Transformer neutral point sphere gap adjusting device
Through the design of the slide rail and adjustment screw assembly, combined with the drive screw and the intermediate slide, the accurate adjustment of the neutral penalty gap of the transformer is achieved, solving the problem of insufficient adjustment accuracy in the prior art, and improving the accuracy of the discharge voltage and the reliability of the device.
Patent Information
- Application Number
- CN202422122712.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-08-29
AI Technical Summary
In the prior art, the adjustment accuracy of the neutral penalty gap adjustment device of the transformer is insufficient, which affects the accuracy of the discharge voltage.
The slide rail and adjustment screw assembly are adopted, combined with the design of the drive screw and the intermediate slider, and the rough adjustment and precise adjustment of the discharge ball gap is achieved by adjusting the rotation of the screw and the slippage of the drive screw, and the adjustment accuracy is improved by using the ruler and limit slider.
The precise adjustment of the discharge ball gap is achieved, and the adjustment accuracy reaches ±0.1mm, which improves the adjustment accuracy and reliability of the ball gap, and facilitates the disassembly and assembly of the device and the replacement of parts.
Smart Images
Figure CN223193633U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of neutral point equipment of high-voltage power transformers, in particular to a transformer neutral point ball gap adjustment device. Background Art
[0002] Ball gap adjustment plays a crucial role in the commissioning of transformer neutral point protection. The neutral point is a power transformer protection device comprised of a lightning arrester, a grounding switch, and a current transformer with a ball gap discharge. By adjusting the electrode spacing of the ball gap switch, the trigger gap, the trigger pin diameter, and the position of the trigger pin relative to the lower hemisphere electrode surface can be flexibly adjusted, enabling flexible adjustment of the transformer neutral point protection.
[0003] In the prior art, a transformer neutral point ball gap adjustment device is usually used. This device is used in sulfur hexafluoride gas insulated metal-enclosed high-voltage equipment to adjust the discharge ball gap distance of the current transformer. During installation and power frequency withstand voltage testing, the gap is required to be adjusted to the maximum (80mm). During normal operation, the gap is adjusted (4mm to 10mm) according to the discharge voltage requirements. For this operating condition, the conventional adjustment methods are currently screw adjustment, ball screw, gear rack, etc.
[0004] However, in actual application, it was found that the gap adjustment accuracy through the conventional adjustment method can only reach ±0.5mm, and the gap adjustment accuracy will affect the accuracy of the discharge voltage. Utility Model Content
[0005] In order to improve the adjustment accuracy of the ball gap, the present application provides a transformer neutral point ball gap adjustment device.
[0006] The present application provides a transformer neutral point ball gap adjustment device, which adopts the following technical solution:
[0007] A transformer neutral point ball gap adjustment device is used to adjust the discharge ball gap, including a slide rail, an adjustment slider is slidably connected to the slide rail, the adjustment slider slides along the thickness direction of the slide rail, the slide rail is provided with an adjustment slot for the adjustment slider to slide, the adjustment slider is threadedly connected to the adjustment screw, the end of the adjustment screw is connected to the discharge ball, and when the adjustment screw rotates, the discharge ball is driven to slide along the thickness direction of the slide rail, and the slide rail is provided with a control component for controlling the sliding length of the adjustment slider.
[0008] By adopting the above technical solution, when the adjusting screw rotates, it can drive the discharge ball to slide along the thickness direction of the slide rail, so that the position of the discharge ball can be roughly adjusted. By adjusting the sliding length of the adjusting slider in the thickness direction of the slide rail through the control component, the position of the discharge ball can be accurately adjusted, thereby effectively improving the adjustment accuracy of the ball gap.
[0009] Preferably, the control component includes an intermediate slider slidingly arranged on the slide rail, the intermediate slider slides along the length direction of the slide rail, the slide rail is provided with a slide groove for the intermediate slider to slide, the end wall of the adjustment slider facing the intermediate slider is provided with a connecting shaft, the intermediate slider is provided with an inclined adjustment through hole, the end of the connecting shaft away from the adjustment slider passes through the adjustment through hole, the side wall of the connecting shaft is in contact with the inner wall of the adjustment through hole, and the slide rail is provided with a control part for controlling the sliding length of the intermediate slider.
