828415B discloses GIS equipment, a GIS cable terminal connection device, and a withstand voltage test method thereof. When conducting withstand voltage tests on GIS switchgear, it is not necessary to disassemble the GIS connecting conductor. Instead, the GIS cylinder and cable terminal cylinder are separated, and the GIS connecting conductor and cable terminal are disconnected. Then, the withstand voltage test equipment is connected to the GIS withstand voltage test port of the GIS cylinder, allowing the withstand voltage test end of the equipment to be connected to the GIS connecting conductor. Furthermore, during the withstand voltage test, only SF6 gas needs to be filled into the GIS cylinder, saving SF6 gas consumption and solving the problem of SF6 gas waste during withstand voltage tests on GIS equipment in existing technologies.

[0004] However, when conducting the pressure test, it is still necessary to disassemble the cylinder and then disconnect and reconnect the conductors, which is still quite complicated. Even though the waste of SF6 gas is reduced, the gas filling operation is still required. Summary of the Invention

[0005] To address the aforementioned issues, a cable terminal capable of performing efficient withstand voltage tests is provided. By employing a three-way connector, a stationary contact, and a connecting device, the existing cable terminals still require disassembly, assembly, and inflation / deflation of the cylinder during withstand voltage testing.

[0006] To address the problems of existing technologies, this invention provides a cable terminal capable of performing efficient withstand voltage tests, comprising a three-way connector and a connecting device; the three-way connector has a sealed cavity with three sets of stationary contacts inside; the connecting device includes a main shaft, a mounting bracket, and a rotating handle; one end of the main shaft extends from the outside of the three-way connector through its outer wall into the cavity and is rotatably connected to the inner wall of the three-way connector, and the other end of the main shaft is connected to the rotating handle; the three sets of stationary contacts are symmetrically distributed about the axis of the main shaft; the mounting bracket is sleeved on the main shaft and located within the cavity, and the mounting bracket is equipped with two sets of moving contacts that can be inserted and engaged with the stationary contacts; when the main shaft is rotated, the main shaft drives the mounting bracket and the moving contacts mounted on the mounting bracket to rotate synchronously, and the two sets of moving contacts can respectively insert and engage with two different stationary contacts.

[0007] Preferably, the three-connector pipe is further provided with a plug-in control device, which includes an elastic support assembly and a locking assembly; the moving contact is slidably mounted on the mounting bracket, and the moving contact includes a straight section and an arc-shaped end, with the arc-shaped end located at the end of the moving contact away from the main shaft; a sliding groove is provided on the mounting bracket, and a protrusion is provided on the moving contact to slide in cooperation with the sliding groove; the elastic support assembly includes a first elastic element, and the two ends of the first elastic element are respectively connected to the mounting bracket and the moving contact; the locking assembly is provided on the stationary contact and is used to fix the moving contact; the mounting bracket is provided with an auxiliary control device for controlling the opening and closing of the locking assembly.

[0008] Preferably, the locking assembly includes a first bracket, a locking block, and a second elastic member; the first bracket is disposed on the stationary contact; the locking block is mounted on the first bracket and slides with the stationary contact; the two ends of the second elastic member are respectively connected to the first bracket and the stationary contact; a through hole is provided on the moving contact, and the locking block can be inserted into the through hole when the moving contact and the stationary contact are engaged.

[0009] Preferably, the auxiliary control device includes an intermittent control component and a rotary control component; the intermittent control component includes a rotating shaft, a control disk, and a latch; the rotating shaft is rotatably mounted on a mounting bracket; the control disk is sleeved on the rotating shaft, and the control disk has a slot that mates with the latch; the latch is mounted on a first bracket; the rotary control component is disposed on the mounting bracket and is used to control the rotation of the rotating shaft.

[0010] Preferably, the rotation control assembly includes a rack, a rotating gear, a mounting ring, a ratchet, and a stop pawl; the rack is slidably mounted on the mounting bracket; the rotating gear is rotatably mounted on the mounting bracket with its axis collinear with the axis of the rotating shaft, and the rotating gear is meshed with the rack for transmission; the mounting ring is mounted on the rotating gear; the ratchet is sleeved on the rotating shaft; the stop pawl is mounted on the mounting ring and is meshed with the ratchet for transmission; the mounting bracket is also provided with a sliding control device for controlling the sliding of the rack.

