Intelligent transformer tap switch combination device with state monitoring function

Abstract

The invention discloses an intelligent transformer tap switch combination device with a state monitoring function, which comprises a tap switch shell and a gear shifting device, a gear shifting switch for gear shifting and voltage regulation of a transformer is arranged at the top end of the gear shifting device, and a positioning disc is arranged on the outer wall of the tap switch shell and below the gear shifting switch. A limiting assembly used for limiting the position of the gear shifting switch is arranged in an inner cavity of the positioning disc, the limiting assembly comprises a dynamic friction disc and a plurality of static friction discs, and the static friction discs are evenly arranged in the inner cavity of the positioning disc and correspond to pressure regulating gears of the gear shifter. According to the transformer tap switch combination device, rotation of the gear shifting switch is blocked through friction force generated by mutual contact of the dynamic friction disc and the static friction disc, the situation of one-time gear shifting or wrong gear shifting of the gear shifting switch is prevented, the transformer is prevented from being electrically or mechanically impacted, the service life of the transformer is prolonged, and meanwhile the service life of the transformer is prolonged. The connection state of the contact and whether the switching is blocked or not are monitored in real time, and the use of the tap switch is ensured.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and more specifically to an intelligent transformer tap changer assembly with condition monitoring function. Background Technology

[0002] A transformer tap changer is a key voltage regulating device installed on the windings of a power transformer. Its core function is to adjust the output voltage by changing the turns ratio of the windings without interrupting the power supply. To achieve safe switching, it usually uses a transition circuit to limit the circulating current generated during tap switching. The complete system consists of three main parts: the tap changer, the tap selector, and the operating mechanism. The tap changer is responsible for carrying the switching current, the selector pre-connects the target tap, and the operating mechanism provides power and control. The tap adjuster, which is matched with the tap changer, is the drive and control system that can automatically issue tap adjustment commands according to voltage fluctuations. However, to prevent electrical or mechanical shock to the transformer, tap changers must be operated step-by-step when switching tap positions to avoid skipping taps. However, existing tap changers lack a blocking structure on the tap changer switch itself, making it prone to one-time or erroneous adjustments, which can cause electrical or mechanical shock to the transformer and affect its service life. Therefore, those skilled in the art have provided an intelligent transformer tap changer assembly with condition monitoring capabilities to solve the problems mentioned in the background. Summary of the Invention

[0003] The purpose of this invention is to provide an intelligent transformer tap changer assembly with status monitoring function. The friction generated by the contact between the moving friction plate and the stationary friction plate prevents the tap changer from rotating, thus preventing one-time or erroneous tap changes. This avoids electrical or mechanical shocks to the transformer, extends the transformer's service life, and simultaneously monitors the connection status of the contacts and whether the switching is stuck, ensuring the proper use of the tap changer. This solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: An intelligent transformer tap changer assembly with status monitoring function includes: a tap changer housing and a tap adjuster. A tap adjuster switch for adjusting the transformer tap and voltage is installed at the top of the tap adjuster. A positioning plate is installed on the outer wall of the tap changer housing below the tap adjuster switch. A limiting component for limiting the position of the tap adjuster switch is installed inside the positioning plate. The limiting component includes a moving friction plate and several stationary friction plates. The stationary friction plates are evenly distributed inside the positioning plate, corresponding to the voltage adjustment positions of the tap adjuster. The moving friction plate is installed at the bottom of the tap adjuster switch via a linkage rod. The moving friction plate can rotate with the tap adjuster switch and sequentially rub against the stationary friction plates inside the positioning plate. When the moving friction plate rubs against the stationary friction plates, the rotation of the tap adjuster switch is obstructed, preventing it from skipping taps.

[0005] As a further aspect of the present invention: the inner cavity of the positioning disk is provided with an annular groove, and both the dynamic friction disk and the static friction disk are disposed inside the annular groove. Furthermore, the upper end face of the dynamic friction disk is provided with a top end plate, and the back of the top end plate is installed at the bottom of the adjustment switch through a linkage rod. The adjustment switch can drive the dynamic friction disk to move inside the annular groove through the linkage rod to generate friction with the static friction disk in sequence.

[0006] As a further embodiment of the present invention: the upper end face of the positioning disk is provided with an annular through groove that communicates with the annular hollow groove, and the linkage rod passes through the annular through groove and slides inside it.

[0007] As a further embodiment of the present invention: a threaded groove is provided at the bottom of the gear shift switch at the position corresponding to the annular through groove, and the end of the linkage rod located above the positioning plate is threadedly installed inside the threaded groove.

