A discharge detection device for switchgear

Abstract

This invention discloses a discharge detection device for a switchgear. The device includes a cabinet, a support plate, a mounting bracket, a mounting port, a mounting shell, a connecting rod, a high-frequency pulse current sensor, a detector, a position adjustment mechanism, a first device to be tested, and a second device to be tested. The support plate is fixedly installed inside the cabinet, and a mounting port is provided on the top of the support plate. The first device to be tested is slidably connected through the mounting port. At the same time, the mounting bracket is fixed on the top of the support plate and fixedly connected to the second device to be tested. The high-frequency pulse current sensor is connected to the mounting shell through the connecting rod. The detector is electrically connected to the high-frequency pulse current sensor. By fixing the position adjustment mechanism on both sides of the mounting shell, the mounting shell can be moved by operating the position adjustment mechanism during discharge detection, thereby expanding the detection range of the high-frequency pulse current sensor and improving the reliability of the discharge detection device.

Description

Technical Field

[0001] This invention relates to the field of discharge detection device technology, and more particularly to a discharge detection device for switchgear. Background Technology

[0002] High-voltage switchgear mainly plays a role in switching, control, or protection in power generation, transmission, distribution, power conversion, and consumption. When there are insulation defects inside the high-voltage switchgear, partial discharge will occur. By detecting partial discharge through a discharge detection device, the insulation status of the switchgear equipment can be effectively determined. Effective detection of partial discharge is of great significance to ensuring the safe and stable operation of the switchgear.

[0003] The existing partial discharge detection device consists of a discharge detector, an ultrasonic probe, and a mounting frame. It detects discharge in the switch cabinet by installing the discharge detector inside the switch cabinet. However, it can only move in a regular horizontal or vertical direction inside the switch cabinet, and the detection trajectory is relatively simple, which limits the detection range. This is not conducive to effectively detecting separately arranged electrical components in the switch cabinet, thus reducing the reliability of the partial discharge detection device. Summary of the Invention

[0004] This invention provides a discharge detection device for switchgear, which solves the technical problem that existing technologies can only perform regular horizontal or vertical movements inside the switchgear when conducting discharge detection, resulting in a single detection trajectory and reduced reliability of the partial discharge detection device.

[0005] The present invention provides a discharge detection device for a switchgear, comprising: a cabinet, a support plate, a mounting frame, a mounting port, a mounting shell, a connecting rod, a high-frequency pulse current sensor, a detector, a position adjustment mechanism, a first device to be tested, and a second device to be tested;

[0006] The support plate is fixedly installed inside the cabinet, and the top of the support plate is provided with an installation port, which is slidably connected to the first device to be tested.

[0007] The mounting bracket is fixedly installed on the top of the support plate, and the mounting bracket is fixedly connected to the second device to be tested;

[0008] The high-frequency pulse current sensor is connected to the mounting housing via the connecting rod;

[0009] The detector and the high-frequency pulse current sensor are electrically connected via a connecting wire;

[0010] The position adjustment mechanism is fixedly installed on both sides of the mounting shell, and is used to respond to the received start level signal and drive the mounting shell to move up and down according to a preset movement trajectory.

[0011] Optionally, the detector includes a detector body, a wire winding and unwinding mechanism, and a conductive mechanism;

[0012] The wire winding and unwinding mechanism is installed on both sides of the detector body and is used to perform wire winding and unwinding operations during the movement of the mounting shell.

[0013] The conductive mechanism is disposed on the surface of the wire take-up and take-down mechanism;

[0014] The conductive mechanism is electrically connected to the detector body via a first conductive post.

[0015] Optionally, the position adjustment mechanism includes a mounting plate, a first motor, and a sliding plate;

[0016] The mounting plates are symmetrically connected to the two side walls inside the cabinet.

[0017] The mounting plate is provided with a guide rail consisting of interconnected vertical grooves, horizontal grooves and oblique grooves;

[0018] Each of the vertical slots is equipped with a pulley column, and a second motor is fixedly connected to the end of one of the pulley columns;

[0019] The second output shaft end of the second motor is fixedly connected to the mounting housing;

[0020] The first motor is fixedly connected to the bottom of the support plate, and the first output shaft end of the first motor passes through the support plate and is rotatably connected to the top surface inside the cabinet through a threaded rod;

[0021] The sliding plate is slidably connected to the inner wall of the cabinet, and the surface of the sliding plate is provided with a threaded through hole that is threadedly connected to the threaded rod.

[0022] The side wall of the sliding plate is provided with a through inclined guide opening that is slidably connected to the sliding column.

[0023] Optionally, the mounting housing includes a detection port, an arc-shaped groove, a baffle plate, and a linkage mechanism;

[0024] The arc-shaped groove is disposed on the inner wall of the detection port to protect the high-frequency pulse current sensor;

[0025] The arc-shaped groove is slidably connected to the baffle plate, and the arc-shaped groove and the groove wall of the baffle plate are fixedly connected by a first spring.