[0010] Preferably, the control member includes a driving screw rotatably connected to the slide rail, and the intermediate sliding block is provided with a driving threaded hole that is threadably matched with the driving screw.
[0011] By adopting the above technical solution, with the cooperation of the connecting shaft and the adjusting through hole, when the intermediate slider slides under the action of the driving screw, it can drive the adjusting slider to slide along the thickness direction of the slide rail, which is convenient for controlling the sliding length of the intermediate slider, and the thread has a self-locking function. The intermediate slider is not easy to slide relative to the slide rail when there is no other external force, which improves the reliability of the intermediate slider driven by the driving screw to slide, and to a certain extent ensures the accuracy of fine-tuning the gap of the discharge ball through the sliding of the intermediate slider.
[0012] Preferably, the slide rail includes a sliding portion and a fixed portion, the fixed portion is fixed to the sliding portion by a bolt, the slide groove is located on the sliding portion, the driving screw includes a shaft portion, a threaded portion and a limiting portion are coaxially provided on the shaft portion, an annular groove is provided at the end of the shaft portion, an engaging through hole is provided on the sliding portion for the end of the shaft portion to be engaged, the inner diameter of the engaging through hole is matched with the inner diameter of the annular groove, a fixing through hole is provided on the fixing portion for the shaft portion to pass through, the limiting portion is located on the side of the threaded portion away from the annular groove, and the end of the limiting portion away from the threaded portion is matched with the fixing portion.
[0013] By adopting the above technical solution, the sliding part and the fixed part are fixed by bolts, which facilitates the disassembly of the middle slider, thereby facilitating the disassembly and assembly of the transformer neutral point ball gap adjustment device, and the damaged parts can be easily replaced. The annular groove cooperates with the interlocking through hole, making it difficult for the drive screw to slide in the direction away from the fixed part. The limiting part cooperates with the fixed through hole, making it difficult for the entire drive screw to slide toward the fixed part, thereby facilitating the fixing screw to be fixed on the slide rail.
[0014] Preferably, it also includes a limit slider slidingly arranged on the slide rail, the limit slider is penetrated by a limit through hole for the connecting shaft to pass through, the end of the connecting shaft away from the adjusting slider is threadedly connected to the limit screw, and the screw head of the limit screw is in contact with the end face of the limit slider away from the adjusting slider.
[0015] By adopting the above technical solution, the setting of the limit slider provides support for the end of the connecting shaft away from the adjusting slider, thereby improving the stability of the connecting shaft driving the adjusting slider to slide under the action of the middle slider. The setting of the limit screw makes it difficult for the limit slider to separate from the connecting shaft, and further makes it difficult for the adjusting slider and the limit slider to slip along the length direction of the connecting shaft.
[0016] Preferably, a scale is provided on the slide rail, and the middle slider can slide to be flush with the zero scale line on the scale.
[0017] By adopting the above technical solution and setting a scale, it is easy to control the sliding length of the middle slider, thereby effectively improving the adjustment accuracy of the ball gap.
[0018] Preferably, a locking nut is provided on the adjusting slider, and the locking nut is used to lock the rotation of the adjusting screw.
[0019] By adopting the above technical solution and setting the locking nut, the adjusting screw is not easy to slip relative to the adjusting slider without the action of other external forces, thereby improving the accuracy of adjusting the ball gap through the adjusting screw.
[0020] In summary, this application includes at least one of the following beneficial technical effects:
[0021] 1. The ball gap can be roughly adjusted by rotating the adjusting screw, and then the middle slider can be driven to slide by rotating the driving screw, and the ball gap can be accurately adjusted with the cooperation of the connecting shaft and the adjusting through hole, which effectively improves the adjustment accuracy of the ball gap;
[0022] 2. By setting the scale, it is easy to control the sliding length of the middle slider, further improving the adjustment accuracy of the ball gap. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.
[0024] Figure 2 It is a schematic diagram of the overall structure from another perspective in the embodiment of the present application.
