On-line flushing device for boiler tube type air pre-heater

Abstract

The invention discloses a boiler tube type air pre-heater on-line flushing device, and belongs to the technical field of air pre-heater flushing, the boiler tube type air pre-heater on-line flushing device comprises a box body, the inner wall of the box body is fixedly connected with an air pre-heater body, one side of the box body is provided with an opening and closing mechanism, one side of the box body is fixedly connected with a cover body, and the top of the cover body is fixedly connected with a pair of servo motors. The device is provided with the servo motors, the reciprocating screws, the lifting blocks and the reciprocating mechanisms, the output ends of the pair of servo motors drive the corresponding reciprocating screws to rotate synchronously, so that the lifting blocks ascend and descend along the corresponding reciprocating screws in a reciprocating mode, the connecting frame, the rotating blocks and the moving plate ascend and descend along with the lifting blocks in a reciprocating mode, and meanwhile the reciprocating mechanisms drive the moving plate to do horizontal reciprocating motion; the movable pipe moves together with the movable plate, accumulated dust in the vertical direction of the pipe bundle can be covered, the transverse coverage range of flushing can be enlarged, flushing blind areas are avoided, and the online flushing effect is greatly improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air preheater flushing, and particularly relates to an online flushing device for a boiler tubular air preheater. BACKGROUND

[0002] The boiler tubular air preheater is an important component of a power station boiler and the like, and is mainly used for recycling waste heat of flue gas and heating air required for combustion. The vertical air preheater is a common arrangement form of the tubular air preheater, the tube bundle of which is installed vertically to the ground, flue gas flows through the tube from top to bottom, air flows transversely outside the tube, and the two are in counter-flow or cross-flow heat exchange, which can effectively reduce the flue gas temperature and improve the thermal efficiency of the boiler, and is widely applied to various coal-fired and gas-fired boiler systems.

[0003] The existing boiler tubular air preheater still has the following disadvantages: the existing boiler tubular air preheater lacks efficient online flushing measures, and in long-term operation, dust, fly ash and other particles in the air gradually deposit on the outside of the tubular air preheater, forming an ash layer, which reduces the heat exchange efficiency between air and flue gas, and the existing part of the boiler tubular air preheater usually uses sound waves or pulse air flow to clean the ash, which is difficult to clean the dust in the tube bundle gap. SUMMARY

[0004] In order to overcome the above defects, the application provides an online flushing device for a boiler tubular air preheater, which solves the problem that the existing boiler tubular air preheater lacks efficient online flushing measures.

[0005] To achieve the above purpose, the application provides the following technical scheme: an online flushing device for a boiler tubular air preheater, comprising a box body, an air preheater body is fixedly connected to the inner wall of the box body, an opening and closing mechanism is arranged on one side of the box body, a cover body is fixedly connected to one side of the box body, a pair of servo motors are fixedly connected to the top of the cover body, the output ends of each servo motor penetrate through the cover body and are rotationally connected thereto, a reciprocating screw is fixedly connected to the output end of each servo motor, a lifting block is threadedly connected to the reciprocating screw, a connecting frame is rotationally connected to one side of each lifting block which is close to each other, a reciprocating mechanism is arranged on the connecting frame, a rotating block is fixedly connected between the connecting frames, a plurality of fixed pipes are fixedly connected to the rotating block, a rotating mechanism is arranged on one side of the rotating block, a moving plate is arranged on the other side of the rotating block, a plurality of moving pipes are fixedly connected to the moving plate, each moving pipe is connected with a corresponding fixed pipe through a metal bellows, and a plurality of pairs of nozzles are communicatively arranged on each moving pipe. The opening and closing mechanism comprises a plurality of pairs of limiting blocks, each pair of limiting blocks is fixedly connected to one side of the box body, a limiting sliding groove is formed in each limiting block, a gear rack is arranged between each pair of limiting blocks, one side of the gear rack is fixedly connected with a connecting block one, one side of the connecting block one is fixedly connected with a pressing rod, a hydraulic cylinder is fixedly connected to the side wall of the cover body, the output end of the hydraulic cylinder is fixedly connected with the gear rack, a plurality of opening and closing assemblies are arranged on one side of the box body; The reciprocating mechanism comprises a gear one and a toothed plate, the gear one is rotationally connected to the connecting frame, the toothed plate is arranged on one side of the connecting frame, one side of the toothed plate is fixedly connected with the cover body, the gear one and the toothed plate are meshed with each other, one side of the gear one away from the shaft center is rotationally connected with a connecting rod one, one end of the connecting rod one is rotationally connected with the moving plate. The rotating mechanism comprises a support, the support is arranged on one side of the rotating block, the support is fixedly connected with corresponding lifting blocks at both ends, the support is fixedly connected with a supporting rod at the top, one pair of connecting blocks two is fixedly connected on one side of the supporting rod, a rotating seat is rotationally connected between the connecting blocks two, a plurality of multi-stage electric telescopic rods are fixedly connected to the rotating seat, one pair of connecting blocks three is fixedly connected to the other side of the rotating block, a rotating column is rotationally connected between the connecting blocks three, the output end of the multi-stage electric telescopic rod is fixedly connected with the rotating column.

