Soot blowing device

Abstract

The utility model belongs to the technical field of soot blowers, and particularly relates to a soot blowing device which comprises a frame body and a soot blowing pipe, the soot blowing pipe comprises an inner pipe and an outer pipe, the inner pipe is connected with the outer pipe in a sliding mode, the outer pipe is fixedly connected with the frame body, and one end of the inner pipe can penetrate through the front end of the frame body to stretch out and is fixedly connected with a spray head. A sliding frame is rotationally connected to the inner pipe and connected with the frame body in a sliding mode. And a linear driving mechanism is arranged on the frame body and comprises a fixed screw sleeve and a movable screw rod. And the movable screw rod is moved through rotation of the fixed screw sleeve, so that the corresponding inner pipe is driven to move forwards and extend into the boiler. In the structural arrangement, movement of the inner pipe is achieved in the mode that the movable screw moves, the length of the movable screw is shortened, only when ash needs to be removed, the end of the movable screw can be close to the boiler, and the possibility of deformation is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of soot blowers, and particularly relates to a soot blowing device. Background Art

[0002] A sootblower is a device used to remove soot accumulated on the heating surfaces of a boiler, primarily to ensure proper operation and improve thermal efficiency. Sootblower operating principles and types vary, with common ones including sonic sootblower, shock wave sootblower, rake sootblower, fixed rotary sootblower, and telescopic sootblower.

[0003] Existing telescopic sootblowers can move forward and backward while rotating, forming a spiral trajectory. However, the spiral trajectories formed during this movement overlap, resulting in some areas not being cleaned properly. Furthermore, the associated motor also moves with it, necessitating a corresponding drag chain structure.

[0004] Patent application number 202210286843.7 discloses a threaded air sootblower. Its threaded sootblower rod is connected to a moving device for driving the sootblower outer tube to rotate and move. Two lower connecting frames 100 are equipped with multiple brushing devices for brushing the outer wall of the sootblower outer tube, thereby cleaning the outer wall of the pipe. It uses a linear motion mechanism similar to a ball screw to ensure that the motor remains in a fixed state during movement, eliminating the need for a drag chain structure.

[0005] However, it uses a full-length lead screw, and the front end of the lead screw is close to the boiler, which is easily affected by the temperature, resulting in uneven heating of the entire lead screw. Furthermore, its long length can easily cause the lead screw to deform over time. Furthermore, it also fails to solve the problem of overlapping spiral trajectory lines when moving forward and backward. Utility Model Content

[0006] In response to the above technical problems, the utility model provides a sootblowing device, which adopts a screw-moving structural setting, and its long and short ends are close to the boiler only when cleaning; at the same time, the device sets different transmission ratios so that the spiral trajectories formed by the forward and backward movements are different.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A sootblowing device comprises a frame and a sootblowing pipe, the sootblowing pipe comprising an inner pipe and an outer pipe, the inner pipe being slidably connected to the outer pipe, the outer pipe being fixedly connected to the frame, one end of the inner pipe being able to extend through the front end of the frame and fixedly connected to a nozzle; a slide being rotatably connected to the inner pipe, the slide being slidably connected to the frame;

[0009] The frame is provided with a linear drive mechanism, which includes a fixed screw sleeve and a movable screw; a connecting frame is slidably connected to the frame, and the two ends of the movable screw are fixedly connected to the slide and the connecting frame respectively; the fixed screw sleeve is threadedly connected to the movable screw, and a driving motor is fixed on the frame, which drives the fixed screw sleeve to rotate;

[0010] A worm gear is fixedly connected to the inner tube, and a worm engaged with the worm gear is rotatably connected to the slide; a first rack and a second rack are fixedly connected to the frame body, and the two ends of the worm are respectively connected to a first gear and a second gear through a one-way bearing; when the slide moves forward, the first rack is engaged with the first gear to drive the worm to rotate, and when the slide moves forward, the second rack is engaged with the second gear to drive the worm to rotate; the transmission ratio between the first gear and the first rack is different from the transmission ratio between the second gear and the first rack.

[0011] The output shaft of the driving motor is fixedly connected with a driving gear, and the fixed nut is fixedly connected with a transmission gear meshing with the driving gear.

[0012] A cleaning box is fixedly connected to the front end of the frame, and a suction pipe is connected to the cleaning box. The inner tube passes through the cleaning box and the front end of the frame in sequence and extends out; a cleaning component is provided in the cleaning box, and the outer surface of the inner tube is cleaned by the cleaning component.

