A kind of anti-blocking device suitable for boiler air preheater

Abstract

The present application relates to the technical fields of air preheater anti-blocking device, and particularly relates to a kind of anti-blocking device suitable for boiler air preheater, the present application is used to solve the technical problems that most of the existing anti-blocking device suitable for boiler air preheater is installed on air preheater by bolt when in use, the steps of its installation and disassembly are more cumbersome, and it is inconvenient to disassemble and clean, including boiler air preheater body and positioning seat, the boiler air preheater body is composed of two interval symmetrical installation seats and preheating pipes, a plurality of preheating pipes are connected between the two installation seats, and the number of each group of preheating pipes is five, wherein one installation seat top is provided with a fixed plate by a fixed column, and the bottom of the fixed plate is provided with a movable rod symmetrically;The beneficial effects of the present application are that the installation and disassembly of the anti-blocking structure can be quickly and conveniently completed, and the anti-blocking structure can be conveniently disassembled and cleaned.

Description

Technical Field

[0001] This invention relates to the technical field of air preheater anti-clogging devices, specifically an anti-clogging device suitable for boiler air preheaters. Background Technology

[0002] An air preheater is a heat exchange surface in the boiler's tail flue where the flue gas is preheated to a certain temperature by internal heat exchange fins. It is a device used to improve the boiler's heat exchange performance and reduce energy consumption. During the use of an air preheater, anti-ash-clogging devices are required to prevent ash blockage inside its pipes.

[0003] Most existing anti-clogging devices for boiler air preheaters are installed on the air preheater using bolts, which is cumbersome to install and remove, making it inconvenient to disassemble and clean. In addition, most existing anti-clogging devices for boiler air preheaters filter particulate impurities in the flue gas through a filter screen. As time goes by, the impurities adhering to the inner wall of the inlet heat transfer pipe and the filter screen will accumulate too much and eventually cause the air preheater to clog, reducing the working efficiency of the air preheater. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-clogging device suitable for boiler air preheaters. This addresses the problem that most existing anti-clogging devices for boiler air preheaters rely on bolts for installation and disassembly, making cleaning difficult. Furthermore, existing devices often filter particulate matter from the flue gas using filters, leading to excessive accumulation of impurities on the inner wall of the inlet heat transfer pipes and on the filters over time, ultimately causing blockage and reducing air preheater efficiency.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An anti-clogging device for a boiler air preheater includes a boiler air preheater body and a positioning seat. The boiler air preheater body consists of two symmetrically spaced mounting seats and preheating pipes. Multiple sets of preheating pipes are connected through the two mounting seats at intervals, and each set contains five preheating pipes. A fixing plate is mounted on the top of one of the mounting seats via a fixing column. Movable rods are symmetrically spaced at the bottom of the fixing plate. Movable plates are fitted on the two movable rods. Return springs are symmetrically fitted on the top of the movable plates and mounted on the movable rods. The end of the return spring away from the movable plate is connected to the fixing plate. A heat transfer cavity is provided on the inner wall of the positioning seat on the side away from the mounting seat. A connecting pipe connected to the preheating pipes is provided on the side of the heat transfer cavity near the mounting seat. An air inlet heat transfer pipe connected to the heat transfer cavity is provided on the top of the side of the positioning seat away from the mounting seat.

[0007] As a further improvement of the present invention: symmetrical support rods are provided on both sides of the movable plate perpendicular to the fixed plate; first positioning rods are symmetrically fixedly installed on the outer walls of both ends of the bottom of the movable plate; a fixed connecting rod is fixedly connected to the outer wall of the fixed plate perpendicular to the mounting seat; a placement plate is fixedly installed at the end of the fixed connecting rod away from the fixed plate; a first electric telescopic rod is provided on the top of the placement plate; a first connecting plate is provided on the output end of the first electric telescopic rod; a second electric telescopic rod is provided on the outer wall of the first connecting plate away from the mounting seat; a mounting plate is provided on the output end of the second electric telescopic rod; and multiple second positioning rods are equidistantly spaced on the side of the mounting plate near the mounting seat.

