Transformer short-circuit impedance testing device

Abstract

The invention discloses a transformer short-circuit impedance testing device, and relates to the technical field of impedance testing instruments.The transformer short-circuit impedance testing device is characterized in that a lifting mechanism is connected between a first box body and a second box body, a filter belt is connected between the first box body and the second box body, and under the control of the lifting mechanism, the filter belt is connected with the first box body; the first box body and the second box body can be separated from each other to be opened, and in cooperation with filtering isolation after the filter belt is unfolded and driving of cooling fans and turbofans in the first box body and the second box body to airflow, it can be guaranteed that internal heat dissipation is efficient and stable when the device is unfolded for use; the first box body and the second box body are closed under the control of the lifting mechanism, and the box cover is used for covering and locking, so that the device can be folded into a totally-closed box body structure during transportation and carrying, and efficient protection during transportation and carrying and efficient heat dissipation during use are both considered; and the flexibility and the stability of the device in the long-time use process are improved to a certain extent.

Description

Technical Field

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

[0002] The transformer short-circuit impedance test device is an instrument used to detect transformer windings. When the transformer is impacted by short-circuit current, or the transformer is impacted by mechanical force during transportation and installation, the transformer short-circuit impedance test device is used to test the winding current, voltage and power and collect data. It can check whether the transformer winding is deformed. Therefore, using the transformer short-circuit impedance test device for detection is of great significance for determining whether the transformer can be put into operation, and it is also one of the bases for determining whether the transformer needs to be disassembled for inspection.

[0003] The transformer short-circuit impedance test device in the prior art is usually configured as a portable box structure. In order to ensure that the test device can have a long service life and prevent foreign objects and rain from intruding into the device during transportation and causing damage to electronic components, the entire box of the test device is usually configured as a completely closed structure. Although this structural feature can effectively improve the external protection performance of the device, it will greatly reduce the efficiency of dissipating internal heat during the use of the test device, which is likely to interfere with the stability of the transformer short-circuit impedance test device during actual use.

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

[0005] The purpose of the present invention is to solve the problem that the transformer short-circuit impedance test device in the prior art is set as a closed box structure, which makes it difficult for safety protection during transportation and carrying and internal efficient heat dissipation during use to coexist, affecting the stability of the device during actual use, and proposes a transformer short-circuit impedance test 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 test device comprises a first box body, a second box body is arranged below the first box body, a box cover covering the top of the first box body is rotatably connected to the rear of the top, the front of the first box body and the box cover are provided with mutually matching lock buckles, 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 the first box body and the second box body, and the filter belt is made of flexible material, a first gas box arranged horizontally is fixedly installed on the rear of the top of the first box body, and a first spray hole is opened on the first gas box, and the first gas box has a first spray hole. The bottom is fixedly connected with a first air guide pipe extending into the first box body, and a cooling fan is fixedly installed at the opening position of the first air guide pipe, a transversely arranged second air box is fixedly installed in the front of the top of the first box body, and a second spray hole is opened on the second air box, the bottom of the second air box is fixedly connected with a second air guide pipe extending into the second box body, and the second air guide pipe is connected with a turbofan in the second box body, and two left-right symmetrical 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 is in a strip-shaped structure, and Velcro that adapts to each other is provided at both ends of the filter belt. The two ends of the filter belt are adhered by the Velcro to form a ring-shaped structure, and zippers are connected between the upper and lower sides of the filter belt and the first box and the second box.

[0009] Preferably, the filter belt is configured as an inner and outer double-layer structure, and the filter hole diameter on the inner layer of the filter belt is configured as 1 / 2 of the filter hole diameter on the outer layer thereof.

[0010] Preferably, an elastic rope is fixedly installed in 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 gas box and is flush with the upper surface of the control panel, the second spray hole is opened on the back of the second gas box and is flush with the upper surface of the control panel, and the first spray hole and the second spray hole are symmetrically arranged front to back.

[0012] Preferably, the opening of the first flow guide duct is arranged at an upper position inside the first box body, and an overhead plate arranged below the detection unit is fixedly installed inside the second box body, and evenly distributed through holes are opened on the top of the overhead plate, the second flow guide duct is connected to the space below the overhead plate, and the turbofan is overheadly arranged above the overhead plate.

