Soot blowing device

Abstract

The invention 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 in sliding connection with the outer pipe, 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 invention belongs to the technical field of soot blowers, and in particular relates to a soot blowing device. Background Art

[0002] A sootblower is a device used to remove soot deposits on the boiler heating surface. It is mainly used to ensure the normal operation of the boiler and improve its thermal efficiency. There are many different working principles and types of sootblower, including sonic sootblower, shock wave sootblower, rake sootblower, fixed rotary sootblower, and telescopic sootblower.

[0003] The existing telescopic soot blower can rotate while moving forward and backward to form a spiral moving track. However, the spiral tracks formed during the forward and backward movement overlap, resulting in some places not being cleaned properly. At the same time, the motor will also move with it, resulting in the need for a corresponding drag chain structure.

[0004] The invention patent application with patent application number 202210286843.7 discloses a threaded air soot blower, whose soot blowing threaded rod is connected with a moving device for driving the soot blowing outer tube to rotate and move, and two connecting frames 100 located at the lower position are provided with multiple brushing devices for brushing the outer wall of the soot blowing outer tube, which can clean the outer wall of the pipeline. It adopts a linear moving mechanism similar to a ball screw, which can ensure that the motor is in a fixed state during the movement, thereby eliminating the structural setting of the drag chain.

[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, and the long length easily causes the lead screw to deform over time. Moreover, it also cannot solve the problem of overlap of the spiral trajectory lines moving forward and backward. Summary of the invention

[0006] In view of the above technical problems, the present invention provides a sootblowing device, which adopts a screw-moving structural setting, and its long and short ends are close to the boiler only during 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: A sootblowing device comprises a frame and a sootblowing pipe, wherein the sootblowing pipe comprises an inner pipe and an outer pipe, wherein the inner pipe is slidably connected to the outer pipe, and the outer pipe is fixedly connected to the frame, and one end of the inner pipe can extend through the front end of the frame and is fixedly connected to a nozzle; a slide is rotatably connected to the inner pipe, and the slide is slidably connected to the frame; The frame is provided with a linear drive mechanism, which includes a fixed screw sleeve and a movable screw rod; a connecting frame is slidably connected to the frame, and the two ends of the movable screw rod are respectively fixedly connected to the sliding frame and the connecting frame; the fixed screw sleeve is threadedly connected to the movable screw, and a driving motor is fixed on the frame, and the fixed screw sleeve is driven to rotate by the driving motor; A worm wheel is fixedly connected to the inner tube, and a worm meshing with the worm wheel 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 meshes with the first gear to drive the worm to rotate, and when the slide moves forward, the second rack meshes 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.

[0008] The output shaft of the driving motor is fixedly connected with a driving gear, and the fixed screw sleeve is fixedly connected with a transmission gear meshing with the driving gear.

[0009] A cleaning box is fixedly connected to the front end of the frame, a suction pipe is connected to the cleaning box, and the inner tube passes through the cleaning box and the front end of the frame in sequence and extends out; a cleaning component is arranged in the cleaning box, and the outer surface of the inner tube is cleaned by the cleaning component.

[0010] The cleaning assembly includes a cleaning ring and a knocking assembly. The cleaning ring is fixedly connected to the cleaning box via a spring. The cleaning ring is sleeved outside 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.

[0011] 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.

[0012] 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.

[0013] A knocking plate in contact with the knocking rod is fixedly connected to the cleaning ring.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The movement of the movable screw is achieved by rotating the fixed screw sleeve, thereby driving the corresponding inner tube to move forward and extend into the boiler. In this structural setting, the movement of the inner tube is achieved by moving the movable screw, so that the length of the movable screw is shortened, and the end of the movable screw will only approach the boiler when dust cleaning is required, reducing the possibility of deformation.

[0015] 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 one-way bearings, so that the worm is driven to rotate by the meshing of gears and racks with different gear ratios during the forward and backward movement, 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.

[0016] 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

[0017] Figure 1 It is a structural schematic diagram of one aspect of the present invention; Figure 2 It is a structural schematic diagram of another aspect of the present invention; Figure 3 It is a structural schematic diagram of another aspect of the present invention; Figure 4 yes Figure 3 A partial enlarged view of the middle A; Figure 5 It is a front view of the present invention; Figure 6 It is a schematic diagram of the internal structure of the cleaning box of the present invention; Figure 7 It is a structural schematic diagram of the striking component of the present invention; Figure 8 It is a structural schematic diagram of the cylindrical cam of the present invention; Wherein: 1 is a frame, 100 is a connecting frame, 2 is a sootblowing 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 driving 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 driving 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 supporting 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

[0018] 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.

