Transmission device of dry-type vacuum on-load tap-changer

Abstract

The utility model discloses a transmission device of a dry-type vacuum on-load tap-changer, and relates to the technical field of on-load tap-changers. The transmission device of the dry-type vacuum on-load tap-changer comprises a motor which is arranged on a cabinet body of the dry-type vacuum on-load tap-changer; a selection shaft transmission assembly, a first transmission shaft is arranged between the selection shaft transmission assembly and a selection shaft of the selection switch, and the selection shaft transmission assembly is detachably connected with the first transmission shaft; a second transmission shaft is arranged between the switching shaft transmission assembly and the switching shaft of the switching switch, and the switching shaft transmission assembly is detachably connected with the second transmission shaft. According to the transmission device of the on-load tap-changer, under the condition that the structures and positions of the motor, the selection shaft transmission assembly and the switching shaft transmission assembly are not changed, only the first transmission shaft and the second transmission shaft which are different in length need to be assembled, the transmission device can adapt to different positions of the selection switch and the switching switch, and therefore the applicability of the transmission device of the on-load tap-changer is improved.

Description

Technical Field

[0001] This utility model relates to the field of on-load tap changer technology, and in particular to a transmission device for a dry vacuum on-load tap changer. Background Technology

[0002] An on-load tap changer is a switching device that provides a constant voltage to a transformer when the load changes. Its basic principle is to switch between taps in the transformer winding without interrupting the load current, thereby changing the number of turns in the winding, i.e., the voltage ratio of the transformer, and ultimately achieving the purpose of voltage regulation. The tap changer is designed as a combined mechanism, that is, the selection part first pre-selects the tap position. After the pre-selection is completed, the switching switch performs the tap position switching operation. After the switching switch operation is completed, one tap change operation is completed.

[0003] With the continuous development and innovation of the State Grid, the requirements for switches are becoming more diverse, and the positions of selector switches and changeover switches are also changing. However, current transmission devices are all mounted on a single mounting plate, which cannot adapt to different positions of selector switches and changeover switches, thus reducing the applicability of the transmission device. Utility Model Content

[0004] In view of the deficiencies in the existing technology, the technical problem solved by this utility model is: how to improve the applicability of the transmission device of on-load tap changer.

[0005] To achieve the above objectives, the present invention provides a transmission device for a dry vacuum on-load tap changer, comprising:

[0006] The motor is mounted on the cabinet of the dry-type vacuum on-load tap changer.

[0007] The selection shaft drive assembly is mounted on the motor. A first drive shaft is provided between the selection shaft drive assembly and the selection shaft of the selection switch. The selection shaft drive assembly and the first drive shaft are detachably connected to achieve rotation of the selection shaft.

[0008] A switching shaft drive assembly is mounted on the motor. A second drive shaft is provided between the switching shaft drive assembly and the switching shaft of the switching switch. The switching shaft drive assembly and the second drive shaft are detachably connected to enable the switching shaft to rotate.

[0009] By adopting the above technical solution, the first drive shaft and the selection shaft drive assembly are detachably connected. Therefore, when the position of the selector switch changes, only a first drive shaft of different lengths needs to be selected for adaptation. Similarly, the second drive shaft and the switching shaft drive assembly are detachably connected. Therefore, when the position of the switch changes, only a second drive shaft of different lengths needs to be selected for adaptation. Thus, without changing the structure and position of the motor, the selection shaft drive assembly, and the switching shaft drive assembly, only the first and second drive shafts of different lengths need to be assembled to adapt to different selector switches and switch positions, thereby improving the applicability of the on-load tap changer drive device.

[0010] In one embodiment, the selection shaft transmission assembly includes a first fixed base, a first bevel gear, a second bevel gear, a first gear, and a second gear. The motor is fixedly mounted on the first fixed base, and the first fixed base is fixedly mounted on the cabinet. The first bevel gear is fixedly connected to the drive shaft of the motor. The second bevel gear meshes with the first bevel gear. The first gear is fixedly connected to the second bevel gear via a first shaft to achieve rotation of the first gear. The second gear meshes with the first gear and is fixedly connected to the first transmission shaft via a second shaft to achieve rotation of the first transmission shaft.

