Air leakage detection device for air pre-heater

Abstract

The utility model discloses an air leakage detection device for an air pre-heater, and relates to the technical field of air pre-heater detection. The left end of the air pre-heater pipe body is in sealed connection with a sealing head, the left end of the sealing head is connected with a pressure gauge, the outer side of the pressure gauge is connected with a pressure conveying pipe, the outer side of the pressure conveying pipe is connected with a pressure conveying mechanism, the pressure conveying mechanism comprises a sealing pipe, a sealing gasket is arranged in the sealing pipe, the right end of the sealing gasket is connected with a moving mechanism, and the outer side of the sealing pipe is connected with an air pressure box. A first sealing sleeve is arranged on the outer side of the sealing head, and a second sealing sleeve is arranged on the outer side of the sealing plug. Air pressure in the sealing pipe is transmitted into the air pre-heater pipe body through the pressure transmission pipe by pushing the sealing gasket, then air leaks from the leaking hole of the air pre-heater pipe body, and due to the fact that the inner side of the first sealing sleeve and the inner side of the second sealing sleeve are attached to the air pre-heater pipe body in a sealed mode, air leakage can be avoided when air leaks. The first sealing sleeve and the second sealing sleeve can bulge, and air leakage positions can be checked through the bulge of the first sealing sleeve.

Description

Technical Field

[0001] This utility model relates to the field of air preheater detection technology, specifically to an air preheater leakage detection device. Background Technology

[0002] Air preheater leakage detection devices are used to detect air leakage in air preheaters. Common detection devices include those based on differential pressure temperature method and sound frequency method to detect air preheater leakage. However, existing air preheater leakage detection devices have some shortcomings, such as:

[0003] Application No. CN202322067573.3 describes an air preheater leak detection device. This device can quickly and accurately detect leaking pipes in the air preheater and pipes with severely corroded and worn pipe walls that are about to leak, providing an effective reference for judging the operating status of the air preheater pipes. However, in actual use, this device is difficult to mark the leak points, which may lead to difficulty in accurately detecting the location of air preheater leaks during leak detection.

[0004] Therefore, we propose an air leakage detection device for air preheaters to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a leakage detection device for air preheaters, so as to solve the problem mentioned in the background art that the current air preheater leakage detection devices on the market may have difficulty in accurately detecting the leakage location of the air preheater during leakage detection.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a leakage detection device for an air preheater, comprising an air preheater tube body and a sealing plug disposed at the right end of the air preheater tube body, wherein a connector is disposed on the outer side of the air preheater tube body;

[0007] The air preheater tube body has a sealing head connected to the left end, and a pressure gauge is connected to the left end of the sealing head. A pressure transmission pipe is connected to the outside of the pressure gauge. The outside of the pressure transmission pipe is connected to the pressure transmission mechanism. The pressure transmission mechanism includes a sealing tube and a sealing gasket is provided inside the sealing tube. A moving mechanism is connected to the right end of the sealing gasket, and a pressure box is connected to the outside of the sealing tube.

[0008] A first sealing sleeve is provided on the outside of the sealing head, and a second sealing sleeve is provided on the outside of the sealing plug, and the outer sides of the first and second sealing sleeves are sealed and fitted to the air preheater tube body.

[0009] By pushing the sealing gasket, the air pressure inside the sealing tube is transmitted through the pressure transmission pipe to the air preheater tube body. This causes a change in the air pressure inside the air preheater tube body, resulting in air leakage at the leak point. Because the inner sides of the first and second sealing sleeves are tightly sealed to the air preheater tube body, the first and second sealing sleeves bulge when air leaks. This allows the user to locate the leak by checking the bulge of the first sealing sleeve, making it more convenient to detect leaks in the air preheater tube body.

[0010] As a preferred technical solution of this utility model, the air preheater tube body is sealed and fitted to the sealing head, and a fixing plate is connected to the bottom of the sealing head, and the fixing plate supports and fixes the sealing head.

[0011] The above technical solution enables the sealing head and air preheater tube body to be more stable when they are limited and fixed, thereby increasing the robustness of the equipment during operation.

