A transformer short-circuit impedance testing device

Abstract

The present invention discloses a transformer short-circuit impedance testing device, which relates to the technical field of impedance testing instruments. In the present invention, a lifting mechanism is connected between a first box body and a second box body, and a filter belt is connected between the first box body and the second box body. Under the control of the lifting mechanism, the first box body and the second box body can be opened away from each other. With the filtering and isolation after the filter belt is unfolded, and the driving of the air flow by the cooling fans and vortex fans in the first box body and the second box body, the efficient and stable internal heat dissipation of the device can be ensured when it is unfolded for use. Moreover, with the cooperation of the closing of the first box body and the second box body under the control of the lifting mechanism and the covering and locking of the box cover, the device can be folded into a fully enclosed box structure during transportation and carrying, taking into account the efficient protection during transportation and carrying and the efficient heat dissipation during use, and improving the flexible stability of the device to a certain extent during long-term use.

Description

Technical Field

[0001] The present invention relates to the technical field of impedance testing instruments, and in particular to a transformer short-circuit impedance testing device. Background Art

[0002] A transformer short-circuit impedance testing device is an instrument used to detect transformer windings. When a transformer is impacted by a short-circuit current or is mechanically impacted during transportation and installation, by using the transformer short-circuit impedance testing device to test and collect data on winding current, voltage, and power, it is possible to check whether there is any deformation in the transformer windings. Therefore, using a transformer short-circuit impedance testing device for detection is of great significance for determining whether a transformer can be put into operation and is also one of the bases for determining whether a transformer needs to be disassembled and inspected.

[0003] The transformer short-circuit impedance testing devices in the prior art are usually set as portable box structures. To ensure that the testing device can have a long service life and avoid damage to electronic components caused by foreign objects and rainwater invading the inside of the device during transportation, the entire box of the testing device is usually set as a completely enclosed structure. Although this structural feature can effectively improve the external protection performance of the device, it will greatly reduce the efficiency of heat dissipation from the internal heat accumulation during the use of the testing device, and it is easy to interfere with the stability of the transformer short-circuit impedance testing device during actual use.

[0004] Therefore, a transformer short-circuit impedance testing device is proposed to solve some problems existing in the above prior art. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem that the transformer short-circuit impedance testing device in the prior art is set as a closed box structure, resulting in the difficulty of coexisting the safety protection during transportation and the efficient internal heat dissipation during use, which affects the stability of the device during actual use, and to propose a transformer short-circuit impedance testing device.

[0006] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] A transformer short-circuit impedance testing device includes a first box body. A second box body is arranged below the first box body. A box cover covering the first box body is rotatably connected to the rear of the top of the first box body. A lock catch that cooperates with each other is arranged on the front of the first box body and the box cover. A control panel is fixedly inlaid on the top of the first box body. A detection unit is fixedly installed in the second box body. A filter belt is connected around between the first box body and the second box body, and the filter belt is made of a flexible material. A horizontally arranged first air box is fixedly installed at the rear of the top of the first box body, and a first spray hole is opened on the first air box. A first diversion pipe fitting extending into the first box body is fixedly communicated with the bottom of the first air box, and a heat dissipation fan is fixedly installed at the opening position of the first diversion pipe fitting. A horizontally arranged second air box is fixedly installed at the front of the top of the first box body, and a second spray hole is opened on the second air box. A second diversion pipe fitting extending into the second box body is fixedly communicated with the bottom of the second air box, and a scroll fan in the second box body is communicated with the second diversion pipe fitting. Two left-right symmetric lifting mechanisms are arranged between the first box body and the second box body, and a linkage mechanism extending to the top of the first box body is connected between the left and right lifting mechanisms.

[0008] Preferably, the filter belt presents a strip-shaped structure. Magic tapes that are adapted to each other are arranged at both ends of the filter belt. After the two ends of the filter belt are adhered by the magic tapes, an annular belt-shaped structure is formed. Zippers are connected between the upper and lower sides of the filter belt and the first box body and the second box body respectively.

[0009] Preferably, the filter belt is arranged as an inner and outer double-layer structure, and the aperture of the filter holes on the inner layer of the filter belt is set to 1 / 2 of the aperture of the filter holes on its outer layer.

[0010] Preferably, an elastic rope is fixedly installed at the middle position of the inner and outer double-layer structure of the filter belt, and the original length of the elastic rope is set to 4 / 5 of the length of the filter belt.

[0011] Preferably, the first spray hole is opened on the front of the first air box and is flush with the upper surface of the control panel. The second spray hole is opened on the back of the second air box and is flush with the upper surface of the control panel. The first spray hole and the second spray hole are symmetrically arranged front and back.

[0012] Preferably, the opening of the first diversion pipe fitting is arranged at the upper position inside the first box body. An overhead plate is fixedly installed inside the second box body below the detection unit, and through holes evenly distributed are opened on the top of the overhead plate. The second diversion pipe fitting is communicated with the lower space of the overhead plate, and the scroll fan is overheadly arranged above the overhead plate.

