Air inlet pipe structure of high-temperature fan

Abstract

The utility model discloses an air inlet pipe structure of a high-temperature fan, which relates to the technical field of kiln tail high-temperature fans of cement production lines, has the advantages of increasing air ducts for feeding air into the high-temperature fan so as to facilitate the operation of the high-temperature fan, and adopts the technical scheme that the air inlet pipe structure comprises a bypass air pipe and an inclined air pipe which is communicated with the bypass air pipe and extends upwards in an inclined manner, the inclined air pipe is connected with an outlet of the waste heat boiler through a pipeline, sealing pieces for sealing the bypass air pipe and the pipeline are arranged on the bypass air pipe and the pipeline, the included angle between the inclined air pipe and the bypass air pipe is 50 + / -5 degrees, and the lower end of the bypass air pipe is connected with an air inlet of a high-temperature fan.

Description

Technical Field

[0001] The utility model relates to the technical field of the tail-end high-temperature fan of a cement production line, in particular to an air inlet pipe structure of a high-temperature fan. Background Art

[0002] The main function of the tail-end high-temperature fan is to provide the power for the gas flow of the kiln system and the preheater system, so as to generate negative pressure in the system environment, thereby promoting the normal operation of the system.

[0003] The tail-end high-temperature fan is located behind the preheater. If there is waste heat power generation, the waste heat boiler is a key device in the waste heat power generation system. Then the air duct of the preheater is connected to the waste heat boiler. The air coming out of the preheater passes through the tail-end waste heat boiler. After heat exchange in the waste heat boiler, the air temperature drops to about 220 °C. What the outlet of the waste heat boiler is connected to through a pipeline is the high-temperature fan. The high-temperature fan is designed advancedly, with the characteristics of stable operation, large strength, long service life, etc., and is wear-resistant, high-temperature resistant, with an efficiency of more than 85%, low noise, and a large flow regulation range.

[0004] However, the air inlet of the above-mentioned existing structure high-temperature fan only relies on the pipeline ventilation at the outlet of the waste heat boiler. If the waste heat power generation cannot work, the waste heat boiler cannot provide the air inlet volume for the high-temperature fan, affecting the operation of the high-temperature fan. Therefore, the applicant has developed a new technical solution in the actual production process to solve the above technical problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide an air inlet pipe structure of a high-temperature fan, which has the advantage of increasing the air duct for the air inlet of the high-temperature fan to facilitate the operation of the high-temperature fan.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] The utility model provides an air inlet pipe structure of a high-temperature fan, including a bypass air duct and an inclined air duct extending obliquely upward and communicating with the bypass air duct. The inclined air duct is connected to the outlet of the waste heat boiler through a pipeline. Sealing members for sealing the bypass air duct and the pipeline are provided on both the bypass air duct and the pipeline. The included angle between the inclined air duct and the bypass air duct is 50 ± 5 °, and the lower end of the bypass air duct is connected to the air inlet of the high-temperature fan.

[0008] By adopting the above technical solution, when the waste heat power generation fails to work, the pipeline connected to the waste heat boiler is closed by the sealing member, and the bypass air duct is opened by the sealing member. At this time, the air intake of the high-temperature fan is provided by the bypass air duct. When the waste heat power generation works normally, the air volume at the outlet of the waste heat boiler enters the bypass air duct through the pipeline and the inclined air duct. At this time, the bypass air duct is sealed by the sealing member, so that the air volume can only be transmitted to the high-temperature fan along the bypass air duct. Therefore, the bypass air duct increases the air duct for the air intake of the high-temperature fan to facilitate the operation of the high-temperature fan; in addition, the inclined setting of the inclined air duct reduces the accumulation of materials in the inclined air duct and reduces the resistance of the air flow from the waste heat boiler to the high-temperature fan, so that the power consumption of the high-temperature fan is reduced.

[0009] Preferably, the inclined air duct and the pipeline at the outlet of the waste heat boiler are connected by a connecting member.

[0010] Preferably, the end of the inclined air duct close to the pipeline is provided with an arc-shaped pipe extending towards the pipeline. The connecting member includes a transition pipe located between the pipeline and the arc-shaped pipe. The outer walls of both ends of the transition pipe are attached to the inner walls of the arc-shaped pipe and the pipeline. Both ends of the arc-shaped pipe and the pipeline are provided with annular connecting rings distributed around the outer wall of the transition pipe. Screws connected to the inner wall of the arc-shaped pipe are threadedly connected to each of the connecting rings.

