KR101367541B1 - Boiler soot blower - Google Patents

Abstract

The present invention provides a soot blower comprising: a driving part which decelerates and transmits rotation force of a motor that receives power from the outside to rotate; a transferring part which supports the driving part, and converts the rotational motion of the driving part into a linear motion to transfer the driving part back and forth; a steam supplying part for supplying steam by opening a valve through an operation of a lever that is disposed on a transfer path of the driving part to be transferred and forms rotational momentum by the pushing force of the driving part; and an injecting part which is supplied with steam from the steam supplying part, receives the rotational force by being coupled with the driving part, and is retracted into a boiler according to the transfer of the driving part to inject steam to an inner wall of a combustion zone. According to the soot blower of the present invention, it is possible to improve efficiency of power transmission, form a gear mechanism which is not damaged even by external impacts, and ensures a desired injection time of the injecting part and uniform and stable rotation of the injecting part. In addition, it is possible to reduce the size of a gear box, improve ease of maintenance, and improve stability, reliability, and durability for the transfer of the driving part. Also, it is possible to perform an exact and stable opening/closing operation of a poppet valve, prevent ash ingredients and dust from being introduced into a housing, and have a structure capable of manually and simply reversing the injecting part.

Description

Boiler Soot Blower}

The present invention relates to a boiler soot blower, and more particularly to a boiler soot blower for cleaning the inner wall of the boiler combustion zone of the thermal power plant.

In general, large-sized boilers for coal-fired power generation generate high-temperature, high-pressure steam energy generated by burning fuel in a boiler to generate electrical energy.

In this process, ash is generated as the fuel is burned in the boiler furnace, the ash is melted by the heat of high temperature, and the molten iron is cooled and adsorbed to the inner wall of the water tube of the boiler or the boiler tube And accumulated in soot, and the accumulation can also grow to a few meters of clinker.

Since the accumulation hinders the heat transfer of the steam generating tube, a soot blower for removing the accumulation of the outer surface of the tube or the inner wall of the boiler by injecting high-pressure air or high-pressure steam is periodically operated.

Conventional Wall Soot Blower has a mechanism that suppresses linear motion by inducing metal friction during rotation and forward / backward movement and blowing by a pin with a screw groove having a helical groove. This method promotes wear of parts due to intermetallic friction, often causes unintentional situations, and requires excessive power.

In addition, in Korean Patent Application No. 10-1047137, which is applied in advance, a jetting device of a soot blower is inserted into a boiler and a revolving device using a rack gear sliding delaying backward movement so that the jetting part does not reverse while injecting steam (fluid) and its The driving method is presented.

The soot blower has to open the valve so that the steam (fluid) of high temperature and pressure can be injected through the injection part and close the valve again when the injection is completed. This force requires close to one ton to open and close the valve. Since the power of a motor with a small capacity cannot be opened directly, it should be opened with a lever structure.

However, the lever structure of the pressure control part of the machine is designed to open the poppet valve by pressing a simple bar of a gear box to be conveyed in a square shape so that a sufficient lever ratio cannot be obtained. In the experiment, about 300-400 kg of force is applied to the soot blower so that it can be opened, so there is a problem that a lot of load is applied to the motor.

In addition, the configuration of the gear mechanism, the gearbox, the motor, the lance tube, etc., is lifted up a few mm at the moment when a large force of about 300 to 400 kg is applied from the top to the bottom through the gearbox bottom to open the poppet valve. The reason for this is that the above configurations are mounted on rack gears in an almost unfixed configuration in engagement with the pinion gear, and are heard because a lot of force is applied from the bottom up when opening the poppet valve.

However, the action of such a force not only reduces the stability, durability and reliability in the operation of the soot blower, but also has a problem in that it is difficult to open the poppet valve smoothly.

In addition, the soot blower is periodically inserted into the boiler to inject steam (fluid) for a predetermined time and then back out of the boiler is periodically performed, the injection unit is inserted into the boiler to inject any steam or mechanical or electrical If it is unable to back up due to a problem and continues to be located in the boiler, it is necessary to urgently reverse the soot blower so that the injection part is pulled out of the boiler because the tube of the injection part is damaged or deformed. At this time, if the injection portion is damaged, the cost of replacement is large, and the loss of the power plant is very large.

However, the above-mentioned machine is not equipped with a structure capable of manually reversing the machine in the above-mentioned emergency situation, the development of this is urgently required.

Korea Registered patent: 10 - 1047137 (Notification date 07. 07. 07)

Korea Registered Patent: 20 - 0437219 (Published on Nov. 16, 2007)

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems,

The object of the present invention is to prevent the inflow of ash and dust generated during the combustion of the boiler to the maximum, to ensure the stable operation of each component, to minimize the wear of the components to optimize the power transmission efficiency It is to provide a suit blower to minimize the power required.

In addition, another object of the present invention is to open and close the operation of the valve by the opening and closing of the poppet valve for supplying and blocking steam by the operation of the lever to form the rotation momentum by the pushing force of the conveying part of the suit To provide a blower.

In addition, another object of the present invention is to insert the injection portion in the boiler after spraying steam so that it can not be reversed by any mechanical or electrical problems and can be simply retracted the injection unit manually in an emergency situation that is still located in the boiler. To provide a suit blower.

