Totally-closed negative-pressure dust suppression device for boiler slagging chamber

Abstract

The invention belongs to the technical field of dust collection equipment, and discloses a boiler slagging chamber totally-closed negative pressure dust suppression device which comprises a slagging chamber and a dust collection box and further comprises a driving mechanism, the driving mechanism is arranged in the inner wall of the dust collection box, and a negative pressure fan is arranged on the outer wall of the dust collection box through a pipeline; the spraying module is arranged in the slag discharging chamber; the screening mechanism is arranged on the outer wall of the bottom end of the dust suction box; wherein the driving mechanism comprises a motor, an output shaft of the motor is fixedly connected with a rotating rod, and the inner wall of the rotating rod is slidably connected with a moving rod; through cooperation of the motor, the rotating rod and other structures, the motor is started in the dust collection process, multiple sets of filter cartridges can be driven to rotate, the problem that the filtering effect is affected due to blockage caused by large dust collection load of a single filter cartridge is solved, the motor can drive a scraper to rotate to scrape and clean impurities in the dust collection box, and the dust collection efficiency is improved. And the working intensity of manual cleaning is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of dust collection equipment, and particularly relates to a full-closed negative pressure dust suppression device for a boiler slag discharge chamber. BACKGROUND

[0002] The boiler slag discharge chamber is a special space for collecting, temporarily storing and discharging solid residues generated after fuel combustion in a boiler system, and the residues can be transported to the outside for treatment through a slag discharge device, which is an important component for ensuring the continuous and stable operation of the boiler and avoiding the accumulation and blockage of the slag in the furnace.

[0003] In some existing technologies, the slag in the slag discharge chamber is transported by a slag removal vehicle, and the door cannot be closed to form an effective closed space due to the movement of the vehicle during slag discharge, resulting in a large amount of dust during slag discharge, which causes dust pollution in the production site. In order to prevent large-area pollution, a negative pressure dust collection system is used for dust collection in some slag discharge chambers. A plurality of filter cartridges are arranged in the negative pressure dust collection system to filter the air sucked in. However, the different dust loads between the filter cartridges can cause the filter cartridges close to the dust collection pipe to be easily blocked and affect the filtering effect. In addition, dust and impurities can adhere to the inner wall of the negative pressure dust collection bin, which needs to be cleaned manually by the operator, resulting in a large working intensity. Therefore, the full-closed negative pressure dust suppression device for the boiler slag discharge chamber is proposed to solve the above problems. SUMMARY

[0004] To solve the problems in the background art, the application provides a full-closed negative pressure dust suppression device for a boiler slag discharge chamber.

[0005] To achieve the above purpose, the application provides the following technical scheme: a full-closed negative pressure dust suppression device for a boiler slag discharge chamber, comprising a slag discharge chamber and a dust collection box, further comprising: a driving mechanism arranged in the inner wall of the dust collection box, and the outer wall of the dust collection box is provided with a negative pressure fan through a pipeline; a spraying module arranged in the interior of the slag discharge chamber; a screening mechanism arranged at the bottom outer wall of the dust collection box.

[0006] The driving mechanism comprises a motor, the output shaft of the motor is fixedly connected with a rotating rod, the inner wall of the rotating rod is slidably connected with a moving rod, and the outer wall of the moving rod is fixedly connected with a pull rod.

[0007] Preferably, the outer wall of the dust collection box is fixedly connected with an air pipe, the air pipe is fixedly connected with the outer wall of the slag discharge chamber, and the two ends of the air pipe are respectively connected with the negative pressure fan and the outer wall of the dust collection box.

[0008] Preferably, the inner wall of the moving rod is elastically connected with the protrusion through the elastic piece A, the outer wall of the rotating rod is provided with a groove, the outer wall of the rotating rod is fixedly connected with the filter cartridge, and the outer wall of the rotating rod is provided with the cleaning assembly.

[0009] Preferably, the motor is fixedly connected to the top outer wall of the dust collection box, the rotating rod is rotatably connected to the top inner wall of the dust collection box, the pull rod penetrates through the outer wall of the rotating rod, and the protrusion is clamped with the groove.

[0010] Preferably, one end of the elastic piece A is fixedly connected to the outer wall of the protrusion, the other end of the elastic piece A is fixedly connected to the inner wall of the moving rod, and the protrusion is slidably connected in the inner wall of the moving rod.