[0008] As a further improvement of the present invention: the top of the positioning seat is symmetrically provided with first positioning holes that cooperate with the first positioning rod, and a plurality of second positioning holes are provided at intervals in the middle of the side of the positioning seat perpendicular to the mounting seat, and the second positioning holes cooperate with the second positioning rod.

[0009] As a further improvement of the present invention: a positioning block is fixedly connected inside the air intake heat transfer pipe, a rotating shaft is rotatably connected to the side of the positioning block near the positioning seat, a second connecting plate is symmetrically fixedly connected to the outside of the rotating shaft, a first limiting block is provided inside the second connecting plate, a scraper is fixedly connected to the outside of the first limiting block, a filter screen and a reciprocating screw are respectively provided on the inner wall of the side of the air intake heat transfer pipe near the positioning seat along the direction away from the heat transfer cavity, a movable block is threadedly connected to the outside of the reciprocating screw, and a cleaning frame is fixedly connected to the outside of the movable block.

[0010] As a further improvement of the present invention: a rotary motor is provided on the outer wall of the bottom of the air intake heat transfer pipe near the positioning seat. The output end of the rotary motor is fixedly connected to a transmission worm located inside the air intake heat transfer pipe. A transmission worm wheel is fixedly connected to the outer side of the rotating shaft, and the transmission worm wheel is meshed with the transmission worm.

[0011] As a further improvement of the present invention: the reciprocating lead screw and the transmission worm gear are connected by belt drive, and a third positioning rod is fixedly connected inside the air intake heat transfer pipe, and the third positioning rod is slidably connected to the movable block.

[0012] As a further improvement of the present invention: a third limiting block is symmetrically slidably connected inside the cleaning frame, a cleaning rod is fixedly connected to the outside of the third limiting block, and a second telescopic spring is provided inside the cleaning frame and outside the third limiting block.

[0013] As a further improvement of the present invention: a locking block is slidably connected inside the second connecting plate, a push rod is slidably connected inside the second connecting plate, a sliding block is fixedly connected to one end of the push rod, a sliding groove is opened inside the locking block to cooperate with the sliding block, a second limiting block is fixedly connected to the outside of the locking block, and a first telescopic spring is provided inside the second connecting plate and outside the second limiting block.

[0014] The present invention has the following beneficial effects:

[0015] 1. By using the support rod, movable plate and return spring together, the first positioning rod is inserted into the first positioning hole. By using the first electric telescopic rod, the first connecting plate and the second electric telescopic rod together, the second positioning rod is inserted into the second positioning hole, thus completing the installation of the boiler air preheater body and the anti-blocking structure. When it needs to be disassembled, it can be done by simply reversing the process. The above process can quickly and easily complete the installation and disassembly of the anti-blocking structure, making it easy to disassemble and clean the anti-blocking structure.

[0016] 2. Through the coordinated use of the rotary motor, transmission worm gear, transmission worm wheel, rotating shaft, and second connecting plate, the scraper blade is driven to scrape the dust off the inner wall of the intake heat transfer pipe. Through the coordinated use of the transmission worm gear, reciprocating screw, movable block, cleaning frame, and cleaning rod, the dust on the surface of the filter screen is scraped off and collected. Through the coordinated use of the push rod, sliding block, sliding groove, and locking block, the scraper blade is pulled to move the first limiting block out of the interior of the second connecting plate, so that the scraper blade can be replaced. Through the above process, the impurities adhering to the inner wall of the intake heat transfer pipe and the filter screen are thoroughly cleaned, avoiding excessive accumulation of impurities that may eventually cause air preheater blockage, thus improving the working efficiency of the air preheater. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view sectional view of the boiler air preheater body of the present invention;

[0019] Figure 2 This is a cross-sectional schematic diagram of the connection between the positioning seat and the air inlet heat transfer pipe of the present invention.

