A wood pulp fiber conveying and dispensing apparatus

Abstract

The utility model discloses a wood pulp fiber conveying distribution device, including at least one's first rubbing crusher or second rubbing crusher, wherein, first rubbing crusher or second rubbing crusher is connected with first channel or second channel respectively, first channel or second channel is connected to extension channel through connecting channel, wherein, extension channel is connected to air supplement channel. The utility model is directly sent to the web former of wood pulp all to the net belt, and unlike the wood pulp forming device of filter screen structure of previous adoption has the non - constant wood pulp return process, thereby greatly reduced the fluctuation of wood pulp amount with time of sending out, can effectively adjust the distribution state of wood pulp in the export width direction before wood pulp reaches wood pulp channel export, even if wood pulp channel export is rubbing crusher export width ratio reaches 1:3 still can obtain the wood pulp flow that is evenly distributed and continuously stably sent along the width direction in the export, effectively solved the width requirement of non - woven fabric, avoided the distribution difference problem when the width of multiple rubbing crusher is parallel.

Description

Technical Field

[0001] This utility model relates to a wood pulp fiber conveying device, and more particularly to a wood pulp fiber conveying and distributing device. Background Technology

[0002] Dry papermaking and nonwoven products containing wood pulp fibers have a huge market, covering multiple fields such as daily life, hygiene and cleaning, medical and health care, and industry.

[0003] Recently, in order to reduce the manufacturing costs of the aforementioned products and decrease water consumption during the manufacturing process, a new nonwoven fabric called "he-spun" has emerged, which blends microfiber with wood pulp in a monofiber state. The wood pulp / fiber blended multilayer nonwoven fabric produced by this new process has changed the problems of the original "double spinning" process, which involved complex production processes and equipment and long workflows.

[0004] However, two major problems severely impact product quality and hinder further improvements in production efficiency. First, the significant inertia of wood pulp shredders makes it impossible to use shredders with large widths in production. Generally, a suitable shredder width is only 500–800 mm, which is clearly insufficient for the 1600–3200 mm width of nonwoven fabrics. Second, when using a single shredder for width expansion or multiple shredders for width expansion, the distribution of wood pulp fibers along the width direction varies greatly, resulting in stripes of varying widths and thicknesses on the wood pulp mesh, which cannot meet the requirements for post-processing and use of the product. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a wood pulp fiber conveying and distribution device, which solves the problem of uniformly distributing wood pulp fibers in the required width direction and stably and continuously delivering them to a specific part.

[0006] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0007] This utility model provides a wood pulp fiber conveying and distributing device, comprising at least one first pulverizer or a second pulverizer, wherein...

[0008] The first pulverizer or the second pulverizer is each connected to a first channel or a second channel;

[0009] The first channel or the second channel is connected to the expansion channel via a connection channel, wherein,

[0010] The extended channel is connected to the make-up air channel;

[0011] The extended channel is connected to a make-up air mechanism.

[0012] As a preferred embodiment of this utility model, the air supply mechanism has a plurality of air supply ports, wherein...

[0013] Each of the aforementioned air inlets is connected to an air source mechanism.

[0014] As a preferred embodiment of the present invention, the first channel has a first inlet for connecting to the first crusher; the second channel has a second inlet for connecting to the second crusher.

[0015] As a preferred embodiment of this utility model, the end of the air supply channel is a wood pulp outlet.

[0016] As a preferred embodiment of this utility model, the first crusher or the second crusher is used to crush the wood pulp board that has entered its interior.

[0017] As a preferred technical solution of this utility model, the ratio of the inlet width to the outlet width of the first channel or the second channel is greater than or equal to 1:1 and less than or equal to 1:4.

[0018] As a preferred embodiment of this utility model, both the first pulverizer and the second pulverizer are configured as a single unit.

