CN214256267U - Self-checking safety circuit - Google Patents
Self-checking safety circuit Download PDFInfo
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- CN214256267U CN214256267U CN202021799049.5U CN202021799049U CN214256267U CN 214256267 U CN214256267 U CN 214256267U CN 202021799049 U CN202021799049 U CN 202021799049U CN 214256267 U CN214256267 U CN 214256267U
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Abstract
The utility model discloses a self-checking safety circuit, including the action device, action device series connection has power, first switch and second switch to form the series circuit. The first switch is electrically connected with a first self-checking circuit; the second switch is electrically connected with a second self-checking circuit. The utility model discloses a set up a plurality of switches and effectively solved broken glass ware or the easy mistake of fire extinguisher and bumped the problem that the start-up leads to economic loss, and realized safe quick circuit self-checking.
Description
The technical field is as follows:
the utility model relates to a belong to machinery, especially relate to a self-checking safety circuit.
Background art:
present automatic broken glass ware, fire extinguisher etc. are controlled like the automatic breaker of a window glass that patent 201621103287.1 disclosed and the automatically controlled fire extinguisher etc. that patent 201420590852.6 disclosed gradually through electrical equipment, when the dangerous condition appears, need broken glass or when putting out a fire, press the switch to start broken glass ware or fire extinguisher, thereby start broken glass or put out a fire. But when only setting up a switch, the phenomenon appears the mistake easily and touches, starts broken glass or puts out a fire promptly when there is not dangerous condition promptly, leads to causing economic loss. In addition, the electrified circuit of the automatic glass breaker and the fire extinguisher exists for a long time, so that the problems of aging, electric leakage, poor electrification and the like of the circuit can occur along with the time extension. In particular, the contact points of the lines are more likely to cause problems such as poor contact, forgetting to connect the components when the vehicle inspection lines are disassembled, and the like. But the existing line can not detect whether the line is normal or not quickly under the condition of not starting the automatic glass breaker or the fire extinguisher.
The utility model has the following contents:
an object of the utility model is to provide a self-checking safety circuit, the utility model discloses a set up a plurality of switches and effectively solved broken glass ware or the easy mistake of fire extinguisher and bumped the problem that the start leads to economic loss, and realized safe quick circuit self-checking.
In order to solve the above problem, the technical scheme of the utility model is that:
a self-checking safety circuit comprises an action device, wherein the action device is connected with a power supply, a first switch and a second switch in series to form a series loop.
In a further improvement, the first switch is electrically connected with a first self-checking circuit; the second switch is electrically connected with a second self-checking circuit.
In a further improvement, the first switch and the second switch are both an armature of a first relay and an armature of a second relay respectively; the first self-checking circuit comprises a first relay and a first indicating device which is connected with the first relay in parallel and electrically connected with one end of the power supply; the first relay and the first indicating device are connected in parallel, then are connected with the first button switch in series and then are electrically connected with the other end of the power supply; the second self-checking circuit comprises a second relay and a second indicating device which is connected with the second relay in parallel and electrically connected with one end of the power supply, and the second relay and the second indicating device are connected with a second button switch in parallel and then electrically connected with the other end of the power supply.
In a further improvement, the first self-test circuit comprises a first relay; the second self-checking circuit comprises a second relay; the first relay and the second relay are both double-armature relays; the first armature of the first relay is a first switch, and the second armature of the first relay is a third switch; the first armature of the second relay is a second switch, and the second armature of the second relay is a fourth switch; the first relay is connected with the first button switch and the power supply in series to form a first loop; the second relay is connected with the second button switch and the power supply in series to form a second loop; the third switch is connected with the first indicating device, the action device, the first switch and the power supply in series to form a third loop; the fourth switch is connected with the second indicating device, the action device, the second switch and the power supply in series to form a fourth loop; the first self-checking circuit comprises a first loop and a third loop; the second self-test circuit includes a second loop and a fourth loop.
In a further improvement, the third switch is connected with the first indicating device, the action device, the first switch and the power supply in series to form a third loop; the fourth switch is connected with the second indicating device, the action device, the second switch and the power supply in series to form a fourth loop; the first self-checking circuit comprises a first loop and a third loop; the second self-test circuit includes a second loop and a fourth loop.
In a further refinement, the first self-test circuit includes a first indicating device disposed in parallel with the first switch; the second self-test circuit includes a second indicating device disposed in parallel with the second switch.
In a further improvement, the first switch and the second switch are both button switches.
In a further improvement, the first indicating device and the second indicating device are LED lamps or buzzers.
In a further improvement, the actuating device is an electric fire extinguisher or an automatic glass breaker.
The utility model has the advantages that:
the utility model discloses a set up a plurality of switches and effectively solved broken glass ware or the easy mistake of fire extinguisher and bumped the problem that the start-up leads to economic loss, and realized safe quick circuit self-checking.
