PP melt-blown material cooling roller

Abstract

The utility model relates to the technical field of cooling rollers, in particular to a PP melt-blown material cooling roller which comprises a cooling roller body, a water inlet end and a water outlet end which are arranged at two ends of the cooling roller body respectively, and a group of cooling-water machines, one end of a water outlet of each cooling-water machine is connected with the water inlet end through a water supply pipe, and one end of the water outlet end is connected with a drainage pipe. The cooling roller body is provided with a first cavity, a second cavity and a third cavity from inside to outside. Cooling water flowing into the cooling roller body dispersedly flows into the third cavity on the outermost layer from the first cavity on the inner layer, then exchanges heat with the polypropylene non-woven fabric, dispersedly flows into the second cavity on the middle layer and then is discharged; the cooling water does not exchange heat with the polypropylene non-woven fabric in the process of flowing in the axial direction of the cooling roller body, large temperature difference can be effectively prevented from being generated on the surfaces of the two ends of the cooling roller body, and the polypropylene non-woven fabric attached to the outer surface of the cooling roller body can be evenly cooled.

Description

Technical Field

[0001] This utility model relates to the field of cooling roller technology, and more specifically, to a PP meltblown material cooling roller. Background Technology

[0002] PP meltblown material is based on polypropylene. By adding various additives and using controlled rheology methods, the fluidity and molecular weight distribution of the resin are improved. It is particularly suitable for meltblown nonwoven fabric molding process and is the main raw material for producing polypropylene meltblown nonwoven fabric products. In the production of polypropylene meltblown nonwoven fabric, cooling rollers are usually used to cool it down to prevent the polypropylene nonwoven fabric from deforming or being damaged in a high-temperature environment and to ensure its molding quality.

[0003] Existing cooling rollers typically have a spiral flow channel inside, allowing cooling water to flow spirally along the roller's axis. During this flow, the cooling water exchanges heat with the polypropylene nonwoven fabric in contact with it, causing the water temperature to gradually rise. When the cooling roller is long, this can lead to a large temperature difference between the two ends, resulting in uneven cooling of the polypropylene nonwoven fabric. Furthermore, cooling rollers are usually supplied with water by a chiller, but existing cooling rollers typically lack the ability to monitor and regulate the water temperature. During use, the cooling water from the chiller usually enters the cooling roller at a constant temperature, making it difficult to flexibly adjust the water temperature according to the temperature of the polypropylene nonwoven fabric. This results in poor cooling effect on the polypropylene nonwoven fabric or waste of chiller energy. Utility Model Content

[0004] This invention provides a PP meltblown material cooling roller, which solves the technical problems of uneven cooling effect on polypropylene nonwoven fabric and lack of water temperature monitoring and adjustment function in the prior art, resulting in poor cooling effect on polypropylene nonwoven fabric or waste of chiller energy consumption.

[0005] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0006] A PP meltblown material cooling roller includes a cooling roller body with an inlet and an outlet at both ends, and a chiller. The outlet of the chiller is connected to the inlet via a water supply pipe, and the outlet is connected to a drain pipe. The cooling roller body has a first cavity, a second cavity, and a third cavity arranged from the inside out. The inlet is connected to one end of the first cavity inside the cooling roller body. The cooling roller body has several sets of first branch pipes inside, with both ends of each branch pipe connected between the first cavity and the third cavity. The cooling roller body also has several sets of second branch pipes inside, with both ends of each second branch pipe connected between the third cavity and the second cavity. The outlet is connected to one end of the second cavity inside the cooling roller body.

[0007] Furthermore, a rotary joint is provided at the connection between the water inlet and the water supply pipe, and at the connection between the water outlet and the drain pipe.

[0008] Furthermore, several groups of the first branch pipes are arranged side by side around the first cavity and the third cavity, and several groups of the second branch pipes are arranged side by side around the third cavity and the second cavity. The interior of the third cavity is provided with several groups of partition plates, which are spaced apart between the first branch pipes and the second branch pipes.

[0009] Furthermore, the outer end of the second branch extends radially toward the cooling roller body in the third cavity and is close to the outer wall of the cooling roller body.

[0010] Furthermore, a first heat insulation layer is provided between the first cavity and the second cavity, and a second heat insulation layer is provided between the second cavity and the third cavity.

[0011] Furthermore, a temperature sensor is installed in the drain pipe, which is electrically connected to the temperature controller on the chiller.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) The cooling water flowing into the cooling roller body is dispersed from the first cavity of the inner layer to the third cavity of the outermost layer and then exchanges heat with the polypropylene nonwoven fabric. After being dispersed into the second cavity located in the middle layer, it is discharged. This means that the cooling water does not exchange heat with the polypropylene nonwoven fabric while flowing along the axial direction of the cooling roller body. Therefore, it can effectively avoid a large temperature difference between the two ends of the cooling roller body, so that the polypropylene nonwoven fabric that is attached to the outer surface of the cooling roller body can be uniformly cooled.

