An automatic water spraying device based on water jet changing to prevent waste paper from being thrown.

Abstract

This utility model discloses an automatic water spraying device for preventing waste paper from being thrown during paper roll changing based on water jets, relating to the field of paper roll changing technology. It includes a workbench, and a water spraying mechanism is provided on the outer surface of the frame. The water spraying mechanism includes paper rolls arranged sequentially along the length of the frame. A nozzle is provided on each side of the frame, located on one side of the lower end of the paper rolls, and below the operating and transmission sides of the paper rolls, respectively. The spray holes are elongated, with their length extending along the width of the paper web. This automatic water spraying device for preventing waste paper from being thrown during paper roll changing effectively prevents waste paper from being thrown during the process through its water spraying mechanism. The nozzles are connected to a main pipe via branch pipes, and a solenoid valve is installed on the main pipe. The solenoid valve is electrically connected to a controller, which allows for precise control of the timing and volume of water spraying, further improving the automation level and spraying effect of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of paper roll changing technology, specifically an automatic water spraying device based on water jet roll changing to prevent waste paper from being thrown. Background Technology

[0002] The papermaking process and its post-processing involve winding, rewinding, and other processes. In these processes, roll changing is required. That is, the paper web is continuously wound onto the winding roll that is in contact with the surface of the winding cylinder to form a master roll. When the master roll reaches the specified diameter, a new winding roll is accelerated and pressed down to contact the surface of the winding cylinder. The paper machine then separates the continuous paper web from the master roll and winds it onto the new winding roll through the roll changing device.

[0003] However, existing roll-changing equipment is prone to paper tail slippage at the finished paper output position, resulting in paper waste.

[0004] To address the aforementioned shortcomings, Chinese Patent No. CN213976302U discloses a device for reducing waste at the end of paper rolls during water jetting. This device includes a first conveyor roller, a second conveyor roller, and a mother roller mounted on one side of a column. Paper sequentially passes over the first and second conveyor rollers and then onto the mother roller. A crossbar is mounted on the column, with a second and a third bracket mounted at each end. The third bracket is mounted at the front end of the second bracket and can rotate around its connection point. A glue spray head is mounted on the third bracket. The third bracket is L-shaped and includes a main bracket and a secondary bracket. The glue spray head is mounted on the secondary bracket, which has an adjusting slot at its front end. A bolt is welded to the third bracket, inserted into the adjusting slot, and secured to the secondary bracket with a nut. By mounting the glue spray head on the third bracket, which is rotatably mounted on the second bracket, and adjusting the angle of the third bracket on the second bracket, the installation angle of the glue spray head can be flexibly adjusted, thus improving production efficiency.

[0005] The above-mentioned device allows for easy adjustment of the spray nozzle angle by rotating the bracket three during use. However, after the device is changed, the paper roll is still running at high speed, and waste paper on both sides of the paper roll is easily thrown into the paper machine, affecting paper breakage and resulting in paper waste. Utility Model Content

[0006] The purpose of this invention is to provide an automatic water spraying device based on water jet changing to prevent waste paper from being thrown into the paper machine, thus solving the problem mentioned in the background art where waste paper on both sides of the paper roll is easily thrown into the paper machine and affects paper breakage because the paper roll is still running at high speed.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an automatic water spraying device based on water jet roll changing to prevent waste paper from being thrown, comprising a workbench, a base provided on the bottom surface of the workbench, two sets of symmetrical fixed frames provided on the top of the workbench, a frame provided at the end of the workbench away from the fixed frames, and a water spraying mechanism for assisting roll changing provided on the outer surface of the frame; the water spraying mechanism includes rolls of paper arranged sequentially along the length of the frame, and a nozzle provided on each side of the frame, the two nozzles being located on one side of the lower end of the rolls of paper, and the two nozzles being located below the operating side and the transmission side of the rolls of paper, respectively, the spray holes of the two nozzles being oriented towards the paper web of the rolls of paper, the spray holes being elongated, and the length of the elongated spray holes being along the width of the paper web.

[0008] Furthermore, a rotating roller is provided on the inner side of the fixing frame, and a guide roller is also provided on the inner side of the fixing frame.

[0009] Furthermore, a support is provided at the top of the workbench, a servo motor is provided on the outer surface of the workbench, and an output shaft is provided at the output end of the servo motor.

[0010] Furthermore, a transmission roller is provided on the outer surface of the output shaft, a bracket is provided on the outer surface of the transmission roller, and a positioning roller is provided on the inner side of the bracket.

[0011] Furthermore, the two nozzles are respectively connected to branch pipes, and the nozzles are connected to the main pipe through the branch pipes, and a valve is provided on the main pipe.

