Watermark roller online cleaning device

Abstract

The utility model relates to the technical field of papermaking equipment, in particular to a watermark roller online cleaning device which comprises a watermark roller support, a watermark roller is installed on the watermark roller support, and a hydraulic cleaning device is arranged in the watermark roller. A watermark roller outer cover is arranged on the outer surface of the watermark roller, a pneumatic cleaning device is arranged on the watermark roller outer cover, the air spraying direction of the pneumatic cleaning device faces the surface of the watermark roller, and a water receiving disc is arranged at the bottom of the watermark roller outer cover. According to the utility model, the phenomenon of water throwing caused by excessive water stored on the watermark roller can be prevented while crushed paper pulp is prevented from being adhered to the watermark roller, the paper defect occurrence rate in the papermaking process is reduced, the papermaking quality is improved, and the papermaking efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking equipment, in particular to an online cleaning device for a watermark roller. Background Art

[0002] In the papermaking process, watermark rollers (also called finishing rollers) are often used to improve the surface quality of wet paper webs. Watermark rollers are hollow rollers with a mesh metal material (i.e. mesh surface) on the wall. When in use, the watermark rollers rotate on the surface of the wet paper web to flatten the wet paper web evenly. Using wet paper webs in the papermaking process helps to improve the smoothness and uniformity of the paper, improve the quality of the paper and improve the efficiency of papermaking production.

[0003] During use, some of the shredded paper pulp of the wet paper web will inevitably adhere to the mesh surface of the watermark roller. When the wet paper web is flattened by the watermark roller with shredded paper pulp on the mesh surface, paper defects such as pits and poor uniformity will be caused on the paper. In severe cases, it will cause paper machine breakage, affecting paper production efficiency. Therefore, in order to prevent paper defects or paper breaks caused by the adhesion of shredded paper pulp, the watermark roller needs to be cleaned in time to remove the shredded paper pulp adhering to the mesh surface.

[0004] In the existing papermaking process, the cleaning method of the watermark roller is mainly to use high-pressure water flushing or steam blowing. Among them, steam blowing is difficult to operate and has high risks. Therefore, most papermaking processes use high-pressure water flushing to clean the watermark roller. However, high-pressure water flushing will leave a large amount of water on the mesh surface of the watermark roller. Therefore, after cleaning, the watermark roller is prone to water throwing during the rotation process, and the water is thrown onto the wet paper web to leave marks, which in turn causes pits in the paper and affects the surface quality of the paper. Utility Model Content

[0005] In view of the existing high-pressure water flushing and cleaning method of the watermark roller, a large amount of water will be retained on the mesh surface of the watermark roller, which will cause the watermark roller to easily throw away water, resulting in pit paper defects. In order to solve the technical problem of affecting the surface quality of paper, the utility model provides an online cleaning device for the watermark roller, which can prevent the water from being thrown away due to excessive water on the watermark roller while avoiding the adhesion of shredded paper pulp on the watermark roller, thereby reducing the incidence of paper defects in the papermaking process, improving the quality of papermaking, and further improving the efficiency of papermaking.

[0006] The technical solution of the utility model is: an online cleaning device for a watermark roller, comprising a watermark roller bracket, a watermark roller is installed on the watermark roller bracket, a hydraulic cleaning device is arranged inside the watermark roller; a watermark roller outer cover is arranged on the outer surface of the watermark roller, a pneumatic cleaning device is arranged on the watermark roller outer cover, the jet direction of the pneumatic cleaning device is toward the surface of the watermark roller, and a water receiving tray is arranged at the bottom of the watermark roller outer cover.

[0007] Furthermore, the water spraying direction of the hydraulic cleaning device is vertically upward or obliquely upward; the water spraying direction of the pneumatic cleaning device is vertically downward or obliquely downward.

[0008] Furthermore, the hydraulic cleaning device includes a water spray pipe, which is arranged parallel to the axis of the watermark roller, and is provided with a high-pressure water nozzle group, and the water spray pipe is connected to the high-pressure water hose; the pneumatic cleaning device includes a jet pipe, which is arranged parallel to the axis of the watermark roller, and is provided with a compressed gas nozzle group, and the jet pipe is connected to the compressed gas tank.

