Dry-type power frequency test transformer

Abstract

The invention discloses a dry-type power frequency test transformer, and relates to the technical field of dry-type power frequency test transformers, the dry-type power frequency test transformer comprises an annular ventilation plate, the annular ventilation plate is provided with an annular plate body, a plurality of ventilation holes are formed in the surface of the annular plate body, an annular cavity is formed in the annular plate body, and a high-pressure air pump is arranged at the bottom of the annular ventilation plate; the bottom of the annular ventilation plate is fixedly connected with a bottom rod, the inner wall of the annular ventilation plate is fixedly connected with a cooling rod, the top of the annular ventilation plate penetrates through and is fixedly connected with a dust filtering plate, and the top of the annular ventilation plate is fixedly connected with an arc-shaped flow guide plate. Air is pumped into the annular ventilation plate through the high-pressure air pump and is ejected upwards through the annular ventilation plate to push the air to flow upwards to accelerate the flowing speed, so that the efficiency of taking away heat by the air is improved; the problem that workers are inconvenient to get close to the dry-type transformer for traction and movement due to the fact that the temperature rises sharply after the dry-type transformer is used for a long time and heat dissipation is difficult through air convection is solved.

Description

Technical Field

[0001] The invention relates to the technical field of dry-type power frequency test transformers, and in particular to a dry-type power frequency test transformer. Background Art

[0002] The dry-type power frequency test transformer uses the principle of electromagnetic induction to pass the input power frequency AC power through the primary winding of the transformer to generate alternating magnetic flux in the iron core, thereby inducing high voltage in the secondary winding. It is mainly composed of iron core, winding, insulation material, etc. The dry-type power frequency test transformer adopts the new process and new material of coil epoxy vacuum casting and CD type iron core. Compared with the oil-immersed test transformer with the same capacity and voltage, it has the advantages of light weight, small size, beautiful shape, stable performance, easy to use and carry, no oil leakage, etc., and effectively weakens the leakage magnetic field and improves the insulation strength and moisture resistance. It is particularly suitable for power systems and power users to test the insulation performance of various electrical equipment on site, DC withstand voltage and leakage current test;

[0003] The existing dry-type power frequency test transformer is provided with universal wheels for moving the dry-type power frequency test transformer. However, after long-term use, the temperature of the dry-type transformer rises sharply and it is difficult to quickly dissipate heat through air convection, which makes it inconvenient for workers to approach it for towing and moving. Therefore, we propose a dry-type power frequency test transformer. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a dry-type power frequency test transformer, comprising:

[0005] Transformer body;

[0006] A base, wherein a motorized roller is disposed at the bottom of the base;

[0007] The heat dissipation device is used to speed up the flow of gas around the transformer by blowing gas to dissipate heat efficiently, so as to prevent the temperature of the dry-type transformer from rising sharply after long-term use, making it difficult to dissipate heat quickly through air convection, making it inconvenient for workers to approach it for towing and moving;

[0008] The anti-fall device is used to provide a blocking limit protection for the inner transformer to prevent the dry-type transformer from falling due to external forces when the dry-type transformer is towed and moved, causing a safety hazard;

[0009] The bottom of the base is rotatably connected to the top of the electric roller via a rotating bolt, the bottom of the heat dissipation device is fixedly connected to the top of the base, and the bottom of the anti-fall device is fixedly connected to the top of the base;

[0010] Wherein, the heat dissipation device comprises:

[0011] The annular ventilation plate has an annular plate body with a plurality of ventilation holes on the surface and an annular cavity inside. Air is drawn into the annular ventilation plate by a high-pressure air pump and ejected upward by the annular ventilation plate to push the gas upward to accelerate the flow speed to improve the efficiency of the gas taking away heat, so as to prevent the dry-type transformer from rapidly rising in temperature after long-term use and being difficult to quickly dissipate heat through air convection, resulting in inconvenience for workers to approach it for towing and moving. A high-pressure air pump is arranged at the bottom of the annular ventilation plate;

