CN214328298U

CN214328298U - Reverse dewatering device

Info

Publication number: CN214328298U
Application number: CN202022263632.0U
Authority: CN
Inventors: 李砚丰; 蔡敏; 于全武; 李树光; 朱小江; 吴莉莉
Original assignee: Hangzhou North Star Light Industry Machinery Co ltd
Current assignee: Hangzhou North Star Light Industry Machinery Co ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-10-01
Anticipated expiration: 2030-10-13

Abstract

The utility model discloses a reverse dewatering device, which aims to provide a reverse dewatering device for accelerating dewatering. The upper roll is arranged above the lower roll, the two ends of the upper roll and the two ends of the lower roll are both connected with the fixing frame, the upper roll and the lower roll are respectively connected with the fixing frame in a rotating mode, a gap is formed between the upper roll and the lower roll, a blanket is arranged in the gap, and the blanket is in rolling connection with the lower roll. The utility model has the advantages that: the dewatering device is characterized in that the dewatering device is dewatered by a gap formed by the upper roller and the lower roller, a blanket rolling along with the lower roller is arranged in the gap, the air pump removes water for the material through the upper roller, the air blowing hole blows water to the rear where the material advances, the suction pump sucks the water on the blanket through the lower roller, and the dewatering device achieves the effect of accelerating dewatering through extrusion, air blowing dewatering and water suction.

Description

Reverse dewatering device

Technical Field

The utility model belongs to the technical field of the relevant technique of manufacturing and specifically relates to a reverse dewatering device.

Background

In papermaking, the press dewatering of paper is in many forms, and the press roll is a main component of the press apparatus. The pressing roll has many kinds, the pressing part of the old paper machine mostly uses flat pressing roll, along with the increase of the speed of the paper machine, the vacuum pressing roll is used, then the groove pressing roll is developed, and the forms of blind hole pressing roll, controllable medium and high roll and the like are researched and developed in the 20 th century and the 70 th era. After absorbing the advantages of vacuum press rolls, grooved rolls and blind roll, several other new types of press rolls have appeared later. In the 80 s to 90 s, wide nip press and shoe press for high-speed paper machines were developed. Researchers have not stopped developing new press rolls for the purpose of improving dewatering efficiency, improving sheet quality, and reducing the adverse effects of pressing on the paper industry.

There are several categories: the flat roll press is used for both the normal press and the forward press. In the flat roll squeezing structure, the upper roll is a stone roll, the lower roll is a rubber roll, and the two rolls have smooth and flat roll surfaces. Stone rolls are a common flat press roll. The stone roll is generally made of a material that is easily peeled off from the paper, and granite is mostly used. Granite is mainly characterized in that the structure of granite has a plurality of tiny pores, certain air is stored, the peeling of wet paper sheets is facilitated, and the granite has the defects of high cost and easy brittle fracture. During operation, if the rotating speed is too high or the load is too large, the shaft head may be overheated, so that axial or annular cracks are generated on the surface of the stone roller, and the shaft center can fall off when the high-temperature expansion is serious; the method comprises the following steps of (1) carrying out mesh lining pressing, wherein the mesh lining pressing comprises two modes, namely mesh lining pressing and mesh covering pressing; vacuum pressing is widely used in medium and high speed paper machines. The upper press roll of the vacuum pressing is a stone roll, and the lower press roll is a vacuum press roll. The construction of the vacuum press roll is substantially the same as that of a vacuum couch roll, the roll shell is cast from bronze or stainless steel, and the thickness of the roll shell is determined by the required stiffness and strength. The thicker the roll shell is, the smaller the dewatering capacity is, without changing other working parameters of the paper machine, such as speed, vacuum degree and the like. During high-speed papermaking, moisture of the felt and wet paper is sucked out, passes through the holes on the roller, almost reaches the vacuum chamber, then passes through the vacuum water suction area, and is thrown into the white water tray by the centrifugal force of the roller. The vacuum chamber only serves to draw air from the apertures of the shell, the thicker the roll shell, the greater the volume of air drawn. Therefore, the vacuum press roller with the thin roller shell is made of high-strength metal, which is beneficial to improving the pressing and dewatering efficiency; the groove press, although having many advantages, has problems of large equipment investment, high production cost, and not long life. There are also a number of paper machines that have been modified to use grooved press rolls instead of vacuum press rolls.

