Dry net cleaning device for paper machine

Abstract

The invention relates to the technical field of papermaking auxiliary equipment, in particular to a dry net cleaning device for a papermaking machine. The paper machine dry net cleaning device comprises a water washing head, an air inlet pipe, a hot air pipe and an air outlet pipe. The water washing head comprises a suction cover, the air outlet end of the suction cover is used for being connected with a vacuumizing device, the side wall of the suction cover is provided with a washing nozzle and a high-pressure air input hole, the washing nozzle faces the air inlet end of the suction cover and is used for being connected with a water source, and the high-pressure air input hole is located in the side, away from the air inlet end of the suction cover, of the washing nozzle. One end of the air inlet pipe is connected with a high-pressure air source, the other end of the air inlet pipe is divided into two paths, one path is communicated with the high-pressure air input hole, and the other path is sequentially communicated with the hot air pipe and the air outlet pipe. High-pressure gas is heated by the hot air pipe and can blow away the water curtain on the surface of the dry net, and the drying process of the water curtain is accelerated. The influence of the water curtain on the wet paper drying efficiency is effectively reduced, it is ensured that the surface of the dry net is clean, convenience is provided for bearing new wet paper, and the overall cleaning effect of the dry net cleaning device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of papermaking auxiliary equipment, and in particular to a papermaking machine dryer screen cleaning device. Background Art

[0002] In the papermaking process, after the wet paper is dried on the dryer net, it needs to be separated from the dryer net, which is then recycled and carries new wet paper.

[0003] After drying, some debris will remain on the surface of the dryer net, and the dryer net needs to be cleaned. At present, in order to improve the cleaning efficiency of the dryer net, water flushing or mechanical scraping is usually used, and in order to reduce the possibility of damage to the dryer net, water flushing is usually used.

[0004] In actual use, although a fan-shaped nozzle is used for water flushing, some water curtain will still remain on the surface of the dryer mesh, which may easily affect the subsequent drying efficiency of the paper and make the overall cleaning effect of the dryer mesh cleaning device poor. Summary of the invention

[0005] In order to improve the overall cleaning effect of the dryer fabric cleaning device, the present application provides a paper machine dryer fabric cleaning device.

[0006] The present application provides a paper machine dryer fabric cleaning device that adopts the following technical solution: A paper machine drying fabric cleaning device, comprising: A water washing head, the water washing head comprising a suction hood, the air outlet end of the suction hood being used to be connected to a vacuum device, a cleaning nozzle and a high-pressure gas input hole being provided on a side wall of the suction hood, the cleaning nozzle facing the air inlet end of the suction hood and being used to be connected to a water source, and the high-pressure gas input hole being located on a side of the cleaning nozzle away from the air inlet end of the suction hood; An air inlet pipe, one end of which is used to connect to a high-pressure gas source, and the other end is divided into two paths, one of which is connected to the high-pressure gas input hole, and the other is connected to the hot air pipe and the air outlet pipe in sequence.

[0007] By adopting the above technical solution, water flushing is combined with a suction hood and high-pressure hot air. After water flushing, the suction hood draws in air and uses the hot air pipe to heat it, blowing away the water curtain on the surface of the dryer net, accelerating the drying process of the water curtain. This method effectively reduces the impact of the water curtain on the drying efficiency of wet paper, ensures that the surface of the dryer net is clean, and provides convenience for receiving new wet paper, thereby improving the overall cleaning effect of the dryer net cleaning device.

[0008] Optionally, one end of the hot air pipe away from the air inlet pipe is connected to a plurality of the air outlet pipes.

[0009] By adopting the above technical solution, uniform distribution and efficient transfer of hot air can be achieved, thereby ensuring rapid evaporation of the water curtain on the surface of the drying network.

[0010] Optionally, a driving mechanism is further included, the air outlet pipe is a hose, the driving mechanism is fixed on the suction hood, connected to the air outlet pipe, and drives the air outlet pipe to move away from one end of the hot air pipe.

[0011] By adopting the above technical solution, the driving mechanism is fixed on the suction hood, and one end of the air outlet pipe (hose) is connected to the driving mechanism, so that the air outlet pipe can be moved away from the hot air pipe end. The driving mechanism can control the movement of the air outlet pipe, so that the hot air can be blown more accurately to a specific area on the surface of the drying net, thereby optimizing the distribution of the hot air and improving the drying efficiency.

[0012] Optionally, one end of the hot air pipe away from the air inlet pipe is connected to a plurality of the air outlet pipes; The driving mechanism is provided in plurality and is arranged one-to-one corresponding to the air outlet pipes, and the driving mechanism drives the end of the corresponding air outlet pipe away from the hot air pipe to move.

