Transformer tap switch

Abstract

The utility model discloses a transformer tap switch, and belongs to the technical field of tap switches. Comprising a rotating shaft used for being connected with a moving contact, the rotating shaft is rotationally arranged on the inner side of a connecting flange B, and the connecting flange B is fixedly arranged on the top of a transformer; the driving assembly is arranged at the top of the rotating shaft; the outer sleeve is fixedly arranged at the top of the connecting flange B; the gear signboards are arranged at the top of the outer sleeve; the driving assembly comprises a clamping block, and the clamping block is arranged on the inner side of the outer sleeve in a sliding mode. Due to the adoption of the limiting assemblies, when gears are adjusted, the clamping blocks can be limited by the corresponding limiting assemblies, so that the clamping blocks cannot continuously rotate, and the problems that in the prior art, a worker needs to control the force for rotating the rotating shaft, and if the force is too large, the clamping blocks cannot continuously rotate are effectively solved. And the roller moves out of the positioning groove, so that the gear shifting of the tap switch is avoided.

Description

Technical Field

[0001] This application relates to the field of tap changer technology, and more specifically, to a transformer tap changer. Background Technology

[0002] A transformer tap changer is a device that connects and switches the taps of a transformer winding. By changing the turns ratio of the high-voltage winding, it regulates the output voltage of the transformer.

[0003] In related technologies, in order to solve the problem that the positioning accuracy of the moving contact is often affected by the cumulative transmission error, resulting in a delayed arrival at the desired position, and that the moving contact is prone to shifting beyond its normal position to the ideal contact position when the switch is manually operated due to the existence of operating inertia in the various transmission components, for example, the prior art patent with publication number CN205911169U provides a shifting and repositioning device for a transformer tap changer. This device improves the operating feel when the moving contact of the tap changer rotates to the desired position by elastically engaging and disengaging the positioning groove and the elastic positioning element, and avoids the shifting of the moving contact when the switch is manually operated, thereby further improving the shifting performance and reliability of the tap changer.

[0004] Although the existing technical solutions mentioned above can improve the operating feel when the switch moving contact rotates to the correct position by setting up an elastic positioning element and cooperating with the positioning groove, in actual use, the operator needs to control the force of rotating the shaft. If too much force is applied, the roller will also move out of the positioning groove, causing the tap changer to run out of gear.

[0005] In view of this, we propose a transformer tap changer. Utility Model Content

[0006] The purpose of this application is to provide a transformer tap changer that can effectively solve the problem in the prior art where operators need to control the force of rotating the shaft. If too much force is applied, the rollers will move out of the positioning groove, causing the tap changer to run out of gear.

[0007] This application provides a transformer tap changer, including:

[0008] A rotating shaft is used to connect a moving contact. The rotating shaft is rotatably disposed inside the connecting flange B, which is fixedly disposed on the top of the transformer.

[0009] The drive assembly is located at the top of the rotating shaft;

[0010] The outer sleeve is fixedly installed on the top of the connecting flange B;

[0011] Several gear position indicator signs are placed on the top of the outer sleeve;

[0012] The drive component includes a locking block, which is slidably disposed on the inner side of the outer sleeve;

[0013] The inner side of the outer sleeve is provided with a ring array of several limiting components, each corresponding to a gear position indicator. The inner side of the outer sleeve is provided with a sliding groove corresponding to the gear position indicator array, and a support groove B is provided at the top of the sliding groove on the inner side of the outer sleeve. The locking block slides along the inner side of the sliding groove and the top of the support groove B. The limiting components are used to limit the sliding position of the locking block.

[0014] As an optional solution to the technical solution of this application, the card block is fixedly disposed on the outside of the connecting sleeve, two flower blocks are fixedly disposed on the inside of the connecting sleeve, two flower openings that cooperate with the two flower blocks are opened on the top of the outside of the rotating shaft, and a limit plate is detachably disposed on the top of the rotating shaft.