[0006] As a further scheme of the present application: the opening and closing assembly comprises a baffle, the baffle is arranged on one side of the box body, one pair of connecting rods two is rotationally connected to the top and the bottom of the baffle, one end of each connecting rod two is rotationally connected with a connecting block four, one side of each connecting block four is fixedly connected with the box body, the top of one of the connecting blocks four is provided with a gear two, the gear two is meshed with the gear rack, the gear two is coaxially fixedly connected with a rotating shaft at the bottom, the rotating shaft penetrates through the corresponding connecting block four and is rotationally connected therewith at the bottom, and the rotating shaft is coaxially fixedly connected with the corresponding connecting rod two at the bottom.

[0007] As a further scheme of the present application: a plurality of through openings are formed in one side of the box body.

[0008] As a further scheme of the present application: a plurality of connecting pipes are fixedly connected to the cover body, and each connecting pipe is connected with the corresponding fixed pipe through a hose.

[0009] As a further scheme of the present application: a pressure switch is fixedly connected to the side wall of the cover body, a control box is fixedly connected to one side of the cover body, a control module is arranged in the control box, the pressure switch is signal connected with the control module, and the control module is electrically connected with the multi-stage electric telescopic rod.

[0010] As a further scheme of the present application: a through sliding groove is formed in the toothed plate, and the through sliding groove is matched with the support.

[0011] As a further scheme of the present application: the reciprocating screw bottom is rotationally connected with the cover body.

[0012] As a further scheme of the present application: the rotating block bottom is fixedly connected with a plurality of connecting blocks five, each of which is slidingly connected with a guide rod, and one end of each of the guide rods is fixedly connected with the moving plate.

