Multi-head heat shrink tube oil type expansion equipment

Abstract

The invention provides multi-head heat shrink tube oil type expanding equipment, and relates to the technical field of heat shrink tube expanding equipment, the multi-head heat shrink tube oil type expanding equipment comprises a tube expanding machine main body, a plurality of tube expanding outer cylinder molds are mounted on the tube expanding machine main body, a mounting groove is formed in one end of each tube expanding outer cylinder mold, and a tube expanding inner cylinder mold is mounted in each mounting groove; a working channel is formed in the pipe expanding inner cylinder mold in a penetrating mode. According to the oil type expanding equipment for the multi-head heat shrink tube, through the arrangement of the tube expanding machine body, the tube expanding outer cylinder mold, the tube expanding inner cylinder mold, the cooling mechanism and the wiping mechanism, the heat shrink tube is subjected to tube expanding treatment in an internal expanding mode, and the heat shrink tube is subjected to cooling forming; and glycerin on the outer wall of the heat shrink tube is wiped and cleaned through the wiping mechanism, traditional cleaning procedures are reduced, environment pollution caused by water mist generated by mixing water into glycerin is reduced, the workshop space occupied by cleaning equipment is reduced, workers can conveniently and reasonably utilize the workshop space, and the space utilization rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of heat shrinkable tube expanding equipment, and particularly to a multi-head oil-type heat shrinkable tube expanding equipment. Background Art

[0002] Heat shrinkable tube expanding equipment plays a key role in the production process of heat shrinkable tubes. It determines physical indexes such as the size, shrinkage ratio, and axial shrinkage rate of heat shrinkable tubes, and has a direct impact on the product quality and performance. The expanding process of heat shrinkable tubes mainly includes steps such as wire feeding, conveying, heating, expanding, pulling, and wire winding. Among them, the expansion of the heated tube in the expanding device is the key process. Traditional expanding equipment usually uses glycerol as the heating medium, and realizes the expansion and shaping of heat shrinkable tubes through components such as a vacuum chamber and a sizing sleeve.

[0003] The multi-head oil-type heat shrinkable tube expanding equipment can expand multiple heat shrinkable tubes simultaneously, greatly improving the production efficiency and meeting the requirements of large-scale production. When expanding heat shrinkable tubes, using glycerol as the heating medium requires cleaning the heat shrinkable tubes, and the cleaning liquid is likely to mix into the glycerol, resulting in a decrease in the decomposition temperature of glycerol, thereby generating a large amount of smoke and causing environmental pollution. Summary of the Invention

[0004] Based on the technical problems existing in the background art, the present invention proposes a multi-head oil-type heat shrinkable tube expanding equipment.

[0005] A multi-head oil-type heat shrinkable tube expanding equipment proposed by the present invention includes an expanding machine main body. A plurality of outer expanding tube molds are installed on the expanding machine main body. An installation groove is opened at one end of the outer expanding tube mold, and an inner expanding tube mold is installed in the installation groove. A working channel is penetrated through the inner expanding tube mold. An inlet pipe communicating with the working channel is opened at the other end of the outer expanding tube mold. The inner diameter of the working channel is larger than that of the inlet pipe; The working channel is divided into an expanding section, a cooling section, and a cleaning section. The expanding section is located downstream of the inlet pipe, the cooling section is located downstream of the expanding section, and the cleaning section is located downstream of the cooling section; The heat shrinkable tube can perform an expanding operation in the expanding section; A cooling mechanism is installed on the outer expanding tube mold, and the cooling mechanism can cool down the heat shrinkable tube; A wiping mechanism is also installed on the inner expanding tube mold, and the wiping mechanism can wipe the outer periphery of the heat shrinkable tube.

