CN117153594A

CN117153594A - Split tap switch

Info

Publication number: CN117153594A
Application number: CN202311279038.2A
Authority: CN
Inventors: 张强; 柳强; 王鑫; 柳彤; 邓国亮; 赵君伟
Original assignee: State Grid Sichuan Electric Power Co Ltd
Current assignee: State Grid Sichuan Electric Power Co Ltd
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2023-12-01

Abstract

The application relates to a split tap changer, which relates to the field of electric elements and comprises a change-over switch, a tap selector, a first cavity, a second cavity, a linkage assembly and a signal feedback assembly, wherein the first cavity is connected with the first cavity; the change-over switch is arranged in the first cavity, and the tapping selector is arranged in the second cavity; the signal feedback assembly includes a switching signal feedback component mounted on the first chamber and a tap signal feedback component mounted on the second chamber. The application has the effect of ensuring that the tap switch operates in normal sequence.

Description

Split tap switch

Technical Field

The application relates to the field of electrical elements, in particular to a split tap switch.

Background

The on-load tap changer comprises a change-over switch and a tap selector; the switch is usually under the upper and the lower tapping selector, and the middle of the switch and the tapping selector is mechanically connected by a columnar connecting column to realize synchronization.

The tap changer is used for tap changing and connection of a coil device. At present, the split tap changer has gained acceptance in the market and is being gradually popularized.

In the related art, the tap changer is divided into two parts due to a split type structure, and external transmission is required to realize synchronous operation (the conventional integrated type realizes synchronous operation by an internal structure). The external transmission will be disturbed by the external environment, and there is a risk of transmission failure, resulting in unsynchronized parts of the switch that are separated, ultimately affecting the operational safety.

Therefore, in order to improve the reliability of the split tap changer, a signal feedback device is added to both the separated parts, and signals are simultaneously sent out in the transmission process, so that the switch acts under the condition of ensuring the normal sequence. To this end, the applicant provides a split tap changer.

Disclosure of Invention

The application provides a split tap switch in order to ensure the synchronization of a change-over switch and a tap selector of the split tap switch.

The split tap switch provided by the application adopts the following technical scheme:

a split tapping switch comprises a change-over switch, a tapping selector, a first cavity, a second cavity, a linkage assembly and a signal feedback assembly; the change-over switch is arranged in the first cavity, and the tapping selector is arranged in the second cavity; the signal feedback assembly includes a switching signal feedback component mounted on the first chamber and a tap signal feedback component mounted on the second chamber.

Through adopting above-mentioned technical scheme, install switching signal feedback part and tapping signal feedback part respectively above change over switch and tapping selector, through receiving the switching signal of contrast change over switch and tapping selector, carry out the check-up control to the synchronous rate of change over switch and tapping selector, effectively prevent the switch trouble that mechanical transmission trouble caused, help in time finding the switch problem, in time maintain, improve tapping switch's reliability.

Optionally, the linkage assembly comprises a first worm gear box, a second worm gear box and a transmission shaft, wherein the transmission shaft is arranged among the electric mechanism, the first worm gear box and the second worm gear box to realize linkage of the three; the first worm gear box is arranged on the change-over switch, and a worm gear of the first worm gear box is coaxially fixed with a driving shaft in the change-over switch; the second worm gear box is arranged on the tapping selector, and a worm gear of the second worm gear box is coaxially fixed with a driving shaft of the tapping selector.

Through adopting above-mentioned technical scheme, utilize first worm wheel box, second worm wheel box and transmission shaft to realize the linkage of change over switch and tapping selector, linkage structure reliability is better, is difficult for taking place the asynchronous of change over switch and tapping selector.

Optionally, the switching signal feedback component comprises a linkage disc, a trigger head and a signal trigger; the linkage disc is coaxially fixed with a worm wheel in the first worm wheel box, the trigger head is fixed on the periphery of the linkage disc, the signal trigger is positioned on the rotating track of the trigger head, and the trigger head can trigger the signal trigger once when rotating through the signal trigger.

Through adopting above-mentioned technical scheme, the gangway follows worm wheel and change over switch interior main shaft and carries out synchronous rotation, triggers signal trigger through the trigger head of fixing at the gangway week side, turns into intermittent gear signal with continuous rotation, more is fit for tapping switch's actual operating mode.

Optionally, two trigger heads are arranged on the periphery of the linkage disc, and the rotation centers of the two trigger heads and the linkage disc are positioned on the same straight line.

By adopting the technical scheme, the actual switching state of the switch is further provided, two trigger heads are arranged, the linkage disc rotates for one circle, and the signal trigger is triggered twice.

Optionally, the linkage disc and the trigger head are integrally provided with a cam, and the signal trigger is a micro switch.

