A multifunctional fusion detection device for partial discharge of enclosed dry-type transformers

Abstract

The present invention discloses a multifunctional fusion detection device for partial discharge of a closed dry-type transformer, which relates to the technical field of discharge detection equipment. The device comprises a discharge detector and a test line. An interface is provided on the back of the discharge detector. The test line comprises a connector, an insulating handle and a high-voltage line. The device comprises: a fixed frame, which is fixedly mounted on the surface of the discharge detector; a push rod, which slides through the inner and outer walls of the fixed frame and moves in a parallel direction; a movable plate, which is fixedly mounted on the surface of the push rod and has a placement groove on the top of the movable plate; and a rubber pad, which is fixedly mounted on the inner wall of the placement groove. The closing of the protective cover not only improves the closed safety space, but also uses a pressure block to automatically fix the test line to ensure a stable and reliable connection.

Description

Technical Field

[0001] The present invention relates to the technical field of discharge detection equipment, and in particular to a multifunctional fusion detection device for partial discharge of a closed dry-type transformer. Background Art

[0002] The multifunctional integrated detection device for partial discharge of dry-type transformers is an advanced device that integrates multiple detection technologies. It is designed to monitor partial discharge phenomena inside dry-type transformers in real time and accurately, thereby evaluating their insulation status and preventing potential failures.

[0003] The patent with patent announcement number CN221039304U relates to a partial discharge detector, including a detector body and a connecting line. The detector body is provided with a placement slot, the placement slot is equipped with an operating panel, the operating panel is equipped with a connecting panel, the connecting panel is equipped with a fixed panel, the operating panel is provided with an operating cavity, the connecting panel and the fixed panel are provided with a telescopic cavity, the fixed panel and the connection panel are equipped with a movable rod, the movable rod is equipped with a traction panel, the traction panel is equipped with a clamping rod, the fixed panel is provided with a clamping slot, the clamping rod is clamped with the clamping slot, the movable rod is equipped with a pressing block, the movable rod is equipped with a fixed plate, and the movable rod is equipped with a telescopic spring. The above-mentioned partial discharge detector solves the problem that the existing partial discharge detector and the detection line are placed separately, which is inconvenient to carry, and the detection line cannot be adjusted according to the length required by the power equipment through the cooperation of the placement slot and the connecting panel.

[0004] The above patent has a function of being easy to carry. The placement slot and the connection plate are used to solve the problem that the partial discharge detector and the detection line are placed separately, which makes it inconvenient to carry. However, during the actual detection process, the inspector needs to strictly follow the requirements to connect the discharge detector and the detection line. Since the connection process involves electrical contact, there are certain risks, which may lead to unsafe situations during the operation. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a multifunctional fusion detection device for partial discharge of a sealed dry-type transformer, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a multifunctional fusion detection device for partial discharge of a closed dry-type transformer, comprising a discharge detector and a test line, wherein an interface is provided on the back of the discharge detector, the test line comprises a connector, an insulating handle and a high-voltage line, one end of the test line is connected to the discharge detector, and the other end is connected to a coupling capacitor, and then indirectly connected to the dry-type transformer through the coupling capacitor, comprising: a fixed frame, the fixed frame is fixedly mounted on the surface of the discharge detector; a push rod, the push rod slides through the inner and outer walls of the fixed frame, the push rod moves in a parallel direction, and the push rod has Good insulation; a movable plate, the movable plate is fixedly mounted on the surface of the push rod, and a placement slot is provided on the top of the movable plate. When the push rod is pushed, the push rod drives the movable plate to move toward the discharge detector, so that the test line moves toward the discharge detector synchronously; a rubber pad, the rubber pad is fixedly mounted on the inner wall of the placement slot; a protective cover, the protective cover rotates and passes through the inner and outer walls of the fixed frame, and the protective cover has good insulation; a rectangular block, the rectangular block is fixedly mounted on the surface of the protective cover, and when the protective cover is closed, the rotation of the protective cover will drive the rectangular block to rotate synchronously; a limit plate, the limit plate is rotatably mounted on the side of the fixed frame away from the discharge detector.