[0026] The linkage mechanism is symmetrically arranged on the surface of the shield plate, and is used to link the shield plate to slide out of the arc groove to block the detection port.

[0027] Optionally, the mounting plate includes a one-way limiting mechanism, a pushing mechanism, and a control mechanism;

[0028] The one-way limiting mechanism is installed in the inclined groove;

[0029] The pushing mechanism is installed in the guide rail and is fixedly connected to the second device under test, and is used to push the second device under test to slide along the mounting port;

[0030] The control mechanism is installed in the vertical groove and the inclined groove respectively, and is used to control the operation of the first motor and the electric cylinder on the support plate.

[0031] Optionally, the unidirectional limiting mechanism includes a first mounting groove, a second mounting groove, a first trapezoidal block, and a second trapezoidal block;

[0032] The first mounting slot is installed in the vertical slot, and the second mounting slot is installed in the inclined slot;

[0033] The first mounting groove and the first trapezoidal block are slidably connected by a second spring;

[0034] The second mounting slot is slidably connected to the second trapezoidal block by a third spring.

[0035] Optionally, the wire winding mechanism includes a mounting post, a third mounting slot, a third motor, and a storage housing;

[0036] The mounting posts are installed on both sides of the detector body, and the mounting posts are fixedly connected to the storage shell;

[0037] The third mounting slot is installed on both sides of the detector body, and the third mounting slot is fixedly connected to the third motor;

[0038] The third motor output shaft has a second conductive post at its end, and the end of the second conductive post penetrates through the storage shell.

[0039] Optionally, the pushing mechanism includes a sliding port, a fourth mounting groove, and a linkage plate;

[0040] The sliding port is mounted on the support plate, and the sliding port and the mounting port are in communication with each other;

[0041] The sliding port is slidably connected to the linkage plate, and the top of the linkage plate is fixedly connected to the bottom of the second device to be tested;

[0042] The fourth mounting slot is mounted on the support plate, and the electric cylinder is fixedly connected to the fourth mounting slot.

[0043] Optionally, the control mechanism includes a fifth mounting slot, a pressure switch, and a third trapezoidal block;

[0044] The fifth mounting slot is mounted on the guide rail, and the fifth mounting slot is fixedly connected to the pressure switch;

[0045] The third trapezoidal block is fixedly connected to the pressure receiving end of the pressure switch;

[0046] The pressure switch is electrically connected to the first motor.

[0047] Optionally, the conductive mechanism includes an L-shaped plate and a conductive ring;

[0048] The L-shaped plate is installed on both sides of the detector body, and the L-shaped plate is fixedly connected to the conductive ring;

[0049] The conductive ring is nested and connected to the first conductive post;

[0050] The conductive ring is equipped with a current-carrying wire that is electrically connected to the detector body.

[0051] As can be seen from the above technical solutions, the present invention has the following advantages:

[0052] This invention fixes a support plate inside a cabinet, with a mounting opening at the top of the support plate for sliding connection to a first device under test. A mounting bracket is also fixed to the top of the support plate and connected to a second device under test. A high-frequency pulse current sensor is connected to the mounting housing via a connecting rod, and the detector is electrically connected to the high-frequency pulse current sensor. A position adjustment mechanism is fixedly mounted on both sides of the mounting housing, allowing the housing to move during discharge detection. During discharge detection, the position adjustment mechanism moves the mounting housing along a preset trajectory, expanding the detection range of the high-frequency pulse current sensor inside the housing for discharge within the cabinet and improving the reliability of the partial discharge detection device. Attached Figure Description

[0053] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0054] Figure 1 A schematic diagram of the overall structure of a discharge detection device for a switchgear provided in an embodiment of the present invention;

[0055] Figure 2This is a schematic diagram of the connection structure between the support plate and the mounting bracket of a discharge detection device for a switchgear, provided in an embodiment of the present invention.

[0056] Figure 3 A schematic diagram (A) of the connection between the support plate and the mounting bracket of a discharge detection device for a switchgear according to an embodiment of the present invention;

[0057] Figure 4 This is a schematic diagram of the linkage plate and sliding port of a discharge detection device for a switchgear provided in an embodiment of the present invention;

[0058] Figure 5 This is a schematic diagram of the guide port structure of a discharge detection device for a switchgear provided in an embodiment of the present invention;

[0059] Figure 6 A schematic diagram (B) of the structure at the connection between the mounting shell and the sliding plate of a discharge detection device for a switchgear provided in an embodiment of the present invention;

[0060] Figure 7 A cross-sectional structural diagram of the storage shell, mounting shell, shielding plate, and connecting rod of a discharge detection device for a switchgear provided in an embodiment of the present invention;