[0015] As an optional solution to the technical solution of this application, the top of the connecting sleeve is provided with a rotating handle, and the bottom of the rotating handle is detachably connected to the top of the connecting sleeve through a connecting flange C.

[0016] As an optional solution of the technical solution in this application, the inner side of the outer sleeve is provided with a support groove A at the bottom of the slide groove, the inner side of the support groove B is provided with a plurality of limiting grooves, the plurality of limiting components are respectively slidably disposed in the inner side of the corresponding limiting grooves, and baffles are fixedly disposed in the inner side of the plurality of limiting grooves.

[0017] As an optional solution to the technical solution of this application, the limiting component includes two rotating plates, which are located on both sides of the top of the slide groove, and are used to limit the sliding position of the block. Both rotating plates are rotatably disposed inside the corresponding connecting frame. Pull rings are fixedly disposed on the outer side of the connecting frame. The connecting frame is slidably disposed inside the limiting groove through two corresponding pull holes.

[0018] As an optional solution to the technical solution of this application, the inner side of the connecting frame is provided with two rotating slots, and the inner side of the rotating plate is rotatably disposed on the inner side of the corresponding rotating slot by a corresponding torsion spring and a rotating rod.

[0019] As an optional solution to the technical solution of this application, a switch housing is sleeved on the outer side of the rotating shaft, a connecting flange A is fixedly installed on the top of the switch housing, the bottom of the outer sleeve is detachably connected to the top of the connecting flange B through a connecting flange D, a top plate is detachably installed on the top of the outer sleeve, a plurality of gear position indicator plates are installed on the top of the top plate, and a fixing sleeve is detachably installed on the outer side of the rotating shaft at the bottom of the connecting flange B.

[0020] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0021] (1) Since this application uses a limit component, when adjusting the gear, the card block can be limited by the corresponding limit component, so that the card block cannot continue to rotate. Therefore, it effectively solves the problem in the prior art that the operator needs to control the force of rotating the shaft. If too much force is applied, the roller will also move out of the positioning groove, causing the tap changer to run out of gear.

[0022] (2) This application provides a detachable top plate at the top of the outer sleeve, which allows the structure inside the outer sleeve to be maintained by removing the top plate. Furthermore, a gear position indicator is provided at the top of the top plate corresponding to several limit components, which facilitates the observation and adjustment of the gear position by the staff. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a transformer tap changer disclosed in a preferred embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the assembly of the drive component and the outer sleeve in a transformer tap changer according to a preferred embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the structure of the rotating shaft in a transformer tap changer disclosed in a preferred embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the drive assembly in a transformer tap changer disclosed in a preferred embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the assembly of the outer sleeve and the limiting component in a transformer tap changer according to a preferred embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the outer sleeve of a transformer tap changer disclosed in a preferred embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the structure of the limit component in the transformer tap changer disclosed in a preferred embodiment of this application;

[0030] The following are the labeling instructions in the diagram: 1. Rotating shaft; 11. Connecting bolt A; 12. Slotted opening; 13. Switch housing; 131. Connecting flange A; 14. Limiting plate; 15. Connecting flange B; 16. Fixing sleeve; 2. Drive assembly; 21. Locking block; 22. Connecting sleeve; 23. Slotted block; 24. Rotating handle; 241. Connecting flange C; 3. Outer sleeve; 31. Limiting assembly; 311. Rotating plate; 3111. Torsion spring; 3112. Rotating rod; 312. Connecting frame; 3121. Rotating groove; 313. Pull ring; 32. Support groove A; 33. Slide groove; 34. Support groove B; 35. Limiting groove; 351. Baffle; 352. Pull opening; 36. Connecting flange D; 37. Top plate; 4. Gear position indicator. Detailed Implementation

[0031] The present application will be further described in detail below with reference to the accompanying drawings.