[0020] Figure 3 This is a side view of the connection between the placement plate and the fixing plate of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the boiler air preheater body of the present invention;

[0022] Figure 5 For the present invention Figure 2 Enlarged structural diagram at point A;

[0023] Figure 6 For the present invention Figure 2 Enlarged structural diagram at point B;

[0024] Figure 7 This is a schematic diagram of the cleaning frame of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the second connecting plate of the present invention.

[0026] In the diagram: 1. Boiler air preheater body; 2. Preheating pipe; 3. Mounting base; 4. Movable plate; 5. First electric telescopic rod; 6. Placement plate; 7. Return spring; 8. Movable rod; 9. Support rod; 10. Fixed plate; 11. First positioning rod; 12. First connecting plate; 13. Second positioning rod; 14. First positioning hole; 15. Positioning seat; 16. Connecting pipe; 17. Second positioning hole; 18. Heat transfer chamber; 19. Rotating shaft; 20. First limiting block; 21. Second connecting plate; 22. Inlet air heat transfer. 23. Pipe; 24. Fixed connecting rod; 25. Second electric telescopic rod; 26. Transmission worm gear; 27. Transmission worm; 28. Scraper blade; 29. ​​Rotary motor; 30. Filter screen; 31. Cleaning frame; 32. Movable block; 33. Reciprocating screw; 34. Third positioning rod; 35. Positioning block; 36. Sliding block; 37. Push rod; 38. Sliding groove; 39. Locking block; 40. Second limiting block; 41. First telescopic spring; 42. Second telescopic spring; 43. Third limiting block; 44. Cleaning rod. Detailed Implementation

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1:

[0029] Existing anti-clogging devices for boiler air preheaters are mostly bolted to the air preheater, making installation and disassembly cumbersome and inconvenient for cleaning. To solve this problem, the following technical solution is proposed:

[0030] like Figures 1-8 As shown, an anti-clogging device for a boiler air preheater includes a boiler air preheater body 1 and a positioning seat 15. The boiler air preheater body 1 is composed of two symmetrically spaced mounting seats 3 and preheating pipes 2. Multiple sets of preheating pipes 2 are connected through the two mounting seats 3 at intervals, and each set of preheating pipes 2 has five pipes. A fixing plate 10 is installed on the top of one of the mounting seats 3 through a fixing column. Movable rods 8 are symmetrically spaced at the bottom of the fixing plate 10. Movable plates 4 are sleeved on the two movable rods 8. Reset springs 7 are symmetrically sleeved on the top of the movable plates 4 and are sleeved on the movable rods 8. The end of the reset spring 7 away from the movable plate 4 is connected to the fixing plate 10. A heat transfer cavity 18 is provided on the inner wall of the side of the positioning seat 15 away from the mounting seat 3. A connecting pipe 16 connected to the preheating pipes 2 is provided on the side of the heat transfer cavity 18 close to the mounting seat 3. An air inlet heat transfer pipe 22 connected to the heat transfer cavity 18 is provided on the top of the side of the positioning seat 15 away from the mounting seat 3.

[0031] The movable plate 4 is symmetrically provided with support rods 9 on both sides perpendicular to the fixed plate 10. The first positioning rods 11 are symmetrically fixedly installed on the outer walls of the bottom ends of the movable plate 4. The fixed plate 10 is fixedly connected to the outer wall of the side perpendicular to the mounting base 3. The fixed connecting rod 23 is fixedly installed on the end of the fixed connecting rod 23 away from the fixed plate 10. The top of the placement plate 6 is provided with a first electric telescopic rod 5. The output end of the first electric telescopic rod 5 is provided with a first connecting plate 12. The outer wall of the first connecting plate 12 away from the mounting base 3 is provided with a second electric telescopic rod 24. The output end of the second electric telescopic rod 24 is provided with a mounting plate. Multiple second positioning rods 13 are equidistantly provided on the side of the mounting plate close to the mounting base 3.

