A heat exchanger tube bundle sealing plug

Abstract

The present invention relates to the technical field of heat exchangers, and in particular to a heat exchanger tube bundle sealing plug, comprising: a sealing head, which is used to seal the tube bundle of the heat exchanger, the sealing head is a hemispherical structure, the sealing head comprises a straight portion and an adjusting portion, the straight portion is used to contact the inner wall of the tube bundle, the straight portion and the adjusting portion are fixedly connected, the sealing head is made of elastic material, and the adjusting portion makes the straight portion fit the inner wall of the tube bundle; an adjusting component, which is used to control the spacing between the straight portions of the sealing head, the adjusting component and the sealing head are fixedly connected; and a stirring component, which is used to provide power for the fluid in the tube bundle, the stirring component is installed on the sealing head, the hemispherical structure adopted by the sealing head has sufficient elasticity to release the stress of a traditional plug, and will not cause cracks or damage due to the force generated by temperature changes after welding or plugging.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, in particular to a heat exchanger tube bundle sealing plug. Background Art

[0002] In a shell-and-tube heat exchanger, multiple circular heat exchange tube bundles are fixed and sealed on the tube sheets at both ends. Two fluids at different temperatures exchange heat between the heat exchange tubes to reach the required temperature. During the operation of the heat exchanger, the heat exchange tubes are susceptible to corrosion by different fluids and mechanical damage during cleaning and maintenance, and some heat exchange tubes may even leak. When it is inconvenient for the user to replace the heat exchange tubes due to some factors, the heat exchange area can be reduced by sealing both ends of the heat exchange tubes to maintain the normal operation of the heat exchanger. In this process, plugs are used to seal the heat exchange tubes.

[0003] Commercially available plugs are generally conical, copper or iron. The processing technology requirements for this type of plug are relatively high, and both the material cost and the processing cost are very expensive. The plugs are placed at the ends of the leaking heat exchange tubes, and then forced in or welded by external force. After both sides are blocked, the leaking tube bundle will no longer work. However, the residual stress generated by welding or interference fit will cause leakage of the surrounding heat exchange tubes or damage to the mother material of the pipeline. However, this type of plug is not easy to remove due to the need to replace the tube bundle in the later stage, which brings unnecessary trouble to the later tube replacement work. Even if every effort is made to remove it, it will cause varying degrees of damage to the plug, and most of them cannot be reused, resulting in a great waste of resources. There is also the possibility that fluid will enter the blocked tube bundle and form a dead water area after filling, resulting in low local stability of the external fluid.

[0004] In addition, when a heat exchange tube is damaged, after plugging both ends of the heat exchange tube with plugs, the heat exchange tube is actually changed from the tube side to the shell side, and the liquid inside it becomes a dead corner for heat exchange, thereby wasting the heat exchange area.

[0005] Therefore, the present invention provides a plug for sealing a tube bundle of a circular heat exchange tube of a heat exchanger to solve the above problem. Summary of the invention

[0006] The technical problem to be solved by the present invention is: in order to overcome the problem that the residual stress generated by welding or interference fit of the tube bundle plug in the prior art may cause leakage of the surrounding heat exchange tubes or damage to the pipeline base material, but such plug is difficult to remove due to the need to replace the tube bundle in the later stage, a heat exchanger tube bundle sealing plug is provided.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a heat exchanger tube bundle sealing plug, comprising:

[0008] The sealing head is used to seal the tube bundle of the heat exchanger. The sealing head has a hemispherical structure and includes a straight portion and an adjusting portion. The straight portion is used to contact the inner wall of the tube bundle. The straight portion and the adjusting portion are fixedly connected. The sealing head is made of elastic material. The adjusting portion allows the straight portion to fit the inner wall of the tube bundle.

[0009] An adjustment assembly, which is used to control the spacing between the straight portions of the sealing head, and the adjustment assembly is arranged in the sealing head;

[0010] And a stirring assembly, which is used to provide power for the fluid in the tube bundle. The stirring assembly is installed on the sealing head. The hemispherical structure of the sealing head has sufficient elasticity to release the stress of the traditional plug, and will not cause cracks or damage due to the force generated by temperature changes after welding or plugging;

[0011] Through the design of the stirring component, a vortex is formed in the heat exchange area within the tube bundle, and new fluid is continuously replaced, so that the closed tube bundle can be utilized to avoid a decrease in heat exchange efficiency.

