A single-drawing structure and a spunbond spinning box using this structure

Abstract

This application relates to the field of non-woven fabrics, and in particular to a monomer extraction structure and a spunbond spinning box using this structure. A monomer extraction structure includes a main monomer extraction pipe and a plurality of monomer branch pipes connected to the main monomer extraction pipe. An air extraction hole penetrating the side wall of the main monomer extraction pipe along the length direction of the main monomer extraction pipe is provided on the side surface of the main monomer extraction pipe. Each monomer branch pipe includes an air extraction part, an oil collection part, and a condensation part. The air extraction part is in the shape of a slender plate and is connected to the air extraction hole. The outer side walls of the air extraction parts of adjacent monomer branch pipes are in contact with each other. An air extraction inner cavity communicating with the air extraction hole is formed at the center of the air extraction part. The slender air extraction parts of the monomer branch pipes are assembled in contact in the air extraction holes of the main monomer extraction pipe to form an entire slender air outlet. By using the slender air outlet to cooperate with air extraction, since the air outlet covers the entire side surface of the main monomer extraction pipe, the overall air flow can be extracted, and oily gas can be removed better.

Description

Technical Field

[0001] The present application relates to the field of non-woven fabrics, and in particular to a monomer extraction structure and a spunbond spinning box using this structure. Background Art

[0002] The spunbond non-woven technology is a process that uses high-temperature molten polymer materials, extrudes them into filaments, and then randomly lays them into a fabric. Since the polymer melt releases complex oily gases after flowing out of the spinneret, the oily gases are likely to re-condense and stick to the spinneret after encountering the process cold air, thereby affecting the spinning. Therefore, multiple exhaust pipes are arranged at positions around the spinneret on the spinning box to remove the oily gases.

[0003] Regarding the above related technologies, the applicant believes that there are the following defects: the existing solution only extracts air locally at the pipe connection, so the exhaust coverage is narrow, and it is difficult to achieve a good effect of removing oily gases. Summary of the Invention

[0004] In order to achieve a better effect of removing oily gases, the present application provides a monomer extraction structure and a spunbond spinning box using this structure.

[0005] In a first aspect, a monomer extraction structure provided by the present application adopts the following technical solution:

[0006] A monomer extraction structure includes a main monomer extraction pipe and multiple monomer branch pipes connected to the main monomer extraction pipe. The side of the main monomer extraction pipe is provided with air extraction holes that penetrate the side wall of the main monomer extraction pipe along the length direction of the main monomer extraction pipe. Each monomer branch pipe includes an air extraction part, an oil collection part, and a condensation part. The air extraction part is in the shape of a slender plate and is connected to the air extraction hole. The outer side walls of the air extraction parts of adjacent monomer branch pipes are in contact with each other. An air extraction cavity communicating with the air extraction hole is formed in the center of the air extraction part.

[0007] By adopting the above technical solution, multiple monomer branch pipes are provided, so that the slender plate-shaped air extraction parts of the monomer branch pipes are assembled in contact with each other in the air extraction holes of the main monomer extraction pipe to form an entire slender air outlet. The air extraction is carried out by means of the slender air outlet. Since the air outlet covers the entire side of the main monomer extraction pipe, the global air flow can be extracted, and there will be no air flow dead corners, which can better remove oily gases.

[0008] Preferably, a first connection area connected to the air extraction part and a second connection area connected to the condensation part are formed inside the oil collection part; the outer edges on both sides of the first connection area gradually incline towards each other from the air extraction part direction to the second connection area direction in the top view, and the inclination angle gradually increases; the height dimensions of the outer edges on both sides of the first connection area gradually decrease from the air extraction part direction to the second connection area direction in the side view, and the lower surface of the first connection area inclines downward from the air extraction part direction to the second connection area direction.

