Blast cap of boiler return feeder

Abstract

The utility model discloses a boiler return feeder wind cap, which comprises a main body unit, the main body unit comprises a wind cap sleeve and a wind cap head, the upper end of the wind cap sleeve is fixedly provided with a connecting pipe, the lower end of the wind cap head is fixedly connected with a middle pipe, the lower end of the middle pipe is fixedly connected with a threaded pipe, and the threaded pipe is fixedly connected with the wind cap sleeve. A threaded hole matched with the threaded pipe is formed in the upper end of the connecting pipe, and the connecting pipe is connected with the middle pipe in a meshed mode. The wind cap has the beneficial effects that when the wind cap is disassembled, the two push blocks are pulled to move oppositely, the push blocks drive the sliding blocks to move oppositely and compress the reset springs, the sliding blocks and the push rods drive the arc-shaped toothed plates to move oppositely and be separated from the toothed ring, and then the wind cap head is rotated, so that the threaded pipe is separated from the connecting pipe; and therefore, the air cap head can be quickly and conveniently disassembled, and the difficulty of cleaning and maintaining the air cap is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to an air cap of a boiler return feeder. Background Art

[0002] Circulating fluidized bed boilers have the advantages of a wide fuel adaptability range, high in-furnace desulfurization efficiency, low nitrogen oxide emissions, high combustion efficiency, a large load regulation ratio, and comprehensive utilization of ash and slag, and are widely used in the fields of power station boilers, industrial boilers, etc. The air cap of the boiler return feeder in a circulating fluidized bed boiler is also an important component. The air cap of the boiler return feeder is installed on the air distribution plate inside the boiler return feeder. The air cap of the return feeder is communicated with the return air chamber and the loosening air chamber. After the high-temperature materials separated by the separator are fluidized through the air inlet of the air cap of the return feeder, they return to the furnace for combustion and circulation under the action of the air pressure.

[0003] During the operation of the current boiler return feeder, the air outlet holes of the air cap are often challenged by being blocked by sundries, which leads to the frequent need for regular cleaning and maintenance of the air cap. However, most of the existing air cap designs adopt a welding fixation method, making the disassembly process relatively cumbersome and inconvenient, thus increasing the difficulty of cleaning and maintaining the air cap.

[0004] Therefore, an air cap of a boiler return feeder is needed to solve the above problems. Summary of the Utility Model

[0005] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and the title of the description of this application, to avoid obscuring the purpose of this part, the abstract, and the title of the utility model. However, such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the above problems of an air cap of a boiler return feeder, the utility model is proposed.

[0007] Therefore, the purpose of the utility model is to provide an air cap of a boiler return feeder, which is used to solve problems such as "most of the existing air cap designs adopt a welding fixation method, making the disassembly process relatively cumbersome and inconvenient, thus increasing the difficulty of cleaning and maintaining the air cap".

[0008] To solve the above technical problems, the utility model provides the following technical solution: An air cap of a boiler return feeder, comprising:

[0009] The main body unit, the main body unit includes a wind cap sleeve and a wind cap head. A connecting pipe is fixedly installed at the upper end of the wind cap sleeve. The lower end of the wind cap head is fixedly connected with an intermediate pipe. The lower end of the intermediate pipe is fixedly connected with a threaded pipe. A threaded hole matching the threaded pipe is opened at the upper end of the connecting pipe. The connecting pipe and the intermediate pipe are meshed and connected.

[0010] The auxiliary fixing unit, two groups of the auxiliary fixing units are provided. Each group of the auxiliary fixing units includes a straight cylinder. Each straight cylinder is fixedly connected to the upper end of the connecting pipe. A slider is slidably connected to the inner wall of each straight cylinder. A push block is fixedly connected to the upper end of each slider. A return spring is fixedly connected to the opposite side of each slider. A push rod is fixedly connected to the opposite side of each slider. The other end of each push rod is fixedly connected with an arc-shaped tooth plate. The auxiliary fixing unit further includes a toothed ring. The toothed ring is fixedly sleeved on the intermediate pipe.

[0011] As a preferred scheme of the wind cap of a boiler return feeder of the present utility model, wherein: through holes are opened at the upper ends of the two straight cylinders. One end of each of the two push blocks penetrates through the through hole and is slidably connected in the through hole.

