KR101874990B1 - Rack Sliding Type Valve Rear Wall Blower - Google Patents

Rack Sliding Type Valve Rear Wall Blower Download PDF

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Publication number
KR101874990B1
KR101874990B1 KR1020170135310A KR20170135310A KR101874990B1 KR 101874990 B1 KR101874990 B1 KR 101874990B1 KR 1020170135310 A KR1020170135310 A KR 1020170135310A KR 20170135310 A KR20170135310 A KR 20170135310A KR 101874990 B1 KR101874990 B1 KR 101874990B1
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South Korea
Prior art keywords
driving unit
steam
boiler
driving
gear
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KR1020170135310A
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Korean (ko)
Inventor
강신섭
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주식회사 아이스기술
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Publication of KR101874990B1 publication Critical patent/KR101874990B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/54—De-sludging or blow-down devices
    • F22B37/545—Valves specially adapted therefor

Abstract

The present invention relates to a driving unit for driving a motor, A conveying unit that supports the driving unit and converts the rotational motion of the driving unit into linear motion to move the driving unit forward and backward; A lance tube which is rotated by receiving the rotational force from the driving unit and is drawn into the boiler by interlocking with the forward movement of the driving unit and injects steam to the inner wall of the boiler combustion zone, A jetting portion formed; And a lever coupled to a rear end of the feed tube of the injecting part and coupled to a shaft connected to the driving part to open and close the valve to generate a rotation momentum interlocked with a pulling force of the shaft upon forward movement of the driving part, And a poppet valve for controlling the supply of steam by opening and closing the valve.
According to the embodiment of the present invention, the poppet valve is coupled to the rear of the feed tube, which is the injection nozzle, to facilitate the maintenance and maintenance of the poppet valve and to remove the steam guide pipe connecting the feed tube and the poppet valve, The steam supplied to the opening is directly supplied to the injection nozzle, thereby preventing the pressure loss of the steam and increasing the spraying ability of the steam. In addition, since the U-shaped steam guide tube is removed, the structure is simplified and the durability is increased.

Description

Rack Sliding Type Valve Rear Wall Blower

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a valve-rear wall blower of a rack gear sliding type, more particularly, to efficiently clean the inner wall of a boiler combustion zone of a thermal power plant, facilitate the maintenance of a poppet valve, And more particularly, to a valve-type rear wall blower of a rack gear sliding type.

Generally, a large-sized boiler for thermal power generation using coal as a fuel generates electric energy by transferring high-temperature high-pressure steam energy generated by burning fuel in a boiler to a turbine.

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.

Soot Blower is used to remove soot accumulated in the boiler, and various products and names are used depending on the application location.

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, Korean Patent No. 10-1047137, which is a prior application, discloses a jamming machine using a rack gear slide that delays a backward movement of the soot blower so that the jetting portion of the soot blower is inserted into the boiler and injects steam, Driving method.

The soot bluer must open the valve so that high temperature and high pressure steam (fluid) can be injected through the injection part and close the valve once the injection is finished. Since the motor can not be opened directly by the force of the motor having a small capacity, the leverage structure should be adopted and opened.

However, since the leverage structure of the pressure control unit of the above-described jamming machine is designed to open the poppet valve by pressing a simple shaped bar of the gear box to be conveyed, a sufficient leverage ratio can not be obtained. A force of about 300 to 400 kg is required to be applied to the soot blower, which causes a problem that a large load is applied to the motor.

In addition, when the poppet valve is opened, a large amount of force of about 300 to 400 kg is applied from the bottom of the gearbox to the top and bottom, and the gear mechanism, gear box, motor, lance tube, The reason for this is that the above structures are mounted on the rack gear with the pinion gear interlocked in an almost non-fixed structure and are heard because a lot of force is applied from the bottom to the top when opening the poppet valve.

However, the action of such a force not only deteriorates stability, durability and reliability in operation of the sootblower, but also poses difficulties in smoothly opening the poppet valve.

In order to solve this problem, the applicant of the present invention has proposed a method of opening and closing a poppet valve for supplying and shutting off steam through the operation of a lever for generating rotational momentum by a pushing force of a driving part, Soot blower is performed accurately and stably.

As shown in FIG. 1, the soot blower of the present application is provided with a poppet valve 10 connected to a steam generating unit to supply and block steam, and a driving motor A lever 20 for opening and closing the poppet valve on the principle of the leverage, and a U-shaped steam guide pipe 30 for guiding the steam supplied to the opening of the poppet valve to the injection nozzle.