[0012] Furthermore, the main pipes extend upward from the bottom of both sides of the frame along the frame surface and are respectively connected to two nozzles, and the main pipes are respectively fixed on both sides of the frame.

[0013] Furthermore, the valve is a solenoid valve, and the solenoid valve is electrically connected to the controller.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) By setting up a water spraying mechanism, waste paper can be effectively prevented from swinging during the roll changing process. When the paper roll reaches the specified diameter and needs to be replaced, the new paper roll starts to accelerate and contact the paper roll cylinder. At this time, the water spraying mechanism is activated, and two nozzles spray water onto the paper web below the paper roll at the same time to increase the humidity and weight of the paper web and ensure stability during paper changing.

[0016] (2) The water spray holes are set in a long strip shape, with the length set along the width of the paper web. Therefore, water can be sprayed evenly on the paper web, making it less likely for the paper web to swing during the roll change process, effectively avoiding the problem of waste paper being thrown into the paper machine and affecting paper breakage.

[0017] (3) The nozzles are connected to the main pipe through branch pipes. The main pipe is equipped with a solenoid valve, which can be used to precisely control the timing and amount of water spraying through the controller, thereby further improving the automation level and water spraying effect of the equipment.

[0018] (4) The rotating rollers and guide rollers installed on the inner side of the fixed frame can guide and support the paper web, ensuring the stability and accuracy of the paper web during the transmission process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the workbench of this utility model;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the positioning roller of this utility model;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the paper roll of this utility model;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the main pipe of this utility model;

[0024] Figure 6 This is a three-dimensional structural diagram of the valve of this utility model.

[0025] In the diagram: 1. Workbench; 2. Base; 3. Fixing frame; 4. Rotating roller; 5. Guide roller; 6. Support; 7. Servo motor; 8. Output shaft; 9. Transmission roller; 10. Positioning roller; 11. Frame; 12. Paper roll roller; 13. Main pipe; 14. Valve; 15. Nozzle. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1: Please refer to Figure 1 - Figure 2The present invention provides the following technical solution: an automatic water spraying device based on water jet roll changing to prevent waste paper from being thrown, including a workbench 1, a base 2 provided on the bottom surface of the workbench 1, two sets of symmetrical fixed frames 3 provided on the top of the workbench 1, a frame 11 provided at the end of the workbench 1 away from the fixed frames 3, and a water spraying mechanism for auxiliary roll changing provided on the outer surface of the frame 11; the water spraying mechanism includes a paper roll 12 arranged sequentially along the length direction of the frame 11, and a nozzle 15 provided on each side of the frame 11, the two nozzles 15 being located on one side of the lower end of the paper roll 12, and the two nozzles 15 being located below the operating side and the transmission side of the paper roll 12 respectively, the water spray holes of the two nozzles 15 being arranged facing the paper web of the paper roll 12, the water spray holes being elongated, and the length of the elongated water spray holes being arranged along the width direction of the paper web.

[0028] The water spray mechanism effectively prevents waste paper from swaying during roll changing. During operation, high-pressure water (up to 1800 bar) cuts out the paper head in the middle of the paper web. Adhesive sprayed by a high-pressure glue pump then smoothly winds the paper head onto the new roll, while simultaneously and symmetrically cutting from the center to the edge at high speed, completing the roll change. When the paper on the roll 12 is about to be changed, the nozzle 15 sprays fine water jets, evenly misting both sides of the paper web to increase its moisture and weight, thus suppressing the swaying of waste paper during high-speed operation. The elongated water spray nozzle design... The water mist can evenly cover the entire width of the paper, ensuring that every part of the paper is fully wetted, avoiding the problem of paper splattering caused by uneven wetting. The nozzle 15 is located on one side of the lower end of the paper roll 12, and is located below the operating side and the transmission side respectively. This layout ensures that the water mist can directly act on both sides of the paper to achieve the best anti-splattering effect. By setting up solenoid valves and controllers, precise control of the water spraying mechanism can be achieved. During the roll changing process, the controller controls the opening and closing of the solenoid valves according to the preset program or sensor signals, thereby adjusting the water spraying time and water volume of the nozzle 15.

[0029] Example 2: Based on Example 1, please refer to... Figure 2 - Figure 4 The transmission roller 9 was also disclosed, and its specific structure is as follows: a rotating roller 4 is provided on the inner side of the fixed frame 3, a guide roller 5 is also provided on the inner side of the fixed frame 3, a bracket 6 is provided on the top of the worktable 1, a servo motor 7 is provided on the outer surface of the worktable 1, an output shaft 8 is provided at the output end of the servo motor 7, a transmission roller 9 is provided on the outer surface of the output shaft 8, a bracket 6 is provided on the outer surface of the transmission roller 9, and a positioning roller 10 is provided on the inner side of the bracket 6.

