A fiber mixing and uniform distribution device

Abstract

The present invention claims protection for a fiber mixing and uniform distribution device, which includes a main channel, a secondary channel, a speed reduction plate, and a controller; a fiber inlet for introducing fibers is formed at the upper end of the main channel, and a main discharge port is formed at the lower end; one end of the secondary channel is formed with a feed port for introducing granular materials, and the other end is formed with a secondary discharge port and is connected to the main channel for introducing granular materials into the main channel; the width of the main channel below the secondary discharge port is greater than the width of the main channel above the secondary discharge port; the speed reduction plate is used to increase the opening size of the main discharge port; the controller controls the rotation of the speed reduction plate. The main channel is provided with a variable diameter to induce air flow pressure increase and generate disturbance, thereby intensifying the random dispersion effect of the fibers, so that the granular materials can randomly and uniformly impact and entrain the fibers in the main channel. After the mixed materials reach the flared area formed by the speed reduction plate, the entrained fibers and granular materials are separated, and finally, uniformly distributed loose fibers and uniformly distributed granular materials are formed.

Description

Technical Field

[0001] The present invention relates to the technical field of non-woven fabrics, and more specifically, to a fiber mixing and uniform distribution device. Background Art

[0002] Common diaper cores and some non-woven wipes in life are made by mixing short fibers (including wood pulp fibers, bamboo fibers, chemical fibers, etc.) with water-absorbent resin particles. The existing devices for producing such products have problems such as low output and poor mixing performance (mainly manifested in fiber agglomeration and uneven particle distribution). Therefore, how to make the fibers and granular materials mix more evenly is exactly the technical problem to be solved in this application. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a fiber mixing and uniform distribution device, which makes the mixed materials mix more evenly through the disturbance generated by air flow expansion and compression and the structure of the trumpet-shaped ejection port.

[0004] The present invention provides a fiber mixing and uniform distribution device, and the technical solution is as follows:

[0005] A fiber mixing and uniform distribution device includes a main channel, a sub-channel, a speed reduction plate and a controller;

[0006] The upper end of the main channel is formed with a fiber inlet for introducing fibers, and the lower end is formed with a main discharge port;

[0007] One end of the sub-channel is formed with a feed port for introducing granular materials, and the other end is formed with a sub-discharge port and is connected to the main channel for introducing granular materials into the main channel;

[0008] The width of the main channel below the sub-discharge port is greater than the width of the main channel above the sub-discharge port;

[0009] There are two speed reduction plates, which are respectively rotatably connected to both sides of the main discharge port for increasing the opening size of the main discharge port;

[0010] The controller is connected to the speed reduction plates for controlling the rotation of the two speed reduction plates, thereby changing the opening size between the two speed reduction plates.

[0011] In summary, the above technical solution has the following beneficial effects: The fiber inlet of the main channel of this application is used to connect the outlet of a short fiber generating device (such as a bale opener, crusher, etc.), and the feed inlet of the secondary channel is used to connect the outlet of a weighing type feeding device. The mass of the fiber is less than that of the granular material. After the fiber and the granular material are mixed in the main channel, they are jointly discharged from the main discharge port. The main channel is set with a variable diameter to induce the air flow to expand and generate disturbance, thereby intensifying the random dispersion effect of the fiber, enabling the granular material to randomly and evenly impact and entrap the fiber in the main channel. After the mixed material reaches the flared area formed by the deceleration plate, the deceleration plate increases the size of the main discharge port. According to Bernoulli's equation, the air flow decelerates, and the light fiber immediately follows the deceleration. However, the denser granular material has a slower speed reduction due to inertia than the air flow and the fiber, thus separating the entrapped fiber and granular material, and finally forming uniformly distributed loose fibers and uniformly distributed granular material in the flared area formed by the deceleration plate. Thus, the problems of fiber agglomeration and uneven granular material that often occur in the industry are overall avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the main channel of a fiber mixing and uniform distribution device;

[0013] Figure 2 It is a schematic diagram of the controller of a fiber mixing and uniform distribution device;

[0014] Figure 3 It is a schematic diagram of the deceleration plate of a fiber mixing and uniform distribution device;

[0015] Figure 4 It is a schematic diagram of the ventilation holes of a fiber mixing and uniform distribution device.