Since the poppet valve 10 is located at a lower portion of the feed path of the driving unit 40, it is difficult to maintain the poppet valve 10 in the event of a trouble such as fixing of the steam, and the poppet valve 10 and the feed tube There is a problem that the steam guide pipe 30 forms a U-shaped flow path, so that an insufficient pressure drop of steam occurs and the structure becomes complicated.

In addition, the nozzle of the lance tube rotates 360 degrees and is periodically inserted into the boiler at a predetermined depth, ejecting steam for a predetermined time with a predetermined radius, and moving backward to exit from the boiler. (B) between the steam spraying radii, even when the spraying radius R1 of the steam injected into the furnace wall is constant and the cavity spraying is performed by using a plurality of wall blasters, There is a problem that adherents are left without being removed.

(Patent Document 0001) Korean Patent No. 10-1367541 (Registered on Feb. 19, 2014)

(Patent Document 0002) Korean Patent No. 10- 1047137 (registered on June 30, 2011)

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

It is an object of the present invention to provide a poppet valve at the rear of a feed tube which is a spray nozzle to facilitate maintenance and maintenance of the poppet valve and to remove the steam guide pipe connecting the feed tube and the poppet valve, The present invention is to provide a rack-gear sliding type valve rear wall blower which prevents steam pressure loss and increases the spraying ability of steam by directly supplying steam to the injection nozzle.

It is another object of the present invention to provide a steam generator for a steam generator, which is capable of controlling the injection radius of an injection nozzle for injecting steam into the boiler, thereby performing differential injection of the first region injection and the second region injection on the inner wall of the boiler, And it is an object of the present invention to provide a valve-type rear wall blower of a rack gear sliding type that can efficiently remove adherents remaining in a shadow zone by a common jetting interval generated upon ejection of a second zone.

According to an aspect of the present invention, there is provided a rack-and-gear sliding type valve rear wall blower, comprising: a driving unit that decelerates and transmits a rotational force of a motor that is supplied with power from the outside; A conveying unit that supports the driving unit and converts the rotational motion of the driving unit into linear motion to move the driving unit forward and backward; A lance tube which is rotated by receiving the rotational force from the driving unit and is drawn into the boiler by interlocking with the forward movement of the driving unit and injects steam to the inner wall of the boiler combustion zone, A jetting portion formed; And a lever coupled to a rear end of the feed tube of the injecting part and coupled to a shaft connected to the driving part to open and close the valve to generate a rotation momentum interlocked with a pulling force of the shaft upon forward movement of the driving part, And a poppet valve for controlling the supply of steam by opening and closing the steam generator.

Here, the poppet valve may include a valve body having therein an inlet connected to the steam generating portion and an outlet coupled to the feed tube, the valve body being disposed in the passage through the upper surface of the valve body, A valve body having an opening at the upper end of the opening and closing member, a central portion being axially coupled to an upper end of the opening and closing member, And the lever is axially coupled to form a rotation momentum on the force pulled by the shaft to vertically move the opening / closing member.

The shaft is axially coupled with the other end of the lever. The shaft is coupled to the hollow portion of the holder horizontally aligned with the other end of the lever. The end portion of the holder passes through the hollow portion, And the step is engaged with the holder.

A first limit switch senses a first movement position of the driving unit and applies a reverse driving signal to the driving unit on the movement path of the driving unit. The first limit switch senses a second movement position of the driving unit and outputs a reverse driving signal to the driving unit. And a second limit switch to which the second limit switch is applied.

Wherein the lance tube injects steam into a first region of the inner wall of the boiler at a first movement position of the driving unit sensed by the first limit switch and at a second movement position of the driving unit sensed by the second limit switch, And the amount of rotation momentum of the lever acting as a pulling force of the shaft varies according to the first movement position and the second movement position of the drive unit, The steam injection amount and the steam injection pressure are different.

The first region of the inner wall of the boiler is a peripheral region of the lance tube drawn into the inner wall of the boiler, and the second region of the inner wall of the boiler is an outer region of the first region.

The conveying portion includes a support bar having both ends fixed to an inner wall of the housing, a rack gear slidably coupled to the support bar and linearly moved by receiving a rotational force from the driving portion, And the length ratio between the rack gear and the support bar is proportional to the time of spraying the steam in the jetting section.