[0061] Figure 8 A schematic diagram (C) of the cross-sectional structure of the mounting housing of a discharge detection device for a switchgear provided in an embodiment of the present invention;

[0062] Figure 9 A schematic diagram of the third mounting slot opening structure of a discharge detection device for a switchgear provided in an embodiment of the present invention;

[0063] Figure 10 This is a schematic diagram of the connection structure between the L-shaped plate and the conductive ring of a discharge detection device for a switchgear provided in an embodiment of the present invention;

[0064] Figure 11 A schematic diagram of the connection structure between the connecting rod and the high-frequency pulse current sensor of a discharge detection device for a switchgear provided in an embodiment of the present invention;

[0065] Figure 12 A schematic diagram of the connection structure between the shield and the first spring of a discharge detection device for a switchgear provided in an embodiment of the present invention;

[0066] Figure 13 This is a schematic diagram of the guide rail structure of a discharge detection device for a switchgear provided in an embodiment of the present invention.

[0067] The meanings of the reference numerals in the attached figures are as follows:

[0068] 1. Cabinet; 2. Support plate; 3. Mounting bracket; 4. Vertical groove; 5. Horizontal groove; 6. Mounting port; 7. Angled groove; 8. Mounting plate; 9. Guide rail; 10. Sliding column; 11. Second motor; 12. Mounting shell; 13. Detection port; 14. Connecting rod; 15. High-frequency pulse current sensor; 16. Detector body; 17. Mounting column; 18. Storage shell; 19. Third mounting groove; 20. Third motor; 21. Conductive column; 22. Connecting wire; 23. L-shaped plate; 24. Conductive ring; 25. 1. Power-carrying wire; 26. First motor; 27. Threaded rod; 28. Sliding plate; 29. ​​Guide port; 30. First mounting slot; 31. Second mounting slot; 32. First trapezoidal block; 33. Second trapezoidal block; 34. Arc groove; 35. Baffle plate; 36. First spring; 37. Connecting plate; 38. Gear; 39. Rack; 40. Sliding port; 41. Linkage plate; 42. Fourth mounting slot; 43. Electric cylinder; 44. Fifth mounting slot; 45. Pressure switch; 46. Third trapezoidal block; 47. Through port. Detailed Implementation

[0069] This invention provides a discharge detection device for switchgear, which addresses the technical problem that existing partial discharge detection devices consist of a discharge detector, an ultrasonic probe, and a mounting frame. While these devices detect discharge within the switchgear by installing the detector inside, they can only move in a regular horizontal or vertical motion within the switchgear, resulting in a limited detection range. This makes it difficult to detect separately arranged electrical components within the switchgear at effective distances, thus reducing the reliability of the partial discharge detection device.

[0070] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0071] For easier understanding, please refer to Figures 1 to 13 The present invention provides a discharge detection device for switchgear, comprising: cabinet 1, support plate 2, mounting bracket 3, mounting port 6, mounting shell 12, connecting rod 14, high-frequency pulse current sensor 15, detector, position adjustment mechanism, first device to be detected and second device to be detected;

[0072] The support plate 2 is fixedly installed inside the cabinet 1, and the top of the support plate 2 is provided with an installation port 6, which is slidably connected to the first device to be tested.

[0073] Mounting bracket 3 is fixedly installed on the top of support plate 2, and mounting bracket 3 is fixedly connected to the second device to be tested;

[0074] The high-frequency pulse current sensor 15 is connected to the mounting housing 12 via the connecting rod 14;

[0075] The detector and the high-frequency pulse current sensor 15 are electrically connected via a connecting cable 22;

[0076] The position adjustment mechanism is fixedly installed on both sides of the mounting shell 12. It is used to respond to the received start level signal and drive the mounting shell 12 to move up and down according to the preset moving trajectory.

[0077] In this embodiment of the invention, the device is first fixedly installed inside the cabinet 1 by a support plate 2. Then, an installation port 6 is provided on the top of the support plate 2, through which a first device to be tested is slidably connected. A mounting bracket 3 is fixedly installed on the top of the support plate 2, and the mounting bracket 3 is fixedly connected to the second device to be tested, for example, by welding, riveting, or pin connection. The top of the support plate 2 has a mounting bracket 3, and a row of second devices to be tested is fixedly connected to the surface of the mounting bracket 3. A connecting rod 14 is fixedly connected to the inside of the mounting shell 12, and a high-frequency pulse current sensor 15 is fixedly embedded on the surface of the connecting rod 14. The high-frequency pulse current sensor 15 is electrically connected to the detector via a connecting wire 22, and a position adjustment mechanism is fixedly installed on both sides of the mounting shell 12. When a start-up level signal is received, it will drive the mounting shell 12 to move up and down according to a preset movement trajectory.

[0078] It should be noted that the top of the switch plate has five mounting ports 6, and the inner walls of the mounting ports 6 are slidably connected to the second device to be tested.