[0012] As a preferred scheme of the wind cap of a boiler return feeder of the present utility model, wherein: a plurality of air outlet holes are equidistantly opened on the side wall of the wind cap head. A welding pipe is fixedly connected to the lower end of the wind cap sleeve.

[0013] As a preferred scheme of the wind cap of a boiler return feeder of the present utility model, wherein: one end of each of the two push rods penetrates through one end of the straight cylinder. The two push rods are respectively slidably connected in the inner walls of the two straight cylinders.

[0014] As a preferred scheme of the wind cap of a boiler return feeder of the present utility model, wherein: the opposite ends of the two arc-shaped tooth plates are both abutted against the toothed ring. The two arc-shaped tooth plates are both meshed with the toothed ring.

[0015] As a preferred scheme of the wind cap of a boiler return feeder of the present utility model, wherein: the opposite ends of the two return springs departing from the sliders are both fixedly connected to the inner wall of the straight cylinder.

[0016] The beneficial effects of the present utility model:

[0017] During disassembly, pull the two push blocks to move away from each other. Drive the sliders to move away from each other and compress the return springs through the push blocks. Drive the arc-shaped tooth plates to move away from each other and separate from the toothed ring through the sliders and push rods. Then rotate the wind cap head to separate the threaded pipe from the connecting pipe, so that the wind cap head can be quickly and conveniently disassembled, thereby reducing the difficulty of cleaning and maintaining the wind cap. Description of the drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0019] Figure 1 It is a front structural schematic diagram of a wind cap of a boiler return feeder of the present utility model.

[0020] Figure 2 It is a structural schematic diagram of the wind cap head in a wind cap of a boiler return feeder of the present utility model.

[0021] Figure 3 It is a structural schematic diagram of an auxiliary fixing unit in a wind cap of a boiler return feeder of the present utility model.

[0022] Figure 4 is Figure 3 an enlarged structural schematic diagram of part A in

[0023] Description of the drawings: 100, main body unit; 101, wind cap sleeve; 102, wind cap head; 102a, air outlet; 103, connecting pipe; 104, intermediate pipe; 105, threaded pipe; 106, welding pipe; 200, auxiliary fixing unit; 201, straight cylinder; 202, slider; 203, return spring; 204, push block; 205, arc-shaped tooth plate; 206, tooth ring. Detailed implementation manners

[0024] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present utility model in conjunction with the drawings in the specification.

[0025] In the following description, many specific details are set forth to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0026] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present utility model. The "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0027] Next, the present utility model will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present utility model in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally in a non-general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0028] Referring to Figures 1-4 , an embodiment of the present utility model provides a boiler return air cap, which includes:

[0029] A main body unit 100, the main body unit 100 includes a wind cap sleeve 101 and a wind cap head 102. A connecting pipe 103 is fixedly installed at the upper end of the wind cap sleeve 101. The lower end of the wind cap head 102 is fixedly connected to an intermediate pipe 104. The lower end of the intermediate pipe 104 is fixedly connected to a threaded pipe 105. A threaded hole matching the threaded pipe 105 is opened at the upper end of the connecting pipe 103, and the connecting pipe 103 and the intermediate pipe 104 are meshed and connected;

[0030] An auxiliary fixing unit 200, the auxiliary fixing unit 200 is provided in two groups. Each group of the auxiliary fixing unit 200 includes a straight cylinder 201. Each straight cylinder 201 is fixedly connected to the upper end of the connecting pipe 103. A slider 202 is slidably connected to the inner wall of each straight cylinder 201. A push block 204 is fixedly connected to the upper end of each slider 202. A return spring 203 is fixedly connected to the opposite side of each slider 202. A push rod is fixedly connected to the opposite side of each slider 202. The other end of each push rod is fixedly connected to an arc-shaped tooth plate 205. The auxiliary fixing unit 200 further includes a tooth ring 206, and the tooth ring 206 is fixedly sleeved on the intermediate pipe 104.

[0031] When disassembling, pull the two push blocks 204 to move away from each other. Drive the sliders 202 to move away from each other and compress the return springs 203 through the push blocks 204. Drive the arc-shaped tooth plates 205 to move away from each other and separate from the tooth ring 206 through the sliders 202 and the push rods. Then rotate the wind cap head 102 to separate the threaded pipe 105 from the connecting pipe 103, so that the wind cap head 102 can be quickly and conveniently disassembled, thereby reducing the difficulty of cleaning and maintaining the wind cap.