The drive unit includes a gear box for supporting a motor for generating a rotational force and for protecting a gear unit for transmitting and decelerating a rotational force of the motor from the outside, and the gear box is provided with a gear box And a detection medium is provided.

According to the embodiment of the present invention, the poppet valve is coupled to the rear of the feed tube, which is the injection nozzle, to facilitate the maintenance and maintenance of the poppet valve and to remove the steam guide pipe connecting the feed tube and the poppet valve, The steam supplied to the opening is directly supplied to the injection nozzle, thereby preventing the pressure loss of the steam and increasing the spraying ability of the steam.

In addition, since the U-shaped steam guide pipe is removed, the structure is simplified and the durability can be increased.

In addition, by selectively controlling the first limit switch and the second limit switch, the injection radius of the nozzle and the supply amount of the steam according to the amount of the drawn-in nozzle into the boiler are controlled to control the injection of the first region of the inner wall of the boiler, So that the adhering matter remaining in the shade section can be effectively removed.

1 is a perspective view showing a conventional soot blower;
BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a rack-
3 is a rear perspective view of a valve-back wall blower of a rack gear sliding type according to an embodiment of the present invention.
4 is a side view showing a valve-rear wall blower of a rack gear sliding type according to an embodiment of the present invention;
5 is a perspective view illustrating a driving unit in a valve-rear wall blower of a rack gear sliding type according to an embodiment of the present invention.
6 to 8 are side views illustrating the operation of a poppet valve that is opened or closed in accordance with movement of a driving unit in a rear wall blower according to an embodiment of the present invention.
9-12 are operational diagrams illustrating a rear wall blower operation in accordance with one embodiment of the present invention.
13 is a conceptual diagram showing a steam injection section according to a nozzle drawing amount of a lance tube in a rear wall blower according to an embodiment of the present invention.
14 is a conceptual diagram showing a steam injection radius of a nozzle for spraying steam in the first area and the second area of the inner wall of the boiler in a rear wall blower according to an embodiment of the present invention.

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. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a valve-rear wall blower of a rack gear sliding type according to an embodiment 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.

Referring to FIGS. 2 to 4, the structure of the valve rear wall blower of the rack gear sliding type according to the embodiment of the present invention will be described, and with reference to FIG. 5, 6 and 8, the operation of the poppet valve opened and closed according to the movement of the driving unit will be described. Referring to FIGS. 9 to 14, the operation of the valve- In accordance with the detection signals of the first limit switch and the second limit switch of the valve-rear wall blower of the rack gear sliding type according to the present invention, the first region and the second region of the inner wall of the boiler are subjected to differential injection Explain.

As shown in FIGS. 2 to 4, a rack-and-rear sliding-type valve rear wall blower according to an embodiment of the present invention includes a driving unit 200 for reducing the rotational force of a motor, A transfer unit 300 for supporting the drive unit and converting the rotational motion of the drive unit into linear motion to move the drive unit forward and backward; a drive unit for rotating the drive unit by rotating the drive unit and interlocking with the forward movement of the drive unit, (400) composed of a lance tube for spraying steam on the inner wall of the zone and a feed tube for guiding the supply of steam to the lance tube, a shaft connected to the rear of the lance tube and having a lever for opening and closing the valve, The valve is opened and closed by the operation of the lever which is coupled with the force of pulling the shaft when advancing the driving part to form the rotation momentum It is configured to include a poppet valve 500 for controlling the supply of open steam.

The driving unit 200 includes a motor 210 disposed inside the housing 100 and rotated by receiving power from the outside, a gear unit 220 for transmitting and rotating the rotational force of the motor 210, And a gear box 230 that protects the portion 220 from the outside and supports the motor.

2 and 4, the driving unit 200 includes a motor 210 coupled to one side of the gear box 230 and a driving shaft 211 of the motor 210 coupled to one side of the gear box 230 And the gear portion 220 for decelerating the rotational force of the motor 210 is coupled to the driving shaft 211 of the motor 210. [

5, the gear portion 220 includes a first gear portion 221 connected to the drive shaft 210 of the motor for first decelerating and transmitting the rotational force of the motor, a first gear portion 221, And a third gear portion 223 for distributing a rotational force to a shaft that is third-speed reduced and crossed by receiving the rotational force of the second gear portion 222. The second gear portion 222 receives the rotational force of the second gear portion 222, A fourth gear portion 224 for receiving the rotational force of the third gear portion 223 for fourth deceleration and transfer and a fifth gear portion 225a for transmitting the rotational force of the fourth gear portion 224 to the transfer portion , 225b.