[0012] The bottom of the annular ventilation plate is connected to the top of the high-pressure air pump, and four high-pressure air pumps are provided, and the four high-pressure air pumps are evenly distributed at the bottom of the annular ventilation plate;

[0013] A motor is fixedly connected to the bottom of the base, and a driving shaft of the motor is fixedly connected to the bottom of the anti-fall device;

[0014] The bottom of the annular ventilation plate is fixedly connected to a bottom rod, and the inner wall of the annular ventilation plate is fixedly connected to a cooling rod. The cooling rod is arranged in the annular ventilation plate to cool the gas to be ejected, thereby preventing the gas around the transformer from only being able to take away the heat diffused from the outside and being unable to efficiently cool the transformer body. The top of the annular ventilation plate is penetrated and fixedly connected with a dust filter plate. By arranging a plurality of dust filter plates on the annular ventilation plate, it is convenient to block dust and other particulate debris, thereby preventing dust and other particulate debris around the transformer from falling into the annular ventilation plate when the annular ventilation plate is not ejecting cold air and being difficult to handle. The top of the annular ventilation plate is fixedly connected to an arc guide plate, and the arc guide plate is arranged on the annular ventilation plate to gradually guide the upward flowing gas to the inside, thereby preventing the different radius widths of the top and bottom of the transformer from causing poor gas flow effect near the top area of ​​the transformer;

[0015] The bottom of the bottom rod is fixedly connected to the top of the base, and four cooling rods are provided, and the four cooling rods are evenly distributed on the inner wall of the annular ventilation plate;

[0016] There are multiple dust filter plates, and the multiple dust filter plates are evenly distributed on the annular ventilation plate. There are four arc-shaped guide plates, and the four arc-shaped guide plates are evenly distributed on the annular ventilation plate.

[0017] Furthermore, the anti-falling device includes a limiting ring plate. When the limiting ring plate moves up to above the annular ventilation plate, the transformer body can be limited in an annular anti-falling manner to prevent the dry-type transformer from falling due to external forces when the dry-type transformer is towed and moved, causing a safety hazard. The top and bottom of the limiting ring plate are fixedly connected with a cleaning mechanism. The top of the limiting ring plate passes through and is threadedly connected with a threaded long rod. The top of the limiting ring plate passes through and is slidably connected with the limiting long rod. The limiting long rod fixed to the base passes through the limiting ring plate and limits it, preventing the limiting ring plate from rotating with the threaded long rod through the threaded cooperation with the threaded long rod and making it difficult to limit the transformer body from falling. The inner side of the limiting ring plate is fixedly connected with an annular rubber pad. An annular rubber pad made of elastic material is arranged on the inner side of the ring plate to elastically contact with the transformer body to prevent the transformer body from shaking when being towed and moving and colliding with the rigid limiting ring plate to cause damage; a concave ring piece is sleeved on the outer side of the annular rubber pad and fixedly connected; a concave ring piece with a smooth surface is arranged on the inner side of the limiting ring plate to wrap and cover the annular rubber pad to prevent dust and other granular debris around the transformer body from easily adhering to the surface of the annular rubber pad, thereby preventing the transformer body from being damaged by friction when being squeezed and contacted with the annular rubber pad; the bottom of the threaded long rod is rotatably connected to the top of the base through a rotating bolt; the bottom of the threaded long rod is fixedly connected to the driving shaft of the motor; the bottom of the limiting long rod is fixedly connected to the top of the base; and one side of the concave ring piece is fixedly connected to the inner side of the limiting ring plate.