Description of the drawings:
FIG. 1 is a schematic circuit diagram according to embodiment 2;
FIG. 2 is a schematic circuit diagram according to embodiment 3;
fig. 3 is a schematic circuit structure diagram of embodiment 4.
The specific implementation mode is as follows:
as shown in fig. 1, the self-checking safety circuit includes an operating device 1, and a first power supply 2, a first switch 3 and a second switch 4 are connected in series to the operating device 1 to form a series circuit.
Just can start action device 1 like this when closing first switch 3 and second switch 4 simultaneously, carry out broken glass or put out a fire to effectively prevent not having the touching. The action device 1 is an electric fire extinguisher or an automatic glass breaker.
Example 2
The following modifications are made on the basis of example 1:
as shown in fig. 1, the first switch 3 is electrically connected with a first self-checking circuit; the second switch 4 is electrically connected with a second self-checking circuit. The first self-checking circuit comprises a first indicating device 7 arranged in parallel with the first switch 3; the second self-test circuit comprises a second indicating means 9 arranged in parallel with the second switch 4.
The first switch 3 and the second switch 4 are both push-button switches. The first indicator means 7 and the second indicator means 9 are LED lights or buzzers, preferably LED lights.
When the first switch 3 and the second switch 4 are in the on state, the voltage across the two ends of the operating device 1 cannot reach the operating voltage due to the voltage dividing action of the first indicating device 7 and the second indicating device 9, but the first indicating device 7 and the second indicating device 9 operate, for example, when the LED lamp is used, the LED lamp amount is increased. In normal times, when the first switch and the second switch are opened, the first indicating device 7 and the second indicating device 9 indicate that the power supply and the circuit have no problem if the first switch and the second switch are in the running state, and otherwise indicate that the circuit or the power supply has a problem. When self-checking is carried out, the first switch 3 is pressed down firstly, if the first switch 3 has no problem and connection is realized, the first switch 3 short-circuits the first indicating device 7, and the first indicating device 7 is closed. If the first switch 3 has a problem, such as a bad contact, and cannot be turned on, the first indicating device 7 still operates, thereby achieving the effect of detecting whether the first switch 3 has a problem. And similarly, the first switch is turned on, and the second switch is pressed to perform self-checking on the second switch. When the starting is needed, the first switch and the second switch are both pressed, the first indicating device 7 and the second indicating device 9 are both short-circuited, and therefore the voltage at the two ends of the action device 1 is increased to reach the starting voltage for starting.
Example 3
As shown in fig. 2, in order to avoid the first and second indicating devices from being powered on for a long time, the following improvements are made:
the first switch 3 is electrically connected with a first self-checking circuit; the second switch 4 is electrically connected with a second self-checking circuit. The first switch 3 and the second switch 4 are both an armature of a first relay 5 and an armature of a second relay 6 respectively; the first self-checking circuit comprises a first relay 5 and a first indicating device 7 connected in parallel with a second relay 6 and electrically connected with one end of the power supply 2; the first relay 5 and the first indicating device 7 are connected in parallel, then are connected with the first button switch 8 in series and then are electrically connected with the other end of the power supply 2; the second self-checking circuit comprises a second relay 6 and a second indicating device 9 which is connected with the second relay 6 in parallel and electrically connected with one end of the power supply 2, and the second relay 6 and the second indicating device 9 are connected with a second button switch 10 in series and then connected with the other end of the power supply 2.
Thus, when the first button switch 8 is pressed alone, the first indicating device 7 lights up to indicate that no problem exists in the corresponding line, otherwise, the problem is indicated, and simultaneously, the first relay 5 is started to close the first switch 3. Similarly, when the second button switch 10 is pressed alone, the second indicating device 9 is on, which indicates that there is no problem with the corresponding line, otherwise, which indicates that there is a problem, and the second relay 6 is activated to turn off the second switch 4. The first push switch 8 and the second push switch 10 are simultaneously pushed, and both the first switch and the second switch are turned off, so that the closed-loop starting operation device 1 is formed.
Example 4
As shown in fig. 2, the circuit of embodiment 3 makes some lines at both ends of the operation device 1 undetectable, resulting in incomplete self-test. As shown in fig. 3, the following improvements are made to overcome the defects: the first self-test circuit includes a first relay 5; the second self-test circuit includes a second relay 6; the first relay 5 and the second relay 6 are both double-armature relays; wherein, the first armature of the first relay 5 is the first switch 3, and the second armature of the first relay 5 is the third switch 11; the first armature of the second relay 6 is the second switch 4, and the second armature of the second relay 6 is the fourth switch 12; the first relay 5 is connected with the first button switch 8 and the power supply 2 in series to form a first loop; the second relay 6 is connected with the second button switch 10 and the power supply 2 in series to form a second loop; the third switch 11 is connected with the first indicating device 7, the action device 1, the first switch 3 and the power supply 2 in series to form a third loop; the fourth switch 12 is connected with the second indicating device 9, the action device 1, the second switch 4 and the power supply 2 in series to form a fourth loop; the first self-checking circuit comprises a first loop and a third loop; the second self-test circuit includes a second loop and a fourth loop.
