Sealing detection device for heat exchanger

Abstract

The invention belongs to the technical field of detectors, and discloses a sealing detection device for a heat exchanger, which comprises a separation assembly and a finned tube, and also comprises a plugging assembly I and a plugging assembly II which are respectively arranged at two ends of the separation tube and are used for sealing the two ends of the separation tube; the separation assembly comprises an outer barrel set. According to the scheme, through cooperation of a separation sealing ring, a micro air pressure sensor, an outer cylinder set, an inner cylinder set and other structures, a second screw rod is rotated, so that a piston drives a second annular pressing plate on the inner cylinder set to move towards a close first annular pressing plate, and the separation sealing ring is extruded to abut against a finned tube; at the moment, the interior of the finned tube is divided into a plurality of air chambers by the separation sealing rings, so that the inner cylinder group is communicated with the outside, after three minutes, the value measured by the micro air pressure sensor in each air chamber changes, and a gap exists in the interval where the air chamber is located; therefore, the problem that the position of the crack of the heat exchange pipeline cannot be more accurately judged by the existing method is solved.

Description

Technical Field

[0001] This invention belongs to the field of detector technology, specifically a sealing detection device for heat exchangers. Background Technology

[0002] Finned tubes are the core component of heat exchangers. Their working principle involves adding fins to the outer surface of the tube, significantly increasing the heat exchange area. This allows for more efficient transfer of heat from the fluid inside the tube to the fins, which then disperse the heat into the external environment. Through heat conduction and convection, efficient heat transfer and dissipation are achieved. To ensure stable operation of the finned tubes, it is necessary to test the tube's seal. Existing technology involves sealing both ends of the heat exchange tube, injecting gas into it, and then monitoring the gas pressure after a period of time to determine if there are cracks causing gas leakage. However, cracks in heat exchange tubes are generally small. Therefore, when workers detect cracks using the above method, they cannot accurately pinpoint their location. Therefore, to solve this problem, a seal detection device for heat exchangers is proposed. Summary of the Invention

[0003] To address the problems mentioned in the background section, this invention provides a sealing detection device for heat exchangers, which solves the problem that existing methods cannot accurately determine the location of cracks in heat exchange pipes.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a sealing detection device for heat exchangers, comprising finned tubes, and further comprising: A separator assembly, which is placed inside the finned tube; Blocking assembly one and blocking assembly two are respectively installed at both ends of the partition tube; The separation assembly includes an outer cylinder assembly, a partition plate, and an inner cylinder assembly. The partition plate is equidistantly sleeved on the outer cylinder assembly. The partition plate consists of an annular pressure plate one and an annular pressure plate two, and a separation sealing ring disposed between the two. The inner cylinder assembly is movably sleeved inside the outer cylinder assembly. The annular pressure plate two is movably sleeved outside the outer cylinder assembly and has a spline-shaped inner wall. The spline penetrates the outer cylinder assembly and is fixedly connected to the inner cylinder assembly. The first sealing assembly includes a first sealing ring that abuts against one end of the finned tube. The first sealing ring is internally elastically connected to a circular sealing plate that is threaded to one end of the outer cylinder assembly. The circular sealing plate is threadedly connected to a second screw. One end of the second screw is movably connected to a piston that is threaded to one end of the inner cylinder assembly. The first sealing ring and the circular sealing plate are connected by a tension spring. The second sealing assembly includes a second sealing ring that abuts against the other end of the finned tube, and an elastic sealing ring that is elastically connected inside the second sealing ring and threadedly connected to the other end of the outer cylinder assembly.

[0005] Preferably, the outer cylinder assembly includes several adjacent independent outer cylinders, and each of the annular pressure plates is fixedly sleeved on one end of the independent outer cylinder, and the annular pressure plate can be connected to one end of the adjacent independent outer cylinder.

[0006] Preferably, the annular pressure plate near the annular sealing plate is threadedly connected to the annular sealing plate, and the independent outer cylinder near the elastic sealing ring is threadedly connected to the elastic sealing ring.

