Current transformer expander outer cover and current transformer

Abstract

The application is suitable for the technical field of current transformers, and provides a current transformer expander cover and a current transformer. The current transformer expander cover comprises: a partition plate arranged in the cover, the partition plate divides the cover into an upper layer and a lower layer; an expander is arranged in the lower layer; an oil level observation window is arranged on the side wall of the lower layer; a wireless sending module is arranged in the upper layer; a camera is arranged at the center of the partition plate, the camera faces the expander and is used for collecting the image on the top of the expander and sending the image to the wireless sending module; the wireless sending module transmits the image to an image display device; a laser pen is arranged on the partition plate, the laser pen is used for generating light rays that pass through the oil level observation window and are emitted out of the cover; and a ball is arranged in the side wall of the lower layer, after the ball is extruded by the expander, the movement of the ball makes an alarm circuit connected. The application can safely and effectively monitor the oil level of the current transformer.

Description

Technical Field

[0001] This application belongs to the field of current transformer technology, and particularly relates to the current transformer expander housing and the current transformer itself. Background Technology

[0002] Changes in the oil level of an oil-immersed current transformer cause changes in the position of the metal expansion joint. Therefore, observing the position of the metal expansion joint can determine the oil level of the current transformer. Currently, most oil level inspection windows for oil-immersed current transformers are made of glass. After prolonged operation, dust accumulation, moisture, and other factors can cause the inspection windows to become blurred, making it difficult for operators to accurately observe the oil level. Relying solely on irregular inspections by patrol personnel is insufficient for real-time and accurate assessment of the current transformer oil level. Rapid changes in the transformer oil level could be a precursor to an explosion; in such situations, relying on visual identification of the metal expansion joint's position poses a significant safety hazard to patrol personnel. Summary of the Invention

[0003] This application provides an expansion housing for a current transformer and a current transformer to enable safe and effective monitoring of the oil level in the current transformer.

[0004] This application is achieved through the following technical solution:

[0005] In a first aspect, embodiments of this application provide a current transformer expander housing, comprising: a partition inside the housing, the partition dividing the housing into an upper layer and a lower layer.

[0006] The expander is located inside the lower layer; the upper and lower surfaces of the lower layer form the stroke of the expander; the side wall of the lower layer has an oil level inspection window.

[0007] The upper layer contains a wireless transmission module.

[0008] A camera is installed in the center of the partition, facing the expander, to capture images of the top of the expander and send the images to the wireless transmission module; the wireless transmission module then transmits the images to the image display device.

[0009] A laser pointer is installed on the partition. The laser pointer is used to generate light that shines through the oil level inspection window and out of the outer casing. The angle of the laser pointer's light changes with the movement of the expander.

[0010] The lower side wall is equipped with ball bearings. When the ball bearings are squeezed by the expander, their movement activates the alarm circuit.

[0011] In conjunction with the first aspect, in some possible implementations, the first end of the laser pointer is connected to the partition via a movable pin, the second end of the laser pointer moves under the force of the expansion device, and at the same time the first end of the laser pointer rotates, causing the laser beam emission angle to change.

[0012] In conjunction with the first aspect, in some possible implementations, a reference line is provided on the top of the expander to indicate the oil level.

[0013] In conjunction with the first aspect, in some possible implementations, an insulating component is provided on one side of the ball bearing. The side of the insulating component near the inner surface of the lower layer is connected to one end of both the conductive rod and the spring. The other end of the spring is connected to the wires on both sides of the break point of the alarm circuit on the inner surface of the lower layer. When the other side of the ball bearing is squeezed by the expander, the spring compression causes the conductive rod to contact the break point of the alarm circuit on the inner surface of the lower layer, thus connecting the alarm circuit with the break point.

[0014] In conjunction with the first aspect, in some possible implementations, there are multiple balls, each located at a different height on the lower sidewall.

[0015] In conjunction with the first aspect, in some possible implementations, there are multiple balls arranged in two rows, with each ball in each row located at a different height on the lower sidewall; the two rows of balls are symmetrical about the oil level inspection window.

