A veneer press with a roll cone guiding function
By introducing guiding, displacement, and rotation mechanisms into the plate rolling machine, the problem of steel plate deviation caused by uneven force during the rolling process is solved, achieving high-precision tapered forming and equipment protection.
Patent Information
- Application Number
- CN202521257096.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-18
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-06-18
AI Technical Summary
In traditional plate rolling machine processing, especially when rolling conical workpieces, steel plates are prone to lateral displacement due to material irregularities and uneven stress, which affects processing quality and increases equipment wear.
Design a plate rolling machine with a tapered guiding function, including a guiding mechanism, a displacement mechanism and a rotating mechanism. The guiding mechanism contacts the edge of the plate to form a reverse force to counteract the offset tendency. The displacement mechanism adjusts the position of the pressure roller, and the rotating mechanism provides rotational power to ensure that the plate is formed along a predetermined trajectory.
It effectively prevents steel plate misalignment, improves forming accuracy and product consistency, reduces equipment wear, and enhances the stability and precision of the rolling process.
Smart Images

Figure CN224673544U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of metal plate rolling technology, and in particular to a plate rolling machine with a tapered guiding function. Background Technology
[0002] A plate rolling machine is an industrial device used to process metal sheets into arc-shaped, cylindrical, or conical workpieces through a roll forming process. It mainly consists of an upper roller, lower roller, side rollers, a transmission system, a frame, and a control system. The plate rolling machine utilizes the rotation and pressure of the rollers to cause plastic deformation of the sheet metal, thereby rolling it into the desired curved shape. It is widely used in industries such as petrochemicals, pressure vessels, shipbuilding, wind turbine towers, and steel structures.
[0003] In traditional plate rolling processes, especially when rolling conical workpieces, the irregularity of the material itself and uneven stress can cause the steel plate to shift laterally during the rolling process. This can lead to the steel plate shifting towards the plate rolling machine body, which not only affects the processing quality but also increases the wear and tear on the equipment. Utility Model Content
[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a plate rolling machine with a conical guide function, which can effectively prevent steel plate deviation, improve forming accuracy and product consistency, and reduce equipment wear while reducing scrap rate.
[0005] A plate rolling machine with a conical guide function according to an embodiment of the present invention includes a frame; an upper pressure roller rotatably mounted on the frame; a lower pressure roller movably mounted on the frame, located directly below the upper pressure roller and extending in the same direction as the upper pressure roller; two side pressure rollers movably mounted on the frame, symmetrically arranged on opposite sides of the lower pressure roller; and a guide mechanism mounted on the frame, located on one side of the end of the upper pressure roller, the guide mechanism being used to prevent the plate from shifting towards the frame during the conical operation.
[0006] The plate rolling machine with conical guiding function according to the present utility model has at least the following beneficial effects: when the plate deviates towards the frame due to asymmetrical force during the conical operation, the guiding mechanism contacts the edge of the plate to form a reverse force, thereby offsetting the deviation trend caused by uneven material force and ensuring that the plate is formed along a predetermined trajectory. This realizes the synchronization of rolling and correction functions and improves the forming accuracy of the plate.
[0007] According to some embodiments of the present invention, it further includes: a displacement mechanism, which is connected to the lower pressure roller and the side pressure roller respectively, and is used to drive the lower pressure roller and the side pressure roller to cooperate with the upper pressure roller to clamp the plate, so as to adjust the curvature of the plate; and a rotation mechanism, which is connected to the upper pressure roller, the lower pressure roller and the side pressure roller respectively, and is used to provide rotational power to the upper pressure roller, the lower pressure roller and the side pressure roller.
[0008] According to some embodiments of the present invention, the guiding mechanism includes two guide members, which are disposed on the frame. The two guide members are disposed near the ends of the upper pressure roller and are symmetrically disposed on opposite sides of the upper pressure roller.
[0009] According to some embodiments of the present invention, the guide includes two fixed seats and a guide roller disposed between the two fixed seats. Both fixed seats are disposed on the frame, and the guide roller is configured to abut against the sheet material being rolled to prevent the sheet material from shifting toward the frame.
[0010] According to some embodiments of the present invention, the guide roller is inclined, the horizontal distance between the upper end of the guide roller and the upper pressure roller is d1, and the horizontal distance between the lower end of the guide roller and the upper pressure roller is d2, wherein d1 < d2.
[0011] According to some embodiments of the present invention, a cleaning mechanism is also included. The cleaning mechanism is mounted on the frame and connected to the lower pressure roller and the side pressure roller. The cleaning mechanism is used to clean the surfaces of the lower pressure roller and the side pressure roller to ensure processing accuracy.
