Tap switch and equipped electric mechanism mechanical limiting device thereof
A technology of mechanical limit device and tap changer, which is applied in the direction of contact drive mechanism, circuit, inductor, etc., can solve the problems of troublesome on-site adjustment, complicated structure, and many parts, and achieves easy implementation, reasonable structure design, The effect of high reliability
Pending Publication Date: 2021-11-12
ZHEJIANG TENGLONG ELECTRICAL APP
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Problems solved by technology
The mechanical limit device can block the output shaft so that it cannot rotate when the electrical limit of the electric mechanism fails, so as to avoid the operation of exceeding the limit gear in the electric tap changer; however, the structure of this device is complex and there are many related parts , It is troublesome to adjust on site after installation
Method used
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Embodiment
[0025] In this embodiment, the cam 202 includes an A cam piece 2021 and a B cam piece 2022, and the angle of the A cam piece 2021 and the B cam piece 2022 can be adjusted relative to the camshaft 201; the A cam piece 2021 and the B cam piece 2022 When the tap changer is in the initial gear and the last gear, respectively, the stop pin 101 is advanced to cooperate with the limit concave wheel 4 to form a limit. The cam 202 adopts the structure of two cam pieces, which is convenient for fine-tuning during on-site installation, so as to effectively reduce assembly errors; in addition, the two cam pieces can form any angle, so that it can be applied to the tap changer motor mechanism of different standards. high sex.
[0026]In this embodiment, the cam shaft 201 is provided with a cam seat 206 , and the cam 202 is fixed on the cam shaft 201 through the cam seat 206 . At this time, the connection between the cam 202 and the camshaft 201 is relatively firm, so that during the rotat...
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The invention provides a tap switch, which comprises an electric mechanism, which comprises a mechanical limiting device, wherein the mechanical limiting device comprises a stop needle assembly and a cam assembly, the stop needle assembly comprises a stop needle, the inner end of the stop needle is inserted into a guide hole in a main shaft box to form a sliding pair, a rolling piece is arranged at the outer end, a compression spring for resetting is sleeved on the stop needle in the guide hole, in the main shaft box, a limiting concave wheel matched with the stop needle is arranged on a main shaft, the cam assembly comprises a cam shaft matched with a bearing seat to form a rotation pair, a cam and a transmission piece A are arranged at the two ends of the cam shaft respectively, the cam is in transmission fit with the stop needle, the transmission piece A is in transmission fit with a transmission piece B linked with a gear disc, and after the gear disc rotates to an initial gear and a tail gear, the cam pushes the stop needle to be matched with the limiting concave wheel to form limiting and prevent the main shaft from rotating, so that the operation of exceeding the initial gear and the tail gear during electric tapping conversion is avoided. Correspondingly, the invention further provides an electric mechanism mechanical limiting device.
Description
technical field [0001] The invention relates to the technical field of tap changers, in particular to a tap changer and a mechanical limit device for an electric mechanism equipped with the tap changer. Background technique [0002] Transformer voltage regulation is to change the number of turns of the coil by adjusting the tap of the coil (usually a high-voltage coil) on one side of the transformer through a tap changer to achieve the purpose of changing the output voltage. The motor mechanism is a device that controls the tap changer to adjust the winding position of the power transformer to change the output voltage. In the step-by-step shifting process of the tap changer driven by the electric mechanism, in order to run safely, there is generally a limit gear limit device in the electric mechanism to ensure that the tap changer does not exceed the limit gear (that is, the beginning and end gears). In addition to the electronic limit protection device in the existing ele...
Claims
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IPC IPC(8): H01H3/42H01F29/04
CPCH01H3/42H01F29/04
Inventor 叶为民章宏仁叶韩超陈宣
Owner ZHEJIANG TENGLONG ELECTRICAL APP