Mechanical interlocked no-load voltage regulating transformer

Abstract

The utility model provides a kind of no-load regulation transformer with mechanical interlock, including transformer main body and no-load regulation switch main body, while it needs to be explained, no-load regulation switch no-load tapping switch is a kind of equipment for no-load regulation transformer, for switching the tapping of transformer in the state of no-load of transformer, to adjust the output voltage of transformer, belong to prior art, further including rotary setting in no-load regulation switch main body inside steering middle shaft, the outer wall of no-load regulation switch main body is equipped with sealing cover, and is fixed on transformer main body, because the utility model is equipped with sealing cover with display port and display panel, and the contact head and reset component matched with it, gear switching state is directly displayed, and operator can rotate steering middle shaft by knob when gear switching, contact head is driven to abut on the contact seat of corresponding gear, and display panel is simultaneously pushed to move, so that current gear state is clearly shown.

Description

Technical Field

[0001] This utility model relates to the technical field of transformers, specifically to a non-excitation voltage regulating transformer with mechanical interlock. Background Technology

[0002] Non-excitation voltage regulating transformers are widely used in power systems. They are mainly used to adjust the output voltage of the transformer in a de-energized (non-excitation) state to meet the voltage requirements under different load conditions. Their working principle is to switch the transformer taps by switching the transformer taps through a non-excitation voltage regulating switch (non-excitation tap changer), thereby changing the transformer ratio and realizing voltage regulation. Because of their simple operation, low cost and relatively simple maintenance requirements, this type of transformer has been widely used in medium and low voltage power distribution systems, and is especially suitable for scenarios where the voltage regulation accuracy requirements are not high and the load changes are infrequent.

[0003] Currently, common transformers on the market are divided into on-load tap-changing transformers and off-load tap-changing transformers. The off-load tap-changing switch is the core component of the off-load tap-changing transformer, used to switch taps to adjust the output voltage when the transformer is not energized. In actual operation, the operator rotates the central shaft in the shifting mechanism to adjust the voltage. The operation is relatively simple. However, in practical applications, the operator often has to rely on external shift indicators to observe the shift position. This reference is not intuitive and is not easy to observe. The operator needs to concentrate to identify it, which increases the difficulty of operation and the risk of error. At the same time, the recognition of the shift position is not high after the shift, which is not convenient for daily maintenance and observation. This affects the operating efficiency and maintenance convenience of the equipment to a certain extent, limiting the application of off-load tap-changing transformers in a wider range of scenarios. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of traditional non-excitation voltage regulating transformers that rely solely on external gear shift indicators and reference representations, which are not intuitive and difficult to observe. This will enable operators to quickly and accurately identify the gear position, thus preventing the risk of misoperation due to difficulty in identification.

[0005] The technical solution adopted to solve the above technical problems is:

[0006] A non-excitation voltage regulating transformer with mechanical interlock includes a transformer body and a non-excitation voltage regulating switch body, and also includes a steering shaft rotatably disposed inside the non-excitation voltage regulating switch body. The outer wall of the non-excitation voltage regulating switch body is provided with a sealing cover. The top of the sealing cover is provided with multiple display ports corresponding to the voltage regulation positions. Each of the multiple display ports is provided with a display panel. One side of each of the multiple display panels is connected to a reset component. The movable end of each of the multiple reset components is connected to a contact seat. The inner side of each of the multiple contact seats is provided with a matching contact head. The contact head is fixedly connected to the shaft wall of the steering shaft. When the knob rotates the steering shaft to different positions, it drives the contact head to press against the position indicated by the corresponding contact seat, which is displayed on the display panel.

[0007] As a preferred embodiment of this utility model, the reset assembly includes a movable bracket fixedly installed on one side of the contact seat, and the movable bracket is slidably installed inside the sealing cover. A limit spring is detachably installed on one side of the movable bracket, and the display panel is fixedly connected to the movable bracket.

[0008] As a preferred technical solution of this utility model, the limiting spring is provided with a matching limiting rod inside, and one end of the limiting rod is slidably connected to the inside of the movable card seat, while the other end of the limiting rod is threadedly installed inside the sealing cover by a locking bolt.

[0009] As a preferred embodiment of this utility model, the opposite ends of the plurality of abutment seats are all smoothly disposed, and the inner sidewalls of the plurality of abutment seats are all matched in size with the outer sidewalls of the abutment head.

[0010] As a preferred embodiment of this utility model, each of the multiple display ports is equipped with a viewing window, through which the open state of the display panel can be observed.

[0011] As a preferred embodiment of this utility model, a rotary block is connected to the upper end of the steering shaft for rotating the steering shaft by turning the knob.

[0012] As a preferred embodiment of this utility model, a mounting frame is connected to the bottom of the transformer body, and multiple casters are connected to the bottom of the mounting frame.