[0011] Preferably, the sliding control device includes a second bracket, a third bracket, and a first transmission assembly; the second bracket is slidably mounted on the mounting frame, and the rack is connected to the second bracket; a first groove is provided on the second bracket, and a first transition section is provided on the side of the first groove near the main shaft; a third elastic element is mounted on the second bracket, and the two ends of the third elastic element are respectively connected to the second bracket and the mounting frame; the third bracket is slidably mounted on the mounting frame and is connected to the protrusion on the moving contact; a mating block is provided on the third bracket; the mounting frame is also provided with a movement control assembly for controlling the movement of the moving contact; when the moving contact moves toward the direction closer to the main shaft axis, the mating block slides along the first transition section and pushes the second bracket to move.

[0012] Preferably, the stationary contact has a mating groove, the bottom of which is arc-shaped. When the moving contact and the stationary contact are plugged in and the arc-shaped end of the moving contact abuts against the bottom of the mating groove, the straight section of the moving contact is located in the mating groove, and the main shaft cannot rotate. When the moving contact and the stationary contact are plugged in and only the arc-shaped end of the moving contact is located in the mating groove, there is a gap between the arc-shaped end of the moving contact and the bottom of the mating groove. Rotating the main shaft will compress the first elastic element and separate the moving contact from the stationary contact.

[0013] Preferably, the motion control assembly includes a connecting frame, a fourth elastic element, a fourth bracket, a fixed shaft, and a guide bracket; the main shaft is slidably fitted with the three connecting pipes; the connecting frame is sleeved on the main shaft and slidably fitted with the main shaft, and when the main shaft rotates, it will drive the connecting frame to rotate synchronously; the two ends of the fourth elastic element abut against the connecting frame and the mounting frame respectively; the fourth bracket is mounted on the connecting frame; the fixed shaft is set on the third bracket; the guide bracket is set on the fourth bracket and slidably fitted with the fixed shaft.

[0014] Preferably, the second bracket is further provided with a second groove, and a second transition section is provided on the side of the second groove near the main shaft axis.

[0015] Preferably, the second bracket has an inclined groove; the docking block is slidably mounted on the third bracket.

[0016] The present invention also protects a GIS device having a cable terminal capable of performing an efficient withstand voltage test as described above.

[0017] The advantages of this invention compared to the prior art are:

[0018] 1. This invention achieves rapid adjustment of the electrical circuit connection between different components of GIS through a three-connection pipe, a stationary contact, and a connecting device, enabling the completion of the withstand voltage test of GIS and cables without opening the GIS body. This solves the problem that existing cable terminals still require disassembly, assembly, and inflation / deflation of the cylinder during withstand voltage testing.

[0019] 2. This invention achieves the function of controlling the insertion and engagement of the moving contact and the stationary contact through the elastic support component and the locking component, thereby achieving the effect of quickly controlling the connection between the stationary contact and the moving contact. At the same time, the locking component fixes the moving contact, enabling the moving contact to maintain a stable connection with the stationary contact for a long period of time.

[0020] 3. The present invention achieves the function of fixing the moving contact through the first bracket, the locking block, the second elastic element and the through hole. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a cable terminal capable of performing efficient withstand voltage tests.

[0022] Figure 2 This is a three-dimensional schematic diagram of the internal structure of a three-way connector in a cable terminal capable of performing efficient withstand voltage tests.

[0023] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0024] Figure 4 This is a three-dimensional schematic diagram of the spindle and mounting bracket in a cable terminal capable of performing efficient withstand voltage tests.

[0025] Figure 5 yes Figure 4 A magnified view of a portion of point B in the middle.

[0026] Figure 6 This is a three-dimensional schematic diagram of the moving and stationary contacts in a cable terminal capable of performing efficient withstand voltage tests.

[0027] Figure 7 This is a three-dimensional exploded view of the moving and stationary contacts in a cable terminal capable of performing efficient withstand voltage tests.

[0028] Figure 8 yes Figure 7 A magnified view of a portion of point C.

[0029] Figure 9 This is a three-dimensional exploded view of an auxiliary control device in a cable terminal capable of performing efficient withstand voltage tests.

[0030] Figure 10 yes Figure 9 A magnified view of a portion of point D.

[0031] Figure 11 yes Figure 9 A magnified view of a portion of point E in the middle.

[0032] Figure 12This is a three-dimensional schematic diagram of the spindle, mounting bracket, and sliding control device in a cable terminal capable of performing efficient withstand voltage tests.

[0033] Figure 13 This is a cross-sectional schematic diagram of the movement and stationary contacts in a cable terminal capable of performing efficient withstand voltage tests.

[0034] Figure 14 This is a three-dimensional exploded view of a sliding control device in a cable terminal capable of performing efficient withstand voltage tests.

[0035] Figure 15 yes Figure 14 A magnified view of a portion of point F in the middle.