Through adopting above-mentioned technical scheme, use simple cam structure to change continuous rotation action into intermittent gear signal, the structure is more reliable and stable.

Optionally, the trigger head is a cylindrical deflector rod rotatably mounted on the linkage disc, and the rotation axis of the trigger head is parallel to the rotation axis of the linkage disc.

Through adopting above-mentioned technical scheme, rotate the cylindric driving lever of installation, when stirring signal trigger, stir the action comparatively smooth, less to mechanical structure's damage, the structure is comparatively reliable.

Optionally, the linkage disc is a circular turntable; the switching signal feedback component further comprises a gear shifting disc, a reduction gear set and a gear display disc, a plurality of U-shaped shifting grooves are uniformly formed in the periphery of the gear shifting disc and correspond to the trigger head, circular-arc-shaped limiting grooves are formed in the side wall of the gear shifting disc between the shifting grooves, the radius of each limiting groove is identical to that of each linkage disc, and the linkage discs are embedded in the limiting grooves; the reduction gear set is arranged between the gear shifting disc and the gear display disc.

By adopting the technical scheme, the mechanical gear display of the electronic signal detection box is performed simultaneously, so that a worker can find a reference when performing on-site maintenance, and the equipment maintenance is facilitated.

Optionally, the signal trigger is provided with a plurality of signal triggers along the rotation track of the trigger head.

By adopting the technical scheme, the motion trail of the trigger head can be more accurately detected by arranging the plurality of signal triggers, so that the out-of-sync condition caused by the problem of mechanical structural design can be accurately judged.

Optionally, the trigger heads are two and are symmetrically arranged about the center of the rotation shaft of the linkage disc; the signal triggers are three, the three signal triggers are uniformly distributed along the circumferential direction of the linkage disc, and the central angle between the two signal triggers about the rotation center of the linkage disc is 90 degrees; when the linkage disc is in a static state, the two trigger heads are respectively pressed on the two trigger heads.

Through adopting above-mentioned technical scheme, in the gangway switching motion in-process, set up a signal trigger respectively in starting point, central point, the terminal point of trigger head motion for detect the motion state of trigger head, the whole journey motion of control trigger head that can be comparatively accurate, and then better contrast change over switch and tapping selector's motion synchronous rate in first cavity and the second cavity, the problem of finding tapping switch operation in-process more easily, better guarantee tapping switch operation's stability.

In summary, the application at least comprises the following beneficial technical effects:

1. according to the split tap changer disclosed by the application, the switching signal feedback component and the tap signal feedback component are respectively arranged on the separated switching switch and tap selector, so that a gear switching signal is converted into an electric signal to be output, the switching signals of the two parts are compared, the switching synchronization condition of the two parts can be monitored in real time through electronic equipment, further, the running fault is found in time for maintenance, and the running reliability of the equipment is ensured;

2. the trigger head is used for converting mechanical motion into an electric signal through the trigger signal trigger so as to check the synchronous condition of the tapping selector and the change-over switch by comparing the trigger time of the switching signal feedback component and the tapping signal feedback component;

3. through setting up shift plate, reduction gear group and gear display disc in one side of linkage disc to set up the trigger head into the groove matched with rotation cylinder driving lever of dialling on the shift plate, turn into the gear demonstration of machinery with the rotation of trigger head, make things convenient for on-the-spot maintenance personnel to proofread the synchronous error of change over switch and tapping selector.

Drawings

FIG. 1 is a schematic overall structure of an embodiment of the present application;

FIG. 2 is a schematic diagram of a switching signal feedback unit according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a transmission structure of a signal feedback device according to an embodiment of the present application;

fig. 4 is a schematic diagram of a transmission structure of the signal feedback component in the embodiment of the application.

Reference numerals: 1. an electric mechanism; 2. a change-over switch; 3. a tap selector; 4. a first chamber; 5. a second chamber; 6. a linkage assembly; 61. a bevel gear box; 62. a first worm wheel box; 63. a second worm wheel box; 64. a transmission shaft; 65. a case body; 66. a worm; 67. a worm wheel; 68. a worm wheel shaft; 71. a switching signal feedback section; 72. a tap signal feedback component; 73. a linkage disc; 74. a trigger head; 75. a signal trigger; 76. a shift plate; 761. a groove is arranged; 762. a limit groove; 77. a reduction gear set; 78. a gear display panel; 79. a protective cover; 791. and (5) observing the hole.

Detailed Description

The application is described in further detail below with reference to fig. 1-4.

The embodiment of the application discloses a split tap changer, which comprises an electric mechanism 1, a change-over switch 2, a tap selector 3, a first chamber 4, a second chamber 5, a linkage assembly 6 and a signal feedback assembly, and is disclosed in the embodiment of the application.