[0018] Furthermore, the cleaning mechanism includes an annular wave plate and an annular arc plate, and the annular arc plate scrapes and cleans the surface of the threaded long rod and the surface of the limiting long rod as the limiting ring plate moves up and down, to prevent the limiting long rod and the surface of the threaded long rod from being attached with dust and other particulate debris accumulated too much, which affects the movement of the limiting ring plate and is prone to jamming; annular wave plates are sleeved on the outside of the limiting ring plate to cover multiple dust filter plates, to prevent the free flow of gas when the annular ventilation plate does not spray cold air upwards, causing dust in the air to accumulate on the dust filter plate and affect subsequent use; the outer surface of the annular arc plate is fixedly connected to an arc-shaped fixing rod, and the shape of the annular arc plate is fixed by arranging an arc-shaped fixing rod fixed to the limiting ring plate on the outside of the annular arc plate, to prevent the annular arc plate arranged on the outside of the threaded long rod from being stuck to the threaded long rod The textured surface will bend and deform to a large extent when it is in contact with the surface for a long time, which affects the cleaning effect. The outer surface of the annular arc piece is fixedly connected to an arc-shaped brush. When the arc-shaped brush moves, it rubs and cleans the threaded surfaces of the threaded long rod and the surface of the limiting long rod at all times to prevent dust particles that cannot be scraped off by the annular arc piece from remaining between the threaded surfaces of the threaded long rod and the surface of the limiting long rod. The annular wave plate is sleeved on the limiting ring plate and fixedly connected to the limiting ring plate. One end of the arc-shaped fixing rod away from the annular arc piece is fixedly connected to a side of the limiting ring plate close to the annular arc piece, and the side of the annular arc piece close to the annular wave plate is fixedly connected to a side of the limiting ring plate close to the arc-shaped fixing rod. A plurality of annular arc pieces are provided, and the plurality of annular arc pieces are evenly distributed on the top and bottom of the limiting ring plate.

[0019] The present invention has the beneficial effects:

[0020] 1. The present invention uses a high-pressure air pump to draw air into the annular ventilation plate and eject the air upward from the annular ventilation plate to push the gas upward to accelerate the flow speed, thereby improving the efficiency of the gas in taking away heat, preventing the dry-type transformer from rapidly rising in temperature after long-term use, making it difficult to quickly dissipate heat through air convection, resulting in inconvenience for workers to approach it for traction and movement. When the limit ring plate moves up to above the annular ventilation plate, the annular anti-reverse limit of the transformer body can be achieved, preventing the dry-type transformer from being affected by external forces when being towed and moved, causing the dry-type transformer to fall over and cause safety hazards. When the annular arc plate moves up and down with the limit ring plate, the surface of the threaded long rod and the surface of the limit long rod are scraped and cleaned, preventing the surface of the limit long rod and the surface of the threaded long rod from being attached to dust and other particulate debris. When too much accumulation affects the movement of the limit ring plate, it is easy to cause jamming.

[0021] 2. The present invention provides a heat dissipation device, and air is drawn into the annular ventilation plate by a high-pressure air pump and sprayed upward by the annular ventilation plate to push the gas upward to accelerate the flow speed, so as to improve the efficiency of the gas in removing heat, prevent the dry-type transformer from rapidly rising in temperature after long-term use, and it is difficult to quickly dissipate heat through air convection, which makes it inconvenient for workers to approach it for towing and moving, and provide a cooling rod in the annular ventilation plate to cool the gas that is about to be sprayed, so as to prevent the gas around the transformer from only taking away the heat diffused from the outside and being difficult to efficiently cool the transformer body, and provide an arc-shaped guide plate on the annular ventilation plate to gradually guide the upward-flowing gas inward, so as to prevent the different radius widths of the top and bottom of the transformer from causing poor gas flow effect near the top area of ​​the transformer, and provide multiple dust filter plates on the annular ventilation plate to facilitate the isolation of dust and other particulate debris, so as to prevent dust and other particulate debris around the transformer from falling into the annular ventilation plate when the annular ventilation plate is not spraying cold air and being difficult to handle.