[0013] Preferably, the second flow-guiding pipe member 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 connected to the second air box, the lower end of the second vertical pipe is fixedly connected to 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 is fixedly installed in the middle position of the front side of the sleeve, and vertically arranged springs are fixedly installed on the upper and lower sides of the partition, the spring located at the top is fixedly connected to the bottom edge position of the first box body, and the spring located at the bottom 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 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 of the rear of the X-shaped articulated frame are respectively rotatably connected to the first beam rod and the second beam rod, sliding grooves are provided at the front positions inside the first beam rod and the second beam rod, and the upper and lower ends of the front of the X-shaped articulated frame are respectively fixed with cylindrical rods slidably inserted in the corresponding sliding grooves, 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 threadably screwed to the slider rod.

[0015] Preferably, the linkage mechanism includes a transmission rod which is rotatably installed in the second housing, the front ends of the left and right screw rods are fixed with first bevel teeth, both ends of the transmission rod are fixed with second bevel teeth which mesh with the corresponding first bevel teeth, a vertically arranged spline shaft is rotatably installed in the second housing, and a third bevel tooth which meshes with one of the second bevel teeth is fixedly installed on the lower end of the spline shaft, a vertically arranged spline sleeve rod is rotatably installed in the first housing, and the spline sleeve rod is movably sleeved on the outer side of the upper end of the spline shaft, the internal dimensions of the spline sleeve rod are adapted to the external dimensions of the spline shaft, the top end of the spline sleeve rod extends to the top of the first housing, and a crank handle which is adaptably connected to the top end of the spline sleeve rod is accommodated in the housing cover.

[0016] Preferably, a horizontally covering elastic airbag is provided between the first box body and the second box body, and the four corners of the elastic airbag are fixedly connected to the four bottom corners of the first box body and the four top corners of the second box body through drawstrings, and the elastic airbag is filled with argon gas.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, by connecting the lifting mechanism between the first box and the second box, and connecting the filter belt between the first box and the second box, under the control of the lifting mechanism, the first box and the second box can be opened away from each other, and the filtering isolation after the filter belt is unfolded, and the driving of the airflow by the cooling fan and the turbofan in the first box and the second box can ensure the efficient and stable internal heat dissipation of the device when it is unfolded and used, and the closing of the first box and the second box 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 when it is transported and carried, taking into account both the efficient protection during transportation and carrying and the efficient heat dissipation during use, and to a certain extent improving the flexibility and stability of the device during long-term use;

[0019] 2. In the present invention, the filter belt with a strip-shaped structure is changed into a ring-shaped structure by Velcro adhesion, and the filter belt installed between the first box and the second box can be flexibly replaced with a zipper, which is conducive to improving the convenience of cleaning and replacing the filter belt by the staff. At the same time, by setting the filter belt as an inner and outer double-layer structure, the probability of foreign matter entering the interior when the device is activated can be greatly reduced by filtering and blocking layer by layer, and it is conducive to ensuring the smoothness of air intake when the device is internally radiated;

[0020] 3. In the present invention, by inserting the elastic rope into the middle position of the filter belt and setting the original length of the elastic rope to be shorter than the length of the filter belt, when the first box and the second box are close to each other, the elastic return pull of the elastic rope can pull the middle position of the filter belt into the first box and the second box, which is conducive to ensuring the stability of the filter belt stored in the connection position of the first box and the second box during the re-closing process of the first box and the second box;

[0021] 4. In the present invention, by arranging the first spray hole and the second spray hole symmetrically in front and back, and arranging the airflow blown out of the first spray hole and the second spray hole to be flush with the upper surface of the control panel, during the heat dissipation process, the airflow sprayed out by the heat dissipation can be blown on the upper surface of the control panel to clean the upper surface of the control panel, thereby preventing dust and debris from adhering to the upper surface of the control panel during use, which is conducive to ensuring that the surface of the control panel is clean and stable during the use of the device;

