Impingement hot air flow module and through-air dryer and method

Abstract

The application discloses a variable-impact hot air flow module, a hot air penetration paper machine and a method, and relates to the technical field of hot air penetration. The variable-impact hot air flow module comprises an outer shell, a hot air outlet body, and a reciprocating movement of the hot air outlet body in the sliding channel. The multiple hot air outlet bodies can alternately move, and the air outlet distance of each hot air outlet body can be changed. In combination with the multiple simultaneous movements, the variable-impact hot air fluctuation can be met. The variable-impact hot air penetration paper machine comprises a paper surface conveying part and a moisture collecting part. The conveying surface of the paper surface conveying part is provided with the variable-impact hot air flow module. The movement speed of the hot air outlet body is switched by controlling the driving mechanism, the intensity of the hot air impact is changed, different numbers of hot air outlet bodies are arranged, or different positions are matched in combination with the traditional hot air penetration structure, and the performance of the hot air impact is changed.

Description

Technical Field

[0001] This invention relates to the field of hot air penetration technology, and more specifically to a variable impact hot air flow module, a hot air penetration paper machine, and a method. Background Technology

[0002] In the papermaking process, pulp needs to be dewatered to facilitate pulp formation. However, existing pulp dewatering devices use centrifugal force to squeeze the pulp and rotate the wire at high speed to dewater it, and the white water is discharged into the white water tank. At the same time, some water still exists in the pulp, so it needs to be dewatered a second time, which results in slow work efficiency.

[0003] To improve the quality of tissue paper, Procter & Gamble developed a hot air penetration drying technology that minimizes paper web compression. This technology involves drawing wet paper sheets onto a structured fabric that imparts a three-dimensional structure to the paper. The paper web and structured fabric are then conveyed together onto a large, porous roller, where hot, drying air at temperatures up to 350°C passes through both the fabric and the paper web, thus drying the paper web.

[0004] When the paper web is transferred from the perforated rollers to the Yankee dryer, it already has a high degree of dryness. Only 25% of the paper web is compressed on the Yankee dryer, whereas in traditional dry creping processes, the paper web is 100% compressed. Therefore, the tissue paper products produced by this new technology have high softness, bulk, and absorbency. The processed tissues can absorb 15 times their own weight in water, while the absorbency of traditional tissue paper products is only half of that, making this machine a mainstream model worldwide.

[0005] With the continuous development of hot air penetration technology, there is an ongoing pursuit of paper processing with higher softness, bulk, and absorbency. In existing hot air penetration technology, hot air drying is an important core process. Continuously upgrading the effect of hot air in order to improve its processing effect is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a transforming impact hot air flow module and a hot air penetration paper machine and method, aiming to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A transforming impingement hot airflow module, comprising:

[0009] An outer shell, wherein one side of the outer shell has an opening, and the inner wall of the outer shell is divided into a plurality of sliding channels by a partition, wherein each of the plurality of sliding channels corresponds to the opening;

[0010] The hot air outlets are provided in a number that is the same as the number of sliding channels. Each hot air outlet is slidably disposed within a sliding channel. Each hot air outlet has a hot air outlet on the side facing the opening, and a hot air supply pipe is connected to the other side of the hot air outlet. The distance between the plane containing the hot air outlet of each hot air outlet and the plane containing the opening is not equal.

[0011] A drive mechanism is mounted on the outer casing, and the power output end of the drive mechanism is connected to the side of the plurality of hot air outlets away from their hot air outlets. The drive mechanism can simultaneously drive the plurality of hot air outlets to reciprocate linearly within the sliding channel.

[0012] Through the above technical solution, the present invention provides a hot air penetration structure that can realize the variation of hot air blowing impact force. By utilizing the reciprocating motion of the hot air outlet body in the sliding channel, multiple hot air outlet bodies can move alternately, thereby allowing the air outlet distance of each hot air outlet body to vary. At the same time, the coordinated movement of multiple bodies can satisfy the impact-type hot air wave, thus changing the traditional single hot air blowing operation and proposing a diversified hot air blowing form. Under the action of hot air shock wave, the drying effect of the paper tape to be dried is better, which is conducive to improving softness, bulk and absorbency.