[0008] As a further embodiment of the present invention: two locking nuts are provided on the outer wall of the linkage rod near the gear shift switch. The two locking nuts are threaded onto the outer wall of the linkage rod and screwed onto the lower end face of the gear shift switch in sequence. The internal threads of the two locking nuts are opposite in direction, and the internal thread of the locking nut near the gear shift switch is opposite in direction to the internal thread of the thread groove.

[0009] As a further embodiment of the present invention: a bottom end plate is provided on the lower end face of the static friction disc, a pull rod is provided on the back of the bottom end plate, a through hole is provided on the inner wall of the annular groove at the position corresponding to the pull rod, the pull rod passes through the through hole and extends to the bottom of the positioning disc, and a reset spring for resetting the static friction disc is provided between the inner wall of the annular groove and the lower end face of the bottom end plate and around the outside of the pull rod.

[0010] As a further embodiment of the present invention: a limiting end plate for limiting the position of the static friction disk is provided at one end of the pull rod located below the positioning disk, and a pull ring for driving the static friction disk to move is provided on the back of the limiting end plate.

[0011] As a further aspect of the present invention: the bottom end of the tap changer housing is evenly provided with a number of metal contacts for connecting to the taps of the transformer voltage regulating winding, and the metal contacts are provided with vibration acceleration sensors and fiber optic temperature sensors.

[0012] Compared with the prior art, the advantages of the present invention are as follows: By setting a limit component and installing the linkage rod at the bottom of the tap changer switch, the tap changer switch drives the moving friction plate to rotate in the positioning plate through the linkage rod, generating friction with the stationary friction plate in turn. The friction generated by the contact between the moving and stationary friction plates prevents the tap changer switch from rotating in one go or making a mistake, thus avoiding electrical or mechanical shock to the transformer and extending its service life. At the same time, by monitoring the connection status of the contacts and the switching jamming in real time, it is possible to confirm whether the internal contacts of the tap changer are worn or whether the spring energy storage is ineffective. This avoids the risk of internal arc short circuits and oil tank explosions caused by the tap changer refusing to operate or misoperating due to contact wear or spring energy storage failure, thereby improving safety. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a transformer tap changer according to an embodiment of the present invention; Figure 2 This is an assembly diagram of a dynamic friction disk and a static friction disk according to an embodiment of the present invention; Figure 3 This is a perspective view of a dynamic friction disc according to an embodiment of the present invention; Figure 4 This is a three-dimensional schematic diagram of a static friction disc according to an embodiment of the present invention.

[0014] In the diagram: 1. Tap switch housing; 11. Metal contact; 2. Adjuster; 21. Adjuster switch; 211. Threaded groove; 3. Positioning plate; 301. Annular slot; 302. Annular through slot; 303. Through hole; 31. Return spring; 4. Moving friction plate; 41. Top end plate; 42. Linkage rod; 43. Locking nut; 5. Static friction plate; 51. Bottom end plate; 52. Pull rod; 53. Limiting end plate; 54. Pull ring. Detailed Implementation

[0015] In the description of this invention, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0016] Combination Figures 1-4 As shown in this embodiment, the intelligent transformer tap changer assembly with status monitoring function includes: a tap changer housing 1 and a tap adjuster 2. The tap adjuster 2 has a tap adjuster switch 21 at its top for adjusting the transformer tap and voltage. When the system voltage fluctuates, the tap changer switch 21 changes the position of the tap changer contacts to adjust the transformer ratio and ensure power supply quality.

[0017] In this embodiment, a positioning disk 3 is provided on the outer wall of the tap changer housing 1 below the adjustment switch 21. The inner cavity of the positioning disk 3 is provided with a limiting component for limiting the position of the adjustment switch 21. The limiting component includes a moving friction disk 4 and several stationary friction disks 5. The several stationary friction disks 5 are evenly arranged in the inner cavity of the positioning disk 3 and correspond to the voltage adjustment positions of the adjustment switch 2. The moving friction disk 4 is installed at the bottom of the adjustment switch 21 through a linkage rod 42 on its top end plate 41. When adjusting the position, the adjustment switch 21 can drive the moving friction disk 4 to rotate in the annular groove 301 through the linkage rod 42, and generate friction with the stationary friction disks 5 at each position in turn. The friction generated by the contact between the moving friction disk 4 and the stationary friction disks 5 prevents the adjustment switch 21 from rotating, so that the rotation of the adjustment switch 21 is blocked and it cannot adjust the position by skipping levels. This prevents the adjustment switch 21 from adjusting the position at one time or by mistake, avoids the transformer from being subjected to electrical or mechanical shock, and extends the service life of the transformer.