[0022] 5. In the present invention, by arranging the filter belt between the first box bodies, the air inlet position is located below the first box body and above the second box body, and the opening of the first air guide pipe is arranged above the inside of the first box body, and the overhead plate is arranged below the inside of the second box body, so that after the cooling fan and the turbofan are started, the external airflow can flow and cover in all directions inside the first box body and the second box body, which is conducive to ensuring the comprehensiveness of the internal heat being guided outward by the airflow during the use of the device. At the same time, by laying the elastic airbag filled with argon gas between the first box body and the second box body, the internal space of the first box body and the second box body can be divided into two relatively independent upper and lower areas. Under the partition setting, the heat dissipation in the upper and lower areas of the device is more targeted, and the classified and partitioned processing is conducive to optimizing the heat dissipation and cooling in the device;

[0023] 6. In the present invention, an elastic airbag filled with argon gas is horizontally covered between the first box and the second box, so that when the first box and the second box are closed, the electronic components in the first box and the second box are close to each other and squeeze the elastic airbag, so that the elastic airbag is deformed and filled between the electronic components in the first box and the second box, supporting and wrapping the electronic components on the upper and lower sides, and forming a buffer protection, which is beneficial to further improve the protection safety of the device during carrying and transportation. 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 exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 This is a three-dimensional diagram of the present invention when it is opened and used;

[0026] Figure 2 For the present invention Figure 1 Left side cross-section of the middle structure;

[0027] Figure 3 For the present invention Figure 1 Front view of the structure in section;

[0028] Figure 4 For the present invention Figure 3 The enlarged view of point A in the middle;

[0029] Figure 5 It is a three-dimensional diagram of the present invention when it is closed and stored;

[0030] Figure 6 For the present invention Figure 5 Left side cross-section of the middle structure;

[0031] Figure 7 For the present invention Figure 5 Front view of the structure in section;

[0032] Figure 8 A three-dimensional diagram of the filter belt of the present invention;

[0033] Fig. 9 It is a three-dimensional diagram of the first air box, the first spray hole, the first flow guide pipe and the heat dissipation fan of the present invention;

[0034] Fig.10 It is a three-dimensional diagram of the second air box, the second spray hole, the second flow guide pipe and the turbofan of the present invention;

[0035] Fig.11 It is a three-dimensional diagram of the lifting mechanism and the linkage mechanism of the present invention.

[0036] Serial number in the picture:

[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. Velcro; 202. Zipper; 203. Elastic rope;

[0039] 3. First air box; 301. First spray hole; 302. First flow guide pipe; 303. Cooling fan; 304. Second air box; 305. Second spray hole; 306. Second flow guide pipe; 3061. First vertical pipe; 3062. Second vertical pipe; 3063. Casing; 3064. Partition; 3065. Spring; 307. Turbofan; 308. Overhead plate;

[0040] 4. first beam; 401. second beam; 402. X-shaped articulated frame; 403. slideway; 404. cylindrical rod; 405. slider; 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 handle;

[0042] 6. Elastic airbag. DETAILED DESCRIPTION

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

[0044] Embodiment: This embodiment provides a transformer short-circuit impedance test device, see Figure 1 - Fig.11Specifically, 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 top of the first box body 1 is rotatably connected to the rear, and the front of the first box body 1 and the box cover 102 are provided with mutually matching lock buckles 103, a control panel 104 is fixedly inlaid 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 a first spray hole 301 is opened on the first gas box 3, and the bottom of the first gas box 3 is fixedly connected to There is a first air guide duct 302 extending into the first box body 1, and a cooling fan 303 is fixedly installed at the opening position of the first air guide duct 302, a transversely arranged second air box 304 is fixedly installed in 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, the bottom of the second air box 304 is fixedly connected to a second air guide duct 306 extending into the second box body 101, and the second air guide duct 306 is connected to a turbofan 307 in the second box body 101, and two left-right symmetrical 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, a control button, 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 used, the staff releases the lock of the first box body 1 and the box cover 102 by the lock buckle 103, and can flip the box cover 102 backward to expose the control panel 104 embedded in the top of the first box body 1 to the outside, and adjusts the lifting mechanism through the linkage mechanism to drive the first box body 1 and the second box body 101 away from each other, and the filter belt 2 connected between the first box body 1 and the second box body 101 is unfolded, and the staff The operator plugs the power cord into the power input terminal on the control panel 104 to provide power supply for the device. The operator 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, the current, voltage and power connected to the winding in the transformer to be tested can be tested with the help of the detection unit 105. The test results are displayed on the display screen on the control panel 104, which makes it convenient for the operator to understand the test results intuitively and clearly. The test results can also be printed out by the printer on the control panel 104, which is convenient for the operator to retain relevant data.

