A complete protection device for transformer neutral point

Abstract

The utility model relates to a transformer neutral point complete protection device belongs to the technical field of electric power equipment, including base, the support pipe of setting in the base upside and the mounting bracket of fixed mounting in support pipe top, the upside of mounting bracket is provided with disconnecting switch, lightning arrester and mutual inductor in proper order, be provided with adjusting assembly between mutual inductor and mounting bracket, be provided with lifting mechanism between support pipe and base, the lifting mechanism includes the guide pillar of fixed mounting in base top and protection box, support pipe sliding sleeve connection in the upside of guide pillar, the inside fixed mounting of protection box has drive motor. This transformer neutral point complete protection device, realize the height of mounting bracket and adjust, solved the existing transformer neutral point complete protection device when installing and using, not convenient according to the installation height of device adjustment of site condition, caused the connection inconvenience of device and transformer, influence the problem of use.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to a complete set of protection devices for the neutral point of a transformer. Background Technology

[0002] The transformer neutral point protection system is a neutral point protection device used in power, metallurgy, petrochemical and other fields. It is mainly used to prevent overvoltage damage to transformers caused by lightning strikes, single-phase grounding faults, etc. Its core functions include suppressing arc grounding overvoltage, regulating neutral point current characteristics and ensuring equipment insulation safety. The transformer neutral point protection system consists of components such as discharge gaps, disconnect switches, surge arresters, and current transformers.

[0003] Patent document CN207705765U discloses a complete set of transformer neutral point protection devices, including a T-shaped bracket, a neutral point disconnect switch, a surge arrester, a power transformer, and an online monitoring instrument. The neutral point disconnect switch, surge arrester, and power transformer are sequentially installed on the upper part of the T-shaped bracket. The insulating part of the neutral point disconnect switch is connected to the top of the surge arrester via a busbar. The left half of the neutral point protection gap bar is fixed to the busbar on which the surge arrester is installed, and the right half is fixed to the power transformer via a gap bar bracket. A power mechanism for driving the neutral point disconnect switch is installed on the T-shaped bracket. The online monitoring instrument is installed on the lower part of the T-shaped bracket.

[0004] The installation height of the transformer neutral point protection device is inconvenient to adjust according to the site conditions during installation and use, which makes the connection between the device and the transformer inconvenient and affects its use. Therefore, a transformer neutral point protection device is proposed to solve the above-mentioned problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a complete set of transformer neutral point protection devices, which has advantages such as easy height adjustment. It solves the problem that existing complete set of transformer neutral point protection devices are not easy to adjust the installation height according to site conditions, resulting in inconvenient connection between the device and the transformer and affecting its use.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a complete set of transformer neutral point protection device, including a base, a support tube disposed on the upper side of the base, and a mounting frame fixedly installed on the top of the support tube. A disconnecting switch, a surge arrester, and a current transformer are sequentially disposed on the upper side of the mounting frame. An adjustment component is disposed between the current transformer and the mounting frame, and a lifting mechanism is disposed between the support tube and the base.

[0007] The lifting mechanism includes a guide column and a protective box fixedly installed on the top of the base. The support tube is slidably sleeved on the upper side of the guide column. A drive motor is fixedly installed inside the protective box. A threaded cylinder extending from the upper part of the protective box is also provided inside the protective box. A main gear is fixedly installed on the output shaft of the drive motor. A driven gear that meshes with the main gear is fixedly connected to the outer wall of the threaded cylinder. A threaded rod is threadedly connected to the upper side of the threaded cylinder. A connecting plate connected to the support tube is fixedly installed at the upper end of the threaded rod.

[0008] Furthermore, the adjustment assembly includes a fixed frame fixedly installed at the bottom of the mounting bracket, an adjustment screw rotatably installed on the inner side of the fixed frame, a transmission nut threaded on the outer side of the adjustment screw, and a connecting block connected to the bottom of the current transformer fixedly installed on the top of the transmission nut.

[0009] Furthermore, a connecting shaft is fixedly installed on the upper side of the main gear, and the upper end of the connecting shaft is rotatably connected to the inner wall of the protective box.

[0010] Furthermore, the lower side of the threaded cylinder is rotatably connected to the base, and a first fixing member that is fixedly connected to the connecting plate is fixedly installed on the outer side of the support tube.

[0011] Furthermore, a second fixing member is fixedly installed on the outside of the support tube, and a control box is fixedly installed on the outside of the second fixing member.

[0012] Furthermore, a strip-shaped opening is provided on the inner side of the mounting bracket, the connecting block passes through the inner side of the strip-shaped opening, and a knob is fixedly connected to one end of the adjusting screw, the knob being located on the outer side of the mounting bracket.