[0012] In order to solve the problem of low contact between the straight portion and the inner wall of the tube bundle, a protruding ring is further formed on one side of the straight portion close to the inner wall of the tube bundle, and the protruding ring is used to contact the inner wall of the tube bundle.

[0013] The adjusting portion further includes gradually shrinking from the head end to the tail end toward the center and completing the closure;

[0014] The adjusting assembly includes a sleeve, an adjusting nut and an adjusting plate. The sleeve is fixedly connected to the sealing head. The outer wall of the sleeve has an external thread matching the internal thread on the adjusting nut. The adjusting nut is threadedly connected to the sleeve, the adjusting plate is fixedly connected to the adjusting nut, and the outer ring of the adjusting plate is in contact with the adjusting part.

[0015] In order to solve the problem that the adjustment plate is not smooth during movement, the outer ring of the adjustment plate is further provided with an arc angle.

[0016] It further includes a sealing head that separates the space in the tube bundle into a heat exchange area and a medium area;

[0017] The stirring assembly includes a driving member, a connecting shaft, a permanent magnet, a mounting plate and a stirring magnetic pole, the connecting shaft passes through a sleeve, and the connecting shaft and the sleeve are rotatably connected, the output shaft of the driving member is transmission-connected to the input end of the connecting shaft, the output end of the connecting shaft is fixedly connected to the permanent magnet, and the driving member, the connecting shaft and the permanent magnet are located on one side of the medium area;

[0018] The mounting plate and the stirring magnetic pole are located on one side of the heat exchange zone, the mounting plate and the sealing head are fixedly connected, the stirring magnetic pole is arranged on the side of the mounting plate away from the sealing head, and the stirring magnetic pole is attached to the mounting plate through the magnetic force of the permanent magnet.

[0019] In order to solve the problem of accidental falling off of the stirring pole, the stirring assembly further includes a cover shell with a plurality of through holes, the cover shell and the mounting plate are fixedly connected, the cover shell and the mounting plate enclose a stirring zone, and the stirring pole is located in the stirring zone.

[0020] The invention further comprises through holes of the cover shell arranged at intervals along the circumference thereof, and the through holes are arranged in an inclined manner, and the inclination direction of the through holes is the same as the rotation direction of the stirring magnetic pole.

[0021] It further includes that the driving member is an impeller or a motor.

[0022] It further includes a stirring pole and a mounting plate that are rotatably connected.

[0023] The beneficial effects of the present invention are as follows: the present invention provides a heat exchanger tube bundle sealing plug, the sealing head adopts a hemispherical structure with sufficient elasticity to release the stress of the traditional plug, and will not cause cracks or damage due to the force generated by temperature changes after welding or plugging;

[0024] The heat exchanger tube bundle sealing plug of the present application can be used to seal the tube bundle, cut off the leaking part, and block the entire tube bundle without heat exchange medium flowing inside;

[0025] Through the design of the stirring assembly, a vortex is formed in the heat exchange area in the tube bundle, so that the temperature of the fluid in the damaged tube bundle is uniform and the temperature of the fluid in the shell side is more uniform, thereby improving the heat exchange efficiency and avoiding the phenomenon of local low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 is a structural schematic diagram of another embodiment of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the sealing plug of the present invention installed in a heat exchanger;

[0030] Figure 4 The present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0031] Figure 5 It is a schematic diagram of the structure of the off-axis arrangement of the driving parts of the present invention.

[0032] In the figure: 1, sealing head, 11, straight portion, 12, adjustment portion, 13, raised ring;

[0033] 2. adjusting assembly, 21. sleeve, 22. adjusting nut, 23. adjusting plate, 231. arc angle;

[0034] 3. stirring assembly, 31. driving member, 32. connecting shaft, 33. permanent magnet, 34. mounting plate, 35. stirring magnetic pole;

[0035] 4. tube bundle, 41. heat exchange zone, 42. medium zone;

[0036] 5. Heat exchanger. DETAILED DESCRIPTION

[0037] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention. Embodiment 1:

[0038] like Figure 1 It is a structural schematic diagram of the present invention, a heat exchanger tube bundle sealing plug, comprising:

[0039] The sealing head 1 is used to seal the tube bundle 4 of the heat exchanger 5. The sealing head 1 has a hemispherical structure. The sealing head 1 includes a straight portion 11 and an adjusting portion 12. The straight portion 11 is a hollow column or an annular structure as a whole. The adjusting portion 12 has a hemispherical structure, and can be further in the shape of a semi-rugby ball. The inside of the adjusting portion 12 specifically provides a space for the adjusting plate 23 to move. The straight portion 11 is used to contact the inner wall of the tube bundle 4. The straight portion 11 and the adjusting portion 12 are fixedly connected. The sealing head 1 is made of elastic material. The adjusting portion 12 makes the straight portion 11 fit the inner wall of the tube bundle 4. A raised ring 13 is formed on one side of the straight portion 11 close to the inner wall of the tube bundle 4. The raised ring 13 is used to contact the inner wall of the tube bundle 4. Furthermore, the adjusting portion 12 has elastic tension. When the sealing head 1 is in the tube bundle 4, the adjusting portion 12 is in a compressed state. The elastic tension of the adjusting portion 12 makes the straight portion 11 fit the inner wall of the tube bundle 4.

[0040] The raised ring 13 can be close to the inner wall of the sealed tube bundle 4, and the hemispherical structure adopted by the sealing head 1 has sufficient elasticity to release the stress of the traditional plug, and will not cause cracks or breakage due to the force generated by temperature changes after welding or plugging.

[0041] The sealing head 1 is made of a steel material with strong elasticity, such as spring steel, stainless steel strip and other steel materials, and can also be made of rubber and other materials.

[0042] The regulating portion 12 gradually shrinks toward the center from its head end to its tail end and completes closing to form a hemispherical structure.

[0043] The heat exchanger tube bundle sealing plug of the present application can seal the inside of the tube bundle 4, can isolate the leaking part, and block the entire tube bundle to prevent the heat exchange medium from entering.

[0044] like Figure 1 As shown, the adjustment component 2 is used to control the spacing between the straight portions 11 of the sealing head 1, and the adjustment component 2 is arranged in the sealing head 1; the adjustment component 2 includes a sleeve 21, an adjustment nut 22 and an adjustment plate 23, the sleeve 21 is fixedly connected to the sealing head 1, the outer wall surface of the sleeve 21 has an external thread matching the internal thread on the adjustment nut 22, the adjustment nut 22 is threadedly connected to the sleeve 21, and the adjustment plate 23 is connected to the adjustment nut 22, the adjustment plate 23 and the adjustment nut 22 can be fixedly connected (welded, fixed with threaded connectors), and the adjustment plate 23 and the adjustment nut 22 can also be rotated. (slider slide groove structure, rotating element) connection mode, the outer ring of the adjustment plate 23 is in contact with the adjustment part 12, and the outer ring of the adjustment plate 23 has an arc angle 231, so that it contacts the inner wall of the adjustment part 12 more smoothly, and it is easier to make the straight part 11 expand as a whole to fit the inner wall. On the one hand, the adjustment component 2 is used to control the expansion of the straight part 11, and on the other hand, it can also make the straight part 11 fit the inner wall of the tube bundle 4, further increase the sealing performance, ensure the sealing effect, and also increase the friction between the sealing head 1 and the tube bundle 4, so that the sealing head 1 is close to the inner wall of the tube bundle 4 to avoid displacement under the impact force of the fluid.

[0045] The sealing head 1 divides the space in the tube bundle 4 into a heat exchange area 41 and a medium area 42 .

[0046] like Figure 1 As shown, the stirring assembly 3 is used to provide power for the fluid in the tube bundle 4, and is used to stir the fluid in the tube bundle 4 after plugging is completed, so that the temperature distribution inside the tube bundle 4 is uniform (such as Figure 3 As shown), the heat exchange is uniform and local cooling is avoided. The stirring assembly 3 is installed on the sealing head 1.

[0047] The stirring assembly 3 includes a driving member 31, a connecting shaft 32, a permanent magnet 33, a mounting plate 34 and a stirring pole 35. The connecting shaft 32 passes through the sleeve 21, and the connecting shaft 32 and the sleeve 21 are rotatably connected. The output shaft of the driving member 31 is transmission-connected to the input end of the connecting shaft 32, and the output end of the connecting shaft 32 is fixedly connected to the permanent magnet 33. The driving member 31, the connecting shaft 32 and the permanent magnet 33 are located on one side of the medium area 42. Furthermore, a small battery can be installed on the driving member 31 to realize direct energy supply.