[0011] By adopting the above technical solution, the first drive shaft can be rotated, thereby driving the selection shaft to rotate, and the drive device can be fixed to the cabinet through the first fixed base to prevent the drive device from falling off during operation.

[0012] In one embodiment, the switching shaft transmission assembly includes a third gear, a fourth gear, and an energy storage assembly. The third gear is fixedly connected to a second bevel gear via a first shaft. The fourth gear meshes with the third gear and is connected to the energy storage assembly to store energy. The energy storage assembly is connected to a second transmission shaft to release energy and cause the second transmission shaft to rotate.

[0013] By adopting the above technical solution, on the basis of realizing the rotation of the first drive shaft, an additional structure can be added to realize the rotation of the second drive shaft, thereby driving the rotation of the switching shaft. Therefore, the number of parts used in the drive structure is reduced, which not only saves costs, but also reduces the size of the overall drive device.

[0014] In one embodiment, the energy storage component includes a first rocker arm, a connecting rod, a rocker arm, a spring assembly, and a second rocker arm. The first rocker arm is fixedly connected to a fourth gear via a third shaft. The connecting rod is rotatably mounted on the first rocker arm via a fourth shaft. The rocker arm is rotatably mounted on the connecting rod via a fifth shaft. The spring assembly is connected to the rocker arm via a sixth shaft to achieve energy storage. One side of the second rocker arm is connected to the spring assembly to achieve energy release from the spring assembly and rotation of the second rocker arm. The other side of the second rocker arm is fixedly connected to a second transmission shaft to achieve rotation of the second transmission shaft.

[0015] By adopting the above technical solution, the energy storage component can achieve energy storage and release with just some arms, rods and springs. It is not only low in cost, but also fast in response, thereby driving the switching shaft to move quickly within a certain angle.

[0016] In one embodiment, a shock-absorbing assembly is provided on the second rocker arm. The shock-absorbing assembly includes a shock-absorbing block, a shock absorber, and a second fixed base. The shock-absorbing block is fixedly disposed on the second rocker arm. The second rocker arm and the second drive shaft are fixedly connected by a seventh shaft, which passes through the second fixed base. The shock absorber is disposed on the second fixed base to absorb excess energy.

[0017] By adopting the above technical solution, excessive energy released by the spring assembly is avoided, which could cause the second rocker arm to rotate excessively, thereby preventing the switch from working properly or even damaging the switch. Therefore, a shock-absorbing component is set up to absorb excess energy.

[0018] In one embodiment, a third bevel gear is fixedly mounted on the third shaft, and a fourth bevel gear is meshed with the third bevel gear. The fourth bevel gear is connected to the gear position indicator component via the eighth shaft, so that the gear position indicator component can display the pre-selected gear of the selection switch.

[0019] By adopting the above technical solution, after the selector switch is pre-selected, the selected gear can be intuitively observed through the gear indicator component.

[0020] In one embodiment, the gear position indicator assembly includes a third base, a swivel component, a grooved wheel, and a gear position indicator disc. The third base is disposed on the cabinet, the swivel component is fixedly disposed on the eighth shaft, the swivel component is connected to the grooved wheel, and the grooved wheel is disposed on the third base to realize the rotation of the grooved wheel. The gear position indicator disc is fixedly disposed on the grooved wheel, and the gear position indicator disc and the grooved wheel are concentric.

[0021] By adopting the above technical solution, the indicating position of the gear indicator can be changed according to the transmission structure. The transmission structure of the gear indicator component is related to the switching shaft transmission component, and thus related to the selection shaft transmission component, so as to improve the accuracy of the display.

[0022] In one embodiment, a limit switch is provided on the third base to enable the release and fixation of the grooved wheel and the third base.

[0023] By adopting the above technical solution, when it is necessary to move the wheel, the grooved wheel is released from the third base, and after the movement is completed, the grooved wheel is fixed to the third base.