[0032] The top of the positioning seat 15 is symmetrically provided with first positioning holes 14 that cooperate with the first positioning rod 11. The middle part of the side of the positioning seat 15 perpendicular to the mounting seat 3 is provided with multiple second positioning holes 17, and the second positioning holes 17 cooperate with the second positioning rod 13.

[0033] Move the positioning seat 15 to a position close to the mounting seat 3, pull the support rod 9 downward, and the movable plate 4 stretches the return spring 7 downward, so that the first positioning rod 11 is inserted into the first positioning hole 14. The first electric telescopic rod 5 drives the first connecting plate 12 downward, adjusting the position of the second positioning rod 13. When the second positioning rod 13 is aligned with the second positioning hole 17, the first electric telescopic rod 5 stops working. The second electric telescopic rod 24 drives the second positioning rod 13 to be inserted into the second positioning hole 17, completing the installation of the boiler air preheater body 1 and the anti-blocking structure. When it needs to be disassembled, it can be done by simply reversing the process. The above process can quickly and easily complete the installation and disassembly of the anti-blocking structure, making it convenient to disassemble and clean the anti-blocking structure.

[0034] Example 2:

[0035] Existing anti-clogging devices for boiler air preheaters mostly filter particulate impurities in the flue gas using filter screens. However, over time, these impurities accumulate on the inner walls of the inlet heat transfer pipes and on the filter screens, eventually causing blockage and reducing the air preheater's efficiency. To address this problem, the following technical solution is proposed:

[0036] like Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a positioning block 34 is fixedly connected inside the air intake heat transfer pipe 22. A rotating shaft 19 is rotatably connected to the side of the positioning block 34 near the positioning seat 15. A second connecting plate 21 is symmetrically fixedly connected to the outside of the rotating shaft 19. A first limiting block 20 is provided inside the second connecting plate 21. A scraper 27 is fixedly connected to the outside of the first limiting block 20. A filter screen 29 and a reciprocating screw 32 are respectively provided on the inner wall of the side of the air intake heat transfer pipe 22 near the positioning seat 15 along the direction away from the heat transfer cavity 18. A movable block 31 is threadedly connected to the outside of the reciprocating screw 32. A cleaning frame 30 is fixedly connected to the outside of the movable block 31.

[0037] A rotary motor 28 is provided on the outer wall of the bottom of the intake heat transfer pipe 22 near the positioning seat 15. The output end of the rotary motor 28 is fixedly connected to a transmission worm 26 located inside the intake heat transfer pipe 22. A transmission worm wheel 25 is fixedly connected to the outer side of the rotating shaft 19, and the transmission worm wheel 25 is meshed with the transmission worm 26.

[0038] The reciprocating lead screw 32 is connected to the transmission worm gear 26 via belt drive. The third positioning rod 33 is fixedly connected inside the air intake heat transfer pipe 22, and the third positioning rod 33 is slidably connected to the movable block 31.

[0039] A third limiting block 42 is symmetrically slidably connected inside the cleaning frame 30, and a cleaning rod 43 is fixedly connected to the outside of the third limiting block 42. A second telescopic spring 41 is provided inside the cleaning frame 30 and outside the third limiting block 42.

[0040] The second connecting plate 21 is slidably connected to a locking block 38, and a push rod 36 is slidably connected to the second connecting plate 21. One end of the push rod 36 is fixedly connected to a sliding block 35. The locking block 38 has a sliding groove 37 that works with the sliding block 35. The locking block 38 is fixedly connected to a second limiting block 39 on its outer side. The second connecting plate 21 is provided with a first telescopic spring 40 inside and outside the second limiting block 39.

