CN216231209U - Air box applied to printing paper flattening device and flattening device - Google Patents

Abstract

The utility model provides a wind box and a flattening device applied to a printing paper flattening device, wherein the wind box comprises a box body and a box cover which are connected with each other; an air inlet is formed in one side, away from the box cover, of the box body and is connected with a first air storage cavity, and the first air storage cavity is formed in the box body; the box body is provided with an air outlet which is connected with a second air storage cavity, and the second air storage cavity is arranged inside the box body; the first air storage cavity is connected with the second air storage cavity through a first channel; the air outlet comprises a first guide groove and a second guide groove which are arranged in parallel; a first exhaust hole is formed in the first diversion trench; the inside second exhaust hole that is provided with of second guiding gutter, the diameter in first exhaust hole is less than the diameter in second exhaust hole. The wind box is small in section size, regular in shape, small in overall structure size of the flattening device, high in space adaptability, simple in field arrangement and adjustment and stable in flattening effect on printing paper.

Description

Air box applied to printing paper flattening device and flattening device

Technical Field

The utility model relates to the technical field of printed product quality detection, in particular to a wind box and a flattening device applied to a printed paper flattening device.

Background

With the continuous development of the printing industry, the requirements on the quality of printed products are higher and higher. In the printing industry, a visual inspection system is generally adopted to detect the quality of a printed product in real time. When the visual inspection system is adopted to carry out quality inspection on the printed products, the stable motion of the printed products needs to be ensured. The printed product generally refers to printing paper, and the movement of the printing paper controls the gripper to grip the paper head through the printing unit so as to drive the printing paper to move. When the gripper holds the paper head and moves on the roller and transmits between the rollers, the printing paper can receive the combined action of air resistance, centrifugal force, paper head driving force, self internal stress of the printing paper and the like, so that the printing paper can move irregularly and unstably such as up-and-down fluctuation, paper edge warping, left-and-right deflection and the like, the state of the printing paper is further unstable, and the printing paper has local deformation. The instability of the state of the printing paper, namely the local deformation of the printing paper can seriously affect the imaging quality of the visual detection system, and further affect the detection precision of the visual detection system on the defects of the printing paper.

In the prior art, the partially deformed printing paper is generally flattened by a flattening system to ensure that the imaging quality of the visual inspection system is not affected by the local deformation of the printing paper. As shown in fig. 1, the flattening system specifically includes: blowing flattening device, air cleaner, turbo fan and tuber pipe. When the offset press works, the impression cylinder rotates anticlockwise, one end of a printed product, namely printing paper, is fixed on the impression cylinder, the other end of the printed product is in a free state, and the printed product, namely the printing paper, deviates from the surface of the impression cylinder under the action of centrifugal force. The blowing and flattening device is installed at a position close to an impression cylinder of the offset press, when the offset press normally operates, the turbo fan starts to work, air enters the turbo fan through the air filter, strong air flow formed by the turbo fan enters the two ends of the blowing and flattening device through the air pipe a and the air pipe b and is blown out from a panel of the blowing and flattening device, the strong air flow acts on the surface of a printing product, the printing product can be tightly attached to the surface of the impression cylinder under the action of the strong air flow, and the printing product, namely the printing paper is flattened.

However, the diameter of the air pipe adopted by the existing flattening system is large, so that the integral structure size of the flattening system is large, the field installation and arrangement are difficult, and the space adaptability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides an air box and a flattening device applied to a printed paper flattening device, and aims to solve the problems that the overall structure size of a flattening system is large, field installation and arrangement are difficult, and space adaptability is poor due to the fact that the diameter of an air pipe is large in the prior art.

In one aspect, the present invention provides a wind box applied to a printing paper flattening apparatus, wherein the wind box is designed to be a rectangular multi-cavity structure, and comprises: a case body and a case cover connected to each other;

at least two air inlets are formed in one side, away from the box cover, of the box body, the at least two air inlets are arranged on the same central axis and are connected with a first air storage cavity, and the first air storage cavity is arranged inside the box body;

the box body is provided with an air outlet, the air outlet is arranged at one end far away from at least two air inlets, the air outlet is connected with a second air storage cavity, and the second air storage cavity is arranged inside the box body;

the first air storage cavity is connected with the second air storage cavity through a first channel arranged inside the box body;

the air outlet is arranged on one side far away from the first channel and comprises a first diversion trench and a second diversion trench, and the first diversion trench and the second diversion trench are arranged in parallel;

at least two first exhaust holes are formed in the first diversion trench, and the first exhaust holes are communicated with one another;

at least two second exhaust holes are formed in the second diversion trench, the second exhaust holes are communicated with one another, and the diameter of the first exhaust hole is smaller than that of the second exhaust hole.

