KR200315647Y1 - automatic opening and shutting device of boiler stovepipe - Google Patents

Abstract

The damper, which is installed to open and close in communication, discharges the exhaust gas, is forcibly opened by the damping motor during normal combustion of the boiler, and automatically opened by the exhaust gas pressure when an abnormal pressure exceeds the pressure set in the communication. In that,

A damping motor mounted on the first casing, a damping shaft rotatably installed on the first casing, and a damping shaft rotated by a driving force transmitted from the damping motor fixed to the damping shaft and externally set to a damping shaft. A power interruption coupling that rotates the damping shaft relative to the damping motor when torque is applied, a damper mounted to the damping shaft penetrating the second casing spaced from the first casing, and opening and closing communication; And an on / off means for automatically cutting off the power supplied to the damping motor when the damping shaft rotates in contact with the cam mounted on the damping shaft.

Open the damper when burning the burner and automatically close the damper when the burner stops after combustion to prevent the high heat remaining in the combustion chamber of the boiler from being discharged to the outside through the communication, greatly reducing the fuel consumption and abnormality above the pressure set in the communication. When the pressure is generated, the damper is automatically opened by the exhaust gas pressure, thus eliminating the use of the corresponding parts such as the pressure sensor, thereby reducing the cost cost, and improving the reliability by reducing the frequency of failures by operating the damper by a pure mechanical mechanism. You can.

Description

Automatic opening and shutting device of boiler stovepipe}

The present invention relates to a boiler communication automatic opening and closing device which is installed to open and close to the communication so that a damper (gas damper) for discharging the exhaust gas is forcibly opened or closed by the damping motor drive or automatically opened or closed by the pressure of the exhaust gas. will be.

More specifically, when the boiler is normally combusted, the damper is forcibly opened by the damping motor, and when the abnormal pressure exceeds the pressure set in the communication, the damper is automatically opened by the exhaust gas pressure to discharge the exhaust gas. It relates to a boiler communication automatic switching device.

In general, boilers are classified into ON / OFF combustion apparatuses, three position control type combustion apparatuses, and proportional control type combustion apparatuses according to the type of the combustion apparatus.

The on / off combustion device is a boiler of 300,000 Kcal / H (0.5 ton / Hr) or less, and the combustion is stopped when the temperature inside the boiler reaches a set temperature. Since the off operation is repeated, the high pressure heat loss inside the boiler is caused by the suction force of the communication when the combustion is stopped (shown in FIG. 2).

The 3 position control type combustion apparatus (HIGH-LOW-OFF) is a boiler of 300,000 Kcal / H (0.5ton / Hr) to 1,200,000Kcal / H (2ton / Hr), and reaches the first set temperature and pressure. When the load decreases to about 40 to 50% and rises to the secondary set temperature, it is turned off. In this case, the heat loss generated when the combustion device is driven is as shown in FIG.

The proportional control combustion apparatus is a boiler in which a high quality steam pressure or hot water temperature is required, and uses a proportional control combustion apparatus that automatically adjusts combustion air according to fuel increase and decrease, and occurs when the combustion apparatus is driven. The heat loss is as shown in FIG.

On the other hand, since the communication of the boiler is installed at a height sufficiently considering external factors such as the amount of combustion gas, the temperature of the combustion gas, the discharge speed, and the airflow around the building, strong suction force is generated when the boiler is burned. This suction force continues to work even when the combustion operation of the boiler stops, so that the high temperature heat inside the boiler is released to the atmosphere through open communication due to convection (usually the exhaust gas at 200 ~ 300 ℃ high temperature). As it is, the boiler interior is quenched.

For this reason, when the burner is reburned, the boiler is normally operated only when the inside of the boiler, which has already been cooled, is heated again to a predetermined temperature, thereby causing energy waste.

As shown in FIG. 1, a conventional automatic communication device for opening and closing has a damper (2) provided in the communication device (1) so as to be openable and close, and the exhaust gas of the combustion chamber (4) of the boiler during rotation by the motor (3). It is provided with an exhaust fan (5) for discharging, if the detection value is normal by a sensor (not shown) for detecting the pressure and temperature inside the communication (1), after opening the damper (2) by driving the motor (3) When the burner 6 is ignited and the heat of the high temperature inside the combustion chamber 4 rises to the set temperature to extinguish the burner 6, the damper 2 is closed so that the heat of the high temperature in the boiler causes the communication 1 to flow. It can be prevented from being released to the outside through.