[0011] Preferably, the cleaning assembly comprises a scraper, the scraper is hinged to the outer wall of the rotating rod through a support rod, the outer wall of the support rod is hinged with a hinge rod, and the outer wall of the rotating rod is slidably connected with a telescopic rod.

[0012] Preferably, the two ends of the support rod are respectively hinged to the inner walls of the rotating rod and the scraper, one end of the hinge rod is hinged to the outer wall of the moving rod, the other end of the hinge rod is hinged to the inner wall of the support rod, and the movable end of the telescopic rod is fixedly connected to the outer wall of the scraper.

[0013] Preferably, the wedge is elastically connected in the inner wall of the sieve plate through the elastic piece B, the inner wall of the sieve plate is rotatably connected with a rotating wheel, the outer wall of the rotating wheel is wound with a pull rope, the inner wall of the sieve plate is slidably connected with a pushing block, and the inner wall of the fixed frame is provided with a square groove.

[0014] Preferably, the fixed frame is fixedly connected to the bottom outer wall of the dust collection box, the two ends of the pull rope are respectively fixedly connected to the outer walls of the pushing block and the wedge, and the wedge is clamped with the square groove.

[0015] Preferably, one end of the elastic piece B is fixedly connected to the outer wall of the wedge, the other end of the elastic piece B is fixedly connected to the outer wall of the pushing block, and the wedge is slidably connected in the inner wall of the sieve plate.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] Through the cooperation of the motor and the rotating rod and other structures, the motor is started during the dust collection process, a plurality of filter cartridges are driven to rotate, and the filter cartridges are alternately positioned corresponding to the air pipe, thereby avoiding the problem that a single filter cartridge is blocked due to too much dust collection load and affects the filtering effect, and the motor can drive the scraper to rotate to scrape and clean the impurities in the dust collection box, thereby reducing the work intensity of manual cleaning and reducing the labor;

[0018] The support rod and the telescopic rod are cooperated, the hinged rod is overturned by moving the moving rod downwards, the scraper is moved and is separated from the inner wall of the dust suction box, the scraper is prevented from being contacted and rubbed with the dust suction box for a long time during the dust suction process, the abrasion of the scraper is reduced, and the service life is prolonged;

[0019] The fixed frame and the wedge-shaped block are cooperated, the screen plate is removed by pulling the pull block, the screen plate is inserted into the fixed frame, the wedge-shaped block is clamped with the square slot, and the installation is completed, the operation is simple, and the cleaning efficiency of the operator is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the application;

[0021] Figure 2 It is a schematic diagram of the sectional structure of the dust suction box of the application;

[0022] Figure 3 It is a schematic diagram of the driving mechanism structure of the application;

[0023] Figure 4 It is a schematic diagram of the sectional structure of the rotating rod of the application;

[0024] Figure 5 It is a schematic diagram of the sectional structure of the dust suction box and the rotating rod of the application;

[0025] Figure 6 It is a schematic diagram of the sectional structure of the rotating rod and the moving rod of the application;

[0026] Figure 7 It is a schematic diagram of the sectional structure of the fixed frame and the screen plate of the application.

[0027] In the drawing: 1, slag chamber; 2, dust suction box; 3, driving mechanism; 31, motor; 32, filter cartridge; 33, rotating rod; 34, groove; 35, moving rod; 36, pull rod; 37, elastic member A; 38, protruding block; 301, scraper; 302, support rod; 303, hinged rod; 304, telescopic rod; 4, screening mechanism; 41, fixed frame; 42, square slot; 43, screen plate; 44, elastic member B; 45, wedge-shaped block; 46, pull rope; 47, rotating wheel; 48, pull block; 5, negative pressure fan; 6, spraying module; 7, air pipe. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0029] As shown in Figures 1 to 7 The present application provides a full-closed negative pressure dust suppression device for a boiler slag discharge chamber, which comprises a slag discharge chamber 1 and a dust suction box 2, and further comprises: a driving mechanism 3 arranged in the inner wall of the dust suction box 2, the outer wall of the dust suction box 2 being provided with a negative pressure fan 5 through a pipeline; a spraying module 6 arranged in the interior of the slag discharge chamber 1; and a screening mechanism 4 arranged at the bottom outer wall of the dust suction box 2.

[0030] The driving mechanism 3 comprises a motor 31, the output shaft of the motor 31 being fixedly connected with a rotating rod 33, the inner wall of the rotating rod 33 being slidably connected with a moving rod 35, and the outer wall of the moving rod 35 being fixedly connected with a pull rod 36. The screening mechanism 4 comprises a fixed frame 41, the inner wall of the fixed frame 41 being clamped with a sieve plate 43, and the inner wall of the sieve plate 43 being slidably connected with a wedge-shaped block 45.