[0006] Preferably, the wiping mechanism includes a release disc, a winding disc, a motor, and a cleaning strip; a sealing box is installed on the expanding tube outer cylinder mold, a storage and release chamber is formed inside the expanding tube outer cylinder mold, the release disc is rotatably installed in the storage and release chamber, the winding disc is also rotatably installed in the storage and release chamber, the motor is installed in the storage and release chamber, and the output shaft of the motor is connected to the winding disc; Both ends of the cleaning strip are respectively wound on the release disc and the winding disc, a spiral movement groove adapted to the cleaning strip is formed on the inner wall of the expanding tube inner cylinder mold, and the cleaning strip can slide in the spiral movement groove.

[0007] Preferably, the cleaning strip includes a limiting strip and an alcohol cotton strip; the alcohol cotton strip is bonded to one side of the limiting strip, and the width of the limiting strip is greater than the width of the alcohol cotton strip.

[0008] Preferably, the wiping mechanism further includes an air suction pipe and a pump; a plurality of air suction holes are formed on the inner wall of the cleaning section of the expanding tube inner cylinder mold, the plurality of air suction holes are arranged in a spiral pattern, and the plurality of air suction holes are all communicated with the air suction pipe, and the air suction pipe is communicated with the pump.

[0009] Preferably, the cooling device includes a cooling water pipe, a cooling pump, a mounting block, a condenser, and a heat exchange block; a cooling water cavity is formed between the expanding tube outer cylinder mold and the expanding tube inner cylinder mold, the cooling water cavity is located on the outer periphery of the cooling section, both ends of the cooling water pipe are communicated with the cooling water cavity, and the cooling pump is used to drive the cooling water to circulate in the cooling water pipe and the cooling water cavity; The mounting block is fixedly installed in the storage and release chamber of the sealing box, the condenser is fixedly installed in the mounting block, the heat exchange block is fixedly installed on the top of the mounting block, and the cooling water pipe penetrates through the heat exchange block.

[0010] Preferably, a condensation channel is formed on the mounting block, both ends of the condensation channel are communicated with the storage and release chamber inside the sealing box, and a fan is installed at the air inlet of the condensation channel; A collection component is installed on the alcohol cotton strip, and the collection component is used to collect the liquid condensed in the condensation channel.

[0011] Preferably, a section of the condensation channel is a deceleration channel section, and when the steam in the storage and release chamber enters the deceleration channel section, the flow rate of the steam slows down.

[0012] Preferably, the collection component includes a collection box; an insertion slot is formed on one side of the sealing box, the collection box is detachably inserted into the insertion slot, the collection box is located below the mounting block, and a collection channel is formed on the mounting block, and both ends of the collection channel are respectively communicated with the condensation channel and the collection box.

[0013] A multi-head heat shrinkable tube oil expansion device proposed by the present invention has the following beneficial effects: By setting the tube expansion machine main body, tube expansion outer cylinder mold, tube expansion inner cylinder mold, cooling mechanism and wiping mechanism, the heat shrinkable tube is expanded by an internal expansion method, cooled and formed, and then the glycerin on the outer wall of the heat shrinkable tube is wiped and cleaned by the wiping mechanism, reducing the traditional cleaning process, reducing the generation of water mist due to the mixing of water in glycerin and polluting the environment, reducing the factory space occupied by the cleaning equipment, enabling the staff to reasonably utilize the factory space and improving the space utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. is a schematic diagram of the overall structure of a multi-head heat shrinkable tube oil expansion device proposed by the present invention.

[0015] Figure 2 FIG. is a side cross-sectional view of the tube expansion mold and the sealing box in a multi-head heat shrinkable tube oil expansion device proposed by the present invention.

[0016] Figure 3 FIG. is a side cross-sectional view of the tube expansion mold in a multi-head heat shrinkable tube oil expansion device proposed by the present invention.

[0017] Figure 4 FIG. is an end cross-sectional view of the cleaning strip in a multi-head heat shrinkable tube oil expansion device proposed by the present invention.

