Current transformer

Abstract

This application relates to a current transformer. The current transformer includes a base plate, a transformer body, a housing, and two mounting plates. During installation, the transformer body is placed inside the housing through mounting holes and connected to the base plate, thus securing the transformer body. The mounting plates are then placed over the corresponding mounting holes, and are detachably connected to the housing, completing the placement of the transformer body within the housing. During operation, the transformer body measures, monitors, and protects circuits, generating significant heat. A ventilation assembly expels the high-temperature gas from the housing through connection holes, allowing air circulation within the housing and cooling the transformer body. This improves the lifespan of the current transformer. Simultaneously, the housing and mounting plates protect the transformer body from damage caused by dust or other impacts during operation.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to current transformers. Background Technology

[0002] A current transformer is an electrical device used to measure and protect current in a circuit. It converts a large current on the primary side into a smaller current on the secondary side to facilitate circuit measurement, monitoring, and protection. The working principle of a current transformer is based on the law of electromagnetic induction. It mainly consists of a closed iron core and two coils wound around the core: a primary winding and a secondary winding. The primary winding typically has fewer turns and is directly connected in series with the main circuit to be measured; the secondary winding has more turns and is connected to the measuring instrument or protection device. Therefore, current transformers often generate a lot of heat during actual use. Workers usually directly ventilate the transformer to quickly cool it down. However, dust inevitably exists in the air, which can affect the transformer's contact and reduce its service life.

[0003] In the prior art, a current transformer with dustproof effect can protect the current transformer that is fixedly connected to the mounting plate from dust, reducing the possibility of dust in the air coming into contact with the current transformer and reducing the service life of the current transformer. It is also easy to install and disassemble, and easy to maintain the current transformer.

[0004] However, in actual use, although the mounting plate serves to prevent dust, it also isolates the current transformer from airflow to some extent, which leads to faster heating of the current transformer and still poses a risk of damage. Utility Model Content

[0005] Therefore, it is necessary to provide a current transformer that addresses the problem that while the mounting plate in existing current transformers serves as a dustproof element, it also isolates the current transformer from airflow to some extent, leading to faster heating and increased risk of damage.

[0006] A current transformer, the current transformer comprising:

[0007] Base plate;

[0008] The transformer body is mounted on the base plate;

[0009] A cover is provided on the transformer body and connected to the base plate. The cover has mounting holes on both sides along the first direction and connection holes on the side wall along the second direction.

[0010] Two mounting plates, each covering one of the two mounting holes, are detachably connected to the cover; and

[0011] An exhaust assembly is inserted through the connection hole and connected to the cover. The first direction, the second direction, and the third direction are perpendicular to each other, and the third direction is the thickness direction of the base plate.

[0012] In one embodiment, the cover has connection holes on both sides along the second direction, and there are two exhaust components, each of which passes through a corresponding connection hole.

[0013] In one embodiment, the exhaust assembly includes a connecting plate and a fan;

[0014] The connecting plate covers the connecting hole and is connected to the cover. The connecting plate has multiple exhaust holes along the second direction. The fan is located on the side of the connecting plate close to the transformer body.

[0015] In one embodiment, the exhaust assembly further includes a wind box, which is disposed on the side of the connecting plate near the current transformer body and has a plurality of box holes. The wind box passes through the connecting holes, and the fan is disposed inside the wind box.

[0016] In one embodiment, the current transformer further includes a cooler, and the cover has a cooling hole on the side wall opposite to the base plate in the third direction. The cooler passes through the cooling hole and is connected to the inner wall of the cooling hole.

[0017] In one embodiment, the current transformer further includes a filter screen, and the cooling hole has multiple mounting slots on both sides of the second direction and / or both sides of the third direction. The filter screen covers the cooler, and the side of the filter screen closest to the transformer body has multiple protrusions that correspond one-to-one with the multiple mounting slots. The protrusions are movably inserted into the corresponding mounting slots.

[0018] In one embodiment, the current transformer further includes two cleaning components, which are spaced apart along the first direction. The two ends of the cleaning components are slidably connected to the two side walls of the cover, which are spaced apart along the second direction. The cleaning components are movable relative to the cover along the third direction to clean the surface of the transformer body.