[0011] Preferably, the connecting ring is divided into several arc-shaped plates, and the screws are located on the arc-shaped plates. One side of each arc-shaped plate is welded to the side of the arc-shaped pipe or the pipeline respectively.

[0012] Preferably, several connecting plates are circumferentially arranged at the opposite ends of the arc-shaped pipe and the pipeline. The outer wall of the transition pipe is provided with mounting plates distributed opposite to the connecting plates. The mounting plates and the connecting plates are opposite and are both provided with mounting holes. Locking rods are inserted into the mounting holes of the connecting plates and the mounting plates. Both ends of the locking rods respectively penetrate out of the opposite sides of the mounting plates and the connecting plates, and locking blocks that are in contact with the mounting plates or the connecting plates are threadedly connected to the penetrated ends.

[0013] Preferably, the sealing member includes a driving plate welded to the outer walls of the bypass air duct and the pipeline. A sealing plate is inserted into the driving plate. Openings for inserting the sealing plate are formed on the outer walls of the bypass air duct and the pipeline. One end of the sealing plate extends out of the driving plate and a driving rod is provided at the extended end. The driving rod is distributed away from the outer wall of the bypass air duct or the arc-shaped pipe. An electric cylinder connected to one end of the driving rod and driving the sealing plate to seal the bypass air duct and the pipeline is provided on one side wall of the driving plate.

[0014] Preferably, sliding grooves for the side of the sealing plate to slide are formed on the inner walls of the bypass air duct and the pipeline.

[0015] The beneficial effects of the present utility model are as follows: When the waste heat power generation fails to work, the pipeline connected to the waste heat boiler is closed by the sealing member, and the bypass air duct is opened by the sealing member. At this time, the air intake of the high-temperature fan is provided by the bypass air duct. When the waste heat power generation works normally, the air volume at the outlet of the waste heat boiler enters the bypass air duct through the pipeline and the inclined air duct. At this time, the bypass air duct is sealed by the sealing member, so that the air volume can only be transmitted to the high-temperature fan along the bypass air duct. Therefore, the bypass air duct increases the air duct for supplying air to the high-temperature fan to facilitate the operation of the high-temperature fan; in addition, the inclined setting of the inclined air duct reduces the accumulation of materials in the inclined air duct and reduces the resistance of the air flow from the waste heat boiler to the high-temperature fan, so that the power consumption of the high-temperature fan is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. 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.

[0017] Figure 1 is a schematic structural diagram of this embodiment;

[0018] Figure 2 is Figure 1 an enlarged schematic structural diagram of part A in

[0019] Figure 3 is a schematic structural diagram of the body transition pipe of this embodiment;

[0020] Figure 4 is a schematic structural diagram of the electric cylinder of this embodiment.

[0021] Description of the reference numerals in the drawings:

[0022] In the figure: 1, bypass air duct; 11, inclined air duct; 12, pipeline; 13, arc-shaped pipe; 131, transition pipe; 132, connecting ring; 133, screw; 14, connecting plate; 15, mounting plate; 151, locking rod; 152, locking block; 16, driving plate; 161, sealing plate; 162, driving rod; 163, electric cylinder; 2, high-temperature fan. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] A structure of the air inlet pipe of a high-temperature fan, as shown in Figure 1 and Figure 2 and Figure 3 , includes a bypass air duct 1 and an inclined air duct 11 extending obliquely upward and communicating with the bypass air duct 1. The bypass air duct 1 is vertically distributed, and the high-temperature fan 2 is located at the lower end of the bypass air duct 1. The inclined air duct 11 is connected to the outlet of the waste heat boiler through a pipeline 12. Sealing members for closing the bypass air duct 1 and the pipeline 12 are provided on both the bypass air duct 1 and the pipeline 12. The height position of the sealing member of the bypass air duct 1 is higher than the height position where the inclined air duct 11 communicates with the bypass air duct 1. The included angle between the inclined air duct 11 and the bypass air duct 1 is 50±5°. The lower end of the bypass air duct 1 is connected to the air inlet of the high-temperature fan 2.