Among the above-mentioned technical scheme, be different diameters with first exhaust hole and second exhaust hole design, can play different effects to the exhibition of printing paper, the ascending warpage of printing paper is resisted to second exhaust hole mainly used, and first exhaust hole is used for pacifying the printing paper. In addition, the first guide groove and the second guide groove are both designed into long and narrow gaps, so that air flow sprayed forwards and backwards can be effectively inhibited.

In a preferred embodiment of the present invention, a supporting surface structure formed by bonding the first gas storage cavity and the second gas storage cavity by using an adhesive is further included between the first gas storage cavity and the second gas storage cavity; the supporting surface structure is arranged in the box body and the box cover and between the first air storage cavity and the second air storage cavity and used for separating the first channels to form an intermittent structure.

In a preferred embodiment of the utility model, at least two of the air inlets are evenly distributed in the region of the first air reservoir and the distances between the air inlets are equal.

In a preferred embodiment of the present invention, at least two first exhaust holes are uniformly distributed inside the first guiding gutter, and the distance between the first exhaust holes is equal.

In a preferred embodiment of the present invention, at least two second exhaust holes are uniformly distributed inside the second guiding groove, and the distances between the second exhaust holes are equal.

In another aspect, the present invention also provides a flattening apparatus, including: the air box comprises an air box body, air source equipment and a main air inlet pipe, wherein one end of the main air inlet pipe is connected with at least two air inlets of the air box body respectively through quick-insertion variable-diameter equipment, and the other end of the main air inlet pipe is connected with the air source equipment.

Among the above-mentioned technical scheme, insert reducing equipment soon and can adopt and insert reducing tee bend soon or insert reducing cross soon to turn into a plurality of from intake pipe with a main intake pipe, with connecting a plurality of air inlets respectively.

In a preferred embodiment of the present invention, the flattening device further includes a roller, and the wind box is disposed outside the roller and parallel to the camera shooting line.

In a preferred embodiment of the utility model, the wind box is arranged on one side of the printing paper, the distance between the wind box and the printing paper is 6mm-15mm, and the printing paper is attached to the roller.

In a preferred embodiment of the present invention, a distance between the camera photographing line and the wind box is set to be 2mm to 10 mm.

In a preferred embodiment of the present invention, the air supply device employs an air compressor capable of providing compressed air.

In a preferred embodiment of the utility model, the main air inlet pipe comprises a hard pipe and a hose, and the hard pipe is used in a flattening device with the linear distance between the air source equipment and the wind box being more than 10 m; the hose is used in a flattening device, wherein the straight line distance between the air source equipment and the wind box is not more than 10 m.

Compared with the prior art, the air box and the flattening device applied to the printed paper flattening device provided by the utility model have the following beneficial effects:

(1) the air box is designed into a multi-cavity split type design structure, and the air entering the air box can be uniformly compressed for many times through the first air storage cavity and the second air storage cavity in the air box, so that the pressure of the air is kept consistent in the length direction of the air box, the air flow pressure near different air exhaust holes (including the first air exhaust hole and the second air exhaust hole) is basically consistent, the stability of the air flow exhausted by the different air exhaust holes is ensured, and the stable flattening effect of printing paper is further ensured.

(2) The first gas storage cavity and the second gas storage cavity are arranged in an intermittent structure, so that the gas pressure area borne by the box cover can be greatly reduced, and the box cover is prevented from being greatly deformed under pressure.

(3) The connection between the box body and the box cover of the wind box is formed by combining gluing and threaded connection, so that the connection reliability of the wind box can be ensured, and the sealing of the internal cavity structure of the wind box can be ensured.

(4) When the wind box is used, the long edge (namely the edge of 80 mm) is basically vertical, the transverse rigidity of parts is greatly enhanced, the two ends of the wind box only need to be fixed when the length of the wind box exceeds 1m, and the middle part of the wind box is not bent.