[0019] In one embodiment, the cleaning assembly includes a cleaning component and a guide rod. The two ends of the guide rod are slidably connected to the two side walls of the cover, which are spaced apart along the second direction. The guide rod is movable relative to the cover along the third direction. The cleaning component is disposed on the side of the guide rod close to the transformer body.

[0020] In one embodiment, the cleaning assembly further includes two guide rails, which are respectively disposed on two side walls of the cover spaced apart along the second direction. The guide rails extend along the third direction, and the two ends of the guide rod are slidably connected to the two guide rails respectively.

[0021] In one embodiment, the current transformer further includes two fixing components, which include: two fixing blocks, a sliding rod, and a fixing plate;

[0022] The two fixing components are disposed on the side of the base plate away from the cover, and the two fixing components are spaced apart along the first direction;

[0023] Two fixing blocks are spaced apart on the base plate along the second direction. The two ends of the sliding rod are respectively connected to the two fixing blocks. The fixing plate has a guide hole along the second direction. The sliding rod passes through the guide hole so that the fixing plate can slide and engage with the sliding rod along the second direction.

[0024] The fixing plate has multiple fixing holes along the third direction to allow the fixing plate to be installed in the position to be installed.

[0025] During installation, the aforementioned current transformer is placed inside the enclosure through the mounting holes and connected to the base plate to secure it. A mounting plate is then placed over the corresponding mounting holes, and the mounting plate is detachably connected to the enclosure, thus completing the installation of the current transformer inside the enclosure. During operation, the current transformer measures, monitors, and protects the circuits, generating a significant amount of heat. The high-temperature gas inside the enclosure is expelled through the connection holes via the exhaust assembly, allowing air circulation within the enclosure to cool the current transformer and extend its service life. Simultaneously, the enclosure and mounting plate protect the current transformer from damage caused by dust or other impacts during operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a current transformer according to one embodiment.

[0027] Figure 2 for Figure 1 Exploded view of the mounting plate and filter screen.

[0028] Figure 3 for Figure 1 An exploded view of the ventilation system from another perspective.

[0029] Figure 4 for Figure 1 An exploded view of the fixed components from another perspective.

[0030] Explanation of icon numbers:

[0031] 10-Current transformer;

[0032] 100-Base Plate;

[0033] 200 - Current transformer body;

[0034] 300 - Cover; 310 - Mounting hole; 320 - Connection hole; 330 - Cooling hole; 340 - Mounting slot; 350 - Second connection hole;

[0035] 400 - Mounting plate; 410 - Baffle; 420 - Connector; 430 - Handle;

[0036] 500 - Exhaust assembly; 510 - Connecting plate; 510a - Exhaust vent; 510b - First connecting hole; 520 - Fan; 530 - Air box; 530a - Box hole;

[0037] 600 - Refrigerator; 610 - Filter; 620 - Protrusion;

[0038] 700 - Cleaning assembly; 710 - Cleaning component; 720 - Guide rod; 730 - Guide rail;

[0039] 800-Fixing component; 810-Fixing block; 820-Sliding rod; 830-Fixing plate; 830a-Guide hole; 830b-Fixing hole;

[0040] OX - First direction; OY - Second direction; OZ - Third direction. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0047] See Figure 1 , Figure 1 A schematic diagram of the structure of a current transformer 10 according to an embodiment of this application is shown. The current transformer 10 provided in an embodiment of this application includes: a base plate 100, a transformer body 200, a cover 300, and two mounting plates 400.

[0048] See Figure 1 , Figure 2 as well as Figure 3 In the aforementioned current transformer 10, the transformer body 200 is mounted on the base plate 100, and the cover 300 covers the transformer body 200 and is connected to the base plate 100. (See reference...) Figure 2 and Figure 3 The cover 300 has mounting holes 310 on both sides along the first direction OX, and connecting holes 320 on the sidewall along the second direction OY. (See reference) Figure 2 and Figure 3 Two mounting plates 400 respectively cover two mounting holes 310, and the mounting plates 400 are detachably connected to the cover 300. (See reference...) Figure 2 and Figure 3 The exhaust assembly 500 passes through the connection hole 320 and is connected to the cover 300. The first direction OX, the second direction OY, and the third direction OZ are perpendicular to each other, and the third direction OZ is the thickness direction of the base plate 100.