[0013] The beneficial effects of this utility model are as follows:

[0014] Beneficial effect 1

[0015] This utility model achieves intuitive display of gear switching status by setting a sealing cover with a display port and display panel, as well as a matching contact head and reset component. When switching gears, the operator can rotate the steering shaft by turning the knob, which will cause the contact head to press against the contact seat of the corresponding gear, and at the same time push the display panel to move, thus clearly displaying the current gear status.

[0016] Benefit 2

[0017] The structural design of this utility model adopts a detachable installation method for the limit spring and limit rod in the reset assembly, which makes it convenient to replace the spring when needed and ensures long-term stable operation of the equipment. At the same time, the movable bracket inside the sealing cover is slidably installed, and together with the limit rod and locking bolt, it further limits the horizontal movement of the movable bracket, ensuring that the display panel can display the gear status normally.

[0018] In addition, the viewing window installed inside the display port not only facilitates observation of the display panel's open status, but also prevents dust or rainwater from entering the equipment during outdoor use, thus extending the equipment's service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the reset component structure of this utility model;

[0021] Figure 3 This is a partial cross-sectional structural diagram of the present invention;

[0022] Figure 4 This is a schematic diagram of the overall structure of this utility model.

[0023] In the diagram: 1. Transformer body; 2. Off-grid voltage regulator switch body; 21. Steering shaft; 22. Sealing cover; 23. Display port; 24. Display panel; 25. Limit spring; 26. Movable bracket; 27. Contact seat; 28. Contact head; 3. Limit rod; 4. Locking bolt; 5. Rotary block; 6. Mounting bracket; 7. Casters. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0029] Example 1

[0030] exist Figures 1-4 This utility model provides a technical solution: a non-excitation voltage regulating transformer with mechanical interlock, comprising a transformer body 1 and a non-excitation voltage regulating switch body 2. It should be noted that the non-excitation voltage regulating switch is a device used in non-excitation voltage regulating transformers to switch the transformer's taps in a non-excitation state to adjust the transformer's output voltage. This is prior art. It also includes a rotating central shaft 21 rotatably disposed inside the non-excitation voltage regulating switch body 2. A sealing cover 22 is provided on the outer wall of the non-excitation voltage regulating switch body 2 and fixed to the transformer body 1. The top of the sealing cover 22 is provided with multiple display ports 23 corresponding to the pressure adjustment positions. Each display port 23 is provided with a display panel 24. The display panel 24 is used to display the open status of the corresponding position. Each side of the multiple display panels 24 is connected to a reset component. The movable end of each reset component is connected to a contact seat 27. The inner side of the multiple contact seats 27 is provided with a matching contact head 28. The contact head 28 is fixedly connected to the shaft wall of the steering shaft 21. When the knob steering shaft 21 is rotated to different positions, it drives the contact head 28 to press against the position indicated by the corresponding contact seat 27, and displays it through the display panel 24.

[0031] In one aspect of this embodiment, the reset assembly includes a movable retainer 26 fixedly mounted on one side of the contact seat 27, and the movable retainer 26 is slidably mounted inside the sealing cover 22. A limit spring 25 is detachably mounted on one side of the movable retainer 26. The display panel 24 is fixedly connected to the movable retainer 26. A matching limit rod 3 is provided inside the limit spring 25, and one end of the limit rod 3 is slidably connected inside the movable retainer 26. The other end of the limit rod 3 is threadedly mounted inside the sealing cover 22 by a locking bolt 4. The limit rod 3 is locked in place. Bolt 4 is connected to the sealing cover 22, which facilitates the replacement of the spring during subsequent maintenance. It also further limits the horizontal movement of the movable bracket 26, ensuring that the display panel 24 can move horizontally and display normally. When shifting gears, rotating the steering shaft 21 drives the contact head 28 to press against the corresponding contact seat 27 of the corresponding gear. At the same time, it pushes the movable bracket 26 to move horizontally outward, compresses the limiting spring 25 to retract, and drives the display panel 24 to move along one side of the display port 23, thereby displaying the status after shifting gears, which is convenient for actual observation and operation.

[0032] In one aspect of this embodiment, the opposite ends of the plurality of abutment seats 27 are all smoothly disposed, and the inner sidewalls of the plurality of abutment seats 27 are all matched in size with the outer sidewalls of the abutment head 28. The smooth disposal makes actual operation more convenient.

[0033] In one aspect of this embodiment, each of the plurality of display ports 23 is equipped with a viewing window, through which the open state of the display panel 24 can be observed, while also preventing external dust or rainwater from entering the interior when the device is used outdoors.