According to an aspect of the present invention, there is provided a driving unit for a motor, A transfer unit that supports the driving unit, converts the rotational motion of the driving unit into a linear motion, and transfers the driving unit back and forth; A steam supply unit which opens and closes the valve to supply steam by an operation of a lever forming rotational momentum by a pushing force of the driving unit which is disposed in the transport path of the driving unit; And an injection unit receiving steam from the steam supply unit, coupled to the driving unit to receive rotational force, and introduced into the boiler by the transfer of the driving unit to inject steam into the inner wall of the boiler combustion zone.

The soot blower further includes a housing covering the components such that ash generated during combustion of the boiler does not flow into the inside, and the spraying part is connected to the steam supply part through one side of the housing and the other end thereof. It is exposed to the outside through the other side of the housing, characterized in that the transfer portion is fixed to the inner wall of the housing.

The drive unit includes a motor for generating a rotational force, a gear unit for reducing and transmitting the rotational force of the motor, a gearbox for protecting the gear unit from the outside and supporting the motor, wherein the gear unit is connected to a drive shaft of the motor The first gear unit for decelerating and transmitting the rotational force of the motor primary, the second gear unit for receiving the rotational force of the first gear unit and receiving the rotational force for the second reduction, and the third gear deceleration for receiving the rotational force of the second gear unit. A third gear unit for transmitting rotational force to the injection unit to be intersected, a fourth gear unit for receiving the rotational force of the third gear unit and reducing the fourth gear, and transmitting the rotational force of the fourth gear unit to the transfer unit; It characterized in that it comprises a fifth gear unit.

Here, the first gear portion is composed of a worm and a worm wheel, the second gear portion is composed of a pair of spur gears having a different number of teeth of the gear, the third gear portion is composed of a helical gear that transmits rotational force to the intersecting axis The fourth gear portion is composed of a pair of spur gears with different teeth of the gear, and the fifth gear portion is composed of a pair of pinions for transmitting rotational force to the transfer portion.

In addition, the worm gear of the first gear unit is coupled to the adapter from the outside of the gearbox through the gearbox shaft of the worm gear, characterized in that the adapter rotates along the direction of rotation of the adapter, the adapter rotates The direction is displayed.

The transfer part is characterized in that the support bar is fixed to the inner wall of the housing, the sliding bar is coupled to the support bar, characterized in that it is composed of a rack gear linearly received by receiving a rotational force from the drive unit.

The length of the rack gear is shorter than the total length of the support bar, and the length ratio between the rack gear and the support bar is proportional to the time of spraying the steam at the jetting part.

In addition, the housing is composed of a frame and the cover is fastened to the frame, the steam supply and the injection unit is fastened by bolts, the support bar of the transfer unit is coupled to the lock holder through the housing, the lock holder is fastening member It is characterized in that coupled to the housing by.

The steam supply unit is coupled to the steam generating unit, the poppet valve for supplying and blocking steam, and the lever for opening and closing the poppet valve on the principle of lever by forming the rotation momentum by the pushing force of the driving unit disposed in the conveying path of the driving unit And, it characterized in that it comprises a steam guide pipe for guiding the steam supplied to the opening of the poppet valve to the injection unit.

The injection unit is rotatably coupled to the outside of the feed tube, the feed tube and the steam supply coupled to the steam supply, one end outer peripheral surface is combined with the drive unit is rotated by receiving a rotational force from the drive unit, It characterized in that it comprises a lance tube for injecting steam supplied to the end coupled to the nozzle and a sealing member provided between the feed tube and the lance tube to prevent the leakage of steam.

On the other hand, the bottom of the housing is characterized in that the fixing member for fixing the steam supply unit is provided.

In addition, the housing is characterized in that the position detection sensor for detecting the position of the front and rear movement of the drive unit is provided, the position detection sensor is provided on both sides of the housing and the sensing medium mounted on the front and rear surfaces of the drive unit; And a limit switch for sensing the sensing medium.

According to the soot blower of the present invention, a gear mechanism that reduces the rotational force of the motor improves power transmission efficiency by using worm gears and helical gears without using gears used in existing gear units, and has a gear mechanism that does not damage external shocks. It is possible to ensure a desired injection time of the injection portion and uniform and stable rotation of the injection portion. In addition, there is an effect that can reduce the size of the gearbox, improve the convenience of maintenance.

In addition, it has a lever structure that opens and closes the valve by the rotation momentum generated by the pushing force of the driving unit, which is disposed on the conveying path of the driving unit, thereby securing a sufficient pushing force even by using a small motor, and providing a sufficient lever ratio. It can be obtained so that the load is not generated in the motor, the opening and closing operation of the poppet valve is not only accurate and stable, but also has the effect that the operation of supplying and blocking steam is made accurately.

In addition, the injection unit is inserted into the boiler and after the injection of steam has a structure that can simply reverse the injection unit manually in an emergency situation that can not be reversed due to any mechanical or electrical problem and continue to be located in the boiler. It is to prevent damage or deformation, and also has the effect of reducing the cost of replacing the injection portion.