[0007] According to the above technical solution, a gantry is slidingly passed through the top of the movable plate, a No. 1 spring is arranged between the gantry and the movable plate, and the bearing seat drives the gantry to move downward, and the downward movement of the gantry stretches the No. 1 spring, and the No. 1 spring is deformed by the stretching. A bearing seat is fixedly installed on the top of the gantry, and a roller is rotatably installed on the inner wall of the bearing seat. A pressure block is fixedly installed on the side of the gantry close to the rubber pad, and the gantry has good insulation properties.

[0008] According to the above technical solution, a lower groove is provided on the surface of the fixed frame, an upper groove is provided on the surface of the protective cover, and a torsion spring is provided between the limit plate and the fixed frame. The limit plate is rotated to a predetermined position. During the rotation, the limit plate stretches the torsion spring and releases the limit plate. At this time, the torsion spring releases the stored force to drive the limit plate to rotate back to the initial position. The pressure block is provided with an arc surface 1 on the side close to the rubber pad.

[0009] According to the above technical solution, the fixed frame is provided with a pushing device for automatically pulling out the test line and a stabilizing device for improving the detection stability; the pushing device includes a linear slide, a sliding block, a No. 2 spring, a linkage plate and a connecting rod. After the gantry moves down to the specified position, it continues to move and contact the linkage plate. At this time, the gantry pushes the linkage plate to move synchronously. The linear slide is fixed through the bottom of the inner wall of the fixed frame, and the sliding block is slidably installed on the circumferential surface of the linear slide. The No. 2 spring is arranged between the sliding block and the linear slide. The sliding block moves to stretch the No. 2 spring, and the No. 2 spring is deformed by the stretching. The deformed No. 2 spring begins to accumulate elastic potential energy. The linkage plate is fixedly installed on the top of the sliding block, and the connecting rod is fixedly installed on the bottom of the linkage plate. The linkage plate is provided with an inclined surface one on the side away from the No. 2 spring.

[0010] According to the above technical solution, the bottom of the linear slide is slidably penetrated by a carrying frame, a No. 3 spring is arranged between the carrying frame and the linear slide, and a roller is rotatably penetrated on the inner wall of the carrying frame. When the inclined surface moves, it contacts the roller, drives the roller to rotate through friction, and forces the roller to move downward.

[0011] According to the above technical solution, the stabilizing device includes an L-shaped frame, a rectangular plate, a rotating shaft, a rubber plate and a spring sheet. The rectangular plate contacts the rubber plate and applies a thrust to the rubber plate. The rubber plate rotates in the direction of the spring sheet under the action of the thrust. The L-shaped frame is fixedly mounted on the top of the inner wall of the fixed frame, the rectangular plate is slidably mounted on the inner wall of the L-shaped frame, the rotating shaft is fixedly mounted inside the L-shaped frame, and the rubber plate is rotatably mounted on the circumferential surface of the rotating shaft. One end of the spring sheet is fixedly mounted on the inner wall of the rubber plate, and the other end is fixedly connected to the inner wall of the L-shaped frame. A blind hole is opened at the top of the rectangular plate, and the inner wall of the connecting rod contacts the blind hole. When the connecting rod moves toward the T-shaped plate, it will synchronously drive the rectangular plate to move along the L-shaped frame.

[0012] According to the above technical solution, a contact block is fixedly installed on one side of the rectangular plate close to the rubber plate, and a T-shaped plate slides through the top of the L-shaped frame. The T-shaped plate moves in a vertical direction, and the movement of the contact block applies an upward supporting force to the T-shaped plate, and the T-shaped plate rises under the support.

[0013] According to the above technical solution, a rectangular groove is provided on the surface of the L-shaped frame, a second inclined surface is provided on the side of the contact block close to the T-shaped plate, and a second arc surface is provided on the bottom of the T-shaped plate. When the contact block passes through the rectangular groove during movement, its second inclined surface contacts the second arc surface of the T-shaped plate.

[0014] The present invention provides a multifunctional fusion detection device for partial discharge of enclosed dry-type transformers. It has the following beneficial effects:

[0015] (1) In this closed dry-type transformer partial discharge multifunctional fusion detection device, the limit plate rotates to the initial position and contacts the rectangular block to form a limit. Through rapid limit, it can not only prevent the protective cover from accidentally opening due to accidental contact during the test, but also ensure that the test line is in a closed safety space when connected. At the same time, the movement of the gantry drives the pressure block to move downward. By closing the protective cover, not only the closed safety space is increased, but also the pressure block is used to automatically fix the test line to ensure a stable and reliable connection.

