Cleaning device for coal drop pipe of circulating fluidized bed boiler

Abstract

The utility model provides a circulating fluidized bed boiler coal drop pipe cleaning device which comprises a support fixedly connected to the outer wall of a coal drop pipe, a pull rod is arranged on the support in a penetrating mode, the lower end of the pull rod is fixedly connected with a knocking plate attached to the outer wall of the coal drop pipe, the pull rod is sleeved with a spring compressed between the support and the knocking plate, and the upper end of the pull rod is fixedly connected with a shifting rod. The shifting rod abuts against the inner wall of a transmission cylinder, the transmission cylinder is connected with a motor fixedly connected to the support, bosses evenly distributed in the circumferential direction are arranged on the inner wall of the transmission cylinder, and the height of the bosses is decreased in the rotating direction of the transmission cylinder. According to the device, the motor drives the transmission cylinder to rotate, the knocking plate attached to the outer wall of the coal drop pipe is intermittently lifted through the boss, and therefore intermittent knocking on the coal drop pipe is achieved, raw coal adhering to the pipe wall falls off under the knocking effect, and smoothness of the coal drop pipe is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of circulating fluidized bed boiler feeding, and in particular to a circulating fluidized bed boiler coal drop pipe cleaning device. Background Art

[0002] The coal drop pipe is a raw coal conveying pipe arranged between the furnace inlet and the coal feeder of a circulating fluidized bed boiler, and the coal drop pipe is generally arranged at an angle. Due to the high-temperature coal particles and flue gas in the furnace, the raw coal is easily evaporated and adhered to the pipe wall in the coal drop pipe, which is difficult to clean and affects the normal conveying of the raw coal. Therefore, the inventor proposes a circulating fluidized bed boiler coal drop pipe cleaning device. Utility Model Content

[0003] The purpose of the present application is to propose a circulating fluidized bed boiler coal chute cleaning device, which can produce intermittent knocking on the coal chute, so that the raw coal adhered to the tube wall falls off under the knocking action, ensuring the smooth flow of the coal chute.

[0004] The embodiment of the present application is implemented as follows:

[0005] The present application provides a circulating fluidized bed boiler coal drop pipe cleaning device, comprising a bracket fixedly connected to the outer wall of the coal drop pipe, a pull rod passing through the bracket, a knocking plate fixedly connected to the lower end of the pull rod and fitted with the outer wall of the coal drop pipe, a spring compressed between the bracket and the knocking plate is sleeved on the pull rod, a shift rod is fixedly connected to the upper end of the pull rod, the shift rod abuts against the inner wall of a transmission cylinder, the transmission cylinder is connected to a motor fixedly connected to the bracket, the inner wall of the transmission cylinder is provided with bosses evenly distributed along the circumferential direction, and the height of the bosses decreases along the rotation direction of the transmission cylinder.

[0006] The present application uses a motor to drive the transmission cylinder to rotate, and uses a boss to intermittently lift the knocking plate attached to the outer wall of the coal drop pipe, thereby achieving intermittent knocking on the coal drop pipe, so that the raw coal adhered to the pipe wall falls off under the action of knocking, ensuring the smooth flow of the coal drop pipe.

[0007] In an optional embodiment, the bracket is arranged parallel to the axis of the coal drop pipe.

[0008] In an optional embodiment, a through hole for passing the pull rod is opened on the bracket.

[0009] In an optional embodiment, the axis of the through hole is arranged perpendicular to the bracket.

[0010] In an optional embodiment, an inwardly protruding clamping strip is provided on the inner wall of the through hole.

[0011] In an optional embodiment, the clamping strip is arranged parallel to the axis of the through hole.

[0012] In an optional embodiment, a sliding groove for engaging the card strip is provided on the outer wall of the pull rod.

[0013] In an optional embodiment, the shifting rod and the pulling rod are arranged vertically.

[0014] In an optional embodiment, the shift rod is arranged parallel to the axis of the transmission cylinder.