The paper needs to be quickly dewatered, the paper mostly passes through a plurality of dewatering rollers in the conventional dewatering process, so that too much space is occupied, and the problem of accelerating dewatering still exists.

SUMMERY OF THE UTILITY MODEL

The utility model provides a reverse dewatering device for accelerating dewatering, which aims to overcome the defect of slow dewatering in papermaking in the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a reverse dewatering device, includes the mount, goes up roller and lower roll, last roller arrange the top of lower roll in, the both ends of going up the roller and the both ends of lower roll all are connected with the mount, last roller and lower roll rotate respectively with the mount and be connected, last roller and lower roll between be equipped with the clearance, the clearance in be equipped with the woollen blanket, woollen blanket and lower roll connection.

The mount is installed at last roller and lower roll both ends, goes up the roller in lower roller top, goes up roller and lower roll and all is the cylinder, goes up and forms the clearance between roller and the lower roll, and the material is put on the woollen blanket and when passing the clearance between roller and the lower roll along with the woollen blanket together, goes up roller and lower roll extrusion material, and the water on the material is then extruded the opposite direction of material motion and is absorbed by the woollen blanket, goes up the roller simultaneously and has the effect of dehydrating for the material, and the lower round has the effect of dehydrating for the woollen blanket, and the two combines to accelerate the dehydration.

Preferably, the two ends of the upper roller are provided with upper shafts, the upper roller is cylindrical, the outer side surface of the upper roller is provided with a plurality of air blowing holes, the air blowing holes are uniformly distributed on the outer side surface of the upper roller, one end of each upper shaft is connected with the upper roller, the other end of each upper shaft is connected with the fixing frame, one upper shaft is provided with an air inlet communicated with the air blowing holes, and the air inlet is connected with an air pump. The air pump supplies air to the inside of the upper roller through the upper shaft, the air is discharged through the air blowing holes, and water in the material can be further removed when the upper roller extrudes the material for dehydration.

Preferably, the lower roll is provided with lower shafts at two ends, the lower roll is cylindrical, a plurality of water suction holes are formed in the outer side surface of the lower roll, the water suction holes are uniformly distributed in the outer side surface of the lower roll, one end of each lower shaft is connected with the lower roll, the other end of each lower shaft is connected with the fixing frame, one lower shaft is provided with a water outlet communicated with the water suction holes, and the water outlet is connected with a suction pump. The suction pump sucks water on the blanket through the water suction holes, so that the blanket is more favorable for sucking water on substances, and the dewatering effect of the blanket is accelerated.

Preferably, the cross section of the air blowing hole is arc-shaped, a vent hole is formed in the middle inside the upper roller, one end of the air blowing hole is arranged on the outer side surface of the upper roller, the other end of the air blowing hole is communicated with the vent hole in the upper roller, the diameter of the air blowing hole is gradually reduced from the outer side surface of the upper roller to the vent hole in the upper roller, and the air blowing hole is communicated with an air inlet hole in the upper shaft through the vent hole. The material and the blanket move forwards and are dehydrated through the upper roller, and when the air blowing holes in the upper roller rotate to the lower part and are contacted with the material, water on the material can be blown towards the rear, so that the material passing through the upper roller and the lower roller is dehydrated more quickly.

Preferably, a water through hole is formed in the middle inside the lower roller, one end of the water suction hole is arranged on the outer side surface of the lower roller, the other end of the water suction hole is communicated with the water through hole in the lower roller, the diameter of the water suction hole is gradually reduced from the outer side surface of the lower roller to the water through hole in the lower roller, and the water suction hole is communicated with a water outlet hole in the lower shaft through the water through hole. The water on the blanket is quickly absorbed, and the blanket is accelerated to dehydrate the substance.

Preferably, the blanket is integrally formed. Is beneficial to the water absorption of the blanket.

The utility model has the advantages that: the dewatering device is characterized in that the dewatering device is dewatered by a gap formed by the upper roller and the lower roller, a blanket rolling along with the lower roller is arranged in the gap, the air pump removes water for the material through the upper roller, the air blowing hole blows water to the rear where the material advances, the suction pump sucks the water on the blanket through the lower roller, and the dewatering device achieves the effect of accelerating dewatering through extrusion, air blowing dewatering and water suction.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view at a-a of fig. 1.

