CN110318293B

CN110318293B - Pre-heater

Info

Publication number: CN110318293B
Application number: CN201810263193.8A
Authority: CN
Inventors: 宋浩仁
Original assignee: Emeishan Jiajie Paper Product Co ltd
Current assignee: Emeishan Jiajie Paper Product Co ltd
Priority date: 2018-03-28
Filing date: 2018-03-28
Publication date: 2021-11-09
Anticipated expiration: 2038-03-28
Also published as: CN110318293A

Abstract

The invention discloses a preheater, which comprises a rack, a preheating cylinder and a paper guide roller, wherein the preheating cylinder and the paper guide roller are arranged on the rack, the preheater also comprises a humidity sensor, a servo motor and a controller, the humidity sensor is arranged at one end of paper fed by the preheating cylinder, the servo motor is arranged on the rack, and the controller is respectively electrically connected with the humidity sensor and the servo motor; the preheating cylinder is cylindrical, a preheating cavity which is in contact with the corrugated paper is arranged in the preheating cylinder, and a steam inlet is formed in the preheating cavity; the paper feeding side and the paper discharging side of the preheating cylinder are respectively provided with a tension control mechanism for controlling the tension of paper, the tension control mechanism comprises a lifting cylinder, an electromagnetic valve and a rotating wheel arranged at the top of the lifting cylinder, the electromagnetic valve is used for realizing the lifting of the lifting cylinder, and the electromagnetic valve is electrically connected with the controller. Compared with the prior art, the laminating area of the paper and the preheating cylinder is adjusted directly by adjusting the rotation direction and the angle of the preheating cylinder without arranging an angle wrapping roller.

Description

Pre-heater

Technical Field

The invention relates to the technical field of corrugated board production, in particular to a preheater.

Background

Corrugated paper is a plate-like object formed by bonding liner paper and corrugated paper formed by processing with corrugating rolls, and is generally classified into single corrugated board and double corrugated board. In the production line of corrugated paper, a preheater is needed to preheat the raw material, certain heat is provided for the raw material paper, the moisture of the raw material paper is regulated, and the moisture content of the paper web is reduced and tends to be more uniform. In south China, because the indoor and outdoor temperatures are low and the relative humidity is low in winter, the moisture of the raw paper coming out of the corrugating machine is diffused relatively quickly, and the moisture content of the raw paper tends to be consistent with that of the ambient air. The moisture content of the base paper is within the range of 10-14%, the base paper is not easy to break, if the moisture content of the base paper is lower than 6%, the tension caused by bending of the base paper is obvious, if the moisture content is higher than 18%, the tension caused by stretching is obvious, and the paper breaking phenomenon is easily caused.

In the prior art, an automatic position wrap angle control device (application number CN201220398354.2) for a corrugated paper preheater discloses an automatic position wrap angle control device for the corrugated paper preheater, which comprises a support, a wrap angle support plate, a wrap angle roller and a motor, wherein the wrap angle roller is connected on the wrap angle support plate, the wrap angle support plate is connected on a drive shaft, the wrap angle roller is parallel to the drive shaft, the drive shaft is connected with the support, the motor is fixedly arranged in the support, an output shaft of the motor is connected with the drive shaft through a transmission mechanism, a position sensor is arranged in the support, the position sensor is positioned at one point in the rotating track of the wrap angle support plate, the position sensor is connected with a controller through a signal line, the controller is connected with a driver of the motor through a control line, and an encoder is arranged on the output shaft of the motor, the encoder is connected with the controller through a signal wire. The angle of the angle wrapping roller is adjusted through the speed of the production line, but the influence of air humidity on paper is ignored, and the tension of the paper is not taken into consideration, so that the paper breaking condition is caused in the production process.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a preheater.

The purpose of the invention is realized by the following technical scheme: a preheater comprises a rack, a preheating cylinder and a paper guide roller, wherein the preheating cylinder and the paper guide roller are arranged on the rack, the preheater also comprises a humidity sensor, a servo motor and a controller, the humidity sensor is arranged at one end of paper feeding of the preheating cylinder, the servo motor is arranged on the rack, and the controller is respectively electrically connected with the humidity sensor and the servo motor; the preheating cylinder is cylindrical, a preheating cavity which is in contact with the corrugated paper is arranged in the preheating cylinder, the radian of a sector of the preheating cavity is 120 degrees, and a steam inlet is formed in the preheating cavity; the paper feeding side and the paper discharging side of the preheating cylinder are respectively provided with a tension control mechanism for controlling the tension of paper, the tension control mechanism comprises a lifting cylinder, an electromagnetic valve and a rotating wheel arranged at the top of the lifting cylinder, the electromagnetic valve is used for achieving lifting of the lifting cylinder, and the electromagnetic valve is electrically connected with the controller.

