Device for preventing edge falling of paper guide roller of paper machine and paper machine

Abstract

The utility model relates to a device for preventing paper leading roller of paper machine and paper machine, including: paper leading portion and spraying portion, the paper leading portion includes paper leading roller, vacuum suction box and paper leading blanket, vacuum suction box is provided at the input end of paper leading roller, the paper leading blanket is covered outside the paper leading roller, and the spraying portion is provided with the vacuum suction box and the paper leading blanket. The vacuum suction box is covered with the paper injection blanket; the spraying part comprises at least two groups of spraying pipes and a plurality of sprayers, the at least two groups of spraying pipes are symmetrically arranged on two sides of the paper injection blanket, the at least two groups of spraying pipes are arranged between the vacuum suction box and the paper injection roller, the plurality of sprayers are arranged on the spraying pipes, and the sprayers directly face the paper injection blanket. According to the utility model, the problem of edge drop of the paper guide roller caused by high initial air permeability of the blanket can be avoided, and the operation efficiency of the paper machine is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a crane lighting technical field especially is a kind of device and paper machine for preventing paper machine leading paper roll edge falling. BACKGROUND

[0002] In the press section in papermaking section, wet paper passes through the suction of vacuum leading paper roll and is adsorbed on the lower surface of leading paper blanket, enters the press area.

[0003] In prior art, paper is in actual production, because the initial air permeability of blanket is too high, blanket is not saturated due to swelling, its surface cannot form water film to adsorb wet paper, wet paper often falls from the edge of leading paper roll, cannot be effectively adsorbed on leading paper blanket, forms crack in paper edge, causes paper break, affects the running efficiency of paper machine. UTILITY MODEL CONTENT

[0004] Therefore, the utility model wants to overcome the defect of paper machine leading paper roll edge falling in prior art.

[0005] To solve the above technical problem, the utility model provides a kind of device for preventing paper machine leading paper roll edge falling, comprising:

[0006] Leading paper part, the leading paper part includes leading paper roll, vacuum water suction tank and leading paper blanket, the vacuum water suction tank is arranged at the input end of the leading paper roll, the leading paper blanket is covered on the outside of the leading paper roll, and the leading paper blanket is covered on the vacuum water suction tank;

[0007] Spray part, at least two groups of the spray pipe and multiple spray heads are symmetrically arranged on the both sides of the leading paper blanket, and at least two groups of the spray pipe are arranged between the vacuum water suction tank and leading paper roll, multiple spray heads are arranged on the spray pipe, and the spray direction of the spray head is arranged opposite to the leading paper blanket.

[0008] In an embodiment of the utility model, the spray part further includes water inlet pipe, and the water inlet pipe is communicated with the spray pipe.

[0009] In an embodiment of the utility model, electromagnetic throttle valve is arranged on the pipeline of the water inlet pipe.

[0010] In an embodiment of the utility model, infrared humidity detector is arranged on the top of the leading paper blanket, and the infrared humidity detector is electrically connected with the electromagnetic throttle valve.

[0011] In an embodiment of the utility model, filter is arranged between the electromagnetic throttle valve and the spray head.

[0012] In one embodiment of this utility model, the axial direction of the spray pipe is parallel to the surface of the paper-feeding blanket.

[0013] In one embodiment of the present invention, the spray end of the nozzle is a low-pressure fan-shaped nozzle, and the spray angle of the nozzle is 75°.

[0014] In one embodiment of this utility model, the axial length of the vacuum suction box is greater than the width of the paper-feeding blanket.

[0015] In one embodiment of this utility model, the axial length of the paper-feeding roller is greater than the width of the paper-feeding blanket.

[0016] A paper machine includes the aforementioned device for preventing the paper feed rollers from slipping off.

[0017] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0018] This invention relates to a device and a papermaking machine for preventing the paper feed roller from slipping off its edge. The device uses a spray nozzle to apply water to both sides of the paper feed blanket, increasing the moisture content at the blanket edges. This allows the blanket to fully absorb water and swell, forming a water film on the blanket surface that can absorb wet paper sheets, thus ensuring better adhesion of the wet paper sheets to the blanket. This avoids the problem of the paper feed roller slipping off due to the initial high air permeability of the blanket, thereby improving the operating efficiency of the paper machine. Attached Figure Description

[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Fig. 1 This is a top view of the overall structure of this utility model;

[0021] Fig. 2 This is a side view of the overall structure of this utility model;

[0022] Explanation of reference numerals in the accompanying drawings: 1. Paper feeding section; 2. Spraying section; 11. Paper feeding roller; 12. Vacuum suction box; 13. Paper feeding blanket; 21. Spray pipe; 22. Nozzle; 23. Infrared humidity detector; 24. Filter; 25. Electromagnetic throttle valve; 26. Water inlet pipe. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention. Example 1

[0024] ReferenceFigs. 1-2 As shown, this utility model discloses a device for preventing the paper feed roller of a papermaking machine from falling off at the edge, comprising:

[0025] Paper feeding section 1, the paper feeding section 1 includes paper feeding roller 11, vacuum suction box 12 and paper feeding blanket 13, the vacuum suction box 12 is disposed at the input end of the paper feeding roller 11, the paper feeding blanket 13 covers the outside of the paper feeding roller 11 and the paper feeding blanket 13 covers the vacuum suction box 12.