[0009] By adopting the above technical solution, the width of the first connection area gradually increases, enabling a wider area to be covered in the width direction to draw out the global air flow and avoid the occurrence of air flow dead zones. At the same time, due to the gradual decrease in height at the positions on both sides of the first connection area, the air extraction volume at this position will be relatively weakened compared to the middle area. In addition to oil removal, the single body structure can also control the temperature of the spinneret plate surface in the adjacent areas of the single body branch pipe by adjusting the air extraction speed, and regulate the visual uniformity of the fabric surface. Therefore, through this structural design, while the air extraction air flow covers a wider area, the high-speed air extraction area can be relatively concentrated, and when controlling the temperature of the spinneret plate in the area by locally increasing the air extraction volume, the control is more precise.

[0010] Preferably, in the top view, the outer edges on both sides of the second connection area gradually incline towards each other from the first connection area towards the condensation part, and the inclination angle gradually decreases; in the side view, the height dimension of the second connection area gradually increases from the first connection area towards the condensation part; the lower side surface of the second connection area inclines downwards from the first connection area towards the condensation part.

[0011] By adopting the above technical solution, the second connection area is smoothly transitionally connected to the first connection area in terms of width and gradually increases in height. Similarly, while the air extraction air flow covers a wider area, the high-speed air extraction area can be relatively concentrated, and when controlling the temperature of the spinneret plate in the area by locally increasing the air extraction volume, the control is more precise.

[0012] Preferably, the condensation part includes a horizontally extending pipe and a vertically extending pipe that are connected to the oil collection part. The connection end of the horizontally extending pipe to the oil collection part is the lower end, and an oil collection hole communicating with the second connection area is formed at a position on the lower side wall of the oil collection part close to the condensation part.

[0013] By adopting the above technical solution, the oil liquid condensed by the condensation part is collected and discharged at the oil collection hole.

[0014] Preferably, the oil collection hole is an elongated hole, and the length direction of the oil collection hole is along the circumferential direction of the oil collection part. The circumferential radian of the oil collection part covered by the oil collection hole is less than or equal to π / 2.

[0015] By adopting the above technical solution, the oil liquid can be smoothly discharged through the oil collection hole, and since the oil collection hole has a small radian due to its elongated structure, the influence on the air extraction volume at the position of the air extraction hole is small.

[0016] Preferably, a tee pipe connecting the horizontally extending pipe and the vertically extending pipe is provided between the horizontally extending pipe and the vertically extending pipe. The other connection port of the tee pipe is located at the connection port that cooperates with the horizontally extending pipe, and an auxiliary temperature control component for adjusting the temperature of the condensation part is provided at this connection port.

[0017] By adopting the above technical solution, a tee is provided to install the auxiliary temperature control component. During the air extraction and oil removal process, the condensation part is cooled, making it easier for the oil liquid to condense, and preventing a large amount of oil liquid from being discharged with the waste gas.

[0018] Preferably, a flange is provided on the tee. The auxiliary temperature control component includes a mounting flange and a temperature control pipe connected to the mounting flange. The temperature control pipe includes a liquid inlet pipe connected to the mounting flange, a liquid outlet pipe, and a connecting pipe connecting the liquid inlet pipe and the liquid outlet pipe.

[0019] Preferably, a positioning ring is formed at the center of the side of the mounting flange facing the flange. The outer diameter of the positioning ring is equal to the inner diameter of the tee. One end of each of the liquid inlet pipe and the liquid outlet pipe passes through the mounting flange and extends outside the mounting flange. The other ends of the liquid inlet pipe and the liquid outlet pipe are located inside the horizontal extension pipe and close to the inner walls on both sides of the upper half of the horizontal extension pipe. The two ends of the connecting pipe are respectively communicated with the ends of the liquid inlet pipe and the liquid outlet pipe located inside the horizontal extension pipe. The connecting pipe extends upward along an arc from the connection with the liquid inlet pipe and the liquid outlet pipe, and there is a gap between the outer side wall of the connecting pipe and the inner side wall of the horizontal extension pipe.