[0014] (2) The temperature of the outflowing coolant is monitored in real time by the temperature sensor on the drain pipe and the data is transmitted to the temperature controller on the chiller. When the monitored water temperature is higher than the preset temperature, it means that the temperature of the polypropylene nonwoven fabric is high. At this time, the temperature controller lowers the water temperature inside the chiller to ensure the cooling effect on the polypropylene nonwoven fabric. When the monitored water temperature is lower than the preset temperature, it means that the temperature of the polypropylene nonwoven fabric is low. At this time, the temperature controller raises the water temperature inside the chiller by reducing energy consumption. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the cooling roller body and the first branch pipe in this utility model;

[0018] Figure 3 This is a cross-sectional view of the cooling roller body and the second branch pipe in this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the second branch pipe and the partition plate in this utility model.

[0020] In the diagram: 1. Cooling roller body; 2. Water inlet; 3. Water outlet; 4. Chiller; 5. Water supply pipe; 6. Drain pipe; 7. First cavity; 8. Second cavity; 9. Third cavity; 10. First branch pipe; 11. Second branch pipe; 12. Rotary joint; 13. Partition plate; 14. First insulation layer; 15. Second insulation layer; 16. Temperature sensor. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] Example 1

[0024] Please see Figure 1-4 A PP meltblown material cooling roller includes a cooling roller body 1, with an inlet end 2 and an outlet end 3 at both ends of the cooling roller body 1. It also includes a chiller 4, with one end of the chiller 4 connected to the inlet end 2 via a water supply pipe 5, and one end of the outlet end 3 connected to a drain pipe 6. Cooling water generated by the chiller 4 flows into the cooling roller body 1 through the water supply pipe 5 and the inlet end 2, and flows out of the cooling roller body 1 through the outlet end 3 and the drain pipe 6. Rotary joints 12 are provided at the connection points between the water supply pipe 5 and the water outlet 3 and the drain pipe 6. When the water supply pipe 5 and the drain pipe 6 are fixedly installed on the bracket, the cooling roller body 1 can rotate under the drive of the motor. At this time, the water inlet 2 and the water outlet 3 at both ends of the cooling roller body 1 are not restricted by the water supply pipe 5 and the drain pipe 6 when rotating. The cooling roller body 1 is provided with a first cavity 7, a second cavity 8 and a third cavity 9 from the inside to the outside. The water inlet 2 is connected to the first cavity 9 inside the cooling roller body 1. At one end of cavity 7, the coolant flowing into the cooling roller body 1 from the water inlet 2 is concentrated in the first cavity 7 inside the cooling roller body 1. The cooling roller body 1 is provided with several sets of first branch pipes 10. The two ends of the first branch pipes 10 are connected between the first cavity 7 and the third cavity 9. The coolant flowing into the first cavity 7 is dispersed into the third cavity 9 through the first branch pipes 10. Since the third cavity 9 is close to the outside of the cooling roller body 1, the coolant flowing into the third cavity 9 can exchange heat with the polypropylene nonwoven fabric in contact with the outer surface of the cooling roller body 1. The cooling roller body 1 is also provided with several sets of second branch pipes 11. The two ends of the second branch pipes 11 are connected between the third cavity 9 and the second cavity 8, respectively. The coolant exchanged inside the third cavity 9 is dispersed into the second cavity 8 through the second branch pipes 11. The water outlet 3 is connected to one end of the second cavity 8 inside the cooling roller body 1. The coolant flowing into the second cavity 8 will eventually flow out of the outside of the cooling roller body 1 through the water outlet 3.

[0025] During use, the polypropylene nonwoven fabric is adhered to the surface of the cooling roller body 1. Cooling water generated by the chiller 4, under the action of the pump, flows through the water supply pipe 5 and the inlet 2 into the first cavity 7, the innermost layer of the cooling roller body 1. This causes the cooling water to accumulate inside the first cavity 7. The cooling water concentrated in the first cavity 7 is then dispersed through several sets of first branch pipes 10 into the third cavity 9, the outermost layer of the cooling roller body 1. When the cooling water passes through the third cavity 9, it directly exchanges heat with the polypropylene nonwoven fabric attached to the surface of the cooling roller body 1, thereby cooling the polypropylene nonwoven fabric. The cooled water, after heat exchange, flows through several sets of second branch pipes 1... The cooling water flows dispersed from the inside of the third cavity 9 into the second cavity 8, and finally flows out through the water outlet 3 and the drain pipe 6 to the outside of the cooling roller body 1. In the above process, since the cooling water in the cooling roller body 1 is dispersed from the inner first cavity 7 to the outermost third cavity 9 and then exchanges heat with the polypropylene nonwoven fabric, and is discharged after being dispersed into the second cavity 8 located in the middle layer, the cooling water does not exchange heat with the polypropylene nonwoven fabric during the process of flowing along the axial direction of the cooling roller body 1. Therefore, it can effectively avoid the generation of a large temperature difference on the two ends of the cooling roller body 1, so that the polypropylene nonwoven fabric that is attached to the outer surface of the cooling roller body 1 can receive a uniform cooling effect.