[0019] like Figure 1-8 As shown, a sootblowing device comprises a frame 1 and a sootblowing pipe 2, the sootblowing pipe 2 comprises an inner pipe 3 and an outer pipe 4, the inner pipe 3 is slidably connected to the outer pipe 4, 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 the slide 6 is slidably connected to the frame 1. The outer pipe 4 is connected to a steam pipeline through a valve assembly.

[0020] A linear drive mechanism is provided on the frame 1, and the inner tube 3 is moved forward and backward by the linear drive mechanism. The linear drive mechanism includes a fixed screw sleeve 7 and a movable screw rod 8; the length of the movable screw rod 8 is about half of the length of the frame 1, and the overall length is short.

[0021] A connecting frame 100 is slidably connected to the frame body 1, and the two ends of the moving 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 moving screw 8, and a driving motor 9 is fixed to the frame body 1, and the fixed screw sleeve 7 is driven to rotate by the driving motor 9. When the fixed screw sleeve 7 rotates, the moving screw 8 moves, thereby driving the slide 6 and the connecting frame 100 to move accordingly.

[0022] A worm wheel 10 is fixedly connected to the inner tube 3, and a worm 11 meshing with the worm wheel 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.

[0023] That is, the rotation directions of the two single bearings are different, so that 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.

[0024] At the same time, the gear rack mechanism setting realizes the rotation of the inner tube 3 during the movement, so that the nozzle 5 (inner tube 3) moves in a spiral trajectory. The forward movement and the backward movement are respectively driven by the gear racks with different transmission ratios, so that the spiral trajectory lines formed in the forward and backward movement are different and will not overlap, thereby increasing the scope of the purge and avoiding the situation of incomplete cleaning.

[0025] 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.

[0026] Furthermore, since the inner tube 3 extends into 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, and a suction pipe 20 is connected to the cleaning box 19, and the suction pipe 20 is connected to a suction machine.

[0027] The inner tube 3 passes 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 accumulated dust is sucked out through the exhaust pipe 20, and specifically can be sucked to the dust removal device by an exhaust fan.

[0028] 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 through a spring 23. The cleaning ring 21 is sleeved outside the inner tube 3. A circle of bristles 24 in contact with 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 the outer wall of the cleaning ring 21. The dust and dirt attached to the bristles 24 and the cleaning ring 21 can be knocked off, thereby achieving self-cleaning.

[0029] 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 is in contact with the outer surface of the inner tube 3, and the cylindrical cam 29 is driven 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.

[0030] 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 to move and compress the push spring 28; when the cylindrical cam 29 rotates to the highest point, the connecting rod 30 does not contact the cam surface of the cylindrical cam 29, and the push spring 28 releases elastic potential energy to drive the knocking rod 27 to move in the opposite direction to intermittently knock the cleaning ring 21. The cam surface can be specifically set according to actual needs, and can also adopt the structure shown in the attached figure.

[0031] Furthermore, in order to make the cylindrical cam 29 better fit the inner tube 3, 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.

[0032] 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 ).

[0033] 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: The soot blowing pipe (2) comprises an inner pipe (3) and an outer pipe (4), the inner pipe (3) being slidably connected to the outer pipe (4), the outer pipe (4) being fixedly connected to the frame (1), one end of the inner pipe (3) being able to pass through the front end of the frame (1) and extending out and being fixedly connected to a nozzle (5); a slide frame (6) being rotatably connected to the inner pipe (3), and the slide frame (6) being slidably connected to the frame (1); The frame (1) is provided with a linear drive mechanism, which comprises 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 respectively fixedly connected to the sliding frame (6) and the connecting frame (100); 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 two ends of the worm gear (11) are respectively 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); 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) in contact with the outer wall of the inner tube (3) is fixed inside the cleaning ring (21); a circle of through holes (25) is formed on the cleaning ring (21); and 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) comprises a support frame (26) and a knocking rod (27), the knocking rod (27) being slidably connected to the support frame (26), a push spring (28) being provided between the knocking rod (27) and the support frame (26), a rotatable cylindrical cam (29) being connected to the support frame (26), the cylindrical cam (29) being in contact with the outer surface of the inner tube (3), and the cylindrical cam (29) being driven to rotate by the inner tube (3); and a connecting rod (30) matching the cylindrical cam (29) being fixedly connected to the knocking rod (27).

6. A sootblowing device according to claim 5, characterized in that: A connecting arm (31) is hingedly connected to 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).

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