A transformer withstand voltage test device

Abstract

The present invention relates to the field of transformer testing technology, and specifically to a transformer withstand voltage test device, comprising a supporting base, on which a test platform is fixedly mounted, and further comprising: an enclosure frame, which is fixedly connected to the supporting base, and on which a plurality of spray guns are inserted, and the plurality of spray guns are arranged close to the side of the test platform; a fire extinguishing device, which is fixedly mounted on the enclosure frame, and the fire extinguishing device is also connected to the plurality of spray guns; and a test protection mechanism, which is connected to the enclosure frame and electrically connected to the fire extinguishing device, wherein the test protection mechanism comprises a lifting assembly, a test assembly and a rebound control assembly; the transformer withstand voltage test device of the present invention has a high degree of automation, which can not only enable the test equipment to be quickly separated from the transformer to avoid damage to the test equipment, but also improve the safety of the transformer during the test.

Description

Technical Field

[0001] The invention relates to the technical field of transformer testing, in particular to a transformer withstand voltage testing device. Background Art

[0002] The transformer withstand voltage test device, also known as the transformer induction withstand voltage test device, is a device used to control the output of the medium frequency power supply. This device is a low-voltage control measurement and protection system of the frequency multiplier set, which is used to perform an induction withstand voltage test on the transformer. The induction withstand voltage test is a non-destructive test used to detect whether the insulation capacity of the product is qualified under the transient high voltage that often occurs. This test applies high voltage to the transformer for a certain period of time to ensure that its insulation performance is strong enough. When the transformer leaves the factory, it has not been tested in a long-term harsh environment, nor has it been subjected to long-term testing of the power supply with rated voltage and frequency. Therefore, the transformer may have hidden dangers of insulation failure, which are not much different from transformers with good insulation performance in no-load current and no-load power consumption, so it is difficult to find. The induction withstand voltage test device applies a voltage of more than twice the rated voltage to the transformer, establishes a higher and more concentrated field strength at the longitudinal insulation defect, so that the voltage between the winding turns, layers and segments reaches and exceeds the breakdown voltage at the dielectric defect, thereby reliably detecting the longitudinal insulation performance of the transformer.

[0003] The existing transformer withstand voltage test device, during use, if an emergency such as fire occurs, on the one hand, the test equipment cannot be quickly separated from the transformer, which easily leads to damage to the test equipment. On the other hand, in an emergency, the self-rescue function is not perfect, making the transformer test device unsafe and inconvenient to use. Therefore, in view of the above situation, it is urgent to develop a transformer withstand voltage test device to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The object of the present invention is to provide a transformer withstand voltage test device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A transformer withstand voltage test device comprises a support base, on which a test platform is fixedly mounted, and further comprises:

[0007] An enclosure frame, the enclosure frame is fixedly connected to the support base, and a plurality of spray guns are inserted on the enclosure frame, and the plurality of spray guns are arranged near the side of the test platform;

[0008] A fire extinguishing device, the fire extinguishing device is fixedly mounted on the enclosure frame, and the fire extinguishing device is also connected to the plurality of spray guns;

[0009] and a test protection mechanism, the test protection mechanism is connected to the enclosure frame and electrically connected to the fire extinguishing equipment, wherein the test protection mechanism includes a lifting assembly, a test assembly and a rebound control assembly;

[0010] The lifting assembly is connected to the enclosure frame, the test assembly is connected to the lifting assembly, the rebound control assembly is respectively connected to the fire extinguishing equipment, the lifting assembly and the test assembly, and is electrically connected to the fire extinguishing equipment.

[0011] As a further solution of the present invention: it also includes: a guide platform, which is fixedly connected to the support base and is arranged close to the test platform;

[0012] And a control system, wherein the control system is fixedly mounted on the enclosure frame and electrically connected to the test protection mechanism.

[0013] As a further solution of the present invention: the lifting assembly comprises:

[0014] A telescopic cylinder, the telescopic cylinder is fixedly connected to the enclosure frame;

[0015] A lifting plate, the lifting plate is fixedly connected to the output end of the telescopic cylinder, and both ends of the lifting plate are provided with electromagnetic adsorption parts;

[0016] And a protective guide plate, wherein the protective guide plate is fixedly connected to the enclosure frame, and the protective guide plate is also slidably connected to the electromagnetic adsorption part.