[0012] As a preferred technical solution of this utility model, the top of the fixed plate is fixedly connected to the moving mechanism, and the moving mechanism includes a drive motor, and the left end of the drive motor is connected to a threaded shaft. The threaded shaft is provided with a grooved rod on the outside, and the outside of the grooved rod is slidably connected to the sealing tube.

[0013] The above technical solution enables the moving mechanism to be more stable when pushing the sealing gasket, thereby increasing the stability of the equipment when transmitting air pressure into the air preheater tube body.

[0014] As a preferred technical solution of this utility model, the grooved rod is fixedly connected to the sealing gasket, and the grooved rod can push the sealing gasket, and the sealing tube is fixedly connected to the pressure box through the solenoid valve.

[0015] The above technical solution enables the grooved rod to move more stably, thereby avoiding the problem of the grooved rod shifting or rotating during movement.

[0016] As a preferred technical solution of this utility model, a protective box is provided on the outside of the sealing tube for protection, and a pressure sensor is provided on the left end of the sealing plug. The pressure sensor is located inside the air preheater tube body. The outside of the sealing plug is fixedly connected to the second sealing sleeve, and a connecting pad is provided on the outside of the second sealing sleeve. The second sealing sleeve is fixedly connected to the first sealing sleeve through the connecting pad.

[0017] The above technical solution enables the first and second sealing sleeves to be connected to each other when they are fitted and sealed with the air preheater tube body, thereby increasing the stability of the first and second sealing sleeves when they are fixed.

[0018] As a preferred technical solution of this utility model, a sliding seat is provided on the outside of the sealing plug, and a fixing bolt is provided at the bottom of the sliding seat, and a sliding groove is provided on the top of the fixing plate, wherein the sliding seat and the sliding groove are slidably connected.

[0019] The above technical solution enables the sealing plug to be more stable when sealing and fitting with air preheater tube bodies of different lengths, thereby increasing the stability of the equipment during operation.

[0020] As a preferred technical solution of this utility model, a sealing groove is provided on the outside of the sealing plug, and the sealing groove can be sealed and fixed with the right end of the air preheater tube body.

[0021] The above technical solution enables the sealing plug to be more stable when it is sealed to the air preheater tube body, thereby increasing the firmness of the sealing plug when it is connected to the air preheater tube body.

[0022] Compared with the prior art, the beneficial effects of this utility model are: by pushing the sealing gasket, the air pressure inside the sealing tube is transmitted to the air preheater tube body through the pressure transmission tube, which can change the air pressure inside the air preheater tube body. Subsequently, air will leak at the leakage hole of the air preheater tube body. Since the inner sides of the first sealing sleeve and the second sealing sleeve are sealed and fitted to the air preheater tube body, the first sealing sleeve and the second sealing sleeve will bulge when the gas leaks. This allows the user to check the leakage location through the bulge of the first sealing sleeve, making it more convenient for the device to detect air leakage in the air preheater tube body.

[0023] Furthermore, the moving mechanism makes the movement more stable when pushing the sealing gasket, thereby increasing the stability of the device when transmitting air pressure into the air preheater tube body.

[0024] Furthermore, the sliding seat and groove design enable the sealing plug to be more stable when sealing and fitting with air preheater tubes of different lengths, thereby increasing the stability of the equipment during operation. Attached Figure Description

[0025] Figure 1 This is a front view of the structure of this utility model;

[0026] Figure 2 This is a three-dimensional structural schematic diagram of the front cross-section of this utility model;

[0027] Figure 3 This is a three-dimensional structural schematic diagram of the present invention from a top cross-section.

[0028] Figure 4 This is a three-dimensional structural diagram of the moving mechanism of this utility model;

[0029] Figure 5 This is a three-dimensional structural diagram of the sealing plug of this utility model;

[0030] Figure 6 This is a three-dimensional structural diagram of the sealing plug of Embodiment 2 of this utility model.