[0013] Compared with the prior art, the present application has the following advantages: 1. The present application is provided with an opening and closing mechanism, a plurality of through openings are formed on one side of the box body, and when the air preheater body in the box body is normally working, the baffle in the opening and closing mechanism can block the through openings on one side of the box body, and a sealing ring can be arranged on one side of the baffle to ensure the air tightness of the box body and reduce heat loss. When flushing, the baffle in the opening and closing mechanism is rotated to open and expose the through openings, providing an access channel for the moving pipe. 2. The present application is provided with a pressing rod, a pressure switch, a control box, a rotating mechanism, a connecting frame, a rotating block and a moving plate. The pressing rod moves together with the rack in the opening and closing mechanism, and when the pressing rod triggers the pressure switch, the control module in the control box starts the rotating mechanism, which drives the rotating block to rotate between a pair of lifting blocks through the connecting frames on both sides of the rotating block, so that the moving plate drives the moving pipe to pass through the corresponding through openings on one side of the box body and rotate into the pipe bundle gap in the air preheater body, realizing the space transformation of the moving pipe. When not flushing, the moving pipe is stored in the cover body, reducing the space occupation. When flushing, the moving pipe quickly responds and accurately intervenes in the work area, significantly improving the flushing efficiency. 3. The present application is provided with a servo motor, a reciprocating screw, a lifting block and a reciprocating mechanism. The output ends of a pair of servo motors drive the corresponding reciprocating screws to rotate synchronously, so that the lifting blocks reciprocate along the corresponding reciprocating screws, and the connecting frame, the rotating block and the moving plate reciprocate together with the lifting blocks. At the same time, the reciprocating mechanism drives the moving plate to move horizontally, and the moving pipe moves together with the moving plate. Not only can it cover the dust accumulation in the vertical direction of the pipe bundle, but also can expand the flushing transverse coverage range, avoiding the flushing blind area, and greatly improving the effect of online flushing. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall schematic diagram of the present application; Figure 2 It is the box body section and cover body section schematic diagram of the present application; Figure 3 It is the box body and cover body section schematic diagram of the present application; Figure 4 It is the Figure 3 It is the enlarged schematic diagram of A in the present application; Figure 5 It is the Figure 3 It is the enlarged schematic diagram of B in the present application; Figure 6 The schematic diagram of the limiting block and the rack of the present application; Figure 7 The schematic diagram of the baffle section of the present application; Figure 8 The schematic diagram of the internal structure of the cover of the present application; Figure 9 The schematic diagram of the rack section of the present application Figure 1 ; Figure 10 The schematic diagram of the rack section of the present application Figure 2 ; Figure 11 The schematic diagram of the rotating block and the moving plate of the present application; Figure 12 The schematic diagram of the support rod and the multi-stage electric telescopic rod of the present application.

[0015] In the figure: 1, the box body; 2, the air preheater body; 3, the cover; 4, the servo motor; 5, the reciprocating screw; 6, the lifting block; 7, the connecting frame; 8, the rotating block; 9, the fixed pipe; 10, the moving plate; 11, the moving pipe; 12, the nozzle; 13, the limiting block; 14, the rack; 15, the connecting block one; 16, the pressing rod; 17, the hydraulic cylinder; 18, the gear one; 19, the rack plate; 20, the connecting rod one; 21, the support; 22, the support rod; 23, the connecting block two; 24, the rotating seat; 25, the multi-stage electric telescopic rod; 26, the connecting block three; 27, the rotating column; 28, the baffle; 29, the connecting rod two; 30, the connecting block four; 31, the gear two; 32, the connecting pipe; 33, the pressure switch; 34, the control box; 35, the connecting block five; 36, the guide rod. DETAILED DESCRIPTION

[0016] The technical solution of the present patent will be further described in detail in combination with the specific embodiments.