[0017] As a further solution of the present invention: the rebound control component includes:

[0018] A sliding part, wherein the number of the sliding parts is two, the two sliding parts are detachably connected to the two electromagnetic adsorption parts respectively, and are slidably connected to the protection guide plate, and the sliding part is also fixedly connected to the enclosure frame through a rebound spring;

[0019] A buffer plate, the buffer plate is fixedly mounted on the sliding portion;

[0020] and an impact detector, wherein the impact detector is located on the buffer plate and is detachably connected to the enclosure frame, and the impact detector is also electrically connected to the fire extinguishing equipment.

[0021] As a further solution of the present invention: the test component comprises:

[0022] A testing device, wherein the testing device is fixedly connected to the sliding portion via a reset support plate;

[0023] A circular hole, the circular hole is opened on the reset support plate, and the circular hole is sleeved on the telescopic cylinder;

[0024] and a test probe, wherein the test probe is fixedly mounted on the test device.

[0025] As a further solution of the present invention: it also includes: a positioning detection board, the positioning detection board is fixedly connected to the testing device;

[0026] And a monitoring device, the monitoring device is fixedly connected to the positioning detection plate, and a start button and a light-emitting head are also fixedly installed on the monitoring device.

[0027] As a further solution of the present invention: it also includes: an elastic connecting plate, one end of which is fixedly connected to the positioning detection plate, and the other end of which is provided with an abutting portion;

[0028] and an elastic blocking sheet, wherein the elastic blocking sheet is fixedly mounted on the elastic connecting plate, and a light transmission detection hole is provided on the elastic blocking sheet, the light transmission detection hole is arranged opposite to the light emitting head, and a reflective sheet is provided on the elastic blocking sheet.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] When conducting a withstand voltage test on a transformer, first, the transformer to be tested can be installed on the test platform. Then, the lifting assembly can be started to drive the test assembly downward and combine with the transformer to perform a withstand voltage test on the transformer. When the transformer catches fire or the like during the test, the temperature on the surface of the transformer or the input current is detected through feedback from relevant equipment, such as through a temperature detector or other detectors. When the test result is abnormal, the entire equipment can be powered off or only the rebound control assembly can be powered off. The above detection equipment is all existing technology and will not be described in detail here. When the rebound control assembly is powered off, the test equipment can be quickly separated from the abnormal transformer under the drive of the rebound control assembly to avoid damage to the test assembly. In addition, under the control of the rebound control assembly, the working state of the fire extinguishing equipment can be automatically changed. For example, when the rebound force of the rebound control assembly is small, it proves that the upward movement of the rebound control assembly is The distance is small, and the size of the transformer is large. At this time, the rebound control component can increase the power of the fire extinguishing equipment, thereby increasing the amount and injection speed of carbon dioxide sprayed from multiple spray guns, so as to fully extinguish the transformers of different sizes, and save the amount of carbon dioxide. Among them, the fire extinguishing equipment and the spray gun can be connected by a hose, the hose has a certain length, and the spray gun can be unplugged from the enclosure frame, and the spray gun and the enclosure frame can be connected in a plug-in manner, so that according to the fire situation of the transformer, the staff can adjust the spray direction of the spray gun, and can unplug the spray gun from the enclosure frame and spray the fire point, and can select the working state of the spray gun according to actual needs. I will not go into details here. It is simple to operate and has a high degree of automation. It can not only quickly separate the test equipment from the transformer to avoid damage to the test equipment, but also improve the safety of the transformer during the test and provide convenience for the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the transformer withstand voltage testing device according to an embodiment of the present invention from the front side.

[0032] Figure 2 It is a schematic diagram of the three-dimensional structure of the transformer withstand voltage testing device according to an embodiment of the present invention from the rear side.

[0033] Figure 3 It is a schematic diagram of the front view structure of the transformer withstand voltage testing device according to an embodiment of the present invention.

[0034] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the enclosure frame in an embodiment of the present invention.

[0035] Figure 5 It is a schematic diagram of the three-dimensional structure of the impact detector in an embodiment of the present invention.

[0036] Figure 6It is a schematic diagram of the three-dimensional structure of the testing device in the embodiment of the present invention.

[0037] Figure 7 Schematic diagram of the three-dimensional structure of the elastic connecting plate in an embodiment of the present invention.

[0038] Figure 8 Schematic diagram of the three-dimensional structure of the elastic blocking sheet in an embodiment of the present invention.

