Pipe drying device

Abstract

The utility model discloses a kind of pipe drying device, it is related to copper tube flaw detection ink mark drying field, to solve the problem of large drying energy consumption in prior art, the technical scheme used is, the import and export of hot air blower are all communicated with inner tube, and install plugging cover in tube port, inner tube and appearance are equipped with observation window, and there is heat preservation layer between inner tube and outer tube. By the import and export of hot air blower are all communicated with outer tube, hot air stream that blows over ink mark can be recycled and regenerated, so that airflow is regenerated with lower energy consumption. This mode can greatly reduce the energy consumption when drying, and the setting of observation window can facilitate the ink mark on copper tube to be between air inlet section and air outlet section, so that the ink mark is most stably swept and dried, and the state and position of ink mark are conveniently observed from outside;The heat loss of hot air stream can be reduced by the heat preservation layer between inner tube and outer tube, so as to further reduce energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of copper tube flaw detection ink drying technology, specifically a tube drying device. Background Technology

[0002] In the copper tube production process, flaw detection is required to ensure product quality. After flaw detection, defective parts are marked with ink, and the tubes need to be dried after marking. Existing drying equipment uses direct hot air blowing for drying. The hot air blower draws in air from the environment, heats it, and blows it out. The blown hot air is then directly released into the environment. This method requires the air to be heated from room temperature to the set temperature, resulting in high energy consumption. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a pipe drying device that can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model discloses a pipe drying device. The technical solution includes an outer pipe containing an inner pipe. An air inlet pipe and a return air pipe are connected to the inner pipe, and a hot air blower is installed between the air inlet pipe and the return air pipe. An insulation layer is provided between the outer pipe and the inner pipe. An end cap is connected to the end of the inner pipe, and the end cap has a through-hole. A sealing cap is detachably connected to the through-hole, and the sealing cap has a plug that slides in contact with the through-hole. The plug has a perforation that connects the inside of the inner pipe to the outside. By connecting the hot air blower to the outer pipe through the air inlet and return air pipes, the high-temperature fluid that has been blown through ink can be recovered through the return air pipe and reheated. At this time, the temperature difference of the fluid is small, resulting in low energy consumption.

[0005] As a preferred embodiment of this invention, the inner tube includes an air inlet section, an observation section, and an air outlet section. The outer walls at both ends of the observation section have barrier rings connected to the inner walls of the outer tube, dividing the space between the inner and outer tubes into three sections. The observation section can be used to observe the position of ink marks on the copper tube; placing it between the air inlet and air outlet sections achieves better drying results.

[0006] In a preferred embodiment of this invention, the outer wall of the end cap has an end cap, which is an annular cap with its inner annular surface connected to the end cap and its outer annular surface connected to the inner wall of the outer tube. The end cap can seal the end of the space between the inner and outer tubes, providing support for the outer tube while preventing air leakage from the end.

[0007] In a preferred embodiment of this invention, the sealing cap includes a cap body and a plug body, both of which are annular structures, with the inner rings of the plug body and the cap body connected. The annular cap body connects to the plug body, and the annular plug body allows the copper tube to pass through. The plug body can also be solid. When the ink is located at the end of the copper tube, i.e., the length of the copper tube on the ink side is insufficient to pass through the annular plug body, the end of the copper tube can be left inside the inner tube, and the end of the tube without a copper tube passing through can be completely sealed with the sealing cap containing the solid plug body to prevent air leakage.

[0008] As a preferred embodiment of this utility model, the cover body and the pipe-through port of the end cap are threaded together.

[0009] As a preferred embodiment of this utility model, the observation section has an observation window, which includes an outer window and an inner window. The outer window is connected to the outer tube, and the inner window is connected to the inner tube. The barrier ring is located on both sides of the observation window.

[0010] As a preferred embodiment of this utility model, it further includes a connector, which includes an inner ring and an outer ring. The outer ring connects the outer tube and the outer window, the inner ring connects the inner tube and the inner window, and the barrier ring connects the inner ring and the outer ring.