The first chamber 4 and the second chamber 5 are two independent chambers, the second chamber 5 is an oil tank part of the transformer, and the first chamber 4 is an externally hung box body on the transformer. The diverter switch 2 is placed in a first chamber 4 and the tap selector 3 is placed in a second chamber 5. The electric mechanism 1 is disposed outside the first chamber 4 and the second chamber 5, and the electric mechanism 1 is fixed to a side wall of the first chamber 4.

The linkage assembly 6 includes a bevel gear box 61, a first worm gear 67 box 62, a second worm gear 67 box 63, and a drive shaft 64. The bevel gear box 61 is arranged above the electric mechanism 1 and between the electric mechanism 1 and the first worm gear 67 box 62 for transmission steering of the transmission shaft 64; the first worm gear 67 box 62 is arranged at the top of the change-over switch 2, and the vertical shaft of the first worm gear 67 box 62 is coaxially fixed with the central driving shaft of the change-over switch 2; the second worm gear 67 box 63 is arranged at the top of the tapping selector 3, and the vertical shaft of the second worm gear 67 box 63 is coaxially fixed with the central driving shaft of the tapping selector 3; synchronous linkage is realized between the bevel gear and the transverse shaft of the first worm gear 67 box 62 and between the transverse shafts of the first worm gear 67 box 62 and the second worm gear 67 box 63 through the connection of the transmission shaft 64; the drive shaft 64 is a polygonal prism shaft.

Referring to fig. 1, the signal feedback assembly includes a switching signal feedback section 71 and a tap signal feedback section 72.

The first worm gear 67 box 62 is identical in structure to the second worm gear 67 box 63. Referring to fig. 2, the worm wheel 67 case includes a case 65, a worm 66 rotatably installed in the case 65, a worm wheel 67, and a worm wheel 67 shaft coaxially connecting the worm wheel 67 and the apparatus rotation shaft, the worm wheel 67 shaft being rotatably installed in the case 65, the worm 66 being coaxially fixed to the worm wheel 67 shaft. The worm gear 67 is coaxially fixed to the drive shaft of the lower selector switch 2 or the tap selector 3.

The switching signal feedback section 71 has the same structure as the tap signal feedback section 72. Referring to fig. 2, the signal feedback part includes a linkage disc 73 rotatably installed at the top of the box body 65, a trigger head 74 disposed at the peripheral side of the linkage disc 73, and a signal trigger 75 triggered by the trigger head 74, wherein a rotation shaft of the linkage disc 73 passes through the box body 65 downwards to be inserted on the worm gear 67 shaft, and the insertion joint is in a shape of a straight line to realize coaxial fixation; the two trigger heads 74 are arranged along the periphery of the linkage disc 73, and the rotation centers of the two trigger heads 74 and the linkage disc 73 are positioned on the same straight line; the signal trigger 75 is a micro switch. The signal feedback component has two setting modes:

first, referring to fig. 3, the linkage disc 73 is a circular turntable; the trigger head 74 is a cylindrical deflector rod rotatably mounted on the linkage disc 73, two connecting plate bodies extend from the upper lateral edge of the linkage disc 73, and the trigger head 74 is rotatably mounted on the connecting plate bodies; the rotation axis of the trigger head 74 is parallel to the rotation axis of the link plate 73. The mode also comprises a protective cover 79, a gear shifting disc 76, a speed reducing gear set 77 and a gear display disc 78, and gear information is displayed on the equipment through mechanical transmission; a plurality of U-shaped poking grooves 761 are uniformly formed in the periphery of the shift disc 76 and correspond to the trigger heads 74, and the trigger heads 74 penetrate into the poking grooves 761 when passing through the shift disc 76 to drive the shift disc 76 to rotate for a certain angle and then leave the poking grooves 761; a circular arc-shaped limit groove 762 is formed in the side wall of the gear shifting disc 76 between the shifting grooves 761, the radius of the limit groove 762 is the same as that of the linkage disc 73, and when the linkage disc 73 does not act, the linkage disc 73 is embedded in the limit groove 762, so that misoperation of the gear shifting disc 76 is prevented; the reduction gear set 77 is provided between the shift plate 76 and the gear position display plate 78, reducing the rotation angle of the gear position display plate 78 so as to display all the gears within one revolution of the gear position display plate 78.

Second, referring to fig. 4, the linkage disc 73 and the trigger head 74 are integrally provided as one cam member, and a signal is generated when the cam bump passes through the micro switch.