[0039] In the figure: 1-support base, 2-guide platform, 3-test platform, 4-enclosure frame, 5-fire extinguishing equipment, 6-control system, 7-spray gun, 8-protection guide plate, 9-reset support plate, 10-test equipment, 11-telescopic cylinder, 12-test probe, 13-rebound spring, 14-electromagnetic adsorption part, 15-sliding part, 16-buffer plate, 17-impact detector, 18-lifting plate, 19-circular hole, 20-positioning detection plate, 21-monitoring equipment, 22-start button, 23-elastic connecting plate, 24-elastic blocking plate, 25-light-transmitting detection hole, 26-light-emitting head, 27-abutment part. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0041] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0042] See also Figure 1-Figure 8 A transformer withstand voltage test device provided by an embodiment of the present invention comprises a support base 1, on which a test platform 3 is fixedly mounted, and further comprises:

[0043] An enclosure frame 4, wherein the enclosure frame 4 is fixedly connected to the support base 1, and a plurality of spray guns 7 are inserted on the enclosure frame 4, and the plurality of spray guns 7 are arranged close to the side of the test platform 3;

[0044] A fire extinguishing device 5, wherein the fire extinguishing device 5 is fixedly mounted on the enclosure frame 4, and the fire extinguishing device 5 is also connected to the plurality of spray guns 7;

[0045] and a test protection mechanism, the test protection mechanism is connected to the enclosure frame 4 and electrically connected to the fire extinguishing equipment 5, wherein the test protection mechanism includes a lifting component, a test component and a rebound control component;

[0046] The lifting assembly is connected to the enclosure frame 4 , the test assembly is connected to the lifting assembly, the rebound control assembly is respectively connected to the fire extinguishing equipment 5 , the lifting assembly and the test assembly, and is electrically connected to the fire extinguishing equipment 5 .

[0047] It also includes: a guide platform 2, which is fixedly connected to the support base 1 and is arranged close to the test platform 3;

[0048] And a control system 6, wherein the control system 6 is fixedly mounted on the enclosure frame 4 and electrically connected to the test protection mechanism.

[0049] When performing a withstand voltage test on a transformer, first, the transformer to be tested can be installed on the test platform 3, and then the lifting component can be started to drive the test component to move downward and combine with the transformer to perform a withstand voltage test on the transformer. When the transformer catches fire or the like during the test, the temperature on the surface of the transformer or the input current is detected through feedback from relevant equipment, such as through a temperature detector or other detectors. When the detection result is abnormal, the entire device can be powered off or only the rebound control component can be powered off. The above detection equipment is all prior art and will not be described in detail here. When the rebound control component is powered off, the test equipment 10 can be quickly separated from the abnormal transformer under the drive of the rebound control component to avoid damage to the test component. In addition, under the control of the rebound control component, the working state of the fire extinguishing equipment 5 can be automatically changed. For example, when the rebound force of the rebound control component is small, it proves that the upward movement distance of the rebound control component is small, and The size of the transformer is relatively large. At this time, the rebound control component can increase the working power of the fire extinguishing equipment 5, thereby increasing the amount and injection speed of carbon dioxide sprayed from multiple spray guns 7, so as to fully extinguish the transformers of different sizes and save the amount of carbon dioxide. Among them, the fire extinguishing equipment 5 and the spray gun 7 can be connected by a hose, the hose has a certain length, and the spray gun 7 can be unplugged from the enclosure frame 4, and the spray gun 7 and the enclosure frame 4 can be connected by a plug-in connection method, so that according to the fire situation of the transformer, the staff can adjust the spray direction of the spray gun 7, and can unplug the spray gun 7 from the enclosure frame 4 and spray the fire point. The working state of the spray gun 7 can be selected according to actual needs. No more details will be given here. The operation is simple and the degree of automation is high. It can not only quickly separate the test equipment 10 from the transformer to avoid damage to the test equipment 10, but also improve the safety of the transformer during the test process, providing convenience for the staff.

[0050] In one embodiment of the present invention, see Figure 1-Figure 8 , the lifting assembly comprises:

[0051] A telescopic cylinder 11, wherein the telescopic cylinder 11 is fixedly connected to the enclosure frame 4;

[0052] A lifting plate 18, wherein the lifting plate 18 is fixedly connected to the output end of the telescopic cylinder 11, and both ends of the lifting plate 18 are provided with an electromagnetic adsorption portion 14;

[0053] And a protective guide plate 8, wherein the protective guide plate 8 is fixedly connected to the enclosure frame 4, and the protective guide plate 8 is also slidably connected to the electromagnetic adsorption portion 14.