[0016] In conjunction with the first aspect, in some possible implementations, a power control module is also provided inside the upper layer; the power control module is used to control the supply of electrical energy to the wireless transmission module, camera and alarm circuit.

[0017] In conjunction with the first aspect, in some possible implementations, a solar panel is provided on the lower outer surface, which is used to provide power to the power control module, the wireless transmission module, the camera, and the alarm circuit.

[0018] In conjunction with the first aspect, in some possible implementations, a battery is installed between the solar panel and the lower outer surface. The battery is used to store the electrical energy generated by the solar panel; the battery is also used to provide power to the power control module, wireless transmission module, camera, and alarm circuit.

[0019] Secondly, embodiments of this application provide a current transformer, which includes a current transformer expander housing as described in any of the first aspects.

[0020] It is understandable that the beneficial effects of the second aspect mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here.

[0021] The beneficial effects of the embodiments in this application compared with the prior art are:

[0022] This application uses a camera to capture images of the top of the expander, the angle of the laser beam, and the alarm circuit to simultaneously monitor the oil level of the current transformer, making the obtained oil level information more accurate. In addition, staff do not need to get close to the current transformer to obtain oil level information, thus ensuring the personal safety of the staff.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the outer casing of a current transformer expander provided in one embodiment of this application;

[0026] Figure 2 This is an internal side view of the lower layer of the outer casing provided in an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of a laser pointer structure provided in one embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the top reference line of the expander provided in one embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the ball bearings and the expander being compressed according to an embodiment of this application;

[0030] Figure 6 This is a schematic diagram of the alarm circuit breakpoint provided in an embodiment of this application;

[0031] Figure 7 This is a schematic diagram of the ball position in one embodiment of this application. Detailed Implementation

[0032] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0033] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0034] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0035] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0036] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0038] Oil-immersed current transformers, used for measurement, metering, and protection in power systems, are widely applied in power grids at all levels. Because the volume of the transformer oil changes regularly with temperature, an expander is needed to compensate for the oil volume. Observing the positional changes of the expander through the oil level inspection window provides information on the volume of the insulating oil inside the transformer. Currently, most oil-immersed current transformer oil level inspection windows are made of glass. After prolonged operation, factors such as dust accumulation and moisture can cause the inspection window to gradually become blurred, making it difficult for operators to accurately observe the transformer oil level. Furthermore, rapid changes in the transformer oil level can be a precursor to an explosion; in such situations, relying on manual visual identification of the oil level is extremely dangerous. Therefore, achieving clear identification and remote monitoring of transformer oil levels is essential.

[0039] Based on the above problems, the current transformer expander cover in this embodiment can safely and effectively monitor the oil level of the current transformer.

[0040] Figure 1 This is a schematic diagram of the outer casing of a current transformer expander according to an embodiment of this application. Figure 1 As shown, the current transformer expander housing includes: a partition 11 inside the housing, which divides the housing into an upper layer 10 and a lower layer 20.

[0041] The expander 201 is located inside the lower layer 20; the upper and lower surfaces of the lower layer 20 form the stroke of the expander 201; the side wall of the lower layer 20 has an oil level inspection window 202.

[0042] The upper layer 10 has a wireless transmission module 101 inside.

[0043] A camera 102 is provided at the center of the partition 11, facing the expander 201, for capturing images of the top of the expander 201; the wireless transmission module 101 transmits the images to the image display device; and the images are sent to the wireless transmission module.

[0044] Specifically, the display device can record the highest and lowest oil level curves of the year. Staff can use this data to verify whether the expander capacity is designed reasonably, providing basic data for the design of expanders for similar current transformers.

[0045] A laser pointer 103 is provided on the partition 11. The laser pointer 103 is used to generate light that passes through the oil level inspection window 202 and exits the outer casing. The angle of the light emitted by the laser pointer 103 changes with the movement of the expander 201.

[0046] The lower layer 20 has a ball bearing 203 installed in the side wall. When the ball bearing 203 is squeezed by the expander 201, the movement of the ball bearing 203 connects the alarm circuit.

[0047] For example, such as Figure 2As shown, the first end A1 of the laser pointer 103 is connected to the partition 11 through the movable pin 104. The second end A2 of the laser pointer 103 moves under the upward force of the expander 201, while the first end A1 of the laser pointer 103 rotates, causing the light emitted from the laser pointer 103 to change.

