CN210766179U

CN210766179U - Spraying device for reducing paper warping

Info

Publication number: CN210766179U
Application number: CN201920963749.4U
Authority: CN
Inventors: 魏兵; 羊益军; 陈学海
Original assignee: Hubei Changjiang Huifeng Paper Co ltd
Current assignee: Hubei Changjiang Huifeng Paper Co ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-06-16
Anticipated expiration: 2029-06-25

Abstract

The utility model discloses a atomizer for reducing paper warpage. The utility model discloses a be used for reducing the warping atomizer of paper, atomizer set up the paper back between two coating deflector rolls, and atomizer includes spraying head subassembly, breather pipe and steam engine, and the spraying head subassembly is linked together through breather pipe and steam engine, and the spraying direction of spraying head subassembly is towards the paper back. The utility model discloses a atomizer for reducing paper warpage is towards paper spraying, and the paper back itself has certain hydroscopicity, so can absorb partly steam and get into the paper surface, forms the humidification effect of certain degree, has certain humidification effect to the back of paper through steam, increases the moisture of back paper for the paper is positive approximately the same with the moisture at the back, has just so solved paper warpage problem, has also saved a large amount of manufacturing cost.

Description

Spraying device for reducing paper warping

Technical Field

The utility model relates to a papermaking technical field especially relates to a atomizer for reducing paper warpage.

Background

The grey-coated white board produced by a paper mill often has the problem of upwarping of paper, and the meaning of the grey-coated white board is as follows: the packing paper is divided into a plurality of types, and the front surface of the packing paper is paper surface which is subjected to coating and finishing treatment and has the characteristics of printing, coating and the like. The reverse side is generally used on the inner side of a packaging box, so that only the front side is coated and finished during production, the reverse side is in a raw paper state, the reverse side has certain water resistance, namely the color of the paper is the same as that of the paper, the gray reverse side is generally few at present, the raw material of the original gray reverse side is made of newspaper pulp, the newspaper is few in the market at present and basically is replaced by yellow board paper, and most of the produced reverse side is yellow at present, but is also named as gray bottom coated white board paper; because the paper is difficult to enter the printing machine of the printing factory for smooth printing after being upwarped, or the printing speed is difficult to increase after entering the printing machine. After seriously affecting the printing efficiency, the dealer will make amendments or even claims to the paper making unit. Causes of paper warpage: the front and back surfaces of the paper are subjected to different tensile forces and different moisture contents, and the paper warps towards the surface with high moisture content of the paper within a certain range; the warping of paper is affected by different chemical engineering on the surface, the front surface of the grey white board paper is finished by coating, and the glue content in the coating is far greater than that of the back raw material, so that the paper warps due to the fact that tensile force is drawn to the front surface when the paper is dried through thermal shrinkage and the like; the paper mill generally encounters such problems and adopts a way of adding a coating back roll on the back paper to apply glue to change the warping phenomenon of the paper; but the cost is very high, and the cost of glue, steam, power consumption and the like used for the exchange and warping in one day is tens of thousands yuan.

Disclosure of Invention

An object of the utility model is to provide a be used for reducing the warping atomizer of paper to the aforesaid of prior art not enough.

The utility model discloses a be used for reducing warping atomizer of paper, atomizer sets up the back at the paper that is located between two coating deflector rolls, atomizer includes spraying head subassembly, breather pipe and steam engine, spraying head subassembly passes through the breather pipe with the steam engine is linked together, spraying head subassembly's spraying direction orientation the back of paper.

Preferably, the spraying device is arranged below the paper between two coating guide rollers below the coating bridge box.

Preferably, the spray head assembly comprises a shell with an open top end and a steam main pipe arranged at the bottom end in the shell, the steam main pipe is communicated with the steam engine through the vent pipe, two ends of the steam main pipe are both open, and the pipe wall of the steam main pipe is provided with a plurality of vent holes communicated with the interior of the steam main pipe;

preferably, the atomising head subassembly still includes a plurality of ventilative boards, all is equipped with a plurality of bleeder vents that run through it on a plurality of ventilative boards, and is a plurality of ventilative board by the casing bottom sets up to top direction horizontal interval in the casing, the steam is responsible for the below that is located the ventilative board of least significant end, by the aperture of the bleeder vent on the ventilative board that the casing lower extreme set gradually to the top direction reduces in proper order.