[0024] In summary, this utility model has at least one of the following beneficial technical effects:

[0025] 1. The motor drives the first drive shaft to rotate through the selection shaft drive assembly to achieve the rotation of the selection shaft. The motor drives the second drive shaft to rotate through the switching shaft drive assembly to achieve the rotation of the switching shaft. The first drive shaft and the selection shaft drive assembly are detachably connected, and the second drive shaft and the switching shaft drive assembly are detachably connected. Without changing the structure and position of the motor, the selection shaft drive assembly, and the switching shaft drive assembly, only the first drive shaft and the second drive shaft of different lengths need to be assembled to adapt to different selection switches and switching switch positions, thereby improving the applicability of the on-load tap changer drive device.

[0026] 2. By adding a structure to achieve the rotation of the first drive shaft, the rotation of the second drive shaft can be achieved, thereby driving the rotation of the switching shaft. This reduces the number of parts used in the drive structure, saving costs and reducing the overall size of the drive device. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the transmission device of the dry vacuum on-load tap changer according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 Side view.

[0029] In the diagram: 1-Motor, 2-Rotary shaft transmission assembly, 21-First bevel gear, 22-Second bevel gear, 23-First fixed base, 24-First shaft, 25-First gear, 26-Second gear, 27-Second shaft, 3-Switching shaft transmission assembly, 301-Third gear, 302-Fourth gear, 303-Third shaft, 304-First rocker arm, 305-Fourth shaft, 306-Connecting rod, 307-Fifth shaft, 308-Rock arm, 309-Sixth shaft, 3010-Spring assembly, 3011-Second rocker arm, 3012-Shock absorber, 3013-Second fixed base, 3014-Shock absorber, 4-First transmission shaft, 5-Second transmission shaft, 6-Third bevel gear, 7-Fourth bevel gear, 8-Eighth shaft, 9-Gear position indicator assembly, 91-Third base, 92-Gate slot piece, 93-Gate wheel, 94-Gear position indicator disc, 95-Limit switch. Detailed Implementation

[0030] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0031] The transmission device of the dry vacuum on-load tap changer in this embodiment of the invention is described in [reference needed]. Figure 1 , 2 As shown, the transmission device of the dry vacuum on-load tap changer includes a motor 1, which is mounted on the cabinet of the dry vacuum on-load tap changer; a selection shaft transmission assembly, which is mounted on the motor 1, and a first transmission shaft 4 is provided between the selection shaft transmission assembly and the selection shaft of the selector switch, and the selection shaft transmission assembly and the first transmission shaft 4 are detachably connected to realize the rotation of the selection shaft; and a switching shaft transmission assembly 3, which is mounted on the motor 1, and a second transmission shaft 5 is provided between the switching shaft transmission assembly 3 and the switching shaft of the switch, and the switching shaft transmission assembly 3 and the second transmission shaft 5 are detachably connected to realize the rotation of the switching shaft.

[0032] Therefore, it can be seen that the motor 1 of this utility model drives the first transmission shaft 4 to rotate through the selection shaft transmission assembly, thereby achieving the rotation of the selection shaft. The motor 1 drives the second transmission shaft 5 to rotate through the switching shaft transmission assembly 3, thereby achieving the rotation of the switching shaft. The first transmission shaft 4 and the selection shaft transmission assembly are detachably connected, and the second transmission shaft 5 and the switching shaft transmission assembly 3 are also detachably connected. Therefore, when the position of the selector switch changes, only different lengths of the first transmission shaft 4 need to be selected for adaptation. Similarly, the second transmission shaft 5 and the switching shaft transmission assembly 3 are detachably connected, so when the position of the switch changes, only different lengths of the second transmission shaft 5 need to be selected for adaptation. Thus, without changing the structure and position of the motor 1, the selection shaft transmission assembly, and the switching shaft transmission assembly 3, only different lengths of the first transmission shaft 4 and the second transmission shaft 5 need to be assembled to adapt to different selector switches and switch positions, thereby improving the applicability of the on-load tap changer transmission device.