[0036] The diagram is labeled as follows: 1-Three-way connecting pipe; 11-Stationary contact; 111-Matching groove; 2-Connecting device; 21-Main shaft; 22-Mounting bracket; 221-Moving contact; 2211-Arc-shaped end; 23-Rotating handle; 3-Plug-in control device; 31-Elastic support assembly; 311-First elastic element; 312-Slide groove; 313-Protrusion; 32-Locking assembly; 321-First bracket; 322-Locking block; 323-Second elastic element; 324-Through hole; 4-Auxiliary control device; 41-Intermittent control assembly; 411-Rotating shaft; 412-Control panel; 4121-Slot; 413- 42-Latch; 421-Rotation control assembly; 422-Rotation gear; 423-Mounting ring; 424-Ratchet; 425-Stop ratchet; 5-Sliding control device; 51-Second bracket; 511-First groove; 512-First transition section; 513-Third elastic element; 514-Second groove; 515-Second transition section; 516-Inclined groove; 52-Third bracket; 521-Matching block; 522-Fifth elastic element; 53-Movement control assembly; 531-Connecting frame; 532-Fourth elastic element; 533-Fourth bracket; 534-Fixed shaft; 535-Guide bracket. Detailed Implementation

[0037] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0038] Reference Figures 1-4A cable terminal capable of performing high-efficiency withstand voltage tests includes a three-way connector 1 and a connecting device 2. The three-way connector 1 has a sealed cavity with three sets of stationary contacts 11 inside. The connecting device 2 includes a spindle 21, a mounting bracket 22, and a rotating handle 23. One end of the spindle 21 extends from the outside of the three-way connector 1 through its outer wall into the cavity and is rotatably connected to the inner wall of the three-way connector 1. The other end of the spindle 21 is connected to the rotating handle 23. Three sets of stationary contacts 11 are symmetrically distributed about the axis of the main shaft 21; the mounting bracket 22 is sleeved on the main shaft 21 and is located in the cavity, and the mounting bracket 22 is equipped with moving contacts 221 that can be inserted and cooperate with the stationary contacts 11, and there are two sets of moving contacts 221; when the main shaft 21 is rotated, the main shaft 21 will drive the mounting bracket 22 and the moving contacts 221 installed on the mounting bracket 22 to rotate synchronously, and the two sets of moving contacts 221 can be inserted and cooperate with two different stationary contacts 11 respectively.

[0039] The three sets of stationary contacts 11 are the cable-side stationary contact 11, the GIS-side stationary contact 11, and the bushing-side stationary contact 11.

[0040] This invention achieves rapid adjustment of the electrical circuit connection between different components of the GIS through a three-connector pipe 1, a stationary contact 11, and a connecting device 2. It enables the GIS and cable to complete the withstand voltage test without opening the GIS body, thus solving the problem that existing cable terminals still require disassembly, assembly, and inflation / deflation of the cylinder during withstand voltage testing. When the two sets of moving contacts 221 are connected to the cable-side stationary contact 11 and the GIS-side stationary contact 11 respectively, the cable terminal is in normal operating condition. During the withstand voltage test, the operator holds the rotating handle 23 and rotates it. The rotating handle 23 drives the main shaft 21 and the mounting bracket 22 mounted on the main shaft 21 to rotate. The mounting bracket 22 drives the two sets of moving contacts 221 mounted on it to rotate until the two sets of moving contacts 221 are respectively engaged with the GIS-side stationary contact 11 and the bushing-side stationary contact 11. At this time, the GIS power frequency withstand voltage condition is in operation. Similarly, the operator continues to rotate the rotating handle 23 until the two sets of moving contacts 221 are respectively engaged with the cable-side stationary contact 11 and the bushing-side stationary contact 11. At this time, the power cable withstand voltage test condition is performed. The switching between the three states of GIS normal operation, GIS withstand voltage test, and power cable withstand voltage test is more convenient and faster than existing technologies.

[0041] Reference Figures 2-6The three-way connector 1 is also equipped with a plug-in control device 3, which includes an elastic support component 31 and a locking component 32. The moving contact 221 is slidably mounted on the mounting bracket 22. The moving contact 221 includes a straight section and an arc-shaped end 2211, with the arc-shaped end 2211 located at the end of the moving contact 221 away from the main shaft 21. The mounting bracket 22 is provided with a sliding groove 312, and the moving contact 221 is provided with a protrusion 313 that slides with the sliding groove 312. The elastic support component 31 includes a first elastic element 311, with both ends of the first elastic element 311 connected to the mounting bracket 22 and the moving contact 221, respectively. The locking component 32 is provided on the stationary contact 11 and is used to fix the moving contact 221. The mounting bracket 22 is provided with an auxiliary control device 4 for controlling the opening and closing of the locking component 32.

