CN110920227B

CN110920227B - Offset press with humidity control function

Info

Publication number: CN110920227B
Application number: CN201911180732.2A
Authority: CN
Inventors: 章圣放
Original assignee: Wenzhou Jinjia Color Printing Co ltd
Current assignee: Wenzhou Jinjia Color Printing Co ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2021-05-14
Anticipated expiration: 2039-11-27
Also published as: CN110920227A

Abstract

The invention discloses an offset press with humidity adjusting function, which comprises a frame, a paper conveying device, a humidity adjusting device and a printing device, wherein the paper conveying device comprises a conveying frame and a conveying belt, the conveying belt is densely provided with air holes, the conveying frame sequentially comprises a humidifying inclined plane and a dehumidifying plane humidity control inclined plane, the humidity adjusting device comprises a humidity control shell and a sensing device, a humidifier, a dehumidifier and a humidity controller are arranged in the humidity control shell, the humidifier is arranged above the relative position of the humidifying inclined plane, the dehumidifier is arranged at the relative position of the dehumidifying plane, the humidity controller is arranged below the relative position of the humidity control inclined plane, a centralized processor is coupled between the sensing device and the humidity controller as well as between the dehumidifier and the humidifier, the humidity control shell and the conveying frame surround to form a conveying channel for conveying paper, and the offset press has the function of automatically detecting the relative humidity of the environmental temperature, and can automatically humidify or dehumidify the paper.

Description

Offset press with humidity control function

Technical Field

The present invention relates to an offset printing machine, and more particularly, to an offset printing machine having a humidity adjusting function.

Background

An offset printing press is a kind of offset printing press, in which printing images are first printed on a blanket cylinder from a printing plate and then transferred to paper by the blanket cylinder. Offset presses can be divided into sheet-fed offset presses and web-fed offset presses according to different paper feeding modes; the printing color number completed by one-time paper feeding can be divided into single-color, double-color, four-color and multi-color printing machines; the printing method can be divided into a small offset press, a six-opening, four-opening, two-opening and full-sheet printing press according to the maximum paper breadth to be printed, and a double-sided offset press which can simultaneously complete two-side printing by one-time paper feeding is also arranged.

In the printing production process, the temperature, humidity and ink property of a workshop all cause certain influence on the printing quality of paper, if the temperature is too high and the relative humidity is too low, the paper is easy to become brittle, static electricity is easy to generate in printing, the static electricity can cause overprint inaccuracy, on the other hand, the static electricity can also cause printing equipment failure, and even a circuit fire disaster can be caused by discharging; if the temperature is too low and the relative humidity is too high, the ink is not easy to dry when printed on paper, the plate pasting phenomenon is easy to generate, the paper can change along with the change of moisture, the quantification, the tensile strength, the flexibility, the folding resistance and the like of the paper can be changed, the size of the paper can also stretch, and even the paper can curl, stick up edges, wrinkle, lotus leaf edges and the like, the phenomenon that the paper wrinkles is generated not only easily enables the printer not to normally operate, but also delays the construction period, and simultaneously, the printing quality is easy to influence, and even waste products are caused.

Disclosure of Invention

In view of the disadvantages of the prior art, an object of the present invention is to provide an offset printing press with a humidity adjustment function, which has a function of automatically detecting the relative humidity of the ambient temperature and can automatically humidify or dehumidify paper.

In order to achieve the purpose, the invention provides the following technical scheme: an offset press with humidity control function comprises a rack, and a paper conveying device, a humidity control device and a printing device which are arranged on the rack, wherein the paper conveying device conveys paper into the humidity control device for humidification or dehumidification and then conveys the paper into the printing device for printing, the paper conveying device comprises a conveying frame which is in a trapezoidal structure and a conveying belt which is used for conveying the paper along the conveying frame, air holes are densely formed in the conveying belt, and the conveying frame sequentially comprises a humidification inclined plane which is far away from the printing device and is in a bevel edge structure, a dehumidification plane which is in a plane structure, and a humidity control inclined plane which is close to the printing device and is in a bevel edge structure;