[0013] By adopting the above technical solution, multiple air outlet pipes and corresponding driving mechanisms are provided, and the independent control and mobility of each air outlet pipe away from the end of the hot air pipe is realized, so that the hot air can be blown to different areas of the drying net more accurately and evenly. Not only the utilization efficiency of the hot air is improved, but also the flexibility and adaptability of the drying process are enhanced, and the distribution and intensity of the hot air can be adjusted according to different drying requirements.

[0014] Optionally, the plurality of air outlet pipes are arranged in a circular array, the driving mechanism is located at the periphery of the air outlet pipes, and drives the air outlet pipes to approach or move away from the center of the plurality of air outlet pipes at the same time.

[0015] By adopting the above technical solution, multiple air outlet pipes are designed to be arranged in a circular array, and corresponding driving mechanisms are arranged on the periphery of the air outlet pipes, so that the air outlet pipes can move closer to or farther away from the center at the same time. This layout optimizes the uniform distribution of hot air and improves the drying efficiency. Since the air outlet pipes are evenly arranged around the center point, the hot air can cover the surface of the drying net more comprehensively, reducing dead corners during the drying process.

[0016] Optionally, an annular support plate is fixed on the suction hood, and the plurality of driving mechanisms are fixed on the annular support plate.

[0017] By adopting the above technical solution, multiple driving mechanisms are fixed on the annular support plate, and the structure of the entire device is more compact and stable. Since the driving mechanisms are evenly distributed on the annular support plate, they can synchronously operate the corresponding air outlet pipes to achieve precise control of the air outlet pipes.

[0018] Optionally, the air outlet pipe is movable away from one end of the hot air pipe so as to have an angle of 45° to 90° with the drying net.

[0019] By adopting the above technical solution, the hot air can be blown to the surface of the drying net at a more optimal angle, thereby improving the drying efficiency and uniformity of the hot air. This angle adjustment capability allows the device to be flexibly changed according to different drying needs, ensuring that the hot air can effectively blow away the water curtain and promote water evaporation, while avoiding unnecessary damage to the drying net.

[0020] Optionally, the driving mechanism is a one-way cylinder.

[0021] By adopting the above technical solution, the one-way cylinder has a simple structure, easy installation and low maintenance cost, which greatly improves the reliability of the system and the convenience of maintenance.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. Use water flushing combined with suction hood and high-pressure hot air. After water flushing, the suction hood draws in air and uses the hot air pipe to heat it, blowing away the water curtain on the surface of the dryer net and accelerating the drying process of the water curtain. This method effectively reduces the impact of the water curtain on the drying efficiency of wet paper, ensures the clean surface of the dryer net, and provides convenience for receiving new wet paper, thereby improving the overall cleaning effect of the dryer net cleaning device.

[0023] 2. Multiple high-pressure cleaning nozzles form a counter-attack to clean the dry net, and the dirty water after the counter-attack splashes directly upward into the suction hood. By introducing high-pressure air from the high-pressure air input hole, the high-pressure air flows into the suction hood. Under the action of the vacuum device, the high-pressure air is adsorbed on the inner wall of the suction chamber and moves upward, thus generating a negative pressure area in the suction hood. Therefore, the vacuum device can effectively suck the water mist under the suction hood and the dirty water splashed back, ensuring the cleanliness and dryness of the surrounding other papermaking process environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a paper machine dryer fabric cleaning device in Example 1 of the present application; Figure 2 yes Figure 1 A partial enlarged schematic diagram of Figure 3 It is a partial structural schematic diagram of a paper machine dryer fabric cleaning device in Example 2 of the present application; Figure 4 It is a schematic diagram of the structure of the air outlet pipe and the driving mechanism in Example 2 of the present application.

[0025] Description of reference numerals: 1. Water washing head; 11. Suction hood; 12. Cleaning nozzle; 13. High-pressure gas input hole; 2. Air inlet pipe; 3. Hot air pipe; 4. Air outlet pipe; 5. Driving mechanism; 6. Annular support plate. DETAILED DESCRIPTION

[0026] The following will be combined with the attached Figure 1-4 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0027] Embodiment 1: The present application discloses a paper machine dryer fabric cleaning device. Figure 1 The paper machine dryer network cleaning device includes a water washing head 1, a vacuum device (not shown in the figure), an air inlet pipe 2, a hot air pipe 3, an air outlet pipe 4 and a driving mechanism 5.