1 is a front perspective view showing a soot blower according to an embodiment of the present invention.
Figure 2 is a rear perspective view showing a soot blower according to an embodiment of the present invention.
Figure 3 is a perspective view for showing the internal structure of the gearbox in the soot blower according to an embodiment of the present invention.
Figure 4 is a perspective view showing the extraction of the gears inside the gearbox in a soot blower according to an embodiment of the present invention.
Figure 5 is a bottom perspective view showing a soot blower according to an embodiment of the present invention.
Figure 6 is a perspective view of the transfer unit in the soot blower according to an embodiment of the present invention.
7 (a) is a cross-sectional view showing a rack gear sliding portion in the conveying portion of Fig. 5, and Fig. 7 (b) is a sectional view showing the conveying guide portion.
8 is a perspective view showing the steam supply unit in the soot blower according to an embodiment of the present invention.
Figure 9 is an exploded perspective view of the injection unit in the soot blower according to an embodiment of the present invention.
10 is a cross-sectional view showing a brass plate of the housing penetrated by the soot blower according to an embodiment of the present invention.
11 to 15 are operation diagrams showing the operation of the soot blower in order according to an embodiment of the present invention.
16 is a perspective view for explaining a structure that can manually reverse the soot blower during an emergency of the soot blower according to an embodiment of the present invention.
17 is a cross-sectional view showing a state in which the rack gear falls out of the housing when the soot blower is manually reversed.

These and other objects, features and other advantages of the present invention will become more apparent by describing in detail preferred embodiments of the present invention with reference to the accompanying drawings. Hereinafter, a boiler soot blower of the present invention will be described in detail with reference to the accompanying drawings. For purposes of this specification, like reference numerals in the drawings denote like elements unless otherwise indicated.

FIG. 1 is a front perspective view showing a soot blower according to an embodiment of the present invention, FIG. 2 is a rear perspective view of a soot blower according to an embodiment of the present invention, FIG. 3 is a cross- Fig. 3 is a perspective view showing the internal structure of the gear box in the soot blower according to the embodiment of the present invention. 4 is a perspective view showing the gears inside the gear box extracted from a soot blower according to an embodiment of the present invention, FIG. 5 is a bottom perspective view illustrating a soot blower according to an embodiment of the present invention, FIG. 6 is a perspective view illustrating a transfer part in a soot blower according to an embodiment of the present invention. FIG. 7 (a) is a sectional view showing a rack gear sliding portion in the conveying portion of Fig. 5, Fig. 7 (b) is a sectional view showing the conveying guide portion, and Fig. 8 is a cross- Fig. 3 is a perspective view showing the steam supply portion extracted from the blower. 10 is a cross-sectional view of a brass plate of a housing through which a jetting section of a soot blower according to an exemplary embodiment of the present invention is passed; FIG. 9 is a perspective view illustrating an exploded portion of the soot blower according to an embodiment of the present invention; And Figs. 11 to 15 are operation diagrams sequentially illustrating operations of the soot blower according to the embodiment of the present invention.

1 and 2, the soot blower according to the present invention includes a housing 100, a driving unit 200, a transfer unit 300, a steam supply unit 400, and a jet unit 500 .

The housing 100 shields the ash components and dust generated when the boiler is burned from entering the interior, and covers the outside of the structures described below to protect it from external impacts.

In addition, the housing 100 is composed of a frame 101 to the tripod and the support is padded to reinforce the support force, and a cover 102 fixed to the frame 101 to block the ash and dust from entering the interior, In particular, the cover 102 covering the upper surface of the housing is configured to be coupled to the upper surface of the frame 101 by the connector 103 so that the upper cover 102 can be released by releasing the connector 103 in an emergency.

The driving unit 200 is disposed inside the housing 100, and receives a power source from the outside to rotate the motor 210, a gear unit 220 which reduces and transmits the rotational force of the motor 210, and a gear unit ( It includes a gearbox 230 to protect the 220 from the outside and support the motor.

3, the motor 210 is coupled to one side of the gear box 230 and the driving shaft 211 of the motor 210 is passed through one side of the gear box 230 And a gear portion 220 which is disposed inside the gear box 230 and decelerates the rotational force of the motor 210 is coupled to the drive shaft 211 of the motor 210.

The gear portion 220 includes a first gear portion 221 connected to the driving shaft 210 of the motor for first decelerating and transmitting the rotational force of the motor and a second gear portion 221 receiving the rotational force of the first gear portion 221 A third gear portion 223 that receives rotational force of the second gear portion 222 to distribute the rotational force to a shaft that is third decelerated and intersects with the third gear portion 223, A fourth gear portion 224 that receives the rotational force of the fourth gear portion 224 for fourth deceleration and transmits the fourth gear portion 224 and a fifth gear portion 225 that transmits the rotational force of the fourth gear portion 224 to the transfer portion.

Each of the gear portions and the gear portion is connected to shafts 201, 202 and 203 for transmitting rotational force, and the gear portions connected to the shafts 201, 202 and 203 are fixed by a stopper (not shown) so as not to slip on the key groove.