[0032] Reference Figure 1 - Figure 6 This application discloses a transformer tap changer, including a rotating shaft 1 for connecting a moving contact. The rotating shaft 1 is rotatably disposed inside a connecting flange B15, which is fixedly disposed on the top of the transformer. A drive assembly 2 is disposed on the top of the rotating shaft 1, and an outer sleeve 3 is fixedly disposed on the top of the connecting flange B15. A plurality of position indicator plates 4 are disposed on the top of the outer sleeve 3. The drive assembly 2 includes a locking block 21, which is slidably disposed inside the outer sleeve 3. A plurality of limiting components 31 are arranged in a circular array on the inner side of the outer sleeve 3, and the limiting components 31 are arranged one-to-one with the position indicator plates 4. A sliding groove 33 is opened on the inner side of the outer sleeve 3 corresponding to the array of position indicator plates 4. A support groove B34 is provided on the inner side of the outer sleeve 3 at the top of the sliding groove 33. The locking block 21 slides along the inner side of the sliding groove 33 and the top of the support groove B34. The limiting components 31 are used to limit the sliding position of the locking block 21.

[0033] A moving contact is fixedly installed at the bottom of the rotating shaft 1 by connecting bolt A11. The moving contact structure cooperates with several stationary contacts on the outside to realize voltage regulation. The process of the moving contact and stationary contact cooperating to realize voltage regulation is existing technology and will not be described in detail here.

[0034] When adjusting the gear, push the corresponding limit component 31 according to the gear position indicator 4, so that the limit component 31 slides to the inside of the outer sleeve 3. Then pull the drive component 2 upward, so that the locking block 21 slides inside the corresponding slide groove 33, so that the locking block 21 slides to the inside of the support groove B34. Then rotate the locking block 21, so that the locking block 21 rotates to the inside of the corresponding limit component 31, so that the limit component 31 restricts the sliding position of the locking block 21. At this time, press the drive component 2 downward, so that the locking block 21 slides back to its original position inside the corresponding slide groove 33. At this time, the moving contact at the bottom of the rotating shaft 1 contacts the corresponding stationary contact, thus completing the gear adjustment.

[0035] Reference Figure 2 - Figure 7 The locking block 21 is fixedly installed on the outside of the connecting sleeve 22. Two flower blocks 23 are fixedly installed on the inside of the connecting sleeve 22. The top of the outer side of the rotating shaft 1 is provided with two flower openings 12 that cooperate with the two flower blocks 23. The top of the rotating shaft 1 is detachably provided with a limiting plate 14. The top of the connecting sleeve 22 is provided with a rotating handle 24. The bottom of the rotating handle 24 is detachably connected to the top of the connecting sleeve 22 through a connecting flange C241. The inner side of the outer sleeve 3 is provided with a support groove A32 at the bottom of the slide groove 33. The inner side of the support groove B34 is provided with several limiting grooves 35. Several limiting components 31 are slidably installed inside the corresponding limiting grooves 35. A baffle 351 is fixedly installed on the inner side of the limiting groove 35. The limiting component 31 includes two rotating plates 311, which are located on both sides of the top of the slide groove 33, respectively, to limit the sliding position of the locking block 21. Both rotating plates 311 are rotatably installed on the inner side of the corresponding connecting frame 312. Pull rings 313 are fixedly installed on the outer side of the connecting frame 312. The connecting frame 312 is slidably installed on the inner side of the limiting groove 35 through the corresponding two pull holes 352. Two rotating grooves 3121 are opened on the inner side of the connecting frame 312. The inner side of the rotating plate 311 is rotatably installed on the inner side of the corresponding rotating groove 3121 through the corresponding torsion spring 3111 and rotating rod 3112.