[0013] The cleaning assembly includes a cleaning ring and a knocking assembly. The cleaning ring is fixedly connected to the cleaning box through a spring. The cleaning ring is sleeved on the outside of the inner tube. A circle of bristles in contact with the outer wall of the inner tube is fixed inside the cleaning ring. A circle of through holes is provided on the cleaning ring. The knocking assembly is driven by the rotation of the inner tube to intermittently knock on the outer wall of the cleaning ring.

[0014] The knocking assembly includes a support frame and a knocking rod, the knocking rod is slidably connected to the support frame, a push spring is provided between the knocking rod and the support frame, a rotatable cylindrical cam is connected to the support frame, the cylindrical cam contacts the outer surface of the inner tube, and the cylindrical cam is driven to rotate through the inner tube; a connecting rod that cooperates with the cylindrical cam is fixedly connected to the knocking rod.

[0015] A connecting arm is hinged on the support frame, a torsion spring is provided at the hinge between the support frame and the connecting arm, and the cylindrical cam is rotatably connected to the connecting arm.

[0016] A knocking plate in contact with the knocking rod is fixedly connected to the cleaning ring.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The fixed sleeve rotates to move the movable screw, which in turn drives the corresponding inner tube forward and into the boiler. This structural arrangement uses the movable screw to move the inner tube, shortening the length of the movable screw. The end of the movable screw only approaches the boiler when dust removal is required, reducing the possibility of deformation.

[0019] The transmission ratio between the first gear and the first rack is different from the transmission ratio between the second gear and the first rack; and they are respectively connected by a one-way bearing, so that during the forward and backward movement, the engagement of gears and racks with different gear ratios drives the worm to rotate, thereby changing the rotation speed of the inner tube, thereby changing the different spiral trajectories formed during the forward and backward movement, and improving the cleaning effect and coverage range.

[0020] A cleaning ring is provided to clean the outer surface of the inner tube; and a knocking assembly is provided to clean the cleaning ring by knocking the assembly to avoid dust accumulation on the cleaning ring itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of one direction of the utility model;

[0022] Figure 2 It is a structural diagram of another direction of the utility model;

[0023] Figure 3 This is a structural diagram of another direction of the utility model;

[0024] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle;

[0025] Figure 5 It is the main view of the utility model;

[0026] Figure 6 This is a schematic diagram of the internal structure of the cleaning box of the utility model;

[0027] Figure 7 It is a structural diagram of the striking component of the utility model;

[0028] Figure 8 This is a schematic structural diagram of the cylindrical cam of the utility model;

[0029] Among them: 1 is a frame, 100 is a connecting frame, 2 is a soot blowing pipe, 3 is an inner pipe, 4 is an outer pipe, 5 is a nozzle, 6 is a slide, 7 is a fixed screw sleeve, 8 is a movable screw, 9 is a drive motor, 10 is a worm gear, 11 is a worm, 12 is a first rack, 13 is a second rack, 14 is a one-way bearing, 15 is a first gear, 16 is a second gear, 17 is a drive gear, 18 is a transmission gear, 19 is a cleaning box, 20 is an exhaust pipe, 21 is a cleaning ring, 22 is a knocking assembly, 23 is a spring, 24 is a brush, 25 is a through hole, 26 is a support frame, 27 is a knocking rod, 28 is a push spring, 29 is a cylindrical cam, 30 is a connecting rod, 31 is a connecting arm, 32 is a torsion spring, and 33 is a knocking plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0031] like Figure 1-8 As shown, a sootblowing device includes a frame 1 and a sootblowing pipe 2. The sootblowing pipe 2 includes an inner pipe 3 and an outer pipe 4. The inner pipe 3 is slidably connected to the outer pipe 4, and the outer pipe 4 is fixedly connected to the frame 1. One end of the inner pipe 3 can extend through the front end of the frame 1 and is fixedly connected to a nozzle 5. A slide 6 is rotatably connected to the inner pipe 3 and is slidably connected to the frame 1. The outer pipe 4 is connected to a steam pipeline through a valve assembly.

[0032] A linear drive mechanism is provided on the frame 1, which realizes the forward and backward movement of the inner tube 3. The linear drive mechanism includes a fixed screw sleeve 7 and a movable screw 8; the length of the movable screw 8 accounts for about half of the length of the frame 1, and the overall length is short.

