Novel dedusting emergency electrical control system

Abstract

The utility model discloses a novel dedusting emergency electrical control system comprising a control circuit, the control circuit comprises a first branch line and a second branch line which are connected in parallel between a live line L and a null line N of an AC power supply, a button SB1 and a time relay KT1 which are sequentially connected in series on the first branch line from the live line L to the null line N, a KT1 normally open contact is arranged on the second branch line, and a KT1 normally open contact is arranged on the second branch line. Three first to third sub-lines which are arranged in parallel are lapped on the second branch line between the output end of the normally open contact of the KT1 and the N end of the null line, three KA1-3 intermediate relays are respectively arranged on the first to third sub-lines, an execution circuit is lapped on the L end of the live line of the second branch line, and the execution circuit comprises first to third execution lines which are connected in parallel. The first execution line comprises a KA1 normally open contact and a carbon dioxide fire extinguishing electromagnetic valve control chip, the second execution line comprises a KA2 relay right position closed contact and a fire-fighting exhaust valve control chip, and the third execution line comprises a KA3 relay left position closed contact and an air return valve control chip.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal systems, in particular to a novel dust removal emergency electrical control system. Background Art

[0002] A large amount of dust is generated in the daily production of factory buildings, so dust removal systems are introduced. Dust removal systems are generally composed of pipe networks, dust removal equipment and fans. Multiple dust removal areas are set up in the factory building. The input and output ends of the pipe network are connected in parallel with multiple dust removal areas. The fan generates suction to suck the dust-containing air from the dust removal area into the pipe network and transport it to the dust removal equipment for filtration. The dust-removed air is then discharged back to the factory building from the output end of the pipe network.

[0003] At the same time, in order to prevent the smoke and flames in the factory from entering the dust removal system due to the chimney effect when a fire occurs in the factory, thereby causing internal damage to the dust removal system or even complete scrapping, the dust removal system will be equipped with an emergency electrical control system. The existing emergency electrical control system is generally connected to a smoke exhaust pipe at the front section of the pipe network output end, and a fire exhaust valve and a return air valve are respectively provided at the input end of the smoke exhaust pipe and the pipe network connected to the smoke exhaust pipe. The dust removal equipment will also be connected to a carbon dioxide fire extinguishing device, and a solenoid valve is provided at the output end of the carbon dioxide fire extinguishing device. The emergency electrical control system has two starting methods, one of which is to sense the fire in the factory through a sensor built into the dust removal system and connected to the emergency electrical control system signal, and then start it; the other is to manually press a button set on the emergency electrical control system when a fire is discovered, and this button start method has the risk of the button being accidentally touched. Utility Model Content

[0004] The purpose of the utility model is to provide a novel dust removal emergency electrical control system to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the present utility model provides the following technical solution: a novel dust removal emergency electrical control system, including a control circuit. The control circuit includes a first branch line and a second branch line that are connected in parallel between the live wire L and the neutral wire N of an AC power supply. On the first branch line from the live wire L to the neutral wire N, a button SB1 and a time relay KT1 are sequentially connected in series. An NC contact of KT1 is arranged on the second branch line. Between the output end of the NC contact of KT1 and the neutral wire N end of the second branch line, a first sub-line, a second sub-line, and a third sub-line that are connected in parallel are connected to the second branch line. Three KA1-3 intermediate relays are respectively arranged on the first sub-line, the second sub-line, and the third sub-line. The live wire L end of the second branch line is connected to an execution circuit. The execution circuit includes a first execution line, a second execution line, and a third execution line that are connected in parallel. The first execution line includes a KA1 NC contact and a carbon dioxide fire extinguishing solenoid valve control chip. The switch pins of the carbon dioxide fire extinguishing solenoid valve control chip are respectively connected to the KA1 NC contact. The second execution line includes a KA2 relay right-position closed contact and a fire exhaust valve control chip. The switch pins of the fire exhaust valve control chip are respectively connected to the KA2 relay left and right-position contacts. The third execution line includes a KA3 relay left-position closed contact and a return air valve control chip. The switch pins of the return air valve control chip are respectively connected to the KA3 relay left and right-position contacts. The COM pins of the carbon dioxide fire extinguishing solenoid valve control chip, the fire exhaust valve control chip, and the return air valve control chip are all connected to an external neutral wire N.

[0006] Further, a buzzer FM1 is connected to the second branch line between the output end of the NC contact of KT1 and the neutral wire N end of the second branch line.

[0007] Further, the button SB1 is a button with a light HL1 / SB1, and the time relay KT1 is connected in parallel with the HL1 / SB1 light.

[0008] Further, three FU1-3 fuses are respectively installed on the first execution line, the second execution line, and the third execution line.

[0009] Further, the PE pins of the carbon dioxide fire extinguishing solenoid valve control chip, the fire exhaust valve control chip, and the return air valve control chip are all connected to a ground wire.

[0010] The beneficial effects achieved by the present utility model are as follows: by setting a time relay, it is possible to prevent the system from executing the emergency program due to accidental human touch. At the same time, the button with a light can emit light to remind the staff when accidentally touched by a human. The setting of the buzzer can remind the factory personnel to evacuate when the emergency electrical control system is started. The setting of the fuse and the ground wire can effectively protect the safety of the electrical circuit. Description of the Drawings

[0011] Figure 1 It is the circuit schematic diagram of a new dust removal emergency electrical control system in the embodiment. Specific implementation manner

[0012] The present utility model will be further described below with reference to the accompanying drawings.