[0013] Preferably, the second flow guiding pipe fitting includes a first vertical pipe vertically arranged in the first box body and a second vertical pipe vertically arranged in the second box body. The upper end of the first vertical pipe is fixedly communicated with the second air box, and the lower end of the second vertical pipe is fixedly communicated with the space below the overhead plate. A sleeve is slidably sleeved between the first vertical pipe and the second vertical pipe, and a horizontally arranged partition plate is fixedly installed at the middle position of the front surface of the sleeve. Vertical springs are fixedly installed on both the upper and lower sides of the partition plate. The spring located above is fixedly connected to the bottom edge position of the first box body, and the spring located below is fixedly connected to the top edge position of the second box body.

[0014] Preferably, the lifting mechanism includes a first beam rod longitudinally fixed at the bottom edge position of the first box body and a second beam rod longitudinally fixed at the top edge of the second box body. An X-shaped articulated frame is connected between the first beam rod and the second beam rod. The upper and lower ends behind the X-shaped articulated frame are respectively rotatably connected to the first beam rod and the second beam rod. Chutes are respectively opened at the front positions inside the first beam rod and the second beam rod. Cylindrical rods slidably inserted into the corresponding chutes are respectively fixed at the upper and lower ends in front of the X-shaped articulated frame. A slider rotatably connected to the lower cylindrical rod is slidably installed on the second beam rod. A longitudinally arranged screw rod is rotatably installed on the second beam rod, and the screw rod is threadedly engaged with the slider.

[0015] Preferably, the linkage mechanism includes a transmission rod horizontally rotatably installed in the second box body. First bevel gears are respectively fixed at the front ends of the left and right screw rods. Second bevel gears meshing with the corresponding first bevel gears are respectively fixed at both ends of the transmission rod. A vertically arranged spline shaft is rotatably installed in the second box body, and a third bevel gear meshing with one of the second bevel gears is fixedly installed at the lower end of the spline shaft. A vertically arranged spline sleeve rod is rotatably installed in the first box body, and the spline sleeve rod is movably sleeved outside the upper end of the spline shaft. The internal dimension of the spline sleeve rod is adapted to the external dimension of the spline shaft. The top end of the spline sleeve rod extends to the top of the first box body, and a crank is received in the box cover and is adaptively connected to the top end of the spline sleeve rod.

[0016] Preferably, an elastic airbag is horizontally covered between the first box body and the second box body, and the four corners of the elastic airbag are respectively fixedly connected to the four bottom corners of the first box body and the four top corners of the second box body through pull ropes. Argon is filled in the elastic airbag.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In the present invention, by connecting the lifting mechanism between the first box body and the second box body, and connecting the filter belt between the first box body and the second box body, under the control of the lifting mechanism, the first box body and the second box body can be opened away from each other. With the filtering and isolation after the filter belt is unfolded, and the driving of the air flow by the cooling fans and vortex fans in the first box body and the second box body, the efficient and stable internal heat dissipation of the device during use can be ensured. Moreover, with the cooperation of the first box body and the second box body closing under the control of the lifting mechanism, and the covering and locking of the box cover, the device can be folded into a fully enclosed box structure during transportation and carrying, taking into account the efficient protection during transportation and carrying and the efficient heat dissipation during use, and improving the flexible stability of the device during long-term use to a certain extent;

[0019] 2. In the present invention, by using the method of Velcro adhesion, the strip-shaped filter belt is changed into an annular belt structure. With the connection of the zipper, the filter belt installed between the first box body and the second box body can be flexibly disassembled and replaced, which is beneficial to improving the convenience for the staff to clean and replace the filter belt. At the same time, by setting the filter belt as a double-layer structure inside and outside, through the way of layer-by-layer filtering and blocking, the probability of foreign objects entering the interior from the outside when the device is started can be greatly reduced, and it is beneficial to ensure the smoothness of the air inlet during the internal heat dissipation of the device;

[0020] 3. In the present invention, by inserting the elastic rope through the middle position inside the filter belt and setting the original length of the elastic rope shorter than the length of the filter belt, when the first box body and the second box body approach and close to each other, with the elastic reset pulling of the elastic rope, the middle position of the filter belt can be drawn into the first box body and the second box body, which is beneficial to ensuring the stability of the filter belt being stored inside the connection position of the first box body and the second box body during the process of the first box body and the second box body closing again;

[0021] 4. In the present invention, by symmetrically arranging the first spray holes and the second spray holes front and back, and setting the air flow blown out from the first spray holes and the second spray holes to be flush with the upper surface of the control panel, during the heat dissipation process, the air flow blown out during heat dissipation can be used to blow on the upper surface of the control panel to perform air blowing cleaning on the upper surface of the control panel, avoiding the attachment of dust and debris on the upper surface of the control panel during use, and being beneficial to ensuring the cleanliness and stability of the surface of the control panel during the use of the device;

[0022] 5. In the present invention, by arranging the filter belt between the first boxes, the air inlet position is located below the first box and above the second box. In cooperation with arranging the opening of the first diversion pipe fitting above the interior of the first box and arranging the overhead plate below the interior of the second box, after the heat dissipation fan and the vortex fan are started, the external air flow can flow and cover comprehensively within the first box and the second box, which is beneficial to ensuring the comprehensiveness of the internal heat of the device being led out under the drive of the air flow during use. At the same time, by laying the elastic airbag filled with argon flat between the first box and the second box, the internal space of the first box and the second box can be divided into two relatively independent upper and lower regions. Under the partition setting, the heat dissipation in the upper and lower regions of the device is more targeted, and the classification and partition treatment are beneficial to optimizing the heat dissipation and temperature reduction of the device;