[0011] Compared with existing technologies, the advantages of this invention are as follows: By connecting both the inlet and outlet of the hot air blower to the outer pipe, this invention can recycle and regenerate the hot airflow that has blown over the ink, thereby regenerating the airflow with lower energy consumption. This method can significantly reduce energy consumption during drying, and the observation window allows the ink on the copper pipe to be positioned between the inlet and outlet sections, ensuring the ink is dried most stably and easily observed from the outside. The insulation layer between the inner and outer pipes reduces heat loss from the hot airflow, further reducing energy consumption. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model; Figure 2 This is an enlarged structural diagram of section A in the first embodiment of this utility model; Figure 3 This is a schematic diagram of the sealing cap structure according to the first embodiment of this utility model. Figure 1 ; Figure 4 This is a schematic diagram of the sealing cap structure according to the first embodiment of this utility model. Figure 2 ; Figure 5 This is a schematic diagram of the sealing cap in the second embodiment of this utility model.

[0013] In the diagram: 1. Outer pipe; 2. Inner pipe; 3. End cap; 4. End cap; 5. Hot air blower; 6. Inlet pipe; 7. Return pipe; 8. Connector; 9. Barrier ring; 10. Outer window; 11. Inner window; 12. Sealing cap; 1201. Cover body; 1202. Plug body; 13. Copper pipe. Detailed Implementation

[0014] 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. Example 1

[0015] like Figure 1 As shown, this utility model discloses a drying device for shorter pipes, suitable for straight pipes with a length 1-2 times the length of the drying device. The technical solution includes an outer pipe 1 and an inner pipe 2, which are coaxially arranged. Both the outer pipe 1 and the inner pipe 2 have two sections, which are axially symmetrical. A cap 3 is welded to the distal end of each section. The inner wall of the cap 3 is conical and has a through-hole port. A copper pipe 13 can pass through or exit through the through-hole port. When exiting, the conical inner wall guides the end of the copper pipe 13, making it easier to exit through the through-hole port. An annular groove is formed at the edge of the outer end face of the cap 3. An annular end cap 4 is welded inside the annular groove. The outer ring of the end cap 4 is welded to the inner wall of the end of the outer pipe 1.

[0016] To seal the conduit port, a sealing cap 12 was used, such as... Figure 3 , Figure 4 As shown, the sealing cap 12 includes a cap body 1201 and a plug body 1202. The cap body 1201 has an annular structure with an annular groove on its inner annular surface. A threaded hole is formed on the groove surface of the annular groove. The rubber plug body 1202 has an outer edge with a through hole. The edge slides in contact with the annular groove surface of the cap body 1201, and the through hole and the threaded hole are corresponding in position and size. A bolt can be used to install the plug body 1202 onto the cap body 1201 by passing through the through hole and engaging with the threaded hole. The sealing section of the plug body 1202 is a cylindrical composite frustum structure. The outer surface of the cylindrical structure can fit tightly against the inner diameter of the pipe port. The small diameter end face diameter of the frustum structure is the same as the outer diameter of the cylindrical structure, and the large diameter end face diameter is larger than the inner diameter of the pipe port. Since the flaw detection ink mark may be located in the middle or at the end of the copper tube 13, when it is located in the middle, the copper tube 13 needs to pass through the plug 1202; when it is located at the end, the end of the copper tube 13 will remain in the inner tube 2. Therefore, the plug 1202 has the following properties: Figure 3 The annular plug shown and as Figure 4The solid plug shown comes in two forms. To accommodate copper tubes 13 with different outer diameters, the annular plug body 1202 has various models with different inner diameters. The cap body 1201 has internal threads, and the tube insertion port has external threads. By engaging the internal and external threads, the cap body 1201 can be installed on the tube insertion port. To facilitate the passage of the copper tube 13 through the annular plug, a guide surface is also provided on the plug body 1202 to guide the copper tube 13 into the inner hole of the plug body 1202. To seal both ends and provide support for the copper tube 13, the inner hole of the plug body 1202 fits against the outer wall of the copper tube 13. However, there is a certain amount of damping between the plug body 1202 and the copper tube 13, but the sealing cap 12 can still slide along the copper tube 13.