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 is constituted by a pair of first and second pinions 225a and 225b for transmitting rotational force to the transfer portion 300. The first and second pinions 225a and 225b ).

More specifically, the rotational force of the motor 210 rotates the worm gear 221a coupled to the drive shaft 211 of the motor. The worm gear 221a rotates the worm wheel 221b, which is 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.

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 jetting unit 400 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 400 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.

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 the steam injection and driving time inside the boiler.

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.

The transfer unit 300 includes a support bar 320 having both ends fixed to the inner wall of the housing 100 and a support bar 320 slidably coupled to the support bar to rotate the first and second pinions 225a and 225b of the drive unit 200 And a rack gear 310 that receives and moves linearly.

Here, the entire length of the rack gear 310 is formed to be shorter than the entire length of the support bar 320, so that the rack gear 310 can move. At this time, the length ratio between the rack gear 310 and the support bar 320 is proportional to the time of spraying the steam in the jetting section 400.

The feed unit 300 is horizontally moved forward and backward in accordance with the rotational direction of the first and second pinions 225a and 225b by engaging with the first and second pinions 225a and 225b, When the rack gear 310 that has moved horizontally contacts the one side wall of the housing, the rotating pinions 225a and 225b are moved toward the other side wall of the housing through the rack gear 310 to transfer the driving unit 200 .

The sprayer 400 includes a feed tube 410 coupled to a steam generator (not shown) and guiding the steam supplied to the opening of the poppet valve 500 to the lance tube 420, And a lance tube 420 which rotatably coupled to the driving unit 200 and coupled to the driving unit 200 to receive rotational force from the driving unit 200 and to which the nozzle 421 is coupled at an end to spray the supplied steam to the outside . Between the feed tube 410 and the lance tube 420, a sealing member for sealing the steam is included.

The lance tube 420 is fitted on the outer side of the feed tube 410 and is rotatably engaged with a second helical gear (not shown) which is engaged with the first helical gear 223a of the driving unit 200 And is transmitted from the driving unit 200 in the same direction as the driving unit 200 when the driving unit 200 is transported.

The poppet valve 500 is coupled to the rear end of the feed tube 410 and the lever 530 of the poppet valve is coupled to the end of the shaft 250 slidably engaged with the upper surface of the gear box of the driving unit.

6 to 8, the poppet valve 500 includes a passageway for connecting an inlet 511 coupled to a steam generator (not shown) and an outlet 512 coupled to the feed tube A valve body 510, an opening / closing member 520 disposed in the passage passing through the upper surface of the valve body to open / close the passage through vertical movement, a central portion 531 coupled to the upper end of the opening / closing member, One end 532 is axially coupled to the fixing portion 540 protruding from the upper end of the valve body and the other end 533 is axially coupled with the shaft 250 to generate rotational momentum in the pulling force of the shaft 250 And a lever 530 for vertically moving the opening and closing member 520.

The shaft 250 coupled to the other end 533 of the lever 530 is provided outside the storage box of the drive unit and is connected to the hollow portion 261 of the holder 260 which is horizontal to the other end 533 of the lever. And a step 251 having a larger diameter is formed at an end portion passing through the hollow portion 261 so as to be engaged with the holder 260. [

That is, the poppet valve 500 is coupled to the rear of the feed tube 410 of the injection part, and the lever 530 for opening and closing the valve is coupled with the shaft 250 connected to the driving part 200, The valve 530 is opened and closed by the operation of the lever 530 which is linked to the pulling force of the shaft 250 to form the rotation momentum, thereby controlling the supply of the steam.

A first limit switch 610 detects the first movement position of the driving unit 200 and applies a reverse driving signal to the driving unit 200 on the movement path of the driving unit 200, And a second limit switch 620 for sensing a position of the driving unit 200 and applying a reverse driving signal to the driving unit 200.

The gear box 230 of the driving unit is provided with a sensing medium 270 to be sensed by the first and second limit switches 610 and 620, respectively.

Here, the first limit switch 610 is first contacted with the sensing medium 270 provided in the gear box of the driving unit that is advanced from the first and second limit switches 610 and 620 provided on the conveying path of the driving unit , And the second limit switch 620 will be referred to later.