[0028] Reference Figure 2 The water washing head 1 includes a suction hood 11, the air inlet end of the suction hood 11 faces downward and toward the dry net, and the air outlet end of the suction hood 11 faces upward and is used to connect with a vacuum device. A cleaning nozzle 12 and a high-pressure gas input hole 13 are provided on the side wall of the suction hood 11. The cleaning nozzle 12 is located above the air inlet end, facing the air inlet end of the suction hood 11 and is used to connect with a water source (not shown in the figure), and the high-pressure gas input hole 13 is located on the side of the cleaning nozzle 12 away from the air inlet end of the suction hood 11, that is, located above the cleaning nozzle 12. Specifically, the specific structure of the water washing head 1 can be found in the invention patent with publication number CN113818275B (named A dry net cleaning component and device for a paper production line), which will not be described in detail here.

[0029] One end of the air inlet pipe 2 is used to connect to a high-pressure gas source (not shown in the figure), and the other end is divided into two paths, one of which is connected to the high-pressure gas input hole 13, and the other is connected to the hot air pipe 3 and the air outlet pipe 4 in sequence. A part of the normal temperature gas enters the suction hood 11 through the high-pressure gas input hole 13 to generate negative pressure, and the other part is heated by the hot air pipe 3 to generate high-temperature and high-pressure gas.

[0030] The suction hood 11 is provided with a plurality of high-pressure cleaning nozzles 12, the outlets of which are all oriented toward the middle of the air outlet end of the suction hood 11. The plurality of high-pressure cleaning nozzles 12 form a counter-attack to clean the dryer net, and the dirty water after the counter-attack directly splashes upward into the suction hood 11. By introducing high-pressure air from the high-pressure air input hole 13, the high-pressure air flows into the suction hood 11, and under the action of the vacuum device, the high-pressure air is adsorbed on the inner wall of the suction hood 11 and moves upward, thus generating a negative pressure area in the suction hood 11, so that the vacuum device can effectively suck the water mist under the suction hood 11 and the dirty water splashed upward, thereby ensuring the cleanliness and dryness of the surrounding other papermaking process environments.

[0031] In an optional embodiment, the air outlet pipe 4 can be a hard pipe. In this embodiment, the air outlet pipe 4 is a hose, and the driving mechanism 5 is fixed on the suction hood 11 and connected to the air outlet pipe 4. The driving mechanism 5 is a one-way cylinder, which drives the air outlet pipe 4 to move away from one end of the hot air pipe 3. The piston rod of the one-way cylinder can be connected to the air outlet pipe 4 through an elastic member or a flexible member, or can be slidably connected to the air outlet pipe 4 to avoid interference between the movement of the air outlet pipe 4 and the expansion and contraction of the piston rod of the one-way cylinder. The driving mechanism 5 can control the movement of the air outlet pipe 4, so that the hot air can be blown to a specific area on the surface of the dry net at different angles, impacting the water curtain on the dry net, and improving the drying efficiency. At the same time, this activity also enables the device to adapt to dry nets of different shapes and sizes, enhancing the versatility and practicality of the cleaning device. In addition, the design of the movable air outlet pipe 4 also helps to reduce the fixed length of the hot air pipe 3, facilitates the installation and maintenance of the device, and further improves the convenience and economy of operation.

[0032] The end of the air outlet pipe 4 away from the hot air pipe 3 is movable, with an angle of 45° to 90° with the drying net, so that the hot air can be blown to the surface of the drying net at a better angle, thereby improving the drying efficiency and uniformity of the hot air, ensuring that the hot air can effectively blow away the water curtain and promote water evaporation, while avoiding unnecessary damage to the drying net. In addition, the movement of the air outlet pipe 4 also helps to reduce the direct impact of the hot air on the drying net and extend the service life of the drying net.

[0033] The water flow flushing is combined with the suction hood 11 and high-pressure hot air. After the water flow flushing, the suction hood 11 draws in air and heats it with the hot air pipe 3 to blow away the water curtain on the surface of the dryer net, thereby accelerating the drying process of the water curtain. This method effectively reduces the influence of the water curtain on the drying efficiency of the wet paper, ensures that the surface of the dryer net is clean, and provides convenience for receiving new wet paper, thereby improving the overall cleaning effect of the dryer net cleaning device.