[0017] In order to facilitate placing the ink between the two inner tubes 2, such as Figure 2 As shown, an outer ring of a connector 8 is welded to the end faces (i.e., opposite end faces) of the two outer tubes 1 that are close to each other, and an inner ring of a connector 8 is welded to the end faces (i.e., opposite end faces) of the two inner tubes 2 that are close to each other. A barrier ring 9 is welded between the outer ring and the inner ring. The outer rings of the two connectors 8 are connected to the glass outer window 10 by a heat-pressing glass-metal sealing process, and the inner rings of the two connectors 8 are connected to the glass inner window 11 by a heat-pressing glass-metal sealing process.

[0018] If it is necessary to further improve the heat insulation effect at the observation window, a vacuum port can be reserved on a barrier ring 9. During assembly, the connector 8, barrier ring 9, outer window 10 and inner window 11 are first combined into a unit. After the vacuum system is connected between the outer window 10 and the inner window 11 through the vacuum tube and vacuum port, the narrow part of the vacuum tube is melted to achieve the sealing of the inside of the observation window.

[0019] The two inner pipes 2 at both ends are the air inlet section and the air outlet section, respectively. The inner window 11 is the observation section. Both the air inlet section and the air outlet section are connected to flange ports on their sides. The flange port of the air inlet section is connected to the air inlet pipe 6 through the flange plate and bolts. The flange port of the air outlet section is connected to the return air pipe 7 through the flange plate and bolts. The air inlet pipe 6 and the return air pipe 7 are flanged to the air outlet and air inlet of the hot air blower 5.

[0020] To reduce heat loss, refractory fiber cotton is filled between the outer pipe 1 and the inner pipe 2 of the air inlet and outlet sections as insulation material.

[0021] The working principle of this utility model is as follows: Select a sealing cap 12 with a suitable inner diameter plug body 1202 according to the outer diameter of the copper tube 13. Insert the copper tube 13 into the inner tube 2 through the end cap 3 of the inner tube 2 near the air inlet pipe 6. If the ink stain is far from the end, then pass the end of the copper tube 13 through the other end through the pipe port. Observe the position of the ink stain through the outer window 10 and the inner window 11. When the ink stain is observed, it means that the ink stain has reached between the air inlet section and the air outlet section. Stop moving the copper tube 13. Insert the sealing cap 12 with the annular plug body 1202 through both ends of the copper tube 13. The inner annular surface of the plug body 1202 is in close contact with the outer wall of the copper tube 13 and slides in contact. After moving the sealing cap 12 to the pipe port, screw the sealing cap 12 so that the internal thread of the sealing cap 12 engages with the external thread of the pipe port until the plug body 1202 presses against the pipe port. After powering on the hot air blower 5 and turning on the switch, the hot air blower 5 runs, blowing hot air into the inner tube 2 through the air inlet pipe 6. The hot air flows along the air inlet section of the inner tube 2, through the observation section, to the air outlet section, and then back to the hot air blower 5 through the return air pipe 7 for reheating before continuing to be sent to the inner tube 2. During the blowing process, the ink status is observed and monitored through the outer window 10 and the inner window 11. If any abnormalities such as deformation or cracking occur, the hot air blower 5 is immediately powered off, drying is stopped, the copper tube 13 is removed, and the ink is cooled and re-sprayed as a remedy. If there are no abnormalities, the machine is stopped after the set blowing time (the specific blowing time will be confirmed experimentally during the process verification stage). After separating the sealing cap 12 and the tube end, the sealing cap 12 is removed, and the copper tube 13 is pulled out from the inner tube 2, completing the drying process.

