Anti-interference telescopic voltage transformer

Abstract

The application relates to the technical field of electronic components, and discloses an anti-interference telescopic voltage transformer, which comprises an adjusting sleeve, a low-voltage capacitor voltage divider installed at the bottom of the adjusting sleeve and a high-voltage capacitor voltage divider arranged above the adjusting sleeve, and an adjusting tube is slidably inserted into the adjusting sleeve. The anti-interference telescopic voltage transformer is provided with a silicon rubber corrugated sleeve, which has excellent high-temperature resistance, corrosion resistance and elastic recovery performance, can form reliable sealing between the high-voltage capacitor voltage divider and the adjusting sleeve, does not interfere with the adjusting work of the high-voltage capacitor voltage divider, can block water, dust and foreign matters from entering the inside of the adjusting sleeve, and can avoid that impurities are stuck in the adjusting tube.

Description

Technical Field

[0001] This application relates to the field of electronic component technology, specifically to an anti-interference type retractable voltage transformer. Background Technology

[0002] A capacitive voltage transformer is a voltage transformer that uses a series capacitor to extract voltage, which is then transformed by a transformer to serve as a voltage source for meters, relay protection devices, etc.

[0003] An existing patent (publication number: CN218037019U) discloses an anti-interference telescopic voltage transformer, which includes a base tube, a low-voltage capacitive voltage divider disposed at one end of the base tube, and a telescopic tube inserted into the base tube from the other end and telescopically cooperating with it. A high-voltage capacitive voltage divider is disposed at the end of the telescopic tube outside the base tube. A drive assembly for driving the telescopic tube to extend and retract is provided between the base tube and the telescopic tube. The side wall of the base tube has symmetrically opened mounting openings about its axis. The drive assembly includes a pull wire, gears rotatably connected in the mounting openings, and a rack disposed on the outer side wall of the telescopic tube. Each gear has a circumferentially opened winding groove. One end of the pull wire is wound in the winding groove of one gear, and the other end is wound in the winding groove of the other gear. This application has the advantage of reducing the possibility of external magnetic field interference affecting the measurement accuracy of the voltage transformer.

[0004] The aforementioned transformer uses a telescopic tube to raise and lower the high-voltage capacitive divider, reducing the possibility of external magnetic fields affecting the measurement accuracy of the voltage transformer. However, after adjustment, external impurities and foreign objects can easily enter through the gap between the high-voltage capacitive divider and the bottom tube, becoming trapped between the high-voltage and low-voltage capacitive dividers, affecting the reset of the high-voltage capacitive divider. Secondly, the telescopic tube is locked by winding a pull wire around a gear, but the pull wire is prone to tension slackening due to fatigue or environmental factors (such as temperature changes) during long-term use, reducing the reliability of the lock. Furthermore, when the lock is released, the high-voltage capacitive divider and the telescopic tube may fall rapidly under gravity, which may not only cause collision damage to the bottom of the equipment but also deform or damage the drive components (such as gears and racks) due to inertial impact, posing a safety hazard. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides an anti-interference telescopic voltage transformer, which has advantages such as stable regulation and high sealing performance, thus solving the problems mentioned in the background technology.

[0006] To achieve the above objectives, this application provides the following technical solution: an anti-interference telescopic voltage transformer, comprising an adjustment sleeve, a low-voltage capacitor divider installed at the bottom of the adjustment sleeve, and a high-voltage capacitor divider installed above the adjustment sleeve, wherein the adjustment sleeve is slidably connected to an adjustment tube.

[0007] The outer surface of the adjusting sleeve is provided with a self-locking drive component, which is used to adjust the distance between the high-voltage capacitor divider and the low-voltage capacitor divider.

[0008] The top end of the regulating tube is fixedly connected to the high-voltage capacitor divider, and a corrugated sleeve is installed between the bottom end of the high-voltage capacitor divider and the top end of the regulating sleeve.

[0009] Furthermore, the corrugated sleeve is made of silicone rubber.