The first gear portion 221 is constituted by a worm gear 221a and the worm wheel 221b and the second gear portion 222 is constituted by a pair of first and second spur gears 222a and 222b The third gear portion 223 is constituted by a pair of first and second helical gears 223a and 223b and the fourth gear portion 224 is located on the outside of the gear box 230 And the fifth gear portion 225 is constituted by a pair of first and second pinion gears 224a and 224b for transmitting rotational force to the transfer portion 300. The first and second spur gears 224a and 224b, (225a, 225b).

At this time, the worm gear 221a of the first gear unit 221 is coupled to the adapter 240 at the outside of the gearbox 230 through the gearbox 230, the shaft of the worm gear, when the adapter 240 is rotated It is coupled to be rotated along the direction of rotation of the adapter 240. In addition, the rotation direction of the clockwise / counterclockwise direction is displayed on the front surface of the adapter 240.

4, the rotational force of the motor 210 rotates the worm gear 221a coupled to the drive shaft 211 of the motor, and the worm gear 221a rotates the worm wheel 221b engaged with the worm gear. The rotation of the worm wheel 221b is connected to the worm wheel shaft 201 and rotates the first spur gear 222a having a small number of teeth of the gear.

The rotational force of the first spur gear 222a rotates the second spur gear 222b which is meshed with the first spur gear 222a and has a large number of toothed teeth and then rotates on the shaft 202 of the second spur gear 222a The rotational force of the first helical gear 223a is transmitted to the second helical gear 223b coupled to the outer circumferential surface of the jet part 500 and engaged with the first helical gear 223a, And rotates a third spur gear 224a which is connected to the shaft 203 of the first helical gear and is located outside the gear box 230. [

The first helical gear 223a and the second helical gear 223b are meshed with each other at angles of 45 degrees and transmitted to the first helical gear 223a through the second helical gear 223b The rotation is converted vertically and the jetting unit 500 is rotated.

The rotational force of the third spur gear 224a rotates the first pinion 225a through the fourth spur gear 224b engaged with the third spur gear 224a and the rotational force of the first pinion 225a rotates And the second pinion 225b connected to the first pinion shaft 204 is rotated.

5, the first pinion 225a and the second pinion 225b are positioned on both sides of the lower portion of the gear box 230 to transmit the rotational force to the transfer unit 300. [

This gear mechanism is designed to have a reduction ratio of about 180 to 1 by calculating steam injection and running time inside the boiler.

In addition, by using the helical gears 223a and 223b instead of the bevel gears, the third gear unit 223 may secure a desired injection time of the injection unit 500, and reduce the size of the gear box 230. The uniform rotation and large power of the injection unit 500 can be transmitted, thereby achieving stable rotation of the injection unit 500.

The transferring part 300 supports the driving part 200 which is fixed to the inner wall of the housing 100 and rests on the upper surface of the housing part 100 and rotates the rotational force received from the first and second pinions 225a and 225b of the driving part 200, So that the driving unit 200 is horizontally moved.

6, the conveying unit 300 includes a rack gear sliding portion 310 for horizontally moving the driving portion 200 by converting the rotational motion of the driving portion 200 into linear motion, a driving portion 200 mounted on the top surface, And a conveyance guide part 320 for guiding the conveyance of the driving part 200.

In addition, the rack gear sliding part 310 includes a support bar 311, a rack gear 315, and a bushing bearing 316, as shown in FIG. 7A.

Here, the support bar 311 is made of a cylindrical shape, both ends of the support bar 311 is coupled to the lock holder 312 penetrating both side walls of the housing 100, the lock holder 312 is fastening member 313 It is fixed to the housing 100 by).

At this time, when the lock holder 312 releases the fastening member 313 and is separated from the side wall of the housing 100, the rack gear 315 may be drawn out through the through hole 314 to which the lock holder 312 is coupled. It is made of a diameter larger than the diameter of the rack gear 315 so that.

In addition, the rack gear 315 is formed in a hollow cylindrical shape, and a rack engaged with the first and second pinions 225a and 225b of the driving unit 200 is formed on the upper surface thereof to be slid outside the support bar 311. To be combined.

In addition, the bushing bearing 316 is provided inside the rack gear 315 to prevent mechanical friction between the rack gear 315 and the support bar 311, and rotates between the rack gear 315 and the support bar 311. Block the entry of ingredients.

Here, the overall length of the rack gear 315 is formed shorter than the entire length of the support bar 311 has a section in which the rack gear 315 can move. At this time, the length ratio of the rack gear 315 and the support bar 311 is proportional to the time that the steam is injected from the injection unit 500.

In more detail, if the overall length of the rack gear 315 and the overall length of the support bar 311 do not differ much, the section in which the rack gear 315 can be moved is short, so that steam is injected from the injection unit 500. If the time is shortened, and the length difference between the rack gear 315 and the support bar 311 is large, the section in which the rack gear 315 can move becomes longer, so that the steam injection time from the spraying unit 500 becomes longer. do.

The rack gear sliding part 310 may include first and second pinions such that the rack gear 315 is bitten by the first pinion 225a and the second pinion 225b respectively positioned on both sides of the lower gearbox 230. 225a and 225b, respectively.

In addition, the transfer guide 320 includes a guide bar 321, a guide holder 322, and a bushing bearing 323, as shown in FIG. 7B.

Here, the guide bar 321 is a cylindrical bar, and both ends of the bar are fixed to both side walls of the housing 100.

