A transformer winding insulation characteristic testing device

Abstract

The application relates to the technical field of transformer testing, and relates to a transformer winding insulation characteristic testing device, which comprises a front support, a cylinder support is arranged on the front support, a push cylinder is fixedly installed on the cylinder support, a push frame is fixedly connected to the output end of the push cylinder, and a spacing adjusting mechanism is arranged in the push frame. The spacing adjusting mechanism can adjust the spacing of the testing terminals in the equipment according to the spacing of winding terminals of different sizes, then the push cylinder is used to elastically press the testing terminals on the winding terminals, manual adjustment and fixing on the site are not needed, and the testing efficiency is improved. During the terminal pressing process, the pressure balancing mechanism is used to keep the butt joint pressure of the two terminals consistent, the testing precision is improved, and during the testing process, the clamping mechanism is used to tightly press the winding terminals on the testing terminals, so that the resistance of the connecting part is prevented from changing due to equipment vibration during the testing process.

Description

Technical Field

[0001] This invention belongs to the field of transformer testing technology, specifically relating to a transformer winding insulation characteristic testing device. Background Technology

[0002] Transformer windings are the core structure of a transformer, composed of electrolytic copper with good conductivity. During transformer operation, alternating current is passed through the primary winding, creating an alternating magnetic field. This magnetic field cuts through the secondary winding, inducing an electromotive force. Then, through electromagnetic induction, electrical energy is transferred from the primary to the secondary winding, achieving voltage transformation. Transformer windings operate in extreme environments with high voltage and high current. If the insulation system fails, it can lead to internal short circuits, potentially causing explosions and fires. Therefore, insulation characteristic testing equipment is needed during production. During this testing, test terminals need to be connected to the external terminals of the winding. However, the position of the winding terminals changes with transformer models. To ensure accurate alignment, personnel need to clamp and fix the terminals on-site, affecting testing efficiency. Manually fixing the test terminals can lead to unstable connections due to operation, and vibrations during equipment operation can cause changes in the resistance of the connection points, affecting the testing accuracy. Therefore, designing a transformer winding insulation characteristic testing device is essential. Summary of the Invention

[0003] The purpose of this invention is to provide a transformer winding insulation characteristic testing device with a simple structure and reasonable design in order to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions:

[0005] A transformer winding insulation characteristic testing device includes a front support, a cylinder support mounted on the front support, a push cylinder fixedly mounted on the cylinder support, a push frame fixedly connected to the output end of the push cylinder, a spacing adjustment mechanism in the push frame, a pressure balancing mechanism in the spacing adjustment mechanism, a clamping mechanism on the pressure balancing mechanism, the front support fixed to a rear housing, a control cabinet and a testing module mounted on the rear housing, a control module in the control cabinet, and a display screen on the rear housing.

[0006] The spacing adjustment mechanism includes a fixed plate fixed on a pusher frame, two sliding plates slidably connected to the fixed plate, an adjusting rack fixedly connected in a groove on the sliding plate, and a transmission unit provided on the fixed plate. The pressure balancing mechanism includes an inner channel in the sliding plate, the inner channel being filled with magnetic steel balls, an adaptive mechanism provided on the sliding plate, an anti-detachment ring fixed at one end of the inner channel, the anti-detachment ring slidably connected to a floating support, one end of the floating support being attached to the magnetic steel balls, and an elastic pressing mechanism provided at the other end of the floating support.

[0007] As a further optimization of the present invention, the transmission unit includes a bearing seat fixed on a fixed plate, a transmission worm gear rotatably connected in the bearing seat, an adjusting worm gear being fitted onto the transmission worm gear, the adjusting worm gear being rotatably connected to the fixed plate, the adjusting worm gear meshing with an adjusting rack, one end of the transmission worm gear being fixedly connected to the output end of an adjusting motor, and the adjusting motor being fixed in a push frame.

[0008] As a further optimization of the present invention, the adaptive mechanism includes an air pump fixed on a sliding plate on one side. The output end of the air pump is connected to a sliding frame through a pipe. The sliding frame is slidably connected to the sliding plate, and an air inlet sleeve is slidably connected in the sliding plate on which the air pump is installed. The air inlet sleeve is in communication with the sliding frame. A sliding shell is slidably connected in the air inlet sleeve, and the sliding shell slides in the inner channel of the sliding plate on the other side.

[0009] As a further optimization of the present invention, the elastic pressing mechanism includes a top pressure spring fixed on the floating support, and one end of the top pressure spring is fixed on the protective sleeve.