[0031] As shown in Figures 1 to 2 The outer wall of the dust suction box 2 is fixedly connected with an air pipe 7, the air pipe 7 is fixedly connected with the outer wall of the slag discharge chamber 1, and the two ends of the air pipe 7 are respectively connected with the negative pressure fan 5 and the outer wall of the dust suction box 2.

[0032] By adopting the above scheme: the negative pressure fan 5, the dust suction box 2, the filter cartridge 32 and the air pipe 7 form a main body of a negative pressure dust suction device, an electromagnetic valve is arranged at the opening below the dust suction box 2, the electromagnetic valve is closed when the negative pressure fan 5 is started, a completely closed space is formed, a negative pressure is formed in the interior of the slag discharge chamber 1 through the dust suction box 2 and the air pipe 7, the dust generated in the slag discharge chamber 1 can be sucked into the dust suction box 2 for filtration, and the clean air after filtration is discharged through the negative pressure fan 5; the spraying module 6 is provided with multiple spray heads, a small amount of water can be sprayed for dust suppression at the same time of the negative pressure dust suction, the dust suppression effect can be further improved in combination with the negative pressure dust suction, a large amount of water is not needed for dust suppression, the problem that the water for dust suppression is easy to freeze in winter when the temperature is below zero, the slag discharge vehicle is seriously caked when discharging slag, and the slag discharge efficiency is low is avoided.

[0033] As shown in Figures 3 to 6 The inner wall of the moving rod 35 is elastically connected with a protrusion 38 through an elastic member A 37, the outer wall of the rotating rod 33 is provided with a groove 34, the outer wall of the rotating rod 33 is fixedly connected with the filter cartridge 32, and the outer wall of the rotating rod 33 is provided with a cleaning assembly.

[0034] With the above scheme: in the process of negative pressure dust collection, the dust in the slag discharge chamber 1 enters the dust collection box 2 through the air pipe 7, and is discharged after being filtered by the filter cylinder 32. Since the position of the air pipe 7 is fixed, the driving mechanism 3 can continuously drive multiple groups of filter cylinders 32 to rotate during the dust collection process, so that multiple groups of filter cylinders 32 rotate in turn to correspond to the position of the air pipe 7, balancing the dust collection amount of each filter cylinder 32, and avoiding the problem that the dust collection amount of the filter cylinder 32 near the air pipe 7 is too much, which affects the dust collection effect in the long-term use. The filter cylinder 32 is made of metal fiber material, which can better avoid damage and spontaneous combustion caused by high temperature of the slag.

[0035] As shown in Figures 3 to 6 , the motor 31 is fixedly connected to the top outer wall of the dust collection box 2, the rotating rod 33 is rotatably connected to the top inner wall of the dust collection box 2, the pull rod 36 penetrates the outer wall of the rotating rod 33, the protrusion 38 is clamped with the groove 34, one end of the elastic member A 37 is fixedly connected to the outer wall of the protrusion 38, the other end of the elastic member A 37 is fixedly connected to the inner wall of the moving rod 35, and the protrusion 38 is slidingly connected in the inner wall of the moving rod 35.

[0036] With the above scheme: when the motor 31 starts, the output shaft of the motor 31 drives the rotating rod 33 to rotate synchronously, and then drives multiple groups of filter cylinders 32 on the outer wall of the rotating rod 33 to rotate synchronously. The groove 34 is provided with two groups of upper and lower grooves. When the moving rod 35 moves up and down in the inner wall of the rotating rod 33, the protrusion 38 is clamped with the groove 34 to fix the position of the moving rod 35, and the moving rod 35 can be fixed at the upper and lower positions. After the protrusion 38 is clamped and penetrates the groove 34, the operator can manually press the protrusion 38 to move it into the inner wall of the moving rod 35, compress the elastic member A 37, and then release the limiting of the moving rod 35. Pulling the pull rod 36 can move the moving rod 35 up and down.

[0037] As shown in Figures 4 to 5 , the cleaning assembly includes a scraper 301, the scraper 301 is hinged to the outer wall of the rotating rod 33 through a support rod 302, the outer wall of the support rod 302 is hinged with a hinge rod 303, and the outer wall of the rotating rod 33 is slidingly connected with an extension rod 304.