[0046] During the use of the device, the various electronic components in the first box body 1 and the second box body 101 will generate a large amount of heat due to power-on operation. The heat accumulated in the first box body 1 and the second box body 101, if not quickly dissipated, will interfere with the operation stability of the various electronic components 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 is unfolded, 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 inside the device to a certain extent. In addition, when heat is dissipated during the startup process, the cooling fan 303 installed at the opening of the first guide pipe 302 can be powered on and started, so that the airflow in the first box body 1 can be transported to the first guide pipe 302, so that the airflow enters the first air box 3 along the first guide pipe 302, and finally sprays out through the first spray hole 301. Under the above airflow flow route, the outside air enters through the filter belt 2 arranged under the first box 1 The heat generated by the operation of each electronic component in the first box 1 is quickly taken out, and the heat dissipation stability in the first box 1 is further ensured. After the turbofan 307 mounted on the second air guide pipe 306 is powered on and started, the airflow in the second box 101 can be transported to the second air guide pipe 306, so that the airflow enters the second air box 304 along the second air guide pipe 306, and finally is ejected out through the second air hole 305. Under the above airflow flow route, the outside air enters the second box 101 through the filter belt 2 arranged above the second box 101, and is ejected out from the second air hole 305 through the connection between the second air guide pipe 306 and the second air box 304, so that the heat generated by the operation of each electronic component in the second box 101 is quickly taken out. The airflow 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 a closed state, and the filter belt 2 arranged between the first box body 1 and the second box body 101 is stored inside the first box body 1 and the second box body 101. After the box cover 102 is turned over to cover the top of the first box body 1, it is locked again by the lock buckle 103, so that the device is restored to a closed box structure with no holes or gaps on the outside, which can effectively improve the protection of the device when it is carried and transported. The performance of the device can greatly reduce the probability of rainwater and dust intruding into the interior when the device is not in use, which is beneficial to improving its safety in use. When in use, by driving the first box body 1 and the second box body 101 away from each other, the filter belt 2 is unfolded, which can not only provide a large range of heat dissipation and air intake surface for the device, but also expand the internal space of the device. In conjunction with the upper and lower air exhaust routes, the efficiency and effect of dissipating the internal heat of the device can be greatly improved, avoiding the internal heat accumulation of the device when the device is in use. The influence on the stable operation of electronic components is avoided, which is beneficial to ensuring the accuracy of the device in testing the short-circuit impedance of the transformer.

[0048] In the specific implementation process, Figure 8 As shown, the filter belt 2 is a strip-shaped structure, and the two ends of the filter belt 2 are provided with Velcro 201 that adapt to each other. The two ends of the filter belt 2 are adhered by the Velcro 201 to form an annular structure. The upper and lower sides of the filter belt 2 are connected to the first box body 1 and the second box body 101 with zippers 202. When the device is used, the filter belt 2 is set to a strip-shaped structure, and the Velcro 201 is used to adhere the filter belt 2 to form an annular structure that adapts to the circumference of the outer end wall of the first box body 1 and the second box body 101. The filter belt 2 is connected to the first box body 1 and the second box body 101 with the help of the zipper 202. 2 is connected between the first box body 1 and the second box body 101, so that 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 matter blocked outside by 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. Desiccant is also installed in the first box body 1 and the second box body 101 to ensure the dry stability inside the device. By disassembling the filter belt 2, the desiccant can be conveniently replaced.