[0010] As a further optimization of the present invention, the protective sleeve is slidably connected in the floating support, and the protective sleeve is provided with test terminals, which are connected to the test module.

[0011] As a further optimization of the present invention, the clamping mechanism includes a fixing frame sleeved on the protective sleeve, and a clamping gear is rotatably connected to the fixing frame.

[0012] As a further optimization of the present invention, a clamping rack is meshed on the clamping gear, the clamping rack is fixed on the clamping sleeve, and a sliding track on one side of the clamping rack is slidably connected to a limiting plate, the limiting plate being fixed on one side of the inner wall of the fixing frame.

[0013] As a further optimization of the present invention, the fixing frame is symmetrically provided with support plates, and the support plates are slidably connected in a slide rail opened on the other side of the clamping rack.

[0014] As a further optimization of the present invention, a motor bracket is provided on the fixed frame, a clamping motor is fixedly installed on the motor bracket, a connecting belt is wound around the roller provided at the output end of the clamping motor, and the connecting belt is wound around the connecting sleeve on the clamping gear.

[0015] As a further optimization of the present invention, the top of the front bracket is symmetrically provided with mounting brackets, and the front bracket is provided with a protective mechanism. The protective mechanism includes a support rod fixed in the front bracket, a support slider slidably connected to the support rod, and a protective plate provided between the support sliders.

[0016] The beneficial effects of this invention are as follows:

[0017] In this invention, during the rotation of the transmission worm gear driven by the adjusting motor, the left and right transmission worm gears respectively drive two sets of adjusting worm gears to rotate synchronously in opposite directions. Then, by utilizing the meshing action of the adjusting worm gears and the adjusting rack, the left and right sliding plates move closer or further apart synchronously. The spacing of the test terminals in the equipment can be adjusted according to the spacing of winding terminals of different sizes. Then, in conjunction with the push cylinder, the test terminals are elastically pressed onto the winding terminals, eliminating the need for manual adjustment and fixation on site, thus improving testing efficiency.

[0018] During testing, the pusher cylinder drives the pusher frame forward. During the movement, the two test terminals on the left and right sides contact and press against the terminals of the winding in sequence. During the pressing process, the pressure of the test terminals will act on the pressing spring, which in turn drives the floating support to squeeze the magnetic steel ball in the inner channel. The magnetic steel ball transmits the pressure of the contact surface of the terminals on both sides, so that the docking pressure of the terminals on both sides is consistent, thus improving the accuracy of the test.

[0019] During the rotation of the clamping motor-driven roller, the clamping gear is synchronously driven to rotate by the connecting belt. The rotation of the clamping gear will mesh and drive the clamping rack to move, so that the clamping sleeves on both sides move closer to each other. The inclined inner wall of the clamping sleeve will press the winding terminals tightly onto the test terminals from both sides, so as to avoid the connection parts from loosening due to the vibration of the equipment during the test, which would cause the resistance of the connection parts to change. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the present invention after the protective plate has been removed;

[0022] Figure 3 This is a partial structural schematic diagram of the present invention;

[0023] Figure 4 This is a partial three-dimensional structural diagram of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection relationship of the spacing adjustment mechanism in this invention;

[0025] Figure 6 This is an exploded structural diagram of the clamping mechanism in this invention;

[0026] Figure 7 This is a schematic diagram showing the installation position of the magnetic steel ball in this invention;

[0027] Figure 8 This is a schematic diagram of the assembly structure of the pressure balancing mechanism in this invention.