[0033] A connecting frame 100 is slidably connected to the frame body 1, and the two ends of the movable screw 8 are fixedly connected to the slide 6 and the connecting frame 100 respectively; the fixed screw sleeve 7 is threadedly connected to the movable screw 8, and a driving motor 9 is fixed to the frame body 1, which drives the fixed screw sleeve 7 to rotate. When the fixed screw sleeve 7 rotates, the movable screw 8 moves, thereby driving the slide 6 and the connecting frame 100 to move accordingly.

[0034] A worm gear 10 is fixedly connected to the inner tube 3, and a worm 11 meshing with the worm gear 10 is rotatably connected to the slide 6; a first rack 12 and a second rack 13 are fixedly connected to the frame body 1, and both ends of the worm 11 are connected to a first gear 15 and a second gear 16 through a one-way bearing 14 respectively.

[0035] That is, the two one-way bearings rotate in different directions; so when the carriage 6 moves forward, the first rack 12 meshes with the first gear 15 to drive the worm 11 to rotate, and when the carriage 6 moves forward, the second rack 13 meshes with the second gear 16 to drive the worm 11 to rotate. At the same time, the transmission ratio between the first gear 15 and the first rack 12 is different from the transmission ratio between the second gear 16 and the first rack 12.

[0036] The aforementioned rack and pinion mechanism allows the inner tube 3 to rotate during movement, resulting in a spiral trajectory for the nozzle 5 (inner tube 3). Forward and backward movement are driven by meshing racks and pinions with different transmission ratios, resulting in distinct spiral trajectories that do not overlap. This increases the sweeping range and prevents incomplete cleaning.

[0037] Furthermore, a driving gear 17 is fixedly connected to the output shaft of the driving motor 9, and a transmission gear 18 meshing with the driving gear 17 is fixedly connected to the fixed screw sleeve 7; that is, transmission is performed between the driving motor 9 and the fixed screw sleeve 7 by means of gear transmission.

[0038] Furthermore, since the inner tube 3 extends into the interior of the boiler, dust will accumulate on the outer surface of the inner tube 3. Therefore, a cleaning box 19 is fixedly connected to the front end of the frame 1. The cleaning box 19 is connected to an exhaust pipe 20, and the exhaust pipe 20 is connected to an exhaust fan.

[0039] The inner tube 3 extends through the cleaning box 19 and the front end of the frame 1 in sequence; a cleaning component is provided in the cleaning box 19, and the outer surface of the inner tube 3 is cleaned by the cleaning component; the cleaned dust is extracted through the exhaust pipe 20, and specifically can be extracted to the dust removal device by an exhaust fan.

[0040] Furthermore, the cleaning assembly includes a cleaning ring 21 and a knocking assembly 22. The cleaning ring 21 is fixedly connected to the cleaning box 19 via a spring 23. The cleaning ring 21 is sleeved on the outer surface of the inner tube 3. A circle of bristles 24 is fixed inside the cleaning ring 21, which contacts the outer wall of the inner tube 3. The cleaning ring 21 is provided with a circle of through holes 25. The rotation of the inner tube 3 drives the knocking assembly 22 to intermittently knock on the outer wall of the cleaning ring 21. This allows the bristles 24 and the cleaning ring 21 to be knocked off, thus achieving self-cleaning.

[0041] Furthermore, the knocking assembly 22 includes a support frame 26 and a knocking rod 27. The knocking rod 27 is slidably connected to the support frame 26. A push spring 28 is provided between the knocking rod 27 and the support frame 26. A rotatable cylindrical cam 29 is connected to the support frame 26. The cylindrical cam 29 contacts the outer surface of the inner tube 3 and drives the cylindrical cam 29 to rotate through the inner tube 3; a connecting rod 30 that cooperates with the cylindrical cam 29 is fixedly connected to the knocking rod 27.

[0042] As the cylindrical cam 29 rotates, the connecting rod 30 cooperates with the cam surface of the cylindrical cam 29 to push the knocking rod 27 and compress the push spring 28. When the cylindrical cam 29 reaches its highest point, the connecting rod 30 no longer contacts the cam surface of the cylindrical cam 29, and the push spring 28 releases its elastic potential energy to drive the knocking rod 27 to move in the opposite direction, intermittently knocking the cleaning ring 21. The specific cam surface can be configured according to actual needs, and the structure shown in the accompanying drawings can also be used.

[0043] Furthermore, in order to make the cylindrical cam 29 fit the inner tube 3 better, a connecting arm 31 is hinged on the support frame 26, and a torsion spring 32 is provided at the hinge between the support frame 26 and the connecting arm 31, and the cylindrical cam 29 is rotatably connected to the connecting arm 31; the elasticity of the torsion spring 32 is utilized to make the arc cam elastically contact with the inner tube 3.