[0042] The movement range of the moving contact 221 is limited by the cooperation between the protrusion 313 and the slide 312, while the movement trajectory of the moving contact 221 is guided.

[0043] The present invention realizes the function of controlling the insertion and engagement of the moving contact 221 and the stationary contact 11 through the elastic support component 31 and the locking component 32, thereby achieving the effect of quickly controlling the connection between the stationary contact 11 and the moving contact 221. At the same time, the locking component 32 fixes the moving contact 221, so that the moving contact 221 can be stably connected to the stationary contact 11 for a long time. When the main shaft 21 rotates, the locking assembly 32 first releases the fixation of the moving contact 221 by the auxiliary control device 4. The main shaft 21 drives the mounting bracket 22 and the moving contact 221 to rotate. The arc-shaped end 2211 of the moving contact 221 is squeezed against the stationary contact 11, the first elastic element 311 contracts, and the moving contact 221 slides along the slide groove 312, thereby causing the moving contact 221 and the stationary contact 11 to share the force. As it rotates, when the moving contact 221 reaches the next stationary contact 11, its arc-shaped end 2211 is squeezed again, the first elastic element 311 contracts until it is engaged with the stationary contact 11, the first elastic element 311 resets, and then the locking assembly 32 fixes the moving contact 221 again, completing the change of working conditions.

[0044] Reference Figures 6-8 The locking assembly 32 includes a first bracket 321, a locking block 322, and a second elastic member 323. The first bracket 321 is disposed on the stationary contact 11. The locking block 322 is mounted on the first bracket 321 and slides with the stationary contact 11. The two ends of the second elastic member 323 are respectively connected to the first bracket 321 and the stationary contact 11. A through hole 324 is provided on the moving contact 221. When the moving contact 221 is inserted and engaged with the stationary contact 11, the locking block 322 can be inserted and engaged with the through hole 324.

[0045] The present invention achieves the function of fixing the moving contact 221 through the first bracket 321, the locking block 322, the second elastic element 323 and the through hole 324. The operator first controls the first bracket 321 to move away from the moving contact 221 via the auxiliary control device 4, thereby overcoming the elastic force of the second elastic element 323 and driving the locking block 322 away from the through hole 324 until the locking block 322 separates from the through hole 324, releasing the locking assembly 32 from fixing the moving contact 221. The main shaft 21 drives the mounting bracket 22 and the moving contact 221 to rotate, and the arc-shaped end 2211 of the moving contact 221 is squeezed against the stationary contact 11. The first elastic element 311 contracts, and the moving contact 221 slides along the slide groove 312, thereby causing the moving contact 221 and the stationary contact 11 to share the force. As the rotation continues, when the moving contact 221 reaches the next stationary contact 11, its arc-shaped end 2211 is squeezed again, and the first elastic element 311 contracts until it is engaged with the stationary contact 11. The first elastic element 311 resets, and then the moving contact 221 is fixed by the locking assembly 32 to complete the change of working conditions.

[0046] Reference Figures 6-9 The auxiliary control device 4 includes an intermittent control component 41 and a rotation control component 42. The intermittent control component 41 includes a rotating shaft 411, a control disk 412, and a latch 413. The rotating shaft 411 is rotatably mounted on the mounting bracket 22. The control disk 412 is sleeved on the rotating shaft 411, and the control disk 412 has a slot 4121 that cooperates with the latch 413. The latch 413 is mounted on the first bracket 321. The rotation control component 42 is disposed on the mounting bracket 22 and is used to control the rotation of the rotating shaft 411.

[0047] This invention achieves the function of controlling the opening and closing of the locking assembly 32 through a rotating shaft 411, a control disk 412, a latch 413, and a rotation control component 42. During operation transitions, the operator first controls the rotating shaft 411 to rotate via the rotation control component 42. The rotating shaft 411 drives the control disk 412 to rotate, causing the latch 4121 on the control disk 412 to separate from the latch 413. Then, the pressure from the control disk 412 overcomes the elastic force of the second elastic element 323, pushing the latch 413 upwards. This controls the first bracket 321 to move away from the moving contact 221 until the locking block 322 separates from the through hole 324, releasing the locking assembly 32 from the moving contact 221. The main shaft 21 then drives the mounting bracket 22 and the moving contact 221 to rotate. The arc-shaped end 2211 of the moving contact 221 is pressed against the stationary contact 11, causing the first elastic element 311 to contract. 1. Slide along the slide groove 312, thereby causing the moving contact 221 and the stationary contact 11 to share the force. As it rotates, when the moving contact 221 reaches the next stationary contact 11, its arc-shaped end 2211 is squeezed again, and the first elastic element 311 contracts until it is engaged with the stationary contact 11. The first elastic element 311 resets, and then the rotating control component 42 controls the rotating shaft 411 to rotate, so that the slot 4121 on the control disk 412 rotates again to the latch 413, no longer restricting the movement of the first support 321. The first support 321 resets under the elastic force of the second elastic element 323, thereby driving the locking block 322 to move down and engage with the through hole 324 on the moving contact 221, restricting the movement of the moving contact 221.