[0012] According to some embodiments of the present invention, the cleaning mechanism includes two cleaning rollers, which are vertically and rotatably mounted on the frame. The cleaning rollers are rotatably connected to the frame. Each side pressure roller and the lower pressure roller are respectively provided with a cleaning roller. The cleaning roller is located on the vertical line between the lower pressure roller and the side pressure roller. The cleaning roller is located below the lower pressure roller and the side pressure roller. The cleaning roller and the lower pressure roller extend in the same direction. The outer wall of the cleaning roller is evenly provided with cleaning brushes, which are used to brush the lower pressure roller and the side pressure roller.
[0013] According to some embodiments of the present invention, the cleaning roller has a plurality of water outlet holes, which are evenly distributed on the wall surface of the cleaning roller, and the interior of the cleaning roller is connected to the outside through the plurality of water outlet holes.
[0014] According to some embodiments of the present invention, the cleaning mechanism further includes: a drive assembly, which is mounted on the frame and is connected to two cleaning rollers respectively, and is used to drive the cleaning rollers to rise and fall; and a water supply assembly, which is mounted on the frame and is connected to the two cleaning rollers respectively, and is used to supply cleaning water to the interior of the cleaning rollers.
[0015] According to some embodiments of this utility model, a water collection trough is provided on the frame. The water collection trough is located below the lower pressure roller and the side pressure roller. The water collection trough has a drain outlet and is used to collect and discharge cleaning water.
[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0018] Figure 1 This is a schematic diagram of the structure of a plate rolling machine with a cone-shaped guiding function according to an embodiment of the present invention;
[0019] Figure 2 for Figure 1 A schematic diagram of the guiding mechanism in the diagram;
[0020] Figure 3 for Figure 1 A cross-sectional perspective view in the middle;
[0021] Figure 4 for Figure 1 A schematic diagram of the structure of the cleaning roller.
[0022] Figure label:
[0023] Frame 100, water collection tank 110, drain outlet 120;
[0024] Upper pressure roller 200;
[0025] Lower pressure roller 300;
[0026] Side pressure roller 400;
[0027] Guide mechanism 500, guide component 510, fixed base 511, guide roller 512;
[0028] The cleaning mechanism 600, the cleaning roller 610, the cleaning brush 611, the water outlet 612, the drive assembly 620, and the water supply assembly 630 are included. Detailed Implementation
[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the description mentions "first" or "second," it is merely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or the sequential relationship between indicated technical features.
[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0032] refer to Figures 1 to 4 This embodiment discloses a plate rolling machine with a tapered guide function.
[0033] like Figures 1 to 4 As shown, a plate rolling machine with a tapered guiding function includes a frame 100, an upper pressure roller 200, a lower pressure roller 300, two side pressure rollers 400, and a guiding mechanism 500. The upper pressure roller 200 is rotatably mounted on the frame 100, and the lower pressure roller 300 is movably mounted on the frame 100, located directly below the upper pressure roller 200 and extending in the same direction as the upper pressure roller 200. Both side pressure rollers 400 are movably mounted on the frame 100 and symmetrically arranged on opposite sides of the lower pressure roller 300. The guiding mechanism 500 is mounted on the frame 100 and located on one side of the end of the upper pressure roller 200. The guiding mechanism 500 prevents the plate from shifting towards the frame 100 during the tapering operation.
[0034] like Figure 1 As shown, the frame 100 is equipped with an upper pressure roller 200, a lower pressure roller 300, and two side pressure rollers 400 extending in the left-right direction. The lower pressure roller 300 is located directly below the upper pressure roller 200, and the two side pressure rollers 400 are located below the upper pressure roller 200 and symmetrically arranged on the front and rear sides of the lower pressure roller 300. The upper pressure roller 200, lower pressure roller 300, and two side pressure rollers 400 can all rotate around the axial direction, and the lower pressure roller 300 and two side pressure rollers 400 can move on the frame 100 to move closer to or away from the upper pressure roller 200. A guide mechanism 500 is provided on the frame 100, located at the left end of the upper pressure roller 200. The guide mechanism 500 cooperates with the upper pressure roller 200, lower pressure roller 300, and side pressure rollers 400. When the sheet metal is subjected to asymmetrical force towards the frame 100 during the tapering operation, i.e.... Figure 1When the material shifts to the left, the guide mechanism 500 contacts the edge of the sheet to form a reverse force, thereby counteracting the shifting trend caused by uneven material stress and ensuring that the sheet is formed along the predetermined trajectory. This achieves the synchronization of rolling and correction functions and improves the forming accuracy of the sheet.
[0035] In some specific embodiments of this utility model, a displacement mechanism and a rotation mechanism are also included. The displacement mechanism is connected to the lower pressure roller 300 and the side pressure roller 400 respectively. The displacement mechanism is used to drive the lower pressure roller 300 and the side pressure roller 400 to cooperate with the upper pressure roller 200 to clamp the sheet metal, so as to adjust the curvature of the sheet metal. Specifically, the displacement mechanism changes the contact position and pressure distribution between the pressure roller and the sheet metal by driving the lower pressure roller 300 and the side pressure roller 400 to achieve flexible adjustment of curvature. The rotation mechanism is connected to the upper pressure roller 200, the lower pressure roller 300 and the side pressure roller 400 respectively. The rotation mechanism is used to provide rotational power to the upper pressure roller 200, the lower pressure roller 300 and the side pressure roller 400. Specifically, the rotation mechanism synchronously drives each roller shaft to rotate, ensuring that the sheet metal is subjected to uniform force during the rolling process and avoiding slippage or deviation. The synergistic effect of the rotation mechanism and the displacement mechanism enables the sheet metal to maintain stable forming during dynamic adjustment, improving processing accuracy and efficiency.