[0020] By adopting the above technical solution, during the air extraction process of the single structure working, cold water is conveyed into the temperature control pipe through the liquid inlet pipe and discharged through the liquid outlet pipe. During this process, the condensation pipe is cooled, making the oil and gas carried in the gas condense in the condensation pipe as much as possible. When there is a large amount of solid residue remaining on the inner wall of the horizontal extension pipe, resulting in a large deviation between the actual air extraction efficiency and the design value, at this time, the mounting flange can be rotated 180 degrees, so that the liquid inlet pipe, the liquid outlet pipe, and the connecting pipe are close to the bottom of the horizontal extension pipe. At this time, hot water or high-temperature gas is passed into the temperature control pipe to heat and melt the solidified matter solidified at the bottom of the horizontal extension pipe and clean it out. At the same time, the liquid inlet pipe, the liquid outlet pipe, and the connecting pipe are arranged in the upper half of the horizontal extension pipe, close to the two sides and above the pipe wall, so the influence on the central air extraction flow rate is small.

[0021] Preferably, the liquid inlet pipe, the liquid outlet pipe, and the connecting pipe are all flat pipes, and the width is greater than the height. The width direction of the liquid inlet pipe, the liquid outlet pipe, and the connecting pipe is along the length direction of the horizontal extension pipe, and the height direction of the liquid inlet pipe, the liquid outlet pipe, and the connecting pipe is along the radial direction of the horizontal extension pipe.

[0022] By adopting the above technical solution, setting the liquid inlet pipe, the liquid outlet pipe, and the connecting pipe as flat pipes reduces the influence on the flow cross-section of the horizontal extension pipe, and it is not necessary to significantly increase the diameter of the horizontal extension pipe during design.

[0023] In the second aspect, the present application provides a spunbond spinning box, adopting the following technical solution:

[0024] A spunbond spinning box, characterized in that it includes a box body and the above-mentioned monomer extraction structure. The main monomer extraction pipe of the monomer extraction structure is arranged around the box body in a circle, and the main monomer extraction pipe around the box body in a circle is inclined in one direction. An oil collector is installed at the lowest point of the main monomer extraction pipe in a detachable connection manner, and a valve for controlling the opening degree is installed on each monomer branch pipe.

[0025] By adopting the above technical solution, when the outflow fibers in a certain local area of the spinneret are thinned, by adjusting and increasing the opening degree of the valve connected to the corresponding monomer extraction structure in this area, the air extraction speed of the monomer branch pipe corresponding to this area is increased, the temperature of the spinneret surface in this area is reduced, and the limited curing of the outflow from the spinneret holes in the corresponding area is accelerated and is not easily thinned, optimizing the visual uniformity of the fabric surface.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Multiple monomer branch pipes are provided, so that the air extraction parts of the monomer branch pipes in the shape of slender plates are assembled in a fitting manner in the air extraction holes along the main monomer extraction pipe to form an entire slender air outlet. By using the slender air outlet to cooperate with air extraction, since the air outlet covers the side surface of the entire main monomer extraction pipe, the global air flow can be extracted, there will be no air flow dead corners, and oily gas can be removed better.

[0028] 2. When the outflow fibers in a certain local area of the spinneret are thinned, by adjusting and increasing the opening degree of the valve connected to the corresponding monomer extraction structure in this area, the air extraction speed of the monomer branch pipe corresponding to this area is increased, the temperature of the spinneret surface in this area is reduced, and the limited curing of the outflow from the spinneret holes in the corresponding area is accelerated and is not easily thinned, optimizing the visual uniformity of the fabric surface. Description of the Drawings

[0029] Figure 1 is the structural schematic diagram of Embodiment 1;

[0030] Figure 2 is the cross-sectional schematic diagram of Embodiment 1;

[0031] Figure 3 is the cross-sectional schematic diagram of the monomer branch pipe in Embodiment 1;

[0032] Figure 4 is the structural schematic diagram of Embodiment 2;

[0033] Figure 5 is the cross-sectional schematic diagram of Embodiment 3;

[0034] Figure 6 is the cross-sectional schematic diagram of the temperature control pipe in Embodiment 3.

