CN202809375U

CN202809375U - Papermaking vacuum press roll

Info

Publication number: CN202809375U
Application number: CN 201220517199
Authority: CN
Inventors: 甘木林
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-10-10
Filing date: 2012-10-10
Publication date: 2013-03-20
Anticipated expiration: 2022-10-10

Abstract

The utility model relates to papermaking press part equipment and provides a papermaking vacuum press roll which is reasonable in structure, high in dewatering efficiency, and capable of improving paper machine operation speed and dryness degree of paper leaving a press part. The papermaking vacuum press roll comprises a roll body, a left roll shaft and a right roll shaft, wherein the left roll shaft and the right roll shaft are arranged at the left end and the right end of the roll body. The roll body is composed of a metal roll body and an extrusion layer on the outer surface of the circumference of the metal roll body. The metal roll body is provided with an inner cavity. The inner cavity is provided with a vacuum room. Mutually-communicated press holes are evenly distributed on surfaces of the extrusion layer and the metal roll body. Dewatering blind holes are further evenly distributed on positions staggered with the press holes on the surface of the extrusion layer. The depth of the dewatering blind holes is smaller than the thickness of the extrusion layer.

Description

A kind of papermaking suction press roll

Technical field

The utility model relates to paper machine press section equipment, particularly a kind of papermaking suction press roll.

Background technology

The effect of paper machine press section is to make the dehydration of l Water Paper page or leaf, and true pressure roller are main members of pressing device, are mainly used in pushing the paper pulp on the woollen blanket, extrude the moisture in the paper pulp.

Such as Fig. 1, pressure roller in the known press device of paper-making machine are comprised of roll body 1 ' and the roll shaft of being located at roll body 1 ' two ends, described roll body 1 ' is comprised of metallic roll body 11 ' and the extruded layer 12 ' of being located at metallic roll body 11 ' circumferential outer surface, described metallic roll body 11 ' has inner chamber 13 ', be provided with vacuum chamber in the described inner chamber, described extruded layer 12 ' surface is evenly equipped with the squeezing hole 14 ' that connects the metallic roll body surface, when page and woollen blanket enter the pressure roller of paper machine press section and suction press roll, woollen blanket is brought the middle moisture of page in the squeezing hole of suction press roll the inner chamber from the metallic roll body and is discharged, can not finish the moisture of extruding in the paper pulp during this suction press roll work, the humidity that page leaves press section is still very large, the squeezing effect is very bad, leave the mass dryness fraction of press section in order to improve page, prior art generally adopts the operating pressure that increases pressure roller or increases pressure roller to the extrusion time of l Water Paper page or leaf, the operating pressure that increases pressure roller has limitation, easy conquassation page, the increase pressure roller then can reduce production efficiency greatly to the extrusion time of l Water Paper page or leaf, for this reason, those skilled in the art once repaid examination and improved water separation capability by the quantity that increases squeezing hole, metallic roll surface, but too much the way of perforate has obviously reduced the bulk strength of pressure roller, affects its service life.

The utility model content

For the problems referred to above, the utility model proposes a kind of rational in infrastructure, dewatering efficiency is high, can improve the paper machine operation speed of a motor vehicle, the papermaking suction press roll of mass dryness fraction in the time of improving page and leave press section.

For solving this technical problem, the utility model is taked following scheme: a kind of papermaking suction press roll, comprise roll body and be located at left roll shaft and the right roll shaft at two ends, the roll body left and right sides, described roll body is comprised of metallic roll body and the extruded layer of being located at metallic roll body circumferential outer surface, described metallic roll body has inner chamber, be provided with vacuum chamber in the described inner chamber, described extruded layer surface is evenly equipped with the squeezing hole that connects the metallic roll body surface, the position of respectively squeezing the hole of staggering, described extruded layer surface also is evenly equipped with the dehydration blind hole, and the degree of depth of described dehydration blind hole is less than the thickness of extruded layer.

Further: described dehydration blind hole depth is 1/3rd of extruded layer thickness.