[0016] Reference numerals: 10, main channel; 11, fiber inlet; 12, main discharge port; 20, secondary channel; 21, feed inlet; 22, secondary discharge port; 30, deceleration plate; 31, protrusion; 32, ventilation hole; 33, sliding rod; 34, fixed edge; 35, sealing disc; 36, sealing ring; 37, sliding piece; 40, controller; 50, air flow channel; 51, air inlet; 52, air outlet; 60, base; 61, cross bar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] Such as Figure 1 and Figure 2As shown in the figure, a fiber mixing and uniform distribution device includes a main channel 10, a secondary channel 20, a speed reduction plate 30, and a controller 40. At the upper end of the main channel 10, a fiber inlet 11 for introducing fibers is formed, and at the lower end, a main discharge port 12 is formed. At one end of the secondary channel 20, a feed inlet 21 for introducing granular materials is formed, and at the other end, a secondary discharge port 22 is formed and connected to the main channel 10 for introducing granular materials into the main channel 10. The width of the main channel 10 below the secondary discharge port 22 is greater than the width of the main channel 10 above the secondary discharge port 22. There are two speed reduction plates 30, which are respectively rotatably connected to both sides of the main discharge port 12 for increasing the opening size of the main discharge port 12. The controller 40 is connected to the speed reduction plates 30 for controlling the rotation of the two speed reduction plates 30, thereby changing the opening size between the two speed reduction plates 30. In this application, the fiber inlet 11 of the main channel 10 is used to connect to the outlet of a short fiber generating device (such as a carding machine, crusher, etc.), and the feed inlet 21 of the secondary channel 20 is used to connect to the discharge port of a weighing type feeding device. The mass of the fiber is less than the mass of the granular material. After the fiber and the granular material are mixed in the main channel 10, they are jointly discharged from the main discharge port 12. By setting the variable diameter of the main channel 10, the induced air flow is diffused and pressurized to generate disturbance, thereby intensifying the random dispersion effect of the fiber, so that the granular material can randomly and evenly impact and entrain the fiber in the main channel 10. After the mixed material reaches the flared area formed by the speed reduction plates 30, the speed reduction plates 30 increase the size of the main discharge port 12. According to Bernoulli's equation, the air flow speed decreases, and the light fiber immediately follows the speed reduction. However, the denser granular material decreases in speed more slowly than the air flow and the fiber due to inertia, thereby separating the entrained fiber and granular material. Finally, a uniformly distributed loose fiber and a uniformly distributed granular material are formed in the flared area formed by the speed reduction plates 30. Thus, the problems of fiber agglomeration and uneven granular materials that often occur in the industry are avoided as a whole.

[0019] Figure 1 is the cross-section of the device, Figure 1 The horizontal direction is defined as the width direction in the figure, Figure 2 and the horizontal direction is the length direction in the figure.

[0020] It further includes an air flow channel 50. The air flow channel 50 forms an acute angle with one side direction at the upper end of the main channel 10. At one end of the air flow channel 50, an air inlet 51 for entering air flow is formed, and at the other end, an air outlet 52 is formed and connected to the main channel 10 for introducing air flow into the main channel 10. The air outlet 52 is located above the secondary discharge port 22. The air flow channel 50 serves as a process cold air channel. The air inlet 51 is used to be connected in series with a fan and an air conditioner evaporator. The acute angle formed by the process air flow and the vertical channel generates negative pressure at the fiber inlet 11, inducing the light fiber at the fiber inlet 11 to move rapidly downward, so that the disturbance generated by the fiber and the granular material in the large-diameter area below the main channel 10 is greater, and the pressure reduction is more obvious when entering the area of the speed reduction plates 30, making the fiber and the granular material more evenly distributed.

[0021] The air flow channel 50 forms a thirty-degree angle with one side of the upper end of the main channel 10. Specifically, the air flow channel 50 includes a first access section and a first connection section that are connected to each other. The air inlet 51 is located on one side of the first access section away from the first connection section. The first access section is arranged horizontally, so as to facilitate the connection of the series fan and the air conditioner evaporator. The air outlet 52 is located on one side of the first connection section away from the first access section. The first connection section forms a thirty-degree angle with one side of the upper end of the main channel 10, and is used to guide the air flow to enter the main channel 10 obliquely downward.

[0022] The secondary channel 20 forms an acute angle with one side of the upper end of the main channel 10.

[0023] Preferably, the secondary channel 20 forms a thirty-degree angle with one side of the upper end of the main channel 10. Specifically, the secondary channel 20 includes a second access section and a second connection end. The feed inlet 21 is located on one side of the second access section away from the second connection section. The second access section is arranged horizontally, so as to facilitate the connection of the staple fiber generating device. The secondary discharge outlet 22 is located on one side of the second connection section away from the second access section. The second connection section forms an acute angle with one side of the upper end of the main channel 10, and the acute angle range is 10 - 45°, and the optimal is 30°.