[0079] It should be noted that the second device under test is divided into a first sub-device under test and a second sub-device under test.

[0080] It should be noted that the position adjustment mechanism first moves the mounting housing 12 vertically downwards. When it reaches the second device under test, it moves forward until it passes the second device under test, and then returns to the initial position. During the movement of the mounting housing 12, the high-frequency pulse current sensor 15 also detects the discharge around the first and second devices under test.

[0081] Please see Figure 1-3 The detector includes a detector body 16, a wire winding and unwinding mechanism, and a conductive mechanism. The wire winding and unwinding mechanism is installed on both sides of the detector body 16 and is used to wind up and unwind the wire during the movement of the mounting shell 12. The conductive mechanism is disposed on the surface of the wire winding and unwinding mechanism. The conductive mechanism is electrically connected to the detector body 16 through a first conductive post 21.

[0082] In this embodiment of the invention, the wire winding mechanism is installed on both sides of the detector body 16. When the mounting shell 12 moves, the wire winding mechanism can be used to wind the connecting wire 22 between the high-frequency pulse current sensor 15 and the detector. This facilitates the connection rod 14 of the high-frequency pulse current sensor 15 pulling the wire down with the mounting shell 12, thereby avoiding the phenomenon that the high-frequency pulse current sensor 15 is hindered from moving down to detect due to the connecting wire 22 being too short. By setting a conductive mechanism on the surface of the wire winding mechanism, even when the first conductive post 21 rotates, the first conductive post 21 can still be electrically connected to the detector.

[0083] Please see Figure 13 , Figure 13 This is a schematic diagram of the guide rail 9 of a discharge detection device for a switchgear provided in an embodiment of the present invention.

[0084] The present invention provides a discharge detection device for a switchgear, the position adjustment mechanism of which includes a mounting plate 8, a first motor 26, and a sliding plate 28; the mounting plate 8 is symmetrically connected to the two side walls inside the cabinet 1; the mounting plate 8 is provided with a guide rail 9 composed of interconnected vertical grooves 4, horizontal grooves 5, and oblique grooves 7; each vertical groove 4 is provided with a pulley column, and one of the pulley columns is fixedly connected to a second motor 11 at its end; the second output shaft end of the second motor 11 is fixedly connected to the mounting shell 12; the first motor 26 is fixedly connected to the bottom of the support plate 2, and the first output shaft end of the first motor 26 passes through the support plate 2 and is rotatably connected to the top surface inside the cabinet 1 through a threaded rod 27; the sliding plate 28 is slidably connected to the inner wall of the cabinet 1, and the surface of the sliding plate 28 is provided with a threaded through hole and threadedly connected to the threaded rod 27; the side wall of the sliding plate 28 is provided with a through inclined guide port 29 and is slidably connected to a sliding column 10.

[0085] In this embodiment of the invention, two mounting plates 8 are fixedly connected to the two side walls inside the cabinet 1, and the side walls are provided with guide rails 9 consisting of vertical grooves 4, horizontal grooves 5 and oblique grooves 7 connected in sequence. Each of the two vertical grooves 4 is equipped with a pulley column. The end of one of the pulley columns is fixedly connected to a second motor 11. The end of the output shaft of the second motor 11 is fixedly connected to a mounting shell 12. The first motor 26 is fixedly connected to the bottom of the support plate 2. The first output shaft end of the first motor 26 passes through the support plate 2 and extends upwards before being fixedly connected to a threaded rod 27. The threaded rod 27 is rotatably connected to the top surface inside the cabinet 1. The sliding plate 28 is slidably connected to the inner wall of the cabinet 1. The sliding plate 28 is threadedly connected to the threaded rod 27 through a threaded through hole on its surface. An inclined guide opening 29 is provided through the side wall of the sliding plate 28. The inner wall of the guide opening 29 is slidably connected to the surface of the sliding column 10.

[0086] It should be noted that during operation, the first motor 26 is started by an external controller. The output shaft of the first motor 26 drives the threaded rod 27 to rotate, thereby causing the sliding plate 28 to move down along the inner wall of the cabinet 1. As the sliding plate 28 moves down, when the first motor 26 is not working, its output shaft is locked, so that the mounting shell 12 connected to it will not rotate. The moving sliding column 10 synchronously drives the mounting shell 12 to move down, thereby facilitating the high-frequency pulse current sensor 15 to perform close-range discharge detection on the surfaces of the first and second devices under test on the mounting bracket 3.

[0087] It should be noted that the first motor 26 in this embodiment can be a stepper motor or other types of motors, as long as the above functions are achieved, and no specific limitation is made here.