[0022] If the ink stain is near the end of the copper pipe 13, observe the position of the ink stain through the outer window 10 and inner window 11 while inserting the pipe. Once the ink stain is observed, it means that the ink stain has reached between the air inlet section and the air outlet section. Stop moving the copper pipe 13, insert the sealing cap 12 of the annular plug 1202 onto the copper pipe 13, and then screw it onto the pipe end. Use the sealing cap 12 of the solid plug 1202 to seal the pipe end near the return air pipe 7.

[0023] After five drying cycles, the tube can be run unloaded for 2 minutes without the sealing cap 12 to reduce residue in the inner tube 2. Example 2

[0024] like Figure 5As shown, the difference between this embodiment and Embodiment 1 is that the inner diameter of the smallest section of the plug 1202 is still larger than the outer diameter of the copper tube 13. This embodiment is used for long tubes, coils, etc., whose length is more than twice the length of the drying device. During use, a traction device and a feeding device are respectively set at both ends of the tube drying device. The tube to be dried is on the feeding device, which supports the undried tube. After the end of the tube passes through the drying device, it is pulled and moved by the traction device, which provides the power for movement, so that the tube gradually passes through the drying device completely. At this time, there is a small gap between the tube and the plug 1202 to prevent the plug 1202 from rubbing against the ink marks and damaging the marking position. The gap will cause some heat loss, but compared with the existing technology where the hot air is completely dissipated into the environment, its energy-saving effect is still significant. In addition, by replacing different plugs 1202, the size of the gap between the tube and the plug 1202 can be controlled to be no more than 5mm.

[0025] The circuits and mechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. They are common knowledge.

[0026] Components not described in detail in this article are existing technologies.

[0027] 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 pipe drying device, characterized in that: The device includes an outer tube (1), an inner tube (2) inside the outer tube (1), an air inlet pipe (6) and a return air pipe (7) connected to the inner tube (2), and a hot air blower (5) installed between the air inlet pipe (6) and the return air pipe (7); there is an insulation layer between the outer tube (1) and the inner tube (2); the end of the inner tube (2) is connected to a cap (3), the cap (3) has a through-pipe port, a sealing cap (12) is detachably connected to the through-pipe port, the sealing cap (12) has a plug (1202), the plug (1202) slides in contact with the through-pipe port, the plug (1202) has a perforation, and the perforation connects the inside of the inner tube (2) to the outside.

2. The pipe drying device according to claim 1, characterized in that: The inner tube (2) includes an air inlet section, an observation section and an air outlet section. The outer walls at both ends of the observation section have barrier rings (9). The barrier rings (9) are connected to the inner wall of the outer tube (1) to divide the space between the inner tube (2) and the outer tube (1) into three sections.

3. The pipe drying device according to claim 1, characterized in that: The outer wall of the end cap (3) has an end cap (4), which is an annular cap. Its inner annular surface is connected to the end cap (3), and its outer annular surface is connected to the inner wall of the outer tube (1).

4. The pipe drying apparatus according to claim 1 or 3, characterized in that: The sealing cap (12) includes a cap body (1201) and a plug body (1202). Both the cap body (1201) and the plug body (1202) are annular structures, and the inner rings of the plug body (1202) and the cap body (1201) are connected.

5. The pipe drying apparatus according to claim 4, characterized in that: The cover (1201) is threadedly connected to the through-pipe port of the end cap (3).

6. The pipe drying apparatus according to claim 2, characterized in that: The observation section has an observation window, which includes an outer window (10) and an inner window (11). The outer window (10) is connected to the outer tube (1), and the inner window (11) is connected to the inner tube (2). The barrier ring (9) is located on both sides of the observation window.

7. The pipe drying apparatus according to claim 6, characterized in that: It also includes a connector (8), which includes an inner ring and an outer ring. The outer ring connects the outer tube (1) and the outer window (10), the inner ring connects the inner tube (2) and the inner window (11), and the barrier ring (9) connects the inner ring and the outer ring.

Images