[0049] In the specific implementation process, Figure 1 , Figure 4 and Figure 5As shown, the filter belt 2 is set as an inner and outer double-layer structure, the filter hole aperture on the inner layer of the filter belt 2 is set to 1 / 2 of the filter hole aperture on the outer layer, and an elastic rope 203 is fixedly installed in the middle position of the inner and outer double-layer structure 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. When the device is used, since the filter belt 2 is set as an inner and outer double-layer structure, and the filtering effect of the filter holes on the inner and outer double-layer structure is gradually enhanced, by filtering and blocking layer by layer, not only can the probability of foreign matter entering the interior of the device be greatly reduced, but also the heat dissipation of the device during operation can be effectively guaranteed. In order to increase the air intake volume, the elastic rope 203 is inserted into the middle position of the filter belt 2, and the original length of the elastic rope 203 is set to be shorter than the length of the filter belt 2. This allows the filter belt 2 to be retracted into the first box body 1 and the second box body 101 under the elastic reset of the elastic rope 203 when the first box body 1 and the second box body 101 are closed together. This is beneficial to ensuring the stability of the filter belt 2 stored inside the connection position between the first box body 1 and the second box body 101 during the re-closing process of the first box body 1 and the second box body 101.

[0050] In the specific implementation process, Figure 2 As shown, the first spray hole 301 is opened on the front 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 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 to back. When the device is used, the airflow derived from the heat dissipation in the first box 1 is blown out through the first spray hole 301, and the airflow derived from the heat dissipation in the second box 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 to back, and the first spray hole The airflow 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, so that when the device is turned on and used, the airflow ejected by the heat dissipation can be blown on the upper surface of the control panel 104. Under the continuous impact of the airflow, not only can the upper surface of the control panel 104 be cleaned by air blowing, 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 that the surface of the control panel 104 is clean and stable during the use of the device. Dustproof nets are installed in the first spray hole 301 and the second spray hole 305.

[0051] In the specific implementation process, Figure 2 , Fig. 9 and Fig.10As shown, the opening of the first air guide member 302 is arranged at the upper position inside the first box body 1, and the interior of the second box body 101 is fixedly installed with an overhead plate 308 arranged below the detection unit 105, and the top of the overhead plate 308 is provided with evenly distributed through holes, the second air guide member 306 is connected to the space below the overhead plate 308, and the turbofan 307 is overhead arranged above the overhead plate 308. During the use of the device, when heat is dissipated, since the filter belt 2 as the air inlet position is arranged below the first box body 1, and the opening of the first air guide member 302 is arranged above the inside of the first box body 1, after the cooling fan 303 is powered on and started, the external airflow can enter from the bottom of the first box body 1 and be discharged to the outside from the top of the first box body 1, so that the airflow can flow from bottom to top in all directions in the first box body 1. It covers the entire first box body 1, ensuring that the heat in the first box body 1 is brought out stably and comprehensively. Since the filter belt 2 serving as the air inlet position is arranged above the second box body 101, and the overhead plate 308 connected to the second guide pipe 306 is arranged at the lower part of the second box body 101, after the turbofan 307 is powered on and started, the external air flow can enter from the top of the second box body 101 and be discharged outward from the overhead plate 308 below the second box body 101. With the through holes evenly opened on the overhead plate 308, the air flow can flow from top to bottom in the second box body 101 in all directions, covering the entire second box body 101, ensuring that the heat in the second box body 101 is brought out stably and comprehensively. The above structures cooperate with each other to effectively ensure the comprehensive and efficient dissipation of internal heat outward during the use of the device.

[0052] In the specific implementation process, Fig.10As shown, the second flow guide pipe 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 connected to the second air box 304, and the lower end of the second vertical pipe 3062 is fixedly connected to the space below the overhead plate 308, and a sleeve 3063 is slidably sleeved between the first vertical pipe 3061 and the second vertical pipe 3062, and a horizontal sleeve 3063 is fixedly installed in the middle position of the front side of the sleeve 3063. The partition 3064 is provided, and the upper and lower sides of the partition 3064 are fixedly installed with vertically arranged springs 3065. The spring 3065 located at the top is fixedly connected to the bottom edge position of the first box body 1, and the spring 3065 located at the bottom is fixedly connected to the top edge position of the second box body 101. When the device is used, the first vertical pipe 3061, the second vertical pipe 3062 and the intermediate sleeve 3063 are slidably connected, so that the second guide pipe 306 is retractable and adjustable as a whole. The structure of the present invention is that when the first box body 1 and the second box body 101 are separated from each other, the total length of the second air guide pipe 306 for guiding the airflow is extended; when the first box body 1 and the second box body 101 are close to each other and closed, the total length of the second air guide pipe 306 is retracted; with the help of the relative sliding of the first vertical pipe 3061, the second vertical pipe 3062 and the sleeve 3063 in the second air guide pipe 306, the smooth and stable discharge of the airflow in the second box body 101 to the outside is guaranteed, and the relative movement of the first box body 1 and the second box body 101 can be prevented from interfering with the airflow guidance; symmetrically arranged springs 3065 are fixedly installed on both the upper and lower sides of the partition 3064 in the middle position of the sleeve 3063; with the help of the elastic support of the spring 3065, the sleeve 3063 can be stably maintained in the middle position of the first box body 1 and the second box body 101, which is conducive to ensuring the stability of the first vertical pipe 3061, the second vertical pipe 3062 and the sleeve 3063 in the second air guide pipe 306 during relative sliding adjustment.