[0017] As shown in the figure, the present application provides a technical solution: Figures 1-12 ​The utility model provides a kind of boiler tubular air preheater online flushing device, including box 1, air preheater body 2 is fixedly connected on the inner wall of box 1, opening and closing mechanism is provided at one side of box 1, cover 3 is fixedly connected at one side of box 1, a pair of servo motors 4 is fixedly connected at the top of cover 3, each servo motor 4 output end is all through cover 3 and is rotationally connected, each servo motor 4 output end is coaxially fixedly connected with reciprocating screw 5, lifting block 6 is threadedly connected on reciprocating screw 5, a pair of lifting block 6 mutually close side is rotationally connected with connecting frame 7, and reciprocating mechanism is provided on connecting frame 7, rotating block 8 is fixedly connected between a pair of connecting frame 7, and a plurality of fixed pipes 9 are fixedly connected on rotating block 8, rotating mechanism is provided at one side of rotating block 8, moving plate 10 is provided at the other side of rotating block 8, and a plurality of moving pipes 11 are fixedly connected on moving plate 10, and each moving pipe 11 is connected by metal bellows with corresponding fixed pipe 9, and each moving pipe 11 is all communicated with multiple pairs of spray head 12, and reciprocating screw 5 bottom is rotationally connected with cover 3, and a plurality of connecting pipes 32 are fixedly connected on cover 3, and each connecting pipe 32 is connected between corresponding fixed pipe 9 by hose, and a plurality of through openings are provided at one side of box 1, connecting pipe 32 is connected with high-pressure steam conveying pipeline, and hose adopts three-layer composite design of "inner rubber layer+reinforcing layer+outer rubber layer", and the material of inner rubber layer is high-temperature-resistant rubber, and reinforcing layer is knitted by high-strength fiber, to improve comprehensive pressure-bearing capacity, and the material of outer rubber layer is weather-resistant rubber, to prevent aging and cracking, and also provide wear-resistant protection, when it is needed to flush the tube bundle in air preheater body 2, opening and closing mechanism is opened, exposes a plurality of through openings at one side of box 1, rotating mechanism drives rotating block 8 to rotate a certain angle, rotating block 8 drives the connecting frame 7 on its two sides to rotate between a pair of lifting block 6, moving plate 10 rotates with rotating block 8, so that the moving pipe 11 on moving plate 10 can pass through the corresponding through opening at one side of box 1, moving pipe 11 is rotated into the gap between the tube bundle in air preheater body 2, a pair of servo motors 4 is started, and the output end of a pair of servo motors 4 drives corresponding reciprocating screw 5 to rotate synchronously, so that lifting block 6 reciprocatingly rises and falls along corresponding reciprocating screw 5, so that connecting frame 7, rotating block 8 and moving plate 10 reciprocatingly rise and fall with lifting block 6, while reciprocating mechanism drives moving plate 10 to reciprocate horizontally, moving pipe 11 moves with moving plate 10, high-pressure steam passes through connecting pipe 32, hose, fixed pipe 9, metal bellows and moving pipe 11 in turn, and finally is sprayed out through spray head 12, to deeply flush the tube bundle in air preheater body 2, and the dust on the tube bundle is raised and enters the combustion part of boiler with air; The opening and closing mechanism comprises a plurality of pairs of limiting blocks 13, each pair of limiting blocks 13 is fixedly connected to one side of the box body 1, each limiting block 13 is provided with a limiting sliding groove, each pair of limiting blocks 13 is provided with a gear rack 14, one side of the gear rack 14 is fixedly connected with a connecting block one 15, one side of the connecting block one 15 is fixedly connected with a pressing rod 16, the side wall of the cover body 3 is fixedly connected with a hydraulic cylinder 17, the output end of the hydraulic cylinder 17 is fixedly connected with the gear rack 14, one side of the box body 1 is provided with a plurality of opening and closing assemblies, the hydraulic cylinder 17 is started, the output end of the hydraulic cylinder 17 drives the gear rack 14, the gear rack 14 can slide along the limiting sliding groove of each pair of limiting blocks 13, the gear rack 14 drives the opening and closing assembly to open, the pressing rod 16 moves together with the gear rack 14 through the connecting block one 15; The reciprocating mechanism comprises a gear one 18 and a toothed plate 19, the gear one 18 is rotatably connected to the connecting frame 7, the toothed plate 19 is arranged on one side