[0034] Embodiment 2: Reference Figure 3, the difference between Example 2 and Example 1 is that: the end of the hot air pipe 3 away from the air inlet pipe 2 is connected to a plurality of air outlet pipes 4, and a plurality of driving mechanisms 5 are provided, which are arranged one by one with the air outlet pipes 4, and the driving mechanism 5 drives the end of the corresponding air outlet pipe 4 away from the hot air pipe 3 to move. The number of air outlet pipes 2 and driving mechanisms 5 can be 2, 3, etc. In this way, the independent control and mobility of each air outlet pipe 4 away from the hot air pipe 3 are realized, so that the hot air can be blown to different areas of the dryer net more accurately and evenly. Not only the utilization efficiency of the hot air is improved, but also the flexibility and adaptability of the drying process are enhanced, and the distribution and intensity of the hot air can be adjusted according to different drying requirements. In addition, the independently controlled air outlet pipe 4 helps to reduce the waste of heat energy and improve the energy utilization rate. At the same time, it also reduces the paper drying quality problem caused by uneven heat distribution on the dryer net, and further improves the overall performance of the dryer net cleaning device and the drying efficiency of the paper.

[0035] Specifically, refer to Figure 4 , multiple air outlet pipes 4 are arranged in a circular array, and the driving mechanism 5 is located outside the air outlet pipes 4, and drives the air outlet pipes 4 to approach or move away from the center of the multiple air outlet pipes 4 at the same time. Since the air outlet pipes 4 are evenly arranged around the center point, the hot air can cover the surface of the drying net more comprehensively, reducing the dead angles during the drying process. Multiple air outlet pipes 4 blow toward the center of the mesh of the drying net at the same time, which can cause a greater impact force and is more conducive to removing the water curtain on the drying net.

[0036] The linkage control of the driving mechanism 5 ensures the consistency of the action of the air outlet pipe 4, making the hot air blowing more evenly, effectively avoiding the paper drying quality problems caused by uneven heat distribution. In addition, this design also simplifies the structure of the equipment, facilitates maintenance and operation, and improves the stability and reliability of the equipment.

[0037] Reference Figure 3 An annular support plate 6 is fixedly connected to the suction hood 11, and multiple driving mechanisms 5 are fixed on the annular support plate 6, so that the structure of the entire device is more compact and stable. The centralized layout of multiple driving mechanisms 5 helps to reduce the complexity of the connection lines and facilitates maintenance and overhaul.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A paper machine dryer fabric cleaning device, characterized in that: include: A water washing head (1), the water washing head (1) comprising a suction hood (11), the air outlet end of the suction hood (11) being used to be connected to a vacuum device, the side wall of the suction hood (11) being provided with a cleaning nozzle (12) and a high-pressure gas input hole (13), the cleaning nozzle (12) facing the air inlet end of the suction hood (11) and being used to be connected to a water source, the high-pressure gas input hole (13) being located on a side of the cleaning nozzle (12) away from the air inlet end of the suction hood (11); An air inlet pipe (2), one end of the air inlet pipe (2) is used to be connected to a high-pressure air source, and the other end is divided into two paths, one path is connected to the high-pressure air input hole (13), and the other path is connected to the hot air pipe (3) and the air outlet pipe (4) in sequence.

2. The paper machine dryer fabric cleaning device according to claim 1, characterized in that: One end of the hot air pipe (3) away from the air inlet pipe (2) is connected to a plurality of the air outlet pipes (4).

3. The paper machine dryer fabric cleaning device according to claim 1, characterized in that: It also comprises a driving mechanism (5), the air outlet pipe (4) is a hose, the driving mechanism (5) is fixed on the suction hood (11), connected to the air outlet pipe (4), and drives the air outlet pipe (4) to move away from one end of the hot air pipe (3).

4. The paper machine dryer fabric cleaning device according to claim 3, characterized in that: One end of the hot air pipe (3) away from the air inlet pipe (2) is connected to a plurality of air outlet pipes (4); The driving mechanisms (5) are provided in plurality and are arranged in one-to-one correspondence with the air outlet pipes (4). The driving mechanisms (5) drive the corresponding end of the air outlet pipe (4) away from the hot air pipe (3) to move.

5. The paper machine dryer fabric cleaning device according to claim 4, characterized in that: The plurality of air outlet pipes (4) are arranged in a circular array, the driving mechanism (5) is located at the periphery of the air outlet pipes (4), and drives the air outlet pipes (4) to approach or move away from the center of the plurality of air outlet pipes (4) simultaneously.

6. The paper machine dryer fabric cleaning device according to claim 5, characterized in that: An annular support plate (6) is fixed on the suction hood (11), and a plurality of driving mechanisms (5) are fixed on the annular support plate (6).

7. The paper machine dryer fabric cleaning device according to any one of claims 2 to 6, characterized in that: The air outlet pipe (4) is movable at one end away from the hot air pipe (3) so as to have an angle of 45° to 90° with the drying net.

8. The paper machine dryer fabric cleaning device according to any one of claims 3 to 6, characterized in that: The driving mechanism (5) is a one-way cylinder.

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