Tubular air preheater detection device

Abstract

The utility model relates to the technical field of air preheaters, and discloses a tubular air preheater detection device, which comprises a tubular air preheater body, a heat exchange tube is arranged on the tubular air preheater body, a rotating shaft is arranged on the outer surface of the heat exchange tube, a first lantern ring and two second lantern rings are rotatably sleeved on the outer surface of the rotating shaft, and the first lantern ring and the two second lantern rings are sleeved on the outer surface of the rotating shaft. A second sleeve is fixedly installed on the outer surface of the first sleeve ring, a first sleeve is fixedly installed on the outer surface of the second sleeve ring, a detection device is arranged in the first sleeve and the second sleeve, the detection device comprises two flexible films, the two flexible films are fixedly installed on the outer surfaces of the two sleeves, grooves are formed in the opposite faces of the two sleeves, and the two flexible films are fixedly installed in the grooves. According to the tubular air preheater detection device, air leakage detection can be carried out after the heat exchange tube is wrapped by the two sleeves, the air leakage condition of the heat exchange tube can be effectively observed through the expansion degree of the flexible film, and the tubular air preheater detection device is high in installation speed, convenient to disassemble and capable of rapidly carrying out detection.

Description

Technical Field

[0001] This utility model relates to the field of air preheater technology, specifically to a tubular air preheater testing device. Background Technology

[0002] An air preheater is a heat exchange surface in the boiler's tail flue where the flue gas is preheated to a certain temperature by internal heat exchange fins. It is a device used to improve the boiler's heat exchange performance and reduce energy consumption. Air preheaters are generally classified into three types: plate type, rotary type, and tubular type.

[0003] Because the amount of dust on the flue gas side of tubular air preheaters is generally large, the wear of the tubular air preheaters is relatively severe, which in turn leads to leaks. Currently, the air leakage rate of tubular air preheaters begins to rise about 60 days after maintenance, from about 8% at the beginning of maintenance to about 12%, and in severe cases it can reach more than 15%. In order to find the specific location of the air leakage in the tubular air preheater, it is necessary to conduct leakage tests on each heat exchange tube of the tubular air preheater. The current detection method is very rudimentary. Generally, the direction of the candle flame or incense is observed by lighting candles or incense sticks at the openings of each heat exchange tube to determine whether there is a leak. This method is easily affected by air disturbances, which can lead to detection failure and has poor detection accuracy. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a tubular air preheater detection device, which has advantages such as detecting air leaks in heat exchange tubes and solves the problem of inaccurate air leak detection in heat exchange tubes.

[0006] (II) Technical Solution

[0007] To achieve the above-mentioned purpose of detecting air leakage in heat exchange tubes, this utility model provides the following technical solution: a tubular air preheater detection device, including a tubular air preheater body, a heat exchange tube disposed on the tubular air preheater body, a rotating shaft disposed on the outer surface of the heat exchange tube, and a first collar and two second collars rotatably sleeved on the outer surface of the rotating shaft.

[0008] The first sleeve is fixedly installed on the outer surface of the first sleeve, the second sleeve is fixedly installed on the outer surface of the second sleeve, and a detection device is provided inside the first sleeve and the second sleeve.

[0009] Preferably, the detection device includes two flexible films, which are respectively fixedly installed on the outer surfaces of the first sleeve and the second sleeve. Grooves are provided on the opposite surfaces of the first sleeve and the second sleeve, and rubber sealing rings are fixedly installed on the inner walls of the grooves.

[0010] Preferably, a fixing plate is fixedly installed on the outer surface of both the first sleeve and the second sleeve, and a fixing post is fixedly installed on the opposite side of the two fixing plates, with a slot provided on the outer surface of the fixing post.

[0011] Preferably, slots are provided on the opposite sides of the two fixing plates, spring grooves are provided on the inner walls of the slots, and sliding holes are provided on the upper surface of the fixing plates.

[0012] Preferably, a fixing rod is slidably sleeved on the inner surface of the sliding hole, a spring is sleeved on the outer surface of the fixing rod, a locking block is fixedly installed at the lower end of the spring, and the right surface of the locking block is set as an inclined plane.

[0013] The locking block is fixedly installed at the lower end of the fixing rod, and a pull ring is fixedly installed at the upper end of the fixing rod.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a detection device for a tubular air preheater, which has the following advantages:

[0016] 1. This tubular air preheater detection device can detect air leakage by wrapping the heat exchange tubes with two sleeves. The degree of expansion of the flexible membrane can effectively observe the air leakage of the heat exchange tubes. It is quick to install and easy to disassemble, enabling rapid detection.