of the connecting frame 7, one side of the toothed plate 19 is fixedly connected with the cover body 3, the gear one 18 is meshed with the toothed plate 19, one side of the gear one 18 away from the shaft center is rotatably connected with a connecting rod one 20, one end of the connecting rod one 20 is rotatably connected with the moving plate 10, the gear one 18 rises and falls together with the connecting frame 7, so that the relative displacement between the gear one 18 and the toothed plate 19 occurs, the gear one 18 rotates on the connecting frame 7, and the gear one 18 reciprocatingly pushes and pulls the moving plate 10 through the connecting rod one 20; The rotating mechanism comprises a support 21, the support 21 is arranged on one side of the rotating block 8, both ends of the support 21 are fixedly connected with the corresponding lifting block 6, the support 21 is fixedly connected with a supporting rod 22 at the top, one side of the supporting rod 22 is fixedly connected with a pair of connecting blocks two 23, a rotating seat 24 is rotatably connected between the pair of connecting blocks two 23, a plurality of multi-stage electric telescopic rods 25 are fixedly connected on the rotating seat 24, one side of the rotating block 8 is fixedly connected with a pair of connecting blocks three 26, a rotating column 27 is rotatably connected between the pair of connecting blocks three 26, the output end of the plurality of multi-stage electric telescopic rods 25 is fixedly connected with the rotating column 27, the plurality of multi-stage electric telescopic rods 25 is started, the output end of the plurality of multi-stage electric telescopic rods 25 drives the connecting blocks three 26 through the rotating column 27, the connecting blocks three 26 drive the rotating block 8 to rotate, a groove capable of accommodating the plurality of multi-stage electric telescopic rods 25 is arranged on the rotating block 8, so that the plurality of multi-stage electric telescopic rods 25 and the rotating block 8 are prevented from interfering with each other; The opening and closing assembly comprises a baffle 28 arranged on one side of the box body 1, a pair of connecting rods two 29 rotatably connected to the top and bottom of the baffle 28, one end of each connecting rod two 29 rotatably connected with a connecting block four 30, one side of each connecting block four 30 fixedly connected with the box body 1, the top of one of the connecting block four 30 is provided with a gear two 31, the gear two 31 is engaged with the rack 14, the gear two 31 is coaxially fixedly connected with a rotating shaft at the bottom, the rotating shaft penetrates through the corresponding connecting block four 30 and is rotatably connected with the same, the rotating shaft is coaxially fixedly connected with the corresponding connecting rod two 29 at the bottom, the rack 14 drives the gear two 31 engaged with the same to rotate, the gear two 31 drives the corresponding connecting rod two 29 to rotate through the rotating shaft, so that the baffle 28 starts to rotate parallel to one side of the box body 1, and the through opening blocked by the baffle 28 is exposed; The side wall of the cover body 3 is fixedly connected with a pressure switch 33, one side of the cover body 3 is fixedly connected with a control box 34, the control box 34 is provided with a control module, the pressure switch 33 is signal connected with the control module, and the control module is electrically connected with the multi-stage electric telescopic rod 25; when the pressing rod 16 triggers the pressure switch 33, the dislocation space between the baffle 28 and the through opening is sufficient for the moving pipe 11 to pass through, the control module in the control box 34 receives the signal of the pressure switch 33, the control module starts the multi-stage electric telescopic rod 25, and the output end of the multi-stage electric telescopic rod 25 is stopped after extending for a distance; when the pressing rod 16 releases the pressure switch 33, the dislocation space between the baffle 28 and the through opening is also sufficient for the moving pipe 11 to pass through, the control module restarts the multi-stage electric telescopic rod 25, so that the output end of the multi-stage electric telescopic rod 25 is retracted to the initial position; The tooth plate 19 is provided with a through sliding groove, the through sliding groove is matched with the support 21, the support 21 moves together with the lifting block 6, and the support 21 slides along the through sliding groove on the tooth plate 19; The bottom of the rotating block 8 is fixedly connected with a plurality of connecting blocks five 35, each connecting block five 35 is slidably connected with a guide rod 36, and one end of each guide rod 36 is fixedly connected with the moving plate 10.