[0023] 6. In the present invention, by horizontally covering the elastic airbag filled with argon between the first box and the second box, when the first box and the second box are closed, the electronic components in the first box and the second box will squeeze the elastic airbag when they approach each other. After the elastic airbag deforms, it fills between the electronic components in the first box and the second box, supports and wraps the upper and lower electronic components, and forms a buffer protection, which is beneficial to further improving the protection safety during the carrying and transportation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 is a perspective view when the present invention is in use;

[0026] Figure 2 is of the present invention Figure 1 a left sectional view of the structure in;

[0027] Figure 3 is of the present invention Figure 1 a front sectional view of the structure in;

[0028] Figure 4 is of the present invention Figure 3 an enlarged view of part A in;

[0029] Figure 5 is a perspective view when the present invention is closed and stored;

[0030] Figure 6 is of the present invention Figure 5 a left sectional view of the structure in;

[0031] Figure 7 is of the present inventionFigure 5 Front elevation sectional view of the middle structure;

[0032] Figure 8 Stereogram of the filter belt of the present invention;

[0033] Figure 9 Stereogram of the first air box, the first spray hole, the first flow guiding pipe fitting and the heat dissipation fan of the present invention;

[0034] Figure 10 Stereogram of the second air box, the second spray hole, the second flow guiding pipe fitting and the scroll fan of the present invention;

[0035] Figure 11 Stereogram of the lifting mechanism and the linkage mechanism of the present invention.

[0036] Reference numerals in the figure:

[0037] 1. First box body; 101. Second box body; 102. Box cover; 103. Lock; 104. Control panel; 105. Detection unit;

[0038] 2. Filter belt; 201. Magic tape; 202. Zipper; 203. Elastic cord;

[0039] 3. First air box; 301. First spray hole; 302. First flow guiding pipe fitting; 303. Heat dissipation fan; 304. Second air box; 305. Second spray hole; 306. Second flow guiding pipe fitting; 3061. First vertical pipe; 3062. Second vertical pipe; 3063. Sleeve; 3064. Partition board; 3065. Spring; 307. Scroll fan; 308. Overhead board;

[0040] 4. First beam rod; 401. Second beam rod; 402. X-shaped hinge; 403. Slide groove; 404. Cylindrical rod; 405. Slide block; 406. Screw;

[0041] 5. Transmission rod; 501. First bevel gear; 502. Second bevel gear; 503. Spline shaft; 504. Third bevel gear; 505. Spline sleeve rod; 506. Crank;

[0042] 6. Elastic airbag. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0044] Embodiment: This embodiment provides a transformer short-circuit impedance test device. Refer to Figure 1 - Figure 11, specifically, it includes a first box body 1. A second box body 101 is arranged below the first box body 1. A box cover 102 covering the upper part thereof is rotatably connected to the rear of the top of the first box body 1. A lock catch 103 which cooperates with each other is arranged on the front surfaces of the first box body 1 and the box cover 102. A control panel 104 is fixedly embedded in the top of the first box body 1. A detection unit 105 is fixedly installed in the second box body 101. A filter belt 2 is connected around between the first box body 1 and the second box body 101, and the filter belt 2 is made of a flexible material. A first air box 3 arranged horizontally is fixedly installed at the rear of the top of the first box body 1, and a first spray hole 301 is opened on the first air box 3. A first diversion pipe fitting 302 extending into the first box body 1 is fixedly communicated with the bottom of the first air box 3, and a heat dissipation fan 303 is fixedly installed at the opening position of the first diversion pipe fitting 302. A second air box 304 arranged horizontally is fixedly installed at the front of the top of the first box body 1, and a second spray hole 305 is opened on the second air box 304. A second diversion pipe fitting 306 extending into the second box body 101 is fixedly communicated with the bottom of the second air box 304, and a scroll fan 307 in the second box body 101 is communicated with the second diversion pipe fitting 306. Two symmetrically arranged lifting mechanisms are arranged between the first box body 1 and the second box body 101, and a linkage mechanism extending to the top of the first box body 1 is connected between the left and right lifting mechanisms.

[0045] The control panel 104 is integrated with an external port, a display screen, control buttons, a power switch, a power input terminal and a printer. The detection unit 105 is electrically connected to the control panel 104. When the device is in use, the staff releases the locking of the lock catch 103 on the first box body 1 and the box cover 102, and can flip the box cover 102 backward to open it, so that the control panel 104 embedded in the top of the first box body 1 is exposed outside, and adjusts the lifting mechanism through the linkage mechanism to drive the first box body 1 and the second box body 101 to move away from each other, and the filter belt 2 connected between the first box body 1 and the second box body 101 is unfolded. The staff plugs the power cord into the power input terminal on the control panel 104 to provide power supply for this device. The staff connects the external port on the control panel 104 to the winding in the transformer to be tested through a wire. After starting the device, with the help of the detection unit 105, the current, voltage and power connected to the winding in the transformer to be tested can be tested. The test results are displayed on the display screen of the control panel 104, which is convenient for the staff to intuitively understand the test results. The test results can also be printed out through the printer on the control panel 104, which is convenient for the staff to retain relevant data.