However, since a separate sensor for detecting the pressure and temperature inside the communication 1 is required to open and close the damper 2, an increase in the number of parts causes a cost increase, and the parts related to the sensor have a high temperature. Since the exhaust gas is passed through the communication (1) is installed, the reliability is not reduced due to frequent failures due to high heat, the service life of the corresponding parts is shortened and the parts are frequently replaced, there is a problem that the maintenance cost is increased.

Therefore, an object of the present invention is to open the damper during combustion of the burner and to automatically close the damper when the burner stops after combustion to prevent the high heat remaining in the combustion chamber of the boiler from being discharged through the communication, thereby significantly reducing fuel consumption and thermal efficiency. It is to provide a boiler communication automatic switching device to increase the.

Another object of the present invention is to make the damper open automatically by the exhaust gas pressure when the abnormal pressure is higher than the pressure set in the communication, so that it is not necessary to use the corresponding parts such as the pressure sensor, thereby reducing the cost cost, and also the pure mechanical mechanism of the damper. It is to provide a boiler communication automatic opening and closing device to improve the reliability by operating by.

Still another object of the present invention is to provide a boiler communication automatic switching device which reduces the maintenance cost of the drive unit that opens and closes the damper with a low incidence of failure, and prolongs the service life of the damper.

1 is a schematic diagram of a communication automatic switching device according to the prior art,

2 is a graph showing the relationship between the operation of the conventional on / off combustion apparatus and the heat loss accordingly,

3 is a graph showing the relationship between the operation of the conventional three-position control method and the heat loss accordingly,

Figure 4 is a graph showing the relationship between the operation of the conventional proportional control type combustion device and the heat loss accordingly,

5 is a perspective view of a boiler communication automatic switching device according to the present invention,

6 is a front view of the boiler communication automatic switching device according to the present invention,

Figure 7 is an enlarged cross-sectional view of the coupling for the power control in the automatic boiler communication apparatus according to the present invention,

8 is a view when the damper is opened by the damping motor during normal combustion of the boiler in the automatic boiler communication apparatus according to the present invention,

9 is a view when opening the damper by the pressure of the exhaust gas when an abnormal pressure occurs in the communication in the automatic communication device of the boiler communication according to the present invention,

10 is a schematic diagram of a limit switch for turning on / off the power of the damping motor for opening and closing the damper in the boiler communication automatic switching device according to the present invention,

11 is a graph showing the relationship between the operation of the on / off combustion device and the heat loss according to the installation of the damper according to the present invention,

12 is a graph showing the relationship between the operation of the three-position control method and the resulting heat loss when installing the damper according to the present invention,

Figure 13 is a graph showing the relationship between the operation of the proportional control combustion device and the resulting heat loss when the damper according to the present invention is installed.

* Explanation of symbols used in the main part of the drawing

11; First casing 12; Damping motor

13; Damping shaft 14; Power Coupling

15; Second casing 16; Communication

17; Damper 18; cam

19; Driven coupling 20; Drive Side Coupling

21,22; Groove 23; Clutch ball

24; Elastic member 25; 1st limit switch

26; Second limit switch 27; Drive gear

28; Driven gear 29; sensor

30; Damper opening indicator 31; Damping motor opening indicator

An object of the present invention described above, the damping motor is mounted to the first casing,

A damping shaft rotatably installed on the first casing;

Coupling for power regulation to rotate the damping shaft by the driving force transmitted from the damping motor is fixed to the damping shaft, and to rotate the damping shaft relative to the damping motor when a torque is applied to the damping shaft from the outside and,

A damper mounted to the damping shaft passing through the second casing spaced from the first casing to open and close communication;

On / off means which is built in the first casing and automatically shuts off the power supplied to the damping motor when in contact with the cam mounted on the damping shaft by the damping shaft rotation, when a high pressure of more than the pressure set in the communication It is achieved by providing a boiler communication automatic switching device characterized in that the damper is automatically opened by the slip of the power control coupling.