[0017] 2. This tubular air preheater testing device can improve the sealing during testing by using a rubber sealing ring, which can effectively improve the testing accuracy and make it more convenient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a tubular air preheater testing device according to the present invention;

[0019] Figure 2 This is a schematic diagram of the rotating shaft structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the first sleeve structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the second sleeve structure of this utility model;

[0022] Figure 5 This utility model Figure 4 Enlarged view of the structure at point A in the middle.

[0023] In the diagram: 1. Tubular air preheater body; 2. Heat exchange tube; 3. Rotating shaft; 4. First sleeve; 5. Second sleeve; 6. Flexible film; 7. Groove; 8. Rubber sealing ring; 9. Fixing plate; 10. Fixing column; 11. Slot; 12. First collar; 13. Second collar; 14. Slot; 15. Spring groove; 16. Sliding hole; 17. Fixing rod; 18. Spring; 19. Locking block; 20. Pull ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 This utility model provides a new technical solution: a tubular air preheater detection device, including a tubular air preheater body 1, a heat exchange tube 2 is provided on the tubular air preheater body 1, a rotating shaft 3 is provided on the outer surface of the heat exchange tube 2, and a first collar 12 and two second collars 13 are rotatably sleeved on the outer surface of the rotating shaft 3.

[0026] The outer surface of the first sleeve 12 is fixedly installed with the second sleeve 5, the outer surface of the second sleeve 13 is fixedly installed with the first sleeve 4, and the first sleeve 4 and the second sleeve 5 are equipped with detection devices.

[0027] Furthermore, the detection device includes two flexible films 6, which are respectively fixedly installed on the outer surfaces of the first sleeve 4 and the second sleeve 5. Grooves 7 are formed on the opposing surfaces of the first sleeve 4 and the second sleeve 5, and rubber sealing rings 8 are fixedly installed on the inner walls of the grooves 7. Fixing plates 9 are fixedly installed on the outer surfaces of the first sleeve 4 and the second sleeve 5. Fixing posts 10 are fixedly installed on the opposing surfaces of the two fixing plates 9. Slots 11 are formed on the outer surfaces of the fixing posts 10. Slots 14 are formed on the opposing surfaces of the two fixing plates 9. Spring grooves 15 are formed on the inner walls of the slots 14. A sliding hole 16 is formed on the upper surface of the fixing plate 9. A fixing rod 17 is slidably fitted onto the inner surface of the sliding hole 16. The outer surface of the fixing rod 17 is fitted with... A spring 18 is provided, and a locking block 19 is fixedly installed at the lower end of the spring 18. The right surface of the locking block 19 is inclined. The locking block 19 is fixedly installed at the lower end of the fixing rod 17, and a pull ring 20 is fixedly installed at the upper end of the fixing rod 17. When this tubular air preheater detection device is in use, the first sleeve 4 and the second sleeve 5 are positioned on both sides of the heat exchange tube. At this time, the first collar 12 and the second collar 13 rotate on the outer surface of the rotating shaft 3, causing the two sleeves to move closer together. At this time, the fixing post 10 set on the second sleeve 5 is inserted into the slot 14. Simultaneously, the fixing post 10 impacts the inclined surface of the locking block 19 and applies an upward pushing force to the locking block 19, causing the locking block 19 to move upward. At the same time, the locking block 19 is fixedly installed on the upper surface. Spring 18 applies an upward thrust, causing it to move upward. As it moves upward, spring 18 strikes the inner wall of spring groove 15, causing it to contract. Simultaneously, locking block 19 applies an upward thrust to fixing rod 17, causing it to slide upward in sliding hole 16. Meanwhile, fixing post 10 is continuously inserted into slot 14. At this point, locking block 19 passes through the slot 11 on the outer surface of fixing post 10. Locking block 19 is no longer subjected to the squeezing force of fixing post 10, and spring 18 is no longer under force. Spring 18 expands and applies a downward thrust to locking block 19, causing it to engage with the slot 11 on the outer surface of fixing post 10 for fixation. Installation is now complete. This can be observed... The expansion degree of the flexible membrane can detect air leakage. After the test is completed, by pulling the pull ring 20, the pull ring 20 moves the fixed rod 17 fixed at the lower end upward. The fixed rod 17 moves the locking block 19 fixed at the lower end upward, and the locking block 19 disengages from the locking groove 11. At this time, the fixing column 10 can be removed from the slot 14, and the disassembly is completed. This tubular air preheater detection device can detect air leakage by wrapping the heat exchange tube with two sleeves. The expansion degree of the flexible membrane can effectively observe the air leakage of the heat exchange tube. It is quick to install and easy to disassemble, and can quickly perform the test. In addition, the sealing condition during the test can be improved by the rubber sealing ring, which can effectively improve the detection accuracy.