[0016] (2) The closed dry-type transformer partial discharge multifunctional fusion detection device, after reset, the roller is close to the linkage plate to form a limit. The linkage plate is limited by the reset of the roller to ensure that the linkage plate will not interfere with the detection during partial discharge detection and prepare for pushing. At the same time, the No. 2 spring releases elastic potential energy to drive the sliding block to reset, and the push is triggered by pulling down the mounting frame. The tester can choose whether to enable the push according to the on-site needs, which significantly improves the work efficiency.

[0017] (3) In the enclosed dry-type transformer partial discharge multifunctional fusion detection device, the spring sheet applies reverse elastic force to the rubber plate, so that the rubber plate fits tightly with the rectangular plate. The reverse elastic force applied by the spring sheet enhances the stability of the rectangular plate after it reaches the designated position, and reduces the problem of unstable connection caused by vibration during movement. At the same time, the T-shaped plate provides additional support for the movable plate, and the stability of the movable plate is enhanced by providing additional support for the movable plate through the T-shaped plate, thereby ensuring the stability of the test line after it is connected to the discharge detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front structure of the discharge detector of the present invention;

[0019] Figure 2 This is a schematic diagram of the fixed frame position structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the back structure of the discharge detector of the present invention;

[0021] Figure 4 This is a schematic diagram of the position structure of the portal frame and the linkage plate of the present invention;

[0022] Figure 5 This is a schematic diagram of the portal frame structure of the present invention;

[0023] Figure 6 This is a schematic structural diagram of the pushing device and the stabilizing device of the present invention;

[0024] Figure 7 This is a schematic diagram of the cross-sectional position structure of the linkage plate of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the mounting frame of the present invention;

[0026] Figure 9 Schematic diagram of the internal structure of the L-shaped frame of the present invention.

[0027] In the figure: 1. Discharge detector; 2. Test line; 3. Fixed frame; 4. Push rod; 5. Movable plate; 6. Rubber pad; 7. Protective cover; 8. Rectangular block; 9. Limit plate; 10. Door frame; 11. Spring No. 1; 12. Bearing seat; 13. Roller; 14. Pressure block; 151. Linear slide; 152. Sliding block; 153. Spring No. 2; 154. Linkage plate; 155. Connecting rod; 156. Carrying frame; 157. Spring No. 3; 158. Roller; 161. L-shaped frame; 162. Rectangular plate; 163. Rotating shaft; 164. Rubber plate; 165. Shrapnel; 166. Contact block; 167. T-shaped plate. DETAILED DESCRIPTION

[0028] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 5 , one embodiment of the present invention is: a closed dry-type transformer partial discharge multifunctional fusion detection device, including a discharge detector 1 and a test line 2, the back of the discharge detector 1 is provided with an interface, the test line 2 includes a connector, an insulating handle and a high-voltage line, including: a fixed frame 3, the fixed frame 3 is fixedly mounted on the surface of the discharge detector 1; a push rod 4, the push rod 4 slides through the inner and outer walls of the fixed frame 3, and the push rod 4 moves in a parallel direction; a movable plate 5, the movable plate 5 is fixedly mounted on the surface of the push rod 4, and a placement groove is opened on the top of the movable plate 5; a rubber pad 6, the rubber pad 6 is fixedly mounted on the inner wall of the placement groove; a protective cover 7, the protective cover 7 rotates and penetrates the inner and outer walls of the fixed frame 3; a rectangular block 8, the rectangular block 8 is fixedly mounted on the surface of the protective cover 7; a limit plate 9, the limit plate 9 is rotatably mounted on the side of the fixed frame 3 away from the discharge detector 1, and the closing of the protective cover 7 not only improves the enclosed safety space, but also uses the pressure block 14 to automatically fix the test line 2 to ensure a stable and reliable connection.

[0030] A gantry 10 slides through the top of the movable plate 5, and a No. 1 spring 11 is provided between the gantry 10 and the movable plate 5. A bearing seat 12 is fixedly installed on the top of the gantry 10, and a roller 13 is rotatably installed on the inner wall of the bearing seat 12. A pressure block 14 is fixedly installed on the side of the gantry 10 close to the rubber pad 6. Through quick limiting, it can not only prevent the protective cover 7 from being accidentally opened due to accidental contact during the test, but also ensure that the test line 2 is in a closed safe space when connected.