[0088] Please see Figure 8 and 12 The mounting housing 12 includes a detection port 13, an arc-shaped groove 34, a baffle plate 35, and a linkage mechanism. The arc-shaped groove 34 is disposed on the inner wall of the detection port 13 to protect the high-frequency pulse current sensor 15. The arc-shaped groove 34 and the baffle plate 35 are slidably connected, and the arc-shaped groove 34 and the groove wall of the baffle plate 35 are fixedly connected by a first spring 36. The linkage mechanism is symmetrically disposed on the surface of the baffle plate 35 to link the baffle plate 35 to slide out of the arc-shaped groove 34 to block the detection port 13.

[0089] In this embodiment of the invention, in order to protect the high-frequency pulse current sensor 15, an arc-shaped groove 34 is provided on the inner wall of the detection port 13. A baffle plate 35 is slidably connected to the groove wall of the arc-shaped groove 34. A plurality of first springs 36 are fixedly connected between the side wall of the baffle plate 35 and the groove wall of the arc-shaped groove 34. In order to link the baffle plate 35 to slide out of the arc-shaped groove 34 to block the detection port 13, a linkage mechanism is provided on the surface of the baffle plate 35.

[0090] It should be noted that the linkage mechanism includes a connecting plate 37 and a rack 39. The connecting plate 37 is fixedly connected to the surface of the baffle plate 35, and a gear 38 is fixedly connected to the side wall of the connecting plate 37. The gear 38 is rotatably connected to the surface of the mounting shell 12. The rack 39 is fixedly connected to the inner top surface of the cabinet 1. The rack 39 meshes with the gear 38. During operation, when the sliding column 10 moves down along the vertical groove 901, the gear 38 rotatably connected to the surface of the mounting shell 12 rotates under the transmission of the rack 39. Thus, under the connection of the connecting plate 37, the baffle plate 35 slides into the arc-shaped groove 34, and the first spring 36 resets. This allows the baffle plate 35, which has been reset to the inside of the arc-shaped groove 34, to be limited inside the arc-shaped groove 34 without the action of external force, thereby eliminating the obstruction of the detection port 13 by the baffle plate 35. As the sliding column 10 slides from the inside of the inclined groove 903 into the vertical groove 901 and continues to move upward, the gear 38, which moves upward with the mounting shell 12, rotates under the transmission of the rack 39. This causes the end of the baffle plate 35 to be pulled along the groove wall of the arc-shaped groove 34 by the connecting plate 37, while stretching the first spring 36. The detection port 13 is blocked by the rotating baffle plate 35, which facilitates the protection of the high-frequency pulse current sensor 15.

[0091] Please see Figure 2 , Figure 4 and Figure 13 The mounting plate 8 includes a one-way limiting mechanism, a pushing mechanism, and a control mechanism; the one-way limiting mechanism is installed in the inclined groove 7; the pushing mechanism is installed in the guide rail 9 and is fixedly connected to the second device to be tested, and is used to push the second device to be tested to slide along the mounting opening 6; the control mechanism is installed in the vertical groove 4 and the inclined groove 7 respectively, and is used to control the operation of the first motor 26 and the electric cylinder 43 on the support plate 2.

[0092] In this embodiment of the invention, the mounting plate 8 includes a one-way limiting mechanism, a pushing mechanism, and a control mechanism. First, the one-way limiting mechanism is installed in the inclined groove 7. Then, the pushing mechanism is fixedly installed in the guide rail 9 so that the pushing mechanism is fixedly connected to the second device to be tested, so as to push the second device to be tested to slide along the mounting opening 6. Then, the control mechanism is installed in the vertical groove 4 and the inclined groove 7 to control the operation of the first motor 26 and the electric cylinder 43 set on the support plate 2.

[0093] Please see Figure 13 The one-way limiting mechanism includes a first mounting groove 30, a second mounting groove 31, a first trapezoidal block 32, and a second trapezoidal block 33; the first mounting groove 30 is installed in the vertical groove 4, and the second mounting groove 31 is installed in the inclined groove 7; the first mounting groove 30 and the first trapezoidal block 32 are slidably connected by a second spring; the second mounting groove 31 and the second trapezoidal block 33 are slidably connected by a third spring.

[0094] In this embodiment of the invention, the limiting mechanism includes a first mounting groove 30, a second mounting groove 31, a first trapezoidal block 32, and a second trapezoidal block 33. The first mounting groove 30 and the second mounting groove 31 are respectively disposed on the vertical groove 4 and the inclined groove 7. The first trapezoidal block 32 and the second trapezoidal block 33 are slidably connected to the groove walls of the first mounting groove 30 and the second mounting groove 31, respectively. In order to facilitate limiting one side of the vertical groove 4 and the inclined groove 7, a second spring is fixedly connected between the groove wall of the first mounting groove 30 and the first trapezoidal block 32, and a third spring is fixedly connected between the groove wall of the second mounting groove 31 and the second trapezoidal block 33.