[0022] 3. The present invention provides an anti-reverse device, and a limiting long rod fixed to the base penetrates the limiting ring plate and limits it, so as to prevent the limiting ring plate from rotating with the threaded long rod through the threaded cooperation with the threaded long rod and making it difficult to limit the transformer body from falling over. When the limiting ring plate moves up to above the annular ventilation plate, the annular anti-reverse limit of the transformer body can be realized, so as to prevent the dry-type transformer from falling over due to the influence of external force when the dry-type transformer is towed and moved, thereby causing a safety hazard. An annular rubber pad made of elastic material is provided on the inner side of the limiting ring plate to elastically contact with the transformer body, so as to prevent the transformer body from shaking when being towed and moved, colliding with the hard limiting ring plate and causing damage. A concave ring piece with a smooth surface is provided on the inner side of the limiting ring plate to wrap and cover the annular rubber pad, so as to prevent dust and other particulate debris around the transformer body from easily adhering to the surface of the annular rubber pad, thereby causing the transformer body to be damaged by friction when being squeezed and contacted with the annular rubber pad.

[0023] 4. The cleaning mechanism of the present invention is provided, and the annular arc sheet scrapes and cleans the surface of the threaded long rod and the surface of the limiting long rod as the limiting ring plate moves up and down, so as to prevent the limiting long rod and the surface of the threaded long rod from being attached with dust and other particulate debris and accumulation too much, which affects the movement of the limiting ring plate and causes it to be stuck. By arranging an arc fixing rod fixed to the limiting ring plate on the outside of the annular arc sheet to fix the shape of the annular arc sheet, it is prevented that the annular arc sheet arranged on the outside of the threaded long rod is in contact with the thread surface for a long time and a large degree of bending deformation occurs, which affects the cleaning effect. When the arc brush moves, it rubs and cleans the threaded surfaces of the threaded long rod and the surface of the limiting long rod at all times, so as to prevent dust particles that the annular arc sheet cannot scrape off remain between the threaded surfaces of the threaded long rod and the surface of the limiting long rod. By arranging annular wave plates on the outside of the limiting ring plate to cover multiple dust filter plates, it is prevented that when the annular ventilation plate does not spray cold air upward, the free flow of gas drives the dust in the air to accumulate on the dust filter plate, which affects the subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the dry-type power frequency test transformer of the present invention;

[0025] Figure 2 It is a schematic diagram of the bottom side cross-section structure of the dry-type power frequency test transformer of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the heat dissipation device of the present invention;

[0027] Figure 4 It is a schematic diagram of the side cross-section structure of the heat dissipation device of the present invention;

[0028] Figure 5 It is a schematic structural diagram of the anti-falling device of the present invention;

[0029] Figure 6 It is a partial structural schematic diagram of the anti-falling device of the present invention;

[0030] Figure 7 It is a schematic diagram of the cleaning mechanism structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the bottom structure of the cleaning mechanism of the present invention;

[0032] In the figure: 1. transformer body; 2. base; 3. electric roller; 4. heat dissipation device; 5. anti-fall device; 6. motor; 401. annular ventilation plate; 402. high-pressure air pump; 403. bottom rod; 404. cooling rod; 405. dust filter plate; 406. arc guide plate; 501. limiting ring plate; 502. cleaning mechanism; 503. threaded long rod; 504. limiting long rod; 505. annular rubber pad; 506. concave ring plate; 5021. annular wave plate; 5022. annular arc plate; 5023. arc fixing rod; 5024. arc brush. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0034] For the first embodiment, please refer to Figure 1-Figure 4 The present invention is a dry-type power frequency test transformer, comprising:

[0035] Transformer body 1;

[0036] A base 2, wherein a motorized roller 3 is disposed at the bottom of the base 2;

[0037] A heat dissipation device 4, which is used to accelerate the flow of gas around the transformer by blowing gas to dissipate heat efficiently;

[0038] An anti-fall device 5, which is used to provide a blocking and limiting protection for the inner transformer;