The guide holder 322 has a flat upper surface so that the gear box 230 of the driving unit 200 can be placed on the upper side and is slidably coupled to the outside of the guide bar 321.

The bushing bearing 323 is provided inside the guide holder 322 to prevent mechanical friction between the guide holder 322 and the guide bar 321 and to prevent friction between the guide holder 322 and the guide bar 321 Thereby preventing the component from being introduced.

The flat surface of the guide holder 322 of the conveyance guide unit 320 is coupled to the bottom surface of the gear box 230 of the driving unit 200. At this time, the guide holder 322 may be coupled to a plurality of guide bars 321 to support the gear box 230 stably, and also the guide holder 322 to stably transport the drive unit 200 ) And a plurality of transfer guides 320 formed of guide bars 321 may be provided under the driving unit 200.

As such, the transfer part 300 has the rack gear 315 of the rack gear sliding part 310 engaged with the first and second pinions 225a and 225b so that the conveying part 300 may be rotated in accordance with the rotation directions of the first and second pinions 225a and 225b. When the rack gear 315 is moved horizontally, and the horizontal gear moves to one side wall of the housing 100, the rotating pinions 225a and 225b ride on the rack gear 315 to move the horizontal direction of the housing 100. The driving unit 200 is moved while moving toward the other side wall. The guide unit 320 guides the transfer of the driving unit 200 through the guide bar 321 coupled to the driving unit 200 when the driving unit 200 is transported.

In addition, the bushing bearing 316 of the rack gear sliding part 310 prevents friction between the rack gear 315 and the support bar 311, and guide guide of the bushing bearing 323 of the transfer guide part 320. By preventing the friction between the 322 and the guide bar 321 to reduce the load applied to the motor 210 and to ensure the stability, reliability, durability, etc. for the transfer of the drive unit 200, rack gear sliding portion Since the ash and dust are blocked from being introduced into the 310 and the transfer guide part 320, the transfer of the driving part 200 is prevented as well as the wear of the contact part.

8, the steam supply unit 400 includes a poppet valve 410 coupled to a steam generator (not shown) to supply and cut off steam, a driving unit (not shown) 200 for opening and closing the poppet valve 410 on the principle of the leverage by forming a rotation momentum by the pushing force of the poppet valve 200 and the steam for guiding the steam supplied to the ejector 500 to the opening of the poppet valve 410 And a guide pipe 430.

The poppet valve 410 includes a fixing block 411 protruding from one side of an upper end of the body and hinged to one end of the lever 420 and a flange 411 coupled to a steam generating part 412 are formed.

The lever 420 is connected to a hinge 421 at one end of the fixed block 411 of the poppet valve 410 and a horizontal bar 422 at the center of which is coupled with the valve stem 413 and the pin 422 of the poppet valve 410 And a roller 424 which is coupled to the other end of the horizontal bar 423 and receives a pushing force of the driving part 200 which is disposed on a conveying path of the driving part 200 and is conveyed, And an operating bar 425 having a curved line that curves toward the driving unit 200 so as to form a rotational moment pressing the other end of the horizontal bar 423 by the operating bar 425.

A buffer spring 426 is provided on the bottom surface of the operation bar 425 to absorb an impact so as not to hit the bottom surface of the housing 100 when the operation bar 425 rotates.

This lever structure pushes the valve stem 413 to a rotational momentum about which the operating bar 425 is rotated about the hinge 421 when the gear box 230 is being pushed and the roller 424 of the lever 420 is pushed By applying the lever principle, a sufficient pushing force can be ensured and sufficient leverage ratio can be obtained even if the small motor 210 is used. As a result, no load is generated in the motor 210 and the opening / closing operation of the poppet valve 410 Can be accurately and stably performed.

The steam guide pipe 430 has a flange 431 coupled to the spray part 500 at an end thereof.

As illustrated in FIG. 9, the injection unit 500 may include a feed tube 510 and a feed tube 510 for guiding steam supplied by being coupled to the flange 431 of the steam supply unit 400 to the lance tube 520. The lance tube 520 is rotatably coupled to the outside of the outer circumferential surface is coupled to the driving unit 200 to receive and rotate the rotational force from the driving unit 200, and the nozzle 521 is coupled to the end to inject steam supplied to the outside. And a sealing member 530 provided between the feed tube 510 and the lance tube 520 to seal the steam from leaking.

Here, the feed tube 510 has a flange 511 formed at one end thereof is coupled to the flange 431 and the bolt 512 of the steam guide pipe 430 of the steam supply unit, the other end of the lance tube 520 It is inserted into the steam supplied from the steam supply unit 400 to guide the lance tube (520).

The lance tube 520 is fitted on the outer side of the feed tube 510 so as to be rotatable and is rotatably coupled to a second helical gear 223b engaged with the first helical gear 223a of the driving unit 200, And the other side is exposed to the outside of the housing 100 through one side of the housing 100. [ The lance tube 520 engaged with the helical gear 223a of the driving unit is moved forward and backward in the same direction as the driving unit 200 when the driving unit 200 is transported.