humidity control device is including around the accuse wet shell in the carriage outside and be used for detecting the induction system of relative humidity in the workshop, be provided with in the accuse wet shell and be used for carrying out the humidifier of fountain solution humidification operation to one side of paper on the humidification inclined plane and be used for going up the dehumidifier that the paper dehumidified the operation on the dehumidification plane and be used for carrying out humidification or the accuse wet ware of dehumidification operation to another side of paper on the accuse wet inclined plane, the humidifier sets up in the top of humidification inclined plane relative position, the dehumidifier sets up in dehumidification plane relative position department, the accuse wet ware sets up in the below of accuse wet inclined plane relative position, the central processing unit is coupled between induction system and accuse wet ware and dehumidifier and humidifier, the accuse wet shell surrounds with the carriage and forms the transfer passage who supplies the paper to carry, the conveyer belt is sent the paper from the exit end of transfer passage from the exit end of humidification inclined plane through dehumidification plane again with the entrance point entering of humidification inclined plane transfer passage And (6) discharging.

The invention is further configured to: the conveying belt comprises a first conveying belt positioned on the humidifying inclined plane, a second conveying belt positioned on the dehumidifying plane, a third conveying belt positioned on the humidity control inclined plane, a rotating roller for driving the first conveying belt, the second conveying belt and the third conveying belt to rotate and a rotating motor for driving the rotating roller to rotate, and the paper conveying device firstly conveys the paper to the first conveying belt, then conveys the paper to the second conveying belt through the first conveying belt, then conveys the paper to the third conveying belt through the second conveying belt and finally conveys the paper out of the outlet end of the conveying channel through the third conveying belt in the paper conveying process.

The invention is further configured to: the dehumidifier comprises a heat drier arranged on the upper side and the lower side of the dehumidification plane and used for carrying out heat drying on the two sides of the paper and/or an air drier arranged on the upper side of the dehumidification plane and used for carrying out air drying on the front side of the paper.

The invention is further configured to: the wet control device comprises a wet control shell, a control induction switch and a dehumidification plane, wherein the wet control shell is arranged on the wet control shell, the control induction switch is arranged between the alcohol sprayer and the dehumidification plane, and the control induction switch is used for controlling the on-off of the control induction switch.

The invention is further configured to: the wet ware of accuse is including setting up the first air intake in humidification inclined plane below, and set up the second air intake in dehumidification plane below, and set up first air outlet and the second air outlet in the wet inclined plane of accuse below, be provided with in the first air outlet and be used for carrying out the heating air-blast device of dehumidification operation to the last paper of the wet inclined plane of accuse, be provided with in the second air outlet and be used for carrying out the air-blast device that sprays of humidification operation to the last paper of the wet inclined plane of accuse, heating air-blast device or spray air-blast device operation in-process can form the adsorption to the paper on humidification inclined plane and the dehumidification plane.

The invention is further configured to: the humidifying shell is internally provided with a humidifying inductive switch for controlling the opening and closing of the humidifier, a dehumidifying inductive switch for controlling the opening and closing of the dehumidifier and a humidity controlling inductive switch for controlling the opening and closing of the humidity controller, the humidifying inductive switch is arranged between the humidifier and the inlet end of the conveying passage, the dehumidifying inductive switch is arranged between the dehumidifier and the humidifying inclined plane, the humidity controlling inductive switch is arranged between the humidity controller and the dehumidifying plane, the spraying and blowing device and the humidifier are started together when the humidifying inductive switch triggers the humidity controlling inductive switch firstly and then the heating and blowing device and the dehumidifier are started together when the humidity controlling inductive switch triggers firstly and then the humidity controlling inductive switch.

The invention is further configured to: the sensing device comprises a hygrometer and a thermometer which are arranged on the outer side wall of the humidity control shell and used for displaying the temperature and the humidity detected by the sensing device.