[0053] In the specific implementation process, Figure 1 and Fig.11As shown, the lifting mechanism includes 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 respectively rotatably connected to the first beam 4 and the second beam 401, and the first beam 4 and the second beam 401 are both provided with sliding grooves 403 at the front positions inside, and the upper and lower ends of the front of the X-shaped hinge frame 402 are respectively fixed with cylindrical rods 404 slidably inserted in the corresponding sliding grooves 403, a slider 405 rotatably connected to the lower cylindrical rod 404 is slidably installed on the second beam 401, and a longitudinally arranged screw rod 406 is rotatably installed on the second beam 401, and the screw rod 406 is threadedly screwed with the slider 405, and the linkage mechanism It includes a transmission rod 5 which is rotatably installed in the second housing 101, the front ends of the left and right screw rods 406 are fixed with first bevel teeth 501, and the two ends of the transmission rod 5 are fixed with second bevel teeth 502 which mesh with the corresponding first bevel teeth 501, a vertically arranged spline shaft 503 is rotatably installed in the second housing 101, and the lower end of the spline shaft 503 is fixedly installed with a third bevel tooth 504 which meshes with one of the second bevel teeth 502, a vertically arranged spline sleeve rod 505 is rotatably installed in the first housing 1, and the spline sleeve rod 505 is movably sleeved on the outer side of the upper end of the spline shaft 503, the internal size of the spline sleeve rod 505 is adapted to the external size of the spline shaft 503, the top end of the spline sleeve rod 505 extends to the top of the first housing 1, and a crank 506 which is adaptably connected to the top end of the spline sleeve rod 505 is accommodated in the housing cover 102.

[0054] When the device is in use, during the process of controlling the extension and retraction of the lifting mechanism through the linkage mechanism, the staff can remove the crank handle 506 stored in the box cover 102, and plug the crank handle 506 into the upper end of the spline sleeve rod 505. At this time, the lower end of the crank handle 506 is spline-connected to the upper end of the spline sleeve rod 505. When the staff holds the crank handle 506 and rotates it, the spline sleeve rod 505 can be driven to rotate synchronously, which drives the spline shaft 503 plugged in the lower end of the spline sleeve rod 505 to rotate synchronously, and then drives the spline shaft 503 fixed at the lower end of the spline shaft 503. The third bevel gear 504 is rotated, and the meshing of the third bevel gear 504 and the second bevel gear 502 drives the second bevel gear 502 to drive the transmission rod 5 to rotate. The meshing of the second bevel gear 502 and the first bevel gear 501 at the left and right ends drives the left and right screw rods 406 to rotate synchronously, providing rotational power for the extension and contraction of the left and right first beam rods 4. When the screw rod 406 is driven to rotate, the screw rod 406 and the slider 405 can move forward and backward along the screw rod 406 by means of the threaded connection between the screw rod 406 and the slider 405. By controlling the rotation direction of the screw rod 406, the forward and backward movement direction of the screw rod 406 is controlled. When the screw rod 406 moves backward, the front lower end of the X-shaped articulated frame 402 can be driven to move backward under the connection of the cylindrical rod 404 at the front lower end of the X-shaped articulated frame 402, so that the front and rear ends of the X-shaped articulated frame 402 are close to each other. Through the cross deflection in the X-shaped articulated frame 402, the distance between the upper and lower ends of the X-shaped articulated 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 4 are gradually opened to realize the deployment and use of the device. When the screw rod 406 moves forward, the front and rear ends of the X-shaped articulated frame 402 are moved away from each other, and the distance between the upper and lower ends of the X-shaped articulated frame 402 is gradually reduced, and the first box body 1 and the second box body 101 connected to the upper and lower sides of the first beam 4 are gradually closed. During the use of the device, the two first beams 4 on the left and right can be synchronously controlled through the linkage of the transmission rod 5, which is conducive to ensuring the stability of the device during contraction and deployment.

