Boiler tail flue accumulated ash cleaning structure

Abstract

The utility model discloses a boiler tail flue accumulated ash cleaning structure, and relates to the technical field of boilers. The cleaning device comprises a cover plate, a lead screw motor, a mounting frame and an annular pipe, the lead screw motor is fixed to the center of the upper end of the cover plate, a transmission lead screw is rotationally connected into the lead screw motor in a penetrating mode, the mounting frame is fixed to the bottom of the transmission lead screw, and a cleaning motor is fixed into an inner cavity of the mounting frame; an output shaft of the cleaning motor penetrates through the bottom end of the mounting frame and is fixedly provided with a cleaning shaft, and rake rods, scraping plates and steel wire brushes which are symmetrically distributed are fixed to the periphery of the cleaning shaft; an annular pipe is arranged outside the mounting frame, and blowing heads distributed in an annular array are fixed to the outer side face of the annular pipe in a penetrating mode. By arranging the lead screw motor, the transmission lead screw, the cleaning shaft, the rake rod, the scraping plate, the steel wire brush, the annular pipe, the blowing head, the cover plate and the arc plate, the problem that accumulated dust in a boiler flue cannot be comprehensively cleaned is solved; and certain leakproofness is lacked when the accumulated ash of the boiler is cleaned.

Description

Technical Field

[0001] The utility model belongs to the technical field related to boilers, and particularly relates to a dust cleaning structure for a flue at the tail end of a boiler. Background Art

[0002] Ash and slag accumulation in the boiler tail flue is a common phenomenon in boiler operation. The main purpose of boiler maintenance is to clean the ash and slag accumulation in the boiler's high-temperature superheater, medium-temperature superheater, economizer and tail flue, and check the operation of the boiler's environmental protection facilities to ensure the boiler's heat exchange efficiency and operation cycle. Ash accumulation in the boiler tail flue plays a vital role in the long-term, high-load stable operation of the boiler, so it is necessary to regularly clean the boiler tail flue to ensure normal and efficient operation, but the current ash cleaning method still has the following disadvantages:

[0003] As far as boiler combustion is concerned, there are several major factors that affect combustion: induced draft system, fuel composition and ash accumulation in the furnace and flue. Among them, cleaning the ash accumulation in the flue is particularly important. As far as current boilers are concerned, the cleaning method is mostly purging, which is not thorough enough, and stubborn coke blocks cannot be cleaned out, which affects combustion and smoke exhaust efficiency and reduces production efficiency. Therefore, this problem needs to be solved;

[0004] Secondly, during the conventional purge cleaning process, it is easy for particles to fly and dissipate in the surrounding environment, affecting the surrounding environment, surrounding staff and equipment, etc., so it is necessary to ensure a certain degree of containment during cleaning. Utility Model Content

[0005] The utility model aims to provide a dust cleaning structure for the tail flue of a boiler. By arranging a screw motor, a transmission screw, a cleaning shaft, a rake rod, a scraper, a wire brush, a ring pipe, an air blowing head, a cover plate and an arc plate, the utility model solves the problem that the dust in the boiler flue cannot be cleaned comprehensively; and the problem of lack of a certain degree of airtightness when cleaning the boiler dust is solved.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a dust cleaning structure for a flue at the tail end of a boiler, comprising a cover plate, a screw motor, a mounting frame and a ring pipe, wherein a screw motor is fixed at the center of the upper end of the cover plate, and a transmission screw is rotatably connected in the screw motor, a mounting frame is fixed at the bottom of the transmission screw, a cleaning motor is fixed in the inner cavity of the mounting frame, and an output shaft of the cleaning motor passes through the bottom end of the mounting frame and is fixed with a cleaning shaft, symmetrically distributed rake rods are fixed on the outer periphery of the cleaning shaft, and symmetrically distributed scrapers are fixed on the outer periphery of the cleaning shaft above the rake rods, and symmetrically distributed steel wire brushes are fixed on the outer periphery of the cleaning shaft above the scrapers;

[0008] An annular tube is arranged outside the installation frame, and the outer side surface of the annular tube is penetrated and fixed with air blowing heads distributed in an annular array.