[0046] During the use of the device, a large amount of heat is generated by the various electronic components in the first box body 1 and the second box body 101 due to energized operation. These heats accumulate in the first box body 1 and the second box body 101. If not quickly dissipated, it will interfere with the operating stability of each electronic component inside the device. When the device is in use, due to the separation of the first box body 1 and the second box body 101, the filter belt 2 unfolds, and the space for air flow inside the first box body 1 and the second box body 101 is greatly increased, which can improve the efficiency of heat dissipation from the inside of the device to a certain extent. Moreover, when dissipating heat during the startup process, after the cooling fan 303 installed at the opening of the first diversion pipe fitting 302 is energized and started, the air flow in the first box body 1 can be transported into the first diversion pipe fitting 302, so that the air flow enters the first air box 3 along the first diversion pipe fitting 302 and finally sprays outwards through the first spray holes 301. Under the above air flow route, the outside air enters the first box body 1 through the filter belt 2 arranged below the first box body 1, and through the connection of the first diversion pipe fitting 302 and the first air box 3, it sprays outwards from the first spray holes 301, quickly taking out the heat generated by the operation of each electronic component in the first box body 1, further ensuring the heat dissipation stability in the first box body 1. After the vortex fan 307 mounted on the second diversion pipe fitting 306 is energized and started, the air flow in the second box body 101 can be transported into the second diversion pipe fitting 306, so that the air flow enters the second air box 304 along the second diversion pipe fitting 306 and finally sprays outwards through the second spray holes 305. Under the above air flow route, the outside air enters the second box body 101 through the filter belt 2 arranged above the second box body 101, and through the connection of the second diversion pipe fitting 306 and the second air box 304, it sprays outwards from the second spray holes 305, quickly taking out the heat generated by the operation of each electronic component in the second box body 101. The air flow on the two routes can effectively ensure the efficient and stable heat dissipation inside the device.

[0047] After the device is used, the staff can bring the first box body 1 and the second box body 101 closer together through the cooperation of the linkage mechanism and the lifting mechanism, so that the bottom of the first box body 1 and the top of the second box body 101 are restored to the closed state again. The filter belt 2 arranged between the first box body 1 and the second box body 101 is then stored inside the first box body 1 and the second box body 101. After the box cover 102 is flipped and covers the top of the first box body 1, it is locked again through the lock 103, so that the device is restored to a closed box structure without holes and gaps on the outside, which can effectively improve the protection performance of the device during carrying and handling, greatly reduce the probability of rain and dust invading the inside when the device is not in use, and is beneficial to improving its use safety. When in use, by driving the first box body 1 and the second box body 101 to move away from each other, the filter belt 2 is unfolded, which can not only provide a large-range heat dissipation and air intake surface for the device, but also expand the internal space of the device. Cooperating with the upper and lower two air exhaust routes, it can greatly improve the efficiency and effect of the internal heat accumulation of the device dissipating to the outside, avoid the internal heat accumulation of the device affecting the stable operation of electronic components during use, and is beneficial to ensuring the accuracy of the device for testing the short-circuit impedance of the transformer.

[0048] In the specific implementation process, as Figure 8 shown, the filter belt 2 presents a strip-shaped structure. Hook-and-loop fasteners 201 that match each other are arranged at both ends of the filter belt 2. After the two ends of the filter belt 2 are adhered through the hook-and-loop fasteners 201, a loop-shaped structure is formed. Zipper 202 is connected between the upper and lower sides of the filter belt 2 and the first box body 1 and the second box body 101. When the device is in use, the filter belt 2 is set as a strip-shaped structure, and the filter belt 2 is formed into a loop-shaped structure that matches the outer wall circumference of the first box body 1 and the second box body 101 by means of adhesion with the hook-and-loop fasteners 201. Cooperating with the zipper 202 to connect the filter belt 2 between the first box body 1 and the second box body 101, the filter belt 2 installed between the first box body 1 and the second box body 101 can be flexibly disassembled and replaced. By disassembling, foreign objects blocked on the filter belt 2 can be cleaned, and the damaged and old filter belt 2 can be replaced, which can improve the convenience of daily maintenance during the use of the device to a certain extent. Desiccants are also installed in the first box body 1 and the second box body 101, which can ensure the dry stability inside the device. By disassembling the filter belt 2, the desiccants can be conveniently replaced.

[0049] In the specific implementation process, as Figure 1 、 Figure 4 and Figure 5As shown in the figure, the filter belt 2 is arranged in a double-layer structure inside and outside. The aperture of the filter holes on the inner layer of the filter belt 2 is set to 1 / 2 of the aperture of the filter holes on its outer layer. An elastic cord 203 is fixedly installed at the middle position of the double-layer structure inside and outside the filter belt 2, and the original length of the elastic cord 203 is set to 4 / 5 of the length of the filter belt 2. When the device is in use, since the filter belt 2 is arranged in a double-layer structure inside and outside, and the filtering effect of the filter holes on the double-layer structure is gradually enhanced, through the way of layer-by-layer filtering and blocking, not only can the probability of foreign objects entering the inside of the device from the outside be greatly reduced, but also the air intake volume during the heat dissipation of the device can be effectively guaranteed. By inserting the elastic cord 203 at the middle position inside the filter belt 2 and setting the original length of the elastic cord 203 to be shorter than the length of the filter belt 2, when the first box body 1 and the second box body 101 approach and close to each other, due to the loss of pulling on the upper and lower sides of the filter belt 2, driven by the elastic reset of the elastic cord 203, the middle position of the filter belt 2 can be retracted into the first box body 1 and the second box body 101, which is beneficial to ensuring the stability of the filter belt 2 being received inside the connection position of the first box body 1 and the second box body 101 during the process of the first box body 1 and the second box body 101 closing again.

