Transformer testing device
By using heating resistor wire and temperature sensor in the transformer test device to simulate different temperature environments, the problem that the prior art cannot test the transformer at different temperatures is solved, and accurate evaluation and temperature control of the transformer's working state are achieved.
Patent Information
- Application Number
- CN202420717121.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-04-09
AI Technical Summary
The existing transformer testing device cannot test the working state of the transformer at different ambient temperatures, and cannot measure the parameter characteristics of the transformer in different temperature environments.
A transformer testing device is designed to heat and adjust the ambient temperature through a heating resistor wire, and control the temperature in the insulation cover using a temperature sensor and a controller to ensure that the transformer can be tested under different temperature environments. The device includes a test bench, a controller, a heating resistor wire, a temperature sensor, a voltage regulator, a current detector and a blowing device, which can simulate different temperature environments and test the working state of the transformer.
It realizes effective testing of the transformer at different ambient temperatures, improves the accuracy and reliability of the test, and can circulate flowing air in a confined space for heating, ensuring uniform and controllable temperatures, and displays test data on the display.
Smart Images
Figure CN222354047U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformer testing, in particular to a transformer testing device. Background Art
[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. At present, my country's power grid is a high-voltage power transmission system. When using electricity, it is necessary to use a transformer to convert high-voltage electricity into low-voltage electricity. Due to my country's vast territory and the huge temperature difference between the north and the south, the high temperature has a greater impact on the use of transformers.
[0003] At present, transformers need to be tested by a test device before use to determine the parameter characteristics of the transformer. However, when testing the transformer, only the wires on the tester are connected to the terminals of the transformer to be tested, and then the power is turned on for testing. Since the transformer is only tested at room temperature, the working state of the transformer at different ambient temperatures cannot be tested, so the parameter characteristics of the transformer in different temperature environments cannot be measured. For this reason, we propose a transformer testing device. Utility Model Content
[0004] In view of the deficiency that the existing transformer test cannot test the working status of the transformer under different ambient temperatures, the utility model provides a transformer testing device, which has the advantages of being able to heat and adjust the transformer testing environment temperature through a heating resistor wire and test the working status of the transformer under different ambient temperatures, thereby solving the problems raised in the above-mentioned background technology.
[0005] To achieve the above purpose, the utility model is implemented by the following technical solutions: a transformer testing device, including a test bench and a controller, a storage table is provided on the top of the test bench, the bottom of the storage table is fixed to the test bench by a plurality of support rods, the top of the storage table is used to place the transformer, a heat preservation cover is provided above the test bench, and the storage table and the transformer are both placed in the heat preservation cover;
[0006] An exhaust duct is provided on one side of the bottom of the storage table, and the side of the exhaust duct is fixed to the support rod through a second fixing plate, a mounting rod is installed at one end inside the exhaust duct, both ends of the mounting rod are fixed to the inner wall of the exhaust duct through a fixing frame, and a plurality of strip-shaped support sheets are equidistantly installed on the side of the mounting rod, a heating resistance wire is provided in the exhaust duct, the heating resistance wire is fixed to the strip support sheet, the heating resistance wire is connected to the controller through a wire, and a blowing device is provided at the other end inside the exhaust duct;
[0007] It also includes a voltage regulator, a voltage detector and a current detector connected to the controller. The voltage regulator, the voltage detector and the current detector are respectively connected to the transformer through wires.
[0008] Optionally, a heat preservation plate is provided on one side of the storage table, the heat preservation plate is fixed on the top of the test table, and a box is installed on the side of the heat preservation plate away from the storage table, a cover is installed on the side of the box close to the opening, a partition is installed in the box, and a mounting plate is installed on the top of the partition;
[0009] The voltage regulator, the controller, the voltage detector, and the current detector are respectively mounted on the mounting plate;
[0010] A temperature sensor is installed on one side of the top of the storage table, and the temperature sensor is connected to the controller through a wire.
[0011] Optionally, the blowing device includes a bearing seat fixed to the other end of the exhaust duct by a bracket, a drive shaft is rotatably connected to the bearing seat, one end of the drive shaft is connected to a fan, and the other end of the drive shaft extends outside the exhaust duct, and a drive motor connected to a controller is installed on the side of the box, and the output shaft of the drive motor is connected to the end of the drive shaft.
[0012] Optionally, a clamping mechanism for positioning the transformer is provided on both sides of the storage table, the clamping mechanism comprising first fixing plates symmetrically fixed on both sides of the top of the storage table, a screw rod is threadedly connected to the side surface of each first fixing plate, and clamping plates are rotatably connected to the opposite surfaces of the two screw rods, and the transformer is located between the two clamping plates;
[0013] At least one guide rod is installed on the side surface of each clamping plate, and the other end of each guide rod slides through the side surface of the first fixing plate.