[0007] Preferably, the inner cylinder assembly comprises several adjacent independent inner cylinders connected by threads, and each independent inner cylinder has a straight groove.

[0008] Preferably, the independent inner cylinder near the piston is threadedly connected to the piston, and one end of the independent inner cylinder near the elastic sealing ring is threadedly connected to a connecting pipe for connection with a negative pressure pump.

[0009] Preferably, the maximum diameters of two adjacent annular pressure plates 1 and 2 are equal and smaller than the diameter of the inner wall of the finned tube, and a slope is provided on the opposite side of the two. A gap smaller than the cross-sectional diameter of the separator sealing ring is left between two adjacent annular pressure plates 1 and 2.

[0010] Preferably, the detection component includes a sealing bolt threaded onto the independent outer cylinder and passing through a straight slot and communicating with the independent inner cylinder. The bottom of the sealing bolt is provided with a one-way valve that flows into the independent inner cylinder, and a miniature air pressure sensor located above the one-way valve is fixedly connected inside the sealing bolt.

[0011] Preferably, the sealing ring one further includes a slanted locking block movably connected thereto; a screw threadedly connected to the sealing ring one; and a slanted groove formed on the circular sealing plate; The rotating screw drives the inclined block to move downward in the inclined groove and presses against the inner wall of the inclined groove, thereby causing the annular sealing plate to drive the screw, piston, inner cylinder assembly and outer cylinder assembly to move synchronously toward the annular sealing plate to adjust the position of the separating sealing ring.

[0012] Preferably, the bottom end of the inclined block is initially located at the top of the inclined groove; As the inclined block moves downwards and away from the sealing ring, the tension spring is stretched.

[0013] Preferably, when the outer cylinder assembly and the inner cylinder assembly move toward the circular sealing plate, the distance they move is greater than the diameter of the circular cross-section of a separating sealing ring. At the same time, when the outer cylinder assembly moves, it drives the elastic sealing ring to move, and the spring sleeved on the outside of the elastic sealing ring is compressed.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The above scheme, through the cooperation of structures such as the separating sealing ring, the miniature pressure sensor, the outer cylinder assembly, and the inner cylinder assembly, enables the device to detect the approximate range where the heat exchange tube crack exists. By rotating the second screw, the piston drives the second annular pressure plate on the inner cylinder assembly to move toward the nearby first annular pressure plate, and squeezes the separating sealing ring to abut against the finned tube. At this time, the separating sealing ring divides the inside of the finned tube into several air chambers. When the gas inside the inner cylinder assembly is drawn out by the negative pressure pump and each air chamber is in a negative pressure state, the inner cylinder assembly is connected to the outside. After waiting for three minutes, the value measured by the miniature pressure sensor in each air chamber changes, indicating that there is a gap in the range where the air chamber is located. The above scheme, through the cooperation of the screw one, the inclined block, the inclined groove, and the screw two, enables the device to avoid false detection of gaps. After the first test is completed, the screw two is rotated to restore the outer cylinder assembly and the annular pressure plate one to their initial state. Then, the screw one is rotated to make the bottom end of the inclined block move downward in the inclined groove, thereby forcing the annular sealing plate and the piston to move the outer cylinder assembly and the inner cylinder assembly toward the screw two, respectively. The moving distance exceeds the diameter of the circular cross-section of the dividing sealing ring. Then, the above operation is repeated to divide and test the internal space of the finned tube, thereby avoiding the situation where the dividing sealing ring blocks the gap and causes false detection of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front cross-sectional view of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle; Figure 5 for Figure 2 Enlarged view of point C in the middle; Figure 6 This is a schematic diagram of the structure of the separator component of the present invention; Figure 7 This is a schematic diagram of the independent outer cylinder and independent inner cylinder of the present invention; Figure 8 This is an exploded view of the detection component of the present invention; Figure 9 This is an exploded view of the sealing component one of the present invention; Figure 10 This is a schematic diagram of the structure of the inclined card block in this invention; Figure 11 This is an exploded view of the second sealing component of the present invention; Figure 12 This is a schematic diagram of the connecting pipe of the present invention.