[0028] In the diagram: 1. Front bracket; 2. Rear housing; 3. Control cabinet; 4. Spacing adjustment mechanism; 5. Protective mechanism; 6. Mounting bracket; 7. Pressure balancing mechanism; 8. Cylinder bracket; 9. Clamping mechanism; 10. Display screen; 11. Push cylinder; 12. Push frame; 13. Protective sleeve; 14. Test terminal; 15. Test module; 41. Fixing plate; 42. Sliding plate; 43. Adjusting rack; 44. Adjusting worm gear; 45. Transmission worm gear; 46. 51. Adjusting motor; 52. Support rod; 53. Support slider; 54. Protective plate; 75. Inner channel; 76. Magnetic steel ball; 77. Floating support; 78. Anti-detachment ring; 79. Air inlet sleeve; 70. Sliding shell; 71. Sliding frame; 72. Air pump; 73. Top pressure spring; 94. Fixed frame; 95. Clamping gear; 96. Connecting belt; 97. Clamping motor; 98. Clamping rack; 99. Support plate; 90. Limiting plate. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0030] Example: Please refer to Figures 1-8A transformer winding insulation characteristic testing device includes a front support 1, on which a cylinder bracket 8 for mounting a push cylinder 11 is fixed. A push frame 12 is fixedly connected to the output end of the push cylinder 11. A slide rod on one side of the push frame 12 is slidably connected to a square block at the bottom of the cylinder bracket 8. A spacing adjustment mechanism 4 for adjusting the distance between test terminals 14 is provided in the push frame 12. A pressure balancing mechanism 7 is provided in the spacing adjustment mechanism 4 to balance the contact pressure between the two sets of terminals. A clamping mechanism 9 is provided on the pressure balancing mechanism 7 to press the winding terminals onto the test terminals 14 during the test. The front support 1 is fixed to a rear housing 2, on which a control cabinet 3 and a test module 15 are provided. 15 is existing technology and will not be described in detail. The control cabinet 3 is equipped with a control module, which is used to control the orderly operation of the drive structure and test module 15 in the equipment. The rear box 2 is equipped with a display screen 10 to display the test status. The top of the front bracket 1 is symmetrically equipped with mounting brackets 6 for fixing the transformer windings, and the front bracket 1 is equipped with a protective mechanism 5. The protective mechanism 5 includes a support rod 51 fixed in the front bracket 1. The support rod 51 is slidably connected to the support slider 52 through a linear bearing. A protective plate 53 is set between the support sliders 52. The support rod 51 supports the support slider 52, which makes it easy to adjust the position of the protective plate 53 during the test. The protective plate 53 protects the test area and prevents the staff from accidentally touching it, thus improving the safety of the equipment.

[0031] Please see Figures 4-8 The spacing adjustment mechanism 4 includes a fixed plate 41 bolted to the push frame 12. Two sliding plates 42 are slidably connected to the guide rails symmetrically arranged on the fixed plate 41. An adjusting rack 43 is fixedly connected to the grooves opened on the sliding plates 42. The fixed plate 41 is provided with a transmission unit for driving the sliding plates 42 to move. The transmission unit includes a bearing seat fixed on the fixed plate 41. A transmission worm 45 is rotatably connected to the bearing seat through a bearing. An adjusting turbine 44 is connected to the transmission worm 45. The adjusting turbine 44 is rotatably connected to the fixed plate 41 and meshes with the adjusting rack 43. One end of the transmission worm 45 is fixedly connected to the output end of the adjusting motor 46. The adjusting motor 46 is fixed in the push frame 12. During the process of the adjusting motor 46 driving the transmission worm 45 to rotate, the left and right transmission worms 45 respectively drive the two sets of adjusting turbines 44 to rotate synchronously in opposite directions. Then, the meshing action of the adjusting turbine 44 and the adjusting rack 43 drives the left and right sliding plates 42 to move closer or further away synchronously.

[0032] Please see Figures 6-8The pressure balancing mechanism 7 includes an inner channel 71 formed in the sliding plate 42, the inner channel 71 being filled with magnetic steel balls 72. An adaptive mechanism is provided on the sliding plate 42. One end of the inner channel 71 is fixed with an anti-detachment ring 74, which is slidably connected to a floating support 73. The anti-detachment ring 74 prevents the floating support 73 from detaching from the sliding plate 42. One end of the floating support 73 is magnetically attached to the magnetic steel ball 72 closest to the floating support 73. The other end of the floating support 73 is provided with an elastic pressing mechanism. The adaptive mechanism includes components fixed to one side of the sliding plate 42. The air pump 78 has its output end connected to a sliding frame 77 via a pipe. The sliding frame 77 is slidably connected to a slide rail on a sliding plate 42. An air inlet sleeve 75 is slidably connected to the sliding plate 42 where the air pump 78 is installed. The air inlet sleeve 75 is in communication with the sliding frame 77. One end of the air inlet sleeve 75 is magnetically attached to a magnetic steel ball 72 closest to the air inlet sleeve 75. A sliding shell 76 is slidably connected to the air inlet sleeve 75. The sliding shell 76 slides in the inner channel 71 of the sliding plate 42 on the other side. The elastic pressing mechanism includes a top pressing mechanism fixed on a floating support 73. Spring 79, one end of the top pressure spring 79 is fixed to the protective sleeve 13, the protective sleeve 13 is slidably connected in the floating support 73, and the protective sleeve 13 is provided with test terminals 14 for connecting the winding terminals. The test terminals 14 are connected to the test module 15. Before the test, the distance between the two sliding plates 42 is adjusted by the spacing adjustment mechanism 4 so that the test terminals 14 on the left and right sliding plates 42 correspond to the winding terminals. Then, the air pump 78 fills or evacuates air into the space between the air inlet sleeve 75 and the sliding shell 76 through the sliding frame 77, and then adjusts the air inlet sleeve. The total length of 75 and sliding shell 76 keeps the total length of the left and right floating supports 73 extending out of sliding plate 42 constant. Then, the cylinder 11 is pushed to move the push frame 12 forward a fixed distance. During the movement, the left and right test terminals 14 contact and press against the terminals of the winding in sequence. During the pressing process, the pressure of the test terminals 14 will act on the pressing spring 79, which will in turn drive the floating support 73 to squeeze the magnetic steel ball 72 in the inner channel 71. The magnetic steel ball 72 transmits the pressure of the contact surface of the terminals on both sides, so that the docking pressure of the terminals on both sides is consistent, which improves the accuracy of the test.