The first limit switch 610 is provided at a point where the nozzle 421 of the lance tube is drawn into the boiler by the advancement of the driving unit on the conveying path of the driving unit and is positioned in the range of the steam emission radius of the first area R1 of the inner wall of the boiler do.

The second limit switch 620 is provided at a position spaced apart from the first limit switch 610 by a predetermined distance on the movement path of the driving unit. The nozzle 421 of the lance tube is drawn into the boiler, And the region R2 is located at a position located in the range of the steam injection radius.

Here, since the first limit switch 610 is first brought into contact with the sensing medium 270 of the gear box when the driving unit is advanced, and the second limit switch 620 is in contact with the sensing medium 270 at a later time, 1 limit switch 610. In the following description,

The first and second limit switches 610 and 620 are controlled to selectively receive or sequentially receive signals according to a user's operation or according to a predetermined mode in the control unit.

The first region R1 of the inner wall of the boiler is the peripheral region of the lance tube 4210 drawn into the inner wall of the boiler and the second region R2 of the inner wall of the boiler means the outer region of the first region R1.

7, the poppet valve 500 is moved to a position where the sensing medium 270 provided in the gear box 230 of the driving unit is sensed by the first limit switch 610 by the forward movement of the driving unit 200, Step is opened to supply steam to the lance tube 420.

8, at a position where the sensing medium 270 provided in the gear box 230 of the driving unit is sensed by the second limit switch 620 by the forward movement of the driving unit 200, Since the rotational momentum of the poppet valve lever 530 due to the movement is larger, the valve is opened larger than the first step to supply more steam to the lance tube 420. That is, the poppet valve 500 performs the differential injection according to the steam supply amount at the positions of the first and second limit switches 610 and 620.

The operation of the valve rear wall blower of the above-described rack gear sliding type will be described as follows

9, when power is applied to the motor 210 and the motor 210 rotates in one direction, the first pinion 225a is rotated by interlocking gear portions connected to the drive shaft 211 of the motor 210, And the rack gear 310 engaged with the second pinion 225b are moved.

The rack gear 310 is stopped at a position spaced apart from the one side wall of the housing 100 and is unidirectionally conveyed by the rotation of the first and second pinions 225a and 225b to be contacted with one side wall of the housing. State of

The first and second pinions 225a and 225b are rotated by the rack gear 310 while being locked with the rack gear 310 when the rack gear 310 contacts one side wall of the housing, The driving unit 200 including the gear box 230 and the lance tube 420 engaged with the driving unit 200 are advanced toward the direction of the boiler.

11, the sensing unit 270 provided in the gear box 230 is brought into contact with the first limit switch 610 to apply a reverse driving signal to the driving unit 200 . At this time, the nozzle 421 of the lance tube is drawn into the boiler and is positioned in the range of the steam injection radius of the first region R1 of the inner wall of the boiler. At the same time, The lever 530 of the poppet valve 500 forms rotational momentum to open the poppet valve 500 by the pulling force. The steam supplied through the open poppet valve 500 is injected into the nozzle 421 of the lance tube through the feed tube 410.

In addition, the motor 210, which receives the reverse driving signal from the first limit switch, reversely rotates by changing the direction of rotation, and the nozzle 421 of the lance tube 420, which receives the rotational force from the driving unit 200, The steam is sprayed to the first region R1 of the inner wall of the combustion zone of the boiler, and the sprayed steam removes slag and foreign matter adhering to the first region R1 of the inner wall of the combustion zone.

The first and second pinions 225a and 225b, which are distal end portions of the gear portion, rotate in the other direction, and the first and second pinions 225a and 225b rotate in opposite directions, The rack gears 310 engaged with the rack gears 225a and 225b are moved toward the other side wall of the housing.

At this time, while the rack gear 310 is being conveyed toward the other side wall of the housing, the driving unit 200 and the lance tube 420 stand in place to continuously inject steam into the first region R1 of the inner wall of the boiler.

The pinions 225a and 225b which are rotated in the other direction are stopped by the rack gear 310 while the rack gear 310 is bite with the rack gear 310, The driving unit 200 including the gear box 230 moves backward and the lance tube 420 engaged with the driving unit 200 is also withdrawn from the inside of the boiler.