[0018] The working principle of the application is as follows: When the tube bundle in the air preheater body 2 needs to be flushed, the hydraulic cylinder 17 is started, the output end of the hydraulic cylinder 17 pulls the rack 14, the rack 14 can slide along the limiting sliding groove on each pair of limiting blocks 13, the rack 14 drives the gear two 31 engaged with it to rotate, the gear two 31 drives the corresponding connecting rod two 29 to rotate through the rotating shaft, so that the baffle 28 starts to rotate parallel to one side of the box body 1, the through opening blocked by the baffle 28 is exposed, and the pressing rod 16 moves together with the rack 14 through the connecting block one 15, when the pressing rod 16 triggers the pressure switch 33, the misalignment space between the baffle 28 and the through opening is sufficient for the tube 11 to pass through, the control module in the control box 34 receives the signal of the pressure switch 33, and the control module starts the multi-stage electric telescopic rod 25, so that the output end of the multi-stage electric telescopic rod 25 extends for a distance and then stops; The output end of the multi-stage electric telescopic rod 25 pushes the connecting block three 26 through the rotating column 27, the connecting block three 26 drives the rotating block 8 to rotate, the rotating block 8 rotates by a certain angle, the rotating block 8 drives the connecting frames 7 on its two sides to rotate between a pair of lifting blocks 6, and the moving plate 10 rotates together with the rotating block 8, so that the moving tube 11 on the moving plate 10 can pass through the corresponding through opening on one side of the box body 1, and the moving tube 11 rotates into the gap between the tube bundle in the air preheater body 2; A pair of servo motors 4 are started, the output ends of the pair of servo motors 4 drive the corresponding reciprocating screws 5 to rotate synchronously, so that the lifting blocks 6 reciprocate along the corresponding reciprocating screws 5, so that the connecting frames 7, the rotating block 8 and the moving plate 10 reciprocate together with the lifting blocks 6, at the same time, the gear one 18 reciprocates together with the connecting frames 7, so that the relative displacement between the gear one 18 and the toothed plate 19 occurs, the gear one 18 rotates on the connecting frames 7, the gear one 18 reciprocatingly pushes and pulls the moving plate 10 through the connecting rod one 20, the moving plate 10 drives the guide rod 36 to reciprocate on the corresponding connecting block five 35, the moving plate 10 moves horizontally and reciprocally, the moving tube 11 moves together with the moving plate 10, the high-pressure steam passes through the connecting pipe 32, the hose, the fixed tube 9, the metal bellows and the moving tube 11 in turn, and is finally sprayed out through the nozzle 12, so that the tube bundle in the air preheater body 2 is deeply flushed, and the accumulated dust on the tube bundle is lifted and enters the boiler combustion part with the air.