As shown in FIG. 10, a brass plate 110 is provided in the penetration portion of the housing 100, through which one end of the lance tube 520 is inserted, to minimize the interval between the lance tube 520 and the lance tube 520, Inside the brass plate 110, a grease packing 120 capable of withstanding high temperatures is mounted to absorb vibrations generated in the lance tube 520 during steam injection.

That is, the brass plate 110 having a low hardness is reduced to a minimum distance from the lance tube 520 and the lance tube 520, which is caused by the thrust at the time of high-speed jetting of the steam, ) Is reduced.

Also, by sealing the outer side of the lyse tube 520, the graft packing 120 can prevent the ash component and the dust discharged from the boiler from flowing into the inside of the housing.

A fixing member 440 for fixing the steam supply unit 400 is provided on the bottom surface of the housing 100 and a position sensor for sensing the position of the horizontal movement of the driving unit 200 is mounted on the side wall of the housing 100 600 are provided.

Here, the position sensing sensor 600 includes a sensing medium 610 mounted on the front and rear surfaces of the driving unit, and a limit switch 620 provided on both sides of the side wall of the housing to sense the sensing medium.

The limit switch 620 senses the sensing medium 610 according to the forward and backward movement of the driving unit 200 to change the rotational direction of the motor 210 and stop the driving of the driving unit 200.

The soot blower is configured as described above in the combustion of fossil fuels such as coal in the boiler to make steam, the ash component of the fuel during combustion melts in a gel form at high temperature and moves in the combustion zone of the boiler while moving to the inner wall of the combustion zone. Since the slag does not facilitate heat transfer in the inner wall of the tube, the slag and clinker (slag and clinker) is injected by spraying the high and high pressure steam having high kinetic energy to the inner wall of the combustion zone to remove such slag. It is used to remove foreign substances such as clinker. Such a soot blower may be operated three to ten times a day to remove slag from the inner wall of the boiler depending on operating conditions.

The operation of the soot blower will be described with reference to FIGS. 11 to 15. FIG.

The worm gear 221a connected to the driving shaft 211 of the motor 210 is rotated in one direction and the worm gear 221a is engaged with the worm gear 221a, The first spur gear 221b rotates in the direction of 90 degrees with the rotation direction of the worm gear 221a and rotates the first spur gear 222a connected to the shaft 201 of the worm wheel 221b.

The rotational force of the first spur gear 222a rotates the second spur gear 222b engaged therewith and rotates the first helical gear 223a connected to the second spur gear 222b via the shaft 202 .

The rotational force transmitted to the first helical gear 223a is transmitted to the second helical gear 223b coupled to the outer circumferential surface of the lance tube 520 to rotate the lance tube 520 having the rotational direction of intersection, And is connected to the shaft 203 of the first helical gear 223a to rotate the third spur gear 224a located outside the gear box 230. [

The rotational force transmitted to the third spur gear 224a causes the fourth spur gear 224b to be engaged with the third spur gear 224a to rotate, And the second pinion 225b connected to the first pinion 225a via the shaft 204 is rotated in one direction. Then, the rotational force of the first pinion 225a and the second pinion 225b transfers the rack gear 315 meshed thereto.

In this case, as shown in FIG. 11, the rack gear 315 is stopped at a position spaced apart from one side wall of the housing 100, and is moved in one direction by the rotation of the first and second pinions 225a and 225b so that the housing ( 100) the state of Fig. 12 coming into contact with one side wall.

In addition, when the rack gear 315 touches one side wall of the housing 100 and stops without being transported in one direction anymore, the first and second pinions 225a and 225b that rotate are bitten with the rack gear 315. The rack gear 315 is advanced in the opposite direction to which it is transferred, and the lance tube 520 engaged with the driving unit 200 and the driving unit 200 including the gear box 230 is advanced in the direction of the boiler. At this time, the drive unit 200 is transferred to the engagement of the rack gear 315 and the pinion (225a, 225b) is stably transferred by the guide of the transfer guide 320.

The gear box 230 of the advancing driving part 200 pushes the lever 420 of the steam supplying part installed in the conveying path of the driving part 200 and the lever 420 presses the pressing force of the gear box 230 The valve stem 413 of the poppet valve is pressed from the top to the bottom while being rotated about the hinge 421 to open the poppet valve 410.

When the gear box 230 of the driving unit 200 pushes the lever 420, the lance tube 520 of the jetting unit 500 enters the inside of the boiler, and through the opened poppet valve 410 The supplied steam is supplied to the spraying unit 500 through the steam guide pipe 430 and is discharged into the nozzle 521 of the lance tube 520,

When the poppet valve 410 is opened, the sensing medium 610 mounted on the front of the driving unit 200 operates the limit switch 620 and the limit switch 620 applies a signal to the motor 210 The rotation direction of the motor 210 is changed.

When the motor 210 rotates in the reverse direction, the lance tube 520, which receives the rotational force from the driving unit 200, rotates in a reverse direction. As a result, the nozzle 521 for spraying steam rotates counterclockwise Steam is sprayed to the inner wall of the combustion zone of the boiler, and the steam to be sprayed removes slag and foreign matter sticking to the inner wall of the combustion zone.

In addition, the gears rotate in the other direction due to the reverse rotation of the motor 210, and the first and second pinions 225a and 225b, which are end portions of the gear, rotate in the other direction, and the first and second pinions rotate. The rack gears 315 meshed with the 225a and 225b are transferred toward the other wall of the housing 100.