[0039] The bottom of the base 2 is rotatably connected to the top of the electric roller 3 via a rotating bolt, the bottom of the heat dissipation device 4 is fixedly connected to the top of the base 2, and the bottom of the anti-fall device 5 is fixedly connected to the top of the base 2;

[0040] Wherein, the heat dissipation device 4 comprises:

[0041] An annular ventilation plate 401, the annular ventilation plate 401 has an annular plate body with a plurality of ventilation holes on the surface and an annular cavity inside, and a high-pressure air pump 402 is arranged at the bottom of the annular ventilation plate 401;

[0042] The bottom of the annular ventilation plate 401 is connected to the top of the high-pressure air pump 402. Four high-pressure air pumps 402 are provided, and the four high-pressure air pumps 402 are evenly distributed at the bottom of the annular ventilation plate 401.

[0043] The bottom of the base 2 is fixedly connected with a motor 6, and the driving shaft of the motor 6 is fixedly connected with the bottom of the anti-fall device 5;

[0044] The bottom of the annular ventilation plate 401 is fixedly connected with a bottom rod 403, the inner wall of the annular ventilation plate 401 is fixedly connected with a cooling rod 404, the top of the annular ventilation plate 401 is penetrated and fixedly connected with a dust filter plate 405, and the top of the annular ventilation plate 401 is fixedly connected with an arc guide plate 406;

[0045] The bottom of the bottom rod 403 is fixedly connected to the top of the base 2, and four cooling rods 404 are provided, and the four cooling rods 404 are evenly distributed on the inner wall of the annular ventilation plate 401;

[0046] There are multiple dust filter plates 405, and the multiple dust filter plates 405 are evenly distributed on the annular ventilation plate 401. There are four arc-shaped guide plates 406, and the four arc-shaped guide plates 406 are evenly distributed on the annular ventilation plate 401. When in use, the transformer body 1 is placed on the inner side of the anti-falling device 5 on the base 2, and the transformer body 1 is protected from falling by the resisting limiting protection of the anti-falling device 5. When the transformer body 1 is working, the heat dissipation device 4 is used to blow the gas around the transformer body 1 to accelerate its flow to achieve the effect of high-speed heat dissipation. The high-pressure air pump 402 is started to draw external air into the annular ventilation plate 401. The gas enters the annular ventilation plate 401 and contacts the cooling rod 404 on the top of the inner wall of the annular ventilation plate 401 for cooling. The cooled gas diffuses to the surroundings and fills the inside of the annular ventilation plate 401 and The air is ejected upward through the dust filter plate 405, and the air is drawn into the annular ventilation plate 401 through the high-pressure air pump 402 and ejected upward from the annular ventilation plate 401 to push the gas upward to increase the flow speed, thereby improving the efficiency of the gas in taking away heat. The cold air ejected from the dust filter plate 405 accelerates the flow of gas around the transformer and quickly cools it down. The gas to be ejected is cooled down by arranging a cooling rod 404 in the annular ventilation plate 401. The ejected gas will contact the inner side of the arc guide plate 406 and gradually flow inward along the arc path of the arc guide plate 406 to the surface of the transformer body 1. The arc guide plate 406 is arranged on the annular ventilation plate 401 to gradually guide the upward-flowing gas inward. A plurality of dust filter plates 405 are arranged on the annular ventilation plate 401 to facilitate the isolation of dust and other particulate matter.