[0013] Preferably, in the aforementioned transforming impact hot air flow module, the drive mechanism is a crank-connecting rod structure with an electric motor as the driving force. To simplify the structure and improve its feasibility, this invention employs a crank-connecting rod structure with an electric motor as the driving force. It should be noted that this invention uses the same crank-connecting rod structure found in four-stroke internal combustion engines in the automotive field. The only difference is that while a four-stroke internal combustion engine uses the piston's movement to drive the crank-connecting rod structure and then outputs power, this invention operates in reverse, using an electric motor to provide the crank-connecting rod structure with the necessary power to drive the hot air outlet.

[0014] Preferably, in the above-mentioned transforming impact hot airflow module, each of the sliding channels is provided with a crank-connecting rod structure, and the power of multiple crank-connecting rod structures is connected in series. Each crank-connecting rod structure includes a cam one, a cam two, and a crank. The support shafts of the cam one and the cam two are respectively rotatably connected to the two side walls of the sliding channel. One end of the crank is hinged to the hot air outlet body, and the other end of the crank is rotatably connected between the cam one and the cam two via a pin. This invention uses a partition as the support body for the support shaft, replacing the bearing seat, and allows the bearing to be directly installed on the partition for connecting the support shaft.

[0015] Preferably, in the above-mentioned transforming impact hot airflow module, the motor is fixed to the inner wall of the outer casing, and the power output shaft of the motor extends through the outer casing, with a drive pulley fixed at its end; the support shafts at one end of the multiple series-connected crank-connecting rod structures extend through the outer casing, with driven pulleys fixed at their ends; a transmission belt is fitted between the drive pulley and the driven pulley. Power is transmitted via a belt, resulting in a simple structure and stable and reliable power transmission.

[0016] Preferably, in the aforementioned transforming impact hot air flow module, the crank on each hot air outlet is connected to the center of its top surface, and each hot air outlet is connected to two hot air supply pipes, which are symmetrically arranged on both sides of the crank. The connection positions of the hot air outlet, crank, and hot air supply pipes are reasonable and can reasonably avoid mutual interference during operation.

[0017] Preferably, in the above-mentioned transforming impact hot air flow module, a main interface is installed on the side wall of the outer shell away from the opening, and the main interface is connected to multiple hot air supply pipes.

[0018] Preferably, in the aforementioned transforming impact hot air flow module, a pressure sensor is installed inside the hot air outlet. By installing a pressure sensor inside the hot air outlet, the hot air pressure can be monitored, resulting in a stronger intelligent adjustment effect.

[0019] Preferably, in the aforementioned alternating impact hot air flow module, the distance between the plane containing the hot air outlets of the multiple hot air outlets and the plane containing the openings increases or decreases sequentially. By designing a regular arrangement of the multiple hot air outlets, a regular pattern can be achieved under irregular movements, providing more adjustable space.

[0020] The present invention also provides a transforming impact hot air permeation paper machine, comprising:

[0021] The paper conveying unit is used to convey the paper tape that needs to be dried. The conveying surface of the paper conveying unit is provided with the above-mentioned changing impact hot air flow module, and the hot air outlets of the multiple hot air outlets are directed towards the paper tape that needs to be dried during the conveying process.

[0022] A moisture collection unit is provided on the side of the paper conveying unit facing away from the hot air outlet. The moisture collection unit is used to collect the moisture separated during the paper tape drying process.

[0023] Through the above technical solution, the present invention provides a variable impact hot air penetrating paper machine based on the above hot air impact structure. With the setting of the paper surface conveying part and the moisture collection part, a complete paper strip drying structure is formed. Since the effect of hot air blowing is different from that of traditional stable hot air, the continuous impact of hot air can have a stronger effect on the paper strip.

[0024] It should be noted that the principle of this invention can be compared with blowing air on a piece of paper placed on a table. By controlling the amount of air blowing, the distance can be simulated. It can be found that the paper will fluctuate due to the change in force during the blowing process. This fluctuation can be used to enhance the effect of hot air impact on the paper. At the same time, the fluctuation of the paper means that the paper is not constantly being pressed through, but has a certain degree of self-floating, which is beneficial to improving the paper's flexibility.