[0035] Description of reference numerals: 1. Main pipe for extracting monomers; 2. Branch pipe for monomers; 3. Connecting hole; 4. Air extraction hole; 5. Air extraction part; 6. Oil collection part; 7. Condensation part; 8. Air extraction inner cavity; 9. Horizontally extending pipe; 10. Vertically extending pipe; 11. First connection area; 12. Second connection area; 13. Oil collection hole; 14. Box body; 15. Oil collector; 16. Three-way pipe; 17. Flange; 18. Auxiliary temperature control assembly; 19. Mounting flange; 20. Temperature control pipe; 21. Operating handle; 22. Positioning ring; 23. Liquid inlet pipe; 24. Liquid outlet pipe; 25. Connecting pipe. Detailed implementation manners

[0036] The following further elaborates on this application Figure 1-6 in conjunction with the attached drawings.

[0037] The embodiment of this application discloses a monomer extraction structure and a spunbond spinning box using this structure. The "upper", "lower", "left", and "right" used in the embodiment are all schematic for describing the relative directions of the position relationship, and are not limitations on the position relationship.

[0038] Embodiment 1:

[0039] As Figure 1 and Figure 2 shown, the monomer extraction structure includes a main pipe 1 for extracting monomers and multiple branch pipes 2 connected to the main pipe 1 for extracting monomers. The main pipe 1 for extracting monomers is a square pipe, and a plurality of connecting holes 3 are uniformly arranged along the length direction on one side surface of the main pipe 1 for extracting monomers. An air extraction hole 4 is provided on the surface of the main pipe 1 for extracting monomers opposite to the side surface provided with the connecting holes 3. The air extraction hole 4 is located in the middle of this side surface of the main pipe 1 for extracting monomers and extends along the length direction of the main pipe 1 for extracting monomers.

[0040] As Figure 2 shown, each branch pipe 2 for monomers includes an air extraction part 5, an oil collection part 6, and a condensation part 7. The air extraction part 5 is connected to the air extraction hole 4, and the oil collection part 6 connected to the air extraction part 5 passes through the connecting hole 3, and the oil collection part 6 and the connecting hole 3 are welded together. The outer side walls of the air extraction parts 5 of adjacent branch pipes 2 for monomers are in contact with each other. The air extraction part 5 is a slender plate-like structure with a thickness of 8 mm, and an air extraction inner cavity 8 communicating with the air extraction hole 4 is formed in the center of the air extraction part 5. The height of the air extraction inner cavity 8 is 4 mm.

[0041] As Figure 2 shown, the condensation part 7 includes a horizontally extending pipe 9 and a vertically extending pipe 10, and the horizontally extending pipe 9 and the vertically extending pipe 10 are connected by an elbow for transition. The connection end of the horizontally extending pipe 9 and the oil collection part 6 is the lower end, and the connection end of the horizontally extending pipe 9 and the elbow is the higher end.

[0042] As Figure 2 and Figure 3As shown, the oil collecting portion 6 is internally formed with a first connection area 11 connected to the exhaust portion 5, and a second connection area 12 connected to the condensation portion 7. In a top view, the outer edges of the first connection area 11 on both sides gradually tilt toward each other from the direction of the exhaust portion 5 to the direction of the second connection area 12, and the tilt angle gradually increases. In a side view, the height dimension of the outer edges of the first connection area 11 on both sides gradually decreases from the direction of the exhaust portion 5 to the direction of the second connection area 12. The lower surface of the first connection area 11 tilts downward from the direction of the exhaust portion 5 to the direction of the second connection area 12.

[0043] like Figure 2 and Figure 3 As shown, in a top view, the outer edges of both sides of the second connection area 12 gradually tilt toward each other from the first connection area 11 toward the condensation portion 7, and the tilt angle gradually decreases. In a side view, the height dimension of the second connection area 12 gradually increases from the first connection area 11 toward the condensation portion 7. And the lower side surface of the second connection area 12 tilts downward from the first connection area 11 toward the condensation portion 7. The lower side wall of the oil collecting portion 6 is formed with an oil collecting hole 13 connected to the second connection area 12 near the condensation portion 7. The oil collecting hole 13 is an elongated hole, and the length direction of the oil collecting hole 13 is along the circumferential direction of the oil collecting portion 6. The circumferential arc of the oil collecting portion 6 covered by the oil collecting hole 13 is less than or equal to π / 2.