[0019] The beneficial effects of this utility model are as follows: This utility model directly feeds all the wood pulp into the forming belt, unlike the previous wood pulp forming devices with a filter structure that had a non-constant wood pulp return process, thus greatly reducing the fluctuation of the amount of wood pulp delivered over time; it can effectively adjust the distribution of wood pulp in the width direction of the outlet before the wood pulp reaches the outlet of the wood pulp channel, so that even if the width ratio of the wood pulp channel outlet to the pulverizer outlet reaches 1:3, a uniformly distributed and continuously stable flow of wood pulp can still be obtained at the outlet; it effectively solves the problem of dealing with the width requirements of nonwoven fabrics and avoids the problem of distribution differences when multiple pulverizers are connected in parallel. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] In the diagram: 000, wood pulp board; 100, first crusher; 200, second crusher; 300, first channel; 301, first inlet; 400, second channel; 401, second inlet; 500, connecting channel; 600, expansion channel; 700, make-up air channel; 701, wood pulp outlet; 800, make-up air mechanism; 801, make-up air inlet. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] Example

[0024] like Figure 1 As shown, this embodiment provides a wood pulp fiber conveying and distributing device, including at least one first crusher 100 or a second crusher 200, wherein the first crusher 100 or the second crusher 200 is respectively connected to a first channel 300 or a second channel 400.

[0025] The first channel 300 or the second channel 400 is connected to the expansion channel 600 via the connecting channel 500. The expansion channel 600 is connected to the make-up air channel 700, and the end of the make-up air channel 700 is the wood pulp outlet 701, which facilitates material discharge.

[0026] An expansion channel 600 is connected to a make-up air mechanism 800. Specifically, the make-up air mechanism 800 has several make-up air inlets 801, each of which is connected to an air source mechanism. For example, the make-up air inlets 801 are arranged in an array with equal spacing of 160mm in the width direction of the expansion channel 600. Each make-up air inlet 801 is connected to an independently adjustable air source mechanism via a flexible hose. The air source mechanism delivers clean air to the corresponding make-up air inlet 801 according to a set air pressure, thereby forming a locally adjustable airflow compensation zone inside the expansion channel 600. The airflow in this compensation zone is fully mixed with the main airflow carrying the wood pulp fibers in the mixing zone of the expansion channel 600, allowing the wood pulp fibers to achieve real-time correction of weight deviation along the width direction before reaching the wood pulp outlet 701, ensuring that the wood pulp web finally falling onto the forming screen is of uniform thickness and without stripes.

[0027] The first channel 300 has a first inlet 301 to connect to the first crusher 100; the second channel 400 has a second inlet 401 to connect to the second crusher 200. Specifically, the first channel 300 has a first inlet 301 to connect to the first crusher 100, and the cross-sectional shape of the first inlet 301 is completely matched with the outlet end face of the first crusher 100 and sealed with a flange to ensure that the crushed wood pulp fibers enter the first channel 300 directly without leakage after leaving the first crusher 100; the second channel 400 has a second inlet 401 to connect to the second crusher 200, and the second inlet 401 is also sealed with the outlet end face of the second crusher 200 in the same way, so that the single-fiber wood pulp fibers crushed by the second crusher 200 can smoothly and continuously transition into the second channel 400. The widths of the first inlet 301 and the second inlet 401 are consistent with the outlet widths of their respective crushers, ensuring that there is no abrupt change in the initial flow cross section, reducing airflow and fiber velocity loss, and providing stable and uniform feed conditions for subsequent expansion and distribution.

[0028] The first pulverizer 100 or the second pulverizer 200 is used to pulverize the wood pulp board 000 that enters it. Typically, the wood pulp board 000 is continuously fed in from the feed inlet, and after being sheared, torn and assisted by the high speed of the toothed pulverizing rollers and airflow, it is quickly separated into single fibers and pushed into the first channel 300 or the second channel 400 by the airflow. This pulverizing process is completed instantaneously at a high speed of 4000 to 4500 rpm, which ensures that the wood pulp fibers are fully opened and maintains the integrity of the fiber length. Subsequently, the pulverized wood pulp fibers leave the outlet of the first pulverizer 100 or the second pulverizer 200 at a stable flow rate under the dual action of the centrifugal force of the toothed rollers and the negative pressure induced draft.

[0029] The ratio of the inlet width to the outlet width of the first channel (300) or the second channel (400) is greater than or equal to 1:1 and less than or equal to 1:4.

[0030] In another preferred embodiment of the present invention, the first crusher 100 and the second crusher 200 are both configured as one, which is different from the single crusher (first crusher 100 or second crusher 200) in the previous embodiments.