[0024] The width of the main channel 10 below the secondary discharge outlet 22 is less than twice the width of the main channel 10 above the secondary discharge outlet 22. The width of the main channel 10 above the secondary discharge outlet 22 is a, and the width of the main channel 10 below the secondary discharge outlet 22 is b. The width b satisfies 2a ≥ b ≥ a. If the width of the main channel 10 below the secondary discharge outlet 22 is too large or too small, it will affect the mixing. Therefore, the optimal is b = 1.5a. The distance between the secondary discharge outlet 22 and the air outlet 52 is greater than or equal to three times the width of the main channel 10 above the secondary discharge outlet 22, that is, the distance between the secondary discharge outlet 22 and the air outlet 52 is c, and it satisfies c ≥ 3a. Such a setting can allow the fiber to have enough time and distance to be accelerated to the same speed as the wind speed between the secondary discharge outlet 22 and the air outlet 52. The larger the width above the secondary discharge outlet 22, the more the feed, and the corresponding distance between the secondary discharge outlet 22 and the air outlet 52 should also be larger.

[0025] The main channel 10 can be disconnected between the secondary discharge outlet 22 and the air outlet 52, and also between the secondary discharge outlet 22 and the connection of the speed reduction plate 30, and is fixedly connected by a flange. Disconnecting the main channel 10 can turn it into two three-way components, thus facilitating processing and assembly.

[0026] It further includes a base 60. The bases 60 are distributed on both sides of the speed reduction plate 30 and are connected to the main channel 10 for supporting the main channel 10. The lower end of the base 60 is used to be fixed on the web forming machine. The space between the bases 60 is used for the speed reduction plate 30 to rotate, and the base 60 is also used to block both sides of the speed reduction plate 30.

[0027] The base 60 is provided with a cross bar 61 outside the speed reduction plate 30. The controller 40 is a telescopic member. One end of the telescopic member is rotatably arranged on the cross bar 61, and the other end is movably connected to the speed reduction plate 30. The main channel 10, the secondary channel 20, and the air flow channel 50 all extend along the length direction to form a narrow channel. The speed reduction plate 30 is correspondingly arranged along the extending direction of the main discharge port 12. A number of telescopic rods are respectively connected to the outside of the two speed reduction plates 30. One end of the telescopic member is rotatably arranged on the cross bar 61 and will not move. The telescopic member and the speed reduction plate 30 are connected by two rings, so as to facilitate movement. The telescopic member can control the opening and closing degree of the speed reduction plate 30 by telescoping. The telescopic member is a component such as an electromagnet or an electric pull rod. The controller 40 can also adopt other control methods, such as a motor cooperating with a cam to realize the opening and closing of the speed reduction plate 30. The side where the two speed reduction plates face each other is the inner side, and the side where they face away from each other is the outer side.

[0028] The included angle between one speed reduction plate 30 and the vertical direction ranges from ten degrees to thirty degrees. There are two ways to use the speed reduction plate 30. One is a fixed included angle, and the other is a variable included angle. A fixed included angle means that the controller 40 controls the speed reduction plate 30 to maintain a certain angle and remain unchanged, so as to achieve a stable splitting effect. The controller 40 can also control the speed reduction plate 30 to repeatedly perform the opening and closing action within a specified angle range. In this way, when the angle of the speed reduction plate 30 becomes larger, it can better disperse and split the mixed materials, achieving a more uniform mixing effect.

[0029] The flow velocity of the air flow in the air flow channel 50 is v, the height of the speed reduction plate 30 is l, and the controller 40 controls the speed reduction plate 30 to complete one opening and closing within the included angle range within the time t. The time t satisfies the following relational expression;

[0030]

[0031] Wherein, a is the width of the main channel 10 above the secondary discharge port 22, b is the width of the main channel 10 below the secondary discharge port 22, α is the included angle between the speed reduction plate 30 and the vertical direction and is selected as 30°, and l is the height of the speed reduction plate 30.