[0050] In the specific implementation process, as Figure 2 shown, the first spray hole 301 is opened on the front surface of the first air box 3 and is flush with the upper surface of the control panel 104. The second spray hole 305 is opened on the back surface of the second air box 304 and is flush with the upper surface of the control panel 104. The first spray hole 301 and the second spray hole 305 are symmetrically arranged front and back. When the device is in use, the air flow discharged due to heat dissipation in the first box body 1 is blown out through the first spray hole 301, and the air flow discharged due to heat dissipation in the second box body 101 is blown out through the second spray hole 305. Since the first spray hole 301 and the second spray hole 305 are symmetrically arranged front and back, and the air flow blown out from the first spray hole 301 and the second spray hole 305 is flush with the upper surface of the control panel 104, during the process of the device being turned on and used, the air flow ejected due to heat dissipation can be used to blow on the upper surface of the control panel 104. Under the continuous impact of the air flow, not only can the upper surface of the control panel 104 be blown and cleaned, but also dust and debris can be prevented from adhering to the upper surface of the control panel 104 during use, which is beneficial to ensuring the cleanliness and stability of the surface of the control panel 104 during the use of the device. Dust-proof nets are installed in both the first spray hole 301 and the second spray hole 305.

[0051] In the specific implementation process, as Figure 2 、 Figure 9 and Figure 10As shown, the opening of the first flow guiding pipe fitting 302 is arranged at the upper position inside the first box body 1. An overhead plate 308 is fixedly installed inside the second box body 101 and is arranged below the detection unit 105. The top of the overhead plate 308 is provided with uniformly distributed through holes. The second flow guiding pipe fitting 306 communicates with the space below the overhead plate 308. The vortex fan 307 is arranged above the overhead plate 308 in an overhead manner. During the use of the device, when heat dissipation is carried out, since the filter belt 2 serving as the air inlet position is arranged below the first box body 1, and the opening of the first flow guiding pipe fitting 302 is arranged at the upper part inside the first box body 1, after the heat dissipation fan 303 is powered on and starts, the outside air flow can enter from below the first box body 1 and be discharged outward from above the first box body 1, so that the air flow can flow upward from bottom to top in the first box body 1 to cover the entire inside of the first box body 1 in all directions, ensuring the stable and comprehensive heat dissipation of the heat inside the first box body 1. Since the filter belt 2 serving as the air inlet position is arranged above the second box body 101, and the overhead plate 308 communicated with the second flow guiding pipe fitting 306 is arranged below the inside of the second box body 101, after the vortex fan 307 is powered on and starts, the outside air flow can enter from above the second box body 101 and be discharged outward from the overhead plate 308 below the second box body 101. Cooperating with the uniformly arranged through holes on the overhead plate 308, the air flow can flow downward from top to bottom in the second box body 101 to cover the entire inside of the second box body 101 in all directions, ensuring the stable and comprehensive heat dissipation of the heat inside the second box body 101. The above structures cooperate with each other, which can effectively ensure the comprehensive and efficient heat dissipation inside the device during its use.

[0052] In the specific implementation process, such as Figure 10As shown, the second air guiding pipe fitting 306 includes a first vertical pipe 3061 vertically arranged in the first box body 1 and a second vertical pipe 3062 vertically arranged in the second box body 101. The upper end of the first vertical pipe 3061 is fixedly communicated with the second air box 304, and the lower end of the second vertical pipe 3062 is fixedly communicated with the space below the overhead plate 308. A sleeve 3063 is slidably sleeved between the first vertical pipe 3061 and the second vertical pipe 3062. A horizontally arranged partition plate 3064 is fixedly installed at the middle position of the front surface of the sleeve 3063. Symmetrically arranged springs 3065 are fixedly installed on both the upper and lower sides of the partition plate 3064. The spring 3065 located above is fixedly connected to the bottom edge position of the first box body 1, and the spring 3065 located below is fixedly connected to the top edge position of the second box body 101. When the device is in use, since the first vertical pipe 3061, the second vertical pipe 3062 and the intermediate sleeve 3063 are slidably connected, the second air guiding pipe fitting 306 as a whole presents a telescopic adjustable structure. When the first box body 1 and the second box body 101 move away from each other and separate, the total length of the airflow guided by the second air guiding pipe fitting 306 is extended. When the first box body 1 and the second box body 101 move closer to each other and close, the total length of the second air guiding pipe fitting 306 will retract. By means of the relative sliding of the first vertical pipe 3061, the second vertical pipe 3062 and the sleeve 3063 in the second air guiding pipe fitting 306, the smooth stability of the airflow discharged outward from the second box body 101 is ensured, and the relative movement of the first box body 1 and the second box body 101 can be avoided from interfering with the airflow guidance. By fixedly installing symmetrically arranged springs 3065 on both the upper and lower sides of the partition plate 3064 at the middle position of the sleeve 3063, with the elastic support of the springs 3065, the sleeve 3063 can be stably maintained at the middle position between the first box body 1 and the second box body 101, which is beneficial to ensuring the stability during the relative sliding adjustment of the first vertical pipe 3061, the second vertical pipe 3062 and the sleeve 3063 in the second air guiding pipe fitting 306.