Preferably, the number of the air permeable plates is 3.

Preferably, the distance between the air-permeable plate positioned at the topmost end and the paper positioned right above the air-permeable plate is 30mm-50 mm.

Preferably, a valve for adjusting the flow rate of the vent pipe is arranged on the vent pipe.

Preferably, the bottom end of the shell is also provided with a water outlet communicated with the interior of the shell, and the water outlet is communicated with a condensed water drain pipe.

The utility model discloses a atomizer for reducing paper warpage is towards paper spraying, and the paper back itself has certain hydroscopicity, so can absorb partly steam and get into the paper surface, forms the humidification effect of certain degree, has certain humidification effect to the back of paper through steam, increases the moisture of back paper for the paper is positive approximately the same with the moisture at the back, has just so solved paper warpage problem, has also saved a large amount of manufacturing cost.

Drawings

Fig. 1 is a schematic structural diagram of a spraying device for reducing paper warpage according to the present invention;

fig. 2 is a schematic structural view of the spray head assembly of the present invention.

1. A spraying device; 2. coating a guide roller; 3. a spray head assembly; 31. a housing; 32. a main steam pipe; 321. A vent hole; 33. a gas permeable plate; 331. air holes are formed; 4. a breather pipe; 41. a valve; 5. a steam engine; 6. Coating a bridge box; 7. and a condensed water drain pipe.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, the utility model discloses a spraying device for reducing paper warpage, spraying device 1 set up the paper back between two coating deflector rolls 2, and spraying device 1 includes spraying head subassembly 3, breather pipe 4 and steam engine 5, and spraying head subassembly 3 is linked together through breather pipe 4 and steam engine 5, and the spraying direction of spraying head subassembly 3 is towards the paper back.

The utility model discloses a atomising head subassembly 3 towards the paper spraying for reducing the warping atomizer of paper, the paper back itself has certain hydroscopicity, so can absorb partly steam and get into the paper surface, form the humidification effect of certain degree, have certain humidification effect to the back of paper through steam, increase the moisture of back paper for the paper is positive approximately the same with the moisture at the back, has just so solved paper warpage problem, has also saved a large amount of manufacturing cost.

The coating machine is provided with a plurality of coating guide rollers 2, the spraying device 1 can be arranged between any two coating guide rollers 2 which are convenient to spray, and the spraying device 1 can also be arranged below the paper between the two coating guide rollers 2 positioned below the coating bridge box 6. The coating bridge box 6 is a main component of the coating machine, the coating bridge box 6 is used for drying the coating on the front surface of the paper, and the spraying device 1 is arranged below the coating bridge box 6 and can eliminate the steam water drops sprayed to the periphery through the drying hot air of the bridge box, thereby reducing the water drops of the steam fog.

The structure of the spray head assembly 3 is various, and is not limited herein, in this embodiment, the spray head assembly 3 may include a housing 31 with an open top end and a main steam pipe 32 disposed in the housing 31, the main steam pipe 32 is communicated with the steam engine 5 through a vent pipe 4, both ends of the main steam pipe 32 are open, and a plurality of vent holes 321 are disposed on a pipe wall of the main steam pipe 32 and communicated with the inside of the main steam pipe; when the steam is sent into the main steam pipe 32 through the vent pipe 4, the steam is discharged through the vent holes 321 of the main steam pipe 32

As shown in fig. 2, the atomizing head assembly 3 further includes a plurality of vent plates 33, a plurality of air holes 331 penetrating through the vent plates 33 are formed in the plurality of vent plates 33, the plurality of vent plates 33 are horizontally arranged in the casing 31 at intervals from the bottom end of the casing 31 to the top end direction in sequence, the steam main pipe 32 is located below the lowest vent plate 33, and the diameters of the air holes 331 formed in the vent plates 33 arranged in sequence from the bottom end of the casing 31 to the top end direction are sequentially reduced. After the steam is sent into the steam main pipe 32, the steam is discharged into the shell 31 through the vent holes 321 in the steam main pipe 32, the steam enters the shell 31 and is upwards sprayed through the vent holes 331 of the plurality of vent plates 33 in sequence, finally, relatively uniform steam is formed and is sprayed in a mist shape through the vent plate 33 at the topmost end to be contacted with the back surface of the paper, and the back surface of the paper has certain water absorption, so that part of the steam can be absorbed to enter the surface of the paper, and a certain humidification effect is formed.