[0014] Optionally, an opening is provided on one side of the heat-insulating cover, and an end of the heat-insulating cover close to the opening is sealed and connected to the side surface of the heat-insulating plate.
[0015] Optionally, the bottom edge of the insulation cover is installed with a surround, and a limit frame matching the surround is installed on the top of the test bench. The surround is located in the limit frame, the side of the surround is gap-matched with the inner surface of the limit frame, and the bottom of the surround is fixed to the top of the test bench by magnetic attraction.
[0016] Optionally, there is a distance between one end of the exhaust duct close to the insulation board and the insulation board.
[0017] Optionally, insulating rubber sleeves are installed on the surfaces of the storage table and the partition.
[0018] Optionally, a display is installed at the other end of the top of the test bench, and the controller is connected to the display via a data cable.
[0019] Compared with the prior art, the utility model can heat the ambient temperature in the heat preservation cover by means of a heating resistance wire when in use, and detect the temperature by means of a temperature sensor and transmit it to a controller. The ambient temperature in the heat preservation cover can be controlled by means of the controller, and the working state of the transformer at different ambient temperatures can be tested, and the test effect is good. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0021] Figure 2 This is a schematic diagram of the test bench structure of the utility model.
[0022] Figure 3 It is a schematic diagram of the internal structure of the exhaust duct of the utility model.
[0023] Figure 4 It is a structural side view of the utility model.
[0024] In the figure: 1. test bench; 2. display; 3. cover plate; 4. insulation board; 5. insulation cover; 6. edge; 7. limit frame; 8. storage table; 9. screw rod; 10. first fixed plate; 11. guide rod; 12. support rod; 13. clamping plate; 14. temperature sensor; 15. voltage regulator; 16. mounting plate; 17. box; 18. partition; 19. drive motor; 20. controller; 21. voltage detector; 22. current detector; 23. exhaust duct; 24. second fixed plate; 25. fixing frame; 26. mounting rod; 27. strip support sheet; 28. heating resistor wire; 29. fan; 30. bearing seat; 31. drive shaft. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] See also Figures 1 to 4 The utility model provides a technical solution: a transformer testing device, including a test bench 1, a storage table 8 is provided on the top of the test bench 1, the bottom of the storage table 8 is fixed on the test bench 1 through a plurality of support rods 12, a transformer is fixed on the top of the storage table 8 through a clamping mechanism, a heat preservation cover 5 is provided above the test bench 1, and the storage table 8 and the transformer are placed in the heat preservation cover 5;
[0027] like Figure 2As shown, the clamping mechanism includes first fixing plates 10 symmetrically fixed on both sides of the top of the storage platform 8, and the side of each first fixing plate 10 is threadedly connected with a screw rod 9, and the opposite surfaces of the two screw rods 9 are rotatably connected with a clamping plate 13, and the transformer is located between the two clamping plates 13. In actual use, after placing the transformer on the storage platform 8, the staff can rotate the screw rod 9. Since the screw rod 9 and the first fixing plate 10 are threadedly matched, when the screw rod 9 is rotated, the clamping plate 13 will be driven to move horizontally, so that the transformer to be tested can be clamped and fixed;
[0028] It should be noted that, in order to facilitate the rotation of the screw rod 9, a rotation handle is installed at one end of the two screw rods 9, and the staff rotates the screw rod 9 by rotating the rotation handle.
[0029] like Figure 2 As shown, at least one guide rod 11 is installed on the side of each clamping plate 13, and the other end of each guide rod 11 slides through the side of the first fixing plate 10. Under the action of the guide rod 11, the clamping plate 13 can be limited, and the clamping plate 13 can be prevented from rotating with the screw rod 9 and can also be kept stable.
[0030] like Figure 1 As shown, a heat preservation plate 4 is provided on one side of the storage table 8, and the heat preservation plate 4 is fixed on the top of the test bench 1, and a box 17 is installed on the side of the heat preservation plate 4 away from the storage table 8, and a cover plate 3 is installed on the side of the box 17 close to the opening, and a partition 18 is installed in the box 17, and a mounting plate 16 is installed on the top of the partition 18, and a voltage regulator 15, a controller 20, a voltage detector 21, and a current detector 22 are installed on the top of the mounting plate 16, respectively, and the controller 20 is connected to the voltage regulator 15, the controller 20, the voltage detector 21, and the current detector 22 through wires, and the voltage regulator 15, the voltage detector 21, and the current detector 22 are all connected to the transformer through wires, and a display 2 is installed on the other end of the top of the test bench 1, and the controller 20 is connected to the display 2 through a data cable. The controller 20 is a host or a control mainboard. During the test, the voltage regulator 15, the voltage detector 21, and the current detector 22 are connected to the transformer to be tested through wires, and then the circuit is turned on. The voltage detector 21 and the current detector 22 can detect the current and voltage flowing through the transformer, and the detection data can be transmitted to the display 2 through the controller 20 for display, which is convenient for the staff to observe.