In conclusion, the invention has the following beneficial effects: the humidity adjusting device is matched with the conveying frame for use, can humidify and dehumidify paper in the conveying frame area, aims at the paper to be printed, and does not perform humidity adjusting operation on the paper which is not printed or does not need to be printed, so that endless waste is reduced, energy is saved, the expenditure of a company is saved, and the humidity adjustment and control in a small range are more accurate compared with the humidity adjustment and control in a large range; compared with plane humidification, the inclined plane humidification has more advantages, not only is the coverage area wide, but also the space is saved, and the paper can be completely covered under one-time spraying only by selecting a proper angle; the plane dehumidification can avoid the accident situation and has stable dehumidification effect; this design benefit on wet inclined plane of accuse need not pass through paper reversal device, exchanges the positive and negative, just can carry out the humidification or dehumidify to the another side, and this design reduces work flow, practices thrift the work ageing to play the effect of accelerating the printing.

Drawings

FIG. 1 is a schematic plan view of an offset printing press;

FIG. 2 is a plan sectional view of the humidity conditioning device;

fig. 3 is a schematic plan view of the carriage.

Reference numerals: 1. a paper conveying device; 11. a carriage; 111. humidifying the inclined plane; 112. removing moisture from the plane; 113. a moisture control inclined plane; 12. a conveyor belt; 121. a first conveyor belt; 122. a second conveyor belt; 123. a third conveyor belt; 124. a rotating roller; 2. a humidity adjusting device; 21. a humidity control shell; 211. a humidifier; 2111. a humidifying induction switch; 212. a dehumidifier; 2121. a dehumidification induction switch; 213. a humidity controller; 2131. a first air inlet; 2132. a second air inlet; 2133. a first air outlet; 2134. a second air outlet; 2135. a heating blower device; 2136. a spray blower device; 2137. a humidity control inductive switch; 22. an induction device; 23. a delivery channel; 24. an alcohol sprayer; 241. controlling the inductive switch; 242. opening and closing a switch; 3. a printing device.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1 to 3, in order to achieve the above object, the present invention provides the following technical solutions: an offset press with humidity control function comprises a frame, a paper conveying device 1 arranged on the frame, a humidity control device 2 and a printing device 3, wherein the paper conveying device 1 conveys paper into the humidity control device 2 for humidification or dehumidification and then conveys the paper into the printing device 3 for printing, the humidity control device 2 is used in cooperation with the carriage 11, and is capable of humidifying or dehumidifying the sheets located in the area of the carriage 11, the area where the humidity is changed is small compared to controlling the relative humidity of the whole plant, and the target is the sheet to be printed, the humidity adjustment operation is not performed on the paper which is not printed or not printed, thereby reducing the waste without end, saving the energy and the expenses of the company, the humidity regulation in a small range is more accurate than that in a large range, and the condition of humidity difference between the edge area and the central area cannot occur; the paper conveying device 1 comprises a conveying frame 11 which is arranged in a trapezoidal structure and a conveying belt 12 which is used for conveying paper along the conveying frame 11, wherein air holes are densely formed in the conveying belt 12, and the arrangement of the air holes can facilitate the subsequent moisture control device 213 to carry out dehumidification or humidification operation on the back of the paper;