[0013] Furthermore, a guide rail is fixedly installed on the inner side of the fixing frame, and the bottom of the transmission nut is slidably connected to the guide rail via a slider.

[0014] Compared with the prior art, this utility model provides a complete set of protection devices for the neutral point of a transformer, which has the following beneficial effects:

[0015] 1. This transformer neutral point protection device uses a drive motor to drive a main gear and a driven gear. The driven gear drives the threaded cylinder to rotate, which in turn drives the threaded rod to move up and down, thereby moving the connecting plate up and down and the support tube up and down along the outer wall of the guide column. This allows for adjustment of the mounting frame height, solving the problem that existing transformer neutral point protection devices are inconvenient to adjust the installation height according to site conditions, causing inconvenience in connecting the device to the transformer and affecting its use.

[0016] 2. The complete set of neutral point protection devices for this transformer adjusts the position of the current transformer by rotating the knob to drive the adjusting screw and the transmission nut, which in turn drives the connecting block to move, thereby adjusting the distance of the discharge gap between the surge arrester and the current transformer. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the protective box of this utility model;

[0019] Figure 3 This is a schematic diagram of the mounting bracket of this utility model;

[0020] Figure 4 This is a structural schematic diagram of the fixing frame of this utility model.

[0021] In the diagram: 1. Base; 2. Support tube; 3. Mounting bracket; 4. Disconnecting switch; 5. Surge arrester; 6. Current transformer; 7. Discharge gap; 8. Guide column; 9. Protective box; 10. Drive motor; 11. Threaded cylinder; 12. Main gear; 13. Connecting shaft; 14. Driven gear; 15. Threaded rod; 16. Connecting plate; 17. First fixing component; 18. Fixing bracket; 19. Adjusting screw; 20. Transmission nut; 21. Knob; 22. Connecting block; 23. Guide rail; 24. Strip opening; 25. Second fixing component; 26. Control box. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 4 A complete set of transformer neutral point protection device in this embodiment includes a base 1, a support pipe 2 set on the upper side of the base 1, and a mounting bracket 3 fixedly installed on the top of the support pipe 2. A disconnecting switch 4, a surge arrester 5, and a current transformer 6 are arranged sequentially on the upper side of the mounting bracket 3. A discharge gap 7 is provided between the surge arrester 5 and the current transformer 6.

[0024] In this embodiment, a lifting mechanism is provided between the support tube 2 and the base 1. The lifting mechanism includes a guide column 8 and a protective box 9 fixedly installed on the top of the base 1. The support tube 2 is slidably sleeved on the upper side of the guide column 8. A drive motor 10 is fixedly installed inside the protective box 9. A threaded cylinder 11 extending to the upper part of the protective box 9 is also provided inside the protective box 9. A main gear 12 is fixedly installed on the output shaft of the drive motor 10. A driven gear 14 that is engaged with the main gear 12 is fixedly connected to the outer wall of the threaded cylinder 11. A threaded rod 15 is threadedly connected to the upper side of the threaded cylinder 11. A connecting plate 16 connected to the support tube 2 is fixedly installed at the upper end of the threaded rod 15.

[0025] The main gear 12 is fixedly mounted with a connecting shaft 13 on its upper side. The upper end of the connecting shaft 13 is rotatably connected to the inner wall of the protective box 9. The lower side of the threaded cylinder 11 is rotatably connected to the base 1, facilitating the rotation of the threaded cylinder 11 and the main gear 12. A first fixing member 17, which is fixedly connected to the connecting plate 16, is fixedly mounted on the outer side of the support tube 2. A second fixing member 25 is fixedly mounted on the outer side of the support tube 2. A control box 26 is fixedly mounted on the outer side of the second fixing member 25. The main gear 12 is driven to rotate by the drive motor 10, which in turn drives the driven gear 14 to rotate. Under the transmission of the main gear 12 and the driven gear 14, the threaded cylinder 11 is driven to rotate. The threaded cylinder 11 then drives the threaded rod 15 to move up and down, thereby driving the connecting plate 16 to move up and down, and driving the support tube 2 to move up and down along the outer wall of the guide column 8, thus adjusting the height of the mounting frame 3.

[0026] In this embodiment, an adjustment assembly is provided between the current transformer 6 and the mounting bracket 3. The adjustment assembly includes a fixed bracket 18 fixedly installed at the bottom of the mounting bracket 3. An adjustment screw 19 is rotatably installed on the inner side of the fixed bracket 18. A transmission nut 20 is threaded on the outer side of the adjustment screw 19. A connecting block 22 connected to the bottom of the current transformer 6 is fixedly installed on the top of the transmission nut 20.