[0031] Specifically, the following is a typical implementation process: In this embodiment, the first crusher 100 and the second crusher 200 are preferably toothed crushers with an effective width of 500mm, which can crush and separate wood pulp fibers in one step. The crusher speed is 4000-4500rpm, and a wood pulp board 000 with a width of 480mm is used, with a corresponding crushing capacity of 400kg / H. The separated wood pulp reaches the first inlet 301 or the second inlet 401 through the outlet of the first pulverizer 100 or the second pulverizer 200. It undergoes a diffusion in the first channel 300 and the second channel 400, and enters the arc-shaped expansion channel 600 with a width of 1650mm along the inlet channel under the drive of the airflow of the pulverizer. The wood pulp expands once under the drive of the airflow and continues to advance into the mixing zone with the forced air supply channel 700. The wood pulp continues to fall and falls onto the forming curtain of the forming machine through the wood pulp outlet 701 located above the forming port of the forming machine. The forming curtain runs at speeds of 50m / min and 100m / min respectively, continuously delivering sheets of wood pulp screen.

[0032] Preferably, the nominal basis weight of the wood pulp web can be 40 gsm and 80 gsm, depending on the pulping capacity of the pulp pulverizer, the width of the pulp channel outlet, and the speed of the web forming machine. Ten samples are cut at 160 mm intervals, and the basis weight of each sample is calculated. For deviations in nominal basis weight from the sample, the air supply to the corresponding air inlet 801 is adjusted to change the corresponding air pressure, thereby altering the wood pulp content in the airflow and thus changing the basis weight of the wood pulp web at that location. The maximum difference between the forced air inlets is adjusted to 40%, resulting in a smooth, stripe-free wood pulp web. Dividing the wood pulp web into ten equal parts along its width, the CV value of the obtained sample gsm is ≤3.5, significantly better than the uniformity of products from other processes. These results can be consistently achieved over a long period without changing the wood pulp feed rate.

[0033] This invention directly feeds all the wood pulp into the forming belt, unlike previous wood pulp forming devices with a filter structure that had a non-constant wood pulp return process, thus greatly reducing the fluctuation of the output wood pulp volume over time. It can effectively adjust the distribution of wood pulp in the width direction of the outlet before the wood pulp reaches the outlet of the wood pulp channel. Even if the width ratio of the wood pulp channel outlet to the pulverizer outlet is 1:3, a uniform and continuous stable flow of wood pulp can still be obtained at the outlet. It effectively solves the problem of dealing with the width requirements of nonwoven fabrics and avoids the problem of distribution differences when multiple pulverizers are used in parallel.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A wood pulp fiber conveying and distributing device, characterized in that, Includes at least one first pulverizer (100) or a second pulverizer (200), wherein, The first pulverizer (100) or the second pulverizer (200) is each connected to a first channel (300) or a second channel (400); The first channel (300) or the second channel (400) is connected to the extension channel (600) via a connection channel (500), wherein, The extended channel (600) is connected to the make-up air channel (700); The extended channel (600) is connected to an air supply mechanism (800).

2. The wood pulp fiber conveying and distributing device according to claim 1, characterized in that, The air supply mechanism (800) has a plurality of air supply ports (801), wherein, Each of the aforementioned air inlets (801) is connected to an air source mechanism.

3. The wood pulp fiber conveying and distributing device according to claim 1, characterized in that, The first channel (300) has a first inlet (301) for connecting to the first crusher (100); the second channel (400) has a second inlet (401) for connecting to the second crusher (200).

4. The wood pulp fiber conveying and distributing device according to claim 1, characterized in that, The end of the air supply channel (700) is the wood pulp outlet (701).

5. The wood pulp fiber conveying and distributing device according to claim 1, characterized in that, The first pulverizer (100) or the second pulverizer (200) is used to pulverize the wood pulp board (000) that has entered its interior.

6. The wood pulp fiber conveying and distributing device according to claim 1, characterized in that, The ratio of the inlet width to the outlet width of the first channel (300) or the second channel (400) is greater than or equal to 1:1 and less than or equal to 1:

4.

7. A wood pulp fiber conveying and distributing device according to any one of claims 1 to 6, characterized in that, The first pulverizer (100) and the second pulverizer (200) are both configured as one.

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