[0033] Preferably, a specific structure for selecting the shaft drive assembly is provided:

[0034] The selected shaft drive assembly includes a first fixed base 23, a first bevel gear 21, a second bevel gear 22, a first gear 25, and a second gear 26. The motor 1 is fixedly mounted on the first fixed base 23, and the first fixed base 23 is fixedly mounted on the cabinet. The first bevel gear 21 is fixedly connected to the drive shaft of the motor 1. The second bevel gear 22 is meshed with the first bevel gear 21. The first gear 25 is fixedly connected to the second bevel gear 22 through the first shaft 24 to achieve rotation of the first gear 25. The second gear 26 is meshed with the first gear 25. The second gear 26 is fixedly connected to the first drive shaft 4 through the second shaft 27 to achieve rotation of the first drive shaft 4.

[0035] Specifically, the motor 1 is fixed to the bottom of the first fixed base 23, and its drive shaft extends to the top of the first fixed base 23. The drive shaft drives the first bevel gear 21 to rotate, and the first bevel gear 21 drives the second bevel gear 22 to rotate. Since the second bevel gear 22 and the first gear 25 are fixedly connected through the first shaft 24, the second bevel gear 22 drives the first gear 25 to rotate, and the first gear 25 drives the second gear 26 to rotate. Since the second gear 26 and the first transmission shaft 4 are fixedly connected through the second shaft 27, the second gear 26 drives the first transmission shaft 4 to rotate, thereby driving the rotating shaft to rotate. At the same time, the drive device can be fixed to the cabinet through the first fixed base 23 to prevent the drive device from falling during operation.

[0036] Furthermore, a specific structure of the switching shaft drive assembly 3 is provided:

[0037] The switching shaft transmission assembly 3 includes a third gear 301, a fourth gear 302, and an energy storage assembly. The third gear 301 is fixedly connected to the second bevel gear 22 via the first shaft 24. The fourth gear 302 meshes with the third gear 301 and is connected to the energy storage assembly to enable the energy storage assembly to store energy. The energy storage assembly is connected to the second transmission shaft 5 to enable the energy storage assembly to release energy and cause the second transmission shaft 5 to rotate.

[0038] Specifically, the third gear 301 is fixed between the second bevel gear 22 and the first gear 25, that is, fixedly mounted on the first shaft 24, so that the second bevel gear 22 drives the third gear 301 to rotate, and the third gear 301 drives the fourth gear 302 to rotate. The kinetic energy of the rotation of the fourth gear 302 can be stored in the energy storage component, and then the stored energy is released to drive the second transmission shaft 5 to rotate, thereby driving the switching shaft to rotate. On the basis of realizing the rotation of the first transmission shaft 4, an additional structure can be added to realize the rotation of the second transmission shaft 5, thereby driving the switching shaft to rotate. Therefore, the number of parts used in the drive structure is reduced, which not only saves costs, but also reduces the size of the overall drive device.

[0039] Furthermore, the energy storage component includes a first rocker arm 304, a connecting rod 306, a rocker arm 308, a spring assembly 3010, and a second rocker arm 3011. The first rocker arm 304 is fixedly connected to a fourth gear 302 via a third shaft 303. The connecting rod 306 is rotatably mounted on the first rocker arm 304 via a fourth shaft 305. The rocker arm 308 is rotatably mounted on the connecting rod 306 via a fifth shaft 307. The spring assembly 3010 is connected to the rocker arm 308 via a sixth shaft 309 to achieve energy storage in the spring assembly 3010. One side of the second rocker arm 3011 is connected to the spring assembly 3010 to achieve energy release from the spring assembly 3010 and rotation of the second rocker arm 3011. The other side of the second rocker arm 3011 is fixedly connected to a second transmission shaft 5 to achieve rotation of the second transmission shaft 5.

[0040] Specifically, the fourth gear 302 drives the first rocker arm 304 to swing via the third shaft 303. The first rocker arm 304 drives the connecting rod 306 to swing via the fourth shaft 305. The connecting rod 306 drives the rocker arm 308 to swing via the fifth shaft 307. The rocker arm 308 compresses or stretches the spring assembly 3010 via the sixth shaft 309, thereby converting kinetic energy into elastic potential energy. The release of elastic potential energy drives the second rocker arm 3011 to rotate. The second rocker arm 3011 drives the second transmission shaft 5 to rotate, thereby driving the switching shaft to rotate. This energy storage component only needs some arms, rods and springs to achieve energy storage and release. It is not only low in cost, but also has a fast response speed, thereby driving the switching shaft to move rapidly within a certain angle.