[0025] This invention also provides a method for alternating impact hot air penetration, employing the aforementioned alternating impact hot air penetration paper machine, specifically including:

[0026] By controlling the drive mechanism to switch the movement speed of the hot air outlet, the intensity of the hot air impact can be varied.

[0027] By setting different numbers of the hot air outlets, or by matching different positions with a traditional hot air penetration structure, the performance variation of hot air impact can be achieved.

[0028] Based on the above technical solution, this invention provides a method for alternating impact hot air penetration, which can be adaptively adjusted according to usage requirements, or experimentally adjusted by changing the movement speed of different hot air outlets, or setting different numbers and arranging them in different positions. It can also be combined with traditional structures to meet different usage requirements.

[0029] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a changing impact hot air flow module and a hot air penetration paper machine and method, which have the following beneficial effects:

[0030] 1. This invention provides a hot air penetration structure that can realize changes in the impact force of hot air blowing. By utilizing the reciprocating motion of the hot air outlet body in the sliding channel, multiple hot air outlet bodies can move alternately, thereby changing the air outlet distance of each hot air outlet body. At the same time, the coordinated movement of multiple bodies can satisfy the impact-type hot air wave, thus changing the traditional single hot air blowing operation and proposing a diversified hot air blowing form. Under the action of hot air shock wave, the drying effect of the paper tape to be dried is better, which is conducive to improving softness, bulk and absorbency.

[0031] 2. Based on the above hot air impact structure, the present invention provides a variable impact hot air penetrating paper machine, which, together with the paper conveying section and the moisture collection section, forms a complete paper strip drying structure. Since the effect of the hot air blowing is different from that of the traditional stable hot air, the continuous impact of the hot air can have a stronger effect on the paper strip.

[0032] 3. Based on the above device structure, the present invention provides a method for alternating impact hot air penetration, which can be adaptively adjusted according to usage requirements, or experimentally adjusted by changing the movement speed of different hot air outlets, or setting different numbers and arranging them in different positions. It can also be combined with traditional structures to meet different usage requirements. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 The attached figure is a schematic diagram of the external structure of the transforming impact hot airflow module according to Embodiment 1 of the present invention;

[0035] Figure 2 The attached figure is a schematic diagram of the internal structure of the transformation impact hot airflow module of Embodiment 1 provided by the present invention;

[0036] Figure 3 The attached figure is a front view of the internal structure of the transformation impact hot airflow module of Embodiment 1 provided by the present invention;

[0037] Figure 4 The attached figure is a schematic diagram of the transforming impact hot air penetrating paper machine of Embodiment 2 provided by the present invention;

[0038] Figure 5 The attached figure is a schematic diagram of the transforming impact hot air penetrating paper machine of Embodiment 3 provided by the present invention;

[0039] Figure 6 The attached figure is a schematic diagram of the transforming impact hot air penetrating paper machine of Embodiment 4 provided by the present invention.

[0040] in:

[0041] 1-Outer shell;

[0042] 11-Opening; 12-Partition; 13-Sliding channel; 14-Main interface;

[0043] 2-Hot air outlet;

[0044] 21-Hot air outlet; 22-Hot air supply pipe;

[0045] 3-Drive mechanism;

[0046] 31-Motor; 32-Crank and connecting rod structure; 321-Cam 1; 322-Cam 2; 323-Crank; 324-Support shaft; 33-Driving pulley; 34-Driven pulley; 35-Drive belt;

[0047] 4-Paper conveying section;

[0048] 5-Moisture collection section;

[0049] 6-Paper tape;

[0050] 7-Traditional hot air hood. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Example 1:

[0053] See appendix Figure 1 To be continued Figure 3 This invention discloses a transforming impingement hot airflow module, comprising:

[0054] The outer shell 1 has an opening 11 on one side. The inner wall of the outer shell 1 is divided into multiple sliding channels 13 by a partition 12, and each of the multiple sliding channels 13 corresponds to the opening 11.

[0055] The number of hot air outlets 2 is the same as the number of sliding channels 13, and the multiple hot air outlets 2 are slidably disposed in the sliding channels 13. The side of the hot air outlet 2 facing the opening 11 has a hot air outlet 21, and the other side of the hot air outlet 2 is connected to a hot air supply pipe 22; the distance between the plane where the hot air outlets 21 of the multiple hot air outlets 2 are located and the plane where the opening 11 is located is not equal.