[0031] In the diagram: 1. Air preheater pipe body; 2. Connector; 3. Sealing head; 4. First sealing sleeve; 5. Pressure gauge; 6. Pressure delivery pipe; 7. Drive motor; 8. Threaded shaft; 9. Groove rod; 10. Sealing gasket; 11. Sealing pipe; 12. Pressure box; 13. Fixing plate; 14. Sealing plug; 15. Pressure sensor; 16. Second sealing sleeve; 17. Sliding seat; 18. Slide groove; 19. Connecting gasket; 20. Sealing groove. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0033] Example 1: To address the problem in existing air preheater leakage detection devices that struggle to mark leak points, potentially hindering accurate leak detection, the following solution is disclosed. Please refer to [link / reference]. Figures 1-5 This utility model provides a technical solution: an air preheater leakage detection device, including an air preheater tube body 1 and a sealing plug 14 provided at the right end of the air preheater tube body 1, and a connector 2 is provided on the outside of the air preheater tube body 1.

[0034] The air preheater tube body 1 is sealed with a sealing head 3 at the left end, and a pressure gauge 5 is connected to the left end of the sealing head 3. A pressure transmission pipe 6 is connected to the outside of the pressure gauge 5. The pressure transmission pipe 6 is connected to a pressure transmission mechanism on the outside. The pressure transmission mechanism includes a sealing pipe 11, and a sealing gasket 10 is provided inside the sealing pipe 11. A moving mechanism is connected to the right end of the sealing gasket 10, and a pressure box 12 is connected to the outside of the sealing pipe 11.

[0035] A first sealing sleeve 4 is provided on the outside of the sealing head 3, and a second sealing sleeve 16 is provided on the outside of the sealing plug 14, and the outer sides of the first sealing sleeve 4 and the second sealing sleeve 16 are sealed and fitted to the air preheater tube body 1.

[0036] The air preheater tube body 1 is sealed and fitted to the sealing head 3, and a fixing plate 13 is connected to the bottom of the sealing head 3, and the fixing plate 13 supports and fixes the sealing head 3.

[0037] The top of the fixed plate 13 is fixedly connected to the moving mechanism, and the moving mechanism includes a drive motor 7. The left end of the drive motor 7 is connected to a threaded shaft 8. The threaded shaft 8 is provided with a grooved rod 9 on the outside, and the grooved rod 9 is slidably connected to the sealing tube 11. The grooved rod 9 is fixedly connected to the sealing gasket 10, and the grooved rod 9 can push the sealing gasket 10. The sealing tube 11 is fixedly connected to the pressure box 12 through a solenoid valve.

[0038] The sealing tube 11 is protected by a protective box, and the left end of the sealing plug 14 is provided with a pressure sensor 15, which is located inside the air preheater tube body 1. The outer side of the sealing plug 14 is fixedly connected to the second sealing sleeve 16, and the outer side of the second sealing sleeve 16 is provided with a connecting pad 19. The second sealing sleeve 16 is fixedly connected to the first sealing sleeve 4 through the connecting pad 19. The outer side of the sealing plug 14 is provided with a sliding seat 17, and the bottom of the sliding seat 17 is provided with a fixing bolt. The top of the fixing plate 13 is provided with a sliding groove 18, and the sliding seat 17 is slidably connected to the sliding groove 18.

[0039] Example 2: This example discloses another method of sealing the air preheater tube body 1 with the sealing plug 14, which differs from Example 1. Specifically, as follows... Figure 6 As shown, the difference between this embodiment and embodiment 1 is that: the sealing plug 14 is provided with a sealing groove 20 on the outside, and the sealing groove 20 can be sealed and fixed with the right end of the air preheater tube body 1, so that the sealing plug 14 can be more firmly sealed and connected with the right end of the air preheater tube body 1, thereby increasing the stability of the equipment during installation.