Preferably, the paper guide rollers are respectively arranged on the paper feeding side and the paper discharging side of the preheating cylinder.

Preferably, at least two paper guide rollers are arranged.

Preferably, the runner includes a runner body and a support frame supporting the runner body.

Preferably, the controller is a programmed controller.

The invention has the beneficial effects that:

1. compared with the prior art, the joint area of the paper and the preheating cylinder is adjusted directly by adjusting the rotation direction and the angle of the preheating cylinder without arranging an angle wrapping roller;

2. the device is adopted to adjust the joint area of the paper and the preheating cylinder, so that the water control of the paper is realized, and compared with the prior art, the water control is more accurate and faster;

3. the preheating cavity is adopted for heating, so that the laminating area is effectively utilized, and the energy-saving effect is achieved;

4. the paper tension is adjusted by detecting the air humidity, and the rejection rate of the paper is reduced.

Drawings

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

FIG. 2 is a schematic view of the preheating cylinder according to the present invention;

in the figure, 1-frame, 2-preheating cylinder, 21-preheating cavity, 210-steam inlet, 211-groove, 212-steam outlet, 22-gas-liquid separator, 221-gas outlet, 222-liquid outlet, 223-water return pipe, 3-paper guide roller, 6-tension control mechanism, 7-servo motor, 8-controller, 9-lifting cylinder, 10-electromagnetic valve, 11-rotating wheel, 110-rotating wheel body and 111-support frame.

Detailed Description

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.

Examples

As shown in fig. 1 and 2, a preheater comprises a frame 1, a preheating cylinder 2, a paper guide roller 3, a humidity sensor, a servo motor 7 and a controller 8, wherein the preheating cylinder 2 and the paper guide roller 3 are arranged on the frame 1, the humidity sensor is arranged at one end of paper feeding of the preheating cylinder 2, the servo motor 7 is arranged on the frame 1, and the controller 8 is respectively electrically connected with the humidity sensor and the servo motor 7; the preheating cylinder 2 is cylindrical, a preheating cavity 21 which is in contact with the corrugated paper is arranged in the preheating cylinder 2, the radian of a sector of the preheating cavity 21 is 120 degrees, and a steam inlet 210 is formed in the preheating cavity 21; the paper feeding side and the paper discharging side of the preheating cylinder 2 are respectively provided with a tension control mechanism 6 for controlling the tension of paper, the tension control mechanism 6 comprises a lifting cylinder 9, an electromagnetic valve 1) and a rotating wheel 11 arranged at the top of the lifting cylinder 9, the electromagnetic valve 10 is used for realizing the lifting of the lifting cylinder 9, and the electromagnetic valve 10 is electrically connected with the controller 8.

The paper guide rollers 3 are respectively arranged on the paper feeding side and the paper discharging side of the preheating cylinder 2. The paper is convenient to convey smoothly.

At least two paper guide rollers 3 are arranged. According to the actual process requirement, a paper guide roller 3 is respectively arranged on the paper feeding side and the paper discharging side of the preheating cylinder 2, so that the preheating requirement is met.

The rotor 11 includes a rotor body 110 and a supporting frame 111 supporting the rotor body 110.

The controller 8 is a programmed controller.

The preheating cavity 21 is communicated with a boiler, a groove 211 and a water vapor outlet 212 are arranged in the preheating cavity 21, the groove 211 is arranged at the bottom of the preheating cavity 21 and inclines towards the water vapor outlet 212, and a gas-liquid separator 22 is arranged at the water vapor outlet 212. The steam enters from the steam inlet 210 to heat the surface of the preheating cavity 21, when the paper is attached to the preheating cavity 21, the paper is preheated, as the temperature of the preheating cavity 21 is reduced, a part of steam in the preheating cavity 21 begins to be condensed into water, the water is gathered in the groove 211 and flows to the steam outlet 212, and finally flows out of the gas-liquid separator 22.