[0010] Through the above solution, silicone rubber has excellent high temperature resistance, corrosion resistance and elastic recovery properties. It can maintain its sealing performance for a long time in an environment of -60℃ to 250℃, effectively preventing moisture, dust and foreign objects from entering the inside of the regulating sleeve and avoiding the regulating tube from getting stuck due to impurities.

[0011] Furthermore, the self-locking drive assembly includes a toothed plate and a drive housing. The drive housing is fixedly connected to the middle end of the adjusting sleeve, and the axis of the drive housing is perpendicular to the axis of the adjusting sleeve. The toothed plate is fixedly connected to the adjusting tube, and the toothed plate and the adjusting tube are arranged parallel to each other. A drive shaft is rotatably connected between the two ends of the drive housing, and a gear is fixedly connected to the middle end of the drive shaft. The gear meshes with the toothed plate.

[0012] Through the above scheme, the meshing transmission between the gear and the toothed plate can achieve precise control of the lifting and lowering of the regulating tube. The transmission ratio is fixed and there is no slippage error, ensuring the accuracy of the position adjustment of the high-voltage capacitor voltage divider.

[0013] Furthermore, the self-locking drive assembly also includes a worm gear, which is fixedly connected to one end of the drive shaft. A worm is rotatably connected between the inner top wall and the inner bottom wall of the drive housing, and the worm meshes with the worm gear.

[0014] With the above solution, the worm gear transmission has a self-locking characteristic. When the worm stops rotating, the worm wheel cannot drive the worm to rotate in the opposite direction, thereby locking the position of the regulating tube and preventing the high-voltage capacitor divider from sliding down due to gravity, which significantly improves the self-locking reliability.

[0015] Furthermore, a handle is fixedly connected to one end of the worm gear.

[0016] The above solution allows for manual adjustment of the worm gear rotation by rotating the handle, thereby controlling the lifting and lowering speed of the regulating tube. This method is labor-saving and enables stepless speed regulation, avoiding impact damage caused by the rapid descent of the high-voltage capacitor divider.

[0017] Furthermore, the inner wall of the adjusting sleeve is provided with a set of guide grooves arranged along the length of the adjusting sleeve, and the outer surface of the adjusting tube is provided with a set of guide blocks, each guide block being slidably connected to its adjacent guide groove.

[0018] The above solution restricts the rotational freedom of the regulating tube by matching the guide groove and the guide block, ensuring that it slides only along the axial direction, reducing frictional loss, improving the smoothness of adjustment, and extending the service life of the equipment.

[0019] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0020] This anti-interference telescopic voltage transformer, through the setting of silicone rubber corrugated sleeve, utilizes its excellent high temperature resistance, corrosion resistance and elastic recovery performance to form a reliable seal between the high voltage capacitor divider and the regulating sleeve, while not interfering with the regulating operation of the high voltage capacitor divider, effectively preventing moisture, dust and foreign objects from entering the interior of the regulating sleeve, and avoiding impurities from jamming the regulating tube.

[0021] By combining gear and toothed plate meshing transmission with worm gear self-locking structure, the precise adjustment and reliable locking of the high-voltage capacitor divider position are achieved. The self-locking characteristic of the worm gear automatically locks the position of the adjusting tube when the worm stops rotating, preventing the high-voltage capacitor divider from sliding down due to gravity, which significantly improves the self-locking reliability and avoids the problem of easy loosening and failure of the pull wire locking in the existing technology. Attached Figure Description

[0022] Figure 1 This is a front view of the overall structure of this application;

[0023] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this application;

[0024] Figure 3 This is a sectional view of the overall structure of this application from the front.

[0025] Figure 4 This is a sectional view of the overall structure of this application from top view;

[0026] Figure 5 This is a structural diagram of the self-locking drive component of this application.