[0036] When adjusting the gear, push the corresponding pull ring 313 according to the gear position indicator 4, so that the pull ring 313 drives the connecting bracket 312 to slide inside the outer sleeve 3. After being blocked by the baffle 351, stop pushing. Then pull the rotating handle 24 upward, so that the rotating handle 24 drives the connecting sleeve 22 to slide upward, thereby driving the locking block 21 to slide inside the corresponding slide groove 33. With the cooperation of the flower block 23 and the flower opening 12, the locking block 21 slides to the inside of the support groove B34 and can no longer move upward. Then rotate the rotating handle 24, so that the rotating handle 24 drives the connecting sleeve 22 and the locking block 21 to rotate, so that the locking block 21 rotates to one side of the corresponding rotating plate 311. Under the torque of the torsion spring 3111, it can rotate. Continue to rotate the handle 24 to make the corresponding rotating plate 311 rotate, so that the locking block 21 rotates to the inner side of the two corresponding rotating plates 311. The locking block 21 will touch the other rotating plate 311 as it continues to rotate. The rotating plate 311 cannot rotate due to the obstruction of the connecting frame 312 and the inner side of the limiting groove 35, thus limiting the locking block 21 and preventing it from rotating further. At this time, press the handle 24 down to make the locking block 21 slide inside the corresponding sliding groove 33. The locking block 21 moves to the top of the support groove A32. At this time, the moving contact at the bottom of the rotating shaft 1 just contacts the corresponding stationary contact, completing the gear adjustment.

[0037] When connecting the rotating shaft 1 and the drive assembly 2, firstly, the connecting sleeve 22 is fitted onto the outer side of the top of the rotating shaft 1 by engaging the flower block 23 through the flower opening 12. Then, the limiting plate 14 is fixed on the top of the rotating shaft 1 to limit the flower block 23. Finally, the rotating handle 24 is installed on the top of the connecting sleeve 22 through the connecting flange C241, thus completing the installation of the rotating shaft 1 and the drive assembly 2.

[0038] Reference Figure 1 , Figure 3 and Figure 5 A switch housing 13 is sleeved on the outside of the rotating shaft 1. A connecting flange A131 is fixedly installed on the top of the switch housing 13. The bottom of the outer sleeve 3 is detachably connected to the top of the connecting flange B15 via a connecting flange D36. A top plate 37 is detachably installed on the top of the outer sleeve 3. Several gear position indicator plates 4 are installed on the top of the top plate 37. A fixing sleeve 16 is detachably installed on the outside of the rotating shaft 1 at the bottom of the connecting flange B15.

[0039] The device is fixed to the top of the transformer by connecting flanges A131 and B15. Connecting flange D36 and top plate 37 facilitate the installation and removal of outer sleeve 3. Fixing sleeve 16 is used to limit the rotation shaft 1 to prevent the rotation shaft 1 from moving upward when the rotation handle 24 is pulled up.

[0040] In summary, when using the transformer tap changer disclosed in this application, the corresponding pull ring 313 is pushed according to the tap position indicator 4, causing the pull ring 313 to drive the connecting bracket 312 to slide inwards towards the outer sleeve 3. The push stops after being blocked by the baffle 351. Then, the rotating handle 24 is pulled upwards, causing the rotating handle 24 to drive the connecting sleeve 22 to slide upwards, thereby causing the locking block 21 to slide inwards towards the corresponding groove 33. With the cooperation of the flower block 23 and the flower opening 12, the locking block 21 slides to the inside of the support groove B34 and cannot move upwards further. Then, the rotating handle 24 is rotated, causing the rotating handle 24 to drive the connecting sleeve 22 and the locking block 21 to rotate, causing the locking block 21 to rotate to the corresponding position on the rotating plate 311. On the side, since the rotating plate 311 can rotate under the torque of the torsion spring 3111, continue to rotate the rotating handle 24 to make the corresponding rotating plate 311 rotate, so that the locking block 21 rotates to the inner side of the corresponding two rotating plates 311. The locking block 21 will touch the other rotating plate 311 as it continues to rotate. The rotating plate 311 cannot rotate due to the obstruction of the connecting frame 312 and the inner side of the limiting groove 35, thus limiting the locking block 21 and preventing it from rotating further. At this time, press the rotating handle 24 down to make the locking block 21 slide inside the corresponding sliding groove 33. The locking block 21 moves to the top of the support groove A32. At this time, the moving contact at the bottom of the rotating shaft 1 just contacts the corresponding stationary contact, completing the gear adjustment.