[0033] Please see Figures 4-8The clamping mechanism 9 includes a fixed frame 91 fixedly sleeved on the protective sleeve 13, and a clamping gear 92 rotatably connected to the fixed frame 91. Two sets of clamping racks 95 are symmetrically meshed on the clamping gear 92. The clamping racks 95 are fixed on the clamping sleeve 96. A sliding track on one side of the clamping rack 95 is slidably connected to a limiting plate 98. The limiting plate 98 is fixed on one side of the inner wall of the fixed frame 91. Support plates 97 are symmetrically arranged on the fixed frame 91, and the support plates 97 are slidably connected to a sliding track on the side of the other clamping rack 95. The support plates 97 and the limiting plates 98 limit the clamping racks 95 from both sides, so that the clamping racks 95 can only move along the trajectory of their own upper sliding track. During the movement, the clamping racks 95 can always be engaged with clamping gear 92. A motor bracket is fixedly installed on the fixed frame 91, and a clamping motor 94 is fixedly installed on the motor bracket. A connecting belt 93 is wound around the roller at the output end of the clamping motor 94. The connecting belt 93 is wound around the connecting sleeve on the clamping gear 92. During the process of the clamping motor 94 driving the roller to rotate, the connecting belt 93 synchronously drives the clamping gear 92 to rotate. The rotation of the clamping gear 92 will engage and drive the clamping rack 95 to move, so that the clamping sleeves 96 on both sides move closer to each other. The inclined inner wall of the clamping sleeve 96 presses the winding terminal tightly onto the test terminal 14 from both sides, so as to avoid the connection part from loosening due to the vibration of the equipment during the test and causing the resistance of the connection part to change.

[0034] It should be noted that, in the use of this transformer winding insulation characteristic testing equipment, the transformer winding to be tested is first fixed on the mounting frame 6. Then, the protective plate 53 is moved to protect the test area, preventing accidental contact by personnel and improving equipment safety. Subsequently, as the motor 46 drives the transmission worm gear 45 to rotate, the left and right transmission worm gears 45 respectively drive two sets of adjusting worm gears 44 to rotate synchronously in opposite directions. The meshing action of the adjusting worm gears 44 and the adjusting rack 43 drives the left and right sliding plates 42 to move synchronously closer or further apart. The spacing of the test terminals 14 in the equipment can be adjusted according to the spacing of winding terminals of different sizes. During the spacing adjustment process, the air pump 78 fills or removes air into the space between the air inlet sleeve 75 and the sliding shell 76 through the sliding frame 77. By adjusting the total length of the air inlet sleeve 75 and the sliding shell 76, the total length of the left and right floating supports 73 extending out of the sliding plates 42 remains constant. Then, in conjunction with the push cylinder 11, the test terminals 14 are elastically pressed onto the winding terminals, eliminating the need for manual adjustment and fixing on-site. The testing efficiency is improved. During the process of elastically pressing the test terminal 14 onto the winding terminal, the two test terminals 14 on the left and right sides contact and press against the winding terminal in turn. During the pressing process, the pressure of the test terminal 14 will act on the pressing spring 79, which will drive the floating support 73 to squeeze the magnetic steel ball 72 in the inner channel 71. The magnetic steel ball 72 transmits the pressure of the contact surface of the terminals on both sides, so that the docking pressure of the terminals on both sides is consistent, which improves the accuracy of the test. Before the test, the clamping motor 94 drives the roller to rotate, and the connecting belt 93 drives the clamping gear 92 to rotate synchronously. The rotation of the clamping gear 92 will mesh and drive the clamping rack 95 to move, so that the clamping sleeves 96 on both sides move closer synchronously. The inclined inner wall of the clamping sleeve 96 presses the winding terminal tightly onto the test terminal 14 from both sides, avoiding the connection part from loosening due to the vibration of the equipment during the test, which would cause the resistance of the connection part to change. Then, the winding terminal is energized through the test terminal 14. During the process, the test module 15 collects voltage and current data and feeds it back to the control module for characteristic analysis. The analysis results are simultaneously fed back to the display screen 10.