[0056] The drive mechanism 3 is mounted on the outer casing 1, and the power output end of the drive mechanism 3 is connected to the side of the multiple hot air outlets 2 away from their hot air outlets 21. The drive mechanism 3 can simultaneously drive the multiple hot air outlets 2 to perform reciprocating linear motion in the sliding channel 13.

[0057] To further optimize the above technical solution, the drive mechanism 3 is a crank-connecting rod structure 32 with a motor 31 as the driving force.

[0058] See appendix Figure 2 and attached Figure 3 Each sliding channel 13 is provided with a crank-connecting rod structure 32, and the power of multiple crank-connecting rod structures 32 is connected in series. Each crank-connecting rod structure 32 includes a cam 1 321, a cam 2 322 and a crank 323. The support shafts 324 of the cam 1 321 and the cam 2 322 are rotatably connected to the two side walls of the sliding channel 13 respectively. One end of the crank 323 is hinged to the hot air outlet body 2, and the other end of the crank 323 is rotatably connected between the cam 1 321 and the cam 2 322 through a pin.

[0059] To further optimize the above technical solution, the motor 31 is fixed on the inner wall of the outer casing 1, and the power output shaft of the motor 31 extends out of the outer casing 1, with a drive pulley 33 fixed at its end; the support shaft 324 of one end of the multiple series-connected crankshaft structures 32 extends out of the outer casing 1, with a driven pulley 34 fixed at its end, and a transmission belt 35 is sleeved between the drive pulley 33 and the driven pulley 34.

[0060] To further optimize the above technical solution, the crank 323 on each hot air outlet 2 is connected to the middle of its top surface, and each hot air outlet 2 is connected to two hot air supply pipes 22, which are symmetrically arranged on both sides of the crank 323.

[0061] To further optimize the above technical solution, a main interface 14 is installed on the side wall of the outer casing 1 away from the opening 11, and the main interface 14 is connected to multiple hot air supply pipes 22.

[0062] To further optimize the above technical solution, a pressure sensor is installed inside the hot air outlet body 2.

[0063] To further optimize the above technical solution, the distance between the plane where the hot air outlet 21 of the multiple hot air outlet bodies 2 is located and the plane where the opening 11 is located increases or decreases sequentially.

[0064] In this embodiment, in order to meet the requirements of strength and smoothness of movement, the hot air outlet 2 is set to 4.

[0065] Example 2:

[0066] See appendix Figure 4 This invention discloses a transforming impact hot air penetration paper machine, comprising:

[0067] Paper conveying unit 4 is used to convey the paper tape 6 that needs to be dried. The conveying surface of the paper conveying unit 4 is provided with a changing impact hot air flow module of embodiment 1. The hot air outlets 21 of multiple hot air outlets 2 are directed toward the paper tape 6 that needs to be dried during the conveying process.

[0068] Moisture collection unit 5 is located on the side of the paper conveying unit 4 facing away from the hot air outlet 2. Moisture collection unit 5 is used to collect the moisture separated during the drying process of the paper tape 6.

[0069] In this embodiment, one of the transforming impact hot air flow modules of Embodiment 1 is provided above the paper conveying section 4.

[0070] In this embodiment, the paper conveying section 4 is a straight conveyor belt structure with a hollow mesh belt. Both the paper conveying section 4 and the water collection section 5 are conventional structures and are not the focus of this application, so they will not be described in detail here.

[0071] In this embodiment, the intensity of the hot air impact is changed by controlling the drive mechanism 3 to switch the movement speed of the hot air outlet 2.

[0072] Example 3:

[0073] See appendix Figure 5 This embodiment is a further improvement on embodiment 2. A traditional hot air shroud 8 is set on the front and rear sides of the changing impact hot air flow module. By matching different positions with the traditional hot air penetration structure, the performance of hot air impact can be changed.

[0074] Example 4:

[0075] This embodiment adopts a drum drying structure design, as shown in the figure. The changing impact hot air flow module of embodiment 1 is arranged. Similarly, the movement speed of the hot air outlet 2 can be switched by controlling the drive mechanism 3 to realize the change of the intensity of the hot air impact.