[0041] Furthermore, a shock-absorbing assembly is provided on the second rocker arm 3011. The shock-absorbing assembly includes a shock-absorbing block 3012, a shock absorber 3014, and a second fixed base 3013. The shock-absorbing block 3012 is fixedly installed on the second rocker arm 3011. The second rocker arm 3011 is fixedly connected to the second transmission shaft 5 through a seventh shaft, which passes through the second fixed base 3013. The shock absorber 3014 is installed on the second fixed base 3013 to absorb excess energy.

[0042] Specifically, during the rotation of the second rocker arm 3011, the shock absorber 3012 on the second rocker arm 3011 will collide with the shock absorber 3014 on the second fixed base 3013 to absorb excess energy and prevent the spring assembly 3010 from releasing too much energy, which would cause the second rocker arm 3011 to rotate excessively, thereby causing the switch to malfunction or even damage the switch. Therefore, a shock absorber is set up to absorb excess energy.

[0043] Preferably, a third bevel gear 6 is fixedly mounted on the third shaft 303, and a fourth bevel gear 7 is meshed on the third bevel gear 6. The fourth bevel gear 7 is connected to the gear position indicator component 9 through the eighth shaft 8, so that the gear position indicator component 9 can display the pre-selected gear of the selection switch.

[0044] Specifically, during the selection process of the selector switch, the third bevel gear 6 drives the fourth bevel gear 7 to rotate, and the fourth bevel gear 7 drives the gear position indicator component 9 to adjust through the eighth shaft 8. The gear position selected by the selector switch can be observed intuitively through the gear position indicator component 9.

[0045] Furthermore, a specific structure for a gear position indicator component 9 is provided:

[0046] The gear position indicator assembly 9 includes a third base 91, a swivel piece 92, a grooved wheel 93, and a gear position indicator disk 94. The third base 91 is mounted on the cabinet. The swivel piece 92 is fixedly mounted on the eighth shaft 8. The swivel piece 92 is connected to the grooved wheel 93, and the grooved wheel 93 is mounted on the third base 91 to enable the grooved wheel 93 to rotate. The gear position indicator disk 94 is fixedly mounted on the grooved wheel 93, and the gear position indicator disk 94 and the grooved wheel 93 are concentric.

[0047] Specifically, the eighth shaft 8 drives the shifting component 92 to rotate, which in turn actuates the grooved wheel 93, causing the grooved wheel 93 to rotate. This, in turn, drives the gear position indicator 94 to rotate, displaying different gear information. The indication position of the gear position indicator 94 can be changed according to the transmission structure. Furthermore, the transmission structure of the gear position indicator assembly 9 is related to the switching shaft transmission assembly 3, and thus to the selection shaft transmission assembly, thereby improving display accuracy.

[0048] Furthermore, a limit switch 95 is provided on the third base 91 to enable the release and fixation between the grooved wheel 93 and the third base 91.

[0049] Specifically, when it needs to be turned, the grooved wheel 93 is released from the third base 91, and after the turning is completed, the grooved wheel 93 is fixed to the third base 91, further improving the accuracy of the display.

[0050] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A transmission device for a dry-type vacuum on-load tap changer, characterized in that, It includes: The motor (1) is mounted on the cabinet of the dry-type vacuum on-load tap changer; The selection shaft drive assembly is mounted on the motor (1). A first drive shaft (4) is provided between the selection shaft drive assembly and the selection shaft of the selection switch. The selection shaft drive assembly and the first drive shaft (4) are detachably connected to achieve rotation of the selection shaft. The switching shaft drive assembly (3) is mounted on the motor (1). A second drive shaft (5) is provided between the switching shaft drive assembly (3) and the switching shaft of the switching switch. The switching shaft drive assembly (3) and the second drive shaft (5) are detachably connected to achieve the rotation of the switching shaft.