[0009] Furthermore, the two side surfaces of the cover plate are symmetrically fixed with limit rods, and an arc plate is commonly inserted outside the two limit rods on the same side, and the cover plate and the arc plates on both sides thereof jointly constitute a circular plate.

[0010] Furthermore, clamping plates are fixed to the bottom ends of the two arc surfaces outside the cover plate, and a locking bolt is threadedly penetrated and screwed into each clamping plate.

[0011] Furthermore, a base plate is fixed outside the installation frame, and a connecting piece is fixed between the outer wall of the base plate and the inner ring wall of the ring tube.

[0012] Furthermore, a soft air pipe is fixedly passed through the upper part of the annular tube, and one end of the soft air pipe away from the annular tube passes through an arc plate and extends upward.

[0013] Furthermore, the rotation radius of the rake rod and the scraper is equal, and the rotation radius of the wire brush is larger than the rotation radius of the rake rod.

[0014] Furthermore, the rotation radius of the annular tube and the air blowing head is smaller than the rotation radius of the wire brush.

[0015] The utility model has the following beneficial effects:

[0016] The utility model solves the problem that the dust accumulation in the boiler flue cannot be cleaned comprehensively by arranging a screw motor, a transmission screw, a cleaning shaft, a rake rod, a scraper, a wire brush, a ring pipe and an air blowing head. When cleaning the dust accumulation in the boiler flue, a cover plate is arranged on the flue opening, a structure at the bottom of the transmission screw rod extends into the flue, the cleaning motor is started, the cleaning shaft is rotated, thereby the rake rod, the scraper and the wire brush are rotated synchronously, the dust accumulation and coke blocks in the boiler flue are firstly scraped off with tooth marks by the rake rod or directly broken and dropped, the stubborn ones are then scraped off by the scraper, and finally the wire brush is brushed against the inner wall of the flue, and finally the compressed air is input into the ring pipe and blown out from the air blowing head to the inner wall of the flue, and finally the adhered floating dust is blown off, thereby realizing a sufficient dust accumulation cleaning operation. In this process, the screw motor drives the transmission screw rod to gradually descend, so that the part driven by the cleaning motor gradually descends, thereby realizing a step-by-step cleaning from top to bottom.

[0017] The utility model solves the problem of lack of airtightness when cleaning the boiler ash by arranging the cover plate and the arc plate; when cleaning the boiler flue ash, the cover plate is arranged on the flue opening, and the arc plates are plugged into the two sides to completely close the flue opening, so that no floating ash will escape to the outside when cleaning the ash, thereby ensuring a better cleaning environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0019] Figure 1 A three-dimensional diagram of a boiler tail flue dust cleaning structure;

[0020] Figure 2 This is the connection diagram of the cover plate and the screw motor;

[0021] Figure 3 To clean the connection diagram of the motor and its drive part;

[0022] Figure 4 This is the structural diagram of the ring tube.

[0023] Reference numerals:

[0024] 1. Cover plate; 101. Arc plate; 102. Limiting rod; 103. Clamping plate; 1031. Locking bolt; 2. Screw motor; 201. Transmission screw; 3. Mounting frame; 301. Cleaning motor; 302. Cleaning shaft; 303. Rake rod; 304. Scraper; 305. Wire brush; 4. Ring tube; 401. Blowing head; 402. Soft air pipe; 403. Base plate; 4031. Connector. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] See also Figure 1-4 As shown, the utility model is a dust cleaning structure for the flue at the tail end of a boiler, comprising a cover plate 1, a screw motor 2, a mounting frame 3 and a ring pipe 4, a screw motor 2 is fixed at the center of the upper end of the cover plate 1, and a transmission screw 201 is rotatably connected in the screw motor 2, a mounting frame 3 is fixed at the bottom of the transmission screw 201, a cleaning motor 301 is fixed in the inner cavity of the mounting frame 3, and the output shaft of the cleaning motor 301 passes through the bottom end of the mounting frame 3 and is fixed with a cleaning shaft 302, symmetrically distributed rake rods 303 are fixed on the periphery of the cleaning shaft 302, and symmetrically distributed scrapers 304 are fixed on the periphery of the cleaning shaft 302 located above the rake rods 303, and symmetrically distributed steel wire brushes 305 are fixed on the periphery of the cleaning shaft 302 above the scrapers 304;