[0027] The mounting bracket 3 has a slot 24 on its inner side, through which a connecting block 22 passes, facilitating its movement. A knob 21 is fixedly connected to one end of the adjusting screw 19, located on the outer side of the mounting bracket 18, allowing for rotational adjustment of the screw 19. A guide rail 23 is fixedly mounted on the inner side of the mounting bracket 18, and the bottom of the transmission nut 20 is slidably connected to the guide rail 23 via a slider, guiding the transmission nut 20. Rotating the knob 21 rotates the adjusting screw 19, moving the transmission nut 20 and simultaneously moving the connecting block 22 along the inner side of the slot 24, thus adjusting the position of the current transformer 6 and facilitating the adjustment of the discharge gap 7 between the surge arrester 5 and the current transformer 6.

[0028] The working principle of the above embodiments is as follows:

[0029] In use, the drive motor 10 drives the main gear 12 and the driven gear 14 for transmission. The driven gear 14 can drive the threaded cylinder 11 to rotate, and the threaded cylinder 11 will drive the threaded rod 15 to move up and down, thereby driving the connecting plate 16 to move up and down, and driving the support tube 2 to move up and down along the outer wall of the guide column 8, so as to adjust the height of the mounting bracket 3.

[0030] By rotating the knob 21, the adjusting screw 19 and the transmission nut 20 are driven to move, thereby adjusting the position of the current transformer 6 and thus adjusting the distance of the discharge gap 7 between the surge arrester 5 and the current transformer 6.

[0031] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.

[0032] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to 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.

Claims

1. A complete set of protection devices for the neutral point of a transformer, characterized in that: It includes a base (1), a support tube (2) set on the upper side of the base (1) and a mounting bracket (3) fixedly installed on the top of the support tube (2). A disconnecting switch (4), a surge arrester (5) and a current transformer (6) are arranged sequentially on the upper side of the mounting bracket (3). An adjustment component is provided between the current transformer (6) and the mounting bracket (3). A lifting mechanism is provided between the support tube (2) and the base (1). The lifting mechanism includes a guide column (8) and a protective box (9) fixedly installed on the top of the base (1). The support tube (2) is slidably sleeved on the upper side of the guide column (8). A drive motor (10) is fixedly installed inside the protective box (9). A threaded cylinder (11) extending to its upper part is also provided inside the protective box (9). A main gear (12) is fixedly installed on the output shaft of the drive motor (10). A driven gear (14) that meshes with the main gear (12) is fixedly connected to the outer wall of the threaded cylinder (11). A threaded rod (15) is threadedly connected to the upper side of the threaded cylinder (11). A connecting plate (16) connected to the support tube (2) is fixedly installed at the upper end of the threaded rod (15).

2. The transformer neutral point protection device according to claim 1, characterized in that: The adjustment assembly includes a fixed frame (18) fixedly installed at the bottom of the mounting bracket (3), an adjustment screw (19) is rotatably installed on the inner side of the fixed frame (18), a transmission nut (20) is threaded on the outer side of the adjustment screw (19), and a connecting block (22) connected to the bottom of the current transformer (6) is fixedly installed on the top of the transmission nut (20).

3. The transformer neutral point protection device according to claim 1, characterized in that: A connecting shaft (13) is fixedly installed on the upper side of the main gear (12), and the upper end of the connecting shaft (13) is rotatably connected to the inner wall of the protective box (9).

4. A complete set of protection devices for the neutral point of a transformer according to claim 1, characterized in that: The lower side of the threaded cylinder (11) is rotatably connected to the base (1), and the outer side of the support tube (2) is fixedly installed with a first fixing member (17) that is fixedly connected to the connecting plate (16).

5. A complete set of protection devices for the neutral point of a transformer according to claim 1, characterized in that: A second fixing member (25) is fixedly installed on the outside of the support tube (2), and a control box (26) is fixedly installed on the outside of the second fixing member (25).

6. A complete set of protection devices for the neutral point of a transformer according to claim 2, characterized in that: The mounting bracket (3) has a slot (24) on its inner side. The connecting block (22) passes through the inner side of the slot (24). One end of the adjusting screw (19) is fixedly connected to a knob (21), which is located on the outer side of the mounting bracket (18).

7. A complete set of protection devices for transformer neutral point according to claim 2, characterized in that: The inner side of the fixed frame (18) is fixedly installed with a guide rail (23), and the bottom of the transmission nut (20) is slidably connected to the guide rail (23) through a slider.

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