[0018] Figure 5 FIG. is a top cross-sectional view of the position of the condensation channel in the mounting block in a multi-head heat shrinkable tube oil expansion device proposed by the present invention.

[0019] Figure 6 FIG. is a schematic diagram of the movement of steam in the deceleration channel section of the condensation channel in a multi-head heat shrinkable tube oil expansion device proposed by the present invention.

[0020] In the figure: 1. Tube expansion machine main body; 2. Tube expansion outer cylinder mold; 3. Tube expansion inner cylinder mold; 4. Release disc; 5. Take-up reel; 6. Motor; 7. Limit strip; 8. Alcohol cotton strip; 9. Suction pipe; 10. Suction hole; 11. Cooling water pipe; 12. Cooling pump; 13. Mounting block; 14. Condenser; 15. Heat exchange block; 16. Cooling water cavity; 17. Condensation channel; 18. Fan; 19. Collection box; 20. Collection channel; 21. Sealing box. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Refer to Figures 1-6, the present invention provides a multi-head heat-shrinkable tube oil expansion device, which includes an expansion machine main body 1. A plurality of outer expansion tube molds 2 are installed on the expansion machine main body 1. A plurality of liquid storage grooves are provided on the top surface of the expansion machine main body 1. The liquid storage grooves are used to collect glycerin dripping from the outer wall of the heat-shrinkable tube, avoiding glycerin dripping onto the outside and causing pollution. An installation groove is provided at one end of the outer expansion tube mold 2, and an inner expansion tube mold 3 is installed in the installation groove. A working channel is penetrated through the inner expansion tube mold 3. An inlet pipe communicating with the working channel is provided at the other end of the outer expansion tube mold 2. The diameter of the inlet pipe is the same as the diameter of the heat-shrinkable tube. The inner diameter of the working channel is larger than the inner diameter of the inlet pipe. The outer expansion tube mold 2 and the inner expansion tube mold 3 form an expansion mold. The working channel is divided into an expansion section, a cooling section and a cleaning section. The expansion section is located downstream of the inlet pipe, the cooling section is located downstream of the expansion section, and the cleaning section is located downstream of the cooling section. The heat-shrinkable tube can perform an expansion operation in the expansion section. A cooling mechanism is installed on the outer expansion tube mold 2, and the cooling mechanism can cool down the heat-shrinkable tube. The heat-shrinkable tube is first uniformly heated by glycerin, and the heated heat-shrinkable tube enters through the inlet pipe. The inner expansion method is adopted in this expansion machine. When the heat-shrinkable tube reaches the expansion section of the working channel, under the action of the air pressure inside the tube, the heat-shrinkable tube expands. The expanded diameter of the heat-shrinkable tube is the same as the inner diameter of the working channel. After the heat-shrinkable tube expands to the required size, the heat-shrinkable tube continues to move forward. The forward heat-shrinkable tube reaches the cooling section for cooling treatment. The expanded heat-shrinkable tube is quickly cooled, making it enter the glass state, so as to maintain the expanded shape. A wiping mechanism is also installed on the inner expansion tube mold 3, and the wiping mechanism can wipe the outer periphery of the heat-shrinkable tube. Because the heat-shrinkable tube is uniformly heated by glycerin, but glycerin will adhere to the outer periphery of the heat-shrinkable tube and needs to be cleaned. The glycerin on the outer wall of the heat-shrinkable tube can be wiped clean by the wiping mechanism to complete the cleaning of glycerin, without the need to use the process of water flushing, reducing the environmental pollution caused by the generation of smoke when the cleaning water is mixed into the glycerin, thereby ensuring the hygiene and quality of the heat-shrinkable tube (glycerin is a hydrophilic substance, easy to mix with water, but at the same time it also has a certain viscosity and may adsorb dust or other impurities; if only water flushing is used, impurities may remain due to the viscosity of glycerin, or water droplets may remain on the outer wall of the heat-shrinkable tube due to the surface tension of water, and additional drying equipment is also required; alcohol is a good organic solvent and has a good solubility for glycerin. When wiping with an alcohol cotton strip 8, it can quickly dissolve and remove the glycerin on the outer wall of the heat-shrinkable tube, making the surface of the heat-shrinkable tube cleaner; alcohol has a lower boiling point and is easy to volatilize at room temperature.After wiping the outer wall of the heat shrinkable tube with the alcohol swab 8, the alcohol will quickly volatilize, rapidly drying the surface of the heat shrinkable tube. No additional drying treatment is required, improving work efficiency. The rapid drying can reduce the exposure time of the heat shrinkable tube in a humid environment, lowering the risk of contamination or corrosion caused by residual moisture, which is beneficial for subsequent tube expansion operations and the performance of the heat shrinkable tube. In the traditional method, most use water flushing. The heat shrinkable tube requires at least two cleaning processes to ensure its hygiene. The cleaning equipment will occupy a large amount of space in the factory building, affecting the space utilization rate of the factory building.

