CN202677565U - An air blower alarm device of a heating furnace - Google Patents
An air blower alarm device of a heating furnace Download PDFInfo
- Publication number
- CN202677565U CN202677565U CN 201220223322 CN201220223322U CN202677565U CN 202677565 U CN202677565 U CN 202677565U CN 201220223322 CN201220223322 CN 201220223322 CN 201220223322 U CN201220223322 U CN 201220223322U CN 202677565 U CN202677565 U CN 202677565U
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- heating furnace
- alarm
- audible
- normally
- blast
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Abstract
The utility model discloses an air blower alarm device of a heating furnace. The air blower alarm device comprises a power supply master switch, an AC-DC converter, an alarm relay, and an audible and visual alarm. The power supply master switch controls 380V three-phase AC input. The AC-DC converter and one phase of the 380V three-phase AC inputted through the power supply master switch form a loop which is used for converting 220V AC into 24V DC. One end of the coil of the alarm relay is connected with the anode of the AC-DC converter through the serially-connected normally-closed contacts of three operating contactors of the three air blowers, while the other end of the coil is connected with the cathode of the AC-DC converter. The input end of the audible and visual alarm is connected with the other two phases of the 380V three-phase AC through the normally-open contact of the alarm relay. When the normally-closed contacts connected in series are all in closed state so as to enable the normally-open contact to close, the audible and visual alarm gives an alarm by sound and light so as to timely prompt workers to process faults, preventing a hazard of explosion generated by a gas pipeline because of temper generated by the heating furnace.
Description
Technical field
The utility model relates to the blast of heating furnace control technology, relates in particular to a kind of blast of heating furnace warning device.
Background technology
Blast of heating furnace import suck air enters burner hearth through fan blower, and coal gas is fully burnt, and the flue gas after then will being burnt by induced draft fan is drawn, through with air heat-exchange after emptying.Usually; heating furnace has three fan blowers; a fan blower is arranged as primary normal operation under the normal operating conditions; other two as for subsequent use; when primary fan blower broke down or trips, one of two fan blowers for subsequent use just put into operation, under normal circumstances; fan blower its operation contactor of when operation is in off-state, and is in closure state when shutting down.Yet, in case primary fan blower tripping operation, when two fan blowers for subsequent use all in time do not put into operation (three fan blowers break down simultaneously), the pressure in the burner hearth of heating furnace reduces just can produce tempering, thereby gas piping is blasted, exist great potential safety hazard.
The utility model content
The purpose of this utility model is to provide a kind of blast of heating furnace warning device, and it can when three fan blowers break down simultaneously, in time be notified the staff to carry out fault and get rid of, to reduce potential safety hazard.
For achieving the above object, the utility model provides a kind of blast of heating furnace warning device, comprising:
The battery main switch that is used for the input of control 380V three-phase alternating current;
AC/DC convertor, it wherein one consists of the loop mutually with 380V three-phase alternating current by the input of described battery main switch, is used for the 220V alternating current is become direct current 24V;
Alarm relay, an end of its coil links to each other with the positive pole of described AC/DC convertor by the normally closed contact that is cascaded of three operation contactors of three fan blowers, and the other end of its coil links to each other with the negative pole of described AC/DC convertor;
Audible-visual annunciator, its input end links to each other with described other two-phases of 380V three-phase alternating current by the normally opened contact of described alarm relay, when thereby the described normally closed contact that is cascaded all is in closure state and makes described normally opened contact closed, switch on and send sound and light alarm.
In the blast of heating furnace warning device of the present utility model; because under normal circumstances; its operation contactor is in off-state during the fan blower operation; and be in closure state when shutting down; therefore; when three fan blowers break down simultaneously; three normally closed contacts that are cascaded all are in closure state; thereby make the normally opened contact of alarm relay closed; audible-visual annunciator gets electric and sends sound and light alarm; thereby in time pointed out the staff to do fault handling, avoided greatly reducing potential safety hazard because heating furnace produces the danger that tempering is blasted gas piping.