[0048] Reference Figure 6 , Figure 9 and Figure 10 The rotation control assembly 42 includes a rack 421, a rotating gear 422, a mounting ring 423, a ratchet 424, and a stop pawl 425. The rack 421 is slidably mounted on the mounting bracket 22. The rotating gear 422 is rotatably mounted on the mounting bracket 22, and its axis is collinear with the axis of the rotating shaft 411. The rotating gear 422 is meshed with the rack 421 for transmission. The mounting ring 423 is mounted on the rotating gear 422. The ratchet 424 is sleeved on the rotating shaft 411. The stop pawl 425 is mounted on the mounting ring 423 and is meshed with the ratchet 424 for transmission. The mounting bracket 22 is also provided with a sliding control device 5 for controlling the sliding of the rack 421.

[0049] This invention achieves the function of controlling the rotation of the rotating shaft 411 through a rack 421, a rotating gear 422, a mounting ring 423, a ratchet 424, a stop pawl 425, and a sliding control device 5. During operation switching, the operator first controls the rack 421 to move via the sliding control device 5. The rack 421 drives the rotating gear 422, which is connected to it, to rotate. The rotating gear 422 drives the mounting ring 423 and the stop pawl 425 to rotate. The stop pawl 425 drives the ratchet 424 to rotate, thereby controlling the rotation of the rotating shaft 411. The rotating shaft 411 drives the control disk 412 to rotate, causing the slot 4121 on the control disk 412 to separate from the latch 413. Then, the pressure from the control disk 412 overcomes the elastic force of the second elastic element 323, pushing the latch 413 upwards, thus controlling the rotation of the shaft. The first bracket 321 moves away from the moving contact 221 until the locking block 322 separates from the through hole 324, releasing the locking assembly 32 from fixing the moving contact 221. After the moving contact 221 moves, the rack 421 is controlled to slide again until the slot 4121 on the control disk 412 rotates back to the latch 413, no longer restricting the movement of the first bracket 321. The first bracket 321 resets under the elastic force of the second elastic element 323, thereby driving the locking block 322 to move down and engage with the through hole 324 on the moving contact 221, restricting the movement of the moving contact 221. Through the unidirectional transmission connection of the ratchet 424 and the stop ratchet 425, the rack 421 does not drive the rotating shaft 411 to rotate in the opposite direction when resetting, which can shorten the stroke of the rack 421 and drive the control disk 412 to rotate in the same direction, achieving the effect of periodically controlling the opening and closing of the locking assembly 32.

[0050] Reference Figure 7 , Figure 9 and Figure 10 The sliding control device 5 includes a second bracket 51, a third bracket 52, and a first transmission assembly. The second bracket 51 is slidably mounted on the mounting frame 22, and the rack 421 is connected to the second bracket 51. A first groove 511 is provided on the second bracket 51, and a first transition section 512 is provided on the side of the first groove 511 near the main shaft 21. A third elastic element 513 is mounted on the second bracket 51, and the two ends of the third elastic element 513 are respectively connected to the second bracket 51 and the mounting frame 22. The third bracket 52 is slidably mounted on the mounting frame 22 and is connected to the protrusion 313 on the moving contact 221. A docking block 521 is provided on the third bracket 52. The mounting frame 22 is also provided with a movement control assembly 53 for controlling the movement of the moving contact 221. When the moving contact 221 moves toward the axis of the main shaft 21, the docking block 521 slides along the first transition section 512 and pushes the second bracket 51 to move.