At this time, while the rack gear 315 is transferred toward the other side wall of the housing 100, the driving unit 200 and the lance tube 520 is in place to continue to inject steam to the inner wall of the boiler.

And, as shown in FIG. 14, when the rack gear 315, which is transported, touches the other side wall of the housing 100 and is no longer transported and stops, the pinion 225a, 225b rotated in the other direction is a rack gear ( The lance tube 520 meshed with the 315 and the rack gear 315 is transferred in the opposite direction to which the gear 200 is transferred, and the driving unit 200 including the gear box 230 is backward. It also exits from the inside of the boiler.

At this time, the lever 420 of the steam supply portion which is being pressed by the forward gear box 230 is retracted by the gear box 230, so that the lever 420 is restored to the original position, The poppet valve 410 is closed and the injection of steam is stopped.

When the sensing medium 610 mounted on the rear side actuates the limit switch 620, the limit switch 620 applies a stop signal to the motor 210 so that the rotation of the motor 210 When the rotation of the motor 210 is stopped, the operation of the soot blower is also stopped.

If, due to mechanical or electrical problems, the spraying unit does not back up in the boiler and continues to spray in the boiler, an alarm is sounded to indicate that the operating time has elapsed and the power supply is cut off.

In addition, the manager who listens to the alarm must manually reverse the soot blower so that the lance tube of the sprayer can be pulled out of the boiler.

FIG. 16 is a perspective view illustrating a structure in which the soot blower can be manually reversed in an emergency situation of the soot blower according to an embodiment of the present invention, and FIG. 17 is a rack gear of the housing when the soot blower is manually reversed. It is sectional drawing which shows the state which falls outward.

Referring to Figure 16, the first method is to insert a dedicated tool (not shown) to the adapter 240 coupled to the outside of the gearbox 230 to turn the adapter 240 clockwise and the adapter 240 and The shaft of the combined worm gear 221a rotates in the opposite direction to the rotational direction when the driving unit 200 moves forward, and the gear units 223, 224, 225 engaged with the worm gear 221a interlock with each other to move the driving unit 200 forward. It rotates in the opposite direction of rotation.

Then, the rack gear 312 of the transfer unit 300 received the rotational force of the drive unit 200 is reversed by the reverse rotation of the drive unit, the drive unit including the gear box 230 with the backward of the rack gear 312 As the 200 is reversed, the lance tube 520 coupled with the driving unit 200 also exits from the inside of the boiler.

The second method is to release the lock member 312 of the lock holder 312 holding the support bar 311 of the rack gear sliding part 310 to separate the lock holder 312 from the side wall of the housing 100, Loosen the connector 103 for fixing the top cover 102 of the housing 100 to remove the top cover 102 of the housing, and then loosen the bolt 512 for fixing the feed tube 510 to seal the sealing member ( 530) After the bite is loosened, the chain block (not shown) is pulled to the gearbox 230 and pulled backward, and the driving unit 200, the lance tube 520, and the rack gear 315, which are advanced, are transported backward. The lance tube 520 exits from the interior of the boiler.

At this time, as shown in FIG. 14, the driving unit 200 is advanced and the lance tube 520 is inserted into the boiler so that steam is injected, so that the pinions 225a and 225b of the driving unit are formed of the rack gear 315. Since it is located in the center portion, if the chain block (not shown) in the state in the state, the rack gear 315 and the drive unit 200 is forcibly reversed, the rack gear 315 as shown in FIG. The lock holder 312 exits to the outside of the housing through the through hole 314 to which the lock holder 312 is coupled.

As such, it is possible to prevent damage to the spraying part by reducing the cost of replacing the spraying part by having a structure in which the soot blower can be manually reversed in an emergency situation so that the spraying part can be taken out of the boiler. It becomes possible.

As described above, the present invention improves the efficiency of power transmission by using worm gears and helical gears without using gears used to reduce the rotational force of the motor, and forms a gear mechanism that does not damage external shocks. Therefore, it is possible to secure the desired injection time of the injection unit and to ensure uniform and stable rotation of the injection unit. In addition, the size of the gearbox can be reduced, and the convenience of maintenance is improved.

In addition, by having a lever structure of the steam supply unit for opening and closing the valve by the rotation momentum generated by the pushing force of the driving unit is disposed in the conveying path of the driving unit, it is possible to ensure a sufficient pushing force even using a small motor, It is possible to obtain a sufficient lever ratio, so that no load is generated on the motor, and the opening and closing operation of the poppet valve is not only made accurate and stable, but also the supply and shutoff of steam is made accurately.

In addition, the injection unit is inserted into the boiler and after the injection of steam has a structure that can simply reverse the injection unit manually in the emergency situation that can not be retracted by any mechanical or electrical problems and continue to be located in the boiler. To prevent damage or deformation.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the specific embodiments described above. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims, And equivalents may be resorted to as falling within the scope of the invention.