[0009] Furthermore, the high-pressure water nozzle group is a single row of high-pressure water nozzles evenly arranged on the water spray pipe, and the interval between two adjacent high-pressure water nozzles is 10-20cm; the compressed gas nozzle group is a single row of compressed gas nozzles evenly arranged on the jet pipe, and the interval between two adjacent compressed gas nozzles is 10-20cm.

[0010] Furthermore, the water spray pipe and the air jet pipe are both made of stainless steel, which can have higher strength and stronger anti-corrosion and anti-rust properties.

[0011] Furthermore, the water spray pipe is connected to the water spray reciprocating motion device, and the air jet pipe is connected to the air jet reciprocating motion device. The water spray reciprocating motion device can drive the water spray pipe to reciprocate along the axis direction of the watermark roller, thereby avoiding dead corners during the water spray cleaning process; the air jet reciprocating motion device can drive the air jet pipe to reciprocate along the axis direction of the watermark roller, thereby avoiding dead corners during the air jet cleaning process and improving the cleaning effect.

[0012] Furthermore, the hydraulic cleaning device, the pneumatic cleaning device, the water spray reciprocating motion device, and the jet reciprocating motion device are electrically connected to the PLC control system respectively, and the PLC control system can be used to control parameters such as the water spray or jet time, the water spray volume or the jet volume, the reciprocating motion rate of the water spray reciprocating motion device or the jet reciprocating motion device of the hydraulic cleaning device and the pneumatic cleaning device to achieve automatic control.

[0013] Furthermore, the water receiving tray is connected to a drainage pipe, so that the waste water mixed with shredded paper pulp collected by the water receiving tray can be discharged in time.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides an online cleaning device for a watermark roller, wherein a hydraulic cleaning device is arranged inside the watermark roller and a pneumatic cleaning device is arranged outside the watermark roller. The hydraulic cleaning device can spray high-pressure water from the inside to the outside to flush out the shredded paper pulp adhering to the mesh surface of the watermark roller, and flush it thoroughly; the pneumatic cleaning device can blow the flushed shredded paper pulp and a large amount of water remaining on the mesh surface of the watermark roller into a water receiving tray, thereby preventing the shredded paper pulp from adhering to the watermark roller and preventing the water from being thrown off due to excessive water accumulation on the watermark roller, thereby reducing the incidence of paper diseases in the papermaking process, improving the papermaking quality, and further improving the papermaking efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a side view of the watermark roller online cleaning device in Example 1.

[0018] Figure 2 It is a side cross-sectional view of the watermark roller online cleaning device in Example 1.

[0019] In the figure, 1-watermark roller, 11-water spray pipe, 2-watermark roller bracket, 3-watermark roller outer cover, 31-air jet pipe, 32-water receiving tray, 33-drainage pipe. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] Example 1

[0022] A watermark roller online cleaning device comprises a watermark roller bracket 2, a watermark roller 1 is mounted on the watermark roller bracket 2, a hydraulic cleaning device is arranged inside the watermark roller 1, and the water spraying direction of the hydraulic cleaning device is vertically upward; the hydraulic cleaning device comprises a water spraying pipe 11, the water spraying pipe 11 is made of SUS304 stainless steel, the water spraying pipe 11 is arranged parallel to the axis of the watermark roller, a high-pressure water nozzle group is arranged on the water spraying pipe 11, and the water spraying pipe 11 is connected to a high-pressure water hose; the high-pressure water nozzle group is a single row of high-pressure water nozzles evenly arranged on the water spraying pipe, and the interval between two adjacent high-pressure water nozzles is 15 cm;

[0023] The water spray pipe 11 is connected to the water spray reciprocating motion device, which includes a first driving motor, a first gear is fixed to the rotating shaft of the first driving motor, the first gear is meshed with a first rack, the first rack is connected to the water spray pipe 11, the first rack is parallel to the water spray pipe 11, and the water spray pipe 11 can be driven to reciprocate along the axis direction of the watermark roller 1 by the forward and reverse rotation of the first driving motor;

[0024] The outer surface of the watermark roller 1 is provided with a watermark roller cover 3, and the bottom of the watermark roller cover 3 is provided with a water receiving tray 32, and the water receiving tray 32 is connected to a drainage pipe 33;

