CN219752832U - Vacuum couch roll and high-low double-vacuum-cavity dehydration system - Google Patents

Abstract

The utility model provides a vacuum couch roll, which comprises a couch roll body, wherein the couch roll body comprises a rolling shell, a vacuum box, a high vacuum system and a low vacuum system, wherein the rolling shell is contacted with a net part, a plurality of dehydration holes are formed in the rolling shell, the vacuum box is arranged in the middle of the rolling shell, and two ends of the vacuum box are rotatably fixed on two opposite inner side walls of the rolling shell through connecting pieces; a partition plate is arranged in the vacuum box, the partition plate divides the vacuum box into a high vacuum cavity and a low vacuum cavity which are not communicated with each other, and the high vacuum cavity and the low vacuum cavity are respectively communicated with the high vacuum system and the low vacuum system through pipelines; the contact area of the high vacuum cavity and the inner side wall of the rolling shell is smaller than that of the low vacuum cavity and the inner side wall of the rolling shell. The utility model ensures the effect of vacuum dehydration and the high vacuum cavity required by dehydration, and effectively saves the power consumption required by generating high vacuum.

Description

Vacuum couch roll and high-low double-vacuum-cavity dehydration system

Technical Field

The utility model relates to the field of papermaking equipment, in particular to a vacuum couch roll and a high-low double-vacuum-cavity dehydration system.

Background

Prior art papers are typically manufactured by paper machines; pulp suitable for paper quality is diluted to a certain concentration by water, is primarily dehydrated in a wire part of a paper machine, is squeezed and dehydrated by a pressing part and is then dried into paper, wherein a vacuum couch roll is arranged between a wire outlet part and a press inlet part, and the vacuum couch roll sucks water away by high vacuum so as to improve the dryness of the paper web at the wire outlet part.

The paper making industry is a large consumer of energy consumption, the power consumption is one of the resource consumption, the resource saving is the requirement of building a resource saving environment-friendly society, how to reduce the waste of the resource is also a test facing the paper making industry, and along with the improvement of people's environmental awareness, the energy saving and emission reduction are also the root of sustainable development of the paper making industry.

The existing vacuum couch roll is generally provided with a vacuum box to manufacture a vacuum cavity in the contact area of the couch roll and a paper web, under the condition that the contact area is a certain area, the higher the vacuum is, the better the pumping effect is, in the prior art, a single high vacuum system is generally adopted to form the high vacuum cavity, in order to ensure the pumping effect, the dewatering time is required to be ensured to be long, the area of the contact area is also large, the power consumption of the vacuum system for pumping is in direct proportion to the contact area of the vacuum cavity and the paper web, the large contact area causes the problem of high power consumption, and the single low vacuum is used, even if the dewatering time is improved, the pumping effect is poor, and the moisture of the paper web is still higher.

There is therefore a need for a vacuum couch roll and dewatering system which consume little power and which ensure the dewatering effect of the web.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the vacuum couch roll, which not only ensures the effect of vacuum dehydration, but also ensures a high vacuum cavity required by dehydration, and effectively saves the power consumption required by high vacuum generation.

The technical scheme of the utility model is realized as follows:

the vacuum couch roll comprises a couch roll body, wherein the couch roll body comprises a rolling shell, a vacuum box, a high vacuum system and a low vacuum system, wherein the rolling shell is contacted with a net part, a plurality of dehydration holes are formed in the rolling shell, the vacuum box is arranged in the middle of the rolling shell, and two ends of the vacuum box are rotatably fixed on two opposite inner side walls of the rolling shell through connecting pieces; a partition plate is arranged in the vacuum box, the partition plate divides the vacuum box into a high vacuum cavity and a low vacuum cavity which are not communicated with each other, and the high vacuum cavity and the low vacuum cavity are respectively communicated with the high vacuum system and the low vacuum system through pipelines; the contact area of the high vacuum cavity and the inner side wall of the rolling shell is smaller than that of the low vacuum cavity and the inner side wall of the rolling shell.

Further, the rolling shell is made of stainless steel.