[0032] The speed of the air flow channel 50 acting on the fibers is greater than their own falling speed. Therefore, the speed of the fibers driven by the air flow is not greater than the air flow speed. After the air flow enters the area below the secondary feed port 21 of the main channel 10, because the width of the main channel 10 becomes larger, the speed of the air flow is , where a is the width of the main channel 10 above the secondary discharge port 22, b is the width of the main channel 10 below the secondary discharge port 22, and the mixing speed of the fibers and the granular materials is not greater than , and the height of the speed reduction plate 30 in the vertical direction is , where l is the height of the speed reduction plate 30, and α is the angle between the speed reduction plate 30 and the vertical direction. To calculate the shortest time, the angle alpha is selected as 30°. The fastest time t for the air flow to pass through the area of the speed reduction plate 30 without changing its speed is , because the opening between the speed reduction plates 30 becomes larger. Therefore, the time for the air flow or the mixed material to pass through between the speed reduction plates 30 is less than time t. Therefore, if the speed reduction plate 30 completes one opening and closing within time t, all the mixed materials passing through the area of the speed reduction plate 30 can be broken up and split, so as to achieve the effect of making the mixed materials more evenly mixed.

[0033] Such as Figure 3 and Figure 4 As shown, a number of protrusions 31 are provided on the opposite side surfaces of the two speed reduction plates 30. When the air flow carrying fibers and granular materials flows out from the main discharge port 12 of the main channel 10 and passes through the area between the speed reduction plates 30, due to the viscous effect of the air flow, an attached wall flow will be formed on the near wall surface of the speed reduction plate 30. This attached wall flow will develop and strengthen, and it is very easy to randomly generate a peeling effect during the downward movement along the wall surface of the speed reduction plate 30, generating random turbulent flows, thus affecting the uniformity of the product below. In order to eliminate the influence of the attached wall flow, a number of arc-shaped protrusions 31 are provided on the speed reduction plate 30, and they can also be provided only in the upper half. Through the interference effect of the protrusions 31 on the attached wall flow, the attached wall flow is disturbed and destroyed at the initial development stage, peeled off in advance, and the generation of greater disturbances after its development and strengthening is avoided, thus ensuring the uniformity of the final product. The protrusions 31 can be of any shape, preferably semi-circular arc-shaped protrusions 31. The protrusions 31 are arranged in an array in the horizontal direction and in a staggered array in the vertical direction, so that the three closest non-linear protrusions 31 are arranged in an equilateral triangle. The semi-circular diameter of the protrusions 31 is 5 mm, the height of the protrusions 31 is 1 - 2 mm, and the relationship between the center distance e of the protrusions 31 in the horizontal direction and the bottom circle diameter d of the convex surface is 2d ≤ e ≤ 3d.

[0034] A number of ventilation holes 32 are provided at the upper end of the speed reduction plate 30. After the mixed material formed by fibers and granular materials is ejected from the main discharge port 12, in order to quickly reduce the pressure in the area of the speed reduction plate 30, ventilation holes 32 are provided at the upper end of the pressure reduction plate. In this way, the outside air can enter the area between the pressure reduction plates from the ventilation holes 32, so as to achieve a better pressure reduction effect, and thus make the mixed material more evenly dispersed.

[0035] A sliding rod 33 extending axially is arranged in the ventilation hole 32. A fixing edge 34 extends from the inner end of the sliding rod 33 towards the inner wall of the ventilation hole 32. A circular sealing disc 35 is arranged at the outer end of the sliding rod 33. An annular sealing ring 36 is arranged at the outer end of the ventilation hole 32, such that the diameter of the outer end of the ventilation hole 32 is smaller than that of the inner end. A sliding piece 37 is sleeved on the sliding rod 33. The sliding piece 37 is concentric and is used to slide along the sliding rod 33. The diameter of the central circular hole of the sliding piece 37 is smaller than the diameter of the sealing disc 35. The diameter of the outer ring of the sliding piece 37 is larger than the inner hole diameter of the sealing ring 36 and smaller than the diameter of the ventilation hole 32. When the sliding piece 37 moves to the inner end of the sliding rod 33, the ventilation hole 32 can pass air flow. When the sliding piece 37 moves to the outer end of the sliding rod 33, the ventilation hole 32 is blocked by the sliding piece 37. Due to the arrangement of the sealing disc 35 and the sealing ring 36, concentric holes are formed outside the ventilation hole 32 and can be completely covered by the sliding piece 37. When the speed reducer plate adopts a fixed angle, the sliding piece 37 is always at the inner side of the sliding rod 33 due to air pressure, and the ventilation hole 32 is always in an open state without change. When the speed reducer plate adopts a variable angle mode, during the process of the speed reducer plate opening outwards, the external air flow will enter the area between the pressure reducing plates through the ventilation hole 32. At this time, the sliding piece 37 is blown by the air flow to the inner end of the sliding rod 33, and the ventilation hole 32 is in an open state. During the process of the speed reducer plate closing inwards, the sliding piece 37 will slide to the outer end of the sliding rod 33 due to inertia. At this time, the ventilation hole 32 is in a closed state, thus preventing the mixed material from going out through the ventilation hole 32.