[0051] This invention achieves the function of controlling the movement of the rack 421 through the second support 51, the third support 52, and the movement control component 53. During the change of working conditions, the operator first uses the movement control component 53 to overcome the elastic force of the first elastic element 311, controlling the moving contact 221 to slide towards the axis of the main shaft 21. The moving contact 221 drives the third support 52 to move, and the third support 52 drives the docking block 521 to move synchronously. The docking block 521 is provided with an inclined surface parallel to the first transition section 512. During the sliding process, it overcomes the elastic force of the third elastic element 513 to push the second support 51 to move. The second support 51 drives the rack 421 to move, and the rack 421 drives the rotating gear 422 connected to it to rotate. The rotating gear 422 drives the mounting ring 423 and the stop pawl 425 to rotate. The stop pawl 425 drives the ratchet 424 to rotate, which in turn controls the rotating shaft 411 to rotate. The rotating shaft 411 drives the control disk 412 to rotate, causing the slot 4121 on the control disk 412 to separate from the latch 413. Then, the pressure of the control disk 412 overcomes the elastic force of the second elastic element 323, pushing the latch 413 upward. This controls the first bracket 321 to move away from the moving contact 221 until the locking block 322 separates from the through hole 324, releasing the locking assembly 32 from fixing the moving contact 221.

[0052] Reference Figure 13 The stationary contact 11 has a mating groove 111, the bottom end of which is arc-shaped. When the moving contact 221 is inserted into the stationary contact 11 and the arc-shaped end 2211 of the moving contact 221 abuts against the bottom end of the mating groove 111, the straight section of the moving contact 221 is located in the mating groove 111, and the main shaft 21 cannot rotate. When the moving contact 221 is inserted into the stationary contact 11 and only the arc-shaped end 2211 of the moving contact 221 is located in the mating groove 111, there is a gap between the arc-shaped end 2211 of the moving contact 221 and the bottom end of the mating groove 111. Rotating the main shaft 21 will compress the first elastic element 311 and separate the moving contact 221 from the stationary contact 11.

[0053] This invention achieves the function of fixing the moving contact 221 by engaging the mating groove 111 with the arc-shaped end 2211 of the moving contact 221. When the arc-shaped end 2211 of the moving contact 221 engages with the bottom end of the mating groove 111, the engagement between the mating groove 111 and the straight section restricts the movement of the moving contact 221, preventing the moving contact 221 from separating from the stationary contact. When the straight section of the moving contact 221 is completely outside the mating groove 111, and only the arc-shaped end 2211 is inside the mating groove 111, the rotating spindle 21 compresses the first elastic element 311, and the moving contact 221 is in a free state, allowing it to separate from the stationary contact 11.

[0054] Reference Figure 6 , Figure 7 and Figure 12The motion control assembly 53 includes a connecting frame 531, a fourth elastic element 532, a fourth bracket 533, a fixed shaft 534, and a guide bracket 535. The main shaft 21 is slidably engaged with the three connecting pipes 1. The connecting frame 531 is sleeved on the main shaft 21 and is slidably engaged with the main shaft 21. When the main shaft 21 rotates, it will drive the connecting frame 531 to rotate synchronously. The two ends of the fourth elastic element 532 abut against the connecting frame 531 and the mounting frame 22, respectively. The fourth bracket 533 is mounted on the connecting frame 531. The fixed shaft 534 is set on the third bracket 52. The guide bracket 535 is set on the fourth bracket 533 and is slidably engaged with the fixed shaft 534.

[0055] This invention achieves the effect of controlling the state of the moving contact 221 through the connecting frame 531, the fourth elastic element 532, the fourth bracket 533, the fixed shaft 534, and the guide bracket 535. During the change of operating conditions, the operator first grasps the rotating handle 23, then lifts the rotating handle 23. The rotating handle 23 drives the main shaft 21 to slide, thereby overcoming the elastic force of the fourth elastic element 532 and driving the connecting frame 531 to move upwards. The connecting frame 531 drives the fourth bracket 533 and the guide bracket 535 to move, which in turn pushes the fixed shaft 534 through the guide bracket 535, causing the moving contact 221 to move towards the axis of the main shaft 21. The moving contact 221 drives the third bracket 52 to move, and the third bracket 52 drives the mating block 521 to move synchronously. The mating block 521 is provided with an inclined surface parallel to the first transition section 512, which overcomes the elastic force of the third elastic element 513 during the sliding process and pushes the second bracket 51 to move. The second bracket 51 drives the rack 421 to move, the rack 421 drives the rotating gear 422 connected to it to rotate, the rotating gear 422 drives the mounting ring 423 and the stop pawl 425 to rotate, the stop pawl 425 drives the ratchet 424 to rotate, thereby controlling the rotating shaft 411 to rotate, the rotating shaft 411 drives the control disk 412 to rotate, so that the slot 4121 on the control disk 412 separates from the latch 413, and then the pressure of the control disk 412 overcomes the elastic force of the second elastic element 323, pushing the latch 413 upward, controlling the first bracket 321 to move away from the moving contact 221 until the locking block 322 separates from the through hole 324, releasing the locking assembly 32 from fixing the moving contact 221. By moving the main shaft 21 upward, so that the straight section of the moving contact 221 is completely outside the mating groove 111 and only the arc-shaped end 2211 is inside the mating groove 111, rotating the main shaft 21 will compress the first elastic element 311. At the same time, the locking assembly 32 will release the fixation of the moving contact 221, thereby freeing the moving contact 221 and enabling it to separate from the stationary contact 11.