[0028] Working principle: When using this tubular air preheater testing device, the first sleeve 4 and the second sleeve 5 are positioned on both sides of the heat exchange tube. The first ring 12 and the second ring 13 rotate on the outer surface of the rotating shaft 3, causing the two sleeves to move closer together. At this time, the fixing post 10 on the second sleeve 5 inserts into the slot 14. Simultaneously, the fixing post 10 impacts the inclined surface of the locking block 19, applying an upward thrust to the locking block 19, causing it to move upward. Simultaneously, the locking block 19 applies an upward thrust to the spring 18 fixedly mounted on its upper surface, causing the spring 18 to move upward. As the spring 18 moves upward, it impacts the inner wall of the spring groove 15, causing it to contract. At the same time, the locking block 19 applies an upward thrust to the fixing rod 17, causing it to slide upward in the sliding hole 16. Next, insert the fixing post 10 into the slot 14. At this time, the locking block 19 passes through the slot 11 opened on the outer surface of the fixing post 10. The locking block 19 is no longer subjected to the squeezing force applied by the fixing post 10, and the spring 18 is no longer under force. At this time, the spring 18 expands and applies a downward pushing force to the locking block 19 fixed at the lower end, so that it is locked into the slot 11 opened on the outer surface of the fixing post 10 for fixation. The installation is now complete. The degree of expansion of the flexible film can be observed to detect air leakage. After the detection is completed, pull the pull ring 20. The pull ring 20 drives the fixing rod 17 fixed at the lower end to move upward. The fixing rod 17 drives the locking block 19 fixed at the lower end to move upward. The locking block 19 disengages from the slot 11. At this time, the fixing post 10 can be removed from the slot 14, and the disassembly is completed.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A testing device for a tubular air preheater, comprising a tubular air preheater body (1), wherein heat exchange tubes (2) are disposed on the tubular air preheater body (1), characterized in that: The outer surface of the heat exchange tube (2) is provided with a rotating shaft (3), and the outer surface of the rotating shaft (3) is rotatably fitted with a first collar (12) and two second collars (13); The outer surface of the first sleeve (12) is fixedly installed with the second sleeve (5), the outer surface of the second sleeve (13) is fixedly installed with the first sleeve (4), and the first sleeve (4) and the second sleeve (5) are equipped with detection devices.

2. The tubular air preheater testing device according to claim 1, characterized in that: The detection device includes two flexible films (6), which are fixedly installed on the outer surfaces of the first sleeve (4) and the second sleeve (5). The opposite surfaces of the first sleeve (4) and the second sleeve (5) are provided with grooves (7), and the inner walls of the grooves (7) are fixedly installed with rubber sealing rings (8).

3. The tubular air preheater testing device according to claim 1, characterized in that: The outer surfaces of the first sleeve (4) and the second sleeve (5) are both fixedly mounted with fixing plates (9), and the opposite surfaces of the two fixing plates (9) are fixedly mounted with fixing posts (10), and the outer surface of the fixing posts (10) is provided with slots (11).

4. The tubular air preheater testing device according to claim 3, characterized in that: The two fixing plates (9) have slots (14) on their opposite sides, and spring grooves (15) are provided on the inner wall of the slots (14). The upper surface of the left fixing plate (9) has a sliding hole (16).

5. The tubular air preheater testing device according to claim 4, characterized in that: The inner surface of the sliding hole (16) is slidably fitted with a fixing rod (17), and the outer surface of the fixing rod (17) is fitted with a spring (18). The lower end of the spring (18) is fixedly installed with a locking block (19), and the right surface of the locking block (19) is set as an inclined plane. Among them, the locking block (19) is fixedly installed at the lower end of the fixing rod (17), and the upper end of the fixing rod (17) is fixedly installed with a pull ring (20).

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