[0027] The cover plate 1 is arranged on the boiler flue that needs to be cleaned, and the structures below the cover plate 1 are all extended into the flue cavity. When cleaning, the cleaning motor 301 in the frame 3 is first installed to work, and the cleaning shaft 302 rotates, so that the rake rod 303, the scraper 304 and the wire brush 305 rotate synchronously, and the ash and coke blocks in the boiler flue are first scraped by the rake rod 303 to remove the tooth marks or directly broken and dropped, and the stubborn ones are scraped by the scraper 304, and finally the wire brush 305 is brushed against the inner wall of the flue to brush and remove, so as to realize the step-by-step cleaning operation from large blocks to small blocks, and then the wire brush 305 is used for brushing to realize a more comprehensive cleaning operation;

[0028] Secondly, in this process, the screw motor 2 drives the transmission screw 201 to gradually descend, so that the cleaning motor 301 and the parts driven by it gradually descend, thereby realizing the step-by-step cleaning from top to bottom;

[0029] An annular tube 4 is arranged on the outside of the mounting frame 3, and the outer side surface of the annular tube 4 is fixed with air blowing heads 401 distributed in a circular array; there may be floating dust and the like adhering to the inner wall of the flue after cleaning. At this time, the compressed air input into the annular tube 4 is ejected from the air blowing heads 401 to achieve a fast and comprehensive blowing operation. Because the bottom end of the transmission screw 201 is fixed to the mounting frame 3, when the transmission screw 201 drives the mounting frame 3 to descend, a certain rotation will be generated, thereby causing the annular tube 4 and the air blowing heads 401 outside it to rotate, thereby achieving a comprehensive blowing operation.

[0030] The two sides of the cover plate 1 are symmetrically fixed with limit rods 102, and the two limit rods 102 on the same side are commonly plugged with an arc plate 101, and the cover plate 1 and the arc plates 101 on both sides together form a circular plate;

[0031] Before the cleaning operation begins, the cover plate 1 is placed on the flue opening that needs to be cleaned, and then the arc plate 101 is plugged into the outer side of the limiting plug rod 102 to form a circular plate to completely block the upper end of the flue opening to prevent floating dust from escaping during the cleaning operation.

[0032] The bottom ends of the two arc surfaces outside the cover plate 1 are fixed with clamping plates 103, and each clamping plate 103 is threadedly penetrated and screwed with a locking bolt 1031;

[0033] The clamping plate 103 is located outside the flue opening and is clamped outside the flue by screwing the locking bolts 1031 to ensure that the position is centered and stable.

[0034] A base plate 403 is fixed outside the mounting frame 3 , and a connector 4031 is fixed between the outer wall of the base plate 403 and the inner wall of the annular tube 4 ; the base plate 403 and the annular tube 4 are connected by the connector 4031 , so that the annular tube 4 is stably located outside the mounting frame 3 .

[0035] A soft air pipe 402 is also fixedly passed through the upper part of the ring pipe 4, and one end of the soft air pipe 402 away from the ring pipe 4 passes through an arc plate 101 and extends upward;

[0036] One end of the soft air pipe 402 extending out of the arc plate 101 is connected to an external air compression device (such as an air compressor) to input compressed air into the ring pipe 4. The soft air pipe 402 has a sufficient length to cooperate with the lifting and lowering of the transmission screw 201.

[0037] The rotation radius of the rake bar 303 and the scraper 304 is equal, and the rotation radius of the wire brush 305 is greater than the rotation radius of the rake bar 303 .

[0038] The rotation radius of the ring tube 4 and the blowing head 401 is smaller than that of the wire brush 305; only the wire brush 305 contacts the inner wall of the flue, while the rest, such as the rake rod 303 and the scraper rod, have a certain gap with the inner wall of the flue to avoid causing greater wear to the flue.