[0025] As shown in Figure 1 and Figure 2 and Figure 3 , when the waste heat power generation fails to work, the pipeline 12 communicating with the waste heat boiler is closed by the sealing member, and the bypass air duct 1 is opened by the sealing member. At this time, the air intake of the high-temperature fan 2 is provided by the bypass air duct 1. When the waste heat power generation works normally, the air volume at the outlet of the waste heat boiler enters the bypass air duct 1 through the pipeline 12 and the inclined air duct 11. At this time, the bypass air duct 1 is closed by the sealing member, so that the air volume can only be transmitted along the bypass air duct 1 to the high-temperature fan 2. Therefore, the bypass air duct 1 increases the air duct for supplying air to the high-temperature fan 2, which is beneficial to the operation of the high-temperature fan 2; in addition, the inclined setting of the inclined air duct 11 at 50±5° reduces the accumulation of materials in the inclined air duct 11 and reduces the resistance of the air flow from the waste heat boiler to the high-temperature fan 2 after the air outlet, so that the power consumption of the high-temperature fan 2 is reduced.

[0026] As shown in Figure 1 and Figure 2 and Figure 3 , the inclined air duct 11 and the pipeline 12 at the outlet of the waste heat boiler are connected through a connecting member.

[0027] As shown in Figure 1 and Figure 2 and Figure 3, one end of the inclined air duct 11 close to the pipe 12 is provided with an arc-shaped pipe 13 extending towards the pipe 12. The connecting piece includes a transition pipe 131 located between the pipe 12 and the arc-shaped pipe 13. The outer walls of both ends of the transition pipe 131 are attached to the inner walls of the arc-shaped pipe 13 and the pipe 12. Ring-shaped connecting rings 132 distributed around the outer wall of the transition pipe 131 are provided at opposite ends of the arc-shaped pipe 13 and the pipe 12. The lower end surface of the connecting ring 132 is attached to the outer wall of the transition pipe 131. Screws 133 connected to the inner wall of the arc-shaped pipe 13 are threadedly connected to each of the connecting rings 132. At this time, during installation, the transition pipe 131 is installed between the arc-shaped pipe 13 and the pipe 12, and the two ends of the transition pipe 131 are fixed to the arc-shaped pipe 13 and the pipe 12 respectively through the screws 133. At this time, the setting of the transition pipe 131 facilitates the connection between the arc-shaped pipe 13 and the pipe 12 and the installation of the connection between the arc-shaped pipe 13 and the pipe 12. The connecting ring 132 is divided into several arc-shaped plates, and the screws 133 are located on the arc-shaped plates. One side edge of each arc-shaped plate is welded to the side edge of the arc-shaped pipe 13 or the pipe 12 respectively.

[0028] As Figure 1 and Figure 2 and Figure 3 , several connecting plates 14 are circumferentially provided at opposite ends of the arc-shaped pipe 13 and the pipe 12. The plate surface of the connecting plate 14 is perpendicular to the axis of the arc-shaped pipe 13 or the pipe 12. Mounting plates 15 distributed opposite to the connecting plates 14 are provided on the outer wall of the transition pipe 131. The mounting plates 15 and the connecting plates 14 are opposite to each other and are both provided with mounting holes. Locking rods 151 are inserted through the mounting holes of the connecting plates 14 and the mounting plates 15. The two ends of the locking rod 151 respectively pass through the opposite sides of the mounting plate 15 and the connecting plate 14, and locking blocks 152 that abut against the mounting plate 15 or the connecting plate 14 are threadedly connected to the protruding ends. At this time, before installing the connecting ring 132, first make the mounting plates 15 on the transition pipe 131 face the connecting plates 14 on the arc-shaped pipe 13 and the pipe 12 respectively. At this time, install the locking rods 151 so that the locking blocks 152 fix the positions of the connecting plates 14 and the mounting plates 15, thereby preliminarily fixing the two ends of the transition pipe 131 to the arc-shaped pipe 13 or the pipe 12 respectively. Subsequently, weld the connecting ring 132 and install the screws 133.