[0026] For further details, please refer to Figure 1-4 Several sets of first branch pipes 10 are arranged side by side around the first cavity 7 and the third cavity 9, and several sets of second branch pipes 11 are arranged side by side around the third cavity 9 and the second cavity 8. Several sets of partition plates 13 are provided inside the third cavity 9. The partition plates 13 are spaced between the first branch pipes 10 and the second branch pipes 11, which ensures that the cooling water can flow evenly from the first cavity 7 to the third cavity 9 through the first branch pipes 10, and then flow evenly from the third cavity 9 to the second cavity 8 through the second branch pipes 11. When the cooling water is inside the third cavity 9, the partition plates 13 can further prevent it from flowing along the axial direction of the cooling roller body 1, which further ensures that the cooling water in the third cavity 9 can evenly exchange heat with the polypropylene nonwoven fabric.

[0027] For further details, please refer to Figure 1-4 The outer end of the second branch pipe 11 extends radially toward the cooling roller body 1 in the third cavity 9 and is close to the outer wall of the cooling roller body 1. Since the coolant inside the third cavity 9 is discharged from the third cavity 9 through the outer end of the second branch pipe 11, the outer end of the second branch pipe 11 extending radially toward the cooling roller body 1 can ensure that the coolant can fill the third cavity 9 before flowing out from the third cavity 9, so that the coolant in the third cavity 9 can fully contact the outer wall of the cooling roller body 1, thereby ensuring the cooling effect on the polypropylene nonwoven fabric.

[0028] For further details, please refer to Figure 1-4 A first heat insulation layer 14 is provided between the first cavity 7 and the second cavity 8, and a second heat insulation layer 15 is provided between the second cavity 8 and the third cavity 9. The first heat insulation layer 14 and the second heat insulation layer 15 can respectively prevent the heat exchange between the coolant in the first cavity 7, the second cavity 8 and the third cavity 9, thus ensuring the cooling effect of the coolant in the third cavity 9.

[0029] Example 2

[0030] For further details, please refer to Figure 1 A temperature sensor 16 is installed in the drain pipe 6, which is electrically connected to the temperature controller on the chiller 4. The cooling water generated by the chiller 4 cools the polypropylene nonwoven fabric attached to the cooling roller body 1 after passing through the cooling roller body 1. The cooled water flows out from the drain pipe 6. The temperature sensor 16 on the drain pipe 6 monitors the temperature of the flowing coolant in real time and transmits the data to the temperature controller on the chiller 4. When the monitored water temperature is higher than the preset temperature, it indicates that the temperature of the polypropylene nonwoven fabric is high. At this time, the temperature controller lowers the water temperature inside the chiller 4 to ensure the cooling effect on the polypropylene nonwoven fabric. When the monitored water temperature is lower than the preset temperature, it indicates that the temperature of the polypropylene nonwoven fabric is low. At this time, the temperature controller raises the water temperature inside the chiller 4 by reducing energy consumption.

[0031] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A PP meltblown material cooling roller, comprising a cooling roller body (1), wherein the cooling roller body (1) is provided with a water inlet (2) and a water outlet (3) at both ends, and further comprising a set of chillers (4), wherein one end of the water outlet of the chiller (4) is connected to the water inlet (2) through a water supply pipe (5), and one end of the water outlet (3) is connected to a drain pipe (6), characterized in that, The cooling roller body (1) is provided with a first cavity (7), a second cavity (8) and a third cavity (9) from the inside to the outside. The water inlet (2) is connected to one end of the first cavity (7) inside the cooling roller body (1). The cooling roller body (1) is provided with a number of first branch pipes (10). The two ends of the first branch pipes (10) are connected between the first cavity (7) and the third cavity (9). The cooling roller body (1) is also provided with a number of second branch pipes (11). The two ends of the second branch pipes (11) are connected between the third cavity (9) and the second cavity (8) respectively. The water outlet (3) is connected to one end of the second cavity (8) inside the cooling roller body (1).

2. The PP meltblown material cooling roller according to claim 1, characterized in that, Rotary joints (12) are provided at the connection between the water inlet (2) and the water supply pipe (5) and at the connection between the water outlet (3) and the drain pipe (6).

3. The PP meltblown material cooling roller according to claim 1, characterized in that, Several sets of first branch pipes (10) are arranged side by side around the first cavity (7) and the third cavity (9), and several sets of second branch pipes (11) are arranged side by side around the third cavity (9) and the second cavity (8). The interior of the third cavity (9) is provided with several sets of partition plates (13), and the partition plates (13) are spaced apart between the first branch pipes (10) and the second branch pipes (11).

4. The PP meltblown material cooling roller according to claim 1, characterized in that, The outer end of the second branch pipe (11) extends radially toward the cooling roller body (1) in the third cavity (9) and is close to the outer wall of the cooling roller body (1).

5. The PP meltblown material cooling roller according to claim 1, characterized in that, A first heat insulation layer (14) is provided between the first cavity (7) and the second cavity (8), and a second heat insulation layer (15) is provided between the second cavity (8) and the third cavity (9).

6. The PP meltblown material cooling roller according to claim 1, characterized in that, A temperature sensor (16) is installed in the drain pipe (6), which is electrically connected to the temperature controller on the chiller (4).

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