[0025] A pneumatic cleaning device is provided on the outer cover 3 of the watermark roller, and the jet direction of the pneumatic cleaning device is vertically downward and toward the surface of the watermark roller; the pneumatic cleaning device includes a jet pipe 31, the jet pipe 31 is made of SUS304 stainless steel, the jet pipe 31 is arranged parallel to the axis of the watermark roller, and a compressed gas nozzle group is arranged on the jet pipe 31, and the jet pipe 31 is connected to the compressed gas tank; the compressed gas nozzle group is a single row of compressed gas nozzles evenly arranged on the jet pipe, and the interval between two adjacent compressed gas nozzles is 15 cm;

[0026] The jet pipe 31 is connected to the jet reciprocating motion device, which includes a second driving motor, a second gear is fixed to the rotating shaft of the second driving motor, the second gear is meshed with the second rack, the second rack is connected to the jet pipe 31, and the second rack is parallel to the jet pipe 31. The jet pipe 31 can be driven to reciprocate along the axis direction of the watermark roller 1 by the forward and reverse rotation of the second driving motor;

[0027] The hydraulic cleaning device, the pneumatic cleaning device, the water spray reciprocating motion device and the air jet reciprocating motion device are electrically connected to the PLC control system respectively.

[0028] The operating principle of Example 1 is:

[0029] During the operation of the watermark roller 1 and the rotation to flatten the wet paper web, the PLC control system controls the hydraulic cleaning device, the pneumatic cleaning device, the water spray reciprocating motion device, and the air jet reciprocating motion device to start, and the high-pressure water nozzle group sprays high-pressure water vertically upward to flush the watermark roller 1 from the inside to the outside; the compressed gas nozzle group sprays compressed gas vertically downward to blow the shredded paper pulp flushed off the surface of the watermark roller and a large amount of water on the mesh surface of the watermark roller 1 into the water receiving tray 32 and discharge them through the drainage pipe 33; at the same time, the water spray reciprocating motion device drives the water spray pipe 11 to reciprocate along the axial direction of the watermark roller 1, and the air jet reciprocating device drives the water spray pipe 31 to reciprocate along the axial direction of the watermark roller 1, so as to improve the cleaning effect and realize online cleaning during the operation of the watermark roller 1.

[0030] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who is familiar with the present technical field may easily think of changes or substitutions within the technical scope disclosed in the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. An online cleaning device for a watermark roller, comprising a watermark roller bracket, on which a watermark roller is mounted, characterized in that: A hydraulic cleaning device is arranged inside the watermark roller; a watermark roller cover is arranged on the outer surface of the watermark roller, a pneumatic cleaning device is arranged on the watermark roller cover, the jet direction of the pneumatic cleaning device is toward the surface of the watermark roller, and a water receiving tray is arranged at the bottom of the watermark roller cover.

2. The watermark roller online cleaning device according to claim 1, characterized in that: The water spray direction of the hydraulic cleaning device is vertically upward or obliquely upward; the water spray direction of the pneumatic cleaning device is vertically downward or obliquely downward.

3. The watermark roller online cleaning device according to claim 1, characterized in that: The hydraulic cleaning device includes a water spray pipe, which is arranged parallel to the axis of the watermark roller, and is provided with a high-pressure water nozzle group, and the water spray pipe is connected to the high-pressure water hose; the pneumatic cleaning device includes an air jet pipe, which is arranged parallel to the axis of the watermark roller, and is provided with a compressed gas nozzle group, and the air jet pipe is connected to the compressed gas tank.

4. The watermark roller online cleaning device according to claim 3, characterized in that: The high-pressure water nozzle group is a single row of high-pressure water nozzles evenly arranged on the water spray pipe, and the interval between two adjacent high-pressure water nozzles is 10-20cm; the compressed gas nozzle group is a single row of compressed gas nozzles evenly arranged on the air jet pipe, and the interval between two adjacent compressed gas nozzles is 10-20cm.

5. The watermark roller online cleaning device according to claim 3, characterized in that: The water spray pipes and air jet pipes are both made of stainless steel.

6. The watermark roller online cleaning device according to claim 3, characterized in that: The water spray pipeline is connected with the water spray reciprocating motion device, and the air jet pipeline is connected with the air jet reciprocating motion device.

7. The watermark roller online cleaning device according to claim 6, characterized in that: The hydraulic cleaning device, the pneumatic cleaning device, the water spray reciprocating motion device and the air jet reciprocating motion device are electrically connected to the PLC control system respectively.

8. The watermark roller online cleaning device according to claim 1, characterized in that: The water tray is connected to the drainage pipe.

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