[0016] In the diagram: 11. Outer cylinder assembly; 111. Independent outer cylinder; 12. Annular pressure plate one; 13. Inner cylinder assembly; 131. Independent inner cylinder; 1311. Straight groove; 14. Annular pressure plate two; 15. Separating sealing ring; 2. Sealing assembly one; 21. Sealing ring one; 211. Angled block; 212. Screw one; 213. Angled groove; 22. Circular sealing plate; 23. Screw two; 24. Piston; 25. Tension spring; 3. Sealing assembly two; 31. Sealing ring two; 32. Elastic sealing ring; 4. Detection assembly; 41. Sealing connecting bolt; 42. One-way valve; 43. Miniature air pressure sensor; 5. Connecting pipe; 6. Finned tube. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figures 1 to 12 As shown, the present invention provides a sealing detection device for heat exchangers, including a finned tube 6, and further including: a partition assembly placed inside the finned tube 6; a first sealing assembly 2 and a second sealing assembly 3, which are respectively installed at both ends of the partition tube; The partition assembly includes an outer cylinder assembly 11, a partition plate, and an inner cylinder assembly 13. The partition plate is equidistantly sleeved on the outer cylinder assembly 11. The partition plate is composed of an annular pressure plate 12 and an annular pressure plate 14 and a partition sealing ring 15 disposed between the two. The inner cylinder assembly 13 is movably sleeved inside the outer cylinder assembly 11. The annular pressure plate 14 is movably sleeved outside the outer cylinder assembly 11 and its inner wall is splined. The spline penetrates the outer cylinder assembly 11 and is fixedly connected to the inner cylinder assembly 13. The sealing assembly 2 includes a sealing ring 21 that abuts against one end of the finned tube 6. The sealing ring 21 is elastically connected to a circular sealing plate 22 that is threaded to one end of the outer cylinder assembly 11. A screw 23 is threaded to the circular sealing plate 22. One end of the screw 23 is movably connected to a piston 24 that is threaded to one end of the inner cylinder assembly 13. The sealing ring 21 and the circular sealing plate 22 are connected by a tension spring 25. The second sealing assembly 3 includes a second sealing ring 31 that abuts against the other end of the finned tube 6, and an elastic sealing ring 32 that is elastically connected inside the second sealing ring 31 and threadedly connected to the other end of the outer cylinder assembly 11. Rotating screw 23 pulls piston 24 and drives inner cylinder assembly 13 to move toward screw 23, causing annular pressure plate 14 to move toward adjacent annular pressure plate 12 and squeeze the separating sealing ring 15 to abut against the inner wall of finned tube 6, thus dividing the interior of finned tube 6 into several air chambers. Each air chamber is equipped with a detection component 4 that passes through outer cylinder assembly 11 and inner cylinder assembly 13. When the gas inside inner cylinder assembly 13 is drawn out by a negative pressure pump and each air chamber is in a negative pressure state, the inner cylinder assembly 13 is connected to the outside.

[0019] Using the above scheme, by rotating screw 23, piston 24 drives the annular pressure plate 14 on inner cylinder assembly 13 to move toward the nearby annular pressure plate 12, and squeezes the partition sealing ring 15 so that it moves up the slope and comes into contact with the finned tube 6. At this time, the partition sealing ring 15 divides the inside of the finned tube 6 into several air chambers. When the gas inside the inner cylinder assembly 13 is drawn out by the negative pressure pump so that each air chamber is in a negative pressure state, the inner cylinder assembly 13 is connected to the outside. After waiting for three minutes, the value measured by the miniature air pressure sensor 43 in each air chamber changes, and then the corresponding area of ​​the finned tube 6 corresponding to that air chamber has a crack. It is worth noting that when the finned tube 6 is under negative pressure, the sealing ring 31 and the sealing ring 21 will fit tightly against the ports at both ends of the finned tube 6 under the action of atmospheric pressure.

