Pipe orifice plugging device for circulating fluidized bed boiler pipe type air preheater
By designing a pipe outlet plugging device for the circulating fluidized bed boiler tube air preheater, the combination of the transmission rod and external threads is used to seal the ventilation frame, which solves the leakage problem caused by the boiler exhaust corrosion and effectively reduces air pollution.
Patent Information
- Application Number
- CN202421650420.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-12
AI Technical Summary
After long-term use of the tube air preheater, the pipe wall is easily corroded by the boiler exhaust gas, resulting in leakage. If it is not blocked in time, it will cause pollution to the environment.
A circulating fluidized bed boiler tube-type air preheater pipe outlet leakage plug device is designed, including the front cover plate, the rear cover plate, the ventilation frame, the guide hole and the conical plug block. The ventilation frame is sealed through the cooperation of the transmission rod and the external thread.
The device can easily seal the tube air preheater, effectively reducing air pollution and solving leakage problems.
Smart Images
Figure CN222881784U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a tube opening plugging device for a circulating fluidized bed boiler tubular air preheater, belonging to the technical field of tube opening plugging for tubular air preheaters. Background Art
[0002] The tubular air preheater can use the heat of the flue gas at the tail of the boiler to heat the air used for fuel combustion. However, after a long period of use, the tube wall of the tubular air preheater will be corroded by the boiler tail gas, causing leakage in the tubular air preheater. If it is not sealed in time, it will cause great pollution to the environment. In order to solve the above problems, a new technical solution is provided. Utility Model Content
[0003] The utility model aims to provide a tube opening plugging device for a circulating fluidized bed boiler tubular air preheater to solve the problems raised in the above-mentioned background technology.
[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pipe opening plugging device for a tubular air preheater of a circulating fluidized bed boiler, comprising a front cover plate, on which a front docking hole, a guide hole and a ventilation frame are arranged, the front docking hole is opened at the corner of the front cover plate, the guide holes are symmetrically opened at the upper and lower sides of the middle of the front cover plate, the ventilation frame is welded in the middle of the rear end of the front cover plate, a rear cover plate is placed at the rear end of the ventilation frame, a rear docking hole and a U-shaped bracket are arranged on the rear cover plate, the rear docking hole is opened at the corner of the rear cover plate, and the rear docking hole is connected to the front docking hole by a bolt, the U-shaped bracket is welded in the middle of the rear end of the rear cover plate, and a screw hole is opened in the middle of the U-shaped bracket.
[0005] Preferably, a baffle is placed at the front end of the ventilation frame, and a guide shaft and a conical block are provided on the baffle. The guide shaft is symmetrically installed and fixed at the upper and lower sides of the middle of the rear end of the baffle by screws, and the guide shaft is nested in the guide hole, and the conical block is integrally formed and connected to the middle of the rear end of the baffle.
[0006] Preferably, a transmission rod is interference-connected in the middle of the rear end of the conical block via a bearing, and an external thread is provided at the rear end of the transmission rod.
[0007] Preferably, the external thread is threadedly connected to the screw hole.