[0029] As Figure 3 and Figure 4, the closure member includes a driving plate 16 welded to the outer walls of the bypass air duct 1 and the pipeline 12. A closing plate 161 is inserted through the driving plate 16. Openings for inserting the closing plate 161 are formed on the outer walls of the bypass air duct 1 and the pipeline 12. One end of the closing plate 161 extends out of the driving plate 16 and a driving rod 162 is provided at the extended end. The driving rod 162 is distributed away from the outer wall of the bypass air duct 1 or the arc-shaped pipe 13, and the driving rod 162 extends out of the side wall in the width direction of the driving plate 16. An electric cylinder 163 for connecting with one end of the driving rod 162 and driving the closing plate 161 to close the bypass air duct 1 and the pipeline 12 is provided on one side wall of the driving plate 16. At this time, the electric cylinder 163 is located on one side of the outer walls of the bypass air duct 1 and the pipeline 12, facilitating the movement of the driving rod 162. Sliding grooves for the side edges of the closing plate 161 to slide are formed on the inner walls of the bypass air duct 1 and the pipeline 12.

[0030] As Figure 3 and Figure 4 , the electric cylinder 163 drives the closing plate 161 to move, thereby facilitating the opening or closing of the bypass air duct 1 or the pipeline 12 by the closing plate 161, and the operation is simple.

[0031] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A high-temperature fan air inlet pipe structure, characterized in that: The invention comprises a bypass air duct (1), and an inclined air duct (11) connected to the bypass air duct (1) and extending obliquely upward, wherein the inclined air duct (11) is connected to the outlet of the waste heat boiler via a pipeline (12), and the bypass air duct (1) and the pipeline (12) are both provided with a closing member for closing the bypass air duct (1) and the pipeline (12), and the angle between the inclined air duct (11) and the bypass air duct (1) is 50±5°, and the lower end of the bypass air duct (1) is connected to the air inlet of a high-temperature fan (2).

2. A high temperature fan air inlet pipe structure as claimed in claim 1, characterized in that: The inclined air duct (11) is connected to the pipe (12) at the outlet of the waste heat boiler via a connecting piece.

3. A high temperature fan air inlet pipe structure as claimed in claim 2, characterized in that: One end of the inclined air duct (11) close to the pipeline (12) is provided as an arc-shaped pipe (13) extending in the direction of the pipeline (12); the connecting piece comprises a transition pipe (131) located between the pipeline (12) and the arc-shaped pipe (13); outer walls at both ends of the transition pipe (131) fit the inner walls of the arc-shaped pipe (13) and the pipeline (12); an annular connecting ring (132) distributed around the outer wall of the transition pipe (131) is provided at the opposite end of the arc-shaped pipe (13) and the pipeline (12); and each of the connecting rings (132) is threadedly connected with a screw (133) connected to the inner wall of the arc-shaped pipe (13).

4. A high temperature fan air inlet pipe structure as claimed in claim 3, characterized in that: The connecting ring (132) is divided into a plurality of arc-shaped plates, the screws (133) are located on the arc-shaped plates, and one side of each arc-shaped plate is respectively welded to a side of an arc-shaped tube (13) or a pipeline (12).

5. A high temperature fan air inlet pipe structure as claimed in claim 3 or 4, characterized in that: A plurality of connecting plates (14) are circumferentially arranged at one end of the arc-shaped tube (13) and the pipeline (12); a mounting plate (15) is arranged on the outer wall of the transition tube (131) and is arranged opposite to the connecting plate (14); the mounting plate (15) and the connecting plate (14) are opposite to each other and both have mounting holes; locking rods (151) are inserted through the mounting holes of the connecting plate (14) and the mounting plate (15); two ends of the locking rod (151) respectively pass through the opposite sides of the mounting plate (15) and the connecting plate (14); and a locking block (152) is threadedly connected at the end that passes through and contacts the mounting plate (15) or the connecting plate (14).

6. A high temperature fan air inlet pipe structure as claimed in claim 3, characterized in that: The closing member comprises a driving plate (16) welded to the outer wall of the bypass air duct (1) and the pipeline (12); a closing plate (161) is inserted into the driving plate (16); an opening for inserting the closing plate (161) is provided on the outer wall of the bypass air duct (1) and the pipeline (12); one end of the closing plate (161) extends out of the driving plate (16) and a driving rod (162) is provided at the extended end; the driving rod (162) is arranged away from the outer wall of the bypass air duct (1) or the arc-shaped pipe (13); and an electric cylinder (163) connected to one end of the driving rod (162) and driving the closing plate (161) to close the bypass air duct (1) and the pipeline (12) is provided on a side wall of the driving plate (16).

7. A high temperature fan air inlet pipe structure as claimed in claim 6, characterized in that: The inner walls of the bypass air duct (1) and the pipeline (12) are provided with sliding grooves for the side sliding of the closing plate (161).

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