[0022] As Figure 2 shown in the figure, the wiping mechanism includes a release disk 4, a winding disk 5, a motor 6, and a cleaning strip. A sealing box 21 is installed on the outer tube die 2 for tube expansion. A winding and unwinding chamber is provided inside the outer tube die 2 for tube expansion. The release disk 4 is rotatably installed in the winding and unwinding chamber. The winding and unwinding chamber is in a relatively closed state, reducing the overflow of internal alcohol vapor. The winding disk 5 is also rotatably installed in the winding and unwinding chamber. The motor 6 is installed in the winding and unwinding chamber. The output shaft of the motor 6 is connected to the winding disk 5. Both ends of the cleaning strip are respectively wound on the release disk 4 and the winding disk 5. A spiral movement groove adapted to the cleaning strip is provided on the inner wall of the inner tube die 3 for tube expansion. The cross-sectional view of the spiral movement groove is T-shaped. The cleaning strip can slide in the spiral movement groove. The cleaning strip includes a limiting strip 7 and an alcohol swab 8. The alcohol swab 8 is adhered to one side of the limiting strip 7. The material of the limiting strip 7 is plastic. The limiting strip 7 ensures that the alcohol swab 8 will not be pulled and deformed, ensuring that the alcohol swab 8 can wipe the outer wall of the heat shrinkable tube. The width of the limiting strip 7 is greater than the width of the alcohol swab 8. The limiting strip 7 can limit the position of the alcohol swab 8, ensuring that the alcohol swab 8 can slide in the spiral movement groove. At the same time, when the alcohol swab 8 moves spirally, it can wipe the outer wall of the heat shrinkable tube (the polarity of alcohol molecules enables them to interact with glycerol molecules, dissolving and taking away glycerol from the surface of the heat shrinkable tube). After the alcohol swab 8 takes away the glycerol on the outer wall of the heat shrinkable tube, it ensures the cleaning effect of the glycerol on the outer wall of the heat shrinkable tube. In addition, the movement direction of the alcohol swab 8 is opposite to the movement direction of the heat shrinkable tube. The alcohol swab 8 moves in a reverse spiral, enabling multiple wiping treatments on the outer wall of the heat shrinkable tube, thus ensuring the cleaning effect of the glycerol on the outer wall of the heat shrinkable tube.

[0023] In actual situations, when the alcohol swab 8 wipes the outer wall of the heat shrinkable tube, under the extrusion of the alcohol swab 8, the heat shrinkable tube may be deformed, affecting the wiping effect. At the same time, the alcohol on the alcohol swab 8 will adhere to the surface of the heat shrinkable tube and evaporate into the factory building. Therefore, the following design is available.