[0056] Reference Figures 9-11 The second bracket 51 is also provided with a second groove 514, and a second transition section 515 is provided on the side of the second groove 514 near the axis of the main shaft 21.

[0057] This invention achieves the function of automatically driving the control disk 412 to rotate when the moving contact 221 separates from the stationary contact 11 through the second groove 514 and the second transition section 515. During the change of operating conditions, the operator first moves the rotating handle 23 upwards, and then controls the moving contact 221 to move through the movement control component 53, causing the mating block 521 on the third bracket 52 to move to the second groove 514. Then, when the moving contact 221 separates from the stationary contact 11, its arc-shaped end 2211 is squeezed and moves. The moving contact 221 drives the third bracket 52 to move, causing the mating block 521 to squeeze the second transition section 515, thereby pushing the second bracket 51 to move, causing the control disk 412 to rotate one-third of a circle. When the moving contact 221 re-engages with the stationary contact 11, it has rotated one full circle. Then, the operator releases the rotating handle 23, completing the double fixation of the moving contact 221.

[0058] Reference Figure 14 and Figure 15 The second bracket 51 has a slanted groove 516; the docking block 521 is slidably installed on the third bracket 52.

[0059] This invention achieves the function of facilitating the reset of the docking block 521 through the inclined groove 516 and the third bracket 52. After the working condition is changed, the operator releases the rotating handle 23, and the moving contact 221 engages with the stationary contact 11 under the elastic force of the first elastic element 311, thereby driving the third bracket 52 and the docking block 521 to reset. The docking block 521 is squeezed by the inclined groove 516 and slides into the third bracket 52 until it moves to the first groove 511 and pops out, completing the reset.

[0060] The present invention also protects a GIS device having a cable terminal capable of performing an efficient withstand voltage test as described above.

[0061] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A cable terminal capable of performing efficient withstand voltage tests, characterized in that, It includes a three-connecting pipe (1) and a connecting device (2); The three-connector pipe (1) has a sealed cavity and three sets of stationary contacts (11) inside. The connecting device (2) includes a spindle (21), a mounting bracket (22), and a rotating handle (23); One end of the main shaft (21) extends from the outside of the three-connected pipe (1) through the outer wall of the three-connected pipe (1) into the cavity and is rotatably connected to the inner wall of the three-connected pipe (1). The other end of the main shaft (21) is connected to the rotating handle (23). The three sets of stationary contacts (11) are symmetrically distributed about the axis center of the main shaft (21); The mounting bracket (22) is sleeved on the spindle (21) and is located in the cavity. The mounting bracket (22) is equipped with a moving contact (221) that can be inserted and cooperated with the stationary contact (11). The moving contact (221) is provided in two sets. When the spindle (21) is rotated, the spindle (21) will drive the mounting bracket (22) and the moving contact (221) mounted on the mounting bracket (22) to rotate synchronously. The two sets of moving contacts (221) can be plugged into and cooperate with two different stationary contacts (11) respectively. The three-connector pipe (1) is also provided with a plug-in control device (3), which includes an elastic support component (31) and a locking component (32). The moving contact (221) is slidably mounted on the mounting bracket (22). The moving contact (221) includes a straight section and an arc-shaped end (2211). The arc-shaped end (2211) is located at the end of the moving contact (221) away from the main shaft (21). The mounting bracket (22) has a sliding groove (312), and the moving contact (221) has a protrusion (313) that slides and engages with the sliding groove (312). The elastic support assembly (31) includes a first elastic element (311), the two ends of which are connected to the mounting bracket (22) and the moving contact (221), respectively; The locking assembly (32) is disposed on the stationary contact (11) and is used to fix the moving contact (221). The mounting bracket (22) is provided with an auxiliary control device (4) for controlling the opening and closing of the locking assembly (32); The locking assembly (32) includes a first bracket (321), a locking block (322), and a second elastic member (323); The first support (321) is mounted on the stationary contact (11); The locking block (322) is mounted on the first bracket (321) and slides in engagement with the stationary contact (11); The two ends of the second elastic element (323) are respectively connected to the first bracket (321) and the stationary contact (11); The moving contact (221) has a through hole (324). When the moving contact (221) and the stationary contact (11) are inserted into each other, the locking block (322) can be inserted into the through hole (324). The auxiliary control device (4) includes an intermittent control component (41) and a rotation control component (42). The intermittent control assembly (41) includes a rotating shaft (411), a control panel (412), and a latch (413). The rotating shaft (411) is rotatably mounted on the mounting bracket (22); The control panel (412) is sleeved on the rotating shaft (411), and the control panel (412) has a slot (4121) that cooperates with the latch (413). The latch (413) is mounted on the first bracket (321); The rotation control assembly (42) is mounted on the mounting bracket (22) and is used to control the rotation of the shaft (411); The stationary contact (11) is provided with a mating groove (111), and the bottom end of the mating groove (111) is set to be arc-shaped; When the moving contact (221) and the stationary contact (11) are plugged into each other and the arc-shaped end (2211) of the moving contact (221) abuts against the bottom end of the mating groove (111), the straight section of the moving contact (221) is located in the mating groove (111), and the main shaft (21) cannot rotate. When the moving contact (221) and the stationary contact (11) are plugged in and the only part of the moving contact (221) is located in the mating groove (111), there is a gap between the arc end (2211) of the moving contact (221) and the bottom end of the mating groove (111). Rotating the main shaft (21) will compress the first elastic element (311) and separate the moving contact (221) from the stationary contact (11).