[0044] Specific use process:

[0045] When air is extracted through the monomer extraction structure, the oily gas released after the polymer melt flows out of the spinneret is carried by the air flow and passes through the exhaust section 5, the oil collecting section 6 and the condensation section 7 in sequence, and condenses into oil liquid on the inner wall of the pipe of the condensation section 7 and then gathers into the oil collecting section 6, and is finally discharged from the oil collecting hole 13 to the monomer extraction main pipe 1 for collection, so as to avoid the oil and gas condensing on the spinneret and thus affecting the spinning.

[0046] In addition to removing oil, the monomer extraction structure also has a regulating function for the fibers under the spinneret. When the outflowing fibers in a certain local area of the spinneret are thinned and the visual uniformity of the product fabric is not ideal, the suction speed of the monomer branch pipe 2 adjacent to the corresponding area can be increased. The flow rate of the airflow under the spinneret through the monomer branch pipe 2 will be greater than that of other surrounding monomer branches 2. The greater the suction flow rate of the monomer branch pipe 2, the lower the temperature of the spinneret surface, and thus the worse the fluidity of the polymer melt. This will cause the fibers flowing out of the spinneret holes in the corresponding area to solidify quickly and not be easily thinned, thereby achieving visual uniformity control of the fabric surface.

[0047] Embodiment 2:

[0048] like Figure 4As shown in the figure, the spunbond spinning box includes a box body 14 and the monomer extraction structure described in the first embodiment. The main monomer extraction pipe 1 of the monomer extraction structure is arranged around the box body 14 in a circle, and the main monomer extraction pipe 1 around the box body 14 in a circle is inclined in one direction. An oil collector 15 is installed at the lowest point of the main monomer extraction pipe 1 in a detachable connection manner. A valve for controlling the opening degree is installed on each monomer branch pipe 2.

[0049] When the outflow fibers in a certain local area of the spinneret are thinned, by adjusting and increasing the opening degree of the valve connected to the corresponding monomer extraction structure in this area, the air extraction speed of the monomer branch pipe 2 corresponding to this area is increased, the temperature of the spinneret surface in this area is reduced, and the limited curing of the outflow from the spinneret holes in the corresponding area is accelerated and is not easily thinned, optimizing the visual uniformity of the cloth surface.

[0050] Embodiment 3:

[0051] As Figure 5 shown, the difference between the monomer branch pipe 2 of this embodiment and that of the first embodiment is that the horizontal extension pipe 9 and the vertical extension pipe 10 of the condensation part 7 are connected through a tee pipe 16. The other connection port of the tee pipe 16 is located at the connection port that cooperates with the horizontal extension pipe 9, and a flange 17 is welded at this connection port, and an auxiliary temperature control component 18 is installed through the flange 17.