[0031] like Figure 3As shown, an exhaust tube 23 is provided on one side of the bottom of the storage table 8, and the side of the exhaust tube 23 is fixed to the support rod 12 through a second fixing plate 24, and a mounting rod 26 is installed at one end of the exhaust tube 23, and both ends of the mounting rod 26 are fixed to the inner wall of the exhaust tube 23 through a fixing frame 25, and a plurality of strip-shaped support sheets 27 are equidistantly installed on the side of the mounting rod 26, and a heating resistor 28 is provided in the exhaust tube 23, and the heating resistor 28 is fixed on the strip-shaped support sheet 27, and a blowing device is provided at the other end of the exhaust tube 23. The heating resistor 28 is arranged in a spiral shape, and a channel for air flow is formed between two adjacent strip-shaped support sheets 27, so that the wind blown in by the blowing device can flow along the channel while being fully heated by the heating resistor 28, so that the heat can be quickly and evenly dispersed in the heat preservation cover 5, which is used to test the transformer at different temperature environments;
[0032] The following is a specific structure of the blowing device, that is, the blowing device includes a bearing seat 30 fixed to the other end of the exhaust cylinder 23 by a bracket, a driving shaft 31 is rotatably connected to the bearing seat 30, the bearing seat 30 and the driving shaft 31 are connected through a bearing, one end of the driving shaft 31 is connected to the fan 29, and the other end of the driving shaft 31 extends outside the exhaust cylinder 23. A driving motor 19 connected to the controller is installed on the side of the box 17, and the output shaft of the driving motor 19 is connected to the end of the driving shaft 31. Figure 4 As shown, there is a certain distance between the exhaust duct 23 and the insulation board 4, so that during use, the air in the insulation cover 5 can be sucked in from one end of the exhaust duct 23 and discharged from the other end under the action of the fan 29, and the heated air can circulate in the insulation cover 5, so that the temperature in the insulation cover 5 remains uniform.
[0033] like Figure 1 As shown, a temperature sensor 14 is installed on one side of the top of the storage table 8, and the temperature sensor 14 and the heating resistor 28 are connected to the controller 20 through a wire. By installing the temperature sensor 14 on the storage table 8, the temperature of the transformer test environment can be detected, so that the working state of the transformer at different ambient temperatures can be accurately tested.
[0034] Specifically, when the utility model is used, the staff places the transformer to be tested on the storage table 8, and then rotates the screw rod 9 so that the clamping plate 13 clamps and fixes the transformer, and then connects the voltage regulator 15, the voltage detector 21, and the current detector 22 to the corresponding terminal of the transformer to be tested through wires, and then covers the transformer to be tested with the heat preservation cover 5 so that the transformer is in a closed space, and then controls the driving motor 19 and the heating resistance wire 28 to work, and the driving motor 19 drives the fan 29 to rotate, and the air in the heat preservation cover 5 is sucked in from one end of the exhaust pipe 23, and after being heated by the heating resistance wire 28, the air is sucked in. The heated air is then discharged from the other end of the exhaust duct 23. The heated air circulates in the sealed space to quickly heat the sealed space, and the temperature in the sealed space is detected by the temperature sensor 14. When the preset temperature is reached, the controller 20 controls the heating resistor 28 to stop heating, and at the same time turns on the test circuit to test the working condition of the transformer at the preset temperature, and displays the test data on the display 2. The controller 20 can accurately control the temperature value of the heating resistor 28 in the sealed space through the temperature sensor 14, and then the transformer can be tested under different environmental temperature conditions.
[0035] Further, such as Figure 1 As shown, an opening is provided on one side of the heat preservation cover 5, and the end of the heat preservation cover 5 close to the opening is sealed and connected to the side of the heat preservation board 4, so that during inspection, when the heat preservation cover 5 is covered on the transformer, the heat preservation cover 5 will not hinder the driving shaft 31.
[0036] Further, such as Figure 1 As shown, the bottom edge of the thermal insulation cover 5 is installed with a surrounding edge 6, and a limiting frame 7 matching the surrounding edge 6 is installed on the top of the test bench 1. The surrounding edge 6 is located in the limiting frame 7, and the side of the surrounding edge 6 is gap-matched with the inner surface of the limiting frame 7. The limiting frame 7 can limit the surrounding edge 6 to prevent the thermal insulation cover 5 from shaking horizontally, and the bottom of the surrounding edge 6 is fixed to the top of the test bench 1 by magnetic attraction. Magnets are installed at the corresponding positions of the bottom of the surrounding edge 6 and the top of the test bench 1, and the two are adsorbed and fixed by the magnets.