[0031] A lower groove is provided on the surface of the fixed frame 3, an upper groove is provided on the surface of the protective cover 7, a torsion spring is provided between the limit plate 9 and the fixed frame 3, and an arc surface is provided on the side of the pressure block 14 close to the rubber pad 6. By providing the upper groove and the lower groove, it is convenient for the tester to organize the test line 2, which helps to improve the cleanliness of the testing environment.

[0032] When the present embodiment is working, the tester places the test line 2 into the placement groove of the movable plate 5 in sequence, ensuring that the insulating handle of the test line 2 and the rubber pad 6 are in close contact, and at the same time, the high-voltage line and the lower groove are in stable contact; after the placement is completed, the tester rotates the limit plate 9 to the predetermined position. During the rotation, the limit plate 9 stretches the torsion spring, and then closes the protective cover 7, so that the upper groove of the protective cover 7 is in contact with the high-voltage line; at the same time, the rotation of the protective cover 7 will drive the rectangular block 8 to rotate synchronously. When the rectangular block 8 rotates to the specified position, the tester releases the limit plate 9. At this time, the torsion spring releases the stored force, driving the limit plate 9 to rotate back to the initial position and contacting with the rectangular block 8 to form a limit, thereby fixing the protective cover 7. Through rapid limit, it can prevent the protective cover 7 from being accidentally opened due to accidental contact during the test process, and can also ensure that the test line 2 is in a closed safe space when connected. When the tester closes the protective cover 7, its rotation will contact the roller 13 and push the roller 13 to move downward. The movement of the roller 13 drives the bearing seat 12 to move downward. The bearing seat 12 drives the gantry 10 to move downward, so that the No. 1 spring 11 is stretched. At the same time, the movement of the gantry 10 drives the pressure block 14 to move downward until the pressure block 14 contacts the insulating handle of the test line 2. As the protective cover 7 continues to close, the pressure block 14 applies continuous pressure to the insulating handle to ensure that the insulating handle is in close contact with the rubber pad 6, thereby enhancing the stability of the contact. When the protective cover 7 is fixed, the tester pushes the push rod 4, and the push rod 4 drives the movable plate 5 to move toward the discharge detector 1, so that the test line 2 moves toward the discharge detector 1 synchronously. In this process, the friction between the roller 13 and the protective cover 7 causes the roller 13 to roll until the connector of the test line 2 is accurately inserted into the interface of the discharge detector 1. The tester then starts the discharge detector 1 and performs partial discharge detection. After the detection is completed, the tester only needs to push the push rod 4 to reset and then pull out the test line 2. The closing of the protective cover 7 not only improves the enclosed safety space, but also uses the pressure block 14 to automatically fix the test line 2 to ensure a stable and reliable connection.

[0033] See also Figures 1-9, based on the above embodiment, in another embodiment of the present invention, a pushing device for automatically pulling out the test line 2 and a stabilizing device for improving the detection stability are provided on the fixed frame 3; the pushing device includes a linear slide 151, a sliding block 152, a No. 2 spring 153, a linkage plate 154 and a connecting rod 155, the linear slide 151 is fixedly passed through the bottom of the inner wall of the fixed frame 3, the sliding block 152 is slidably installed on the circumferential surface of the linear slide 151, the No. 2 spring 153 is arranged between the sliding block 152 and the linear slide 151, the linkage plate 154 is fixedly installed on the top of the sliding block 152, and the connecting rod 155 is fixedly installed on the bottom of the linkage plate 154, and the linkage plate 154 is provided with an inclined surface 1 on the side away from the No. 2 spring 153, and the push is triggered by pulling down the carrying frame 156. The tester can choose whether to enable the push according to the on-site needs, which significantly improves the work efficiency.

[0034] The bottom of the linear slide 151 is slidably penetrated by a mounting frame 156, and a No. 3 spring 157 is provided between the mounting frame 156 and the linear slide 151. A roller 158 is rotatably penetrated on the inner wall of the mounting frame 156. The linkage plate 154 is limited by resetting the roller 158 to ensure that the linkage plate 154 will not interfere with the detection during partial discharge detection and prepare for pushing.