[0047] For the second embodiment, please refer to Figure 1-Figure 8The present invention provides a dry-type power frequency test transformer: the anti-fall device 5 includes a limiting ring plate 501, the top and bottom of the limiting ring plate 501 are fixedly connected with a cleaning mechanism 502, the top of the limiting ring plate 501 penetrates and is threadedly connected with a threaded long rod 503, the top of the limiting ring plate 501 penetrates and is slidably connected with a limiting long rod 504, the inner side of the limiting ring plate 501 is fixedly connected with an annular rubber pad 505, the outer side of the annular rubber pad 505 is sleeved and fixedly connected with a concave ring piece 506, the bottom of the threaded long rod 503 is rotatably connected to the top of the base 2 through a rotating bolt, the bottom of the threaded long rod 503 is fixedly connected to the driving shaft of the motor 6, the bottom of the limiting long rod 504 is fixedly connected to the top of the base 2, and one side of the concave ring piece 506 is fixedly connected to the inner side of the limiting ring plate 501;

[0048] The cleaning mechanism 502 includes an annular wave plate 5021 and an annular arc plate 5022, the outer surface of the annular arc plate 5022 is fixedly connected to an arc-shaped fixing rod 5023, the outer surface of the annular arc plate 5022 is fixedly connected to an arc-shaped brush 5024, the annular wave plate 5021 is sleeved on the limiting ring plate 501 and is fixedly connected to the limiting ring plate 501, one end of the arc-shaped fixing rod 5023 away from the annular arc plate 5022 is fixedly connected to a side of the limiting ring plate 501 close to the annular arc plate 5022, and the side of the annular arc plate 5022 close to the annular wave plate 5021 is fixedly connected to a side of the limiting ring plate 501 close to the arc-shaped fixing rod 5023 There are multiple annular arc pieces 5022, and the multiple annular arc pieces 5022 are evenly distributed on the top and bottom of the limiting ring plate 501. When in use, the transformer body 1 is placed in the inner area of ​​the limiting ring plate 501. When the transformer body 1 needs to be towed and moved, the motor 6 is started to drive the threaded long rod 503 to rotate. When the threaded long rod 503 rotates, it is threadedly matched with the limiting ring plate 501 and moves upward under the limit of the limiting long rod 504. The limiting long rod 504 fixed to the base 2 penetrates the limiting ring plate 501 and limits it. When the limiting ring plate 501 moves up to above the annular ventilation plate 401, the transformer body can be tightened. 1, an annular anti-reverse limit, by arranging an annular rubber pad 505 of elastic material on the inner side of the limiting ring plate 501 to elastically contact with the transformer body 1, by arranging a concave ring piece 506 with a smooth surface on the inner side of the limiting ring plate 501 to wrap and cover the annular rubber pad 505, when the limiting ring plate 501 moves, the top and bottom annular arc pieces 5022 are driven to move together, and the annular arc piece 5022 scrapes and cleans the surface of the threaded long rod 503 and the surface of the limiting long rod 504 as the limiting ring plate 501 moves up and down, and an arc-shaped fixing rod 5023 fixed to the limiting ring plate 501 is arranged on the outer side of the annular arc piece 5022 to prevent the threaded long rod 503 and the limiting long rod 504 from being reversed. The shape of the annular arc piece 5022 is fixed, and the arc brush 5024 on the outer surface of the annular arc piece 5022 moves together with the movement of the limiting ring plate 501. When the arc brush 5024 moves, it rubs and cleans the threaded surfaces of the threaded long rod 503 and the surface of the limiting long rod 504 at all times. When the temperature of the transformer body 1 is not high or the transformer body 1 is not working, the limiting ring plate 501 is driven to move by the threaded long rod 503, and the movement of the limiting ring plate 501 drives the annular wave plate 5021 to move to the top surface of the dust filter, and the annular wave plate 5021 is sleeved on the outside of the limiting ring plate 501 to cover multiple dust filter plates 405.