[0013] As Figure 1 shown, the present utility model discloses a new dust removal emergency electrical control system, including: a control circuit, the control circuit includes a first branch line and a second branch line connected in parallel between the live wire L and the neutral wire N of the AC power supply, and a button SB1 and a time relay KT1 are sequentially connected in series on the first branch line from the live wire L to the neutral wire N. A normally open contact of KT1 is provided on the second branch line. A first sub-line, a second sub-line and a third sub-line connected in parallel are connected on the second branch line between the output end of the normally open contact of KT1 and the neutral wire N end of the second branch line. Three KA1-3 intermediate relays are respectively arranged on the first sub-line, the second sub-line and the third sub-line. The live wire L end of the second branch line is connected with an execution circuit. The execution circuit includes a first execution line, a second execution line and a third execution line connected in parallel. The first execution line includes a normally open contact of KA1 and a carbon dioxide fire extinguishing solenoid valve control chip. The switch pins of the carbon dioxide fire extinguishing solenoid valve control chip are respectively connected with the normally open contact of KA1. The second execution line includes a right-position closed contact of KA2 relay and a fire exhaust valve control chip. The switch pins of the fire exhaust valve control chip are respectively connected with the left and right position contacts of KA2 relay. The third execution line includes a left-position closed contact of KA3 relay and a return air valve control chip. The switch pins of the return air valve control chip are respectively connected with the left and right position contacts of KA3 relay. The COM pins of the carbon dioxide fire extinguishing solenoid valve control chip, the COM pins of the fire exhaust valve control chip and the COM pins of the return air valve control chip are all connected with an external neutral wire N.

[0014] Further, as Figure 1 shown, in order to remind personnel to evacuate while starting the emergency electrical control system, a buzzer FM1 is connected on the second branch line between the output end of the normally open contact of KT1 and the neutral wire N end of the second branch line.

[0015] Further, as Figure 1 shown, in order to remind the staff of accidental touch, the button SB1 is a button with a light HL1 / SB1, and the time relay KT1 is connected in parallel with the HL1 / SB1 light. When the button HL1 / SB1 is pressed, the HL1 / SB1 light is powered on and emits light to remind the staff that the button has been accidentally touched.

[0016] Further, as Figure 1 shown, in order to protect the safety of the electrical circuit, three FU1-3 fuses are respectively installed on the first execution line, the second execution line and the third execution line.

[0017] Further, as Figure 1 shown, in order to further protect the safety of the electrical circuit, the PE pins of the carbon dioxide fire extinguishing solenoid valve control chip, the PE pins of the fire exhaust valve control chip, and the PE pins of the return air valve control chip are all connected to the ground wire.

[0018] Based on the above structure, as Figure 1 shown, the specific working principle and process of this structure are as follows:

[0019] When the emergency electrical control system needs to be used, the staff presses the illuminated pushbutton HL1 / SB1, thereby energizing the main control circuit. The illuminated pushbutton HL1 / SB1 emits light. After the time relay KT1 is powered on, it starts timing. When the pressing duration of the illuminated pushbutton HL1 / SB1 reaches the timing requirement of the time relay KT1, the normally open contact of KT1 acts (closes), and both the buzzer FM1 and the intermediate relay KA1-3 are powered on. The buzzer FM1 emits an alarm sound. The normally open contact of KA1 and the left-position closed contact of the KA3 relay both act (switch to the right-position closed), and both the carbon dioxide fire extinguishing solenoid valve and the fire exhaust valve are opened. The right-position closed contact of the KA2 relay acts (switches to the left-position closed), and the return air valve is closed.

[0020] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A new type of dust removal emergency electrical control system, characterized in that: The control circuit comprises a control circuit, wherein the control circuit comprises a first branch line and a second branch line connected in parallel between a live wire L and a neutral wire N of an AC power supply, a button SB1 and a time relay KT1 are sequentially connected in series on the first branch line from the live wire L to the neutral wire N, a KT1 normally open contact is arranged on the second branch line, a first sub-line, a second sub-line and a third sub-line arranged in parallel are overlapped on the second branch line between the output end of the KT1 normally open contact and the neutral wire N end of the second branch line, three KA1-3 intermediate relays are respectively arranged on the first sub-line, the second sub-line and the third sub-line, an execution circuit is overlapped on the live wire L end of the second branch line, and the execution circuit comprises a first execution line, a second execution line and a third execution line connected in parallel, The first execution line includes a KA1 normally open contact and a carbon dioxide fire extinguishing solenoid valve control chip, and the open pin of the carbon dioxide fire extinguishing solenoid valve control chip is connected to the KA1 normally open contact. The second execution line includes a KA2 relay right position closed contact and a fire exhaust valve control chip, and the switch pin of the fire exhaust valve control chip is respectively connected to the left and right contacts of the KA2 relay. The third execution line includes a KA3 relay left position closed contact and a return air valve control chip, and the switch pin of the return air valve control chip is respectively connected to the left and right contacts of the KA3 relay. The COM pin of the carbon dioxide fire extinguishing solenoid valve control chip, the COM pin of the fire exhaust valve control chip, and the COM pin of the return air valve control chip are all connected to an external neutral line N.

2. According to claim 1, a novel dust removal emergency electrical control system is characterized in that: The second branch line between the normally open contact output terminal of KT1 and the neutral line N terminal of the second branch line is connected with a buzzer FM1.

3. According to claim 1, a novel dust removal emergency electrical control system is characterized in that: The button SB1 is a button with light HL1 / SB1, and the time relay KT1 is connected in parallel with the HL1 / SB1 light.

4. According to claim 1, a novel dust removal emergency electrical control system is characterized in that: Three FU1 - 3 fuses are installed on the first execution line, the second execution line and the third execution line respectively.

5. According to claim 1, a novel dust removal emergency electrical control system is characterized in that: The PE pin of the carbon dioxide fire extinguishing solenoid valve control chip, the PE pin of the fire exhaust valve control chip and the PE pin of the return air valve control chip are all connected to a ground wire.

Images