[0049] During installation, the current transformer 10 is installed by placing the transformer body 200 inside the housing 300 through the mounting hole 310 and connecting it to the base plate 100, thereby fixing the transformer body 200. Then, the mounting plate 400 is placed over the corresponding mounting hole 310, and the mounting plate 400 is detachably connected to the housing 300, thus completing the installation of the transformer body 200 inside the housing 300. During operation, the transformer body 200 measures, monitors, and protects the circuits, generating a large amount of heat. The high-temperature gas inside the housing 300 is discharged through the connection hole 320 by the exhaust assembly 500, thus achieving air circulation within the housing 300 and cooling the transformer body 200. This improves the service life of the current transformer 10. Simultaneously, the housing 300 and mounting plate 400 protect the transformer body 200 from damage caused by dust or other impacts during operation.

[0050] Specifically, two baffles 410 are respectively provided on both sides of the cover 300 along the first direction OX. The two side walls of the cover 300 along the second direction OY protrude from the top wall of the cover 300 along the first direction OX. The baffles 410 are connected to the side walls of the cover 300 along the second direction OY and are perpendicular to the first direction OX. The baffles 410 extend along the third direction OZ, so that the mounting plate 400 can be inserted between the top of the cover 300 and the top of the baffles 410, so that the two ends of the mounting plate 400 are limited along the first direction OX and the second direction OY. If it is necessary to remove the mounting plate 400, simply lift the mounting plate 400 and pull it out from between the cover 300 and the baffles 410.

[0051] Preferably, the mounting plate 400 is a transparent plate, such as a transparent glass plate or a transparent plastic plate, so as to facilitate observation of the interior of the cover 300.

[0052] The mounting plate 400 has a handle 430 on the side facing away from the floor. By grasping the handle 430, the mounting plate 400 can be lifted or lowered, thus facilitating the disassembly and installation of the mounting plate 400.

[0053] In other embodiments, the mounting plate 400 and the cover 300 can be detachably connected by fasteners, and the specific method of detachable connection between the mounting plate 400 and the cover 300 is not limited here.

[0054] See Figure 2 and Figure 3In one embodiment, the cover 300 has connection holes 320 on both sides along the second direction OY, and there are two exhaust components 500. The two exhaust components 500 are respectively inserted through the corresponding connection holes 320, so that the cover 300 is transparent along the second direction OY. The two exhaust components 500 can exhaust the high temperature gas inside the cover 300 along the second direction OY, thereby improving the cooling efficiency.

[0055] See Figure 2 and Figure 3 In one embodiment, the exhaust assembly 500 includes a connecting plate 510 and a fan 520. The connecting plate 510 covers the connecting hole 320 and is connected to the cover 300. The connecting plate 510 has a plurality of exhaust holes 510a along the second direction OY. The fan 520 is disposed on the side of the connecting plate 510 near the current transformer body 200. The fan 520 is fixed to the cover 300 by the connecting plate 510, and the fan 520 can exhaust the high-temperature gas inside the cover 300 through the exhaust holes 510a along the second direction OY.

[0056] See Figure 2 and Figure 3 In one embodiment, the exhaust assembly 500 further includes a bellows 530. The bellows 530 is disposed on the side of the connecting plate 510 near the transformer body 200 and has multiple box holes 530a. The bellows 530 passes through the connecting hole 320. The fan 520 is disposed inside the bellows 530. When the fan 520 rotates, it drives the high-temperature gas inside the cover 300 through the box holes 530a, the inside of the cover, and the connecting hole 320 to be discharged from the cover 300. The bellows 530 can prevent the rotation of the fan 520 from damaging the transformer body 200.

[0057] Preferably, the connecting plate 510 has a first connecting hole 510b, the cover 300 has a second connecting hole 350, and the connector 420 passes through the first connecting hole 510b and the second connecting hole 350 to detachably connect the connecting plate 510 and the cover 300.

[0058] The fasteners and connectors 420 can be bolts, screws, or threaded rods, as long as they can be detachably connected.