[0049] When the present invention is in operation, the transformer body 1 is placed inside the anti-falling device 5 on the base 2, and the transformer body 1 is protected from falling by the resisting limit protection of the anti-falling device 5. When the transformer body 1 is working, the heat dissipation device 4 is used to blow the gas around the transformer body 1 to accelerate its flow to achieve the effect of high-speed heat dissipation. The high-pressure air pump 402 is started to draw external air into the annular ventilation plate 401. The gas enters the annular ventilation plate 401 and contacts the cooling rod 404 on the top of the inner wall of the annular ventilation plate 401 for cooling. The cooled gas diffuses to the surroundings, fills the inside of the annular ventilation plate 401, and is ejected upwards through the dust filter plate 405. The air is drawn into the annular ventilation plate 401 by the high-pressure air pump 402 and is cooled by the annular ventilation plate 40 1 is ejected upward to push the gas upward to accelerate the flow speed to improve the efficiency of the gas taking away heat. The cold air ejected from the dust filter plate 405 accelerates the flow plate of the gas around the transformer and quickly cools it down. The cooling rod 404 is arranged in the annular ventilation plate 401 to cool the gas to be ejected. The ejected gas will contact the inner side of the arc guide plate 406 and gradually flow inward along the arc path of the arc guide plate 406 to the surface of the transformer body 1. The arc guide plate 406 is arranged on the annular ventilation plate 401 to gradually guide the upward flowing gas inward. By arranging multiple dust filter plates 405 on the annular ventilation plate 401, it is convenient to block dust and other particulate debris. The transformer body 1 is placed inside the limiting ring plate 501 When the transformer body 1 needs to be pulled and moved in the area, the motor 6 is started to drive the threaded long rod 503 to rotate. When the threaded long rod 503 rotates, it is threadedly matched with the limiting ring plate 501 and moves upward under the limit of the limiting long rod 504. The limiting long rod 504 fixed to the base 2 penetrates the limiting ring plate 501 and limits it. When the limiting ring plate 501 moves up to above the annular ventilation plate 401, the annular anti-reversal limit of the transformer body 1 can be achieved. An annular rubber pad 505 made of elastic material is arranged on the inner side of the limiting ring plate 501 to elastically contact with the transformer body 1. A concave ring piece 506 with a smooth surface is arranged on the inner side of the limiting ring plate 501 to wrap and cover the annular rubber pad 505. When the limiting ring plate 501 moves, it drives the top The annular arc piece 5022 moves together with the annular arc piece 5022 at the bottom. When the annular arc piece 5022 moves up and down with the limiting ring plate 501, the surface of the threaded long rod 503 and the surface of the limiting long rod 504 are scraped and cleaned. The shape of the annular arc piece 5022 is fixed by arranging an arc-shaped fixing rod 5023 fixed to the limiting ring plate 501 on the outside of the annular arc piece 5022. The arc-shaped brush 5024 on the outer surface of the annular arc piece 5022 moves together with the movement of the limiting ring plate 501. When the arc-shaped brush 5024 moves, it rubs and cleans the threaded surfaces of the threaded long rod 503 and the surface of the limiting long rod 504 at all times. When the temperature of the transformer body 1 is not high or the transformer body 1 is not working, the limiting ring plate 501 is driven to move by the threaded long rod 503.The movement of the limiting ring plate 501 drives the annular wave plate 5021 to move to the dust filter top surface position, and the multiple dust filter plates 405 are covered by sleeve-mounting the annular wave plate 5021 on the outer side of the limiting ring plate 501.

[0050] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A dry-type power frequency test transformer, characterized in that: include: Transformer body (1); A base (2), wherein a motorized roller (3) is provided at the bottom of the base (2); A heat dissipation device (4), the heat dissipation device (4) is used to accelerate the flow of gas around the transformer by blowing gas to achieve efficient heat dissipation; An anti-falling device (5), the anti-falling device (5) is used to provide a blocking and limiting protection for the transformer inside; The bottom of the base (2) is rotatably connected to the top of the electric roller (3) via a rotating bolt, the bottom of the heat dissipation device (4) is fixedly connected to the top of the base (2), and the bottom of the anti-fall device (5) is fixedly connected to the top of the base (2); Wherein, the heat dissipation device (4) comprises: An annular ventilation plate (401), the annular ventilation plate (401) comprising an annular plate body with a plurality of ventilation holes on the surface and an annular cavity arranged inside, and a high-pressure air pump (402) arranged at the bottom of the annular ventilation plate (401); The bottom of the annular ventilation plate (401) is connected to the top of the high-pressure air pump (402), and four high-pressure air pumps (402) are provided, and the four high-pressure air pumps (402) are evenly distributed at the bottom of the annular ventilation plate (401).