Further, the low vacuum cavity and the high vacuum cavity are sequentially arranged along the rolling direction of the couch roll body.

Further, the connection is configured as a bearing.

The utility model also provides a high-low double-vacuum-cavity dehydration system, which comprises a net part, a tensioning roller and the vacuum couch roller, wherein the net part is arranged on the vacuum couch roller and the tensioning roller and rolls along with the vacuum couch roller.

Compared with the prior art, the utility model has the following advantages.

According to the utility model, the vacuum box with the high vacuum cavity and the low vacuum cavity is arranged, so that the contact area between the high vacuum cavity and the inner side wall of the rolling shell is smaller than the contact area between the low vacuum cavity and the inner side wall of the rolling shell, and the time of dewatering in the low vacuum is longer than that of dewatering in the high vacuum when the paper web is discharged from the wire outlet part, so that the paper web with water is pumped out through the dewatering holes in the rolling shell when the paper web passes through the low vacuum, preliminary dewatering is realized, then the high vacuum cavity contacts the paper web after preliminary dewatering again on the basis of the low vacuum cavity, the moisture on the paper web is removed again, and the paper web is ensured to have better dryness. According to the utility model, the wet paper web is dehydrated sequentially through the low vacuum cavity and the high vacuum cavity, so that the dehydration time of the high vacuum cavity can be shortened, the corresponding contact area is reduced, and the dehydration effect is ensured while the power consumption of the high vacuum system is effectively reduced.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic diagram of a high-low dual vacuum chamber dehydration system according to the present utility model;

the attached drawings are identified: 1-a rolling housing; 2-a vacuum box; 21-a high vacuum chamber; 22-a low vacuum chamber; 3-high vacuum system; 4-a low vacuum system; 5-mesh part; 6-tensioning rollers; 7-web.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The embodiment of the utility model provides a vacuum couch roll and a high-low double-vacuum-cavity dewatering system, wherein a vacuum box 2 with a high-vacuum cavity 21 and a low-vacuum cavity 22 is arranged to ensure that the contact area between the high-vacuum cavity 21 and the inner side wall of a rolling shell 1 is smaller than the contact area between the low-vacuum cavity 22 and the inner side wall of the rolling shell 1, so that the time for dewatering the paper web 7 in low vacuum is longer than the time for dewatering in high vacuum when a wire outlet part 5 is arranged, and therefore, when the paper web 7 with water passes through the low vacuum, water is pumped out through a dewatering hole in the rolling shell 1 to realize preliminary dewatering, and then the high-vacuum cavity 21 contacts the paper web 7 after preliminary dewatering again on the basis of the low-vacuum cavity 22, so that the water on the paper web 7 is removed again, and the paper web 7 is ensured to have better dryness. According to the utility model, the wet paper web 7 is dehydrated sequentially through the low vacuum cavity 22 and the high vacuum cavity 21, so that the dehydration time of the high vacuum cavity 21 can be shortened, the corresponding contact area is reduced, the power consumption of the high vacuum system 3 is effectively reduced, and the dehydration effect is ensured. The following is a detailed description.