In the self-test, the first button switch 8 is pressed to energize the first circuit, the first relay 5 is operated to close the first switch 3 and the third switch 11, and the third circuit is energized. However, the first indicating device 7 shares a part of voltage with the action device 1 in series, so that the action device 1 cannot reach the starting voltage and cannot be started, the first indicating device 7 is turned on or gives an alarm to indicate that the first loop and the third loop have no problems, otherwise, the first indicating device 7 indicates that the problems exist and needs to be checked. Then the first button switch 8 is released, the second button switch 10 is pressed, the second loop is switched on and off, the second relay 6 acts, the second switch and the fourth switch are switched off, and the fourth loop is electrified. Also, the second indicator means divides the voltage, so that the actuation device 1 cannot reach the actuation voltage and cannot be actuated. And whether the circuit is normal or not is detected by whether the second indicating device acts or not. When the first button switch 8 and the second button switch 10 are pressed simultaneously, as shown in fig. 3, the two ends of the actuating device 1 are directly electrically connected to the power supply, and no component is used to shunt the voltage, so that the voltage at the two ends of the actuating device 1 reaches the actuating voltage, and the actuating device 1 is started.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A self-checking safety circuit is characterized by comprising an action device (1), wherein the action device (1) is connected with a power supply (2), a first switch (3) and a second switch (4) in series to form a series circuit; the first switch (3) is electrically connected with a first self-checking circuit; the second switch (4) is electrically connected with a second self-checking circuit.
2. The self-test safety circuit according to claim 1, characterized in that said first switch (3) and second switch (4) are both an armature of a first relay (5) and an armature of a second relay (6), respectively; the first self-checking circuit comprises a first relay (5) and a first indicating device (7) which is connected with the second relay (6) in parallel and is electrically connected with one end of the power supply (2); the first relay (5) and the first indicating device (7) are connected in parallel, then are connected with the first button switch (8) in series and then are electrically connected with the other end of the power supply (2); the second self-checking circuit comprises a second relay (6) and a second indicating device (9) which is connected with the second relay (6) in parallel and electrically connected with one end of the power supply (2), and the second relay (6) and the second indicating device (9) are connected in parallel and then are connected with a second button switch (10) in series and then are electrically connected with the other end of the power supply (2).
3. Self-test safety circuit according to claim 1, characterized in that said first self-test circuit comprises a first relay (5); the second self-checking circuit comprises a second relay (6); the first relay (5) and the second relay (6) are both double-armature relays; wherein a first armature of the first relay (5) is a first switch (3), and a second armature of the first relay (5) is a third switch (11); a first armature of the second relay (6) is a second switch (4), and a second armature of the second relay (6) is a fourth switch (12); the first relay (5) is connected with the first button switch (8) and the power supply (2) in series to form a first loop; the second relay (6) is connected with the second button switch (10) and the power supply (2) in series to form a second loop; the third switch (11) is connected with the first indicating device (7), the first switch (3) and the power supply (2) in series to form a third loop; the fourth switch (12) is connected with the second indicating device (9), the second switch (4) and the power supply (2) in series to form a fourth loop; the first self-checking circuit comprises a first loop and a third loop; the second self-test circuit includes a second loop and a fourth loop.
4. A self-test safety circuit according to claim 3, wherein the third switch (11) connects the first indicating means (7), the action means (1), the first switch (3) and the power source (2) in series to form a third loop; the fourth switch (12) is connected with the second indicating device (9), the action device (1), the second switch (4) and the power supply (2) in series to form a fourth loop; the first self-checking circuit comprises a first loop and a third loop; the second self-test circuit includes a second loop and a fourth loop.
5. Self-test safety circuit according to claim 1, characterized in that said first self-test circuit comprises first indicating means (7) arranged in parallel with the first switch (3); the second self-test circuit comprises a second indicating device (9) arranged in parallel with the second switch (4).
6. Self-checking safety circuit according to claim 5, characterized in that said first switch (3) and second switch (4) are both push-button switches.
7. Self-checking safety circuit according to any one of claims 2 to 6, characterized in that said first (7) and second (9) indicating means are LED lights or buzzers or displays.
8. Self-checking safety circuit according to any one of claims 1 to 6, characterized in that said actuating means (1) is an electric fire extinguisher or an automatic glass breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021799049.5U CN214256267U (en) | 2020-08-25 | 2020-08-25 | Self-checking safety circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021799049.5U CN214256267U (en) | 2020-08-25 | 2020-08-25 | Self-checking safety circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214256267U true CN214256267U (en) | 2021-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021799049.5U Active CN214256267U (en) | 2020-08-25 | 2020-08-25 | Self-checking safety circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214256267U (en) |
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2020
- 2020-08-25 CN CN202021799049.5U patent/CN214256267U/en active Active
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