[0095] It should be noted that during operation, a first trapezoidal block 32 with a support spring is installed on the inner wall of the vertical groove 4. As the sliding column 10 slides from the inclined groove 7 into the vertical groove 4, the surface of the sliding column 10 pushes the inclined surface of the first trapezoidal block 32, causing the first trapezoidal block 32 to slide into the first mounting groove 30 and compress the support spring inside the first mounting groove 30. This facilitates the sliding column 10 sliding along the inner wall of the inclined groove 7 into the vertical groove 4. After the sliding column 10 slides into the vertical groove 4, the compressed spring in the first mounting groove 30... The support spring returns to its original position, thereby pushing the first trapezoidal block 32 to reset. After resetting, the first trapezoidal block 32 can block one side of the sliding column 10 in the vertical groove 4, so that the sliding column 10 can only slide down the inner wall of the vertical groove 4, realizing the unidirectional sliding of the sliding column 10 along the inclined groove 7 into the vertical groove 4. Similarly, the second trapezoidal block 33 with a support spring is set inside the second mounting groove 31, so that the sliding column 10 can only slide unidirectionally along the horizontal groove 5 into the inclined groove 7, which facilitates the high-frequency pulse current sensor 15 to detect the discharge status inside the cabinet 1 over a wide range.

[0096] Please see Figure 9-10 The wire winding mechanism includes a mounting post 17, a third mounting groove 19, a third motor 20, and a storage shell 18. The mounting post 17 is installed on both sides of the detector body 16 and is fixedly connected to the storage shell 18. The third mounting groove 19 is installed on both sides of the detector body 16 and is fixedly connected to the third motor 20. The output shaft end of the third motor 20 is provided with a second conductive post 21, and the end of the second conductive post 21 passes through the storage shell 18.

[0097] In this embodiment of the invention, the wire take-up and take-down mechanism includes mounting posts 17, a third mounting groove 19, a third motor 20, and a storage shell 18. The ends of the two mounting posts 17 are fixedly connected to the storage shell 18. The third mounting groove 19 is mounted on the side wall of the detector body 16. The groove wall of the third mounting groove 19 is fixedly connected to the third motor 20. The output shaft end of the third motor 20 is provided with a second conductive post 21. The end of the second conductive post 21 passes through the storage shell 18 and extends into its interior, where it is rotatably connected to its inner wall. This facilitates the connection rod 14, which is connected to the high-frequency pulse current sensor 15, to pull the wire down with the mounting shell 12, thus avoiding the phenomenon that the high-frequency pulse current sensor 15 is obstructed from moving down for detection due to the short connection wire 22.

[0098] It should be noted that the surface of the conductive post 21 located inside the storage shell 18 is electrically fixedly connected to the end of the connecting wire 22 away from the high-frequency pulse current sensor 15. The connecting wire 22 is neatly coiled on the surface of the conductive post 21, and the end of the connecting wire 22 that is electrically connected to the high-frequency pulse current sensor 15 passes through the port 47.

[0099] Please see Figure 3 , Figure 4 and Figure 13 The driving mechanism includes a sliding port 40, a fourth mounting groove 42, and a linkage plate 41; the sliding port 40 is mounted on the support plate 2, and the sliding port 40 is connected to the mounting port 6; the sliding port 40 is slidably connected to the linkage plate 41, and the top of the linkage plate 41 is fixedly connected to the bottom of the second device to be tested; the fourth mounting groove 42 is mounted on the support plate 2, and the electric cylinder 43 is fixedly connected to the fourth mounting groove 42.

[0100] In this embodiment of the invention, the pushing mechanism includes a sliding port 40, a fourth mounting groove 42, and a linkage plate 41. The sliding port 40 is disposed on the support plate 2, and the sliding port 40 and the mounting port 6 are interconnected. The inner wall of the sliding port 40 is slidably connected to the linkage plate 41. The top of the linkage plate 41 is fixedly connected to the bottom of the second device to be tested. The fourth mounting groove 42 is disposed on the side wall of the support plate 2. An electric cylinder 43 is fixedly connected to the groove wall of the fourth mounting groove 42, so that the output shaft of the first motor 26 connected to the end of the sliding column 10 can drive the mounting shell 12 to rotate, so that the detection port 13 on the surface of the mounting shell 12 faces downward, thereby expanding the detection range.

[0101] It should be noted that after the high-frequency pulse current sensor 15 completes the discharge detection of the first and second devices to be tested on the surface of the mounting bracket 3, the sliding column 10 continues to slide down along the inner wall of the vertical groove 4. During the descent, the first motor 26 and the electric cylinder 43 are started by the control mechanism. Since the sliding column 10 is slidably connected to the inner wall of the guide port 29, the sliding column 10 will not rotate. This facilitates the output shaft of the first motor 26 connected to the end of the sliding column 10 to drive the mounting shell 12 to rotate, so that the detection port 13 on the surface of the mounting shell 12 faces downward, thus expanding the detection range.