[0054] The rebound control assembly comprises:

[0055] A sliding part 15, wherein the number of the sliding parts 15 is two, and the two sliding parts 15 are detachably connected to the two electromagnetic adsorption parts 14 respectively, and are slidably connected to the protection guide plate 8, and the sliding part 15 is also fixedly connected to the enclosure frame 4 through a rebound spring 13;

[0056] a buffer plate 16, wherein the buffer plate 16 is fixedly mounted on the sliding portion 15;

[0057] and an impact detector 17 , wherein the impact detector 17 is located on the buffer plate 16 and is detachably connected to the enclosure frame 4 , and the impact detector 17 is also electrically connected to the fire extinguishing equipment 5 .

[0058] The test components include:

[0059] A testing device 10, wherein the testing device 10 is fixedly connected to the sliding portion 15 via a reset support plate 9;

[0060] A circular hole 19, wherein the circular hole 19 is formed on the reset support plate 9, and the circular hole 19 is sleeved on the telescopic cylinder 11;

[0061] and a test probe 12 , wherein the test probe 12 is fixedly mounted on the test device 10 .

[0062] When the transformer to be tested is placed on the test platform 3, the telescopic cylinder 11 is started to push the lifting plate 18 to move downward. At this time, the electromagnetic adsorption part 14 is in a powered state. Under the action of the magnetic attraction between the electromagnetic adsorption part 14 and the sliding part 15, the sliding part 15 can drive the reset support plate 9 and the test equipment 10 to move downward synchronously with the lifting plate 18 until the test probe 12 on the test equipment 10 contacts the pin on the transformer and completes the plug-in. In addition, as the sliding part 15 moves downward, the longer the rebound spring 13 is stretched, and its potential energy is also greater. At this time, it indicates that the size of the transformer is small. When the transformer is abnormal during the test process, the electromagnetic adsorption part 14 is powered off and loses its magnetism. Under the pulling force of the rebound spring 13, the sliding part 15 will slide upward rapidly in the protective guide plate 8, and drive the reset support plate 9 and the test equipment 10 to move upward synchronously, so that The test probe 12 is separated from the transformer. In addition, the circular hole 19 is set to avoid interference with the telescopic cylinder 11 during the upward movement of the resetting support plate 9. At this time, not only is the test probe 12 separated from the transformer quickly, but even if the telescopic cylinder 11 fails, it will not affect the separation of the test probe 12 from the transformer. During the upward movement of the sliding part 15, the buffer plate 16 will collide with the top of the enclosure frame 4. At this time, the impact detector 17 is set to detect the degree of collision between the buffer plate 16 and the enclosure frame 4, and the working state of the fire extinguishing equipment 5 can be controlled according to the degree of collision. Among them, the fire extinguishing equipment 5 can also control the number of spray guns 7 put into work through the solenoid valve, which can be set according to actual needs. In addition, the degree of collision is inversely proportional to the working power of the fire extinguishing equipment 5, thereby saving carbon dioxide while ensuring sufficient fire extinguishing of the transformer.

[0063] In one embodiment of the present invention, see Figure 1-Figure 8 , further comprising: a positioning detection board 20, wherein the positioning detection board 20 is fixedly connected to the testing device 10;

[0064] And a monitoring device 21, wherein the monitoring device 21 is fixedly connected to the positioning detection plate 20, and a start button 22 and a light-emitting head 26 are also fixedly installed on the monitoring device 21.

[0065] It also includes: an elastic connecting plate 23, one end of which is fixedly connected to the positioning detection plate 20, and the other end of the elastic connecting plate 23 is provided with an abutting portion 27;

[0066] And an elastic blocking piece 24, which is fixedly mounted on the elastic connecting plate 23, and a light transmission detection hole 25 is also opened on the elastic blocking piece 24, and the light transmission detection hole 25 is arranged opposite to the light-emitting head 26, and a reflective sheet is also provided on the elastic blocking piece 24.

[0067] During the transformer test, the monitoring device 21 can be put into operation by manually driving the start button 22, and the light head 26 can emit laser. The detection device on the monitoring device 21 can adopt a diffuse reflection photoelectric switch or a feedback reflection photoelectric switch in the photoelectric sensor. As the test device 10 moves downward, when the laser emitted by the light head 26 is blocked, it means that the test probe 12 is facing the pin of the transformer, so as to ensure that the test probe 12 is accurately and quickly plugged into the transformer. After the test probe 12 contacts the transformer, the staff can adjust the abutment portion 27 on the elastic connecting plate 23 to The outer surface of the transformer is in contact with the light head 26, and the light emitted by the light head 26 passes through the light transmission detection hole 25 and shines on the transformer. During the transformer testing process, when the transformer shakes abnormally and the shaking is large, it will drive the elastic connecting plate 23 and the elastic blocking piece 24 to shake. At this time, the light emitted by the light head 26 will be misaligned with the light transmission detection hole 25 and shine on the reflective sheet on the elastic blocking piece 24. When the light emitted by the light head 26 is reflected, under the control of the corresponding sensor, the test operation can be terminated and the staff can be reminded in time, thereby further ensuring the smooth progress of the transformer withstand voltage test.