The gas-liquid separator 22 comprises a gas phase outlet 221 and a liquid phase outlet 222, the gas phase outlet 221 is communicated with the preheating cavity 21, the outlet end of the liquid phase outlet 222 is connected with a water return pipe 223, and the water return pipe 223 is communicated with the boiler. The steam entering the gas-liquid separator 22 enters the preheating chamber 21 again from the gas phase outlet 221, and the water flows out from the liquid phase outlet 222 and enters the boiler for reheating through the water return pipe 223.

The steam inlet 210 and the steam outlet 212 are respectively arranged at two ends of the preheating chamber 21. Preventing water vapor that has just entered the preheating chamber 21 from flowing directly out of the water vapor outlet 212.

The working process of the invention is as follows: in the winter corrugated paper production process, the indoor and outdoor temperature is low, the relative humidity is small, the water content of the raw paper from the corrugating machine is fast to diffuse, the water content of the raw paper tends to be consistent with the water content of the ambient air, firstly, when the paper conveying speed is fixed, the air humidity is measured through a humidity sensor, the measured air humidity value is transmitted to a controller 8, the controller 8 controls a tension control mechanism 6 on the paper feeding side of a preheater, and the dotted line in the figure is the paper movement track. When the measured air humidity is lower, the electromagnetic valve 10 is controlled to enable the lifting cylinder 9 to ascend, the rotating wheel 11 ascends along with the lifting cylinder to enable the tension borne by the paper to be smaller and prevent the paper from being broken, then the controller 8 controls the servo motor 7 to rotate according to a set program, and the servo motor 7 controls the preheating cylinder 2 to rotate clockwise, so that the attaching area of the paper and the preheating cavity 21 is reduced; when the air humidity is measured to be high, the controller 8 controls the electromagnetic valve 10 to enable the lifting cylinder 9 to descend, the rotating wheel 11 descends along with the lifting cylinder to enable the tension borne by the paper to be increased, the paper is prevented from being curled, then the servo motor 7 controls the preheating cylinder 2 to rotate anticlockwise, the attaching area of the paper and the preheating cylinder 2 is increased, after the preheating is finished, the controller 8 controls the tension control mechanism 6 on the paper outlet side of the preheater to prevent the preheated paper from being broken or curled in the conveying process, and finally the high-yield qualified corrugated paper is manufactured.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a preheater, includes frame (1), preheats jar (2), leads paper roll (3), preheat jar (2), lead paper roll (3) and set up in frame (1), its characterized in that: the automatic paper preheating device is characterized by further comprising a humidity sensor, a servo motor (7) and a controller (8), wherein the humidity sensor is arranged at one end of the preheating cylinder (2) for feeding paper, the servo motor (7) is arranged on the rack (1), and the controller (8) is respectively electrically connected with the humidity sensor and the servo motor (7); the preheating cylinder (2) is cylindrical, a preheating cavity (21) which is in contact with the corrugated paper is arranged in the preheating cylinder (2), the radian of a sector of the preheating cavity (21) is 120 degrees, and a steam inlet (210) is formed in the preheating cavity (21); preheat jar (2) paper feed one side and go out paper one side and respectively be equipped with one and be used for controlling tensile tension control mechanism (6) of paper, tension control mechanism (6) are including lift cylinder (9), solenoid valve (10) and set up runner (11) at lift cylinder (9) top, solenoid valve (10) are used for realizing the lift of lift cylinder (9), and solenoid valve (10) and controller (8) electricity federation, paper guide roll (3) respectively are equipped with one in the paper feed one side and play paper one side of preheating jar (2), preheat chamber (21) intercommunication has the boiler, preheat and be equipped with recess (211) and steam outlet (212) in the chamber (21), recess (211) set up in the bottom of preheating chamber (21) and to steam outlet (212) slope, steam outlet (212) department is equipped with vapour and liquid separator (22).

2. A preheater as recited in claim 1, wherein: at least two paper guide rollers (3) are arranged.

3. A preheater as recited in claim 1, wherein: the rotating wheel (11) comprises a rotating wheel body (110) and a supporting frame (111) for supporting the rotating wheel body (110).

4. A preheater as recited in claim 1, wherein: the controller (8) is a programmed controller.

5. A preheater as recited in claim 1, wherein: the gas-liquid separator (22) comprises a gas phase outlet (221) and a liquid phase (222) outlet, the gas phase outlet (221) is communicated with the preheating cavity (21), the outlet end of the liquid phase outlet (222) is connected with a water return pipe (223), and the water return pipe (223) is communicated with the boiler.

6. A preheater as recited in claim 1, wherein: the steam inlet (210) and the steam outlet (212) are respectively arranged at two ends of the preheating cavity (21).