[0015] In an optional embodiment, the knocking plate is configured to be in an arc shape that matches the outer shape of the coal drop pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described below are only used to explain the present application, rather than to limit the scope of the present application. In the accompanying drawings:

[0017] Figure 1 is a schematic diagram of a circulating fluidized bed boiler coal drop pipe cleaning device according to an embodiment of the present application;

[0018] Figure 2 is a schematic diagram of a bracket according to an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of a transmission cylinder according to an embodiment of the present application;

[0020] Reference numerals:

[0021] 10. Coal drop pipe;

[0022] 20. Bracket;

[0023] 30. Pull rod;

[0024] 40. Knock board;

[0025] 50. Transmission cylinder;

[0026] 60. Motor;

[0027] 70. Furnace wall;

[0028] 80. Coal feeder discharge pipe;

[0029] 21. Through hole;

[0030] 22. Card strip;

[0031] 31. Spring;

[0032] 32. Lever;

[0033] 33. Chute;

[0034] 51. Boss. DETAILED DESCRIPTION

[0035] Example 1

[0036] See also Figure 1-Figure 3 This embodiment provides a circulating fluidized bed boiler coal chute cleaning device to solve the problem that the raw coal adhered to the inner wall of the existing coal chute is difficult to clean.

[0037] In this embodiment, the circulating fluidized bed boiler coal drop pipe cleaning device includes a bracket 20 fixedly connected to the outer wall of the coal drop pipe 10, a pull rod 30 is passed through the bracket 20, the lower end of the pull rod 30 is fixedly connected to a knocking plate 40 that fits the outer wall of the coal drop pipe 10, the pull rod 30 is sleeved with a spring 31 compressed between the bracket 20 and the knocking plate 40, the upper end of the pull rod 30 is fixedly connected to a lever 32, the lever 32 abuts against the inner wall of a transmission cylinder 50, the transmission cylinder 50 is connected to a motor 60 fixedly connected to the bracket 20, the inner wall of the transmission cylinder 50 is provided with bosses 51 evenly distributed along the circumferential direction, and the height of the bosses 51 decreases along the rotation direction of the transmission cylinder 50.

[0038] In this embodiment, the transmission cylinder 50 is driven to rotate by the motor 60, and the boss 51 is used to intermittently lift the knocking plate 40 attached to the outer wall of the coal drop pipe 10, thereby achieving intermittent knocking of the coal drop pipe 10, so that the raw coal adhered to the pipe wall falls off under the knocking action, ensuring the smooth flow of the coal drop pipe.

[0039] It should be noted that the upper end of the coal drop pipe 10 is connected to the coal feeder discharge pipe 80, and the lower end of the coal drop pipe 10 is connected to the furnace wall 70 of the circulating fluidized bed boiler. The raw coal inside the coal drop pipe 10 slides into the circulating fluidized bed boiler under the action of gravity.

[0040] In addition, the bracket 20 is integrally welded to the outer wall of the coal dropping pipe 10, and the bracket 20 as a whole is arranged parallel to the axis of the coal dropping pipe 10. A through hole 21 is opened on the bracket 20, and the axis of the through hole 21 is arranged perpendicular to the bracket 20. The through hole 21 is used to pass the pull rod 30. An inwardly protruding clamping strip 22 is provided on the inner wall of the through hole 21, and the clamping strip 22 is arranged parallel to the axis of the through hole 21. The clamping strip 22 is used to slidably engage with the pull rod 30, thereby limiting the rotation of the pull rod 30 inside the through hole 21, so that the pull rod 30 is only allowed to slide along the axial direction of the through hole 21.

[0041] In addition, the pull rod 30 as a whole can be slidably inserted into the through hole 21, and a sliding groove 33 for clamping the clamping strip 22 is opened on the outer wall of the pull rod 30, the knocking plate 40 is welded to the lower end of the pull rod 30, and the pull rod 30 is arranged as a whole in the middle position of the longitudinal direction of the knocking plate 40, the knocking plate 40 is constructed into an arc shape that is adapted to the outer shape of the coal drop pipe 10, the spring 31 is integrally sleeved on the outside of the pull rod 30, and the spring 31 is compressed between the knocking plate 40 and the bracket 20, the spring 31 is used to make the knocking plate 40 and the coal drop pipe 10 fit together, the lever 32 is welded to the upper end of the pull rod 30, and the lever 32 and the pull rod 30 are kept vertically arranged.