[0025] Figure 3 It is a schematic diagram of the explosion in the embodiment of the present application.
[0026] Explanation of the accompanying drawings: 1. Slide rail; 12. Scale; 13. Sliding portion; 131. Fitting through hole; 14. Fixing portion; 141. Fixing through hole; 2. Adjusting slider; 21. Adjusting slot; 22. Adjusting screw; 23. Locking nut; 24. Connecting shaft; 3. Intermediate slider; 31. Adjusting through hole; 32. Slide slot; 33. Driving threaded hole; 4. Limiting slider; 41. Limiting slot; 42. Limiting through hole; 43. Limiting screw; 5. Driving screw; 51. Shaft body; 52. Limiting portion; 53. Threaded portion; 54. Ring groove. DETAILED DESCRIPTION
[0027] The following is combined with Figure 1-3 The utility model is described in further detail.
[0028] The embodiment of the present application discloses a transformer neutral point ball gap adjustment device for adjusting the gap of the discharge ball. Figure 1 and Figure 2 , including a slide rail 1, an adjusting slider 2 is slidably connected to the slide rail 1, and the adjusting slider 2 slides along the thickness direction of the slide rail 1. The adjusting slider 2 is L-shaped and an adjusting slot 21 for the adjusting slider 2 to slide is provided on the slide rail 1. An adjusting screw 22 is threadedly connected to the adjusting slider 2, and the discharge ball is fixed to the end of the adjusting screw 22. When the adjusting screw 22 rotates, it can drive the discharge ball to slide along the thickness direction of the slide rail 1, so that the position of the discharge ball can be roughly adjusted. In the embodiment of the present application, the gap of the discharge ball can be adjusted to a maximum of about 80 mm under the action of the adjusting screw 22; a control component for controlling the sliding length of the adjusting slider 2 is provided on the slide rail 1. By adjusting the sliding length of the adjusting slider 2 in the thickness direction of the slide rail 1 through the control component, the position of the discharge ball can be accurately adjusted, effectively improving the adjustment accuracy of the ball gap.
[0029] Reference Figure 1 and Figure 2 A locking nut 23 is provided on the adjusting slider 2, and the locking nut 23 is used to lock the rotation of the adjusting screw 22, so that the adjusting screw 22 is not easy to slip relative to the adjusting slider 2 without the action of other external forces, thereby improving the accuracy of adjusting the ball gap by the adjusting screw 22.
[0030] Reference Figure 2 and Figure 3The control component includes an intermediate slider 3 slidably arranged on the slide rail 1, and the intermediate slider 3 slides along the length direction of the slide rail 1. The slide rail 1 is provided with a slide groove 32 for the intermediate slider 3 to slide, so that the intermediate slider 3 fits in with the inner wall of the slide groove 32, effectively reducing the shaking of the intermediate slider 3 during the sliding process, and can provide guidance for the sliding of the intermediate slider 3 through the setting of the slide groove 32; a connecting shaft 24 is fixed to the adjusting slider 2 by a threaded connection, and an adjusting through hole 31 is provided on the intermediate slider 3, and the end of the connecting shaft 24 away from the adjusting slider 2 passes through the adjusting through hole 31 and the side wall of the connecting shaft 24 fits in with the inner wall of the adjusting through hole 31. Through the sliding of the intermediate slider 3, the adjusting slider 2 can be driven to slide in the thickness direction of the slide rail 1 under the action of the connecting shaft 24 and the adjusting through hole 31 on the intermediate slider 3.