[0024] As Figure 2 and Figure 3As shown in the figure, the wiping mechanism further includes an air suction pipe 9 and a pump; a plurality of air suction holes 10 are formed in the inner wall of the cleaning section of the expanding tube inner cylinder mold 3, and the plurality of air suction holes 10 are arranged in a spiral pattern. The path of the air suction holes 10 is parallel and staggered with the spiral of the alcohol cotton strip 8. The path of the air suction holes 10 is longer than the length of the path of the alcohol cotton strip 8 (that is, after the heat shrinkable tube is wiped by the alcohol cotton strip 8, there will still be air suction holes 10 arranged on the outer periphery of the heat shrinkable tube), and the plurality of air suction holes 10 are all communicated with the air suction pipe 9, and the air suction pipe 9 is communicated with the pump. While the alcohol cotton strip 8 wipes the outer wall of the heat shrinkable tube, the pump works to pump out the gas (including alcohol vapor) in the cleaning section, and at the same time, the heat shrinkable tube can be adsorbed, so that the heat shrinkable tube has an outward expansion force, and at the same time, it cooperates with the expansion force inside the heat shrinkable tube to ensure that the heat shrinkable tube will not be deformed, so as to test the cleaning effect of the heat shrinkable tube. In addition, after the heat shrinkable tube is shaped, it can also increase the air flow speed in the cleaning section, increase the evaporation speed of the alcohol on the outer wall of the heat shrinkable tube, inhale the evaporated alcohol, and reduce the alcohol vapor entering the workshop.

[0025] As Figure 2 and Figure 3 As shown in the figure, the cooling device includes a cooling water pipe 11, a cooling pump 12, a mounting block 13, a condenser 14 and a heat exchange block 15; the condenser 14 can form a cooling water cavity 16 between the expanding tube outer cylinder mold 2 and the expanding tube inner cylinder mold 3 for multiple condensing water pipes (schematic diagram in the figure, specific structure diagram not given, and external cooling water enters the condensing water pipes for heat exchange). The cooling water cavity 16 is located on the outer periphery of the cooling section. Both ends of the cooling water pipe 11 are communicated with the cooling water cavity 16. The cooling pump 12 is used to drive the cooling water to circulate in the cooling water pipe 11 and the cooling water cavity 16. The mounting block 13 is fixedly installed in the retracting and extending chamber of the sealing box 21, the condenser 14 is fixedly installed in the mounting block 13, the heat exchange block 15 is fixedly installed on the top of the mounting block 13, and the cooling water pipe 11 penetrates through the heat exchange block 15. When the heat shrinkable tube is cooled and shaped, the cooling pump 12 works to make the cooling water circulate in the cooling water pipe 11 and the cooling water cavity 16 (in the figure, the inlet and outlet of the cooling water cavity 16 are on the same side, which will affect the replacement of the cooling water in the cooling water cavity 16. In actual situations, the inlet and outlet will be designed according to the actual situation). When the cooling water flows in the cooling water pipe 11, the condenser 14 works, and at the same time, the mounting block 13, the heat exchange block 15 and the cooling water in the cooling water pipe 11 perform heat replacement, so as to ensure the temperature of the cooling water. At the same time, the mounting block 13 can also cool the air in the retracting and extending chamber, so that the temperature of the alcohol vapor in the retracting and extending chamber becomes lower, reducing the occurrence of spontaneous combustion and reducing potential safety hazards. After the heat shrinkable tube is expanded, it needs to be cooled and formed to enter the glass state, so as to maintain the shape after expansion and ensure the quality of the heat shrinkable tube. After cooling and forming, it is also convenient for the alcohol cotton strip 8 to wipe the outer wall of the heat shrinkable tube.