[0026] The spray section 2 includes at least two sets of spray pipes 21 and multiple nozzles 22. The at least two sets of spray pipes 21 are symmetrically arranged on both sides of the paper feeding blanket 13 and are located between the vacuum suction box 12 and the paper feeding roller 11. The multiple nozzles 22 are arranged on the spray pipes 21 and are positioned directly opposite the paper feeding blanket 13.

[0027] The top of the paper-feeding blanket 13 in this invention is used to place and transfer wet paper, acting as a conveyor belt. It covers the top of the vacuum suction box 12. The vacuum suction box 12 utilizes the negative pressure generated by a vacuum pump to create a pressure difference between the upper and lower surfaces of the wet paper, thereby rapidly extracting moisture from the wet paper, achieving forced dehydration, increasing the paper's dryness, and creating favorable conditions for subsequent pressing and drying processes, thus improving production efficiency and paper quality. The paper-feeding roller 11 provides power to rotate and move the paper-feeding blanket 13, which in turn moves the wet paper. The entire spray section 2 is located after the vacuum suction box 12 and before the paper-feeding roller 11. Specifically, spray pipes 21 are symmetrically arranged on the top of both sides of the paper-feeding blanket 13, and multiple nozzles 22 are provided on the spray pipes 21, with the spray direction of the nozzles 22 facing the surface of the paper-feeding blanket 13. The spray is applied to both sides of the blanket. Water is sprayed onto both sides of the paper-feeding blanket 13 through the nozzle 22 to increase the moisture content of the blanket edges, so that the blanket edges can fully absorb water and swell, thereby forming a water film on the blanket surface that can absorb the wet paper, allowing the wet paper to better adhere to the blanket on both sides.

[0028] This invention uses nozzles 22 to spray water onto both sides of the paper feed blanket 13, increasing the moisture content at the edges of the blanket. This allows the blanket to fully absorb water and swell, forming a water film on the blanket surface that can absorb the wet paper sheet, thus allowing the wet paper sheet to better adhere to the blanket. This avoids the problem of the paper feed roller 11 falling off due to the high initial air permeability of the blanket, and improves the operating efficiency of the paper machine.

[0029] Furthermore, the spray unit 2 also includes a water inlet pipe 26, which is connected to the spray pipe 21; an electromagnetic throttle valve 25 is installed on the water inlet pipe 26.

[0030] Specifically, water is introduced into the spray pipe 21 through the water inlet pipe 26, and an electromagnetic throttle valve 25 is installed on the water inlet pipe 26 to control the flow rate and opening of the spray pipe 21.

[0031] Furthermore, an infrared humidity detector 23 is provided on the top of the paper-feeding blanket 13, and the infrared humidity detector 23 is electrically connected to the electromagnetic throttle valve 25.

[0032] Specifically, the humidity of the paper-feeding blanket 13 can be detected by the infrared humidity detector 23, utilizing the differences in the absorption and scattering characteristics of infrared light in different humidity media. When infrared light shines on the blanket, the humidity of the blanket is calculated based on the degree of absorption and scattering of infrared light by the moisture in the blanket. This detector is a non-contact detection method, which will not damage the blanket and has a fast detection speed. As a preferred embodiment of this utility model, the electromagnetic throttle valve 25 is electrically connected to the infrared humidity detector 23. The opening degree of the electromagnetic throttle valve 25 is controlled by the signal feedback from the infrared humidity detector 23, thereby controlling the humidity of the paper-feeding blanket 13.

[0033] Furthermore, a filter 24 is provided between the electromagnetic throttle valve 25 and the nozzle 22.

[0034] Specifically, the filter 24 is placed between the electromagnetic throttle valve 25 and the nozzle 22 to filter the water entering the nozzle 22, preventing clogging of the nozzle 22 from affecting normal use. As a preferred embodiment of this utility model, the filter 24 has a filtration accuracy of 80 mesh and can be cleaned at any time to prevent nozzle clogging.

[0035] Furthermore, the axial direction of the spray pipe 21 is parallel to the surface of the paper-feeding blanket 13. This ensures that the nozzle 22 can spray water onto the paper-feeding blanket 13 normally. Similarly, the vacuum suction box 12 and the paper-feeding roller 11 are also arranged perpendicular to the paper-feeding blanket 13.