[0027] In the picture:

[0028] 1. Adjusting sleeve; 101. Guide groove; 2. Low-voltage capacitor divider; 3. High-voltage capacitor divider; 4. Adjusting tube; 401. Guide block;

[0029] 5. Self-locking drive assembly; 501. Gear plate; 502. Drive housing; 503. Drive shaft; 504. Gear; 505. Worm gear; 506. Worm; 507. Handle;

[0030] 6. Corrugated sleeve. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figures 1-5 An anti-interference telescopic voltage transformer in this embodiment includes an adjusting sleeve 1, a low-voltage capacitor divider 2 installed at the bottom of the adjusting sleeve 1, and a high-voltage capacitor divider 3 installed above the adjusting sleeve 1. An adjusting tube 4 is slidably inserted into the adjusting sleeve 1. A set of guide grooves 101 arranged along the length of the adjusting sleeve 1 are opened on the inner wall of the adjusting sleeve 1. A set of guide blocks 401 are arranged on the outer surface of the adjusting tube 4. Each guide block 401 is slidably connected to its adjacent guide groove 101. The cooperation between the guide groove 101 and the guide block 401 can restrict the rotational freedom of the adjusting tube 4, ensuring that it slides only along the axial direction, reducing frictional loss and improving the smoothness of adjustment, and extending the service life of the equipment.

[0033] A self-locking drive assembly 5 is provided on the outer surface of the adjusting sleeve 1 for adjusting the distance between the high-voltage capacitor divider 3 and the low-voltage capacitor divider 2. The self-locking drive assembly 5 includes a toothed plate 501 and a drive housing 502. The drive housing 502 is fixedly connected to the middle end of the adjusting sleeve 1, and the axis of the drive housing 502 is perpendicular to the axis of the adjusting sleeve 1. The toothed plate 501 is fixedly connected to the adjusting tube 4 and is arranged parallel to the adjusting tube 4. A drive shaft 503 is rotatably connected between the two ends of the drive housing 502. A gear 504 is fixedly connected to the middle end of the drive shaft 503. The gear 504 meshes with the toothed plate 501. Through the above arrangement, the meshing transmission between the gear 504 and the toothed plate 501 can realize precise control of the lifting and lowering of the adjusting tube 4. The transmission ratio is fixed and there is no slippage error, ensuring the position adjustment of the high-voltage capacitor divider 3. To ensure accuracy, the self-locking drive assembly 5 also includes a worm gear 505, which is fixedly connected to one end of the drive shaft 503. A worm 506 is rotatably connected between the inner top wall and the inner bottom wall of the drive housing 502. The worm 506 meshes with the worm gear 505. The worm gear 505 and worm 506 transmission has a self-locking characteristic. When the worm 506 stops rotating, the worm gear 505 cannot drive the worm 506 to rotate in the opposite direction, thereby locking the position of the regulating tube 4 and preventing the high-voltage capacitor divider 3 from sliding down due to gravity, significantly improving the self-locking reliability. A handle 507 is fixedly connected to one end of the worm 506. Rotating the handle 507 can manually adjust the rotation of the worm 506, thereby controlling the lifting and lowering speed of the regulating tube 4. The operation is labor-saving and can achieve stepless speed regulation, avoiding impact damage caused by the rapid fall of the high-voltage capacitor divider 3.

[0034] The top end of the regulating tube 4 is fixedly connected to the high-voltage capacitor divider 3. A corrugated sleeve 6 is installed between the bottom end of the high-voltage capacitor divider 3 and the top end of the regulating sleeve 1 to improve the sealing between the high-voltage capacitor divider 3 and the regulating sleeve 1 and prevent impurities from entering the interior of the regulating sleeve 1. The corrugated sleeve 6 is made of silicone rubber, which has excellent high temperature resistance, corrosion resistance and elastic recovery properties. It can maintain its sealing performance for a long time in an environment of -60℃ to 250℃, effectively blocking moisture, dust and foreign objects from entering the interior of the regulating sleeve 1 and preventing the regulating tube 4 from getting stuck due to impurities.