Claims

1. A transformer tap changer, characterized in that, Include: A rotating shaft (1) is used to connect a moving contact. The rotating shaft (1) is rotatably disposed inside the connecting flange B (15), which is fixedly disposed on the top of the transformer. The drive assembly (2) is located on top of the rotating shaft (1); The outer sleeve (3) is fixedly installed on the top of the connecting flange B (15); Several gear position signs (4) are placed on the top of the outer sleeve (3); The drive component (2) includes a locking block (21), which is slidably disposed on the inner side of the outer sleeve (3); The inner side of the outer sleeve (3) is provided with a number of limiting components (31) arranged in a ring array. The limiting components (31) are arranged one-to-one with the gear position indicator (4). The inner side of the outer sleeve (3) is provided with a sliding groove (33) corresponding to the gear position indicator (4) array. The inner side of the outer sleeve (3) is provided with a support groove B (34) at the top of the sliding groove (33). The locking block (21) slides along the inner side of the sliding groove (33) and the top of the support groove B (34). The limiting components (31) are used to limit the sliding position of the locking block (21).

2. The transformer tap changer according to claim 1, characterized in that: The card block (21) is fixedly disposed on the outside of the connecting sleeve (22), and two flower blocks (23) are fixedly disposed on the inside of the connecting sleeve (22). The top of the outer side of the rotating shaft (1) is provided with two flower openings (12) that cooperate with the two flower blocks (23). The top of the rotating shaft (1) is detachably provided with a limiting plate (14).

3. The transformer tap changer according to claim 2, characterized in that: The top of the connecting sleeve (22) is provided with a rotating handle (24), and the bottom of the rotating handle (24) is detachably connected to the top of the connecting sleeve (22) via a connecting flange C (241).

4. The transformer tap changer according to claim 1, characterized in that: The inner side of the outer sleeve (3) is provided with a support groove A (32) at the bottom of the slide groove (33). The inner side of the support groove B (34) is provided with a plurality of limiting grooves (35). A plurality of limiting components (31) are slidably disposed in the inner side of the corresponding limiting grooves (35). A baffle (351) is fixedly disposed in the inner side of the plurality of limiting grooves (35).

5. The transformer tap changer according to claim 4, characterized in that: The limiting component (31) includes two rotating plates (311), which are located on both sides of the top of the slide groove (33) to limit the sliding position of the locking block (21). Both rotating plates (311) are rotatably disposed inside the corresponding connecting frame (312). Pull rings (313) are fixedly disposed on the outer side of the connecting frame (312). The connecting frame (312) is slidably disposed inside the limiting groove (35) through two corresponding pull holes (352).

6. The transformer tap changer according to claim 5, characterized in that: The inner side of each connecting frame (312) has two rotating grooves (3121), and the inner side of each rotating plate (311) is rotatably set on the inner side of the corresponding rotating groove (3121) by a corresponding torsion spring (3111) and a rotating rod (3112).

7. The transformer tap changer according to claim 1, characterized in that: A switch housing (13) is sleeved on the outside of the rotating shaft (1). A connecting flange A (131) is fixedly installed on the top of the switch housing (13). The bottom of the outer sleeve (3) is detachably connected to the top of the connecting flange B (15) through the connecting flange D (36). A top plate (37) is detachably installed on the top of the outer sleeve (3). Several gear position signs (4) are installed on the top of the top plate (37). A fixing sleeve (16) is detachably installed on the outside of the rotating shaft (1) at the bottom of the connecting flange B (15).

Images