(5) The air inlet pipe used by the wind box is smaller in diameter, the cross section of the wind box is smaller in size, the wind box is regular in shape, the whole structure of the flattening device is smaller in size, the space adaptability is higher, the field arrangement and adjustment are simple, and the flattening effect on printing paper is stable.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a flattening system of the prior art;

FIG. 2 is a schematic structural diagram of a blowing and flattening device for printing paper in the prior art;

fig. 3 is a schematic view of the overall structure of a wind box applied to a printing paper flattening device in embodiment 1 of the present invention;

fig. 4 is a schematic cross-sectional view of a first air box applied to a printing paper flattening apparatus according to embodiment 1 of the present invention;

fig. 5 is a schematic cross-sectional view of a second air box applied to a printing paper flattening apparatus according to embodiment 1 of the present invention;

fig. 6 is a partial bottom structural view of a wind box applied to a printing paper flattening apparatus according to embodiment 1 of the present invention;

fig. 7 is a schematic structural view of a flattening device according to embodiment 2 of the present invention;

description of reference numerals:

FIG. 1: 1-1, a blowing and flattening mechanism; 2-1, camera scan line; 2-2, imaging points of a camera; 2-3, printing a product; 2-4, an impression cylinder;

FIG. 2, 1, air inlet; 2. a wind pipe cavity; 3. an air outlet;

fig. 3 to 7: 1-a wind box, 10-a box body, 11-a box cover, 12-an air inlet, 13-a first air storage cavity, 14-an air outlet, 15-a second air storage cavity, 16-a first channel, 17-a supporting surface structure, 18-a fixing screw, 19-a first diversion trench, 20-a second diversion trench, 21-a first exhaust hole and 22-a second exhaust hole; 2-gas source equipment; 3-main air inlet pipe; 4-a roller; 5-printing paper; 6-detecting a paper sheet; 7-camera shooting line.

Detailed Description

To make the objects, embodiments and advantages of the present invention clearer, exemplary embodiments of the present invention will be described more clearly and completely with reference to the accompanying drawings in exemplary embodiments of the present invention, and it is to be understood that the exemplary embodiments described are only a part of the embodiments of the present invention, and not all of the embodiments.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

All other embodiments, which can be derived by a person skilled in the art from the described exemplary embodiments of the utility model without inventive step, are within the scope of the utility model as claimed. In addition, while the present disclosure has been described in terms of one or more exemplary embodiments, it is to be understood that each aspect of the disclosure can independently constitute a complete embodiment.

It should be noted that the brief descriptions of the terms in the present invention are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of the present invention. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.

In order to facilitate the technical solution of the present application, some concepts related to the present invention will be described below.

The paper head is gripped by the grippers from the paper delivery of the printing paper 5 to the paper delivery of the printing paper 5, namely, only the state of the paper head is limited in the moving process of the printing paper 5, and other parts of the printing paper 5 are all in a free state.

In the present disclosure, terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations. In addition, the terms "comprise," "include," "for," "primarily for," or any other variation, are intended to cover a non-exclusive inclusion, such that it includes not only the elements explicitly listed, but also other elements not explicitly listed. Also, the words "inside", "outside", "upper", "lower", etc. describing the orientation in the present invention are described with reference to the position of the drawings of the present invention or the orientation of the product in actual use, and thus do not make the solution of the present invention unclear.

In addition to the flattening system disclosed in the background of the present invention, as shown in fig. 2, the prior art further includes a printing paper blowing flattening apparatus, including: the air pipe comprises an air inlet, an air pipe cavity and more than one air outlet, wherein the area of the inner section of the air pipe cavity is larger than or equal to that of the air inlet, the area of the air inlet is larger than or equal to that of the total air outlet, all the air outlets are kept on the same plane and have the same area, the middle air outlet is vertical to the air pipe cavity, and the other air outlets except the middle air outlet are inclined by 0-10 degrees towards two sides relative to the middle air outlet. However, in practical use of the blowing and flattening device for printing paper shown in fig. 2, it is necessary to ensure that the middle position of the printing paper is consistent with the middle position of the air duct, so that the flattening effect on the printing paper cannot be ensured, and when the flattening is not good, the number of the air ducts needs to be increased at the middle position, so as to increase the density and ensure the flattening effect; and the arrangement angles of the air pipes at different positions are different, the manufacturing process is complex, the overall structure size of the printing paper blowing and flattening device is large, and the space adaptability is poor.