[0048] The driving member 31 is an impeller. At this time, the impeller is located in the area where the heat exchange medium of the heat exchanger 5 is located. The impeller can transfer the flow power of the heat exchange medium to realize rotation, and the rotation of the impeller drives the permanent magnet 33 on the connecting shaft 32 to rotate.

[0049] like Figure 4 As shown, the impeller and the connecting shaft 32 are coaxially arranged. At this time, the impeller is located at the end of the tube bundle 4 with a gap, and the impeller is installed on the connecting shaft 32;

[0050] In another embodiment, if Figure 5 As shown, the impeller and the connecting shaft 32 are arranged in different axes. At this time, the impeller is located at the port of the remaining tube bundle 4. The impeller and the connecting shaft 32 are connected by a gear set. The port of the tube bundle 4 where the impeller is located has a flow path of the fluid, so that greater power can be obtained, so that the stirring pole 35 rotates faster and generates a larger vortex, so that the temperature in the tube bundle 4 is uniform.

[0051] The mounting plate 34 and the stirring pole 35 are located on one side of the heat exchange zone 41, the mounting plate 34 and the sealing head 1 are fixedly connected, the stirring pole 35 is arranged on the side of the mounting plate 34 away from the sealing head 1, and the stirring pole 35 is attached to the mounting plate 34 by the magnetic force of the permanent magnet 33, so that a vortex is formed in the heat exchange zone 41 in the tube bundle 4, and new fluid is continuously replaced, so that the closed tube bundle 4 can be utilized to avoid a decrease in heat exchange efficiency. The present application only needs to make the fluid in the tube bundle 4 have a certain fluidity to avoid temperature differences in the fluid in the tube bundle 4. The stirring power required for the flow of the fluid in the tube bundle 4 to achieve uniform temperature distribution is extremely small.

[0052] The stirring pole 35 and the mounting plate 34 are rotatably connected to prevent the stirring pole 35 from being separated from the mounting plate 34 .

[0053] Blocking process:

[0054] When the sealing head 1 is placed, its initial maximum outer diameter is larger than the inner diameter of the inner wall of the tube bundle 4 .

[0055] Insert the sealing head 1 into the damaged end of the tube bundle 4. At this time, the sealing head 1 is in a compressed state. The straight portion 11 can contact the inner wall of the tube bundle 4 under the elastic tension of the adjusting portion 12. After the sealing head 1 is placed in the end of the tube bundle 4, the adjusting nut 22 is rotated to make the adjusting plate 23 thereon approach the adjusting portion 12. Since the adjusting portion 12 has a contraction structure, the adjusting plate 23 makes the adjusting portion 12 expand outward, and the adjusting portion 12 drives the straight portion 11 to expand outward, so as to be close to the inner wall of the tube bundle 4. Due to the squeezing of the adjusting plate 23, the friction between the sealing head 1 and the tube bundle 4 is increased, so that the sealing head 1 is close to the inner wall of the tube bundle 4 to prevent it from being displaced under the impact force of the fluid.

[0056] After the sealing is completed, the driving member 31 is an impeller, and the impeller and the connecting shaft 32 are coaxially arranged. At this time, the impeller is located at the port of the tube bundle 4 with a gap, and the impeller is installed on the connecting shaft 32. The impeller is driven to rotate by the flow of the fluid, and the impeller drives the permanent magnet 33 to rotate. The permanent magnet 33 drives the stirring pole 35 to rotate through magnetic force. The stirring pole 35 disturbs the fluid in the sealed tube bundle 4, so that the temperature of the fluid therein is evenly distributed.

[0057] In another embodiment: the stirring assembly 3 includes a cover shell with a plurality of through holes, the cover shell and the mounting plate 34 are fixedly connected, the cover shell and the mounting plate 34 enclose a stirring zone, the stirring pole 35 is located in the stirring zone, the cover shell can prevent the stirring pole 35 from falling off, so that it is always maintained within the adsorption range of the permanent magnet 33; the through holes of the cover shell 36 are arranged at intervals along its circumference, and the through holes are arranged at an angle, and the inclination direction of the through holes is the same as the rotation direction of the stirring pole 35, which can enhance the flow of the fluid and reduce power loss.

[0058] Furthermore, an adjustable driving member can be installed, and the adjustable driving member is connected through a worm gear structure and an adjusting nut to achieve automatic adjustment.