[0044] Furthermore, a knocking plate 33 in contact with the knocking rod 27 is fixedly connected to the cleaning ring 21 ; that is, the knocking plate 33 causes the cleaning ring 21 to vibrate by striking the knocking plate 33 (cooperating with the spring 23 ).

[0045] Only the preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above embodiments.

Claims

1. A sootblowing device, characterized in that: It comprises a frame (1) and a sootblowing pipe (2), wherein the sootblowing pipe (2) comprises an inner pipe (3) and an outer pipe (4), wherein the inner pipe (3) is slidably connected to the outer pipe (4), and the outer pipe (4) is fixedly connected to the frame (1); one end of the inner pipe (3) can pass through the front end of the frame (1) and extend out and is fixedly connected to a nozzle (5); a slide (6) is rotatably connected to the inner pipe (3), and the slide (6) is slidably connected to the frame (1); The frame (1) is provided with a linear drive mechanism, which includes a fixed screw sleeve (7) and a movable screw rod (8); a connecting frame (100) is slidably connected to the frame (1), and two ends of the movable screw rod (8) are fixedly connected to the slide (6) and the connecting frame (100) respectively; the fixed screw sleeve (7) is threadedly connected to the movable screw rod (8), and a driving motor (9) is fixed to the frame (1), and the fixed screw sleeve (7) is driven to rotate by the driving motor (9); A worm gear (10) is fixedly connected to the inner tube (3), and a worm (11) meshing with the worm gear (10) is rotatably connected to the slide (6); a first rack (12) and a second rack (13) are fixedly connected to the frame body (1), and both ends of the worm gear (11) are connected to a first gear (15) and a second gear (16) via a one-way bearing (14); when the slide (6) moves forward, the first rack (12) meshes with the first gear (15) to drive the worm gear (11) to rotate, and when the slide (6) moves forward, the second rack (13) meshes with the second gear (16) to drive the worm gear (11) to rotate; a transmission ratio between the first gear (15) and the first rack (12) is different from a transmission ratio between the second gear (16) and the first rack (12).

2. A sootblowing device according to claim 1, characterized in that: A driving gear (17) is fixedly connected to the output shaft of the driving motor (9), and a transmission gear (18) meshing with the driving gear (17) is fixedly connected to the fixed screw sleeve (7).

3. A sootblowing device according to claim 1, characterized in that: A cleaning box (19) is fixedly connected to the front end of the frame (1), and a suction pipe (20) is connected to the cleaning box (19). The inner tube (3) passes through the cleaning box (19) and the front end of the frame (1) in sequence and extends out. A cleaning component is provided in the cleaning box (19), and the outer surface of the inner tube (3) is cleaned by the cleaning component.

4. A sootblowing device according to claim 3, characterized in that: The cleaning assembly comprises a cleaning ring (21) and a knocking assembly (22). The cleaning ring (21) is fixedly connected to the cleaning box (19) via a spring (23). The cleaning ring (21) is sleeved outside the inner tube (3). A circle of bristles (24) contacting the outer wall of the inner tube (3) is fixed inside the cleaning ring (21). A circle of through holes (25) is provided on the cleaning ring (21). The knocking assembly (22) is driven by the rotation of the inner tube (3) to intermittently knock on the outer wall of the cleaning ring (21).

5. A sootblowing device according to claim 4, characterized in that: The knocking assembly (22) includes a support frame (26) and a knocking rod (27), wherein the knocking rod (27) is slidably connected to the support frame (26), and a push spring (28) is provided between the knocking rod (27) and the support frame (26). A rotatable cylindrical cam (29) is connected to the support frame (26), and the cylindrical cam (29) contacts the outer surface of the inner tube (3) and drives the cylindrical cam (29) to rotate through the inner tube (3); and a connecting rod (30) that cooperates with the cylindrical cam (29) is fixedly connected to the knocking rod (27).

6. A sootblowing device according to claim 5, characterized in that: A connecting arm (31) is hinged on the support frame (26), a torsion spring (32) is provided at the hinge between the support frame (26) and the connecting arm (31), and the cylindrical cam (29) is rotatably connected to the connecting arm (31).

7. A sootblowing device according to claim 5, characterized in that: A knocking plate (33) in contact with the knocking rod (27) is fixedly connected to the cleaning ring (21).

Images