CN203867949U

CN203867949U - Fan control circuit

Info

Publication number: CN203867949U
Application number: CN201420158442.4U
Authority: CN
Inventors: 穆景光
Original assignee: SHANDONG TONGYUAN DESIGN GROUP CO Ltd
Current assignee: SHANDONG TONGYUAN DESIGN GROUP CO Ltd
Priority date: 2014-04-02
Filing date: 2014-04-02
Publication date: 2014-10-08
Anticipated expiration: 2024-04-02

Abstract

The utility model discloses a fan control circuit. The fan control circuit comprises a main loop and a secondary circuit, wherein the main loop is connected with a power source, and the secondary loop is connected with the main loop. An intermediate relay controlled in a fire control linkage mode is additionally arranged in a secondary circuit diagram of a control box, normally closed contacts of the intermediate relay are connected in a secondary diagram loop in series, and therefore an exhaust fan can be stopped in a linkage mode after fire is determined (all indoor temperature and smoke detectors work and people see the fire). A time relay is additionally arranged in the secondary diagram of the control box, normally open contacts of the time relay are connected in the secondary diagram loop in parallel, and the exhaust fan is restarted after gas is sprayed for five minutes. The fan control circuit can meet the requirements for ordinary manual control, DDC automatic control, emergency manual control after gas spraying and time-relay automatic control after gas spraying of an AC380V single exhaust fan set used in gas extinguishment occasions such as information machine rooms and electricity transformation and distribution rooms.

Description

Draught fan control circuit

Technical field

The utility model relates to a kind of control circuit of blower fan, is particularly useful for the draught fan control circuit in extinction using gas place.

Background technique

Mechanical discipline at information machine room, become and in switchgear room, to be provided with pipe network or without the gas extinguishing system of pipe network, the relevant control of extinction using gas itself does not repeat at this, the control of the air bells exhauster in protective area, above-mentioned place requires: fire is confirmed rear (Indoor Temperature, smoke detector all move or people sees), fire-fighting link is closed all control valves and benefit wind control valve on air bells exhauster and pipeline thereof, protective area forms a seal space, open suppression system main control valve spray fire extinguishing agent (as being automatic time delay 20～30 seconds), injection action generally completed in several seconds.According to < < gas extinguishing system design code > >, information machine room, change switchgear room electrical equipment fire fire extinguishing dip time are 5 minutes.Air bells exhauster in 5 minutes Hou Yingzai opening protection function districts and the control valve special of pipeline bottom thereof and benefit wind control valve, for extinguishing agents such as heptafluoro-propanes in the protective area of draining.

For meeting the technology controlling and process requirement of said exhaust machine; consult state, the province-norms such as 10D303-2, L13D5; existing control box only contains manual and DDC at ordinary times and automatically controls; and after confirming for fire, valve is closed in shutdown, by certain hour, (technological requirement electrical fire is 5 minutes to spray fire extinguishing agent; all kinds of protective areas are different) open again air bells exhauster and management control valve and the control requirement of mending air-valve, can't resolve.

Model utility content

The deficiency existing for solving prior art, the utility model discloses draught fan control circuit, this draught fan control circuit can meet information machine room, become switchgear room etc. have extinction using gas place AC380V separate unit air draft unit at ordinary times manually, automatic, the jet rear emergency manual of DDC and jet rear delayed automatic control requirement.

For achieving the above object, concrete scheme of the present utility model is as follows:

Draught fan control circuit, comprise the major loop being connected with power supply and the secondary circuit being connected with major loop, between power circuit of major loop and ground wire, be in series with successively universal seclector SA, reset button SS, start button SF, normally-closed contact 1KA, fire-closing valve YF, relay coil KM and thermorelay contact KH, described start button SF and normally opened contact KM are in parallel, between terminal of described universal seclector SA and the outlet terminal of normally opened contact KM, be in series with DDC switch, between power circuit of described major loop and the outlet terminal of normally-closed contact 1KA, be in series with normally opened contact 2KA, between described normally-closed contact 1KA outlet terminal and ground wire, be in series with normally opened contact KM and signaling lamp HG, between power circuit of described major loop and ground wire, be also in series with normally opened contact and the auxiliary reclay coil 1KA of automatic fire alarm monitoring module, between power circuit of described major loop and ground wire, be also in series with normally opened contact 1KA and time relay coil 2KA.

Between power circuit of described major loop and ground wire, be also in series with signaling lamp HW.