Example 1

Referring to fig. 3 to 6, the present embodiment 1 provides a wind box applied to a printing paper flattening apparatus, and as shown in fig. 3 and 4, the wind box 1 is designed in a rectangular multi-chamber structure, and includes: a case body 10 and a case cover 11 connected to each other;

as shown in fig. 3, at least two air inlets 12 are disposed on one side of the box body 10 away from the box cover 11, the at least two air inlets 12 are disposed on the same central axis, as shown in fig. 4, the air inlets 12 are both connected with a first air storage cavity 13, the first air storage cavity 13 is disposed inside the box body 10, and an arrow in fig. 4 indicates a direction in which compressed air flows inside the box body 10 of the wind box 1;

as shown in fig. 6, an air outlet 14 is arranged on the box body 10, and the air outlet 14 is arranged at one end far away from at least two air inlets 12, as shown in fig. 4, the air outlet 14 is connected with a second air storage cavity 15, and the second air storage cavity 15 is arranged inside the box body 10;

as shown in fig. 5, the first air storage cavity 13 is connected with the second air storage cavity 15 through a first channel 16 arranged inside the box body 10, and a supporting surface structure 17 formed by bonding with an adhesive is further included between the first air storage cavity 13 and the second air storage cavity 15; the supporting surface structure 17 is arranged inside the box body 10 and the box cover 11, is arranged between the first air storage cavity 13 and the second air storage cavity 15, and is used for partitioning a plurality of first channels 16 to form an intermittent structure, and the box cover 11 is detachably connected to one surface of the box body 10 through a fixing screw 18;

as shown in fig. 5, the air outlet 14 is disposed at a side far from the first channel 16, as shown in fig. 6, the air outlet 14 includes a first guide groove 19 and a second guide groove 20, and the first guide groove 19 and the second guide groove 20 are disposed in parallel with each other;

as shown in fig. 6, at least two first exhaust holes 21 are uniformly distributed in the first guiding gutter 19, the first exhaust holes 21 are communicated with each other, and the distances between the first exhaust holes 21 are equal;

as shown in fig. 6, at least two second exhaust holes 22 are uniformly distributed in the second guiding gutter 20, the second exhaust holes 22 are communicated with each other, the distances between the second exhaust holes 22 are equal, and the diameter of the first exhaust hole 21 is smaller than that of the second exhaust hole 22; in embodiment 1, the area of the first exhaust hole 21 is 30% to 80% of the area of the second exhaust hole 22.

Among the above-mentioned technical scheme, design first exhaust hole 21 and second exhaust hole 22 for different diameters, can play different effects to the exhibition of printing paper 5, second exhaust hole 22, the macropore combustion gas is more promptly, and strength is great, mainly used resists the ascending warpage of printing paper 5, first exhaust hole 21, the micropore combustion gas is few promptly, outwards spray with the state of similar cone, the air current performance after apart from first exhaust hole 21 certain limit is stable, be used for pacifying printing paper 5. And, first guiding gutter 19 and second guiding gutter 20 all design for long and narrow gap, can effectively restrain the air current that sprays forward and backward, and is higher to the utilization efficiency of air current, and it is better to open up flat effect to can be similar sectorial air current that sprays with the air current plastic of the cone that first exhaust hole 21 and second exhaust hole 22 spray, a plurality of sectorial air current that sprays can form an air curtain, and two air curtains are formed to two guiding gutters. In addition, a person skilled in the art may select, according to an actual exhaust situation, specific numbers of the first exhaust holes 21 and the second exhaust holes 22 and the first exhaust holes 21 and the second exhaust holes 22 with corresponding sizes, a distance between two adjacent first exhaust holes 21, and a distance between two adjacent second exhaust holes 22, which is not specifically limited in this embodiment 1.

In another specific implementation manner of this embodiment 1, both the first exhaust hole 21 and the second exhaust hole 22 may be set as small holes, but with this design, the distance between the air outlet 14 of the wind box 1 and the printing paper 5 needs to be shortened, otherwise, due to the divergent effect of air, the pressure of the air flow on the printing paper 5 is insufficient, the printing paper 5 cannot be flattened, and the flattening effect is poor.