Referring to fig. 3 or fig. 4, in particular, 3 signal triggers 75 are uniformly arranged along the circumferential direction of the linkage disc 73, the signal triggers 75 are all located on the rotation track of the trigger head 74, and an included angle between adjacent signal triggers 75 is 90 degrees relative to the rotation center of the linkage disc 73; the 3 signal triggers 75 are sequentially located at the start point, the center point and the end point of the rotation track of the trigger head 74, and when the gear switching is finished and the switching main shaft of the change-over switch 2 or the tapping selector 3 is in a static state, namely the linkage disc 73 is in a static state, the two trigger heads 74 on the linkage disc 73 just correspond to the two signal triggers 75 at the start point and the end point.

The embodiment of the application discloses a split tap switch, which is implemented by the following principle: signal feedback devices are added to the separated diverter switch 2 and the tapping selector 3, and signals are sent out simultaneously in the switching process, so that the switch acts under the condition of ensuring normal sequence. The signal feedback component is arranged on a worm gear 67 box at the top of the switch, and the power level is input and then is output downwards through the worm gear 67 box. The signal box uses the worm gear 67 as power to drive the linkage disc 73 and the trigger head 74 upwards, the trigger head 74 triggers the micro switch to send out in-place signals, and then 2 groups of signals are summarized to the controller for comparison, so that normal operation is ensured. By setting at the start, center and end of the trigger head 74

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. A split tap changer, characterized in that: the device comprises a change-over switch (2), a tapping selector (3), a first chamber (4), a second chamber (5), a linkage assembly (6) and a signal feedback assembly; the change-over switch (2) is arranged in the first chamber (4), and the tapping selector (3) is arranged in the second chamber (5); the signal feedback assembly comprises a switching signal feedback component (71) mounted on the first chamber (4) and a tapping signal feedback component (72) mounted on the second chamber (5).

2. The split tap changer of claim 1, wherein: the linkage assembly (6) comprises a first worm wheel (67) box (62), a second worm wheel (67) box (63) and a transmission shaft (64), wherein the transmission shaft (64) is arranged among the electric mechanism (1), the first worm wheel (67) box (62) and the second worm wheel (67) box (63) to realize linkage of the three; the first worm wheel (67) box (62) is arranged on the change-over switch (2), and the worm wheel (67) of the first worm wheel (67) box (62) is coaxially fixed with a driving shaft in the change-over switch (2); the second worm wheel (67) box (63) is arranged on the tapping selector (3), and the worm wheel (67) of the second worm wheel (67) box (63) is coaxially fixed with the driving shaft of the tapping selector (3).

3. A split tap changer according to claim 2, wherein: the switching signal feedback component (71) comprises a linkage disc (73), a trigger head (74) and a signal trigger (75); the linkage disc (73) is coaxially fixed with the worm wheel (67) in the first worm wheel (67) box (62), the trigger head (74) is fixed on the periphery of the linkage disc (73), the signal trigger (75) is located on the rotation track of the trigger head (74), and the trigger head (74) triggers the signal trigger (75) once when rotating through the signal trigger (75).

4. A split tap changer according to claim 3, wherein: two trigger heads (74) are arranged on the periphery of the linkage disc (73), and the rotation centers of the two trigger heads (74) and the linkage disc (73) are located on the same straight line.

5. A split tap changer according to claim 3 or 4, wherein: the linkage disc (73) and the trigger head (74) are integrally arranged cams, and the signal trigger (75) is a micro switch.

6. A split tap changer according to claim 3 or 4, wherein: the trigger head (74) is a cylindrical deflector rod rotatably mounted on the linkage disc (73), and the rotation axis of the trigger head (74) is parallel to the rotation axis of the linkage disc (73).

7. The split tap changer of claim 6, wherein: the linkage disc (73) is a round turntable; the switching signal feedback component (71) further comprises a shifting disc (76), a reduction gear set (77) and a gear display disc (78), a plurality of U-shaped shifting grooves (761) are uniformly formed in the periphery of the shifting disc (76) corresponding to the trigger head (74), circular arc-shaped limit grooves (762) are formed in the side walls of the shifting disc (76) between the shifting grooves (761), the radius of the limit grooves (762) is the same as that of the linkage disc (73), and the linkage disc (73) is embedded in the limit grooves (762); the reduction gear set (77) is disposed between the shift plate (76) and the gear display plate (78).

8. A split tap changer according to claim 3, wherein: the signal trigger (75) is provided with a plurality of signal triggers along the rotation track of the trigger head (74).

9. The split tap changer of claim 8, wherein: the trigger heads (74) are arranged in two and are symmetrically arranged about the center of the rotation shaft of the linkage disc (73); the signal triggers (75) are three, the three signal triggers (75) are uniformly distributed along the circumferential direction of the linkage disc (73), and the central angle between the two signal triggers (75) relative to the rotation center of the linkage disc (73) is 90 degrees; when the linkage disc (73) is in a static state, two trigger heads (74) are respectively pressed on two signal triggers (75).