According to a preferred embodiment, the power interruption coupling,

A driven side coupling fixed to the damping shaft, a drive side coupling coupled to the driven side coupling, the drive side coupling rotating the damping shaft by a driving force transmitted from the damping motor, and the drive side coupling and driven side coupler. It is mounted in a groove formed opposite to the contact surface of the ring, and deviates from the groove of the driven coupling to relatively rotate the driven coupling with respect to the driving coupling when a torque greater than a predetermined value is applied to the damping shaft. And an elastic member elastically biased as an initial state that the clutch ball is coupled to the groove of the driving side coupling and the driven side coupling.

In addition, the on / off means,

A first limit switch which sends a signal to the damping motor upon contact with the cam mounted on the damping shaft to rotate the damper by rotating the damping shaft to open the communication; and a 90 degree phase difference with the first limit switch. And a second limit switch which transmits a signal to the damping motor when the cam contacts the cam, thereby rotating the damper by rotating the damping shaft to close the communication.

The apparatus may further include a sensor configured to detect an opening and closing angle of the damper by detecting an amount of rotation of a driven gear engaged with the driving gear mounted to the damping shaft.

In addition, the first gauge is installed on the outer surface of the second casing and the first guide is fixed to the damping shaft to rotate within the angle range of the first gauge, the opening and closing angle of the damper can be visually confirmed. And a second guide fixed to the damping shaft to rotate within the angle range of the second gauge and the second gauge installed on the outer side of the first casing, and the opening and closing angle of the damper. It further includes a damping motor opening indicator for visual confirmation.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, which are intended to describe in detail enough to be able to easily carry out the invention by one of ordinary skill in the art. This does not mean that the technical spirit and scope of the present invention are limited.

5 to 9, the automatic boiler communication device according to the present invention, the damping motor 12 mounted on the first casing (11), rotatably installed on the first casing (11). The damping shaft 13 is fixed to the damping shaft 13 and the damping shaft 13, and the damping shaft 13 is rotated by a driving force transmitted from the damping motor 12, and the torque is greater than the value set in the damping shaft 13 from the outside. Damping shaft penetrating the damping shaft 13 relative to the damping motor 12 when applied, and the second casing 15 spaced apart from the first casing 11. And a damper 17 mounted on the 13 to open and close the communication 16, and in contact with the cam 18 mounted on the damping shaft 13 by rotating the damping shaft 13 and installed in the first casing 11. And an on / off means for automatically cutting off the power supplied to the damping motor 12.

At this time, the power interruption coupling 14,

A driving side coupled to the driven side coupling 19 fixed to the damping shaft 13 and a driving side coupled to the driven side coupling 19 to drive the damping shaft 13 by a driving force transmitted from the damping motor 12. When a torque greater than or equal to the value set in the damping shaft 13 is applied to the couplings 20 and the grooves 21 and 22 formed to face the contact surfaces of the driving coupling 20 and the driven coupling 19. The clutch ball 23 and the clutch ball 23 are separated from the groove 22 of the driven side coupling 19 so as to rotate the driven side coupling 19 relative to the drive side coupling 20. And an elastic member 24 which is elastically biased as an initial state coupled to the grooves 21 and 22 of the drive side coupling 20 and the driven side coupling 19.

In addition, the on / off means,

The first limit switch which sends a signal to the damping motor 12 when the cam 18 is mounted on the damping shaft 13 to rotate the damper 17 to open the communication 16 by rotating the damping shaft 13. (25) and the 90 degree phase difference with the first limit switch 25, and when the contact with the cam 18 sends a signal to the damping motor 12 to rotate the damper 17 by the damping shaft 13 rotation And a second limit switch 26 for closing the communication 16.

In addition, the sensor 29 is further provided with a sensor 29 for detecting an opening and closing angle of the damper 17 by detecting an amount of rotation of the driven gear 28 engaged with the drive gear 27 mounted on the damping shaft 13.