In another specific implementation manner of this embodiment 1, both the first exhaust hole 21 and the second exhaust hole 22 may be set to be large holes, but with this design, when the tail of the printing paper 5 is located between the first exhaust hole 21 and the second exhaust hole 22, a large amount of air flow enters the tail, which causes the tail to float and cannot flatten the printing paper 5, and the flattening effect is poor.

In another specific implementation manner of this embodiment 1, only one row of exhaust holes, for example, the first exhaust hole 21, may be designed as a large hole or a small hole, and with this design, the exhaust airflow can only form one air curtain to act on one line of the printing paper 5, and the acting area of the pressure is small, and is easily affected by the characteristics of the printing paper 5, including the paper head, the paper tail, the paper length, and the like, and the flattening effect is unstable.

Further, as shown in fig. 3, in a specific embodiment of this embodiment 1, the number of the air inlets 12 is 4, the 4 air inlets 12 are uniformly distributed in the area of the first air storage cavity 13, and the distance between every two adjacent air inlets 12 is equal, the specific distance may be correspondingly changed according to the length of the first air storage cavity 13 or the length of the wind box 1 in actual use, and the number of the air inlets 12 may also be correspondingly changed according to the length of the first air storage cavity 13 or the length of the wind box 1, so as to achieve a better flattening effect on the printing paper 5.

Further, in the present embodiment 1, the diameters of the 4 air inlets 12 are all set to be 12mm, but those skilled in the art can also change the diameter size of the air inlets 12 in practical use, and the diameter size of the air inlets 12 disclosed in the embodiment 1 of the present invention is only the optimal diameter size.

Further, in the present embodiment 1, the wind box 1 is designed in a rectangular multi-chamber structure. The common manufacturing method of the cavity structure is casting, but the surface of the cavity structure obtained by casting is rough, which is not beneficial to the passing of high-speed circulating gas. Therefore, in the technical scheme of this embodiment 1, one surface of the cavity structure is designed to be an assembly structure, that is, the inner surface of the cavity structure is changed to be the outer surface of the part of the box body 10, so that the processing problem inside the cavity structure is solved. The case 10 of this embodiment 1 is machined by a milling machine, and all machining positions are open faces, so that there is no machining difficulty. In addition, in order to enable the wind box 1 to be used in a narrow space environment, so that the box cover 11 cannot be too thick, the box cover 11 of the embodiment 1 is designed to be a thin sheet metal structure. However, because the gas pressure inside the wind box 1 is relatively high, if one surface of the cavity structure is designed to be a thin sheet metal structure, the connection between the box body 10 and the box cover 11 has extremely high requirements on the manufacturing process. Therefore, in the embodiment 1, the first gas storage cavity 13 and the second gas storage cavity 15 are designed to be of an intermittent structure, that is, one part of the first gas storage cavity is communicated through the first passage 16, and the other part of the first gas storage cavity is separated through the supporting surface structure 17, by adopting the structure, the area of the box cover 11 bearing the gas pressure is greatly reduced, and the pressure borne by the box cover 11 is further transmitted to the box body 10 through the plurality of fixing screws 18, so that the box cover 11 is ensured not to generate large deformation caused by overlarge pressure. Further, the contact surface of the box body 10 and the box cover 11 adopts a glue brushing mode to ensure the sealing of the wind box 1. By adopting the structure of the wind box 1 in this embodiment 1, when the cavity bears the gas pressure of 0.6MPa, the deformation of the box cover 11 is still ensured, and the wind box 1 is airtight, and meanwhile, the structure of the wind box 1 in this embodiment 1 is simpler and has better performance.

Example 2

In correspondence with the aforementioned embodiment 1 of a wind box applied to a printing paper flattening apparatus, the present invention also provides an embodiment 2 of a flattening apparatus. As shown in fig. 7, the flattening apparatus includes: the air supply device comprises an air box 1, air source equipment 2, a main air inlet pipe 3 and a roller 4, wherein one end of the main air inlet pipe 3 is respectively connected with at least two air inlets 12 of the air box 1 through quick-insertion variable-diameter equipment (not shown in figure 7), and the other end of the main air inlet pipe 3 is connected with the air source equipment 2; the wind box 1 is arranged on the outer side of the roller 4 and is parallel to the camera shooting line 7.