The embodiment of the utility model discloses a vacuum couch roll with reference to fig. 1, which comprises a couch roll body, wherein the couch roll body comprises a rolling shell 1, a vacuum box 2, a high vacuum system 3 and a low vacuum system 4 which are contacted with a wire part 5, and the rolling shell 1 is preferably made of stainless steel, so that the couch roll has the advantages of high strength and difficult rust, and the problem of rust of the vacuum couch roll caused by wet paper web 7 is effectively avoided. The rolling shell 1 is provided with a plurality of dehydration holes, the vacuum box 2 is arranged in the middle of the rolling shell 1, and two ends of the vacuum box are rotatably fixed on two opposite inner side walls of the rolling shell 1 through connecting pieces; the vacuum box 2 is internally provided with a baffle plate, the baffle plate and the vacuum box 2 are integrally formed to ensure that the high vacuum cavity 21 and the low vacuum cavity 22 are not communicated completely, the baffle plate divides the vacuum box 2 into the high vacuum cavity 21 and the low vacuum cavity 22 which are not communicated mutually, and the high vacuum cavity 21 and the low vacuum cavity 22 are respectively communicated with the high vacuum system 3 and the low vacuum system 4 through pipelines; the high and low vacuum system 4 pumps the air in the high and low vacuum cavities 22 to a preset value in a vacuumizing mode, so that a corresponding high vacuum environment and low vacuum environment are formed, and the contact area between the high vacuum cavity 21 and the inner side wall of the rolling shell 1 is smaller than that between the low vacuum cavity 22 and the inner side wall of the rolling shell 1. According to the utility model, by arranging the vacuum box 2 with the high vacuum cavity 21 and the low vacuum cavity 22, the contact area between the high vacuum cavity 21 and the inner side wall of the rolling shell 1 is ensured to be smaller than the contact area between the low vacuum cavity 22 and the inner side wall of the rolling shell 1, so that the time for dewatering in the low vacuum is longer than that in the high vacuum dewatering when the paper web 7 is discharged from the wire outlet part 5, therefore, when the paper web 7 with water passes through the low vacuum, water is pumped out through the dewatering holes in the rolling shell 1, the preliminary dewatering is realized, then the high vacuum cavity 21 contacts the paper web 7 after the preliminary dewatering again on the basis of the low vacuum cavity 22, and the water on the paper web 7 is removed again, so that the paper web 7 has better dryness is ensured. According to the utility model, the wet paper web 7 is dehydrated sequentially through the low vacuum cavity 22 and the high vacuum cavity 21, so that the dehydration time of the high vacuum cavity 21 can be shortened, the corresponding contact area is reduced, the power consumption of the high vacuum system 3 is effectively reduced, and the dehydration effect is ensured.

Further, the low vacuum chamber 22 and the high vacuum chamber 21 are arranged in this order along the rolling direction of the couch roll body. The wet paper web 7 of the wire-out part 5 is ensured to pass through the low vacuum chamber 22 with larger contact area and then the high vacuum chamber 21 when passing through the vacuum couch roll,

further, the connection is configured as a bearing. So that the vacuum box 2 does not rotate with the rotation of the roll housing 1, ensuring that the contact position of the high vacuum chamber 21 and the low vacuum chamber 22 with the wet paper web 7 remains stable.

The utility model can realize the effect of reducing the power consumption of paper making by 20 degrees per ton of paper, so that the paper making industry saves more power after using the paper making industry, and meets the requirements of environmental protection and market better.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (5)

1. The vacuum couch roll comprises a couch roll body, and is characterized in that the couch roll body comprises a rolling shell (1) contacted with a net part (5), a vacuum box (2), a high vacuum system (3) and a low vacuum system (4), wherein a plurality of dehydration holes are arranged on the rolling shell (1), the vacuum box (2) is arranged in the middle of the rolling shell (1), and two ends of the vacuum box are rotatably fixed on two opposite inner side walls of the rolling shell (1) through connecting pieces;

a partition plate is arranged in the vacuum box (2), the partition plate divides the vacuum box (2) into a high vacuum cavity (21) and a low vacuum cavity (22) which are not communicated with each other, and the high vacuum cavity (21) and the low vacuum cavity (22) are respectively communicated with the high vacuum system (3) and the low vacuum system (4) through pipelines;

the contact area of the high vacuum cavity (21) and the inner side wall of the rolling shell (1) is smaller than the contact area of the low vacuum cavity (22) and the inner side wall of the rolling shell (1).

2. Vacuum couch roll according to claim 1, characterized in that the rolling housing (1) is of stainless steel.

3. Vacuum couch roll according to claim 2, characterized in that the low vacuum chamber (22) and the high vacuum chamber (21) are arranged in sequence in the roll direction of the couch roll body.

4. A vacuum couch roll according to claim 3, wherein the connection is configured as a bearing.

5. A high and low double vacuum chamber dewatering system comprising a wire section (5) and a tensioning roll (6), characterized in that it further comprises a vacuum couch roll according to any of claims 1-4, said wire section (5) being arranged on and rolling with said vacuum couch roll and said tensioning roll (6).