[0048] Specifically, the principle of different oil levels corresponding to different laser beam angles is used to monitor the oil level, which is clearer and more accurate than visual observation in poor lighting conditions. The laser pointer must not obstruct the camera 102 during its setting and movement. To avoid obstructing the camera 102, the laser-generating part of the laser pointer can be placed in the upper layer 10, and only the pen barrel A (i.e., the part that contacts the expander 201) is connected to the movable pin 104.

[0049] Specifically, the structure of laser pointer 103 is as follows: Figure 3 As shown, the laser pointer 103 includes: a first end A1 of the laser pointer 103, a spring B, and a second end A2 of the laser pointer 103. The first end A1 of the laser pointer 103 has a barrel-shaped structure, and the second end A2 of the laser pointer 103 has a columnar structure. One end of the columnar structure is connected to the first end of the spring B, and the second end of the spring B is connected to the bottom of the barrel inside the barrel-shaped structure. When the spring is compressed, the second end A2 of the laser pointer 103 can be squeezed into the first end A1 of the laser pointer 103. The diameter of the second end A2 of the laser pointer 103 is slightly smaller than the diameter of the first end A1 of the laser pointer 103.

[0050] For example, the top of the expander 201 is provided with a reference line, which is used to indicate the oil level.

[0051] Specifically, such as Figure 4 As shown, the camera 102 can only capture a portion of the top of the expander 201. As the expander 201 moves upward, the number of reference line circles captured will decrease. When the oil level is higher (i.e., the top of the expander 201 is higher), the number corresponding to the reference line captured by the camera will be smaller.

[0052] Specifically, the camera 102 can also observe the distance between the upper part of the expander 201 and the partition 11, preventing other detection devices from falsely reporting the monitoring position.

[0053] Specifically, the reference line can also be a straight line with markings. As the expander 201 moves upward, the number of markings on the reference line decreases as the image is captured.

[0054] For example, such as Figure 5As shown, an insulating component 204 is provided on one side of the ball bearing 203. The side of the insulating component 204 near the inner surface 21 of the lower layer 20 is connected to one end of both the conductive rod 206 and the spring 205. The other end of the spring 205 is connected to the wires on both sides of the break point 23 of the alarm circuit on the inner surface 21 of the lower layer 20. When the other side of the ball bearing 203 is squeezed by the expander 201, the spring 205 is compressed, causing the conductive rod 206 to contact the break point 23 of the alarm circuit on the inner surface 21 of the lower layer 20, thus connecting the alarm circuit with the break point. When the other side of the ball bearing 203 is not squeezed by the expander 201, the conductive rod 206 is suspended above the break point of the alarm circuit, and the circuit is not connected. The surface of the spring 205 is covered with an insulating film, and the spring 205 will not connect the alarm circuit.

[0055] Specifically, in order to prevent the alternating current on the inner surface 21 of the lower layer 20 from affecting the direct current when the alarm circuit is connected, an insulating pad 22 is provided between the inner surface 21 of the lower layer 20 and the break point 23.

[0056] Specifically, the breakpoint of the alarm circuit is as follows: Figure 6 As shown, when the spring 205 is compressed and the conductive rod 206 contacts the break point 23 of the alarm circuit on the inner surface 21 of the lower layer 20, the conductive rod 206 fills the gap between the wires at both ends of the alarm circuit, thus forming a loop in the alarm circuit.

[0057] Specifically, the ball bearing 203 can roll when it comes into contact with the expander 201, rather than sliding directly across the expander 201. The purpose of this design is to make the friction between the ball bearing 203 and the expander 201 sliding friction, thereby reducing the wear of the expander 201 and protecting the expander 201.

[0058] For example, there are multiple balls, each located at a different height on the lower 20 sidewalls.

[0059] Specifically, the presence of multiple ball bearings allows for simultaneous monitoring of different oil levels. When the oil level changes rapidly, it can be assumed that an internal insulation fault has occurred, triggering the alarm circuit.

[0060] For example, there are multiple balls arranged in two rows, with each ball in each row located at a different height on the lower 20 sidewall.