[0036] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A fiber mixing and uniform distribution device, characterized in that It includes a main channel (10), a secondary channel (20), a speed reduction plate (30) and a controller (40); At the upper end of the main channel (10), a fiber inlet (11) for introducing fibers is formed, and at the lower end, a main discharge port (12) is formed; One end of the secondary channel (20) is formed with a feed port (21) for introducing granular material, and the other end is formed with a secondary discharge port (22) and is connected to the main channel (10) for introducing granular material into the main channel (10); The width of the main channel (10) below the secondary discharge port (22) is greater than the width of the main channel (10) above the secondary discharge port (22); There are two speed reduction plates (30), which are respectively rotatably connected to both sides of the main discharge port (12) for increasing the opening size of the main discharge port (12); The controller (40) is connected to the speed reduction plates (30) for controlling the rotation of the two speed reduction plates (30) to change the opening size between the two speed reduction plates (30); A plurality of ventilation holes (32) are formed at the upper end of the speed reduction plate (30); A sliding rod (33) extending along the axial direction is arranged in the ventilation hole (32). At the inner end of the sliding rod (33) towards the inner wall of the ventilation hole (32), a fixing edge (34) extends, and at the outer end of the sliding rod (33), a circular sealing disc (35) is arranged; At the outer end of the ventilation hole (32), an annular sealing ring (36) is arranged, such that the diameter of the outer end of the ventilation hole (32) is smaller than that of the inner end; A sliding piece (37) is sleeved on the sliding rod (33). The sliding piece (37) is concentric and is used to slide along the sliding rod (33). The diameter of the central circular hole of the sliding piece (37) is smaller than the diameter of the sealing disc (35), and the diameter of the outer ring of the sliding piece (37) is larger than the inner diameter of the sealing ring (36) and smaller than the diameter of the ventilation hole (32); When the sliding piece (37) moves to the inner end of the sliding rod (33), the ventilation hole (32) can pass air flow. When the sliding piece (37) moves to the outer end of the sliding rod (33), the ventilation hole (32) is blocked by the sliding piece (37); It further includes an air flow channel (50). One end of the air flow channel (50) is formed with an air inlet (51) for entering air flow, and the other end is formed with an air outlet (52) and is connected to the main channel (10) for introducing air flow into the main channel (10). The flow rate of the air flow in the air flow channel (50) is v, the height of the speed reduction plate (30) is l, and the controller (40) controls the speed reduction plate (30) to complete one opening and closing within an angular range in time t, and the time t satisfies the following relationship; Wherein, a is the width of the main channel (10) above the secondary discharge port (22), b is the width of the main channel (10) below the secondary discharge port (22), α is the angle between the speed reduction plate (30) and the vertical direction and is selected as 30°, and l is the height of the speed reduction plate (30).

2. The fiber mixing and uniform distribution device according to claim 1, characterized in that, The air flow channel (50) forms an acute angle with one side direction at the upper end of the main channel (10), and the air outlet (52) is located above the secondary discharge port (22).

3. A fiber mixing and uniform distribution device according to claim 1, characterized in that, The secondary channel (20) forms an acute angle with one side direction at the upper end of the main channel (10).

4. A fiber mixing and uniform distribution device according to claim 1, characterized in that The distance between the secondary discharge port (22) and the air outlet (52) is greater than or equal to three times the width of the main channel (10) above the secondary discharge port (22).

5. A fiber mixing and uniform distribution device according to claim 1, characterized in that, The width of the main channel (10) below the secondary discharge port (22) is less than twice the width of the main channel (10) above the secondary discharge port (22).

6. A fiber mixing and uniform distribution device according to any one of claims 1-5, characterized in that, It further includes a base (60), and the bases (60) are distributed on both sides of the speed reduction plate (30) and are connected to the main channel (10) for supporting the main channel (10). The base (60) is provided with a cross bar (61) on the outer side of the speed reduction plate (30), the controller (40) is a telescopic member, one end of the telescopic member is rotatably arranged on the cross bar (61), and the other end is movably connected to the speed reduction plate (30).

7. A fiber mixing and uniform distribution device according to any one of claims 1-5, characterized in that, A plurality of protrusions (31) are provided on the opposite side surfaces of the two speed reduction plates (30).

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