100: housing 101: frame
102: cover 103: connector
110: brass plate 120: graphite packing
200: drive unit 201,202,203,204: shaft
210: motor 211: drive shaft
220: gear portion 221: first gear portion
221a: worm gear 221b: worm wheel
222: 2nd gear part 222a, 222b: 1st, 2nd spur gear
223: third gear part 223a, 223b: first and second helical gears
224: 4th gear part 224a, 224b: 3rd, 4th spur gear
225: 5th gear part 225a, 225b: 1st, 2nd pinion
230: gearbox 240: adapter
300: Feeder 310: Rack gear sliding part
311: support bar 312: lock holder
313: fastening member 315: rack gear
316: bushing bearing 320: feed guide portion
321: guide bar 322: guide holder
323: Bushing bearing 400: Steam supply
410: Poppet valve 411: Fixing block
412: Flange 413: Valve stem
420: lever 421: hinge
422: pin 423: horizontal bar
424: roller 425: actuating bar
430: steam guide tube 440: fixing member
500: Dispenser 510: Feed tube
511: flange 512: bolt
520: Lance tube 521: Nozzle
530: sealing member 600: position sensor
610: Detection medium 620: Limit switch

Claims (14)

A driving unit that decelerates and transmits a rotating force of a motor that is supplied with power from the outside and rotates;
A transfer unit that supports the driving unit, converts the rotational motion of the driving unit into a linear motion, and transfers the driving unit back and forth;
A steam supply unit that opens and closes the valve to supply steam by an operation of a lever which is disposed in a transfer path of the driving unit and forms a rotational momentum by a pushing force of a driving unit; And
And an injection unit receiving steam from the steam supply unit, coupled with the driving unit to receive rotational force, and introduced into the boiler by the transfer of the driving unit to inject steam into the inner wall of the boiler combustion zone.
The drive unit includes a motor for generating a rotational force, a gear unit for reducing and transmitting the rotational force of the motor, a gearbox for protecting the gear unit from the outside and supporting the motor,
The gear portion includes a first gear portion consisting of a worm gear and a worm wheel for reducing the rotational force of the motor, wherein the worm gear is coupled to the adapter at the outside of the gearbox through the gearbox and the shaft is reversed when the adapter rotates. Boiler suit blower, characterized in that it is coupled to move. The method of claim 1,
The soot blower further includes a housing to prevent the ash component generated during combustion of the boiler from flowing into the inside,
One end of the injection part is connected to the steam supply part through one side of the housing and the other end is exposed to the outside through the other side of the housing,
The transfer blower is characterized in that the blower is fixed to the inner wall of the housing. The method of claim 1,
The gear unit is a second gear unit for receiving the rotational force of the first gear unit to decelerate, The third gear unit for transmitting the rotational force to the injection unit to receive the rotational force of the second gear unit to reduce the speed, and the third gear And a fourth gear part configured to receive the rotational force of the negative gear and decelerate; and a fifth gear part configured to receive the rotational force of the fourth gear part and to transmit the rotational force to the transfer part. The method of claim 3, wherein
The second gear portion is composed of a pair of spur gears with different number of teeth of the gear, the third gear portion is composed of a helical gear that transmits rotational force to the intersecting axis, the fourth gear portion is a pair with different number of teeth of the gear And a fifth gear portion, wherein the fifth gear portion is composed of a pair of pinions for transmitting rotational force to the transfer portion. delete The method of claim 1,
The adapter blow suit characterized in that the direction of rotation is indicated. 3. The method of claim 2,
The transfer part is a soot blower, characterized in that the transfer bar is composed of a support bar fixed to the inner wall of the housing, the rack gear is slidably coupled to the support bar and receives a rotational force from the drive unit to linearly move. The method of claim 7, wherein
The rack gear has a total length shorter than the total length of the support bar, the length ratio of the rack gear and the support bar is a soot blower, characterized in that proportional to the time the steam is injected from the injection portion. The method of claim 7, wherein
The housing is composed of a frame and a cover fastened to the frame, the steam supply part and the injection part are fastened by bolts, the support bar of the transfer part is coupled to the lock holder through the housing, the lock holder is fastened by a fastening member Suit blower, characterized in that coupled to the housing. The method of claim 1,
The steam supply unit is coupled to the steam generating unit and the poppet valve for supplying and blocking steam;
A lever which opens and closes the poppet valve on the principle of lever by forming rotational momentum by pushing force of the driving unit which is disposed in the conveying path of the driving unit;
And a steam guide tube for guiding the steam supplied to the opening of the poppet valve to the injection unit. 3. The method according to claim 1 or 2,
The injection unit is coupled to the steam supply unit feed tube for guiding the supplied steam;
A lance tube rotatably coupled to an outer side of the feed tube, the outer circumferential surface of one end of which is coupled to the driving unit, and rotates by receiving rotational force from the driving unit, and a nozzle coupled to the other end to inject steam supplied to the outside;
And a sealing member provided between the feed tube and the lance tube to seal the steam from leaking. 3. The method of claim 2,
Soot blower, characterized in that the fixing member for fixing the steam supply to the bottom surface of the housing. 3. The method of claim 2,
The housing is a soot blower, characterized in that the position detection sensor for detecting the position of the front, rear movement of the drive unit. The method of claim 13,
The position detecting sensor is a soot blower comprising a sensing medium mounted on the front and rear surfaces of the driving unit, and a limit switch provided on both sides of the housing to sense the sensing medium.

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