12, when the signal of the first limit switch 610 is turned off and the signal of the second limit switch 620 is turned on, the advancing driver is connected to the gear box 230 The sensing medium 270 is brought into contact with the second limit switch 620 to apply a reverse driving signal to the driving unit 200. At this time, the nozzle 421 of the lance tube is drawn into the boiler and is positioned within the range of the steam emission radius of the second region R2 of the inner wall of the boiler. At the same time, the pulling force of the shaft 250 due to forward movement of the driving unit The lever 530 of the poppet valve forms a rotation momentum to open the poppet valve 500. [

The steam supplied through the opened poppet valve 500 is injected into the nozzle of the lance tube 420 through the feed tube 410. At this time, since the forward movement distance of the driving unit 200 is larger than that when the first limit switch 610 is in contact with the first limit switch 610, the rotational momentum of the poppet valve lever 530 becomes larger, The supply amount of the cursor steam is further increased.

 In addition, the motor 210 receiving the reverse driving signal from the second limit switch 620 reverses the direction of rotation and reversely rotates. When the nozzle 421 of the lance tube 420, which receives the rotational force from the driving unit 200, The steam is sprayed to the second region R2 of the inner wall of the combustion zone of the boiler and the sprayed steam removes the slag and the foreign substance adhered to the second region R2 of the inner wall of the combustion zone.

The first and second pinions 225a and 225b, which are distal end portions of the gear portion, rotate in the opposite direction, and the first and second pinions 225a and 225b rotate in opposite directions. The rack gears 310 engaged with the pinions 225a and 225b are moved toward the other side wall of the housing.

At this time, while the rack gear 310 is being conveyed toward the other side wall of the housing, the driving unit 200 and the lance tube 420 stand in place to continuously inject steam into the second region R1 of the inner wall of the boiler.

When the rack gear 310 is brought into contact with the other side wall of the housing 100 and can not be transported any more and is stopped, the pinions 225a and 225b rotating in the other direction are engaged with the rack gear 310, The driving unit 200 including the gear box 230 moves backward and the lance tube 420 engaged with the driving unit 200 is also withdrawn from the inside of the boiler do.

As shown in FIGS. 13 and 14, by controlling the selective signal between the first limit switch 610 and the second limit switch 620, the injection radius of the nozzle according to the amount of the drawn-in nozzle into the boiler is controlled, By performing the differential injection of the first region injection and the second region injection, it is possible to efficiently remove the deposit remaining in the shadow region during the first region injection by the common injection region generated in the second region injection.

As described above, according to the present invention, the poppet valve is coupled to the rear of the feed tube, which is the injection nozzle, to facilitate the maintenance and maintenance of the poppet valve and to remove the steam guide pipe connecting the feed tube and the poppet valve, The supplied steam is directly supplied to the injection nozzle, thereby preventing the pressure loss of the steam and increasing the spraying ability of the steam.

In addition, since the U-shaped steam guide pipe is removed, the structure can be simplified and durability can be increased.

In addition, by selectively controlling the first limit switch and the second limit switch, the injection radius of the nozzle and the supply amount of the steam according to the amount of the drawn-in nozzle into the boiler are controlled to control the injection of the first region of the inner wall of the boiler, So that it is possible to efficiently remove adhering matter remaining in the shadow zone.

Hereinafter, the load and durability of the gear portion and the shaft through the design change of the sliding type valve rear wall blower of the present invention were compared with the conventional general product and the foreign product.

As a result, the contact load of the gear part occurred up to about 20kN for the foreign product, while the maximum of 680N and about 670N for the general type and the rear type wall blower occurred. It can be seen that the contact force of the gear part of the general type and the rear type wall blur is relatively lower than that of the foreign product

In addition, after the operation of 10,000 times, weight loss of the drive pin was remarkable in the foreign products. In the case of the general type not using the drive pin, weight reduction was hardly observed. In the case of the rear wall blower, The contact load was negligible. In the case of the rear wall blower, the weight of the holder before the operation is 1.43 Kg, the shaft weight is 3.03 Kg, and the weight loss is not measured after operating 10,000 times. Thus, it can be confirmed that the durability performance is not weakened even if it is changed from the general type to the posterior type. It was confirmed that the same durability was excellent and the stability was secured.

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.