[0053] In the specific implementation process, such as Figure 1 and Figure 11As shown in the figure, the lifting mechanism includes a first beam rod 4 longitudinally fixed at the bottom edge position of the first box body 1, and a second beam rod 401 longitudinally fixed at the top edge of the second box body 101. An X-shaped hinge frame 402 is connected between the first beam rod 4 and the second beam rod 401. The upper and lower ends behind the X-shaped hinge frame 402 are respectively rotatably connected to the first beam rod 4 and the second beam rod 401. Chutes 403 are provided at the front positions inside the first beam rod 4 and the second beam rod 401. Cylindrical rods 404 are respectively fixed at the upper and lower ends in front of the X-shaped hinge frame 402 and are slidably inserted into the corresponding chutes 403. A slider 405 rotatably connected to the lower cylindrical rod 404 is slidably mounted on the second beam rod 401. A longitudinally arranged screw rod 406 is rotatably mounted on the second beam rod 401, and the screw rod 406 is threadedly engaged with the slider 405. The linkage mechanism includes a transmission rod 5 horizontally and rotatably mounted in the second box body 101. First bevel gears 501 are respectively fixed at the front ends of the left and right screw rods 406. Second bevel gears 502 meshing with the corresponding first bevel gears 501 are respectively fixed at both ends of the transmission rod 5. A spline shaft 503 vertically arranged is rotatably mounted in the second box body 101, and a third bevel gear 504 meshing with one of the second bevel gears 502 is fixedly mounted at the lower end of the spline shaft 503. A spline sleeve rod 505 vertically arranged is rotatably mounted in the first box body 1, and the spline sleeve rod 505 is movably sleeved outside the upper end of the spline shaft 503. The internal dimension of the spline sleeve rod 505 is adapted to the external dimension of the spline shaft 503. The top end of the spline sleeve rod 505 extends to the top of the first box body 1. A crank 506 adapted to be connected to the top end of the spline sleeve rod 505 is stored in the box cover 102.

[0054] When the device is in use, during the process of controlling the telescopic movement of the lifting mechanism through the linkage mechanism, the staff can remove the crank 506 stored in the box cover 102 and insert the crank 506 into the upper end of the spline sleeve rod 505. At this time, the lower end of the crank 506 is spline-connected to the upper end of the spline sleeve rod 505. When the staff holds the crank 506 and rotates it, the spline sleeve rod 505 can be driven to rotate synchronously, driving the spline shaft 503 inserted at the lower end of the spline sleeve rod 505 to rotate synchronously. Furthermore, the third bevel gear 504 fixed to the lower end of the spline shaft 503 is driven to rotate. By means of the meshing of the third bevel gear 504 and the second bevel gear 502, the second bevel gear 502 is driven to drive the transmission rod 5 to rotate. By means of the meshing of the second bevel gear 502 at the left and right ends and the first bevel gear 501, the left and right two screw rods 406 are driven to rotate synchronously, providing rotational power for the telescopic movement of the left and right two first beam rods 4. When the screw rod 406 is driven to rotate, by means of the threaded connection between the screw rod 406 and the slider 405, the slider 405 can move back and forth along the screw rod 406. By controlling the rotation direction of the screw rod 406, the control of the forward and backward movement direction of the screw rod 406 is realized. When the screw rod 406 moves backward, under the connection of the cylindrical rod 404 at the front lower end of the X-shaped hinge frame 402, the front lower end of the X-shaped hinge frame 402 can be driven to move backward, making the front and rear ends of the X-shaped hinge frame 402 approach each other. Through the cross deflection within the X-shaped hinge frame 402, the distance between the upper and lower ends of the X-shaped hinge frame 402 is gradually increased, and the first box body 1 and the second box body 101 connected to the upper and lower sides of the first beam rod 4 are gradually expanded, realizing the deployment and use of the device. When the screw rod 406 moves forward, the front and rear ends of the X-shaped hinge frame 402 will move away from each other, gradually reducing the distance between the upper and lower ends of the X-shaped hinge frame 402, and the first box body 1 and the second box body 101 connected to the upper and lower sides of the first beam rod 4 are gradually closed. During the use process of the device, through the linkage of the transmission rod 5, the left and right two first beam rods 4 can be controlled synchronously, which is beneficial to ensuring the stability of the device during contraction and deployment.