[0035] The working principle of the above embodiment is as follows: the high voltage capacitor divider 3 and the top of the adjusting sleeve 1 are connected by a silicone rubber corrugated sleeve 6. The corrugated sleeve 6 is in a contracted state in its natural state. The elastic recovery performance of silicone rubber makes it always fit the surface during the raising and lowering of the adjusting tube 4, forming a dynamic sealing layer, which effectively prevents external moisture, dust and foreign objects from entering the interior of the adjusting sleeve 1 and avoids impurities from jamming the adjusting tube 4. When it is necessary to adjust the distance between the high voltage capacitor divider 3 and the low voltage capacitor divider 2, the operator rotates the handle 507 to drive the worm gear 506 to rotate. The meshing transmission between the worm 506 and the worm wheel 505 transmits the rotational torque to the drive shaft 503. The drive shaft 503 drives the gear 504 to rotate synchronously. Since the gear 504 and the toothed plate 501 are in a fixed meshing relationship, the rotational motion of the gear 504 is converted into the linear lifting motion of the toothed plate 501, which in turn drives the adjusting tube 4 to slide along the axis of the adjusting sleeve 1. When the target position is reached, the handle 507 is stopped from rotating. At this time, the worm 506 stops rotating. Due to the self-locking characteristic of the helix angle of the worm 506, the worm wheel 505 cannot drive the worm 506 to rotate in the opposite direction. The drive shaft 503 and the gear 504 are locked. During the lifting and lowering process of the adjusting tube 4, the guide block 401 on its outer wall slides along the guide groove 101 on the inner wall of the adjusting sleeve 1, eliminating the possibility of rotational deviation.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-interference telescopic voltage transformer, comprising an adjusting sleeve (1), a low-voltage capacitor divider (2) mounted at the bottom of the adjusting sleeve (1), and a high-voltage capacitor divider (3) disposed above the adjusting sleeve (1), characterized in that: The adjusting sleeve (1) is slidably connected to the adjusting tube (4); The outer surface of the adjusting sleeve (1) is provided with a self-locking drive assembly (5) for adjusting the distance between the high voltage capacitor divider (3) and the low voltage capacitor divider (2); The top end of the regulating tube (4) is fixedly connected to the high voltage capacitor divider (3), and a corrugated sleeve (6) is installed between the bottom end of the high voltage capacitor divider (3) and the top end of the regulating sleeve (1).

2. The anti-interference type telescopic voltage transformer according to claim 1, characterized in that: The corrugated sleeve (6) is made of silicone rubber.

3. The anti-interference type telescopic voltage transformer according to claim 1, characterized in that: The self-locking drive assembly (5) includes a toothed plate (501) and a drive housing (502). The drive housing (502) is fixedly connected to the middle end of the adjusting sleeve (1), and the axis of the drive housing (502) is perpendicular to the axis of the adjusting sleeve (1). The toothed plate (501) is fixedly connected to the adjusting tube (4), and the toothed plate (501) and the adjusting tube (4) are arranged in parallel. A drive shaft (503) is rotatably connected between the two ends of the drive housing (502). A gear (504) is fixedly connected to the middle end of the drive shaft (503), and the gear (504) meshes with the toothed plate (501).

4. The anti-interference type telescopic voltage transformer according to claim 3, characterized in that: The self-locking drive assembly (5) also includes a worm gear (505), which is fixedly connected to one end of the drive shaft (503). A worm (506) is rotatably connected between the inner top wall and the inner bottom wall of the drive housing (502), and the worm (506) meshes with the worm gear (505).

5. The anti-interference type telescopic voltage transformer according to claim 4, characterized in that: A handle (507) is fixedly connected to one end of the worm (506), and the rotation of the worm (506) can be manually adjusted by rotating the handle (507).

6. The anti-interference type telescopic voltage transformer according to claim 1, characterized in that: The inner wall of the adjusting sleeve (1) is provided with a set of guide grooves (101) arranged along the length direction of the adjusting sleeve (1), and a set of guide blocks (401) is provided on the outer surface of the adjusting tube (4). Each guide block (401) is slidably connected to its adjacent guide groove (101).

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