the conveying frame 11 comprises a humidifying inclined plane 111 which is far away from the printing device 3 and is arranged in a bevel edge structure, a dehumidifying plane 112 which is arranged in a plane structure, and a humidity control inclined plane 113 which is close to the printing device 3 and is arranged in a bevel edge structure, the humidity adjusting device 2 comprises a humidity control shell 21 which surrounds the outer side of the conveying frame 11, and a sensing device 22 which is used for detecting the relative humidity in a workshop, a humidifier 211 which is used for humidifying the dampening solution on one side surface of the paper on the humidifying inclined plane 111, a dehumidifier 212 which is used for dehumidifying the paper on the dehumidifying plane 112, and a humidity controller 213 which is used for humidifying or dehumidifying the other side surface of the paper on the humidity control inclined plane 113 are arranged in the humidity control shell 21, the humidifier 211 is arranged above the relative position of the humidifying inclined plane 111, the dehumidifier 212 is arranged at the relative position of the dehumidifying plane 112, the humidity controller 213 is arranged below the relative position of the humidity control inclined plane 113, the design of the conveying frame 11 is divided into three different humidifying or dehumidifying areas so as to achieve better humidifying or dehumidifying effect, the design of the humidifying inclined plane 111 sprays foggy fountain solution through the humidifier 211 when humidifying the paper on the humidifying inclined plane 111, the fountain solution can be sprayed downwards and forwards under the action of gravity and assistance force during spraying so as to humidify the paper on the humidifying inclined plane 111, compared with plane humidifying, the inclined plane humidifying range is wide during one-time spraying, the spraying space required by the inclined plane humidifying is smaller than that of the plane humidifying when humidifying the surface of the paper with the same area, when humidifying the surface of the paper with a larger area, the plane humidifying needs high enough height to cover the sprayed fountain solution on the whole paper, the equipment height is easy to increase without end, and the conveying frame is installed in the early period, In addition, the problem of inconvenience in installation and maintenance is caused in the later maintenance process, in the spraying process, the atomized fountain solution can not directly pass through a far distance of the power-assisted spraying of the sprayer like liquid spraying (the sprayer can only play an auxiliary role but can not play a decisive role), so that the paper is difficult to completely cover at one time in the plane spraying process, a plurality of spraying openings can only be arranged along the length direction of the paper, but spraying overlapping areas are easy to occur in the spraying process of the plurality of spraying openings, so that the humidity value in the overlapping areas is larger than that in the non-overlapping areas, the humidity on the paper is uneven, the humidity of the overlapping areas is too high in the later printing process, the ink can not be dried quickly, the regional plate pasting is caused, the inclined plane humidification benefit is realized compared with the plane humidification, and the covering area is wide, the space is saved, and the paper can be completely covered under one-time spraying only by selecting a proper angle; the design of the dehumidification plane 112 is mainly drying, and the dehumidification effect is fastest and most effective by blowing hot air, however, if the front surface of the paper is dried in the inclined plane, a downward acting force is easily applied to the paper, and in the inclined plane for upward transportation, the situations of increasing the conveying pressure, slowing down the conveying speed, and the like are caused, which results in unnecessary waste of resources, seriously causes the deviation of the paper, and even causes the situation of blowing off the paper, and hinders the printing process; in the inclined plane of downward transportation, can lead to the paper to remove too fast, lead to and change with the front and back paper distance, can lead to the printing error at intermittent type printing process, the condition such as printing is omitted, so the plane is dehumidified and can be avoided these circumstances, stable dehumidification effect has, the design of accuse wet inclined plane 113 can carry out the back treatment through accuse wet ware 213 to the paper that will follow accuse wet inclined plane 113 and carry out downwards, this design benefit of accuse wet inclined plane 113 need not pass through paper reversing device, exchange the positive and negative, just can carry out humidification or dehumidification to the another side, this design reduces workflow, practice thrift the working age, thereby play the effect of accelerating the printing.

A centralized processor is coupled between the sensing device 22 and the humidity controller 213 and between the dehumidifier 212 and the humidifier 211, and the centralized processor is arranged to set a humidity value most suitable for the current paper in the centralized processor, and compare the humidity value with a relative humidity value sensed by the sensing device 22, so as to control the opening and closing of the dehumidifier 212 or the humidifier 211 or the humidity controller 213, thereby being more automatic, saving labor cost and reducing product cost, the humidity control shell 21 and the conveying frame 11 surround to form a conveying channel 23 for paper conveying, and the conveying belt 12 conveys the paper from the inlet end of the conveying channel 23 at the humidifying inclined plane 111, passes through the dehumidifying plane 112 and finally is sent out from the outlet end of the conveying channel 23.

The conveying belt 12 comprises a first conveying belt 121 positioned on the humidifying inclined plane 111, a second conveying belt 122 positioned on the dehumidifying plane 112, a third conveying belt 123 positioned on the humidity control inclined plane 113, a rotating roller 124 for driving the first conveying belt 121, the second conveying belt 122 and the third conveying belt 123 to rotate and a rotating motor for driving the rotating roller 124 to rotate, the paper conveying device 1 is firstly conveyed onto the first conveying belt 121, then conveyed onto the second conveying belt 122 through the first conveying belt 121, then conveyed onto the third conveying belt 123 through the second conveying belt 122 and then conveyed out from the outlet end of the conveying channel 23 through the third conveying belt in the paper conveying process, the conveying belt 12 is designed to facilitate the paper conveying device 1 to convey paper onto the conveying frame 11, and the sectional design can be used for carrying out independent maintenance on each area in later maintenance, compared with the integrally designed conveying belt 12, more flexibility.