2. A cable terminal capable of performing efficient withstand voltage tests according to claim 1, characterized in that, The rotation control assembly (42) includes a rack (421), a rotating gear (422), a mounting ring (423), a ratchet (424), and a stop pawl (425). The rack (421) is slidably mounted on the mounting bracket (22); The rotating gear (422) is rotatably mounted on the mounting bracket (22) and its axis is collinear with the axis of the rotating shaft (411). The rotating gear (422) meshes with the rack (421) for transmission. The mounting ring (423) is mounted on the rotating gear (422); The ratchet (424) is fitted onto the rotating shaft (411); The stop pawl (425) is mounted on the mounting ring (423) and is engaged with the ratchet gear (424) for transmission; The mounting bracket (22) is also equipped with a sliding control device (5) for controlling the sliding of the rack (421).

3. A cable terminal capable of performing high-efficiency withstand voltage tests according to claim 2, characterized in that, The sliding control device (5) includes a second bracket (51), a third bracket (52), and a first transmission assembly; The second bracket (51) is slidably mounted on the mounting bracket (22), and the rack (421) is connected to the second bracket (51); The second bracket (51) has a first groove (511) and a first transition section (512) is provided on the side of the first groove (511) near the main shaft (21). A third elastic element (513) is installed on the second bracket (51), and the two ends of the third elastic element (513) are connected to the second bracket (51) and the mounting bracket (22) respectively. The third bracket (52) is slidably mounted on the mounting bracket (22) and is connected to the protrusion (313) on the moving contact (221); The third support (52) is provided with a docking block (521); The mounting bracket (22) is also provided with a motion control component (53) for controlling the movement of the moving contact (221); When the moving contact (221) moves toward the axis of the main shaft (21), the mating block (521) slides along the first transition section (512) and pushes the second bracket (51) to move.

4. A cable terminal capable of performing high-efficiency withstand voltage tests according to claim 3, characterized in that, The motion control assembly (53) includes a connecting frame (531), a fourth elastic element (532), a fourth bracket (533), a fixed shaft (534), and a guide bracket (535); The main shaft (21) and the three connecting pipes (1) are in sliding fit; The connecting bracket (531) is sleeved on the main shaft (21) and slides with the main shaft (21). When the main shaft (21) rotates, it will drive the connecting bracket (531) to rotate synchronously. The two ends of the fourth elastic element (532) abut against the connecting frame (531) and the mounting frame (22) respectively; The fourth bracket (533) is mounted on the connecting bracket (531); The fixed shaft (534) is mounted on the third bracket (52); The guide bracket (535) is mounted on the fourth bracket (533) and slides with the fixed shaft (534).

5. A cable terminal capable of performing efficient withstand voltage tests according to claim 3, characterized in that, The second bracket (51) is also provided with a second groove (514), and a second transition section (515) is provided on the side of the second groove (514) near the axis of the main shaft (21).

6. A cable terminal capable of performing efficient withstand voltage tests according to claim 5, characterized in that, The second bracket (51) has a slanted groove (516); The docking block (521) is slidably mounted on the third bracket (52).

Images