[0041] By starting the rotary motor 28, the transmission worm 26 is driven to rotate. Under the action of the transmission worm 26 and the transmission worm wheel 25, the rotating shaft 19 is driven to rotate. Through the second connecting plate 21, the scraper blade 27 scrapes against the inner wall of the intake heat transfer pipe 22, causing the intake heat transfer pipe 22 to... Dust on the inner wall is scraped off, and the airflow through the air inlet of the air inlet heat transfer pipe 22 blows the dust onto the surface of the filter screen 29. The transmission worm gear 26 and the reciprocating screw 32 are connected by belt drive, which drives the movable block 31 to move back and forth. With the cooperation of the cleaning frame 30 and the cleaning rod 43, the dust on the surface of the filter screen 29 is scraped off and collected. When it is necessary to replace the scraper blade 27, the push rod 36 is pushed, and the sliding block 35 drives the locking block 38 to move by squeezing the sliding groove 37. The scraper blade 27 is pulled to move the first limiting block 20 out of the interior of the second connecting plate 21, so that the scraper blade 27 can be replaced. Through the above process, the impurities adhering to the inner wall of the air inlet heat transfer pipe 22 and the filter screen 29 are thoroughly cleaned, so as to avoid the accumulation of too many impurities adhering to the inner wall of the air inlet heat transfer pipe 22 and the filter screen 29, which will eventually cause the air preheater to be blocked, thus improving the working efficiency of the air preheater.

[0042] This invention discloses an anti-clogging device suitable for boiler air preheaters, the working process of which is as follows:

[0043] Move the positioning seat 15 to a position close to the mounting seat 3, pull the support rod 9 downward, and the movable plate 4 stretches the return spring 7 downward, so that the first positioning rod 11 is inserted into the first positioning hole 14. The first electric telescopic rod 5 drives the first connecting plate 12 downward to adjust the position of the second positioning rod 13. When the second positioning rod 13 is aligned with the second positioning hole 17, the first electric telescopic rod 5 stops working. The second electric telescopic rod 24 drives the second positioning rod 13 to be inserted into the second positioning hole 17, thus completing the installation of the boiler air preheater body 1 and the anti-blocking structure. When it needs to be disassembled, it can be done by simply reversing the process.

[0044] The rotary motor 28 drives the transmission worm 26 to rotate, which in turn drives the rotating shaft 19 to rotate. The second connecting plate 21 drives the scraper blade 27 to scrape the inner wall of the air intake heat transfer pipe 22, causing the dust on the inner wall of the air intake heat transfer pipe 22 to be scraped off. The airflow through the air intake of the air intake of the air intake heat transfer pipe 22 blows the dust onto the surface of the filter screen 29. The transmission worm 26 is connected to the reciprocating screw 32 through belt drive, which drives the movable block 31 to move back and forth. With the cooperation of the cleaning frame 30 and the cleaning rod 43, the dust on the surface of the filter screen 29 is scraped off and collected. When the scraper blade 27 needs to be replaced, the push rod 36 is pushed, and the sliding block 35 drives the locking block 38 to move through the squeezing sliding groove 37. The scraper blade 27 is pulled to move the first limiting block 20 out of the interior of the second connecting plate 21, so that the scraper blade 27 can be replaced.