[0035] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, 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 modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A transformer winding insulation characteristic testing device, comprising a front support, characterized in that: A cylinder bracket is provided on the front support, a push cylinder is fixedly installed on the cylinder bracket, a push frame is fixedly connected to the output end of the push cylinder, a spacing adjustment mechanism is provided in the push frame, a pressure balancing mechanism is provided in the spacing adjustment mechanism, a clamping mechanism is provided on the pressure balancing mechanism, the front support is fixed on the rear housing, a control cabinet and a test module are provided on the rear housing, a control module is provided in the control cabinet, and a display screen is provided on the rear housing; The spacing adjustment mechanism includes a fixed plate fixed on a push frame, two sliding plates slidably connected to the fixed plate, an adjusting rack fixedly connected to the sliding plate, and a transmission unit provided on the fixed plate. The pressure balancing mechanism includes an inner channel formed in the sliding plate, the inner channel being filled with magnetic steel balls, an adaptive mechanism provided on the sliding plate, an anti-detachment ring fixed at one end of the inner channel, the anti-detachment ring slidably connected to a floating support, one end of the floating support being attached to the magnetic steel balls, and an elastic pressing mechanism provided at the other end of the floating support. The adaptive mechanism includes an air pump fixed on a sliding plate on one side. The output end of the air pump is connected to a sliding frame through a pipe. The sliding frame is slidably connected to the sliding plate. An air inlet sleeve is slidably connected in the sliding plate on which the air pump is installed. The air inlet sleeve is in communication with the sliding frame. A sliding shell is slidably connected in the air inlet sleeve. The sliding shell slides in the inner channel of the sliding plate on the other side.

2. The transformer winding insulation characteristic testing device according to claim 1, characterized in that: The transmission unit includes a bearing seat fixed on a fixed plate, a transmission worm gear rotatably connected in the bearing seat, an adjusting worm gear mating with the transmission worm gear, the adjusting worm gear rotatably connected to the fixed plate, the adjusting worm gear meshing with an adjusting rack, one end of the transmission worm gear being fixedly connected to the output end of an adjusting motor, and the adjusting motor being fixed in a push frame.

3. The transformer winding insulation characteristic testing device according to claim 1, characterized in that: The elastic pressing mechanism includes a top pressure spring fixed on the floating support, with one end of the top pressure spring fixed on the protective sleeve.

4. The transformer winding insulation characteristic testing device according to claim 3, characterized in that: The protective sleeve is slidably connected to the floating support, and the protective sleeve is provided with test terminals, which are connected to the test module.

5. The transformer winding insulation characteristic testing device according to claim 4, characterized in that: The clamping mechanism includes a fixed frame sleeved on the protective sleeve, and a clamping gear is rotatably connected to the fixed frame.

6. The transformer winding insulation characteristic testing device according to claim 5, characterized in that: A clamping rack is meshed with the clamping gear, the clamping rack is fixed on the clamping sleeve, and a sliding track on one side of the clamping rack is slidably connected to a limiting plate, the limiting plate being fixed to one side of the inner wall of the fixing frame.

7. The transformer winding insulation characteristic testing device according to claim 6, characterized in that: The fixed frame is symmetrically provided with support plates, and the support plates are slidably connected in a slide rail opened on the other side of the clamping rack.

8. A transformer winding insulation characteristic testing device according to claim 6, characterized in that: The fixed frame is provided with a motor bracket, and a clamping motor is fixedly installed on the motor bracket. A connecting belt is wound around the roller at the output end of the clamping motor, and the connecting belt is wound around the connecting sleeve on the clamping gear.

9. The transformer winding insulation characteristic testing device according to claim 1, characterized in that: The top of the front bracket is symmetrically provided with mounting brackets, and the front bracket is provided with a protective mechanism. The protective mechanism includes a support rod fixed in the front bracket, a support slider slidably connected to the support rod, and a protective plate provided between the support sliders.

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