2. The transmission device for the dry-type vacuum on-load tap changer as described in claim 1, characterized in that: The selector shaft transmission assembly includes a first fixed base (23), a first bevel gear (21), a second bevel gear (22), a first gear (25), and a second gear (26). The motor (1) is fixedly mounted on the first fixed base (23), and the first fixed base (23) is fixedly mounted on the cabinet. The first bevel gear (21) is fixedly connected to the drive shaft of the motor (1). The second bevel gear (22) is meshed with the first bevel gear (21). The first gear (25) is fixedly connected to the second bevel gear (22) through the first shaft (24) to realize the rotation of the first gear (25). The second gear (26) is meshed with the first gear (25). The second gear (26) is fixedly connected to the first transmission shaft (4) through the second shaft (27) to realize the rotation of the first transmission shaft (4).

3. The transmission device for a dry vacuum on-load tap changer as described in claim 2, characterized in that: The switching shaft transmission assembly (3) includes a third gear (301), a fourth gear (302), and an energy storage assembly. The third gear (301) is fixedly connected to the second bevel gear (22) via the first shaft (24). The fourth gear (302) meshes with the third gear (301) and is connected to the energy storage assembly to enable the energy storage assembly to store energy. The energy storage assembly is connected to the second transmission shaft (5) to enable the energy storage assembly to release energy and cause the second transmission shaft (5) to rotate.

4. The transmission device for the dry-type vacuum on-load tap changer as described in claim 3, characterized in that: The energy storage component includes a first rocker arm (304), a connecting rod (306), a rocker arm (308), a spring assembly (3010), and a second rocker arm (3011). The first rocker arm (304) is fixedly connected to a fourth gear (302) via a third shaft (303). The connecting rod (306) is rotatably mounted on the first rocker arm (304) via a fourth shaft (305). The rocker arm (308) is rotatably mounted on the connecting rod (306) via a fifth shaft (307). The spring assembly (3010) is connected to the rocker arm (308) via a sixth shaft (309) to realize energy storage in the spring assembly (3010). One side of the second rocker arm (3011) is connected to the spring assembly (3010) to realize energy release from the spring assembly (3010) and rotation of the second rocker arm (3011). The other side of the second rocker arm (3011) is fixedly connected to a second transmission shaft (5) to realize rotation of the second transmission shaft (5).

5. The transmission device for a dry vacuum on-load tap changer as described in claim 4, characterized in that: The second rocker arm (3011) is provided with a shock-absorbing component, which includes a shock-absorbing block (3012), a shock absorber (3014), and a second fixed base (3013). The shock-absorbing block (3012) is fixedly installed on the second rocker arm (3011). The second rocker arm (3011) is fixedly connected to the second transmission shaft (5) through a seventh shaft, and the seventh shaft passes through the second fixed base (3013). The shock absorber (3014) is installed on the second fixed base (3013) so that the shock absorber (3014) can absorb excess energy.

6. The drive device for a dry vacuum on-load tap changer as described in claim 4, characterized in that: A third bevel gear (6) is fixedly installed on the third shaft (303), and a fourth bevel gear (7) is meshed on the third bevel gear (6). The fourth bevel gear (7) is connected to the gear position indicator component (9) through the eighth shaft (8) so that the gear position indicator component (9) can display the pre-selected gear position of the selection switch.

7. The drive device for a dry-type vacuum on-load tap changer as described in claim 6, characterized in that: The gear position indicator assembly (9) includes a third base (91), a slotted part (92), a grooved wheel (93), and a gear position indicator disk (94). The third base (91) is mounted on the cabinet. The slotted part (92) is fixedly mounted on the eighth shaft (8). The slotted part (92) is connected to the grooved wheel (93), and the grooved wheel (93) is mounted on the third base (91) to enable the grooved wheel (93) to rotate. The gear position indicator disk (94) is fixedly mounted on the grooved wheel (93), and the gear position indicator disk (94) and the grooved wheel (93) are concentric.

8. The drive device for a dry vacuum on-load tap changer as described in claim 7, characterized in that: A limit switch (95) is provided on the third base (91) to enable the release and fixation between the groove wheel (93) and the third base (91).

Images