[0036] As a preferred embodiment of this utility model, the spray end of the nozzle 22 is a low-pressure fan-shaped nozzle, and the spray angle of the nozzle 22 is 75°. The spray states of multiple nozzles overlap to ensure the spray range and spray rate of the nozzle 22.

[0037] Furthermore, the axial length of the vacuum suction box 12 is greater than the width of the paper-feeding blanket 13. The axial length of the paper-feeding roller 11 is greater than the width of the paper-feeding blanket 13.

[0038] Specifically, the length of the vacuum suction box 12 is greater than the length of the paper-feeding blanket 13, so that the entire paper-feeding blanket 13 can cover the vacuum suction box 12, ensuring the adsorption rate of the vacuum suction box 12. Similarly, the width of the paper-feeding roller 11 is greater than the length of the paper-feeding blanket 13, which can ensure that the paper-feeding blanket 13 can smoothly transport the wet paper. Example 2

[0039] A paper machine includes the device described in Embodiment 1 for preventing the paper feed rollers from falling off.

[0040] In summary, this utility model discloses a device and a papermaking machine for preventing the paper feed roller 11 from falling off at the edges. This utility model uses a spray nozzle 22 to add spray water to both sides of the paper feed blanket 13, increasing the moisture content at the edges of the blanket and allowing it to fully absorb water and swell. This forms a water film on the blanket surface that can absorb wet paper sheets, allowing the wet paper sheets to better adhere to the blanket. This avoids the problem of the paper feed roller 11 falling off due to the high initial air permeability of the blanket, thus improving the operating efficiency of the paper machine. Secondly, an electromagnetic throttling valve 25 is installed on the water inlet pipe 26 to control the flow rate and opening of the spray pipe 21. The electromagnetic throttling valve 25 is electrically connected to an infrared humidity detector 23. The opening of the electromagnetic throttling valve 25 is controlled by the signal feedback from the infrared humidity detector 23, thereby controlling the humidity of the paper feed blanket 13. Finally, a filter 24 is installed between the electromagnetic throttling valve 25 and the spray nozzle 22, allowing for easy cleaning of the filter 24 and preventing nozzle clogging.

[0041] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A device for preventing the paper feed roller of a papermaking machine from slipping off its edge, characterized in that, include: The paper feeding section includes a paper feeding roller, a vacuum suction box, and a paper feeding blanket. The vacuum suction box is located at the input end of the paper feeding roller, and the paper feeding blanket covers the outside of the paper feeding roller and is also covered by the vacuum suction box. The spray section includes at least two sets of spray pipes and multiple nozzles. The at least two sets of spray pipes are symmetrically arranged on both sides of the paper-feeding blanket, and the at least two sets of spray pipes are arranged between the vacuum suction box and the paper-feeding roller. The multiple nozzles are arranged on the spray pipes, and the spray direction of the nozzles is directed towards the paper-feeding blanket.

2. The device for preventing the paper feed roller of a papermaking machine from falling off its edge according to claim 1, characterized in that: The spray unit also includes a water inlet pipe, which is connected to the spray pipe.

3. The device for preventing the paper feed roller of a papermaking machine from falling off its edge according to claim 2, characterized in that: An electromagnetic throttle valve is installed on the water inlet pipe.

4. The device for preventing the paper feed roller of a papermaking machine from slipping off its edge according to claim 3, characterized in that: An infrared humidity detector is provided on the top of the paper-feeding blanket, and the infrared humidity detector is electrically connected to the electromagnetic throttle valve.

5. The device for preventing the paper feed roller of a papermaking machine from falling off its edge according to claim 3, characterized in that: A filter is provided between the electromagnetic throttle valve and the nozzle.

6. The device for preventing the paper feed roller of a papermaking machine from slipping off its edge according to claim 1, characterized in that: The axis of the spray pipe is parallel to the surface of the paper-feeding blanket.

7. The device for preventing the paper feed roller of a papermaking machine from slipping off its edge according to claim 1, characterized in that: The nozzle has a low-pressure fan-shaped nozzle at the spray end, and the spray angle of the nozzle is 75°.

8. The device for preventing the paper feed roller of a papermaking machine from slipping off its edge according to claim 1, characterized in that: The axial length of the vacuum suction box is greater than the width of the paper-feeding blanket.

9. The device for preventing the paper feed roller of a papermaking machine from slipping off its edge according to claim 1, characterized in that: The axial length of the paper feed roller is greater than the width of the paper feed blanket.

10. A papermaking machine, characterized in that, Includes the device for preventing the paper feed roller of a papermaking machine from falling off as described in any one of claims 1-9.

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