[0052] As Figure 5 and Figure 6As shown in the figure, the auxiliary temperature control component 18 includes a mounting flange 19 and a temperature control pipe 20 connected to the mounting flange 19. The mounting flange 19 is used to cooperate and connect with the flange 17 and is fixedly locked by bolts. A sealing ring is provided between the mounting flange 19 and the flange 17 to form a sealing surface after the bolts are locked. An operation handle 21 is fixed on the side of the mounting flange 19 facing away from the flange 17. A positioning ring 22 is formed at the center of the side of the mounting flange 19 facing the flange 17. The outer diameter of the positioning ring 22 is equal to the inner diameter of the three-way pipe 16, and the two are loosely fitted, that is, the allowable error of the machining accuracy of the outer diameter of the positioning ring 22 is negative, and the allowable error of the machining accuracy of the inner diameter of the three-way pipe 16 is positive. The wall thickness of the positioning ring 22 gradually decreases from the connection end with the mounting flange 19 in the direction away from the mounting flange 19. The temperature control pipe 20 includes a liquid inlet pipe 23, a liquid outlet pipe 24 connected to the mounting flange 19, and a connecting pipe 25 connecting the liquid inlet pipe 23 and the liquid outlet pipe 24. One ends of the liquid inlet pipe 23 and the liquid outlet pipe 24 both pass through the mounting flange 19 and extend outside the mounting flange 19, and the other ends of the liquid inlet pipe 23 and the liquid outlet pipe 24 are located in the horizontal extension pipe 9 and are close to the inner walls on both sides of the upper half of the horizontal extension pipe 9. The two ends of the connecting pipe 25 are respectively communicated with the ends of the liquid inlet pipe 23 and the liquid outlet pipe 24 located in the horizontal extension pipe 9. The connecting pipe 25 extends upward along an arc from the connection with the liquid inlet pipe 23 and the liquid outlet pipe 24, and the extension radius of the connecting pipe 25 is slightly smaller than the inner radius of the horizontal extension pipe 9. There is a gap of 5-10 mm between the outer side wall of the connecting pipe 25 and the inner side wall of the horizontal extension pipe 9. The liquid inlet pipe 23, the liquid outlet pipe 24, and the connecting pipe 25 are all flat pipes, and the width is greater than the height. The width direction of the liquid inlet pipe 23, the liquid outlet pipe 24, and the connecting pipe 25 is along the length direction of the horizontal extension pipe 9, and the height direction of the liquid inlet pipe 23, the liquid outlet pipe 24, and the connecting pipe 25 is along the radial direction of the horizontal extension pipe 9.

[0053] Specific usage process:

[0054] During the process of the single-body structure working and pumping air, cold water / condensate is conveyed into the temperature control pipe 20 through the liquid inlet pipe 23 and discharged through the liquid outlet pipe 24. During this process, the inside of the condensing pipe is cooled, so that the oil and gas carried in the gas condense in the condensing pipe and do not need to be discharged from the exhaust pipe in large quantities.

[0055] The oily gas released after the polymer melt flows out of the spinneret includes long-chain saturated fatty acids and their esters, and high-boiling benzene series. Solid residues will be formed on the inner wall of the horizontal extension pipe 9. Long-term and large accumulation will cause the ventilation cross-section to shrink and affect the air extraction effect. At this time, the mounting flange 19 can be rotated 180 degrees so that the liquid inlet pipe 23, the liquid outlet pipe 24, and the connecting pipe 25 are close to the bottom of the horizontal extension pipe 9. At this time, hot water or high-temperature gas is introduced into the temperature control pipe 20 to heat and melt the solidified matter at the bottom of the horizontal extension pipe 9 and clean it out.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A monomer extraction structure, comprising a main monomer extraction pipe (1) and multiple monomer branch pipes (2) connected to the main monomer extraction pipe (1), characterized in that, The side of the main monomer extraction pipe (1) is provided with air extraction holes (4) that penetrate the side wall of the main monomer extraction pipe (1) along the length direction of the main monomer extraction pipe (1). Each monomer branch pipe (2) includes an air extraction part (5), an oil collection part (6), and a condensation part (7). The air extraction part (5) is in the shape of a slender plate and is connected to the air extraction hole (4). The outer side walls of the air extraction parts (5) of adjacent monomer branch pipes (2) are in contact with each other. An air extraction inner cavity (8) communicating with the air extraction hole (4) is formed in the center of the air extraction part (5); a first connection area (11) connected to the air extraction part (5) and a second connection area (12) connected to the condensation part (7) are formed inside the oil collection part (6); the outer edges of both sides of the second connection area (12) gradually incline towards each other from the first connection area (11) towards the condensation part (7) in the top view, and the inclination angle gradually decreases; the height dimension of the second connection area (12) gradually increases from the first connection area (11) towards the condensation part (7) in the side view; the lower side surface of the second connection area (12) inclines downwards from the first connection area (11) towards the condensation part (7); the condensation part (7) includes a horizontally extending pipe (9) communicating with the oil collection part (6). The connection end of the horizontally extending pipe (9) and the oil collection part (6) is the lower end. An oil collection hole (13) communicating with the second connection area (12) is formed at a position on the lower side wall of the oil collection part (6) close to the condensation part (7).