[0102] Please see Figure 6 , Figure 11 and Figure 13 The control mechanism includes a fifth mounting slot 44, a pressure switch 45, and a third trapezoidal block 46; the fifth mounting slot 44 is mounted on the guide rail 9 and is fixedly connected to the pressure switch 45; the third trapezoidal block 46 is fixedly connected to the pressure receiving end of the pressure switch 45; the pressure switch 45 is electrically connected to the first motor 26.

[0103] In this embodiment of the invention, the control mechanism includes a fifth mounting groove 44, a pressure switch 45, and a third trapezoidal block 46. The fifth mounting groove 44 is respectively mounted on the groove walls of the vertical groove 4 and the inclined groove 7, and the pressure switch 45 is fixedly connected to the groove wall of the fifth mounting groove 44. The pressure-receiving end of the pressure switch 45 is fixedly connected to the third trapezoidal block 46, and the pressure switch 45 is electrically connected to the first motor 26 and the electric cylinder 43.

[0104] It should be noted that after the high-frequency pulse current sensor 15 completes the detection of the discharge status around the first and second devices under test on the surface of the mounting bracket 3, as the sliding column 10 continues to slide down the inner wall of the vertical groove 4, the sliding column 10 pushes the inclined surface of the third trapezoidal block 46 extending into the vertical groove 4, thereby pushing the third trapezoidal block 46 into the fifth mounting groove 44 on the groove wall of the vertical groove 4, thus pressing the pressure switch 45 at that location. After the pressure switch 45 is pressed, it automatically controls the first motor 26 and the electric cylinder 43 to start. When the sliding column 10 passes through the fifth mounting groove 44, the pressure switch 45 automatically resets and drives the third trapezoidal block 46 at that location to reset, waiting for the next press. When the pressure switch 45 is pressed once, it controls the first motor 26 to rotate a preset number of times and then stop, and controls the piston rod of the electric cylinder 43 to push the linkage plate 41 to a preset position and stop, thereby expanding the detection range of the high-frequency pulse current sensor 15.

[0105] Please see Figure 2 , Figure 5 and Figure 9-10The conductive mechanism includes an L-shaped plate 23 and a conductive ring 24. The L-shaped plate 23 is installed on both sides of the detector body 16 and is fixedly connected to the conductive ring 24. The conductive ring 24 is nested with the first conductive post 21. A current-carrying wire 25 is provided inside the conductive ring 24 and electrically connected to the detector body 16.

[0106] In this embodiment of the invention, the conductive mechanism includes two L-shaped plates 23 and a conductive ring 24. The L-shaped plates 23 are fixedly connected to the side walls of the detector body 16 on both sides. The ends of the two L-shaped plates 23 are fixedly connected to the conductive ring 24. In order to facilitate the normal rotation of the conductive post 21 and avoid the phenomenon of twisting of the electrically connected energized wire 25 caused by the rotation of the conductive post 21, the conductive ring 24 is movably sleeved with the first conductive post 21, and the conductive ring 24 is electrically connected to the detector body 16 through the energized wire 25 provided inside.

[0107] It should be noted that the interior of the conductive ring 24 is in contact with the surface of the conductive post 21 for conduction, and the L-shaped plate 23 is made of insulating material.

[0108] In this embodiment of the invention, a support plate is fixedly installed inside the cabinet, with an installation port on the top of the support plate. A first device to be tested is slidably connected through the installation port. Simultaneously, a mounting bracket is fixed to the top of the support plate and fixedly connected to a second device to be tested. A high-frequency pulse current sensor is connected to the mounting housing via a connecting rod. The detector is electrically connected to the high-frequency pulse current sensor. A position adjustment mechanism is fixedly installed on both sides of the mounting housing, allowing the mounting housing to move during discharge detection. This solves the technical problem of current technologies where the discharge detector is installed inside the switch cabinet, limiting its detection range to a single, regular horizontal or vertical movement within the cabinet. This restricts the detection range and hinders effective distance detection of separately arranged electrical components within the switch cabinet, thus reducing the reliability of the partial discharge detection device. This application mounts the detector body on the inner top surface of the cabinet and then electrically connects it to a high-frequency pulse current sensor installed inside the mounting housing via a connecting cable. When the device performs discharge detection, the mounting housing can be moved along a preset trajectory by a position adjustment mechanism, which expands the detection range of the high-frequency pulse current sensor installed inside the mounting housing for the discharge situation inside the cabinet and improves the reliability of the partial discharge detection device.