[0034] In one aspect of this embodiment, a rotary block 5 is connected to the upper end of the steering shaft 21 for rotating the steering shaft 21 by turning the knob. A mounting bracket 6 is connected to the bottom of the transformer body 1, and multiple casters 7 are connected to the bottom of the mounting bracket 6 to facilitate the transfer of the equipment.

[0035] The working principle of this utility model is as follows: Before operation, ensure the equipment is powered off. Then, rotate the central shaft 21 via the rotating block 5. A contact head 28 is fixedly connected to this central shaft. As the central shaft 21 rotates, the contact head 28 moves between multiple contact seats 27. When the contact head 28 presses against a contact seat 27, it pushes the movable retaining seat 26 connected to that contact seat 27 to move horizontally. A limit spring 25 is installed on one side of the movable retaining seat 26. When the contact head 28 pushes the movable retaining seat 26, the limit spring 25 is compressed, simultaneously causing the display panel 24 to move along one side of the display port 23, thus visually displaying the current gear position through the display panel 24. In the reset process, the limiting rod 3 inside the limiting spring 25 plays an auxiliary role. When the contact head 28 moves out of the corresponding contact seat 27, the corresponding contact head 28 is reset under the action of the limiting spring 25, indicating the closed state. Secondly, one end of the limiting rod 3 is slidably connected inside the movable card seat 26, and the other end is threadedly installed in the sealing cover 22 through the locking bolt 4. This structure not only facilitates the replacement of the spring during subsequent maintenance, but also further limits the horizontal movement of the movable card seat 26, ensuring that the display panel 24 can accurately display the gear status. In addition, the viewing window installed inside the display port 23 not only makes it easy for the operator to observe the opening status of the display panel 24, but also prevents dust or rainwater from entering the equipment when used outdoors, thus extending the service life of the equipment.

[0036] Throughout the operation, operators do not need to rely on complex external gear shifting indicators. They can quickly and accurately identify the gear position using only the intuitive display panel 24, reducing the risk of misoperation due to difficulty in identification. At the same time, this design also improves the ease of maintenance of the equipment, reduces maintenance costs, and makes it more suitable for use in complex environments and frequent operation scenarios.

[0037] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A non-excitation voltage regulating transformer with mechanical interlock, comprising a transformer body (1) and a non-excitation voltage regulating switch body (2), characterized in that: It also includes a rotating central shaft (21) rotatably disposed inside the non-excitation voltage regulating switch body (2). The outer wall of the non-excitation voltage regulating switch body (2) is provided with a sealing cover (22). The top of the sealing cover (22) is provided with multiple display ports (23) corresponding to the voltage regulation positions. The interior of each of the multiple display ports (23) is provided with a display panel (24). One side of each of the multiple display panels (24) is connected to a reset component. The movable end of each of the multiple reset components is connected to a contact seat (27). The inner side of each of the multiple contact seats (27) is provided with a matching contact head (28). The contact head (28) is fixedly connected to the shaft wall of the rotating central shaft (21). When the knob rotates the rotating central shaft (21) to different positions, it drives the contact head (28) to press against the corresponding position indicated by the contact seat (27) and displays it through the display panel (24).

2. The non-excitation voltage regulating transformer with mechanical interlocking according to claim 1, characterized in that: The reset assembly includes a movable bracket (26) fixedly installed on one side of the contact seat (27), and the movable bracket (26) is slidably installed inside the sealing cover (22). A limit spring (25) is detachably installed on one side of the movable bracket (26), and the display panel (24) is fixedly connected to the movable bracket (26).

3. A non-excitation voltage regulating transformer with mechanical interlocking according to claim 2, characterized in that: The limiting spring (25) has a matching limiting rod (3) inside, and one end of the limiting rod (3) is slidably connected to the inside of the movable card seat (26), and the other end of the limiting rod (3) is threadedly installed inside the sealing cover (22) by a locking bolt (4).

4. A non-excitation voltage regulating transformer with mechanical interlocking according to claim 2, characterized in that: The opposite ends of the plurality of abutment seats (27) are all smooth, and the inner sidewalls of the plurality of abutment seats (27) are all matched in size with the outer sidewall of the abutment head (28).

5. A non-excitation voltage regulating transformer with mechanical interlocking according to claim 1, characterized in that: Each of the multiple display ports (23) has a viewing window installed inside, through which the open state of the display panel (24) can be observed.

6. A non-excitation voltage regulating transformer with mechanical interlocking according to claim 1, characterized in that: The upper end of the steering shaft (21) is connected to a rotary block (5) for rotating the steering shaft (21) by turning the knob.

7. A non-excitation voltage regulating transformer with mechanical interlocking according to claim 1, characterized in that: The bottom of the transformer body (1) is connected to a mounting frame (6), and the bottom of the mounting frame (6) is connected to multiple casters (7).

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