[0059] See Figure 2 and Figure 3 In one embodiment, the current transformer 10 further includes a cooler 600. The cover 300 has a cooling hole 330 on the side wall opposite to the base plate 100 along the third direction OZ. The cooler 600 passes through the cooling hole 330 and is connected to the inner wall of the cooling hole 330, thereby cooling the transformer body 200 through the cooler 600.

[0060] See Figure 2 and Figure 3 In one embodiment, the current transformer 10 further includes a filter 610. Multiple mounting slots 340 are provided on both sides of the cooling port 330 along the second direction OY and the third direction OZ. The filter 610 covers the cooler 600. Multiple protrusions 620, corresponding one-to-one with the mounting slots 340, are provided on the side of the filter 610 closest to the transformer body 200. The protrusions 620 are movably inserted into the corresponding mounting slots 340. Under the action of gravity, the filter 610 covers the cooler 600, and the protrusions 620 are inserted into the corresponding mounting slots 340, thereby limiting the filter 610 along the first direction OX and the second direction OY. When the filter 610 needs to be removed, simply lift the filter 610 to pull the protrusions 620 out of the mounting slots 340, thus removing the filter 610 from the cover 300. The mounting slots 340 can also be through holes, as long as they allow the protrusions 620 to be inserted. Preferably, the sidewall of the protrusion 620 abuts against the inner wall of the mounting groove 340 and has friction, thereby preventing the protrusion 620 from easily coming out of the mounting groove 340.

[0061] In another embodiment, the cooling hole 330 has multiple mounting slots 340 on both sides along the second direction OY.

[0062] In another embodiment, the cooling hole 330 has multiple mounting slots 340 on both sides along the third direction OZ.

[0063] Specifically, the mounting groove 340 is located on the top wall of the cover 300 away from the transformer body 200 and surrounds the cooling hole 330 to ensure that the filter 610 can cover the cooling hole 330 and the cooler 600.

[0064] See Figure 2 and Figure 3 In one embodiment, the current transformer 10 further includes two cleaning components 700, which are arranged at intervals along a first direction OX. The two ends of the cleaning components 700 are slidably connected to the two side walls of the cover 300 that are spaced at intervals along a second direction OY. The cleaning components 700 can move relative to the cover 300 along a third direction OZ to clean the surface of the transformer body 200.

[0065] See Figure 2 and Figure 3In one embodiment, the cleaning assembly 700 includes a cleaning component 710 and a guide rod 720. The two ends of the guide rod 720 are slidably connected to the two side walls of the cover 300, which are spaced apart along the second direction OY. The guide rod 720 can move relative to the cover 300 along the third direction OZ. The cleaning component 710 is disposed on the side of the guide rod 720 close to the current transformer body 200, so that the guide rod 720 drives the cleaning component to move along the third direction OZ to clean the surface of the current transformer body 200 and discharge it to the cover 300 through the exhaust assembly 500, thereby achieving a dustproof effect.

[0066] See Figure 2 and Figure 3 In one embodiment, the cleaning component 700 further includes two guide rails 730, which are respectively disposed on the two side walls of the cover 300 spaced apart along the second direction OY. The guide rails 730 extend along the third direction OZ. The two ends of the guide rod 720 are slidably connected to the two guide rails 730 respectively. The guide rod 720 and the guide rails 730 are slidably connected along the third direction OZ, so that the guide rod 720 drives the cleaning chamber to move along the third direction OZ to clean the surface of the current transformer body 200 and discharge it from the cover 300 through the exhaust component 500, thereby achieving a dustproof effect.

[0067] Preferably, the cleaning assembly 700 further includes a power unit connected to the guide rail 730, so that the guide rail 730 drives the guide rod 720 to move in the third direction OZ. Specifically, the power unit can be one or more of a cylinder, a linear bearing, or a motor, and the specific form is not limited herein.

[0068] See Figure 3 and Figure 4 In one embodiment, the current transformer 10 further includes two fixing components 800, each comprising two fixing blocks 810, a sliding rod 820, and a fixing plate 830. The two fixing components 800 are disposed on the side of the base plate 100 opposite to the cover 300, and are spaced apart along a first direction OX. The two fixing blocks 810 are spaced apart on the base plate 100 along a second direction OY. The two ends of the sliding rod 820 are connected to the two fixing blocks 810 respectively. The fixing plate 830 has guide holes 830a along the second direction OY, through which the sliding rod 820 passes, allowing the fixing plate 830 to slide and engage with the sliding rod 820 along the second direction OY. The fixing plate 830 has multiple fixing holes 830b along a third direction OZ, allowing the fixing plate 830 to be installed in the desired position.