[0031] Reference Figure 2 and Figure 3 The slide rail 1 is also slidably connected to a limit slider 4, and the limit slider 4 and the adjusting slider 2 are symmetrically arranged on both sides of the middle slider 3. A limit slot 41 for the limit slider 4 to slide is provided on the slide rail 1; a limit through hole 42 for the connecting shaft 24 to pass through is provided on the limit slider 4, and one end of the connecting shaft 24 away from the adjusting slider 2 is threadedly connected to a limit screw 43, and the screw head of the limit screw 43 is in contact with the end face of the limit slider 4 away from the adjusting slider 2. By setting the limit slider 4, the connection The shaft 24 provides support at one end away from the adjusting slider 2, thereby improving the stability of the connecting shaft 24 in driving the adjusting slider 2 to slide under the action of the intermediate slider 3. Through the setting of the limiting screw 43, the limiting slider 4 is not easy to separate from the connecting shaft 24, and thus the adjusting slider 2 and the limiting slider 4 are not easy to slip along the length direction of the connecting shaft 24. The limiting slider 4 and the adjusting slider 2 are both fitted with the intermediate slider 3. By rotating the connecting shaft 24, the distance between the intermediate slider 3 and the adjusting slider 2 can be adjusted.
[0032] Reference Figure 1 and Figure 3 The slide rail 1 is provided with a control part for controlling the sliding length of the intermediate slider 3, and the control part includes a driving screw 5 rotatably connected to the slide rail 1, and the intermediate slider 3 is provided with a driving threaded hole 33 threadedly matched with the driving screw 5. Since the intermediate slider 3 is in contact with the inner wall of the slide groove 32, the intermediate slider 3 can slide relative to the slide rail 1 under the action of the thread transmission through the rotation of the driving screw 5, and the thread has a self-locking function. The intermediate slider 3 is not easy to slide relative to the slide rail 1 when there is no other external force. The reliability of the sliding of the intermediate slider 3 by the driving screw 5 is improved, and the accuracy of fine-tuning the gap of the discharge ball by the sliding of the intermediate slider 3 is guaranteed to a certain extent.
[0033] Reference Figure 2 and Figure 3 The slide rail 1 is provided with a scale 12, located on one side of the lower end of the adjustment hole 31. The intermediate slider 3 can slide until it is flush with the zero scale line on the scale 12. The scale 12 facilitates the control of the sliding distance of the intermediate slider 3. The inclination angle of the adjustment hole 31 is limited so that when the intermediate slider 3 moves horizontally by 5mm, the connecting shaft 24 can drive the adjustment slider 2 and the adjustment screw 22 located on the adjustment slider 2 to slide 1mm along the thickness direction of the slide rail 1. With the cooperation of the adjustment screw 22 and the drive screw 5, the adjustment accuracy of the ball gap reaches ±0.1mm, effectively improving the adjustment accuracy of the ball gap.
[0034] Reference Figure 1 and Figure 3 The slide rail 1 includes a sliding portion 13 and a fixed portion 14. The fixed portion 14 is fixed to the sliding portion 13 by a bolt. The slide groove 32 is located on the sliding portion 13. The drive screw 5 includes a shaft portion 51. The shaft portion 51 is coaxially provided with a threaded portion 53 and a limiting portion 52. An annular groove 54 is provided at the end of the shaft portion 51. A fitting through hole 131 for fitting the end of the shaft portion 51 is provided on the sliding portion 13. The inner diameter of the fitting through hole 131 is fitted with the inner diameter of the annular groove 54. A fixing through hole 141 is provided on the fixed portion 14 for the shaft portion 51 to pass through. The limiting portion 52 is located away from the threaded portion 53. On the side away from the annular groove 54, the end of the limiting portion 52 away from the threaded portion 53 is in contact with the fixing portion 14; the sliding portion 13 and the fixing portion 14 are fixed by bolts, which facilitates the disassembly of the intermediate slider 3, thereby facilitating the disassembly and assembly of the transformer neutral point ball gap adjustment device, and can conveniently replace damaged parts. The annular groove 54 cooperates with the interlocking through hole 131, so that the driving screw 5 is not easy to slide in the direction away from the fixing portion 14, and the limiting portion 52 cooperates with the fixing through hole 141, so that the driving screw 5 as a whole is not easy to slide toward the fixing portion 14, thereby facilitating the fixing screw to be fixed on the slide rail 1.