[0068] It should be noted that in the present invention, unless otherwise clearly specified and limited, the terms "slide", "rotate", "fix", "have" and the like should be understood in a broad sense, for example, it can be a welding connection, a bolt connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A transformer withstand voltage test device, comprising a support base, on which a test platform is fixedly mounted, characterized in that: Also includes: An enclosure frame, the enclosure frame is fixedly connected to the support base, and a plurality of spray guns are inserted on the enclosure frame, and the plurality of spray guns are arranged near the side of the test platform; A fire extinguishing device, the fire extinguishing device is fixedly mounted on the enclosure frame, and the fire extinguishing device is also connected to the plurality of spray guns; and a test protection mechanism, the test protection mechanism is connected to the enclosure frame and electrically connected to the fire extinguishing equipment, wherein the test protection mechanism includes a lifting assembly, a test assembly and a rebound control assembly; The lifting assembly is connected to the enclosure frame, the test assembly is connected to the lifting assembly, the rebound control assembly is connected to the fire extinguishing equipment, the lifting assembly and the test assembly respectively, and is electrically connected to the fire extinguishing equipment; The lifting assembly comprises: a telescopic cylinder, the telescopic cylinder being fixedly connected to the enclosure frame; A lifting plate, the lifting plate is fixedly connected to the output end of the telescopic cylinder, and both ends of the lifting plate are provided with electromagnetic adsorption parts; and a protective guide plate, wherein the protective guide plate is fixedly connected to the enclosure frame and is also slidably connected to the electromagnetic adsorption portion; The rebound control assembly comprises: a sliding part, the number of the sliding parts is two, the two sliding parts are detachably connected to the two electromagnetic adsorption parts respectively, and are slidably connected to the protection guide plate, and the sliding part is also fixedly connected to the enclosure frame through a rebound spring; A buffer plate, the buffer plate is fixedly mounted on the sliding portion; and an impact detector, the impact detector being located on the buffer plate and detachably connected to the enclosure frame, and the impact detector being also electrically connected to the fire extinguishing equipment; When conducting a withstand voltage test on a transformer, the temperature on the transformer surface or the input current is detected by a temperature detector or other detectors. When the test result is abnormal, the electromagnetic adsorption part is powered off and loses its magnetism. Under the tension of the rebound spring, the sliding part quickly slides upward in the protective guide plate, and drives the test assembly to move upward synchronously, so that the test assembly is separated from the transformer; at the same time, in the process of the sliding part moving upward, the impact detector on the buffer plate will collide with the top of the enclosure frame, and the impact detector controls the working state of the fire extinguishing equipment by detecting the degree of collision.

2. The transformer withstand voltage test device according to claim 1, characterized in that: Also includes: A guide platform, which is fixedly connected to the support base and is disposed close to the test platform; And a control system, wherein the control system is fixedly mounted on the enclosure frame and electrically connected to the test protection mechanism.

3. The transformer withstand voltage test device according to claim 1, characterized in that: The test components include: A testing device, wherein the testing device is fixedly connected to the sliding portion via a reset support plate; A circular hole, the circular hole is opened on the reset support plate, and the circular hole is sleeved on the telescopic cylinder; and a test probe, wherein the test probe is fixedly mounted on the test device.

4. The transformer withstand voltage test device according to claim 3, characterized in that: Also includes: A positioning detection plate, wherein the positioning detection plate is fixedly connected to the testing device; And a monitoring device, wherein the monitoring device is fixedly connected to the positioning detection plate, and a start button and a light-emitting head are also fixedly installed on the monitoring device.

5. The transformer withstand voltage test device according to claim 4, characterized in that: Also includes: An elastic connecting plate, one end of which is fixedly connected to the positioning detection plate, and the other end of which is provided with an abutting portion; and an elastic blocking sheet, wherein the elastic blocking sheet is fixedly mounted on the elastic connecting plate, and a light transmission detection hole is provided on the elastic blocking sheet, the light transmission detection hole is arranged opposite to the light emitting head, and a reflective sheet is provided on the elastic blocking sheet.

Images