[0038] With the above scheme: the scraper 301 can be attached to the inner wall of the dust collection box 2, and the driving mechanism 3 can also drive the scraper 301 to rotate. When the scraper 301 rotates along the inner wall of the dust collection box 2, it can scrape and clean the slag dust attached to the inner wall of the dust collection box 2, thereby reducing the work intensity of manual cleaning and saving manpower. When the moving rod 35 moves up and down, the state of the scraper 301 can be adjusted so that it is attached to the inner wall of the dust collection box 2 or is retracted and is not in contact with the inner wall of the dust collection box 2. During the dust collection process, when the filter cylinder 32 rotates continuously, the scraper 301 can be retracted so that it does not always rub against the dust collection box 2, thereby reducing the wear of the scraper 301 when it is not needed for scraping and cleaning.

[0039] As shown in Figures 4 to 5As shown, the two ends of the support rod 302 are respectively hinged with the inner wall of the scraping plate 301 and the rotating rod 33, one end of the hinged rod 303 is hinged with the outer wall of the moving rod 35, the other end of the hinged rod 303 is hinged with the inner wall of the support rod 302, and the movable end of the telescopic rod 304 is fixedly connected with the outer wall of the scraping plate 301.

[0040] By the above scheme: by moving the moving rod 35 up and down, the moving rod 35 can drive the hinged rod 303 connected with one end to move synchronously, the other end of the hinged rod 303 will drive the support rod 302 to overturn, and then drive the scraping plate 301 connected with the support rod 302 to move, since the scraping plate 301 is fixed on the outer wall of the rotating rod 33 through the telescopic rod 304, and the telescopic rod 304 can only move vertically on the outer wall of the rotating rod 33, the telescopic rod 304 can guide the scraping plate 301 to move horizontally, so that the scraping plate 301 can keep vertical state when the support rod 302 overturns, when the moving rod 35 moves up, the hinged rod 303 will drive the support rod 302 to overturn upward, so that the scraping plate 301 keeps vertical state and moves to the upper oblique side, until it is attached to the inner wall of the dust collection box 2, and then it can be scraped and cleaned, and when the moving rod 35 moves down, the support rod 302 will overturn downward, so that the scraping plate 301 moves to the lower oblique side, and then it can be separated from the inner wall of the dust collection box 2, so that the scraping plate 301 will not rub against the inner wall of the dust collection box 2 when the motor 31 starts.

[0041] As shown in Figure 7 , the wedge block 45 is elastically connected in the inner wall of the sieve plate 43 through the elastic element B44, the inner wall of the sieve plate 43 is rotationally connected with a rotating wheel 47, the outer wall of the rotating wheel 47 is provided with a pull rope 46, and the inner wall of the sieve plate 43 is slidingly connected with a pushing block 48, and the inner wall of the fixed frame 41 is provided with a square slot 42.

[0042] By the above scheme: when the electromagnetic valve in the opening below the dust collection box 2 is opened, the dust and impurities scraped by the scraping plate 301 will fall from the opening, be screened by the screening mechanism 4, and then be discharged, the screening mechanism 4 can screen the slag or metal particles with larger diameter, and the dust and impurities with smaller particles will not be left on the sieve plate 43, and the slag or metal particles can be recycled or used in other ways; the sieve plate 43 can be conveniently and quickly installed and removed in the fixed frame 41, so that the operator can clean it, and the use efficiency is improved.

[0043] As shown in Figure 7 , the fixed frame 41 is fixedly connected to the bottom outer wall of the dust collection box 2, the two ends of the pull rope 46 are respectively fixedly connected to the outer wall of the pushing block 48 and the wedge block 45, and the wedge block 45 is clamped with the square slot 42; one end of the elastic element B44 is fixedly connected to the outer wall of the wedge block 45, the other end of the elastic element B44 is fixedly connected to the outer wall of the pushing block 48, and the wedge block 45 is slidingly connected in the inner wall of the sieve plate 43.