In addition, the first gauge 30a installed on the outer surface of the second casing 15 and the first guide 30b fixed to the damping shaft 13 so as to rotate within an angle range of the first gauge 30a. And a damper opening degree indicator 30 for visually checking the opening and closing angle of the damper 17,

It consists of a second gauge (31a) installed on the outer surface of the first casing (11), and a second guide (31b) fixed to the damping shaft (13) to rotate within the angle range of the second gauge (31a), A damping motor opening degree indicator 31 is further provided to visually check the opening and closing angle of the damper 17.

In the drawing, reference numeral 12a denotes a linkage composed of several joints for transmitting the rotational force of the damping motor 12 to the coupling 14 to rotate the damping shaft 13, and 33 denotes a communication 16 or in case of emergency. It is a manual handle fixed to the first guide 30b to open and close the damper 17 by rotating the damping shaft 13 without driving the damping motor 12.

In addition, C is a cover detachably fixed to the first casing (11), P1 is a lower communication connected to communicate with the lower portion of the second casing (15), P2 is to communicate with the upper portion of the second casing (15) It is the upper communication connected.

Hereinafter, with reference to the accompanying drawings, the operation of the automatic boiler communication device according to the present invention will be described in detail as follows.

a) The process of opening the damper by the damping motor during normal combustion of the boiler will be explained according to the accompanying drawings.

As shown in FIGS. 5 and 8, when the blower of the boiler combustion device is driven, commercial power is applied to the damping motor 12 to rotate, thereby rotating the damper 17 due to the damping shaft 13 rotation. To open the communication 16.

That is, the damping shaft 13 is rotated by the rotation of the power regulation coupling 14 connected to the damping motor 12 through the linkage 12a and fixed to the damping shaft 13, and the second casing ( The communication unit 16 is opened by rotating the damper 17 fixed to the damping shaft 13 penetrating 15.

At this time, the rotational force of the damping motor 12 is a clutch ball installed in the grooves (21, 22) formed on the mutual contact surface of the driven coupling (19) and the drive coupling (20) fixed to the damping shaft (13) It can be transmitted to the damping shaft 13 through the power interrupting coupling 14, which is integrally rotated with the damping shaft 13 by (23).

Therefore, the hot exhaust gas discharged from the combustion chamber due to the operation of the combustion device is discharged to the atmosphere through the communication (16).

On the other hand, when the temperature of the combustion chamber reaches the set temperature and the combustion operation of the boiler is stopped and the blower of the combustion apparatus is stopped, the high temperature heat remaining in the combustion chamber is discharged to the outside through the communication by automatically closing the communication damper. This can significantly reduce the fuel consumption required to reach the set temperature after the boiler is restarted.

b) The process of opening the damper by the pressure of the exhaust gas when abnormal pressure occurs in the communication will be explained according to the accompanying drawings.

As shown in FIG. 9, when a high pressure of more than a pressure set in the communication 16 is generated and applied to the damper 17, the torque applied to the damping shaft 13 is the power interruption coupling 14. As the damping shaft 13 is rotated relative to the damping motor 12 by exceeding the elastic force of the elastic member 24 intrinsic to the damper, the damper 17 is rotated due to the rotation of the damping shaft 13 so as to communicate with the damping shaft 13. By opening 16, exhaust gas remaining in the communication 16 can be released into the atmosphere.

That is, when a torque greater than or equal to a set value is applied to the damping shaft 13, the clutch ball 23 coupled to the groove 22 of the driven coupling 19 fixed to the damping shaft 13 is coupled to the driving side. Since the groove 20 of the ring 20 is separated, the driven coupling 19 is generated with respect to the driving coupling 20 connected to the damping motor 12 through the linkage 12a. Even when 12 is stopped, the communication 16 can be opened by the high pressure applied to the damper 17.

On the other hand, as shown in Figure 11, when the boiler communication automatic switching device according to the present invention is mounted on / off-type combustion apparatus, when the combustion of the combustion device is stopped and the rotation of the blower is stopped, the damper is automatically closed to the boiler The heat loss is remarkably reduced by preventing the high temperature heat remaining inside from being released into the atmosphere through the communication, and the effect increases as the ventilation suction power of the communication is increased or the number of times the boiler is started and stopped is increased. I could confirm it.