[0018] In this embodiment, the upper surface of the positioning disk 3 is provided with an annular through groove 302 that communicates with the annular empty groove 301. The end of the linkage rod 42 located above the positioning disk 3 is installed at the bottom of the adjustment switch 21, so that the linkage rod 42 can slide in the annular through groove 302 as the adjustment switch 21 rotates, without causing interference between the linkage rod 42 and the positioning disk 3, thus ensuring the use of the linkage rod 42.

[0019] In this embodiment, a threaded groove 211 is provided at the bottom of the gear shift switch 21 at the position corresponding to the annular through groove 302. The linkage rod 42 is installed at the bottom of the gear shift switch 21 through the threaded groove 211, thereby realizing the assembly of the moving friction plate 4 and the gear shift switch 21. At the same time, by rotating the linkage rod 42 in the forward or reverse direction through the threaded groove 211, the length of the linkage rod 42 entering the threaded groove 211 can be adjusted, changing the height of the moving friction plate 4 at the other end of the linkage rod 42. This ensures that the moving friction plate 4 is always in contact with the stationary friction plate 5, avoiding the situation where the moving friction plate 4 and the stationary friction plate 5 wear out and cannot make contact with each other due to long-term friction, thus ensuring the use of the moving friction plate 4 and the stationary friction plate 5.

[0020] In this embodiment, two locking nuts 43 are provided on the outer wall of the linkage rod 42 near the gear shift switch 21. The two locking nuts 43 with opposite thread directions can be installed on the outer wall of the linkage rod 42 in sequence, so that the two locking nuts 43 are tightened on the lower end face of the gear shift switch 21 in sequence, which limits the position of the linkage rod 42 and the moving friction plate 4. This prevents the linkage rod 42 from being loosened or shifted due to external impact, which would cause the position of the moving friction plate 4 to change. This avoids the trouble of the moving friction plate 4 not being able to contact the stationary friction plate 5 due to the change in position, and ensures the stability of the position of the moving friction plate 4 after adjustment.

[0021] In this embodiment, a bottom end plate 51 is provided on the lower end face of the static friction disc 5, and a pull rod 52 is provided on the back of the bottom end plate 51. A through hole 303 is provided in the inner wall of the annular groove 301 at the position corresponding to the pull rod 52. The pull rod 52 passes through the through hole 303 and extends to the bottom of the positioning disc 3. The operator pulls the pull rod 52 through the pull ring 54 below the positioning disc 3 to move it in the through hole 303. This allows the pull rod 52 to pull the static friction disc 5 installed on the bottom end plate 51 downward and separate it from the dynamic friction disc 4. This prevents the static friction disc 5 at this position from interfering with the dynamic friction disc 4, ensuring the operation of the gear shifting switch 21.

[0022] In this embodiment, when the static friction disc 5 moves downward, it deforms by pressing the return spring 31 through the bottom end plate 51. After the gear adjustment is completed, the operator releases the pull ring 54 at that gear position, allowing the bottom end plate 51 to lift the static friction disc 5 back to its original position under the elastic force of the return spring 31, thereby achieving the blocking of the upper gear.

[0023] In this embodiment, since a limiting end plate 53 is provided at one end of the pull rod 52 located below the positioning plate 3, the position of the pull rod 52 can be limited by the limiting end plate 53, preventing the bottom end plate 51 from being affected by the elastic force of the reset spring 31 and causing the pull rod 52 to completely enter the annular groove 301. This avoids the situation where the position of the static friction plate 5 cannot be controlled due to the pull rod 52 completely entering the annular groove 301, and ensures the operation of the static friction plate 5 position adjustment.

[0024] In this embodiment, the bottom end of the tap changer housing 1 is uniformly provided with a plurality of metal contacts 11 for connecting to the taps of the transformer voltage regulating winding. Furthermore, the metal contacts 11 are provided with vibration acceleration sensors and fiber optic temperature sensors. The vibration acceleration sensors and fiber optic temperature sensors detect the vibration, sound signals and contact surface temperature generated by the collision and friction of the contacts, springs and transmission rods inside the tap changer, respectively. The connection status and switching status of the contacts are monitored to confirm whether the contacts inside the tap changer are worn or whether the spring energy storage is ineffective. This avoids the risk of the tap changer failing to operate or malfunctioning due to contact wear or spring energy storage failure, which could lead to internal arc short circuits or oil tank explosions in the transformer, thereby improving safety.