[0109] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A discharge detection device for a switchgear, characterized in that, include: Cabinet, support plate, mounting bracket, mounting port, mounting shell, connecting rod, high-frequency pulse current sensor, detector, position adjustment mechanism, first device to be tested and second device to be tested; The support plate is fixedly installed inside the cabinet, and the top of the support plate is provided with an installation port, which is slidably connected to the first device to be tested. The mounting bracket is fixedly installed on the top of the support plate, and the mounting bracket is fixedly connected to the second device to be tested; The high-frequency pulse current sensor is connected to the mounting housing via the connecting rod; The detector and the high-frequency pulse current sensor are electrically connected via a connecting wire; The position adjustment mechanism is fixedly installed on both sides of the mounting shell, and is used to respond to the received start level signal and drive the mounting shell to move up and down according to a preset movement trajectory; The position adjustment mechanism includes a mounting plate, a first motor, and a sliding plate; The mounting plates are symmetrically connected to the two side walls inside the cabinet. The mounting plate is provided with a guide rail consisting of interconnected vertical grooves, horizontal grooves and diagonal grooves; Each of the vertical slots is equipped with a sliding column, and a second motor is fixedly connected to the end of one of the sliding columns; The second output shaft end of the second motor is fixedly connected to the mounting housing; The first motor is fixedly connected to the bottom of the support plate, and the first output shaft end of the first motor passes through the support plate and is rotatably connected to the top surface inside the cabinet through a threaded rod; The sliding plate is slidably connected to the inner wall of the cabinet, and the surface of the sliding plate is provided with a threaded through hole that is threadedly connected to the threaded rod. The side wall of the sliding plate is provided with a through inclined guide opening that is slidably connected to the sliding column; The mounting housing includes a detection port, an arc-shaped groove, a baffle plate, and a linkage mechanism; The arc-shaped groove is disposed on the inner wall of the detection port to protect the high-frequency pulse current sensor; The arc-shaped groove is slidably connected to the baffle plate, and the arc-shaped groove and the groove wall of the baffle plate are fixedly connected by a first spring. The linkage mechanism is symmetrically arranged on the surface of the shield plate, and is used to link the shield plate to slide out of the arc groove to block the detection port.

2. The discharge detection device for switchgear according to claim 1, characterized in that, The detector includes a detector body, a wire winding and unwinding mechanism, and a conductive mechanism; The wire winding and unwinding mechanism is installed on both sides of the detector body and is used to perform wire winding and unwinding operations during the movement of the mounting shell. The conductive mechanism is disposed on the surface of the wire take-up and take-down mechanism; The conductive mechanism is electrically connected to the detector body via a first conductive post.

3. The discharge detection device for switchgear according to claim 1, characterized in that, The mounting plate includes a one-way limiting mechanism, a pushing mechanism, and a control mechanism; The one-way limiting mechanism is installed in the inclined groove; The pushing mechanism is installed in the guide rail and is fixedly connected to the second device under test, and is used to push the second device under test to slide along the mounting port; The control mechanism is installed in the vertical groove and the inclined groove respectively, and is used to control the operation of the first motor and the electric cylinder on the support plate.

4. The discharge detection device for switchgear according to claim 3, characterized in that, The unidirectional limiting mechanism includes a first mounting groove, a second mounting groove, a first trapezoidal block, and a second trapezoidal block; The first mounting slot is installed in the vertical slot, and the second mounting slot is installed in the inclined slot; The first mounting groove and the first trapezoidal block are slidably connected by a second spring; The second mounting slot is slidably connected to the second trapezoidal block by a third spring.

5. The discharge detection device for switchgear according to claim 2, characterized in that, The cable winding and unwinding mechanism includes a mounting post, a third mounting slot, a third motor, and a storage housing; The mounting posts are installed on both sides of the detector body, and the mounting posts are fixedly connected to the storage shell; The third mounting slot is installed on both sides of the detector body, and the third mounting slot is fixedly connected to the third motor; The third motor output shaft end is provided with a second conductive post, and the end of the second conductive post penetrates through the storage shell.

6. The discharge detection device for switchgear according to claim 3, characterized in that, The pushing mechanism includes a sliding port, a fourth mounting slot, and a linkage plate; The sliding port is mounted on the support plate, and the sliding port and the mounting port are in communication with each other; The sliding port is slidably connected to the linkage plate, and the top of the linkage plate is fixedly connected to the bottom of the second device to be tested; The fourth mounting slot is mounted on the support plate, and the electric cylinder is fixedly connected to the fourth mounting slot.

7. The discharge detection device for switchgear according to claim 3, characterized in that, The control mechanism includes a fifth mounting slot, a pressure switch, and a third trapezoidal block; The fifth mounting slot is mounted on the guide rail, and the fifth mounting slot is fixedly connected to the pressure switch; The third trapezoidal block is fixedly connected to the pressure receiving end of the pressure switch; The pressure switch is electrically connected to the first motor.

8. The discharge detection device for switchgear according to claim 2, characterized in that, The conductive mechanism includes an L-shaped plate and a conductive ring; The L-shaped plate is installed on both sides of the detector body, and the L-shaped plate is fixedly connected to the conductive ring; The conductive ring is nested and connected to the first conductive post; The conductive ring is equipped with a current-carrying wire that is electrically connected to the detector body.

Images