[0020] like Figure 1-7 As shown, the outer cylinder assembly 11 includes several adjacent independent outer cylinders 111, and each annular pressure plate 12 is fixedly sleeved on one end of the independent outer cylinder 111. The annular pressure plate 12 can be connected to one end of the adjacent independent outer cylinder 111. The annular pressure plate 12 near the annular sealing plate 22 is threadedly connected to the annular sealing plate 22, and one end of the independent outer cylinder 111 near the elastic sealing ring 32 is threadedly connected to the elastic sealing ring 32. The inner cylinder assembly 13 is composed of several adjacent independent inner cylinders 131 connected by threads, and each independent inner cylinder 131 is provided with a straight groove 1311. The independent inner cylinder 131 near the piston 24 is threadedly connected to the piston 24, and one end of the independent inner cylinder 131 near the elastic sealing ring 32 is threadedly connected to a connecting pipe 5 for connecting to the negative pressure pump.

[0021] By adopting the above scheme, the adjacent independent outer cylinder 111 and the adjacent independent inner cylinder 131 can be connected to each other, so that the device can be adjusted and assembled according to heat exchange tubes of different lengths, which is convenient for staff to use.

[0022] like Figure 3-4 and Figure 6-7As shown, the maximum diameters of two adjacent annular pressure plates 12 and 14 are equal and smaller than the diameter of the inner wall of the finned tube 6, and a slope is provided on the opposite side of the two. A gap smaller than the cross-sectional diameter of the separating sealing ring 15 is left between two adjacent annular pressure plates 12 and 14. By adopting the above scheme, the design of the ramps on the annular pressure plate 12 and the annular pressure plate 14 allows the annular pressure plate 14 to squeeze the expansion of the separating sealing ring 15 and separate the inner wall of the finned tube 6 when it moves toward the annular pressure plate 12. At the same time, the gap left between the annular pressure plate 12 and the annular pressure plate 14 can prevent the separating sealing ring 15 from getting stuck in the gap, thereby ensuring that the device can work stably.

[0023] like Figure 1-2 and Figure 4-8 As shown, the detection component 4 includes a sealing connection bolt 41 that is threaded onto the independent outer cylinder 111 and passes through the straight slot 1311 and communicates with the independent inner cylinder 131. A one-way valve 42 that flows into the independent inner cylinder 131 is provided at the bottom of the sealing connection bolt 41. A miniature air pressure sensor 43 located above the one-way valve 42 is fixedly connected inside the sealing connection bolt 41. By adopting the above solution and through the design of the straight groove 1311, the sealing bolt 41 is prevented from blocking the movement of the inner cylinder assembly 13 when it moves inside the outer cylinder assembly 11. Meanwhile, due to the design of the one-way valve 42, when the air chamber is under negative pressure, it ensures that external gas cannot enter the air chamber through the one-way valve 42, but can only enter the air chamber through the gap on the finned tube 6, thus making it easier for staff to determine the position range of the gap on the finned tube 6.

[0024] like Figure 1-3 and Figure 9-10 As shown, the sealing ring 21 also includes a slanted locking block 211 movably connected thereto; a screw 212 threadedly connected to the sealing ring 21; and a slanted groove 213 formed on the annular sealing plate 22. Rotating screw 212 drives inclined block 211 to descend in inclined groove 213 and presses the inner wall of inclined groove 213, thereby causing the annular sealing plate 22 to drive screw 23, piston 24, inner cylinder assembly 13 and outer cylinder assembly 11 to move synchronously toward the annular sealing plate 22 to adjust the position of the separating sealing ring 15. Using the above scheme, after the first test is completed, the screw 23 is rotated to restore the outer cylinder assembly 11 and the annular pressure plate 12 to their initial state. Then, the screw 212 is rotated to make the bottom end of the inclined block 211 move downward in the inclined groove 213, thereby forcing the annular sealing plate 22 and the piston 24 to move the outer cylinder assembly 11 and the inner cylinder assembly 13 as a whole toward the screw 23. The moving distance exceeds the diameter of the circular cross section of the partition sealing ring 15. Then, the above operation is repeated to partition and test the internal space of the finned tube 6, thereby avoiding the situation where the partition sealing ring 15 blocks the gap and causes the device to mistest.