In the figure: 1. the novel water suction device comprises a fixing frame, 2 parts of an upper roller, 3 parts of a lower roller, 4 parts of a gap, 5 parts of a blanket, 6 parts of an upper shaft, 7 parts of a gas blowing hole, 8 parts of a gas inlet hole, 9 parts of a gas pump, 10 parts of a lower shaft, 11 parts of a water suction hole, 12 parts of a water outlet hole, 13 parts of a suction pump, 14 parts of a vent hole and 15 parts of a water through hole.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description.

In the embodiment shown in fig. 1 and 2, the reverse dehydration device comprises a fixed frame 1, an upper roller 2 and a lower roller 3, wherein the upper roller 2 is arranged above the lower roller 3, two ends of the upper roller 2 and two ends of the lower roller 3 are both connected with the fixed frame 1, the upper roller 2 and the lower roller 3 are respectively connected with the fixed frame 1 in a rotating way, a gap 4 is arranged between the upper roller 2 and the lower roller 3, a blanket 5 is arranged in the gap 4, the blanket 5 is connected with the lower roller 3 in a rolling way, two ends of the upper roller 2 are provided with upper shafts 6, the upper roller 2 is cylindrical, the outer side surface of the upper roller 2 is provided with a plurality of air blowing holes 7, the air blowing holes 7 are uniformly distributed on the outer side surface of the upper roller 2, one end of each upper shaft 6 is connected with the upper roller 2, the other end of each upper shaft 6 is connected with the fixed frame 1, one upper shaft 6 is provided with an air inlet hole 8 communicated with the air blowing hole 7, the air pump 9 is connected with the air pump 8, two ends of the lower shaft 10 are arranged at two ends of the lower roller 3, the lower roller 3 is cylindrical, the outer side surface of the lower roller 3 is provided with a plurality of water suction holes 11, the water suction holes 11 are uniformly distributed on the outer side surface of the lower roller 3, one end of a lower shaft 10 is connected with the lower roller 3, the other end of the lower shaft 10 is connected with a fixed frame 1, one lower shaft 10 is provided with a water outlet hole 12 communicated with the water suction holes 11, the water outlet hole 12 is connected with a suction pump 13, the cross section of an air blowing hole 7 is arc-shaped, the middle inside of an upper roller 2 is provided with an air vent 14, one end of the air blowing hole 7 is arranged on the outer side surface of the upper roller 2, the other end of the air blowing hole 7 is communicated with the air vent 14 in the upper roller 2, the diameter of the air blowing hole 7 is gradually reduced from the outer side surface of the upper roller 2 to the air vent 14 in the upper roller 2, the air blowing hole 7 is communicated with an air inlet hole 8 on the upper shaft 6 through the air vent 14, the middle inside of the lower roller 3 is provided with a water vent 15, one end of the water suction holes 11 is arranged on the outer side surface of the lower roller 3, the other end of the water suction hole 11 is communicated with a water through hole 15 in the lower roller 3, the diameter of the water suction hole 11 is gradually reduced from the outer side surface of the lower roller 3 to the water through hole 15 in the lower roller 3, the water suction hole 11 is communicated with a water outlet hole 12 on the lower shaft 10 through the water through hole 15, and the blanket 5 is integrally formed.

As shown in figure 1, an upper roll 2 is arranged at the upper end of a fixed frame 1, a lower roll 3 is arranged at the lower end of the fixed frame 1, the lower roll 3 is arranged below the upper roll 2, an upper shaft 6 is respectively and fixedly arranged at the left end and the right end of the upper roll 2, the upper roll 2 is arranged on the fixed frame 1 through the upper shaft 6, the upper shaft 6 is rotatably connected with the fixed frame 1, an air inlet hole 8 is arranged at the end surface center of one end of the upper shaft 6, which is connected with the fixed frame 1, the upper roll 2 is in a cylinder shape, a plurality of air blowing holes 7 are arranged on the outer side cylindrical surface of the upper shaft 6, an air pump 9 is arranged on the air inlet hole 8, the air pump 9 is connected with the upper shaft 6 in a rotating and sealing manner, a lower roll 10 is respectively and fixedly arranged at the left end and the right end of the lower roll 3, a water outlet hole 12 is arranged at the end surface center of one end of the lower roll 10, which is connected with the fixed frame 1, the upper roll 2 is in a cylinder shape, a plurality of water suction holes 11 are arranged on the outer side cylindrical surface, a water outlet hole 12 of the lower roll 10 is communicated with the water inlet hole 11 of the lower roll 3, the water outlet hole 12 is connected with a suction pump 13, and the suction pump 13 is connected with the lower shaft 10 in a rotating and sealing way.