Dehumidifier 212 is including setting up the hot desicator that carries out hot drying to the paper two sides about dehumidification plane 112 and/or setting up the air dryer that openly carries out wind stoving at dehumidification plane 112 upside to the paper, dehumidifier 212 roughly divide into hot stoving and two kinds of operations of wind stoving, the hot advantage of drying for wind, it is stable to dehumidify, the noise is lower, can carry out the dehumidification operation simultaneously to the both sides of paper, can play comparatively stable dehumidification effect through the control temperature, the wind stoving is for the advantage of hot stoving, the dehumidification effect is fast, can direct action reduce unnecessary energy consumption on the paper surface, comparatively the energy saving, reduce product cost.

An alcohol sprayer 24 capable of spraying alcohol on two sides of paper is arranged at the outlet end of the conveying channel 23, which is positioned at the position of the humidity control inclined plane 113, of the humidity control shell 21, a control induction switch 241 for controlling the alcohol sprayer 24 to be automatically opened and closed is arranged in the humidity control shell 21, the control induction switch 241 is arranged between the alcohol sprayer 24 and the dehumidification plane 112, an opening and closing switch 242 for controlling the opening and closing of the control induction switch 241 is arranged on the humidity control shell 21, when the control induction switch 241 senses paper, the alcohol sprayer 24 is driven to be started, so that the alcohol sprayer 24 sprays on the front side and the back side of the paper, when the control induction switch 241 senses that the paper cannot be detected, the alcohol sprayer 24 is closed, in addition, the opening and closing switch 242 can control whether the induction switch 241 is opened or closed, therefore, when the paper does not need alcohol, no-end waste is avoided, and the, thereby let the water film expand at the paper more easily, alcohol can also be through the circulation of fountain solution, takes away the heat on the paper, in addition can be in printing process with alcohol conduction on the paper to between rubber roll and the rubber roll, take away the heat that the friction produced between roller and the roller, reduce as far as there is the deformation that the heat arouses in the machine operation process, guarantee the printing precision.

The humidity controller 213 includes a first air inlet 2131 disposed below the humidifying inclined plane 111, a second air inlet 2132 disposed below the dehumidifying plane 112, and a first air outlet 2133 and a second air outlet 2134 disposed below the humidity controlling inclined plane 113, wherein a heating blower 2135 for dehumidifying the paper on the humidity controlling inclined plane 113 is disposed in the first air outlet 2133, a spraying blower 2136 for humidifying the paper on the humidity controlling inclined plane 113 is disposed in the second air outlet 2134, and the heating blower 2135 or the spraying blower 2136 can form an adsorption effect on the humidifying inclined plane 111 and the paper on the dehumidifying plane 112 during operation. This design of wet ware 213, can dehumidify or the humidification operation to the paper back, can play effectual adsorption to the paper on humidification inclined plane 111 and the dehumidification plane 112 when this wet ware 213 starts, prevent that the paper on humidification inclined plane 111 from gliding, the skew phenomenon from appearing, prevent that the paper on the dehumidification plane 112 from appearing the skew phenomenon in the wind stoving operation in-process, the paper interval differs around avoiding causing, influence subsequent printing operation, in addition can carry out the blast air operation to the paper on the wet inclined plane 113 of accuse: 1. the drying operation of the back of the paper can be accelerated in the hot air drying process, and even if the heating and blowing device 2135 blows the paper off the conveyor belt, the paper can also move obliquely downwards under the action of the gravity of the paper, so that the situation that the paper is not standing long before is avoided; 2. in the humidification process, the humidity of the back of the paper and the humidity of the conveying belt are increased, so that the paper is attached to the conveying belt, and is difficult to collect in the subsequent paper collection process, the air blowing device is attached to the humidification process, the phenomenon that the paper is attached to the conveying belt is effectively weakened, and the printing process and the paper collection process are guaranteed to be carried out smoothly.