Described major loop comprises isolating switch QS, low-voltage circuit breaker QF, main noddle on contactor KM, thermorelay KH and the blower fan being in series successively with power supply.

Between described major loop and secondary circuit, be also in series with fus FU.

Working principle: increase by an auxiliary reclay that is subject to fire protection linkage control in the secondary circuit figure of control box, this auxiliary reclay break contact is serially connected in quadratic diagram loop, and fire confirms that rear (Indoor Temperature, smoke detector all move or people sees) linkage stops air bells exhauster like this; In the quadratic diagram of control box, increase by a time relay, this time relay moving together contact is attempted by quadratic diagram loop, and gas sprayed after 5 minutes restarts air bells exhauster.

The beneficial effects of the utility model:

Can be after fire be confirmed, fire-fighting link is closed all control valves and benefit wind control valve on air bells exhauster and pipeline thereof, protective area forms a seal space, open suppression system main control valve spray fire extinguishing agent (as being automatic time delay 20～30 seconds), air bells exhauster in 5 minutes Hou Yingzai opening protection function districts and the control valve special of pipeline bottom thereof and benefit wind control valve (fire-fighting link), for extinguishing agents such as heptafluoro-propanes in the protective area of draining.

Accompanying drawing explanation

Fig. 1 the utility model secondary connection schematic diagram;

Fig. 2 the utility model primary connection schematic diagram.

Embodiment:

Below in conjunction with accompanying drawing, the utility model is elaborated:

As shown in Figure 1-2, draught fan control circuit, comprise the major loop being connected with power supply and the secondary circuit being connected with major loop, between power circuit of major loop and ground wire, be in series with successively universal seclector SA, reset button SS, start button SF, normally-closed contact 1KA, fire-closing valve YF, relay coil KM and thermorelay contact KH, described start button SF and normally opened contact KM are in parallel, between terminal of described universal seclector SA and the outlet terminal of normally opened contact KM, be in series with DDC switch, between power circuit of described major loop and the outlet terminal of normally-closed contact 1KA, be in series with normally opened contact 2KA, between described normally-closed contact 1KA outlet terminal and ground wire, be in series with normally opened contact KM and signaling lamp HG, between power circuit of described major loop and ground wire, be also in series with normally opened contact and the auxiliary reclay coil 1KA of automatic fire alarm monitoring module, between power circuit of described major loop and ground wire, be also in series with normally opened contact 1KA and time relay coil 2KA.Fire-closing valve YF has automatically reset function.

During work: universal seclector is got to manual position; by start button, open air bells exhauster; fire is confirmed rear (Indoor Temperature, smoke detector all move or people sees); fire-fighting link obtains electric to auxiliary reclay coil; auxiliary reclay break contact disconnects; contactor coil dead electricity; main noddle on contactor disconnects; air bells exhauster is shut down, and while time relay coil obtains electric, 20～30 seconds spray fire extinguishing agents of automatic time delay; time relay time delay moving together contact adhesive after 5 minutes; contactor coil obtains electric, main noddle on contactor adhesive, and air bells exhauster starts.

Claims

1. draught fan control circuit, comprise the major loop being connected with power supply and the secondary circuit being connected with major loop, it is characterized in that, between power circuit of major loop and ground wire, be in series with successively universal seclector SA, reset button SS, start button SF, normally-closed contact 1KA, fire-closing valve YF, relay coil KM and thermorelay contact KH, described start button SF and normally opened contact KM are in parallel, between terminal of described universal seclector SA and the outlet terminal of normally opened contact KM, be in series with DDC switch, between power circuit of described major loop and the outlet terminal of normally-closed contact 1KA, be in series with normally opened contact 2KA, between described normally-closed contact 1KA outlet terminal and ground wire, be in series with normally opened contact KM and signaling lamp HG, between power circuit of described major loop and ground wire, be also in series with normally opened contact and the auxiliary reclay coil 1KA of automatic fire alarm monitoring module, between power circuit of described major loop and ground wire, be also in series with normally opened contact 1KA and time relay coil 2KA.

2. draught fan control circuit as claimed in claim 1, is characterized in that, between power circuit of described major loop and ground wire, is also in series with signaling lamp HW.

3. draught fan control circuit as claimed in claim 1, is characterized in that, described major loop comprises isolating switch QS, low-voltage circuit breaker QF, main noddle on contactor KM, thermorelay KH and the blower fan being in series successively with power supply.

4. draught fan control circuit as claimed in claim 1, is characterized in that, is also in series with fus FU between described major loop and secondary circuit.