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Automatic switch-off mechanism

A technology of automatic disconnection and switching, which is applied to the power device, electric switch, contact operating mechanism and other directions inside the switch, which can solve the problems of inverter burnout, fire, and increase the safety risk of operators, so as to reduce the space , Improve the effect of security

Pending Publication Date: 2020-03-31
BEIJING GUANGHUA SHITONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the knob-type isolating switches currently used in the market are basically operated manually. After a fault is found, the operator needs to manually disconnect the switch, which undoubtedly increases the safety risk of the operator.
At the same time, it cannot automatically and quickly disconnect when encountering problems, which can easily cause inverter burnout and fire, which seriously threatens the safe operation of photovoltaic power plants.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] combined with figure 1 , 2 , 6-9, a switch automatic disconnection mechanism, including a housing 1, the interior of the housing 1 is hollow, and the housing 1 is provided with a main shaft 2, a cam 3 sleeved on the main shaft 2, a sleeve The rotating ratchet 4 arranged on the main shaft 2, the torsion spring 5 sleeved on the main shaft 2, the control ratchet 6 cooperating with the rotating ratchet 4, and the limit mechanism 1.3 for limiting the rotation range of the cam 3, the The main shaft 2 runs through the housing 1 and is integrated with the switch shaft. The cam 3 is fixedly connected to the main shaft 2. A guide pin 3.1 is provided on one end surface of the cam 3. The rotating ratchet 4 is arranged on the cam 3. One side of the guide pin 3.1 is provided and matched with the hole of the main shaft 2, and the torsion spring 5 is arranged on one side of the rotating ratchet 4 so that the torsion spring 5 is in a tightened state when the main shaft 2 rotates clockw...

Embodiment 2

[0036] combined with figure 1 , 3 , 7-9, compared with Embodiment 1, the difference between this embodiment and Embodiment 1 is:

[0037] The limiting mechanism 1.3 is a brake shrapnel 1.31, one end of the torsion spring 5 is connected to the housing and the other end is fixedly connected to the cam 3, the main shaft 2 is fixedly connected to the rotating ratchet 4 pins, the The reset mechanism 7 is a reset spring 7.3, and the trigger mechanism 8 is an impact electromagnet 8.7.

Embodiment 3

[0039] combined with figure 1 , 4 , 7-9, compared with Embodiment 1, the difference between this embodiment and Embodiment 1 is:

[0040] The limiting mechanism 1.3 is an oblong protrusion 1.31, the main shaft 2 is gear-connected to the rotating ratchet 4, one end of the torsion spring 5 is connected to the housing and the other end is fixedly connected to the main shaft 2, The reset mechanism 7 is a reset spring 7.3. The trigger mechanism 8 includes a motor 8.1, a trigger cam 8.2 connected to the motor 8.1, and a push rod 8.3 matched with the trigger cam 8.2. The frame 8.5 of the rod 8.3, the frame 8.5 is fixedly connected to the housing 1, and the trigger spring 8.4 sleeved on the push rod 8.3 is arranged inside, and the micro switch 9 is also provided in the housing 1, The micro switch 9 is arranged on the side of the trigger mechanism 8 close to the locking plate 6.3.

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Abstract

The invention discloses an automatic switch-off mechanism of a switch. which comprises a shell, the interior of the shell is hollow, a main shaft, a cam arranged on the main shaft in a sleeving mode,a rotating ratchet wheel arranged on the main shaft in a sleeving mode, a torsional spring arranged on the main shaft in a sleeving mode, a control ratchet needle matched with the rotating ratchet wheel and a limiting mechanism used for limiting the rotating range of the cam are arranged in the shell. According to the automatic disconnection mechanism, when an inverter circuit system encounters special working conditions such as overload and short circuit, remote disconnection of an inverter system loop can be completed without manual operation, accidents such as inverter burnout caused by circuit overload and short circuit are avoided, and the safety guarantee of operators is improved. The automatic disconnecting mechanism and the photovoltaic switch are installed together to serve as anautomatic disconnecting system of the photovoltaic switch, a main shaft of the automatic disconnecting mechanism and a main shaft of the switch are integrally designed, and space is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of circuit protection, in particular to a switch automatic disconnection mechanism. Background technique [0002] With the extensive construction of power systems in China, the safety of power systems has gradually attracted the attention of the general public and has become a hot issue in the industry in recent years. In particular, DC switches are used in inverters to control the working status of multiple core components. The reliability of DC switches is not only related to the good operation of the entire power system, but also to the stable development of the power industry. [0003] Looking back on the development of the photovoltaic industry in the past few years, the industry has gradually formulated standards for the use of photovoltaic switches. Major manufacturers have also been researching to enhance the arc extinguishing ability of switch contacts and the speed of switch disconnection. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/02H01H33/28
CPCH01H33/02H01H33/28H01H3/3042H01H3/3031H01H3/30H01H33/40H01H9/20H01H2300/018
Inventor 王刚
Owner BEIJING GUANGHUA SHITONG TECH
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