[0059] When in use, the sealing plug of the present application is placed in the tube bundle 4, and the adjusting nut 22 is turned to drive the adjusting plate 23 to approach the sealing end of the adjusting portion 12, so that the straight portion 11 expands until it fits the inner wall of the tube bundle 4 to complete the sealing; during the heat exchange process, the driving member 31 starts to drive the permanent magnet 33 to rotate through the connecting shaft 32, and the permanent magnet 33 drives the stirring pole 35 to rotate through magnetic force. Embodiment 2:

[0060] The technical feature that distinguishes Example 2 from Example 1 is: driving member 31.

[0061] like Figure 2 As shown, the driving member 31 is a motor, so that the rotation of the stirring pole 35 can be controlled, and the degree of automation is higher.

[0062] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A heat exchanger tube bundle sealing plug, characterized in that: include: A sealing head (1) used for sealing a tube bundle (4) of a heat exchanger, the sealing head (1) being in a hemispherical structure, the sealing head (1) comprising a straight portion (11) and an adjusting portion (12), the straight portion (11) being used for contacting the inner wall of the tube bundle (4), the straight portion (11) and the adjusting portion (12) being fixedly connected, the sealing head (1) being made of an elastic material, and the adjusting portion (12) allowing the straight portion (11) to fit the inner wall of the tube bundle (4); An adjustment component (2) for controlling the spacing between the straight portions (11) of the sealing head (1), wherein the adjustment component (2) is arranged inside the sealing head (1); And a stirring assembly (3) for providing power to the fluid in the tube bundle (4), wherein the stirring assembly (3) is mounted on the sealing head (1).

2. A heat exchanger tube bundle sealing plug according to claim 1, characterized in that: A raised ring (13) is formed on one side of the straight portion (11) close to the inner wall of the tube bundle (4), and the raised ring (13) is used to contact the inner wall of the tube bundle (4).

3. A heat exchanger tube bundle sealing plug according to claim 1, characterized in that: The adjusting portion (12) gradually shrinks toward the center from its head end to its tail end and completes closing; The adjustment assembly (2) comprises a sleeve (21), an adjustment nut (22) and an adjustment plate (23); the sleeve (21) is fixedly connected to the sealing head (1); an outer wall surface of the sleeve (21) has an external thread matching the internal thread on the adjustment nut (22); the adjustment nut (22) and the sleeve (21) are threadedly connected; the adjustment plate (23) and the adjustment nut (22) are connected; and the outer ring of the adjustment plate (23) is in contact with the adjustment portion (12).

4. A heat exchanger tube bundle sealing plug according to claim 3, characterized in that: The outer ring of the adjustment plate (23) is provided with an arc-shaped corner (231).

5. A heat exchanger tube bundle sealing plug according to claim 3, characterized in that: The sealing head (1) divides the space inside the tube bundle (4) into a heat exchange area (41) and a medium area (42); The stirring assembly (3) comprises a driving member (31), a connecting shaft (32), a permanent magnet (33), a mounting plate (34) and a stirring pole (35); the connecting shaft (32) passes through the sleeve (21), and the connecting shaft (32) and the sleeve (21) are rotatably connected; the output shaft of the driving member (31) is transmission-connected to the input end of the connecting shaft (32); the output end of the connecting shaft (32) is fixedly connected to the permanent magnet (33); and the driving member (31), the connecting shaft (32) and the permanent magnet (33) are located on one side of the medium area (42); The mounting plate (34) and the stirring pole (35) are located on one side of the heat exchange region (41); the mounting plate (34) and the sealing head (1) are fixedly connected; and the stirring pole (35) is arranged on a side of the mounting plate (34) away from the sealing head (1).

6. A heat exchanger tube bundle sealing plug according to claim 5, characterized in that: The stirring assembly (3) comprises a cover shell having a plurality of through holes, the cover shell and the mounting plate (34) are fixedly connected, the cover shell and the mounting plate (34) enclose a stirring zone, and the stirring magnetic pole (35) is located in the stirring zone.

7. A heat exchanger tube bundle sealing plug according to claim 6, characterized in that: The through holes of the cover shell are arranged at intervals along its circumference, and the through holes are arranged obliquely, and the inclination direction of the through holes is the same as the rotation direction of the stirring magnetic pole (35).

8. A heat exchanger tube bundle sealing plug according to claim 5, characterized in that: The driving member (31) is an impeller or a motor.

9. A heat exchanger tube bundle sealing plug according to claim 5, characterized in that: The stirring magnetic pole (35) and the mounting plate (34) are rotatably connected.

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