[0019] The above describes the preferred embodiment of the patent in detail, but the patent is not limited to the above embodiment, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the patent.

Claims

1. A boiler tubular air preheater on-line washing device comprising a box (1), characterized in that: The box (1) inner wall is fixedly connected with the air preheater body (2), one side of the box (1) is provided with an opening and closing mechanism, one side of the box (1) is fixedly connected with a cover body (3), the top of the cover body (3) is fixedly connected with a pair of servo motors (4), the output end of each servo motor (4) penetrates through the cover body (3) and is rotationally connected therewith, the output end of each servo motor (4) is coaxially fixedly connected with a reciprocating screw (5), the reciprocating screw (5) is threadedly connected with a lifting block (6), a pair of lifting blocks (6) are rotationally connected with a connecting frame (7) on the side close to each other, the connecting frame (7) is provided with a reciprocating mechanism, a rotating block (8) is fixedly connected between a pair of connecting frames (7), a plurality of fixed pipes (9) are fixedly connected to the rotating block (8), a rotating mechanism is arranged on one side of the rotating block (8), a moving plate (10) is arranged on the other side of the rotating block (8), a plurality of moving pipes (11) are fixedly connected to the moving plate (10), each moving pipe (11) is connected through a metal bellows with a corresponding fixed pipe (9), and a plurality of pairs of nozzles (12) are communicatively arranged on each moving pipe (11); The opening and closing mechanism comprises a plurality of pairs of limiting blocks (13), each pair of limiting blocks (13) is fixedly connected to one side of the box (1), each limiting block (13) is provided with a limiting sliding groove, a gear rack (14) is arranged between each pair of limiting blocks (13), one side of the gear rack (14) is fixedly connected with a connecting block one (15), one side of the connecting block one (15) is fixedly connected with a pressing rod (16), a hydraulic cylinder (17) is fixedly connected to the side wall of the cover body (3), the output end of the hydraulic cylinder (17) is fixedly connected with the gear rack (14), and a plurality of opening and closing assemblies are arranged on one side of the box (1); The reciprocating mechanism comprises a gear one (18) and a toothed plate (19), the gear one (18) is rotationally connected to the connecting frame (7), the toothed plate (19) is arranged on one side of the connecting frame (7), one side of the toothed plate (19) is fixedly connected with the cover body (3), the gear one (18) is in meshing engagement with the toothed plate (19), and one side of the gear one (18) away from the shaft center is rotationally connected with a connecting rod one (20), one end of the connecting rod one (20) is rotationally connected with the moving plate (10); The rotating mechanism comprises a support (21), the support (21) is arranged on one side of the rotating block (8), the support (21) is fixedly connected with the corresponding lifting block (6) at both ends, the support (21) is fixedly connected with a supporting rod (22) at the top, one side of the supporting rod (22) is fixedly connected with a pair of connecting blocks two (23), a rotating seat (24) is rotationally connected between a pair of connecting blocks two (23), a plurality of multi-stage electric telescopic rods (25) are fixedly connected to the rotating seat (24), one side of the rotating block (8) is fixedly connected with a pair of connecting blocks three (26), a rotating column (27) is rotationally connected between a pair of connecting blocks three (26), and the output end of the multi-stage electric telescopic rod (25) is fixedly connected with the rotating column (27).

2. The on-line cleaning device for a boiler tubular air preheater according to claim 1, characterized in that: The opening and closing assembly comprises a baffle (28) arranged on one side of the box (1), a pair of connecting rods two (29) rotatably connected to the top and bottom of the baffle (28), one end of each of the connecting rods two (29) rotatably connected with a connecting block four (30), one side of each of the connecting block four (30) fixedly connected with the box (1), wherein one of the connecting block four (30) is provided with a gear two (31) at the top, the gear two (31) is engaged with the rack (14), the gear two (31) is coaxially fixedly connected with a rotating shaft at the bottom, the rotating shaft penetrates through the corresponding connecting block four (30) and is rotatably connected therewith at the bottom, and the rotating shaft is coaxially fixedly connected with the corresponding connecting rod two (29) at the bottom.

3. A boiler tube type air preheater on-line washing device according to claim 2, characterized in that: A plurality of through openings are formed in one side of the box (1).

4. The on-line cleaning device for a boiler tubular air preheater according to claim 3, characterized in that: A plurality of connecting pipes (32) are fixedly connected to the cover body (3), and each connecting pipe (32) is connected with the corresponding fixed pipe (9) through a hose.

5. A boiler tube type air preheater on-line washing device according to claim 4, characterized in that: A pressure switch (33) is fixedly connected to the side wall of the cover body (3), a control box (34) is fixedly connected to one side of the cover body (3), a control module is arranged in the control box (34), the pressure switch (33) is signal connected with the control module, and the control module is electrically connected with the multi-stage electric telescopic rod (25).

6. A boiler tube type air preheater on-line washing device according to claim 5, characterized in that: A through sliding groove is formed in the toothed plate (19), and the through sliding groove is matched with the support (21).

7. A boiler tube type air preheater on-line washing device according to claim 6, characterized in that: The reciprocating screw rod (5) is rotatably connected with the cover body (3) at the bottom.

8. A boiler tube type air preheater on-line washing device according to claim 7, characterized in that: A plurality of connecting blocks five (35) are fixedly connected to the bottom of the rotating block (8), a guide rod (36) is slidably connected to each connecting block five (35), and one end of each guide rod (36) is fixedly connected with the moving plate (10).

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