[0055] In the specific implementation process, such as Figure 3 and Figure 7As shown in the figure, an elastic airbag 6 is horizontally arranged between the first box body 1 and the second box body 101. The four corners of the elastic airbag 6 are fixedly connected to the four corners of the bottom of the first box body 1 and the four corners of the top of the second box body 101 respectively by pull ropes. The elastic airbag 6 is filled with argon. When the device is in use, since the elastic airbag 6 filled with argon is horizontally arranged between the first box body 1 and the second box body 101, when the first box body 1 and the second box body 101 are closed, due to the mutual approach of the electronic components in the first box body 1 and the electronic components in the second box body 101, the elastic airbag 6 arranged in the middle position will be squeezed. By virtue of the elastic deformation characteristics of the elastic airbag 6, the elastic airbag 6 deforms and fills the space between the electronic components in the first box body 1 and the second box body 101. With the wrapping formed by the filling and support of the elastic airbag 6, the electronic components in the first box body 1 and the second box body 101 are mutually supported. The elastic airbag 6 can support and buffer and protect the associated electronic components in the first box body 1 and the second box body 101, which is beneficial to avoiding the shaking and damage of the internal electronic components caused by impact and vibration during the transportation and carrying of the device, and improving the protection safety of the device during carrying and use to a certain extent.

[0056] When the device is unfolded and used, since the four corners of the elastic airbag 6 are connected to the four corners of the bottom of the first box body 1 and the four corners of the top of the second box body 101 by pull ropes, the elastic airbag 6 is in the middle position between the first box body 1 and the second box body 101 after unfolding, and the internal space of the first box body 1 and the second box body 101 can be divided into two relatively independent upper and lower regions. The heat generated by the electronic components installed in the first box body 1 during operation is relatively small, and the heat generated by the electronic components installed in the second box body 101 during operation is relatively large. With the barrier of the argon filled in the elastic airbag 6, the probability of heat exchange and flow between the first box body 1 and the second box body 101 can be greatly reduced, so that the air flow heat dissipation in the first box body 1 and the second box body 101 is independent of each other. A relatively small power dissipation fan 303 is used in the first box body 1 to convey the air flow, and a relatively large power vortex fan 307 is used in the second box body 101 to convey the air flow. Under the partition setting, the heat dissipation in the device is more targeted, and classified and partitioned treatment is beneficial to optimizing the heat dissipation and cooling of the device.

[0057] Specifically, the working principle and operation method of the present invention are as follows:

[0058] During daily transportation and carrying, the first box body 1, the box cover 102 and the box cover 102 are closed, so that the device forms a closed box structure, which can effectively improve the external protection performance of the device. In this state, after the elastic airbag 6 arranged between the electronic components in the first box body 1 and the second box body 101 is squeezed, it wraps and supports the electronic components on the upper and lower sides, and buffers and protects the electronic components in the first box body 1 and the second box body 101;

[0059] When the device is in use, unlock the locking of the first box body 1 and the box cover 102 by the lock catch 103, turn the box cover 102 backward to open it, so that the control panel 104 embedded in the top of the first box body 1 is exposed, and drive the lifting mechanism to extend through the linkage mechanism, so that the first box body 1 and the second box body 101 move away from each other, and the filter belt 2 between the first box body 1 and the second box body 101 is stretched. Then, the staff connects the winding of the transformer to be tested to the device, and tests the winding of the transformer to be tested through the device. During the test, the cooling fan 303 and the vortex fan 307 are powered on and started. The outside air flow enters the first box body 1 from below the filter belt 2 and is ejected outward through the first spray hole 301 under the guidance of the first flow guiding pipe fitting 302 and the first air box 3. Another air flow enters the second box body 101 from above the filter belt 2 and is ejected outward through the second spray hole 305 under the guidance of the overhead plate 308, the second flow guiding pipe fitting 306 and the second air box 304. Under the air flow, the internal heat dissipation of the device is ensured to be stable. Through the barrier of the elastic airbag 6 and the argon gas inside it, the inner area of the device is divided into two relatively independent heat dissipation spaces, which do not interfere with each other, facilitating the realization of optimal heat dissipation and temperature reduction. The air flow ejected from the first spray hole 301 and the second spray hole 305 blows on the surface of the control panel 104 to automatically clean the surface of the control panel 104.

[0060] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A transformer short-circuit impedance testing device, comprising a first box (1), characterized in that: A second box body (101) is arranged below the first box body (1); a box cover (102) covering the top of the first box body (1) is rotatably connected to the rear of the top of the first box body (1); the front of the first box body (1) and the box cover (102) are provided with lock buckles (103) that cooperate with each other; a control panel (104) is fixedly embedded on the top of the first box body (1); a detection unit (105) is fixedly installed in the second box body (101); a filter belt (2) is connected around the first box body (1) and the second box body (101), and the filter belt (2) is made of flexible material; a first gas box (3) arranged horizontally is fixedly installed at the rear of the top of the first box body (1), and the first gas box (3) is provided with a first spray hole (301); the bottom of the first gas box (3) is fixedly connected to the filter belt (2) between the first box body (1) and the second box body (101); A first air guide pipe (302) is provided which extends into the first housing (1), and a cooling fan (303) is fixedly installed at the opening position of the first air guide pipe (302); a second air box (304) which is arranged horizontally is fixedly installed in front of the top of the first housing (1), and a second spray hole (305) is provided on the second air box (304); a second air guide pipe (306) which extends into the second housing (101) is fixedly connected to the bottom of the second air box (304), and the second air guide pipe (306) is connected to a turbofan (307) in the second housing (101); two left-right symmetrical lifting mechanisms are provided between the first housing (1) and the second housing (101), and a linkage mechanism which extends to the top of the first housing (1) is connected between the left and right lifting mechanisms.