[0026] AsFigure 2 and Figure 5 As shown in Figure 5 , a condensation channel 17 is provided on the mounting block 13. Both ends of the condensation channel 17 are communicated with the storage and release chamber in the sealed box 21. A fan 18 is installed at the air inlet of the condensation channel 17. A collection assembly is installed on the alcohol cotton strip 8. The collection assembly is used to collect the liquid condensed in the condensation channel 17. In actual situations, the alcohol in the alcohol cotton strip 8 is likely to volatilize into the storage and release chamber. When replacing the new alcohol cotton strip 8, it may cause the alcohol in the storage and release chamber to enter the workshop. Therefore, the fan 18 operates to blow the gas in the storage and release chamber into the condensation channel 17. A heat conduction member (metal sheet) is provided between the inner wall of the condensation channel 17 and the condenser 14, which can condense the gas entering the condensation channel 17. The condensed liquid generated after condensation is dripped into the collection assembly, condensing the alcohol vapor into an alcohol solution. At the same time, the volatilized glycerol can also be condensed and collected, and then the condensed liquid is recycled.

[0027] As Figure 5 and Figure 6 As shown in Figure 6 , one section of the condensation channel 17 is a deceleration channel section. When the steam in the storage and release chamber enters the deceleration channel section, the flow rate of the steam slows down. The working principle of the deceleration channel section in the condensation channel 17 is similar to that of the Tesla valve channel. The movement trajectory of the steam in the condensation channel 17 is as shown in Figure 6 . The steam first advances in a single channel and then divides into two channels. The steam in one channel goes straight, and the steam in the other channel needs to follow a curve. The movement directions of the two steam flows are opposite at the meeting point, and the two steam flows collide and stagnate at the meeting point, thereby slowing down the running speed of the steam, increasing the running time of the steam in the condensation channel 17, enabling the steam to have sufficient time for heat exchange and be condensed into a liquid for collection. In addition, the uncondensed steam re-enters the storage and release chamber after heat exchange from the condensation channel 17, cooling the gas and the alcohol cotton strip 8 in the storage and release chamber. The alcohol cotton strip 8 can maintain a low temperature to wipe the outer wall of the heat shrinkable tube, and can cool and wipe the heat shrinkable tube again, and at the same time can reduce the situation of alcohol spontaneous combustion caused by too high temperature.

[0028] As Figure 1 and Figure 2 ​​As shown in the figure, the collection component includes a collection box 19; an insertion slot is provided on one side of the sealed box 21, and the collection box 19 is detachably inserted into the insertion slot. The collection box 19 is located below the mounting block 13. A collection channel 20 is provided on the mounting block 13. The two ends of the collection channel 20 are respectively communicated with the condensation channel 17 and the collection box 19. After the collection box 19 is inserted into the insertion slot, the top opening of the collection box 19 is blocked by the bottom surface of the mounting block 13, so that the inside of the collection box 19 is in a relatively blocked state. The collection channel 20 provided on the mounting block 13 can communicate the collection box 19 and the condensation channel 17, so as to ensure the collection of the condensate. In addition, a recovery pump can be designed. When the condensate in the collection box 19 reaches a set amount, the condensate in the collection box 19 is pumped away by the recovery pump for treatment.

[0029] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An oil-type expansion device for multi-head heat shrinkable tubes, characterized in that, It includes an expanding pipe machine main body (1), on which a plurality of expanding pipe outer cylinder molds (2) are installed. One end of the expanding pipe outer cylinder mold (2) is provided with an installation groove, and an expanding pipe inner cylinder mold (3) is installed in the installation groove. A working channel is penetrated through the expanding pipe inner cylinder mold (3). The other end of the expanding pipe outer cylinder mold (2) is provided with an inlet pipe opening communicated with the working channel, and the inner diameter of the working channel is larger than that of the inlet pipe opening. The working channel is divided into an expanding section, a cooling section and a cleaning section. The expanding section is located downstream of the inlet pipe opening, the cooling section is located downstream of the expanding section, and the cleaning section is located downstream of the cooling section. The heat shrinkable tube can perform expanding operation in the expanding section. A cooling mechanism is installed on the expanding pipe outer cylinder mold (2), and the cooling mechanism can cool down the heat shrinkable tube. A wiping mechanism is also installed on the expanding pipe inner cylinder mold (3), and the wiping mechanism can wipe the outer periphery of the heat shrinkable tube.