200: Driving parts 201, 202, 203, 204:
210: motor 211: drive shaft
220: gear portion 221: first gear portion
221a: Worm gear 221b: Worm wheel
222: second gear portion 222a, 222b: first and second spur gears
223: third gear portion 223a, 223b: first and second helical gears
224: fourth gear portion 224a, 224b: third and fourth spur gears
225: fifth gear portion 225a, 225b: first and second pinion
230: gear box 250: shaft
251: step 260: holder
261: hollow part 270: sensing medium
300: transfer part 310: rack gear
320: Support bar 400:
410: feed tube 420: lance tube
421: nozzle 500: poppet valve
510: valve body 511: inlet
512: outlet 520: opening / closing member
530: lever 610: first limit switch
620: second limit switch

Claims (8)

A driving unit that decelerates and transmits a rotating force of a motor that is supplied with power from the outside and rotates; A conveying unit that supports the driving unit and converts the rotational motion of the driving unit into linear motion to move the driving unit forward and backward; A lance tube which is rotated by receiving the rotational force from the driving unit and is drawn into the boiler by interlocking with the forward movement of the driving unit and injects steam to the inner wall of the boiler combustion zone, A jetting portion formed; And a lever coupled to a rear end of the feed tube of the injecting part and coupled to a shaft connected to the driving part to open and close the valve to generate a rotation momentum interlocked with a pulling force of the shaft upon forward movement of the driving part, And a poppet valve for controlling the supply of steam by opening /
Wherein the poppet valve includes a valve body having an inlet formed therein and an outlet connected to the feed tube, the inlet communicating with the steam generating portion and the outlet coupled to the feed tube, the valve body being disposed in the passage through the upper surface of the valve body, And an opening / closing member which is axially coupled to the upper end of the opening / closing member and is axially coupled to a fixed portion, one end of which is protruded from one end of the upper end of the valve body, And the lever is configured to generate rotational momentum in response to the pulling force of the shaft to vertically move the opening / closing member,
A first limit switch for detecting a first movement position of the driving unit and applying a reverse driving signal to the driving unit on the movement path of the driving unit, and a second limit switch for sensing a second movement position of the driving unit and applying a reverse driving signal to the driving unit A second limit switch is provided,
Wherein the lance tube injects steam into a first region of the inner wall of the boiler at a first movement position of the driving unit sensed by the first limit switch and at a second movement position of the driving unit sensed by the second limit switch, And the amount of rotation momentum of the lever acting as a pulling force of the shaft varies according to the first movement position and the second movement position of the drive unit, Wherein the steam injection amount and the steam injection pressure are different from each other. delete The method according to claim 1,
And a shaft axially coupled to the other end of the lever is provided on an outer side of the driving unit so as to penetrate a hollow portion of the holder horizontally aligned with the other end of the lever and a stepped portion having a larger diameter is formed at an end portion passing through the hollow portion, And is hooked to the holder. delete delete The method according to claim 1,
Wherein the first region of the inner wall of the boiler is a peripheral region of the lance tube drawn into the inner wall of the boiler and the second region of the inner wall of the boiler is an outer region of the first region. . The method according to claim 1,
Wherein the conveying portion includes a support bar having both ends fixed to the inner wall of the housing, a rack gear slidably coupled to the support bar and linearly moved to receive a rotational force from the driving portion, And a length ratio between the rack gear and the support bar is proportional to a time during which the steam is sprayed from the jetting portion. The method according to claim 1,
Wherein the drive unit includes a gear box for supporting a motor for generating a rotational force and for protecting a gear unit for transmitting and decelerating a rotational force of the motor from the outside, wherein the gear box is provided with a sensing medium sensed by the first and second limit switches, And a rear end portion of the rear end portion of the rear end portion of the valve body.
KR1020170135310A 2017-10-18 2017-10-18 Rack Sliding Type Valve Rear Wall Blower KR101874990B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101367541B1 (en) * 2013-07-09 2014-02-26 이순이 Boiler soot blower
KR101672315B1 (en) * 2015-11-11 2016-11-04 주식회사 아이스기술 Wall-Blower Control System For Boiler
KR101697138B1 (en) * 2016-01-25 2017-01-17 대영기계공업 주식회사 Pre-blowing Soot Blower

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101367541B1 (en) * 2013-07-09 2014-02-26 이순이 Boiler soot blower
KR101672315B1 (en) * 2015-11-11 2016-11-04 주식회사 아이스기술 Wall-Blower Control System For Boiler
KR101697138B1 (en) * 2016-01-25 2017-01-17 대영기계공업 주식회사 Pre-blowing Soot Blower

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