2. A transformer short-circuit impedance testing device according to claim 1, characterized in that: The filter belt (2) is in the form of a strip-shaped structure, and mutually adaptable Velcro strips (201) are provided at both ends of the filter belt (2). The two ends of the filter belt (2) are adhered together by the Velcro strips (201) to form an endless belt-shaped structure, and zippers (202) are provided between the upper and lower sides of the filter belt (2) and the first box body (101) and the second box body (101).

3. A transformer short-circuit impedance testing device according to claim 1, characterized in that: The filter belt (2) is configured as an inner and outer double-layer structure, and the filter hole diameter on the inner layer of the filter belt (2) is configured as 1 / 2 of the filter hole diameter on the outer layer thereof.

4. A transformer short-circuit impedance testing device according to claim 3, characterized in that: An elastic rope (203) is fixedly installed in the middle position of the inner and outer double-layer structures of the filter belt (2), and the original length of the elastic rope (203) is set to 4 / 5 of the length of the filter belt (2).

5. A transformer short-circuit impedance testing device according to claim 1, characterized in that: The first spray hole (301) is provided on the front side of the first gas box (3) and is flush with the upper surface of the control panel (104); the second spray hole (305) is provided on the back side of the second gas box (304) and is flush with the upper surface of the control panel (104); the first spray hole (301) and the second spray hole (305) are symmetrically arranged front to back.

6. A transformer short-circuit impedance testing device according to claim 1, characterized in that: The opening of the first flow guide pipe (302) is arranged at an upper position inside the first box body (1); an overhead plate (308) arranged below the detection unit (105) is fixedly installed inside the second box body (101), and the top of the overhead plate (308) is provided with evenly distributed through holes; the second flow guide pipe (306) is connected to the space below the overhead plate (308), and the turbofan (307) is overhead above the overhead plate (308).

7. A transformer short-circuit impedance testing device according to claim 6, characterized in that: The second flow-guiding pipe member (306) comprises a first vertical pipe (3061) vertically arranged in the first box (1), and a second vertical pipe (3062) vertically arranged in the second box (101); the upper end of the first vertical pipe (3061) is fixedly connected to the second air box (304); the lower end of the second vertical pipe (3062) is fixedly connected to the space below the overhead plate (308); a sleeve (3063) is slidably sleeved between the first vertical pipe (3061) and the second vertical pipe (3062); a horizontally arranged partition (3064) is fixedly installed in the middle position of the front side of the sleeve (3063); vertically arranged springs (3065) are fixedly installed on both the upper and lower sides of the partition (3064); the spring (3065) located at the upper side is fixedly connected to the bottom edge of the first box (1); and the spring (3065) located at the lower side is fixedly connected to the top edge of the second box (101).

8. A transformer short-circuit impedance testing device according to claim 1, characterized in that: The lifting mechanism comprises a first beam (4) longitudinally fixed at the bottom edge of the first box body (1), and a second beam (401) longitudinally fixed at the top edge of the second box body (101), an X-shaped hinge frame (402) is connected between the first beam (4) and the second beam (401), and the upper and lower ends of the rear of the X-shaped hinge frame (402) are rotatably connected to the first beam (4) and the second beam (401), respectively, and the first beam (4) and the second beam (401) are connected to each other. 01) A slide groove (403) is provided at the front position inside, and cylindrical rods (404) slidably inserted into the corresponding slide grooves (403) are fixed to the upper and lower ends of the front of the X-shaped hinged frame (402), and a slider (405) rotatably connected to the lower cylindrical rod (404) is slidably installed on the second beam rod (401), and a longitudinally arranged screw rod (406) is rotatably installed on the second beam rod (401), and the screw rod (406) and the slider (405) are threadedly screwed.

9. A transformer short-circuit impedance testing device according to claim 8, characterized in that: The linkage mechanism comprises a transmission rod (5) which is rotatably mounted in a second housing (101), the front ends of the two left and right screw rods (406) are both fixed with first bevel teeth (501), both ends of the transmission rod (5) are both fixed with second bevel teeth (502) which mesh with the corresponding first bevel teeth (501), a vertically arranged spline shaft (503) is rotatably mounted in the second housing (101), and a spline shaft (503) which meshes with one of the second bevel teeth (502) is fixedly mounted at the lower end of the spline shaft (503). The first housing (1) is provided with a vertically arranged spline sleeve rod (505) rotatably mounted therein, and the spline sleeve rod (505) is movably sleeved on the outer side of the upper end of the spline shaft (503), the inner dimensions of the spline sleeve rod (505) are adapted to the outer dimensions of the spline shaft (503), the top end of the spline sleeve rod (505) extends to the top of the first housing (1), and the housing cover (102) contains a crank handle (506) adapted to be connected to the top end of the spline sleeve rod (505).

10. A transformer short-circuit impedance testing device according to claim 1, characterized in that: A horizontally covering elastic airbag (6) is provided between the first box body (1) and the second box body (101), and the four corners of the elastic airbag (6) are fixedly connected to the four bottom corners of the first box body (1) and the four top corners of the second box body (101) respectively through drawstrings, and the elastic airbag (6) is filled with argon gas.

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