[0040] Working principle: When using the air preheater leakage detection device, first connect the equipment power supply and the power grid to supply power. Then, the moving mechanism pushes the sealing gasket 10, so that the sealing gasket 10 transmits the air pressure inside the sealing tube 11 through the pressure transmission pipe 6 and the sealing head 3 to the air preheater tube body 1. When there is air leakage inside the air preheater tube body 1, the air leakage hole at the first sealing sleeve 4 or the second sealing sleeve 16 will bulge, so that the user can detect the air leakage hole of the air preheater tube body 1 through the protrusion. The pressure gauge 5 will record the total pressure transmitted to the air preheater tube body 1 by the pressure transmission pipe 6.

[0041] When the moving mechanism is running, the drive motor 7 will drive the threaded shaft 8 to rotate, which will cause the threaded shaft 8 to move the convex rod 9, which will cause the convex rod 9 to move the sealing gasket 10 inside the sealing tube 11. When the air pressure inside the sealing tube 11 is insufficient, the solenoid valve can be activated to transfer the air pressure inside the pressure box 12 to the inside of the sealing tube 11. Furthermore, by setting a pressure sensor 15 at the left end of the sealing plug 14, the pressure sensor 15 can detect the pressure inside the air preheater tube body 1.

[0042] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An air preheater leakage detection device, comprising an air preheater tube body (1) and a sealing plug (14) provided at the right end of the air preheater tube body (1), wherein a connector (2) is provided on the outside of the air preheater tube body (1). Its features are: The air preheater tube body (1) is sealed with a sealing head (3) at the left end, and a pressure gauge (5) is connected to the left end of the sealing head (3). A pressure transmission pipe (6) is connected to the outside of the pressure gauge (5). The outside of the pressure transmission pipe (6) is connected to the pressure transmission mechanism. The pressure transmission mechanism includes a sealing pipe (11). A sealing gasket (10) is provided inside the sealing pipe (11). A moving mechanism is connected to the right end of the sealing gasket (10). A pressure box (12) is connected to the outside of the sealing pipe (11). The sealing head (3) is provided with a first sealing sleeve (4) on the outside, and the sealing plug (14) is provided with a second sealing sleeve (16) on the outside, and the outer sides of the first sealing sleeve (4) and the second sealing sleeve (16) are sealed and fitted with the air preheater tube body (1).

2. The air leakage detection device for an air preheater according to claim 1, characterized in that, The air preheater tube body (1) is sealed and fitted to the sealing head (3), and a fixing plate (13) is connected to the bottom of the sealing head (3), and the fixing plate (13) supports and fixes the sealing head (3).

3. The air leakage detection device for an air preheater according to claim 2, characterized in that, The top of the fixed plate (13) is fixedly connected to the moving mechanism, and the moving mechanism includes a drive motor (7), and the left end of the drive motor (7) is connected to a threaded shaft (8). The threaded shaft (8) is provided with a grooved rod (9) on the outside, and the grooved rod (9) is slidably connected to the sealing tube (11) on the outside.

4. The air leakage detection device for an air preheater according to claim 3, characterized in that, The grooved rod (9) is fixedly connected to the sealing gasket (10), and the grooved rod (9) can push the sealing gasket (10), and the sealing tube (11) is fixedly connected to the pressure box (12) through the solenoid valve.

5. The air leakage detection device for an air preheater according to claim 4, characterized in that, The sealing tube (11) is protected by a protective box on the outside, and the sealing plug (14) is provided with a pressure sensor (15) on the left end. The pressure sensor (15) is located inside the air preheater tube body (1). The sealing plug (14) is fixedly connected to the second sealing sleeve (16) on the outside, and the second sealing sleeve (16) is provided with a connecting pad (19) on the outside. The second sealing sleeve (16) is fixedly connected to the first sealing sleeve (4) through the connecting pad (19).

6. The air leakage detection device for an air preheater according to claim 5, characterized in that, The sealing plug (14) is provided with a sliding seat (17) on the outside, and a fixing bolt is provided at the bottom of the sliding seat (17), and a groove (18) is provided at the top of the fixing plate (13). The sliding seat (17) and the groove (18) are slidably connected.

7. The air leakage detection device for an air preheater according to claim 6, characterized in that, The sealing plug (14) has a sealing groove (20) on its outer side, and the sealing groove (20) can be sealed and fixed to the right end of the air preheater tube body (1).

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