[0061] For example, such as Figure 7 As shown, the two rows of ball bearings are symmetrical about the oil level inspection window 202. The two rows of ball bearings are close to the oil level inspection window 202. Setting them on both sides of the oil level inspection window 202 facilitates product processing, improves product manufacturing efficiency, and reduces manufacturing difficulty.

[0062] For example, the upper layer 10 also has a power control module 12 inside; the power control module 12 is used to control the transmission of power to the wireless transmission module 101, the camera 102 and the alarm circuit.

[0063] For example, a solar panel 30 is provided on the outer surface of the lower layer 20. The solar panel 30 is used to provide power to the power control module 12, the wireless transmission module 101, the camera 102 and the alarm circuit.

[0064] For example, a battery is disposed between the solar panel 30 and the outer surface of the lower layer 20. The battery is used to store the electrical energy generated by the solar panel 30. The battery is also used to provide power to the power control module 12, the wireless transmission module 101, the camera 102 and the alarm circuit.

[0065] The aforementioned current transformer expander casing uses a camera to capture images of the top of the expander, the laser beam angle, and the alarm circuit to simultaneously monitor the oil level of the current transformer, making the obtained oil level information more accurate. In addition, staff do not need to get close to the current transformer to obtain oil level information, thus ensuring the personal safety of the staff.

[0066] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0067] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A casing for a current transformer expander, characterized in that, The outer casing is equipped with a partition that divides it into an upper and lower layer. An expander is located inside the lower layer. The distance between the upper and lower surfaces of the lower layer is the stroke of the expander. An oil level inspection window is located on the side wall of the lower layer. A wireless transmission module is located inside the upper layer. A camera is positioned at the center of the partition, facing the expander, to capture an image of the top of the expander and transmit the image to the wireless transmission module. The wireless transmission module then transmits the image to an image display device. A laser pointer is provided on the partition plate. The laser pointer is used to generate light that passes through the oil level inspection window and exits the outer cover. The angle of the laser pointer's light emission changes with the movement of the expander. The lower layer has a ball bearing installed in its side wall. When the ball bearing is squeezed by the expander, the movement of the ball bearing activates the alarm circuit. The first end of the laser pointer is connected to the partition via a movable pin. The second end of the laser pointer moves under the force of the expansion device, while the first end of the laser pointer rotates, causing the angle of the laser beam to change.

2. The current transformer expander housing as described in claim 1, characterized in that, A reference line is provided on the top of the expander, which is used to indicate the oil level.

3. The current transformer expander housing as described in claim 1, characterized in that, An insulating component is provided on one side of the ball bearing. The side of the insulating component near the inner surface of the lower layer is connected to one end of the conductive rod and one end of the spring. The other end of the spring is connected to the wires on both sides of the break point of the alarm circuit on the inner surface of the lower layer. When the other side of the ball bearing is squeezed by the expander, the spring is compressed, causing the conductive rod to contact the break point of the alarm circuit on the inner surface of the lower layer, thus connecting the alarm circuit with the break point.

4. The current transformer expander housing as described in claim 1, characterized in that, There are multiple balls, each located at a different height on the lower sidewall.

5. The current transformer expander housing as described in claim 1, characterized in that, The ball bearings are multiple and arranged in two rows, with each ball bearing in each row located at a different height on the lower sidewall. The two rows of ball bearings are symmetrical about the oil level observation window.

6. The current transformer expander housing as described in claim 1, characterized in that, The upper layer also includes a power control module; the power control module is used to control the supply of electrical energy to the wireless transmission module, the camera and the alarm circuit.

7. The current transformer expander housing as described in claim 6, characterized in that, The lower outer surface is provided with a solar panel, which is used to provide power to the power control module, the wireless transmission module, the camera and the alarm circuit.

8. The current transformer expander housing as described in claim 7, characterized in that, Also includes: A storage battery is provided for storing electrical energy generated by the solar panel; the storage battery is also used to provide power to the power control module, the wireless transmission module, the camera and the alarm circuit.

9. A current transformer, characterized in that, Includes the current transformer expander housing as described in any one of claims 1-8.

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