[0045] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An anti-clogging device for a boiler air preheater, comprising a boiler air preheater body (1) and a positioning seat (15), characterized in that, The boiler air preheater body (1) consists of two symmetrically spaced mounting seats (3) and preheating tubes (2). Multiple sets of preheating tubes (2) are connected between the two mounting seats (3) at intervals, and each set of preheating tubes (2) has five tubes. A fixing plate (10) is mounted on the top of one of the mounting seats (3) via a fixing column. Movable rods (8) are symmetrically spaced at the bottom of the fixing plate (10). Movable plates (4) are fitted on the two movable rods (8). The top of the movable plates (4) is symmetrically arranged with... A return spring (7) is sleeved on the movable rod (8). The end of the return spring (7) away from the movable plate (4) is connected to the fixed plate (10). A heat transfer cavity (18) is provided on the inner wall of the positioning seat (15) away from the mounting seat (3). A connecting pipe (16) connected to the preheating pipe (2) is provided on the side of the heat transfer cavity (18) close to the mounting seat (3). An air inlet heat transfer pipe (22) connected to the heat transfer cavity (18) is provided on the top of the side of the positioning seat (15) away from the mounting seat (3). The movable plate (4) is symmetrically provided with support rods (9) on both sides perpendicular to the fixed plate (10). The bottom two ends of the movable plate (4) are symmetrically fixedly installed with first positioning rods (11). The fixed plate (10) is fixedly connected with a fixing connecting rod (23) on the outer wall of one side perpendicular to the mounting base (3). The fixed connecting rod (23) is fixedly installed with a placement plate (6) at the end away from the fixed plate (10). The top of the placement plate (6) is provided with a first electric telescopic rod (5). The output end of the first electric telescopic rod (5) is provided with a first connecting plate (12). 2) A second electric telescopic rod (24) is provided on the outer wall away from the mounting base (3). A mounting plate is provided on the output end of the second electric telescopic rod (24). A plurality of second positioning rods (13) are provided at equal intervals on the side of the mounting plate close to the mounting base (3). The top of the positioning base (15) is symmetrically provided with first positioning holes (14) that cooperate with the first positioning rod (11). A plurality of second positioning holes (17) are provided at intervals in the middle of the side of the positioning base (15) perpendicular to the mounting base (3), and the second positioning holes (17) cooperate with the second positioning rods (13).

2. The anti-clogging device for boiler air preheaters according to claim 1, characterized in that, A positioning block (34) is fixedly connected inside the air intake heat transfer pipe (22). A rotating shaft (19) is rotatably connected to the side of the positioning block (34) near the positioning seat (15). A second connecting plate (21) is symmetrically fixedly connected to the outside of the rotating shaft (19). A first limiting block (20) is provided inside the second connecting plate (21). A scraper (27) is fixedly connected to the outside of the first limiting block (20). A filter screen (29) and a reciprocating screw (32) are respectively provided on the inner wall of the side of the air intake heat transfer pipe (22) near the positioning seat (15) along the direction away from the heat transfer cavity (18). A movable block (31) is threadedly connected to the outside of the reciprocating screw (32). A cleaning frame (30) is fixedly connected to the outside of the movable block (31).

3. The anti-clogging device for boiler air preheaters according to claim 2, characterized in that, A rotary motor (28) is provided on the outer wall of the bottom of the air intake heat transfer pipe (22) near the positioning seat (15). The output end of the rotary motor (28) is fixedly connected to a transmission worm (26) located inside the air intake heat transfer pipe (22). A transmission worm wheel (25) is fixedly connected to the outer side of the rotating shaft (19), and the transmission worm wheel (25) is meshed with the transmission worm (26).

4. The anti-clogging device for boiler air preheaters according to claim 3, characterized in that, The reciprocating lead screw (32) and the transmission worm (26) are connected by belt drive. The air intake heat transfer pipe (22) is fixedly connected to a third positioning rod (33), and the third positioning rod (33) is slidably connected to the movable block (31).

5. The anti-clogging device for a boiler air preheater according to claim 4, characterized in that, The cleaning frame (30) is symmetrically slidably connected to a third limiting block (42), and a cleaning rod (43) is fixedly connected to the outside of the third limiting block (42). A second telescopic spring (41) is provided inside the cleaning frame (30) and outside the third limiting block (42).

6. The anti-clogging device for a boiler air preheater according to claim 5, characterized in that, The second connecting plate (21) is slidably connected to a locking block (38), and the second connecting plate (21) is slidably connected to a push rod (36). One end of the push rod (36) is fixedly connected to a sliding block (35). The locking block (38) is provided with a sliding groove (37) that cooperates with the sliding block (35). The locking block (38) is fixedly connected to a second limiting block (39) on the outside. The second connecting plate (21) is provided with a first telescopic spring (40) inside and outside the second limiting block (39).

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