[0030] The paper can be conveyed and guided by the coordinated operation of the transmission roller 9, positioning roller 10, rotating roller 4, and guide roller 5. Figure 3As can be seen, the servo motor 7 can drive the output shaft 8 to rotate, and the output shaft 8 drives the transmission roller 9 to rotate, thereby transporting the paper. The positioning roller 10 can position the paper to prevent the paper from shifting during transport. The rotating roller 4 and the guide roller 5 can guide the paper so that the paper can be smoothly transported to the paper roll 12.

[0031] Example 3: Based on Example 1, please refer to... Figure 3 - Figure 6 The nozzle 15 was also disclosed, and its specific structure is as follows: two nozzles 15 are connected to branch pipes respectively. The nozzles 15 are connected to the main pipe 13 through the branch pipes. A valve 14 is provided on the main pipe 13. The main pipe 13 extends upward from the bottom of both sides of the frame 11 along the surface of the frame 11 and is connected to the two nozzles 15 respectively. The main pipe 13 is fixed on both sides of the frame 11. The valve 14 is a solenoid valve, and the solenoid valve is electrically connected to the controller.

[0032] Through the set nozzle 15, by Figure 6 It is known that water can be sprayed onto the paper web during roll changing, causing the waste paper on both sides of the paper web to adhere to the paper web due to the adhesive effect of the water. This prevents the waste paper from being thrown into the paper machine during the high-speed rotation of the paper roll, affecting paper breakage and thus causing paper waste. Simply wetting two to three layers of paper edges on the surface of the paper roll increases the running resistance of the paper roll, which can reduce the situation of waste paper being thrown from both sides during the paper roll operation during roll changing. At the same time, the solenoid valve is electrically connected to the controller, which can control the opening and closing of the solenoid valve, thereby controlling the water spraying of nozzle 15. When roll changing is required, the controller controls the solenoid valve to open, and nozzle 15 sprays water onto the paper web. When roll changing is completed, the controller controls the solenoid valve to close, and nozzle 15 stops spraying water. The operation is simple and can effectively solve the problem that waste paper on both sides of the paper roll is easily thrown into the paper machine and affects paper breakage when the paper roll is still rotating at high speed.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic water spraying device based on water jet roll changing to prevent waste paper from being thrown, comprising a workbench (1), wherein a base (2) is provided on the bottom surface of the workbench (1), characterized in that: The top of the workbench (1) is provided with two sets of symmetrical fixed frames (3), and a frame (11) is provided at one end of the workbench (1) away from the fixed frames (3). The outer surface of the frame (11) is provided with a water spraying mechanism to assist in changing the roll. The water spraying mechanism includes a paper roll (12) arranged sequentially along the length of the frame (11). A nozzle (15) is provided on each side of the frame (11). The two nozzles (15) are located on one side of the lower end of the paper roll (12), and the two nozzles (15) are respectively located below the operating side and the transmission side of the paper roll (12). The water spray holes of the two nozzles (15) are arranged facing the paper web of the paper roll (12). The water spray holes are arranged in a long strip shape, and the length of the long strip water spray hole is arranged along the width direction of the paper web.

2. The automatic water spraying device based on water jet changing to prevent waste paper from being thrown, as described in claim 1, is characterized in that: The inner side of the fixed frame (3) is provided with a rotating roller (4), and the inner side of the fixed frame (3) is also provided with a guide roller (5).

3. The automatic water spraying device based on water jet changing to prevent waste paper from being thrown, as described in claim 1, is characterized in that: The top of the workbench (1) is provided with a bracket (6), the outer surface of the workbench (1) is provided with a servo motor (7), and the output end of the servo motor (7) is provided with an output shaft (8).

4. An automatic water spraying device based on water jet changing to prevent waste paper from being thrown, as described in claim 3, is characterized in that: The outer surface of the output shaft (8) is provided with a transmission roller (9), the outer surface of the transmission roller (9) is provided with a bracket (6), and the inner side of the bracket (6) is provided with a positioning roller (10).

5. An automatic water spraying device based on water jet changing to prevent waste paper from being thrown, as described in claim 1, is characterized in that: The two nozzles (15) are respectively connected to the branch pipe. The nozzles (15) are connected to the main pipe (13) through the branch pipe, and the main pipe (13) is equipped with a valve (14).

6. An automatic water spraying device based on water jet changing to prevent waste paper from being thrown, as described in claim 5, is characterized in that: The main pipe (13) extends upward from the bottom of both sides of the frame (11) along the surface of the frame (11) and is connected to the two nozzles (15) respectively. The main pipe (13) is fixed on both sides of the frame (11).

7. An automatic water spraying device based on water jet changing to prevent waste paper from being thrown, as described in claim 5, is characterized in that: The valve (14) is a solenoid valve, which is electrically connected to the controller.

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