[0035] The stabilizing device includes an L-shaped frame 161, a rectangular plate 162, a rotating shaft 163, a rubber plate 164 and a spring piece 165. The L-shaped frame 161 is fixedly mounted on the top of the inner wall of the fixed frame 3, the rectangular plate 162 is slidably mounted on the inner wall of the L-shaped frame 161, the rotating shaft 163 is fixedly mounted inside the L-shaped frame 161, and the rubber plate 164 is rotatably mounted on the circumferential surface of the rotating shaft 163. One end of the spring piece 165 is fixedly mounted on the inner wall of the rubber plate 164, and the other end is fixedly connected to the inner wall of the L-shaped frame 161. A blind hole is opened at the top of the rectangular plate 162, and the inner wall of the connecting rod 155 contacts the blind hole. The spring piece 165 applies a reverse elastic force to enhance the stability of the rectangular plate 162 after reaching the specified position, thereby reducing the problem of unstable connection caused by vibration during movement.

[0036] A contact block 166 is fixedly installed on one side of the rectangular plate 162 close to the rubber plate 164, and a T-shaped plate 167 slides through the top of the L-shaped frame 161. The T-shaped plate 167 moves in the vertical direction, providing additional support for the movable plate 5 through the T-shaped plate 167, thereby enhancing the stability of the movable plate 5 and ensuring the stability of the test line 2 after being connected to the discharge detector 1.

[0037] A rectangular groove is provided on the surface of the L-shaped frame 161, and a second inclined surface is provided on the side of the contact block 166 close to the T-shaped plate 167. A second arc surface is provided at the bottom of the T-shaped plate 167. By providing the second inclined surface and the second arc surface, the frictional resistance when the contact block 166 and the T-shaped plate 167 contact is reduced, ensuring that the contact block 166 can smoothly drive the T-shaped plate 167 to rise.

[0038] When this embodiment is working, after the gantry 10 moves down to the specified position, it continues to move toward the discharge detector 1 and contacts the linkage plate 154. At this time, the gantry 10 pushes the linkage plate 154 to move synchronously, and the linkage plate 154 drives the sliding block 152 and the connecting rod 155 to move synchronously. The sliding block 152 moves and stretches the No. 2 spring 153, causing it to accumulate elastic potential energy; at the same time, the inclined surface 1 of the linkage plate 154 moves and contacts the roller 158, and drives the roller 158 to rotate through friction. Due to the inclination of the inclined surface 1, the roller 158 is forced to move down while rotating, and the roller 158 moves to drive the carrying frame 156 to move down, and the carrying frame 156 moves to squeeze the No. 3 spring 157. When the linkage plate 154 reaches the specified position, its inclined surface 1 and roller 158 are out of contact. At this time, the No. 3 spring 157 releases its elastic potential energy, pushing the carrying frame 156 and roller 158 to reset. The reset roller 158 is close to the linkage plate 154 and close to the No. 2 spring The second spring 153 is pulled out of the way and the second spring 154 is pulled out of the way, and the second spring 154 is pulled out of the way and the second spring 154 is pulled out of the way.