A humidification induction switch 2111 for controlling the on-off of the humidifier 211, a dehumidification induction switch 2121 for controlling the on-off of the dehumidifier 212 and a humidity control induction switch 2137 for controlling the on-off of the humidity controller 213 are arranged in the humidity control shell 21, and the humidification induction switch 2111, the dehumidification induction switch 2121 and the humidity control induction switch 2137 are designed to intermittently dehumidify and humidify the paper on the conveying frame 11 and stop working when no paper passes through, so that the most effective saving effect is ensured; the humidifying induction switch 2111 is arranged between the humidifier 211 and the inlet end of the conveying channel 23, the dehumidifying induction switch 2121 is arranged between the dehumidifier 212 and the humidifying inclined plane 111, the humidity control induction switch 2137 is arranged between the humidity control switch 213 and the dehumidifying plane 112, the spraying blower 2136 and the humidifier 211 are started together when the humidifying induction switch 2111 triggers the humidity control induction switch 2137 firstly, the heating blower 2135 and the dehumidifier 212 are started together when the humidity control induction switch 2121 triggers the humidity control induction switch 2137 firstly, the humidifier 211 and the dehumidifier 212 are connected in parallel, the humidifier 211 and the spraying blower 2136 are connected in series, the dehumidifier 212 and the heating blower 2135 are connected in series, the possibility that the spraying blower 2136 is started based on the starting of the humidifier 211 or the possibility that the heating blower 2135 is started based on the starting of the dehumidifier 212 can be formed, thereby ensuring that the double-sided humidifying and the double-sided dehumidifying of the humidity adjusting device 2 are integrated, the condition of dehumidification, humidification and mixing operation can not occur.

Sensing device 22 is including setting up hygrometer and the thermometer that is used for showing the temperature and humidity that sensing device 22 detected on wet shell 21 lateral wall of accuse, the design of this hygrometer and thermometer can the audio-visual condition of seeing out temperature and humidity in the workshop of person of facilitating the use, and because sensing device 22 exposes externally (sensing device 22 exposes the humidity that sets up in the seizure workshop that can be more accurate, thereby ensure the accuracy of humidity), probably under long-time use, there is the inaccurate phenomenon of response, the user can be through with wet shell 21 on hygrometer and thermometer and the thermometer contrast of taking certainly, not only detect conveniently and can be used for detecting whether sensitive sensing device 22, thereby guarantee that this offset press can normally last the function.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The offset press with the humidity adjusting function comprises a machine frame, and a paper conveying device (1), a humidity adjusting device (2) and a printing device (3) which are arranged on the machine frame, wherein the paper conveying device (1) conveys paper into the humidity adjusting device (2) for humidification or dehumidification and then conveys the paper into the printing device (3) for printing, and the offset press is characterized in that: the paper conveying device (1) comprises a conveying frame (11) which is arranged in a trapezoidal structure and a conveying belt (12) which is used for conveying paper along the conveying frame (11), air holes are densely formed in the conveying belt (12), and the conveying frame (11) sequentially comprises a humidifying inclined plane (111) which is far away from the printing device (3) and is arranged in a bevel edge structure, a dehumidifying plane (112) which is arranged in a plane structure, and a humidity control inclined plane (113) which is close to the printing device (3) and is arranged in a bevel edge structure;

the humidity adjusting device (2) comprises a humidity control shell (21) surrounding the outer side of a conveying frame (11) and a sensing device (22) used for detecting the relative humidity in a workshop, wherein a humidifier (211) used for carrying out dampening liquid humidifying operation on one side surface of paper on a humidifying inclined plane (111), a dehumidifier (212) used for carrying out dehumidifying operation on the paper on a dehumidifying plane (112) and a humidity controller (213) used for humidifying or dehumidifying operation on the other side surface of the paper on the humidity control inclined plane (113) are arranged in the humidity control shell (21), the humidifier (211) is arranged above the relative position of the humidifying inclined plane (111), the dehumidifier (212) is arranged at the relative position of the dehumidifying plane (112), the humidity controller (213) is arranged below the relative position of the humidity control inclined plane (113), and a centralized processor is coupled between the sensing device (22) and the humidity controller (213) and the dehumidifier (212) and the humidifier (211), the humidity control shell (21) and the conveying frame (11) are encircled to form a conveying channel (23) for conveying paper, and the conveying belt (12) enables the paper to enter from the inlet end of the conveying channel (23) at the humidifying inclined plane (111), pass through the dehumidifying plane (112) and finally be discharged from the outlet end of the conveying channel (23);