[0035] The implementation principle of a transformer neutral point ball gap adjustment device in an embodiment of the present application is as follows: when the transformer neutral point equipment is installed and subjected to the power frequency withstand voltage test, the gap of the discharge ball is directly adjusted by adjusting the screw 22 to the maximum of about 80 mm; when adjusting the discharge ball gap according to the discharge voltage requirement, the adjustment range is generally between 4 mm and 10 mm, and can be adjusted by driving the screw 5. First, the driving screw 5 is rotated until the edge of the middle slider 3 is flush with the zero scale of the ruler 12, and then the adjusting screw 22 is rotated for coarse adjustment, so that the two discharge ball heads just touch each other, and then the adjusting screw 22 is locked by the locking nut 23, and finally the driving screw 5 is rotated for fine adjustment to further adjust the ball gap.
[0036] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A transformer neutral point ball gap adjustment device for adjusting the discharge ball gap, characterized in that: The invention comprises a slide rail (1), an adjusting slider (2) being slidably connected to the slide rail (1), the adjusting slider (2) sliding along the thickness direction of the slide rail (1), an adjusting slot (21) for the adjusting slider (2) to slide, an adjusting screw (22) being threadedly connected to the adjusting slider (2), the end of the adjusting screw (22) being connected to a discharge ball, the adjusting screw (22) driving the discharge ball to slide along the thickness direction of the slide rail (1) when rotating, and a control component for controlling the sliding length of the adjusting slider (2) being provided on the slide rail (1).
2. The transformer neutral point ball gap adjustment device according to claim 1, characterized in that: The control component includes an intermediate slider (3) slidably arranged on the slide rail (1), the intermediate slider (3) slides along the length direction of the slide rail (1), the slide rail (1) is provided with a slide groove (32) for the intermediate slider (3) to slide, the end wall of the adjustment slider (2) facing the intermediate slider (3) is provided with a connecting shaft (24), the intermediate slider (3) is provided with an adjustment through hole (31) arranged in an inclined manner, the end of the connecting shaft (24) away from the adjustment slider (2) passes through the adjustment through hole (31), the side wall of the connecting shaft (24) is in contact with the inner wall of the adjustment through hole (31), and the slide rail (1) is provided with a control member for controlling the sliding length of the intermediate slider (3).
3. The transformer neutral point ball gap adjustment device according to claim 2, characterized in that: The control component comprises a driving screw rod (5) rotatably connected to the slide rail (1), and the intermediate slider (3) is provided with a driving threaded hole (33) threadably matched with the driving screw rod (5).
4. The transformer neutral point spherical gap adjustment device according to claim 3, characterized in that: The slide rail (1) includes a sliding portion (13) and a fixed portion (14), wherein the fixed portion (14) is fixed to the sliding portion (13) by a bolt, and the slide groove (32) is located on the sliding portion (13). The driving screw (5) includes a shaft portion (51), wherein a threaded portion (53) and a limiting portion (52) are coaxially provided on the shaft portion (51), and an annular groove (54) is provided at the end of the shaft portion (51). A through hole (131) is provided for the end of the shaft body (51) to be engaged, and the inner diameter of the through hole (131) is in contact with the inner diameter of the annular groove (54). A through hole (141) is provided on the fixing portion (14) for the shaft body (51) to pass through. The limiting portion (52) is located on a side of the threaded portion (53) away from the annular groove (54), and one end of the limiting portion (52) away from the threaded portion (53) is in contact with the fixing portion (14).
5. The transformer neutral point spherical gap adjustment device according to claim 1, characterized in that: The invention also includes a limiting slider (4) slidably arranged on the slide rail (1), wherein a limiting through hole (42) for the connecting shaft (24) to pass through is provided on the limiting slider (4), and one end of the connecting shaft (24) away from the adjusting slider (2) is threadedly connected to a limiting screw (43), and the screw head of the limiting screw (43) is in contact with the end face of the limiting slider (4) away from the adjusting slider (2).
6. The transformer neutral point ball gap adjustment device according to claim 2, characterized in that: A scale (12) is provided on the slide rail (1), and the middle slider (3) can slide to be flush with the zero scale line on the scale (12).
7. The transformer neutral point spherical gap adjustment device according to claim 1, characterized in that: The adjusting slide block (2) is provided with a locking nut (23), and the locking nut (23) is used to lock the rotation of the adjusting screw (22).