[0039] The specific working principle of the utility model is as follows: first, before the cleaning operation begins, the cover plate 1 is placed on the flue opening to be cleaned, and then the arc plate 101 is plugged outside the limiting plug rod 102 on the side thereof to completely block the upper end of the flue opening, and the structures below the cover plate 1 are all extended into the flue cavity. When cleaning, the cleaning motor 301 in the frame 3 is first installed to work, and the cleaning shaft 302 rotates, so that the rake rod 303, the scraper 304 and the wire brush 305 rotate synchronously, and the accumulated ash and coke blocks in the boiler flue are first scraped off by the rake rod 303 to remove tooth marks or directly broken and dropped, and then scraped off by the scraper 304, and finally brushed off by the wire brush 305 against the inner wall of the flue;

[0040] One end of the soft air pipe 402 extending out of the arc plate 101 is connected to an external air compression device to input compressed air into the annular tube 4. At this time, the compressed air input into the annular tube 4 is ejected from the air blowing head 401 to achieve a fast and comprehensive blowing operation.

[0041] During this process, the screw motor 2 drives the transmission screw 201 to gradually descend, so that the annular tube 4 and the installation frame and the lower structure gradually descend, thereby realizing gradual cleaning from top to bottom.

[0042] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A boiler tail flue dust cleaning structure, comprising a cover plate (1), a screw motor (2), a mounting frame (3) and a ring pipe (4), characterized in that: A screw motor (2) is fixed at the center of the upper end of the cover plate (1), and a transmission screw (201) is rotatably connected to the screw motor (2), a mounting frame (3) is fixed to the bottom of the transmission screw (201), a cleaning motor (301) is fixed in the inner cavity of the mounting frame (3), and the output shaft of the cleaning motor (301) passes through the bottom end of the mounting frame (3) and is fixed with a cleaning shaft (302), symmetrically distributed rake rods (303) are fixed to the outer periphery of the cleaning shaft (302), and symmetrically distributed scrapers (304) are fixed to the outer periphery of the cleaning shaft (302) above the rake rods (303), and symmetrically distributed steel wire brushes (305) are fixed to the outer periphery of the cleaning shaft (302) above the scrapers (304); An annular tube (4) is arranged outside the installation frame (3), and blowing heads (401) distributed in an annular array are fixedly passed through the outer side surface of the annular tube (4).

2. A boiler tail flue dust cleaning structure according to claim 1, characterized in that: The two side surfaces of the cover plate (1) are symmetrically fixed with limit rods (102); an arc plate (101) is commonly inserted outside the two limit rods (102) on the same side; the cover plate (1) and the arc plates (101) on both sides thereof jointly form a circular plate.

3. A boiler tail flue dust cleaning structure according to claim 1, characterized in that: Clamps (103) are fixed to the bottom ends of the two outer arc surfaces of the cover plate (1), and each clamp (103) is threadedly penetrated and screwed with a locking bolt (1031).

4. The dust cleaning structure for the tail flue of a boiler according to claim 1 is characterized by: A base plate (403) is fixed outside the installation frame (3), and a connecting piece (4031) is fixed between the outer wall of the base plate (403) and the inner ring wall of the ring tube (4).

5. The dust cleaning structure for the tail flue of a boiler according to claim 2 is characterized by: A soft air pipe (402) is also fixedly passed through the upper part of the annular tube (4), and one end of the soft air pipe (402) away from the annular tube (4) passes through an arc plate (101) and extends upward.

6. The dust cleaning structure for the tail flue of a boiler according to claim 1, characterized in that: The rotation radius of the rake bar (303) and the scraper (304) is equal, and the rotation radius of the wire brush (305) is greater than the rotation radius of the rake bar (303).

7. The dust cleaning structure for the tail flue of a boiler according to claim 1, characterized in that: The rotation radius of the annular tube (4) and the air blowing head (401) is smaller than the rotation radius of the wire brush (305).

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