Further, in the embodiment 2, the wind box 1 is installed at one side of the printing paper 5, the distance between the wind box and the printing paper 5 is 6mm-15mm, and the printing paper 5 is attached to the roller 4; in addition, the point where the camera shooting line 7 coincides with the roller 4 in fig. 7 is a paper detection point 6; specifically, in the present embodiment 2, as shown in fig. 7, the distance between the air outlet 14 of the wind box 1 and the printing paper 5 is 10 mm.

Further, in the present embodiment 2, the cross section of the box body 10 of the wind box 1 is a rectangle with a width of 20mm and a height of 80 mm.

In addition, it should be particularly noted that in this embodiment 2, the quick-insertion diameter-changing device (not shown in fig. 7) may adopt a quick-insertion diameter-changing four-way, that is, the main air inlet pipe 3 is changed into 3 12mm slave air inlet pipes, the slave air inlet pipes are branch air pipes of the main air inlet pipe 3, and the 3 12mm slave air inlet pipes are respectively connected with the 3 air inlets 12; the five-way that changes is inserted soon can also be adopted, changes main intake pipe 3 into 4 12mm from the intake pipe promptly, and 4 12mm from the intake pipe respectively with 4 air inlets 12 be connected.

Further, in a specific implementation manner of this embodiment 2, the distance between the camera shooting line 7 and the wind box 1 is set to be 2mm-10 mm; specifically, in the present embodiment 2, as shown in fig. 7, the distance between the camera shooting line 7 and the wind box 1 is set to 5 mm.

Further, in a specific embodiment of this embodiment 2, the air source device 2 employs an air compressor capable of providing compressed air, and the distance between the air source device 2 and the use end, that is, the wind box 1, may be relatively long, and the distance does not affect the normal use of the air source device 2.

Further, in a specific embodiment of this embodiment 2, the main air inlet pipe 3 comprises a hard pipe and a flexible pipe (not shown in fig. 7), and the hard pipe is used in a flattening device in which the straight distance between the air source equipment 2 and the wind box 1 is greater than 10 m; the hose is used in a flattening device with the linear distance between the air source equipment 2 and the wind box 1 not more than 10 m; specifically, in this embodiment 2, when the main air inlet pipe 3 is arranged by using a hard pipe, the hard pipe needs to use an air pipe with a diameter greater than 20 mm; when the main air inlet pipe 3 adopts a hose for pipe distribution, the hose needs to use an air pipe with the diameter of about 16 mm.

It should be particularly noted that, in this embodiment 2, each parameter is an optimal range or an optimal numerical value for implementing the technical solution of the present invention, and a person skilled in the art may still make corresponding adjustments according to specific actual situations during the actual use process, but the technical solution obtained by making simple parameter modification adjustments according to the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

In embodiment 1 and embodiment 2 of the present invention, the operating principle of the wind box 1 is as follows:

as shown in fig. 4, at first, let in gas, compressed air promptly, gas through air inlet 12, when compressed air reachs first gas storage chamber 13 of being connected with air inlet 12 after passing through air inlet 12 promptly, first gas storage chamber 13 prestores partly gas promptly, and compressed air is as the transfer, and first gas storage chamber 13 is filled rapidly after gas flows into first gas storage chamber 13, guarantees the even of the inside gas pressure of first gas storage chamber 13, and the process specifically is: when gas, namely compressed air reaches the first gas storage cavity 13, the movement of the gas is limited by a cavity arm of the first gas storage cavity 13, turbulence is formed inside the first gas storage cavity 13, the gas inside the whole first gas storage cavity 13 is stirred, and at the moment, high-pressure high-speed gas rapidly flows to a low-pressure low-speed area, so that the gas pressure in the first gas storage cavity 13 is basically consistent;

secondly, after the gas is uniformly pressurized in the first gas storage cavity 13, the gas enters the second gas storage cavity 15 through a first passage 16 connecting the first gas storage cavity 13 and the second gas storage cavity 15, and secondary uniform pressure is performed in the second gas storage cavity 15;

finally, the gas after the two times of uniform pressure, i.e., the compressed air, is discharged out of the wind box 1 through the air outlet 14, at this time, the air flow of the air outlet 14 is stable, i.e., the air flow pressure near the plurality of first exhaust holes 21 and the plurality of second exhaust holes 22 of the air outlet 14 is substantially the same. As shown in fig. 7, the air of the discharge wind box 1 is uniformly blown to the surface of the printing paper 5, so that the printing paper 5 is uniformly pressed against the roller 4 disposed below the printing paper 5, the flattening of the printing paper 5 is completed, and the stability of the flattening effect can be ensured.