[0032] Wherein, through holes are opened at the upper ends of the two straight cylinders 201. One end of each of the two push blocks 204 penetrates through the through holes and is slidably connected in the through holes, and the push blocks 204 drive the sliders 202 to move.

[0033] Wherein, a plurality of air outlet holes 102a are equidistantly arranged on the side wall of the wind cap head 102, and a welding pipe 106 is fixedly connected to the lower end of the wind cap sleeve 101.

[0034] One end of each of the two push rods penetrates through one end of the straight cylinder 201, and the two push rods are respectively slidably connected to the inner walls of the two straight cylinders 201, and the arc-shaped toothed plate 205 is driven to move by the push rods.

[0035] One end of each of the two arc-shaped toothed plates 205 abuts against the toothed ring 206, and the two arc-shaped toothed plates 205 are both engaged with the toothed ring 206. The arc-shaped toothed plates 205 can limit the toothed ring 206 to prevent loosening.

[0036] One end of each of the two return springs 203 facing away from the slider 202 is fixedly connected to the inner wall of the straight cylinder 201, and the return springs 203 can reset the slider 202.

[0037] Working principle: When disassembly is required, the two push blocks 204 are pulled to move away from each other. The slider 202 is driven to move away from each other by the push blocks 204 and the return springs 203 are compressed. The arc-shaped toothed plate 205 is driven to move away from each other by the slider 202 and the push rods and separated from the toothed ring 206. Then the wind cap head 102 is rotated to separate the threaded pipe 105 from the connecting pipe 103, so that the wind cap head 102 can be quickly and conveniently disassembled, thereby reducing the difficulty of cleaning and maintaining the wind cap. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A boiler return hood, characterized in that: include: A main body unit (100), the main body unit (100) comprising a hood sleeve (101) and a hood head (102), the upper end of the hood sleeve (101) being fixedly mounted with a connecting pipe (103), the lower end of the hood head (102) being fixedly connected with an intermediate pipe (104), the lower end of the intermediate pipe (104) being fixedly connected with a threaded pipe (105), the upper end of the connecting pipe (103) being provided with a threaded hole matching the threaded pipe (105), the connecting pipe (103) being meshingly connected with the intermediate pipe (104); An auxiliary fixing unit (200), wherein the auxiliary fixing unit (200) is arranged in two groups, each group of the auxiliary fixing units (200) comprises a straight cylinder (201), each straight cylinder (201) is fixedly connected to the upper end of the connecting tube (103), a slider (202) is slidably connected to the inner wall of each straight cylinder (201), the upper end of each slider (202) is fixedly connected to a push block (204), the opposite side of each slider (202) is fixedly connected to a return spring (203), the opposite side of each slider (202) is fixedly connected to a push rod, and the other end of each push rod is fixedly connected to an arc-shaped toothed plate (205), and the auxiliary fixing unit (200) further comprises a toothed ring (206), and the toothed ring (206) is fixedly sleeved on the intermediate tube (104).

2. A boiler return device hood according to claim 1, characterized in that: The upper ends of the two straight cylinders (201) are each provided with a through hole, and one end of the two push blocks (204) passes through the through hole and is slidably connected in the through hole.

3. The boiler return device hood according to claim 1, characterized in that: A plurality of air outlet holes (102a) are provided at equal intervals on the side wall of the hood head (102), and a welding pipe (106) is fixedly connected to the lower end of the hood sleeve (101).

4. A boiler return device hood according to claim 1, characterized in that: One end of the two push rods passes through one end of the straight cylinder (201), and the two push rods are respectively slidably connected in the inner walls of the two straight cylinders (201).

5. The boiler return device hood according to claim 1, characterized in that: The opposite ends of the two arc-shaped tooth plates (205) are both against the toothed ring (206), and the two arc-shaped tooth plates (205) are both meshed with the toothed ring (206).

6. A boiler return device hood according to claim 1, characterized in that: One end of the two return springs (203) facing away from the slider (202) is fixedly connected to the inner wall of the straight cylinder (201).

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