By adopting the aforementioned techniques scheme, the beneficial effects of the utility model are: this novel papermaking suction press roll position of respectively squeezing the hole of staggering on described extruded layer surface also is evenly equipped with the dehydration blind hole, the degree of depth of described dehydration blind hole is less than the thickness of extruded layer, under the prerequisite that does not affect suction press roll intensity, improved to greatest extent the percent opening on vacuum furnace surface, can adapt to higher operating speed, dewatering efficiency is high, during work, part water is under the squeezing effect of hole in pull of vacuum, discharge after entering the metallic roll intracoelomic cavity, some water throws away pressure roller surface by centrifugal force in the position away from nip through the dehydration blind hole, and water separation capability is good, improve the mass dryness fraction that page goes out press section, can improve the Forming Quality of page.

Description of drawings

Fig. 1 is known suction press roll sectional structure schematic diagram.

Fig. 2 is the utility model embodiment sectional structure schematic diagram.

The specific embodiment

Now with specific embodiment the utility model is further specified by reference to the accompanying drawings.

With reference to figure 2, present embodiment discloses a kind of papermaking suction press roll, comprise roll body 1 and be located at left roll shaft and the right roll shaft at two ends, roll body 1 left and right sides, described roll body 1 is comprised of metallic roll body 11 and the extruded layer 12 of being located at metallic roll body 11 circumferential outer surfaces, described metallic roll body 11 has inner chamber 13, be provided with vacuum chamber in the described inner chamber, described extruded layer 12 is evenly equipped with respectively the squeezing hole 14 that is interconnected with metallic roll body 11 surfaces, the stagger position of respectively squeezing hole 14, described extruded layer 12 surfaces also is evenly equipped with dehydration blind hole 15, and described dehydration blind hole 15 degree of depth are 1/3rd of extruded layer 12 thickness.

This novel papermaking suction press roll position of respectively squeezing the hole of staggering on described extruded layer surface also is evenly equipped with the dehydration blind hole, the degree of depth of described dehydration blind hole is less than the thickness of extruded layer, under the prerequisite that does not affect suction press roll intensity, improved to greatest extent the percent opening on vacuum furnace surface, can adapt to higher operating speed, dewatering efficiency is high, during work, part water is discharged after squeezing under the effect of hole in pull of vacuum, entering the metallic roll intracoelomic cavity, and some water is through the dehydration blind hole, throw away the pressure roller surface by centrifugal force in the position away from nip, water separation capability is good, has improved the mass dryness fraction that page goes out press section, can improve the Forming Quality of page.

The degree of depth of described dehydration blind hole is as long as just can realize the purpose of this utility model less than the thickness of extruded layer, above-mentioned dehydration blind hole depth is that 1/3rd of extruded layer thickness is preferential embodiment of the utility model, experimental results show that the dehydration blind hole depth is the water of bringing in the dehydration blind hole can well be thrown away the suction press roll surface in the position away from nip by centrifugal force three of extruded layer thickness/a period of time.

The above record, only for utilizing the embodiment of this origination techniques content, modification, variation that any those skilled in the art use this creation to do all belong to the claim that this creation is advocated, and are not limited to those disclosed embodiments.

Claims

1. papermaking suction press roll, comprise roll body and be located at left roll shaft and the right roll shaft at two ends, the roll body left and right sides, described roll body is comprised of metallic roll body and the extruded layer of being located at metallic roll body circumferential outer surface, described metallic roll body has inner chamber, be provided with vacuum chamber in the described inner chamber, described extruded layer surface is evenly equipped with the squeezing hole that connects the metallic roll body surface, it is characterized in that: the position of respectively squeezing the hole of staggering, described extruded layer surface also is evenly equipped with the dehydration blind hole, and the degree of depth of described dehydration blind hole is less than the thickness of extruded layer.

2. papermaking suction press roll according to claim 1, it is characterized in that: described dehydration blind hole depth is 1/3rd of extruded layer thickness.