[0037] Further, such as Figure 1 As shown, insulating rubber sleeves are installed on the surfaces of the storage table 8 and the partition 18. This can prevent workers from receiving electric shocks due to leakage during the transformer testing process, thereby improving the safety of the test.
[0038] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.
[0039] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A transformer testing device, comprising a test bench (1) and a controller (20), wherein a storage platform (8) is provided on the top of the test bench (1), the bottom of the storage platform (8) is fixed to the test bench (1) by a plurality of support rods (12), and the top of the storage platform (8) is used to place a transformer, characterized in that: A heat preservation cover (5) is provided above the test bench (1), and the storage table (8) and the transformer are both placed in the heat preservation cover (5); An exhaust tube (23) is provided on one side of the bottom of the storage table (8), and the side of the exhaust tube (23) is fixed to the support rod (12) through a second fixing plate (24), and a mounting rod (26) is installed at one end inside the exhaust tube (23), and both ends of the mounting rod (26) are fixed to the inner wall of the exhaust tube (23) through a fixing frame (25), and a plurality of strip-shaped support sheets (27) are equidistantly installed on the side of the mounting rod (26), and a heating resistance wire (28) is provided inside the exhaust tube (23), and the heating resistance wire (28) is fixed on the strip-shaped support sheet (27), and the heating resistance wire (28) is connected to the controller (20) through a wire, and a blowing device is provided at the other end inside the exhaust tube (23); It also includes a voltage regulator (15), a voltage detector (21), and a current detector (22) connected to the controller (20); the voltage regulator (15), the voltage detector (21), and the current detector (22) are respectively connected to the transformer via wires.
2. A transformer testing device according to claim 1, characterized in that: A heat preservation plate (4) is provided on one side of the storage platform (8), the heat preservation plate (4) is fixed on the top of the test platform (1), and a box (17) is installed on the side of the heat preservation plate (4) away from the storage platform (8), a cover plate (3) is installed on the side of the box (17) close to the opening, a partition plate (18) is installed in the box (17), and a mounting plate (16) is installed on the top of the partition plate (18); The voltage regulator (15), the controller (20), the voltage detector (21), and the current detector (22) are respectively mounted on the mounting plate (16); A temperature sensor (14) is installed on one side of the top of the storage table (8), and the temperature sensor (14) is connected to the controller (20) via a wire.
3. A transformer testing device according to claim 2, characterized in that: The blowing device comprises a bearing seat (30) fixed to the other end of the exhaust pipe (23) through a bracket, a driving shaft (31) is rotatably connected to the bearing seat (30), one end of the driving shaft (31) is connected to the fan (29), and the other end of the driving shaft (31) extends outside the exhaust pipe (23), and a driving motor (19) connected to the controller is installed on the side of the box body (17), and the output shaft of the driving motor (19) is connected to the end of the driving shaft (31).
4. A transformer testing device according to claim 1, characterized in that: A clamping mechanism for positioning the transformer is provided on both sides of the storage platform (8), the clamping mechanism comprising first fixing plates (10) symmetrically fixed on both sides of the top of the storage platform (8), a screw rod (9) is threadedly connected to the side surface of each first fixing plate (10), and the opposite surfaces of the two screw rods (9) are rotatably connected to clamping plates (13), and the transformer is located between the two clamping plates (13); At least one guide rod (11) is installed on the side of each clamping plate (13), and the other end of each guide rod (11) slides through the side of the first fixing plate (10).
5. A transformer testing device according to claim 1, characterized in that: An opening is provided on one side of the heat-insulating cover (5), and an end of the heat-insulating cover (5) close to the opening is sealed and connected to the side of the heat-insulating plate (4).
6. A transformer testing device according to claim 5, characterized in that: The bottom edge of the heat-insulating cover (5) is provided with a surrounding edge (6), and a limiting frame (7) matching the surrounding edge (6) is provided on the top of the test bench (1). The surrounding edge (6) is located in the limiting frame (7), and the side surface of the surrounding edge (6) is gap-matched with the inner surface of the limiting frame (7), and the bottom of the surrounding edge (6) is fixed to the top of the test bench (1) by means of magnetic attraction.
7. A transformer testing device according to claim 1, characterized in that: There is a distance between one end of the exhaust pipe (23) close to the heat preservation board (4) and the heat preservation board (4).
8. A transformer testing device according to claim 1, characterized in that: Insulating rubber sleeves are installed on the surfaces of the storage table (8) and the partition (18).
9. A transformer testing device according to claim 1, characterized in that: A display (2) is installed at the other end of the top of the test bench (1), and the controller (20) is connected to the display (2) via a data line.