[0042] It should also be noted that the motor 60 is fixedly connected to the bracket 20 as a whole, the transmission cylinder 50 is fixedly connected to the output shaft of the motor 60, and the transmission cylinder 50 and the output shaft of the motor 60 are coaxially arranged, the motor 60 is used to drive the transmission cylinder 50 to rotate, the boss 51 is welded to the inner wall of the transmission cylinder 50, and the boss 51 is arranged parallel to the axis of the transmission cylinder 50 as a whole, a plurality of bosses 51 are evenly distributed along the circumference of the transmission cylinder 50, and the height of the boss 51 decreases along the rotation direction of the transmission cylinder 50; the shift rod 32 extends into the interior of the transmission cylinder 50, and the shift rod 32 is arranged parallel to the axis of the transmission cylinder 50, and the shift rod 32 is always in contact with the inner wall of the transmission cylinder 50.

[0043] When in use, the motor 60 drives the transmission cylinder 50 to rotate. When the lever 32 contacts the boss 51, the boss 51 will lift the lever 32, and then drive the knocking plate 40 to lift through the pull rod 30, so that the knocking plate 40 is separated from the coal drop pipe 10, and the spring 31 is further compressed. As the transmission cylinder 50 continues to rotate, when the lever 32 is separated from the boss 51, the knocking plate 40 will move toward the coal drop pipe 10 under the push of the spring 31, and knock on the coal drop pipe 10. The raw coal adhered to the inner wall of the coal drop pipe 10 is separated under the knocking action, thereby achieving the cleaning of the coal drop pipe 10.

[0044] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A circulating fluidized bed boiler coal drop pipe cleaning device, characterized in that: It includes a bracket fixedly connected to the outer wall of the coal dropping pipe, a pull rod is passed through the bracket, a knocking plate is fixedly connected to the lower end of the pull rod and fits the outer wall of the coal dropping pipe, a spring is sleeved on the pull rod and compressed between the bracket and the knocking plate, a shift rod is fixedly connected to the upper end of the pull rod, the shift rod abuts against the inner wall of a transmission cylinder, the transmission cylinder is connected to a motor fixedly connected to the bracket, the inner wall of the transmission cylinder is provided with bosses evenly distributed along the circumferential direction, and the height of the bosses decreases along the rotation direction of the transmission cylinder.

2. The circulating fluidized bed boiler coal drop pipe cleaning device according to claim 1, characterized in that: The bracket is arranged parallel to the axis of the coal dropping pipe.

3. The circulating fluidized bed boiler coal drop pipe cleaning device according to claim 2, characterized in that: The bracket is provided with a through hole for passing the pull rod.

4. The circulating fluidized bed boiler coal drop pipe cleaning device according to claim 3, characterized in that: The axis of the through hole is arranged perpendicular to the bracket.

5. The circulating fluidized bed boiler coal drop pipe cleaning device according to claim 4, characterized in that: An inwardly protruding clamping strip is provided on the inner wall of the through hole.

6. The circulating fluidized bed boiler coal drop pipe cleaning device according to claim 5, characterized in that: The clamping strip is arranged parallel to the axis of the through hole.

7. The circulating fluidized bed boiler coal drop pipe cleaning device according to claim 6, characterized in that: A sliding groove for clamping the clamping strip is provided on the outer wall of the pull rod.

8. The circulating fluidized bed boiler coal drop pipe cleaning device according to claim 7, characterized in that: The shifting rod and the pulling rod are arranged vertically.

9. The circulating fluidized bed boiler coal drop pipe cleaning device according to claim 8, characterized in that: The shifting rod is arranged parallel to the axis of the transmission cylinder.

10. The circulating fluidized bed boiler coal drop pipe cleaning device according to claim 9, characterized in that: The knocking plate is configured to be in an arc shape that matches the outer shape of the coal drop pipe.

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