[0069] In this embodiment, a hole is provided at the installation location. The fastener needs to pass through the fixing hole 830b and the hole at the installation location to install the fixing plate 830 at the installation location. The fixing plate 830 slides and engages with the sliding rod 820 along the second direction OY, thereby adjusting the position of the fixing plate 830 to align the fixing hole 830b and the hole at the installation location. This facilitates the fastener in installing the current transformer 10 at the installation location. The two fixing components 800 are respectively spaced apart along the first direction OX, thereby improving the applicability to the holes at the installation location.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A current transformer, characterized in that, The current transformer includes: Base plate; The transformer body is mounted on the base plate; A cover is provided on the transformer body and connected to the base plate. The cover has mounting holes on both sides along the first direction and connection holes on the side wall along the second direction. Two mounting plates, each covering one of the two mounting holes, are detachably connected to the cover; and An exhaust assembly is inserted through the connection hole and connected to the cover. The first direction, the second direction, and the third direction are perpendicular to each other, and the third direction is the thickness direction of the base plate.

2. The current transformer according to claim 1, characterized in that, The cover has connection holes on both sides along the second direction, and there are two exhaust components, each of which passes through the corresponding connection hole.

3. The current transformer according to claim 1, characterized in that, The exhaust assembly includes a connecting plate and a fan; The connecting plate covers the connecting hole and is connected to the cover. The connecting plate has multiple exhaust holes along the second direction. The fan is located on the side of the connecting plate close to the transformer body.

4. The current transformer according to claim 3, characterized in that, The exhaust assembly also includes a wind box, which is located on the side of the connecting plate near the transformer body and has multiple box holes. The wind box passes through the connecting holes, and the fan is located inside the wind box.

5. The current transformer according to claim 1, characterized in that, The current transformer also includes a cooler. The cover has a cooling hole on the side wall opposite to the base plate in the third direction. The cooler passes through the cooling hole and is connected to the inner wall of the cooling hole.

6. The current transformer according to claim 5, characterized in that, The current transformer also includes a filter screen. The cooling hole has multiple mounting slots on both sides of the second direction and / or both sides of the third direction. The filter screen covers the cooler. The side of the filter screen closest to the transformer body has multiple protrusions that correspond one-to-one with the multiple mounting slots. The protrusions are movably inserted into the corresponding mounting slots.

7. The current transformer according to claim 1, characterized in that, The current transformer also includes two cleaning components, which are arranged at intervals along the first direction. The two ends of the cleaning components are slidably connected to the two side walls of the cover that are spaced apart along the second direction. The cleaning components can move relative to the cover along the third direction to clean the surface of the transformer body.

8. The current transformer according to claim 7, characterized in that, The cleaning assembly includes a cleaning component and a guide rod. The two ends of the guide rod are slidably connected to the two side walls of the cover that are spaced apart along the second direction. The guide rod is movable relative to the cover along the third direction. The cleaning component is disposed on the side of the guide rod close to the transformer body.

9. The current transformer according to claim 8, characterized in that, The cleaning component also includes two guide rails, which are respectively disposed on the two side walls of the cover spaced apart along the second direction. The guide rails extend along the third direction, and the two ends of the guide rod are slidably connected to the two guide rails respectively.

10. The current transformer according to claim 1, characterized in that, The current transformer also includes two fixing components, which include: two fixing blocks, a sliding rod, and a fixing plate; The two fixing components are disposed on the side of the base plate away from the cover, and the two fixing components are spaced apart along the first direction; Two fixing blocks are spaced apart on the base plate along the second direction. The two ends of the sliding rod are respectively connected to the two fixing blocks. The fixing plate has a guide hole along the second direction. The sliding rod passes through the guide hole so that the fixing plate can slide and engage with the sliding rod along the second direction. The fixing plate has multiple fixing holes along the third direction to allow the fixing plate to be installed in the position to be installed.

Images