the dehumidifier (212) comprises a heat drier arranged on the upper side and the lower side of the dehumidification plane (112) for carrying out heat drying on two sides of paper and/or an air drier arranged on the upper side of the dehumidification plane (112) for carrying out air drying on the front side of the paper;

the wet control device (213) comprises a first air inlet (2131) arranged below the humidifying inclined plane (111), a second air inlet (2132) arranged below the dehumidifying plane (112), a first air outlet (2133) and a second air outlet (2134) arranged below the wet control inclined plane (113), a heating and air blowing device (2135) used for dehumidifying the paper on the wet control inclined plane (113) is arranged in the first air outlet (2133), a spraying and air blowing device (2136) used for humidifying the paper on the wet control inclined plane (113) is arranged in the second air outlet (2134), and the heating and air blowing device (2135) or the spraying and air blowing device (2136) can form an adsorption effect on the paper on the humidifying inclined plane (111) and the dehumidifying plane (112) in the operation process;

a humidification induction switch (2111) for controlling the on-off of the humidifier (211), a dehumidification induction switch (2121) for controlling the on-off of the dehumidifier (212) and a humidity control induction switch (2137) for controlling the on-off of the humidity controller (213) are arranged in the humidity control shell (21), the humidifying induction switch (2111) is arranged between the humidifier (211) and the inlet end of the conveying channel (23), the dehumidification inductive switch (2121) is arranged between the dehumidifier (212) and the humidification inclined plane (111), the humidity control induction switch (2137) is arranged between the humidity controller (213) and the dehumidification plane (112), when the humidification induction switch (2111) triggers the humidity control induction switch (2137) firstly and then triggers the spraying and blowing device (2136) and the humidifier (211) are started together, when the dehumidification induction switch (2121) triggers the humidity control induction switch (2137) firstly and then triggers the heating blower device (2135) and the dehumidifier (212) are started together;

the humidifier (211) is arranged above the humidifying inclined plane (111), the humidifier (211) is used for spraying foggy fountain solution, and the fountain solution can be sprayed downwards and forwards under the action of gravity and assistance force during spraying, so that paper on the humidifying inclined plane (111) is humidified.

2. The offset printing press with humidity adjustment function according to claim 1, wherein: the conveying belt (12) comprises a first conveying belt (121) located on the humidifying inclined plane (111), a second conveying belt (122) located on the dehumidifying plane (112), a third conveying belt (123) located on the humidity control inclined plane (113), a rotating roller (124) used for driving the first conveying belt (121), the second conveying belt (122) and the third conveying belt (123) to rotate and a rotating motor used for driving the rotating roller (124) to rotate, and in the process of conveying paper, the paper conveying device (1) is conveyed to the first conveying belt (121), then conveyed to the second conveying belt (122) through the first conveying belt (121), then conveyed to the third conveying belt (123) through the second conveying belt (122), and then conveyed out from the outlet end of the conveying channel (23) through the third conveying belt (123).

3. The offset printing press with humidity adjustment function according to claim 1, wherein: the wet shell of accuse (21) is located wet inclined plane of accuse (113) department transfer passage's exit end (23) and is provided with alcohol atomizer (24) that can carry out alcohol to paper both sides and spray, be provided with control inductive switch (241) that control alcohol atomizer (24) automatic opening and closing in wet shell of accuse (21), control inductive switch (241) set up between alcohol atomizer (24) and dehumidification plane (112), be provided with on wet shell of accuse (21) and be used for controlling opening and closing switch (242) that control inductive switch (241) opened and close.

4. The offset printing press with humidity adjustment function according to claim 1, wherein: the sensing device (22) comprises a hygrometer and a thermometer which are arranged on the outer side wall of the humidity control shell (21) and used for displaying the temperature and the humidity detected by the sensing device (22).