[0025] like Figure 2-3 As shown, the bottom end of the inclined block 211 is initially located at the top of the inclined groove 213; When the inclined block 211 moves downwards and the inclined groove 213 moves away from the sealing ring 21, the tension spring 25 is stretched. When the outer cylinder assembly 11 and inner cylinder assembly 13 of the screw 212 move toward the annular sealing plate 22, the distance they move is greater than the diameter of the circular cross section of a separating sealing ring 15. At the same time, when the outer cylinder assembly 11 moves, it drives the elastic sealing ring 32 to move and compresses the spring sleeved on the outside of the elastic sealing ring 32. By adopting the above scheme, during the process of adjusting the position of the separating sealing ring 15, the tension spring 25 is stretched while the spring sleeved on the outside of the elastic sealing ring 32 is compressed, thereby ensuring that the sealing ring 21 and sealing ring 121 can always and respectively maintain contact with the two ends of the finned tube 6 during the adjustment of the separating sealing ring 15.

[0026] Working principle and usage process of this invention: First, connect the piston 24 and the annular sealing plate 22 to the inner cylinder assembly 13 and the outer cylinder assembly 11 respectively, and place the entire separator assembly inside the finned tube 6. Simultaneously, ensure one side of the sealing ring 21 abuts against one end of the finned tube 6. Then, connect the elastic sealing ring 32 to the other end of the outer cylinder assembly 11, and ensure one side of the sealing ring 31 abuts against the other end of the finned tube 6. Next, rotate the screw 23, causing the piston 24 to move the annular pressure plate 14 on the inner cylinder assembly 13 towards the adjacent annular pressure plate 12. The separation sealing ring 15 is squeezed to move up the slope and come into contact with the finned tube 6. At this time, the separation sealing ring 15 divides the inside of the finned tube 6 into several air chambers. When the gas inside the inner cylinder assembly 13 is drawn out by the negative pressure pump and each air chamber is in a negative pressure state, the inner cylinder assembly 13 is connected to the outside. After waiting for three minutes, the value measured by the miniature air pressure sensor 43 in each air chamber changes, indicating that there is a gap in the area where the air chamber is located. This allows the staff to accurately determine the location of the crack in the heat exchange pipe. After the first test is completed, rotate screw 23 to restore the outer cylinder assembly 11 and the annular pressure plate 12 to their initial state; Then, rotating screw 212 causes the bottom end of the inclined block 211 to move downward in the inclined groove 213, thereby forcing the annular sealing plate 22 and piston 24 to drive the outer cylinder assembly 11 and the inner cylinder assembly 13 to move toward screw 23 respectively, and the moving distance exceeds the distance of the circular cross-section diameter of the separating sealing ring 15. Then, the above operation is repeated to separate and inspect the internal space of the finned tube 6.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing detection device for a heat exchanger, comprising a finned tube (6), characterized in that, include: A separator assembly is placed inside the finned tube (6); Blocking component one (2) and blocking component two (3) are respectively installed at both ends of the partition tube; The separation assembly includes an outer cylinder assembly (11), a partition plate, and an inner cylinder assembly (13). The partition plate is equidistantly sleeved on the outer cylinder assembly (11). The partition plate is composed of an annular pressure plate one (12) and an annular pressure plate two (14) and a separation sealing ring (15) disposed between the two. The inner cylinder assembly (13) is movably sleeved inside the outer cylinder assembly (11). The annular pressure plate two (14) is movably sleeved outside the outer cylinder assembly (11) and its inner wall is splined. The spline penetrates the outer cylinder assembly (11) and is fixedly connected to the inner cylinder assembly (13). The sealing assembly 1 (2) includes a sealing ring 1 (21) that abuts against one end of the finned tube (6). The sealing ring 1 (21) is elastically connected to a circular sealing plate (22) that is threaded to one end of the outer cylinder assembly (11). A screw 2 (23) is threaded onto the circular sealing plate (22). A piston (24) that is threaded to one end of the screw 2 (23) is movably connected to one end of the inner cylinder assembly (13). The sealing ring 1 (21) and the circular sealing plate (22) are connected by a tension spring (25). The second sealing assembly (3) includes a second sealing ring (31) that abuts against the other end of the finned tube (6), and an elastic sealing ring (32) that is elastically connected inside the second sealing ring (31) and threadedly connected to the other end of the outer cylinder assembly (11).