[0039] When the connecting rod 155 moves toward the T-shaped plate 167, it will simultaneously drive the rectangular plate 162 to move along the L-shaped frame 161. The L-shaped frame 161 provides a stable supporting force for the rectangular plate 162 and transmits the supporting force to the connecting rod 155 through the blind hole, ensuring the stability of the movement of the connecting rod 155. When the rectangular plate 162 moves to the preset position, the rectangular plate 162 contacts the rubber plate 164. As the rectangular plate 162 continues to move, a continuously increasing thrust is applied to the rubber plate 164. During this process, the rubber plate 164 rotates toward the spring plate 165 under the action of the thrust. The rotating rubber plate 164 squeezes the spring plate 165, and the deformed spring plate 165 applies a reverse elastic force to the rubber plate 164, so that the rubber plate 164 is tightly fitted with the rectangular plate 162, thereby improving the stability effect. A reverse elastic force is applied to enhance the stability of the rectangular plate 162 after it reaches the specified position, and to reduce the problem of unstable connection caused by vibration during movement. When the rectangular plate 162 moves, it drives the contact block 166 to move toward the T-shaped plate 167. The contact block 166 passes through the rectangular groove during movement, and its second inclined surface contacts the second arc surface of the T-shaped plate 167, causing the contact block 166 to continue to move and exert an upward supporting force on the T-shaped plate 167. The T-shaped plate 167 rises under the support and contacts the movable plate 5 during the rising process; at this time, the T-shaped plate 167 provides additional supporting force for the movable plate 5, thereby improving the stability of the test line 2 during the connection process. The T-shaped plate 167 provides additional supporting force for the movable plate 5, thereby enhancing the stability of the movable plate 5, and thus ensuring the stability of the test line 2 after being connected to the discharge detector 1.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional fusion detection device for partial discharge of a closed dry-type transformer, comprising a discharge detector and a test line, wherein the back of the discharge detector is provided with an interface, and the test line comprises a connector, an insulating handle and a high-voltage line, characterized in that: include: A fixed frame, wherein the fixed frame is fixedly mounted on the surface of the discharge detector; A push rod, the push rod slidingly passes through the inner and outer walls of the fixed frame, and the push rod moves in a parallel direction; A movable plate, the movable plate is fixedly mounted on the surface of the push rod, and a placement groove is provided on the top of the movable plate; A rubber pad, the rubber pad being fixedly mounted on the inner wall of the placement groove; A protective cover, the protective cover rotatably passing through the inner and outer walls of the fixed frame; A rectangular block, the rectangular block being fixedly mounted on the surface of the protective cover; A limiting plate, the limiting plate being rotatably mounted on a side of the fixed frame away from the discharge detector; The fixed frame is provided with a pushing device for automatically pulling out the test line and a stabilizing device for improving the detection stability; The stabilizing device includes an L-shaped frame, a rectangular plate, a rotating shaft, a rubber plate and a spring. A contact block is fixedly installed on the side of the rectangular plate close to the rubber plate. A T-shaped plate slides through the top of the L-shaped frame. The T-shaped plate moves in a vertical direction. A rectangular groove is provided on the surface of the L-shaped frame. A second inclined surface is provided on the side of the contact block close to the T-shaped plate. A second arc surface is provided at the bottom of the T-shaped plate.

2. A multifunctional fusion detection device for partial discharge of a sealed dry-type transformer according to claim 1, characterized in that: A gantry frame slides through the top of the movable plate, a No. 1 spring is provided between the gantry frame and the movable plate, a bearing seat is fixedly installed on the top of the gantry frame, a roller is rotatably installed on the inner wall of the bearing seat, and a pressure block is fixedly installed on the side of the gantry frame close to the rubber pad.

3. The multifunctional fusion detection device for partial discharge of a sealed dry-type transformer according to claim 2, characterized in that: The surface of the fixed frame is provided with a lower groove, and the surface of the protective cover is provided with an upper groove. The characteristic is that a torsion spring is provided between the limit plate and the fixed frame, and the side of the pressure block close to the rubber pad is provided with an arc surface.

4. The multifunctional fusion detection device for partial discharge of a sealed dry-type transformer according to claim 3 is characterized in that: The pushing device includes a linear slide, a sliding block, a No. 2 spring, a linkage plate and a connecting rod. The linear slide is fixed through the bottom of the inner wall of the fixed frame. The sliding block is slidably installed on the circumferential surface of the linear slide. The No. 2 spring is arranged between the sliding block and the linear slide. The linkage plate is fixedly installed on the top of the sliding block. The connecting rod is fixedly installed on the bottom of the linkage plate. The linkage plate has an inclined surface 1 on the side away from the No. 2 spring.

5. The multifunctional fusion detection device for partial discharge of a sealed dry-type transformer according to claim 4 is characterized in that: A carrying frame is slidably passed through the bottom of the linear slide, a No. 3 spring is provided between the carrying frame and the linear slide, and a roller is rotatably passed through the inner wall of the carrying frame.

6. The multifunctional fusion detection device for partial discharge of a sealed dry-type transformer according to claim 5, characterized in that: The L-shaped frame is fixedly mounted on the top of the inner wall of the fixed frame, the rectangular plate is slidably mounted on the inner wall of the L-shaped frame, the rotating shaft is fixedly mounted inside the L-shaped frame, the rubber plate is rotatably mounted on the circumferential surface of the rotating shaft, one end of the spring is fixedly mounted on the inner wall of the rubber plate, and the other end is fixedly connected to the inner wall of the L-shaped frame, a blind hole is opened on the top of the rectangular plate, and the inner wall of the connecting rod is in contact with the blind hole.

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