[0076] In this embodiment, the two alternating impact hot air flow modules have different control speeds, which can be controlled to be faster at the beginning and slower at the end.

[0077] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0078] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transforming impact hot airflow module, characterized in that, include: The outer shell (1) has an opening (11) on one side, and the inner wall of the outer shell (1) is divided into a plurality of sliding channels (13) by a partition (12), and the plurality of sliding channels (13) correspond to the opening (11); Hot air outlet (2), the number of hot air outlets (2) is the same as the number of sliding channels (13), and multiple hot air outlets (2) are slidably disposed in the sliding channels (13). Each hot air outlet (2) has a hot air outlet (21) on the side facing the opening (11), and a hot air supply pipe (22) is connected to the other side of the hot air outlet (2). The distance between the plane where the hot air outlet (21) of the multiple hot air outlets (2) is located and the plane where the opening (11) is located is not equal. The drive mechanism (3) is mounted on the outer shell (1), and the power output end of the drive mechanism (3) is connected to the side of the multiple hot air outlets (2) away from their hot air outlets (21). The drive mechanism (3) can simultaneously drive the multiple hot air outlets (2) to make reciprocating linear motion in the sliding channel (13).

2. The transforming impact hot airflow module according to claim 1, characterized in that, The drive mechanism (3) is a crank-connecting rod structure (32) with a motor (31) as the driving force.

3. The transforming impact hot airflow module according to claim 2, characterized in that, Each of the sliding channels (13) is provided with a crank-connecting rod structure (32), and the power of multiple crank-connecting rod structures (32) is connected in series. Each crank-connecting rod structure (32) includes a cam one (321), a cam two (322), and a crank (323). The support shafts (324) of the cam one (321) and the cam two (322) are rotatably connected to the two side walls of the sliding channel (13), and one end of the crank (323) is hinged to the hot air outlet (2). The other end of the crank (323) is rotatably connected between the cam one (321) and the cam two (322) through a pin.

4. A transforming impact hot airflow module according to claim 3, characterized in that, The motor (31) is fixed on the inner wall of the outer casing (1), and the power output shaft of the motor (31) passes through the outer casing (1), and the end is fixed with a drive pulley (33); the support shaft (324) of one end of the multiple series-connected crank-connecting rod structures (32) passes through the outer casing (1), and the end is fixed with a driven pulley (34); a transmission belt (35) is sleeved between the drive pulley (33) and the driven pulley (34).

5. A transforming impact hot airflow module according to claim 3, characterized in that, The crank (323) on each of the hot air outlets (2) is connected to the middle of its top surface. Each of the hot air outlets (2) is connected to two hot air supply pipes (22), which are symmetrically arranged on both sides of the crank (323).

6. A transforming impact hot airflow module according to claim 1, characterized in that, A main interface (14) is installed on the side wall of the outer casing (1) away from the opening (11), and the main interface (14) is connected to multiple hot air supply pipes (22).

7. A transforming impact hot airflow module according to claim 1, characterized in that, A pressure sensor is installed inside the hot air outlet (2).

8. A transforming impingement hot airflow module according to claim 1, characterized in that, The distance between the plane where the hot air outlet (21) of the plurality of hot air outlets (2) is located and the plane where the opening (11) is located increases or decreases sequentially.

9. A transforming impact hot air permeation paper machine, characterized in that, include: Paper conveying unit (4), the paper conveying unit (4) is used to convey paper tape (6) that needs to be dried, the conveying surface of the paper conveying unit (4) is provided with a changing impact hot air flow module according to any one of claims 1-8, and the hot air outlets (21) of the plurality of hot air outlets (2) are directed toward the paper tape (6) that needs to be dried during the conveying process. Moisture collection unit (5) is located on the side of the paper conveying unit (4) facing away from the hot air outlet (2). The moisture collection unit (5) is used to collect the moisture separated during the drying process of the paper tape (6).

10. A method for alternating impact hot air penetration, characterized in that, The alternating impact hot air penetration paper machine according to claim 9 specifically includes: By controlling the drive mechanism (3) to switch the movement speed of the hot air outlet (2), the intensity of the hot air impact can be changed; By setting different numbers of the hot air outlets (2), or by matching different positions with the traditional hot air penetration structure, the performance of hot air impact can be changed.

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