2. A dry-type power frequency test transformer according to claim 1, characterized in that: The bottom of the base (2) is fixedly connected to a motor (6), and the drive shaft of the motor (6) is fixedly connected to the bottom of the anti-fall device (5).

3. A dry-type power frequency test transformer according to claim 1, characterized in that: The bottom of the annular ventilation plate (401) is fixedly connected to a bottom rod (403), the inner wall of the annular ventilation plate (401) is fixedly connected to a cooling rod (404), the top of the annular ventilation plate (401) is penetrated by and fixedly connected to a dust filter plate (405), and the top of the annular ventilation plate (401) is fixedly connected to an arc-shaped guide plate (406).

4. A dry-type power frequency test transformer according to claim 3, characterized in that: The bottom of the bottom rod (403) is fixedly connected to the top of the base (2), and four cooling rods (404) are provided, and the four cooling rods (404) are evenly distributed on the inner wall of the annular ventilation plate (401).

5. A dry-type power frequency test transformer according to claim 3, characterized in that: A plurality of the dust filter plates (405) are provided, and the plurality of the dust filter plates (405) are evenly distributed on the annular ventilation plate (401); four arc-shaped guide plates (406) are provided, and the four arc-shaped guide plates (406) are evenly distributed on the annular ventilation plate (401).

6. A dry-type power frequency test transformer according to claim 1, characterized in that: The anti-fall device (5) comprises a limiting ring plate (501), the top and bottom of the limiting ring plate (501) are fixedly connected to a cleaning mechanism (502), the top of the limiting ring plate (501) is penetrated by and threadedly connected to a threaded long rod (503), the top of the limiting ring plate (501) is penetrated by and slidably connected to a limiting long rod (504), the inner side of the limiting ring plate (501) is fixedly connected to an annular rubber pad (505), and the outer side of the annular rubber pad (505) is sleeved and fixedly connected to a concave ring piece (506).

7. A dry-type power frequency test transformer according to claim 6, characterized in that: The bottom of the threaded long rod (503) is rotatably connected to the top of the base (2) via a rotating bolt, and the bottom of the threaded long rod (503) is fixedly connected to the driving shaft of the motor (6).

8. A dry-type power frequency test transformer according to claim 6, characterized in that: The bottom of the limiting long rod (504) is fixedly connected to the top of the base (2), and one side of the concave ring piece (506) is fixedly connected to the inner side of the limiting ring plate (501).

9. A dry-type power frequency test transformer according to claim 6, characterized in that: The cleaning mechanism (502) comprises an annular wave plate (5021) and an annular arc plate (5022), the outer surface of the annular arc plate (5022) being fixedly connected to an arc-shaped fixing rod (5023), and the outer surface of the annular arc plate (5022) being fixedly connected to an arc-shaped brush (5024).

10. A dry-type power frequency test transformer according to claim 9, characterized in that: The annular wave plate (5021) is sleeved on the limiting ring plate (501) and fixedly connected to the limiting ring plate (501); one end of the arc-shaped fixing rod (5023) away from the annular arc plate (5022) is fixedly connected to a side of the limiting ring plate (501) close to the annular arc plate (5022); a side of the annular arc plate (5022) close to the annular wave plate (5021) is fixedly connected to a side of the limiting ring plate (501) close to the arc-shaped fixing rod (5023); a plurality of the annular arc plates (5022) are provided, and the plurality of the annular arc plates (5022) are evenly distributed on the top and bottom of the limiting ring plate (501).

Images