Multifunction safety knife switch
A safety gate and multi-functional technology, which is applied in the field of multi-functional safety switch blades, can solve the problems of no safety locking mechanism and potential safety hazards.
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Embodiment 1
[0026] As shown in Figure 1: This embodiment consists of a power supply system circuit, a zero-crossing pulse sampling circuit, an on-off instruction recognition and control circuit, a variety of protection function circuits, a counting control circuit and arc suppression, an operation control circuit and a shutdown control circuit. circuit and inspection lock circuit.
[0027] The power supply system circuit consists of B, Q 1 、C 1 , IC 1 、C 2 ,LED 1 , RH form the power supply circuit of the whole machine. The alternating current is stepped down by the transformer B and passed through the full bridge Q 1 Complete the full-wave rectification process, output DC voltage, through C 1 Filtered and sent to IC 1 The stable voltage output stable DC power supply (+6V) is sent to each circuit. IC 1 It is a three-terminal regulator integrated circuit, LED 1 The luminous tube indicates the working status of the power supply system.
[0028] The zero-crossing pulse sampling cir...
Embodiment 2
[0039] In this embodiment, on the basis of the structure of Embodiment 1, the identification mode of the opening and closing command identification and the control circuit is designed as an infrared light control mode, as shown in Figure 2: it uses a concave infrared optical coupling device GH 1 、GH 2 As an identification element, when the barrier is inserted into the groove, D 1 、D 4 Output high potential respectively; when there is no obstacle in the groove, D 1 、D 4 Output low potential respectively. This embodiment is to use the blocking of infrared light to control GH 1 、GH 2 The output potential of the switch to control the opening and closing of the knife. GH 1 It is the opening control, and the GH needs to be pulled out when the knife is turned off. 1 The barrier in the groove makes D 1 Potential changes from high to low, IC 2 Pin 11 of the pin becomes low level at the same time, thereby releasing the IC 2 In the locked state, the zero-crossing pulse is sent...
Embodiment 3
[0042] In this embodiment, on the basis of the structure of Embodiment 1, the identification mode of its on-off command identification and control circuit is designed as a radio wave control mode, as shown in Figure 3: it uses a radio transmitter and a receiver as identification Components to control the opening and closing of the knife. When the switch knife is turned on, the radio wave sent by the radio transmitter makes the radio receiver send a command signal to make D 1 Potential changes from high to low, IC 2 Pin 11 of the pin becomes low level at the same time, thereby releasing the IC 2 In the locked state, the zero-crossing pulse is sent to the IC 2 The 10 pins enable the IC 2 Start counting, when the count reaches the set value, IC 2 Pin 2 outputs a high level pulse to the IC 4 1 pin, its 4 pin output high level makes T 2 Turn on GY 2 Work. closed KS 2 、KS 3 control pole. Make KS 2 、KS 3 Conducting the AC power output to the load to complete the start of...
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