2. The heat exchanger seal detection device according to claim 1, characterized in that: The outer cylinder assembly (11) includes several adjacent independent outer cylinders (111), and each of the annular pressure plates (12) is fixedly sleeved on one end of the independent outer cylinder (111). The annular pressure plates (12) can be connected to the other end of the adjacent independent outer cylinder (111).

3. The heat exchanger seal detection device according to claim 2, characterized in that: The annular pressure plate (12) near the annular sealing plate (22) is threadedly connected to the annular sealing plate (22), and one end of the independent outer cylinder (111) near the elastic sealing ring (32) is threadedly connected to the elastic sealing ring (32).

4. The heat exchanger seal detection device according to claim 1, characterized in that: The inner cylinder assembly (13) is formed by connecting several adjacent independent inner cylinders (131) by threads, and each independent inner cylinder (131) is provided with a straight groove (1311).

5. The heat exchanger seal detection device according to claim 4, characterized in that: The independent inner cylinder (131) near the piston (24) is threaded to the piston (24), and one end of the independent inner cylinder (131) near the elastic sealing ring (32) is threaded to a connecting pipe (5) for connecting to the negative pressure pump.

6. The heat exchanger seal detection device according to claim 1, characterized in that: The maximum diameters of two adjacent annular pressure plates (12) and (14) are equal and smaller than the diameter of the inner wall of the finned tube (6), and a slope is provided on the opposite side of the two. A gap smaller than the cross-sectional diameter of the separating sealing ring (15) is left between the two adjacent annular pressure plates (12) and (14).

7. The heat exchanger seal detection device according to claim 1, characterized in that: The detection component (4) includes a sealing connector (41) that is threaded onto the independent outer cylinder (111) and communicates with the independent inner cylinder (131) through the straight slot (1311). The bottom of the sealing connector (41) is provided with a one-way valve (42) that flows into the independent inner cylinder (131). A pressure sensor (43) located above the one-way valve (42) is fixedly connected inside the sealing connector (41).

8. The heat exchanger seal detection device according to claim 1, characterized in that: The sealing ring (21) also includes a movably connected inclined block (211); A screw rod (212) is threaded onto a sealing ring (21); An inclined groove (213) is formed on the annular sealing plate (22); The rotating screw (212) drives the inclined block (211) to move downward in the inclined groove (213) and press against the inner wall of the inclined groove (213).

9. The heat exchanger seal detection device according to claim 8, characterized in that: The bottom end of the inclined block (211) is initially located at the top of the inclined groove (213); When the inclined block (211) moves downwards and the inclined groove (213) moves away from the sealing ring (21), the tension spring (25) is stretched.

10. The heat exchanger seal detection device according to claim 9, characterized in that: When the outer cylinder assembly (11) and the inner cylinder assembly (13) move toward the circular sealing plate (22), the moving distance is greater than the diameter of the circular cross section of a separating sealing ring (15). At the same time, when the outer cylinder assembly (11) moves, it drives the elastic sealing ring (32) to move, and compresses the spring sleeved on the outside of the elastic sealing ring (32).

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