[0055] In the specific implementation process, Figure 3 and Figure 7As shown, a horizontally covered elastic airbag 6 is arranged between the first box body 1 and the second box body 101, and the four corners of the elastic airbag 6 are respectively 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 through pull ropes, and the elastic airbag 6 is filled with argon gas. When the device is used, the elastic airbag 6 filled with argon gas is horizontally covered 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, the electronic components in the first box body 1 and the electronic components in the second box body 101 are close to each other, which will cause the elastic airbag 6 arranged in the middle position to be moved. The elastic airbag 6 is extruded, and with the help of the elastic deformation characteristics of the elastic airbag 6, the elastic airbag 6 is deformed and filled between the electronic components in the first box body 1 and the second box body 101. With the help of the wrapping formed by the filling 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 the associated electronic components in the first box body 1 and the second box body 101, which is beneficial to avoid the internal electronic components from shaking and being damaged due to impact and vibration during the transportation of the device, thereby improving the protection safety of the device when it is carried and used to a certain extent.

[0056] When the device is deployed for use, since the four corners of the elastic airbag 6 are connected to the four bottom corners of the first box body 1 and the four top corners of the second box body 101 through pull ropes, the elastic airbag 6 is located in the middle position between the first box body 1 and the second box body 101 after deployment, 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 areas. The electronic components installed in the first box body 1 generate less heat when working, and the electronic components installed in the second box body 101 generate more heat when working. With the help of the barrier of argon gas filled in the elastic airbag 6, the probability of heat exchange between the first box body 1 and the second box body 101 can be greatly reduced, so that the airflow heat dissipation in the first box body 1 and the second box body 101 is independent of each other. A low-power cooling fan 303 is used in the first box body 1 to transport the airflow, and a high-power turbofan 307 is used in the second box body 101 to transport the airflow. Under the zoning setting, the heat dissipation in the device is more targeted, and the classified and zoned processing is conducive to optimizing the heat dissipation and cooling in 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, the elastic airbag 6 arranged between the electronic components in the first box body 1 and the second box body 101 is squeezed to wrap and support the electronic components on the upper and lower sides, and provide buffer protection for the electronic components in the first box body 1 and the second box body 101;

[0059] When the device is used, the lock 103 on the first box body 1 and the box cover 102 is released, and the box cover 102 is flipped back to open, so that the control panel 104 embedded on the top of the first box body 1 is exposed, and the lifting mechanism is driven to extend through the linkage mechanism, so that the first box body 1 and the second box body 101 are separated from each other, and the filter belt 2 between the first box body 1 and the second box body 101 is stretched out. Then the staff connects the winding of the transformer to be tested with the device, and tests the winding of the transformer to be tested through the device. During the test, the cooling fan 303 and the turbofan 307 are powered on and started, and the external airflow enters the first box body 1 from the bottom of the first box body 1 through the filter belt 2, and with the help of the first guide pipe 30 2 and the first air box 3, and is sprayed outward through the first spray hole 301. Another airflow passes through the filter belt 2 and enters the second box 101 from the top, and is sprayed outward through the second spray hole 305 with the help of the overhead plate 308, the second guide pipe 306 and the second air box 304. Under the flow of airflow, the internal heat dissipation of the device is guaranteed to be stable. The elastic airbag 6 cooperates with the barrier of the argon gas inside it to divide the internal area of ​​the device into two relatively independent heat dissipation spaces, which do not interfere with each other, which is conducive to achieving optimized heat dissipation and cooling. The airflows sprayed from the first spray hole 301 and the second spray hole 305 blow on the surface of the control panel 104 to automatically clean the surface of the control panel 104.

[0060] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which 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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