[0044] Adopt the above scheme: the wedge-shaped block 45 is provided with two groups, when the sieve plate 43 is installed in the fixed frame 41, the curved surface of the wedge-shaped block 45 will be in contact with the inner wall of the fixed frame 41, and the wedge-shaped block 45 will be moved to the inner wall of the sieve plate 43 under the extrusion of the inner wall, and the elastic element B 44 is compressed, when the sieve plate 43 is completely inserted into the fixed frame 41, the wedge-shaped block 45 is ejected under the elastic force of the elastic element B 44 and is inserted into the inner wall of the square groove 42, that is, the fixation of the sieve plate 43 is completed; when disassembling, the operator can move the two groups of push blocks 48 to the middle, move one end of the pull rope 46, change the pulling direction of the pull rope 46 after passing through the rotating wheel 47, and the rotating wheel 47 will rotate to reduce the abrasion between the pull rope 46, and the other end of the pull rope 46 will drive the wedge-shaped block 45 to move to the inner wall of the sieve plate 43, and the wedge-shaped block 45 will be separated from the square groove 42, that is, the sieve plate 43 can be pulled out and taken off, and the slag or metal particles on it are treated, and the operation is simple.

[0045] The working principle and use process of the present application are as follows:

[0046] When the slag is discharged in the slag discharging chamber 1, the negative pressure fan 5 can be started, a negative pressure environment is established in the slag discharging chamber 1 through the air pipe 7, and the spray module 6 is started, a plurality of nozzles are opened to spray a small amount of water mist, and the slag dust and other impurities generated in the slag discharging process are sucked into the dust collection box 2 under the action of negative pressure; the motor 31 is started to drive the rotating rod 33 and the plurality of groups of metal fiber filter cartridges 32 on the outer wall to rotate, so that the filter cartridges 32 are correspondingly arranged with the outlet of the air pipe 7 in turn, the dust collection amount of each group of filter cartridges is balanced, local overload blockage is avoided, and the filtering effect is affected; after the dust-containing gas is filtered through the filter cartridges 32, clean air is discharged through the negative pressure fan 5, and the dust is intercepted on the surface of the filter cartridges and the inner wall of the dust collection box 2; the water mist of the spray module 6 enhances the dust agglomeration, improves the negative pressure dust collection efficiency, and a small amount of water mist will not cause a large amount of ice due to the temperature below zero in winter.

[0047] After the slag is discharged, the operator can first stop the motor 31, press the protrusion 38 manually, compress the elastic element A 37, pull the pull rod 36 to move the moving rod 35 upward, the protrusion 38 is clamped into the groove 34 above the rotating rod 33 to be fixed, the moving rod 35 moves upward to drive the hinged rod 303 to push the support rod 302 to flip upward, the scraper 301 keeps a vertical state and moves to the obliquely upward under the guidance of the telescopic rod 304, and is attached to the inner wall of the dust collection box 2, and then the motor 31 is started to drive the rotating rod 33 to rotate, the rotating rod 33 drives the moving rod 35 to rotate, the scraper 301 rotates along the inner wall of the dust collection box 2, and the dust and impurities adhered are scraped off, and at the same time, the rotating filter cartridges 32 are indirectly contacted with the scraper, and the surface residual dust is cleaned.

[0048] After the scraping is completed, the electromagnetic valve below the dust suction box 2 can be opened, and the cleaned dust and impurities fall onto the screen plate 43 of the screening mechanism 4. The screen plate 43 can intercept large-diameter slag blocks, metal particles, coarse fiber impurities, and the like, and fine dust falls into the external collection device. The operator can move the middle push block 48, drive the wedge-shaped block 45 to move through the pull rope 46, and make the wedge-shaped block 45 and the square groove 42 disengage, so that the screen plate 43 can be removed to clean the large impurities intercepted. After cleaning is completed, the screen plate 43 is reinserted into the fixed frame 41, and the wedge-shaped block 45 is clamped into the square groove 42 under the action of the elastic member B 44, and the fixing is completed. The operation of disassembly and installation is relatively simple, and the use efficiency is improved.

[0049] After the operation is completed, the operator can adjust the moving rod 35 to move downward again, so that the scraper 301 is disengaged from the inner wall of the dust suction box 2, and the protrusion 38 is clamped into the lower groove 34. Thus, the scraper 301 can be prevented from being worn due to long-time contact and friction with the inner wall of the dust suction box 2 in the subsequent dust suction process, and the service life of the scraper 301 is improved.

[0050] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus that includes a list of elements does not only include those elements, but also includes other elements not explicitly listed, or inherent to such a process, method, article, or apparatus.