The number of the air-permeable plates 33 is not too large or too small, so that steam is not sprayed out of the paper to contact with the paper, and if the number of the air-permeable plates is too small, the air is not uniformly sprayed, and the number of the air-permeable plates can be 3.

The distance between the air-permeable plate 33 positioned at the topmost end and the paper positioned directly above the air-permeable plate is 30mm-50 mm. Too large a distance tends to result in steam that is not ultimately well ejected out of contact with the paper, too small a distance causes the air to be ejected less uniformly,

the vent pipe 4 is provided with a valve 41 for adjusting the flow rate. The valve 41 controls the air injection amount, and the air injection amount can be adjusted according to different paper types, so that the paper is suitable for preventing the paper from warping.

The bottom end of the housing 31 may further be provided with a drain opening 311 communicated with the inside thereof, and the condensed water drain pipe 7 is communicated with the drain opening 311 for draining condensed water accumulated in the housing.

The above is not relevant and is applicable to the prior art.

Although certain specific embodiments of the present invention have been described in detail by way of illustration, it will be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention, which is to be construed as broadly as the present invention will suggest themselves to those skilled in the art to which the invention pertains and which is susceptible to various modifications or additions and similar arrangements to the specific embodiments described herein without departing from the scope of the invention as defined in the appended claims. It should be understood by those skilled in the art that any modifications, equivalent substitutions, improvements and the like made to the above embodiments according to the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A spraying device for reducing paper warpage, characterized by: atomizer (1) sets up the back at the paper that is located between two coating deflector rolls (2), atomizer (1) includes spraying head subassembly (3), breather pipe (4) and steam engine (5), spraying head subassembly (3) pass through breather pipe (4) with steam engine (5) are linked together, the spraying direction orientation of spraying head subassembly (3) the back of paper.

2. A spray device for reducing paper warping as claimed in claim 1, wherein: the spraying device (1) is arranged below the paper between the two coating guide rollers (2) below the coating bridge box (6).

3. A spray device for reducing paper warping as claimed in claim 2, wherein: the spraying head assembly (3) comprises a shell (31) with an open top end and a steam main pipe (32) arranged in the shell (31), the steam main pipe (32) is communicated with the steam engine (5) through the vent pipe (4), two ends of the steam main pipe (32) are open, and a plurality of vent holes (321) communicated with the inside of the steam main pipe are formed in the pipe wall of the steam main pipe.

4. A spray device for reducing paper warping as claimed in claim 3, wherein: the spraying head assembly (3) further comprises a plurality of ventilating plates (33), a plurality of ventilating holes (331) penetrating through the ventilating plates (33) are formed in the ventilating plates (33), the ventilating plates (33) are sequentially arranged in the shell (31) from the bottom end to the top end at horizontal intervals, the steam main pipe (32) is located below the ventilating plate (33) at the lowest end, and the hole diameters of the ventilating holes (331) in the ventilating plates (33) sequentially arranged from the lower end of the shell (31) to the top end are sequentially reduced.

5. A spray device for reducing paper warping as claimed in claim 4, wherein: the number of the breathable plates (33) is 3.

6. A spray device for reducing paper warping as claimed in claim 4, wherein: the distance between the air-permeable plate (33) at the topmost end and the paper positioned right above the air-permeable plate is 30mm-50 mm.

7. A spraying device for reducing paper sheet warping as claimed in any one of claims 1 to 6, wherein: the breather pipe (4) is provided with a valve (41) for adjusting the flow of the breather pipe.

8. A spraying device for reducing paper sheet warping as claimed in any one of claims 3 to 6, wherein: the bottom end of the shell (31) is also provided with a water outlet (311) communicated with the interior of the shell, and a condensed water drain pipe (7) is communicated with the water outlet (311).