[0008] Compared with the prior art, the beneficial effects of the utility model are: the external thread of the utility model is threadedly connected with the screw hole, which can easily drive the transmission rod to move forward and backward; the guide shaft is embedded in the guide hole, so that the baffle can easily move forward and backward along the guide hole; the rear docking hole is connected with the front docking hole by bolts, and the front and rear cover plates can be easily installed and fixed on the tubular air preheater; based on the above, the utility model can easily seal the tubular air preheater, effectively reducing air pollution. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the structure of the utility model;
[0010] Figure 2 This is a schematic diagram of the structure of the front cover of the utility model;
[0011] Figure 3 This is a schematic diagram of the structure of the conical blocking block of the utility model;
[0012] In the figure: 1-front cover; 2-front docking hole; 3-guide hole; 4-ventilation frame; 5-rear cover; 6-rear docking hole; 7-U-shaped bracket; 8-bolt; 9-screw hole; 10-baffle; 11-guide shaft; 12-conical block; 13-transmission rod; 14-external thread. DETAILED DESCRIPTION
[0013] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0014] like Figure 1-3 As shown, a leak plugging device for a tube-type air preheater of a circulating fluidized bed boiler comprises a front cover plate 1, on which a front docking hole 2, a guide hole 3 and a ventilation frame 4 are arranged, the front docking hole 2 is arranged at the corner of the front cover plate 1, the guide holes 3 are arranged symmetrically at the upper and lower sides of the middle of the front cover plate 1, the ventilation frame 4 is welded to the middle of the rear end of the front cover plate 1, a rear cover plate 5 is placed at the rear end of the ventilation frame 4, a rear docking hole 6 and a U-shaped bracket 7 are arranged on the rear cover plate 5, the rear docking hole 6 is arranged at the corner of the rear cover plate 5, and the rear docking hole 6 is connected to the front docking hole 2 by a bolt 8, and the U-shaped bracket 7 is welded to the middle of the rear end of the rear cover plate 5, and a screw hole 9 is opened in the middle of the U-shaped bracket 7, a baffle 10 is placed at the front end of the ventilation frame 4, and a guide shaft 11 and a conical block 12 are arranged on the baffle 10, the guide shaft 11 is symmetrically installed and fixed to the upper and lower sides of the middle of the rear end of the baffle 10 by screws, and the guide shaft 11 is nested in the guide hole 3, the conical block 12 is integrally formed and connected to the middle of the rear end of the baffle 10, and a transmission rod 13 is connected to the middle of the rear end of the conical block 12 through a bearing interference fit, and an external thread 14 is opened at the rear end of the transmission rod 13, and the external thread 14 is threadedly connected to the screw hole 9.
[0015] Specific usage: place the front cover 1 at the front end of the tube air preheater, make the ventilation frame 4 connect with the tube air preheater, place the rear cover 5 at the rear end of the tube air preheater, and then use the bolts 8 to pass through the front docking hole 2 and the rear docking hole 6 in sequence to firmly fix the front cover 1 and the rear cover 5 on the tube air preheater; when the flue gas at the tail end of the boiler flows into the tube air preheater through the ventilation frame 4 and corrodes the tube wall, causing the tube air preheater to leak, screw the transmission rod 13, and at this time the transmission rod 13 rotates around the screw hole 9 through the external thread 14, and the rotation of the transmission rod 13 drives the conical block 12 to move backward along the guide hole 3 to seal the ventilation frame 4.
[0016] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.
Claims
1. A leak plugging device for a tube-type air preheater of a circulating fluidized bed boiler, comprising a front cover plate (1), characterized in that: The front cover plate (1) is provided with a front docking hole (2), a guide hole (3) and a ventilation frame (4); the front docking hole (2) is opened at the corner of the front cover plate (1); the guide hole (3) is symmetrically opened at the upper and lower sides of the middle of the front cover plate (1); the ventilation frame (4) is welded to the middle of the rear end of the front cover plate (1); a rear cover plate (5) is placed at the rear end of the ventilation frame (4); the rear cover plate (5) is provided with a rear docking hole (6) and a U-shaped bracket (7); the rear docking hole (6) is opened at the corner of the rear cover plate (5), and the rear docking hole (6) is connected to the front docking hole (2) by a bolt (8); the U-shaped bracket (7) is welded to the middle of the rear end of the rear cover plate (5); A screw hole (9) is provided in the middle of the U-shaped bracket (7); a baffle (10) is placed at the front end of the ventilation frame (4); a guide shaft (11) and a conical block (12) are provided on the baffle (10); the guide shaft (11) is symmetrically fixed to the upper and lower sides of the middle of the rear end of the baffle (10) by screws, and the guide shaft (11) is nested in the guide hole (3); the conical block (12) is integrally formed and connected to the middle of the rear end of the baffle (10); a transmission rod (13) is connected to the middle of the rear end of the conical block (12) through a bearing interference fit; an external thread (14) is provided at the rear end of the transmission rod (13); and the external thread (14) is threadedly connected to the screw hole (9).