It should be noted that, in fig. 7, the marks of the air inlet 12 and the air outlet 14 are used for convenience of description of the scheme, but they do not correspond to the specific structures and numbers of the air inlet 12 and the air outlet 14 on the wind box 1, and the specific structures and numbers of the air inlet 12 and the air outlet 14 can be obtained by referring to other figures, therefore, the marks in fig. 7 do not make the technical scheme of the present invention unclear. Next, the air supply device 2 and the main air inlet pipe 3 in fig. 7 are only simple schematic diagrams for explaining the overall structure of the present invention, and do not represent the position and size in practical use, and do not make the present invention unclear. In addition, it should be noted that, because the whole wind box 1 has a long structure, two air inlets 12 and other corresponding structural parts are omitted in the middle of fig. 5 and 6 to show the complete drawings, but the implementation of the technical solution of the present invention is not affected.

Claims (11)

1. A wind box applied to a printing paper flattening device is characterized in that the wind box is designed into a rectangular multi-cavity structure and comprises: a case body and a case cover connected to each other;

at least two air inlets are formed in one side, away from the box cover, of the box body, the at least two air inlets are arranged on the same central axis and are connected with a first air storage cavity, and the first air storage cavity is arranged inside the box body;

the box body is provided with an air outlet, the air outlet is arranged at one end far away from at least two air inlets, the air outlet is connected with a second air storage cavity, and the second air storage cavity is arranged inside the box body;

the first air storage cavity is connected with the second air storage cavity through a first channel arranged inside the box body;

the air outlet is arranged on one side far away from the first channel and comprises a first diversion trench and a second diversion trench, and the first diversion trench and the second diversion trench are arranged in parallel;

at least two first exhaust holes are formed in the first diversion trench, and the first exhaust holes are communicated with one another;

at least two second exhaust holes are formed in the second diversion trench, the second exhaust holes are communicated with one another, and the diameter of the first exhaust hole is smaller than that of the second exhaust hole.

2. A bellows for use in a printing sheet flattening device according to claim 1,

a supporting surface structure formed by bonding the first gas storage cavity and the second gas storage cavity by adopting an adhesive is further arranged between the first gas storage cavity and the second gas storage cavity;

the supporting surface structure is arranged in the box body and the box cover and between the first air storage cavity and the second air storage cavity and used for separating the first channels to form an intermittent structure.

3. The wind box for a printing paper flattening device according to claim 1, characterized in that at least two of the air inlets are uniformly distributed in the area of the first air reservoir, and the distance between each air inlet is equal.

4. The wind box applied to a printing paper flattening device according to claim 1, wherein at least two first air discharge holes are uniformly distributed inside the first guiding gutter, and the distance between the first air discharge holes is equal.

5. The wind box applied to a printing paper flattening device according to any one of claims 1 to 4, wherein at least two second air discharge holes are uniformly distributed inside the second guiding gutter, and the distance between the second air discharge holes is equal.

6. A flattening apparatus using a wind box according to any one of claims 1 to 5 applied to a printing paper flattening apparatus, the flattening apparatus comprising: the air box comprises an air box body, air source equipment and a main air inlet pipe, wherein one end of the main air inlet pipe is connected with at least two air inlets of the air box body respectively through quick-insertion variable-diameter equipment, and the other end of the main air inlet pipe is connected with the air source equipment.

7. The flattening device of claim 6, further comprising a roller, wherein the wind box is arranged outside the roller and parallel to the camera shooting line.

8. A flattening device according to claim 6 or 7, characterized in that the wind box is arranged on one side of the printing paper, the distance between the wind box and the printing paper is 6mm-15mm, and the printing paper is attached to the roller.

9. The flattening apparatus according to claim 7, wherein a distance between the camera shooting line and the wind box is set to be 2mm to 10 mm.

10. The flattening apparatus according to claim 6, wherein the air supply device employs an air compressor capable of providing compressed air.

11. The flattening apparatus of claim 6, wherein the main inlet duct includes a hard tube and a flexible tube,

the hard pipe is used in a flattening device with the linear distance between the air source equipment and the wind box being more than 10 m;

the hose is used in a flattening device, wherein the straight line distance between the air source equipment and the wind box is not more than 10 m.

Images