Description of drawings
Fig. 1 is the electrical schematic diagram of blast of heating furnace warning device of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail:
With reference to shown in Figure 1, the blast of heating furnace warning device of the present embodiment comprises battery main switch Q1,24V switch of the power supply module Q2, sound and light alarm appliance mains switch Q3, AC/DC convertor, DC24V alarm relay J and audible-visual annunciator.Wherein, battery main switch Q1 is used for the input of control 380V three-phase alternating current.AC/DC convertor and 380V three-phase alternating current by battery main switch Q1 input wherein one consist of the loop mutually, and it is used for the 220V alternating current is become direct current 24V, and 24V switch of the power supply module Q2 is arranged on the input circuit of this AC/DC convertor.One end of the coil of DC24V alarm relay J links to each other with the positive pole of AC/DC convertor by the normally closed contact that is cascaded (being KM1, KM2 and KM3) of three operation contactors of three fan blowers, and the other end of its coil links to each other with the negative pole of AC/DC convertor.The input end that is arranged at the audible-visual annunciator on the switch board of heating furnace meter chamber links to each other with other two-phases of 380V three-phase alternating current by the normally opened contact J1 of alarm relay; sound and light alarm appliance mains switch Q3 is arranged on the input circuit of this audible-visual annunciator; because under normal circumstances; its operation contactor is in off-state during the fan blower operation; and be in closure state when shutting down; therefore; when three fan blowers break down simultaneously; three normally closed contacts that are cascaded (are KM1; KM2 and KM3) all be in closure state; thereby make the normally opened contact J1 of DC24V alarm relay J closed, audible-visual annunciator gets electric and sends sound and light alarm.
Above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that the common engineering technical personnel in this area make the technical solution of the utility model all should fall in the definite protection domain of claims of the present utility model.
Claims (4)
1. a blast of heating furnace warning device is characterized in that, comprising:
The battery main switch that is used for the input of control 380V three-phase alternating current;
AC/DC convertor, it wherein one consists of the loop mutually with 380V three-phase alternating current by the input of described battery main switch, is used for the 220V alternating current is become direct current 24V;
Alarm relay, an end of its coil links to each other with the positive pole of described AC/DC convertor by the normally closed contact that is cascaded of three operation contactors of three fan blowers, and the other end of its coil links to each other with the negative pole of described AC/DC convertor;
Audible-visual annunciator, its input end links to each other with described other two-phases of 380V three-phase alternating current by the normally opened contact of described alarm relay, when thereby described three normally closed contacts that are cascaded all are in closure state and make described normally opened contact closed, switch on and send sound and light alarm.
2. blast of heating furnace warning device according to claim 1 is characterized in that, described audible-visual annunciator is arranged on the switch board of heating furnace meter chamber.
3. blast of heating furnace warning device according to claim 2 is characterized in that, the input circuit of described AC/DC convertor is provided with the 24V switch of the power supply module.
4. blast of heating furnace warning device according to claim 3 is characterized in that, the input circuit of described audible-visual annunciator is provided with the sound and light alarm appliance mains switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220223322 CN202677565U (en) | 2012-05-17 | 2012-05-17 | An air blower alarm device of a heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220223322 CN202677565U (en) | 2012-05-17 | 2012-05-17 | An air blower alarm device of a heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202677565U true CN202677565U (en) | 2013-01-16 |
Family
ID=47498452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220223322 Expired - Fee Related CN202677565U (en) | 2012-05-17 | 2012-05-17 | An air blower alarm device of a heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202677565U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481902A (en) * | 2014-11-07 | 2015-04-01 | 安徽马钢自动化信息技术有限公司 | Running detection optimization method for excitation device cooling fans of blast furnace blower |
-
2012
- 2012-05-17 CN CN 201220223322 patent/CN202677565U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481902A (en) * | 2014-11-07 | 2015-04-01 | 安徽马钢自动化信息技术有限公司 | Running detection optimization method for excitation device cooling fans of blast furnace blower |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20150517 |
|
| EXPY | Termination of patent right or utility model |