[0051] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A fully enclosed negative pressure dust suppression device for a boiler slag discharge chamber, comprising a slag discharge chamber (1) and a dust collection box (2), characterized in that: Also includes: A driving mechanism (3), the driving mechanism (3) being arranged in the inner wall of the dust collection box (2), and a negative pressure fan (5) being arranged on the outer wall of the dust collection box (2) via a pipeline; A spray module (6), the spray module (6) being arranged inside the slag tapping chamber (1); A screening mechanism (4), the screening mechanism (4) being arranged on the outer wall of the bottom end of the dust collection box (2); The driving mechanism (3) comprises a motor (31), an output shaft of the motor (31) is fixedly connected to a rotating rod (33), an inner wall of the rotating rod (33) is slidably connected to a moving rod (35), and an outer wall of the moving rod (35) is fixedly connected to a pull rod (36); The screening mechanism (4) comprises a fixed frame (41), the inner wall of the fixed frame (41) is clamped with a screen plate (43), and the inner wall of the screen plate (43) is slidably connected with a wedge block (45).

2. The fully enclosed negative pressure dust suppression device for the boiler slag discharge chamber according to claim 1, characterized in that: The outer wall of the dust collection box (2) is fixedly connected with an air duct (7), and the air duct (7) is fixedly connected to the outer wall of the slag discharge chamber (1). The two ends of the air duct (7) are respectively connected to the outer wall of the negative pressure fan (5) and the dust collection box (2).

3. The fully enclosed negative pressure dust suppression device for a boiler slag discharge chamber according to claim 1, characterized in that: The inner wall of the movable rod (35) is elastically connected to a protrusion (38) via an elastic member A (37); the outer wall of the rotating rod (33) is provided with a groove (34); the outer wall of the rotating rod (33) is fixedly connected to a filter cartridge (32); and the outer wall of the rotating rod (33) is provided with a cleaning assembly.

4. The fully enclosed negative pressure dust suppression device for a boiler slag discharge chamber according to claim 3, characterized in that: The motor (31) is fixedly connected to the top outer wall of the dust box (2), the rotating rod (33) is rotatably connected to the top inner wall of the dust box (2), the pull rod (36) passes through the outer wall of the rotating rod (33), and the protrusion (38) is engaged with the groove (34).

5. The fully enclosed negative pressure dust suppression device for a boiler slag discharge chamber according to claim 3, characterized in that: One end of the elastic member A (37) is fixedly connected to the outer wall of the protrusion (38), and the other end of the elastic member A (37) is fixedly connected to the inner wall of the moving rod (35). The protrusion (38) is slidably connected to the inner wall of the moving rod (35).

6. The fully enclosed negative pressure dust suppression device for a boiler slag discharge chamber according to claim 3, characterized in that: The cleaning assembly comprises a scraper (301), wherein the scraper (301) is hinged to the outer wall of a rotating rod (33) via a support rod (302), the outer wall of the support rod (302) is hinged to a hinge rod (303), and the outer wall of the rotating rod (33) is slidably connected to a telescopic rod (304).

7. The fully enclosed negative pressure dust suppression device for a boiler slag discharge chamber according to claim 6, characterized in that: The two ends of the support rod (302) are hinged to the rotating rod (33) and the inner wall of the scraper (301) respectively, one end of the hinged rod (303) is hinged to the outer wall of the moving rod (35), the other end of the hinged rod (303) is hinged to the inner wall of the support rod (302), and the movable end of the telescopic rod (304) is fixedly connected to the outer wall of the scraper (301).

8. The fully enclosed negative pressure dust suppression device for a boiler slag discharge chamber according to claim 1, characterized in that: The wedge block (45) is elastically connected to the inner wall of the sieve plate (43) through an elastic member B (44); the inner wall of the sieve plate (43) is rotatably connected to a rotating wheel (47); a pull rope (46) is wound around the outer wall of the rotating wheel (47); the inner wall of the sieve plate (43) is slidably connected to a shift block (48); and the inner wall of the fixed frame (41) is provided with a square groove (42).

9. The fully enclosed negative pressure dust suppression device for a boiler slag discharge chamber according to claim 8, characterized in that: The fixing frame (41) is fixedly connected to the outer wall of the bottom end of the dust collection box (2), and the two ends of the pull rope (46) are fixedly connected to the outer walls of the shift block (48) and the wedge block (45), respectively. The wedge block (45) is clamped with the square groove (42).

10. The fully enclosed negative pressure dust suppression device for a boiler slag discharge chamber according to claim 8, characterized in that: One end of the elastic member B (44) is fixedly connected to the outer wall of the wedge block (45), and the other end of the elastic member B (44) is fixedly connected to the outer wall of the shift block (48). The wedge block (45) is slidably connected to the inner wall of the screen plate (43).

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