2. The monomer extraction structure according to claim 1, characterized in that, The outer edges of both sides of the first connection area (11) gradually incline towards each other from the air extraction part (5) towards the second connection area (12) in the top view, and the inclination angle gradually increases; the height dimensions of the outer edges of both sides of the first connection area (11) gradually decrease from the air extraction part (5) towards the second connection area (12) in the side view, and the lower surface of the first connection area (11) inclines downwards from the air extraction part (5) towards the second connection area (12).

3. The monomer extraction structure according to claim 2, wherein The condensation part (7) further includes a vertically extending pipe (10).

4. The monomer extraction structure according to claim 3, characterized in that, The oil collection hole (13) is an elongated hole, and the length direction of the oil collection hole (13) is along the circumferential direction of the oil collection part (6). The circumferential radian of the oil collection part (6) covered by the oil collection hole (13) is less than or equal to π / 2.

5. The monomer extraction structure according to claim 4, characterized in that, A three-way pipe (16) communicating with both of them is provided between the horizontally extending pipe (9) and the vertically extending pipe (10). Another connection port of the three-way pipe (16) is located at the connection port matching the horizontally extending pipe (9), and an auxiliary temperature control component (18) for adjusting the temperature of the condensation part (7) is provided at this connection port.

6. The monomer extraction structure according to claim 5, characterized in that, A flange plate (17) is provided on the three-way pipe (16). The auxiliary temperature control component (18) includes a mounting flange (19) and a temperature control pipe (20) connected to the mounting flange (19). The temperature control pipe (20) includes a liquid inlet pipe (23) connected to the mounting flange (19), a liquid outlet pipe (24), and a connecting pipe (25) connecting the liquid inlet pipe (23) and the liquid outlet pipe (24).

7. The monomer extraction structure according to claim 6, characterized in that, A positioning ring (22) is formed at the center of the side of the mounting flange (19) facing the flange plate (17), and the outer diameter of the positioning ring (22) is equal to the inner diameter of the tee pipe (16); one ends of the liquid inlet pipe (23) and the liquid outlet pipe (24) both pass through the mounting flange (19) and extend outside the mounting flange (19), and the other ends of the liquid inlet pipe (23) and the liquid outlet pipe (24) are located inside the horizontal extension pipe (9) and close to the positions of the inner walls on both sides of the upper half of the horizontal extension pipe (9). Both ends of the connecting pipe (25) are respectively communicated with the ends of the liquid inlet pipe (23) and the liquid outlet pipe (24) located inside the horizontal extension pipe (9). The connecting pipe (25) extends upward along an arc from the connection with the liquid inlet pipe (23) and the liquid outlet pipe (24), and a gap is left between the outer side wall of the connecting pipe (25) and the inner side wall of the horizontal extension pipe (9).

8. The monomer extraction structure according to claim 7, characterized in that, The liquid inlet pipe (23), the liquid outlet pipe (24), and the connecting pipe (25) are all flat pipes, and the width is greater than the height. The width directions of the liquid inlet pipe (23), the liquid outlet pipe (24), and the connecting pipe (25) are along the length direction of the horizontal extension pipe (9), and the height directions of the liquid inlet pipe (23), the liquid outlet pipe (24), and the connecting pipe (25) are along the radial direction of the horizontal extension pipe (9).

9. A spunbond spinning box, characterized in that, It includes a box body (14) and the monomer extraction structure according to any one of claims 1-8. The monomer extraction main pipe (1) of the monomer extraction structure is arranged around the box body (14) in a circle, and the monomer extraction main pipe (1) arranged around the box body (14) in a circle is inclined in one direction. An oil collector (15) with detachable connection is installed at the lowest point of the monomer extraction main pipe (1). A valve for controlling the opening degree is installed on each monomer branch pipe (2).

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