2. The multi-head heat-shrinkable tube oil expansion device according to claim 1, characterized in that, The wiping mechanism includes a release disc (4), a winding disc (5), a motor (6) and a cleaning strip. A sealing box (21) is installed on the expanding pipe outer cylinder mold (2). A winding and unwinding chamber is formed inside the expanding pipe outer cylinder mold (2). The release disc (4) is rotatably installed in the winding and unwinding chamber, the winding disc (5) is also rotatably installed in the winding and unwinding chamber, the motor (6) is installed in the winding and unwinding chamber, and the output shaft of the motor (6) is connected to the winding disc (5). Both ends of the cleaning strip are respectively wound on the release disc (4) and the winding disc (5). A spiral movement groove adapted to the cleaning strip is formed on the inner wall of the expanding pipe inner cylinder mold (3), and the cleaning strip can slide in the spiral movement groove.

3. A multi-head heat-shrinkable tube oil expansion device according to claim 2, characterized in that, The cleaning strip includes a limiting strip (7) and an alcohol cotton strip (8). The alcohol cotton strip (8) is bonded to one side of the limiting strip (7), and the width of the limiting strip (7) is larger than that of the alcohol cotton strip (8).

4. A multi-head heat shrinkable tube oil expansion device according to claim 3, characterized in that, The wiping mechanism further includes an air suction pipe (9) and a pump. A plurality of air suction holes (10) are formed on the inner wall of the cleaning section of the expanding pipe inner cylinder mold (3). The plurality of air suction holes (10) are arranged in a spiral manner, and the plurality of air suction holes (10) are all communicated with the air suction pipe (9), and the air suction pipe (9) is communicated with the pump.

5. A multi-head heat-shrinkable tube oil expansion device according to claim 4, characterized in that, The cooling device includes a cooling water pipe (11), a cooling pump (12), a mounting block (13), a condenser (14) and a heat exchange block (15). A cooling water cavity (16) is formed between the expanding pipe outer cylinder mold (2) and the expanding pipe inner cylinder mold (3). The cooling water cavity (16) is located on the outer periphery of the cooling section. Both ends of the cooling water pipe (11) are communicated with the cooling water cavity (16), and the cooling pump (12) is used to drive the cooling water to circulate in the cooling water pipe (11) and the cooling water cavity (16). The mounting block (13) is fixedly installed in the winding and unwinding chamber of the sealing box (21). The condenser (14) is fixedly installed in the mounting block (13). The heat exchange block (15) is fixedly installed on the top of the mounting block (13), and the cooling water pipe (11) penetrates through the heat exchange block (15).

6. A multi-head heat-shrinkable tube oil expansion device according to claim 5, characterized in that, A condensation channel (17) is formed in the mounting block (13). Both openings at the two ends of the condensation channel (17) communicate with the storage and release chamber in the sealed box (21). A fan (18) is installed at the air inlet of the condensation channel (17). A collection assembly is installed on the alcohol cotton strip (8). The collection assembly is used to collect the liquid condensed in the condensation channel (17).

7. A multi-head heat-shrinkable tube oil expansion device according to claim 6, characterized in that, One section of the condensation channel (17) is a deceleration channel section. When the steam in the storage and release chamber enters the deceleration channel section, the flow rate of the steam slows down.

8. A multi-head heat-shrinkable tube oil expansion device according to claim 7, characterized in that, The collection assembly includes a collection box (19). An insertion slot is formed on one side of the sealed box (21). The collection box (19) is detachably inserted into the insertion slot. The collection box (19) is located below the mounting block (13). A collection channel (20) is formed in the mounting block (13). The two ends of the collection channel (20) communicate with the condensation channel (17) and the collection box (19) respectively.

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