As shown in figure 2, a gap 4 is formed between an upper roller 2 and a lower roller 3, a felt 5 is arranged in the gap 4, the cross section of a blowing hole 7 of the upper roller 2 is arc-shaped, the blowing hole 7 is communicated with the inside and the outside of the upper roller 2, the blowing hole 7 is distributed in the upper roller 2 in an impeller-shaped circumferential arrangement mode, a water suction hole 11 of the lower roller 3 is in a frustum shape, the axis of the frustum is vertical to the cylindrical surface of the lower roller 3, wet paper is arranged on the felt 5 and is squeezed and dewatered by the upper roller 2 and the lower roller 3 when the felt 5 passes through the gap 4, the dewatered water is absorbed by the felt 5, when the upper roller 2 contacts the wet paper and begins to squeeze, an air pump 9 begins to blow the water in the wet paper to the rear lower part of the wet paper through the blowing hole 7, and when the lower roller 3 contacts the felt 5 and begins to squeeze, a suction pump 13 sucks the water on the felt 5 through the water suction hole 11.

Claims

1. The utility model provides a reverse dewatering device, characterized by includes mount (1), goes up roller (2) and lower roll (3), last roller (2) arrange the top of lower roll (3) in, the both ends of going up roller (2) and the both ends of lower roll (3) all are connected with mount (1), last roller (2) and lower roll (3) rotate with mount (1) respectively and be connected, last roller (2) and lower roll (3) between be equipped with clearance (4), clearance (4) in be equipped with woollen blanket (5), woollen blanket (5) and lower roll (3) roll connection.

2. The reverse dehydration device according to claim 1, characterized in that both ends of the upper roll (2) are provided with upper shafts (6), the upper roll (2) is cylindrical, the outer side surface of the upper roll (2) is provided with a plurality of air blowing holes (7), the air blowing holes (7) are uniformly distributed on the outer side surface of the upper roll (2), one end of each upper shaft (6) is connected with the upper roll (2), the other end of each upper shaft (6) is connected with the fixing frame (1), one upper shaft (6) is provided with an air inlet hole (8) communicated with the air blowing hole (7), and the air inlet hole (8) is connected with an air pump (9).

3. The reverse dewatering device according to claim 1 or 2, characterized in that lower shafts (10) are arranged at two ends of the lower roll (3), the lower roll (3) is cylindrical, a plurality of water suction holes (11) are arranged on the outer side surface of the lower roll (3), the water suction holes (11) are uniformly distributed on the outer side surface of the lower roll (3), one end of the lower shaft (10) is connected with the lower roll (3), the other end of the lower shaft (10) is connected with the fixing frame (1), one of the lower shafts (10) is provided with a water outlet hole (12) communicated with the water suction hole (11), and the water outlet hole (12) is connected with a suction pump (13).

4. The reverse dewatering device according to claim 2, characterized in that the cross section of the blowing hole (7) is arc-shaped, a vent hole (14) is formed in the middle of the inside of the upper roller (2), one end of the blowing hole (7) is arranged on the outer side surface of the upper roller (2), the other end of the blowing hole (7) is communicated with the vent hole (14) in the upper roller (2), the diameter of the blowing hole (7) is gradually reduced from the outer side surface of the upper roller (2) to the vent hole (14) in the upper roller (2), and the blowing hole (7) is communicated with the air inlet hole (8) in the upper shaft (6) through the vent hole (14).

5. A reverse dewatering apparatus according to claim 3, characterized in that a water through hole (15) is provided in the middle of the inside of the lower roll (3), one end of the water suction hole (11) is provided on the outer side surface of the lower roll (3), the other end of the water suction hole (11) is communicated with the water through hole (15) in the lower roll (3), the diameter of the water suction hole (11) is gradually reduced from the outer side surface of the lower roll (3) to the water through hole (15) in the lower roll (3), and the water suction hole (11) is communicated with the water outlet hole (12) in the lower roll (10) through the water through hole (15).

6. A reverse dewatering apparatus according to claim 1, characterised in that the felt (5) is formed integrally.