In addition, as shown in Figure 12, when the boiler communication automatic switching device according to the present invention is mounted on the combustion device of the three-position control method, the heat loss is reduced as the damper automatically controls the communication opening according to the load rate of the burner Significantly reduced, the larger the ventilation suction input of the communication, the more the number of start and stop of the boiler was confirmed that the effect is increased.

In addition, as shown in Figure 13, when the boiler communication automatic switching device according to the present invention is mounted on the proportional control combustion device, the damper is completely opened during the pre-purge time to the ignition position When about 10 seconds have elapsed since the ignition, the damper is burned in the completely open state.When the combustion is stopped, the damper is automatically closed to prevent the heat of high temperature remaining inside the boiler from being released to the outside. It was confirmed that the decrease significantly.

As described above, the automatic boiler communication apparatus according to the present invention has the following advantages.

By opening the damper when the burner burns and automatically closing the damper after the burner stops, the high heat remaining in the boiler's combustion chamber can be prevented from being discharged to the outside through the communication, greatly reducing fuel consumption and increasing boiler thermal efficiency. .

In addition, the damper is automatically opened by the exhaust gas pressure when the abnormal pressure is higher than the pressure set in the communication, so it is unnecessary to use the corresponding parts such as the pressure sensor, thereby reducing the cost cost and operating the damper by the pure mechanical mechanism. Therefore, it is possible to improve reliability by reducing the frequency of failures.

In addition, the failure rate of the driving unit for opening and closing the damper is low, and the maintenance cost can be reduced as the service life is extended semi-permanently.

Claims (6)

A damping motor mounted to the first casing; A damping shaft rotatably installed on the first casing; Coupling for power regulation to rotate the damping shaft by the driving force transmitted from the damping motor is fixed to the damping shaft, and to rotate the damping shaft relative to the damping motor when a torque is applied to the damping shaft from the outside ; A damper mounted to the damping shaft passing through the second casing spaced from the first casing to open and close communication; And On / off means which is built in the first casing and automatically shuts off the power supplied to the damping motor when in contact with the cam mounted on the damping shaft by the damping shaft rotation, when a high pressure of more than the pressure set in the communication And automatically open and close the damper by slipping the power interruption coupling. According to claim 1, The power regulation coupling; A driven side coupling fixed to the damping shaft; A driving side coupling coupled to the driven side coupling to rotate the damping shaft by a driving force transmitted from the damping motor; Mounted to a recess formed opposite to a contact surface of the driving side coupling with the driven side coupling, and when the torque is applied to the damping shaft to a torque greater than a predetermined value, the driving side coupling is rotated relative to the driving side coupling. A clutch ball disengaged from the groove of the driven coupling; And And an elastic member elastically biased as an initial state that the clutch ball is coupled to the groove of the driving side coupling and the driven side coupling. The apparatus of claim 1, wherein the on / off means; A first limit switch that sends a signal to the damping motor when the cam is mounted on the damping shaft to rotate the damper to rotate the damping shaft to open the communication; And And a second limit switch installed to have a 90-degree phase difference from the first limit switch to close the communication by sending a signal to the damping motor when the cam contacts the cam to rotate the damper with the damping shaft rotation. Boiler communication automatic switchgear. The boiler according to any one of claims 1 to 3, further comprising a sensor for detecting an opening and closing angle of the damper by detecting an amount of rotation of the driven gear engaged with the driving gear mounted to the damping shaft. Communicating automatic switchgear. According to claim 1, wherein the first gauge is installed on the outer surface of the second casing and the first guide is fixed to the damping shaft to rotate within the angle range of the first gauge, the opening and closing angle of the damper Boiler communication automatic switching device characterized in that it further comprises a damper opening degree indicator for visual confirmation. The method of claim 1, wherein the second gauge is provided on the outer side of the first casing and the second guide is fixed to the damping shaft to rotate within the angle range of the second gauge, the opening and closing angle of the damper with the naked eye Boiler communication automatic switchgear characterized in that it further comprises a damping motor opening degree indicator for checking.