[0025] The working principle of this invention is as follows: The intelligent transformer tap changer assembly with status monitoring function proposed in this application, by setting a limit component, allows the linkage rod 42 to be installed at the bottom of the adjustment switch 21. When adjusting the gear, the adjustment switch 21 drives the moving friction disc 4 to rotate in the annular groove 301 through the linkage rod 42, generating friction with the stationary friction disc 5 at each gear position. The friction generated by the contact between the moving friction disc 4 and the stationary friction disc 5 blocks the rotation of the adjustment switch 21, preventing the adjustment switch 21 from skipping gears and preventing the adjustment switch 21 from making a one-time adjustment or mis-adjustment. This avoids electrical or mechanical shock to the transformer, extends the service life of the transformer, and at the same time, by monitoring the connection status and switching status of the contacts in real time, it confirms whether the internal contacts of the tap changer are worn or whether the spring energy storage is ineffective. This avoids the risk of the tap changer refusing to operate or mis-operating due to contact wear or spring energy storage failure, which could lead to internal arc short circuits or oil tank explosions in the transformer, thus improving safety.

[0026] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An intelligent transformer tap changer assembly with condition monitoring function, comprising: The tap changer housing (1) and the gear shifter (2) are characterized in that a gear shifter switch (21) for adjusting the voltage of the transformer is provided at the top of the gear shifter (2), and a positioning disk (3) is provided on the outer wall of the tap changer housing (1) below the gear shifter switch (21). The inner cavity of the positioning disk (3) is provided with a limiting component for limiting the position of the gear shifter switch (21). The limiting component includes a dynamic friction disk (4) and a plurality of static friction disks (5), wherein the plurality of static friction disks (5) are evenly arranged. The inner cavity of the positioning plate (3) corresponds to the pressure adjustment position of the gear shifter (2). The moving friction plate (4) is installed at the bottom of the gear shifting switch (21) via the linkage rod (42). The moving friction plate (4) can follow the rotation of the gear shifting switch (21) and generate friction with several static friction plates (5) in sequence in the inner cavity of the positioning plate (3). When the moving friction plate (4) rubs against the static friction plate (5), the rotation of the gear shifting switch (21) is blocked and it cannot shift gears.

2. The intelligent transformer tap changer assembly with status monitoring function according to claim 1, characterized in that, The positioning disk (3) has an annular groove (301) in its inner cavity. The moving friction disk (4) and the stationary friction disk (5) are both located inside the annular groove (301). The upper end face of the moving friction disk (4) is provided with a top end plate (41). The back of the top end plate (41) is installed at the bottom of the gear shift switch (21) via a linkage rod (42). The gear shift switch (21) can drive the moving friction disk (4) to move inside the annular groove (301) via the linkage rod (42) to generate friction with the stationary friction disk (5).

3. The intelligent transformer tap changer assembly with status monitoring function according to claim 2, characterized in that, The upper surface of the positioning disk (3) is provided with an annular through groove (302) that communicates with the annular hollow groove (301), and the linkage rod (42) passes through the annular through groove (302) and slides inside it.

4. The intelligent transformer tap changer assembly with status monitoring function according to claim 3, characterized in that, The bottom of the gear shift switch (21) is provided with a threaded groove (211) at the position corresponding to the annular through groove (302), and the end of the linkage rod (42) located above the positioning plate (3) is threaded inside the threaded groove (211).

5. The intelligent transformer tap changer assembly with status monitoring function according to claim 4, characterized in that, Two locking nuts (43) are provided on the outer wall of the linkage rod (42) near the gear shift switch (21). The two locking nuts (43) are threaded onto the outer wall of the linkage rod (42) and screwed onto the lower end face of the gear shift switch (21) in sequence. The internal threads of the two locking nuts (43) are opposite in direction. The internal thread of the locking nut (43) near the gear shift switch (21) is opposite in direction to the internal thread of the thread groove (211).

6. The intelligent transformer tap changer assembly with status monitoring function according to claim 2, characterized in that, The lower end face of the static friction disk (5) is provided with a bottom end plate (51), and a pull rod (52) is provided on the back of the bottom end plate (51). A through hole (303) is provided at the position corresponding to the pull rod (52) in the inner wall of the annular groove (301). The pull rod (52) passes through the through hole (303) and extends to the bottom of the positioning disk (3). A reset spring (31) for resetting the static friction disk (5) is provided between the inner wall of the annular groove (301) and the lower end face of the bottom end plate (51) and around the outside of the pull rod (52).

7. The intelligent transformer tap changer assembly with status monitoring function according to claim 6, characterized in that, The pull rod (52) is provided with a limiting end plate (53) at one end below the positioning plate (3) for limiting the position of the static friction plate (5), and a pull ring (54) for driving the static friction plate (5) to move is provided on the back of the limiting end plate (53).

8. The intelligent transformer tap changer assembly with status monitoring function according to claim 1, characterized in that, The bottom end of the tap changer housing (1) is uniformly provided with a number of metal contacts (11) for connecting to the taps of the transformer voltage regulating winding, and the metal contacts (11) are provided with a vibration acceleration sensor and an optical fiber temperature sensor.

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