[0036] Specifically, the displacement mechanism can use hydraulic cylinders, servo motors or lead screw drives to adjust the positions of the lower pressure roller 300 and the side pressure roller 400. The rotation mechanism consists of a motor, a reducer and transmission gears, which drive the upper pressure roller 200, the lower pressure roller 300 and the side pressure roller 400 to rotate synchronously or differentially to adapt to the processing requirements of plates with different thicknesses and curvatures. The above displacement driving method and rotation driving method are conventional driving means, and will not be described in detail here.
[0037] In some specific embodiments of this utility model, the guiding mechanism 500 includes two guide members 510, which are disposed on the frame 100. The two guide members 510 are disposed near the ends of the upper pressure roller 200, and are symmetrically arranged on opposite sides of the upper pressure roller 200. Figure 1 As shown, both guide members 510 are set at the left end of the frame 100. By symmetrically setting two guide members 510 on the front and rear sides of the upper pressure roller 200, a two-way constraint is formed during the plate rolling process, preventing the plate from shifting to one side due to uneven force, thereby ensuring that the plate moves stably along the predetermined trajectory and improving the accuracy and stability of the tapering operation.
[0038] In some specific embodiments of this utility model, the guide member 510 includes two fixed seats 511 and a guide roller 512 disposed between the two fixed seats 511. Both fixed seats 511 are disposed on the frame 100. The guide roller 512 is configured to abut against the sheet material being rolled to prevent the sheet material from shifting towards the frame 100.
[0039] like Figure 1 and Figure 2 As shown, one end of the guide roller 512 is connected to one fixed seat 511, and the other end is connected to another fixed seat 511. Both fixed seats 511 are fixed on the frame 100 to provide rigid support. During the rolling process, the sheet moves back and forth along the front and rear sides of the upper pressure roller 200. The guide roller 512 dynamically contacts the edge of the sheet. Its symmetrical arrangement can balance the constraint forces on both sides of the sheet, thus making the rolling process smoother.
[0040] Furthermore, the guide roller 512 is rotatably connected to the fixed base 511. The rotatable guide roller 512 makes rolling contact with the edge of the plate, which reduces frictional resistance while limiting the lateral displacement of the plate and avoids scratching the surface of the plate. This ensures both rolling accuracy and processing quality and equipment life.
[0041] Specifically, the fixed base 511 is fixed to both sides of the frame 100 by bolts or welding, and the guide roller 512 adopts a bearing structure to achieve free rotation.
[0042] Specifically, the installation height and spacing of the guide 510 are adjustable to accommodate different plate thicknesses, and its surface can be coated with a hard alloy layer or polyurethane to enhance wear resistance. At the same time, the contact pressure is monitored by a sensor to achieve adaptive adjustment.
[0043] In some specific embodiments of this utility model, the guide roller 512 is inclined, with the horizontal distance between the upper end of the guide roller 512 and the upper pressure roller 200 being d1, and the horizontal distance between the lower end of the guide roller 512 and the upper pressure roller 200 being d2, wherein d1 < d2. By inclining the guide roller 512, a progressive constraint is formed between it and the contact surface of the sheet material. The layout, which is narrower at the top and wider at the bottom, guides the sheet material to naturally correct itself during the rolling process, thereby more effectively suppressing lateral displacement of the sheet material, reducing local stress concentration, and improving rolling accuracy and surface quality.
[0044] In some specific embodiments of this utility model, a cleaning mechanism 600 is also included. The cleaning mechanism 600 is disposed on the frame 100 and is connected to the lower pressure roller 300 and the side pressure roller 400. The cleaning mechanism 600 is used to clean the surfaces of the lower pressure roller 300 and the side pressure roller 400 to ensure processing accuracy.
[0045] In some specific embodiments of this utility model, the cleaning mechanism 600 includes two cleaning rollers 610. The cleaning rollers 610 are movably mounted on the frame 100 and are rotatably connected to the frame 100. Each side pressure roller 400 and the lower pressure roller 300 are respectively provided with a cleaning roller 610. The cleaning roller 610 is located on the vertical line between the lower pressure roller 300 and the side pressure roller 400 and is located below the lower pressure roller 300 and the side pressure roller 400. The cleaning roller 610 and the lower pressure roller 300 extend in the same direction. The outer wall of the cleaning roller 610 is evenly provided with cleaning brushes 611, which are used to brush the lower pressure roller 300 and the side pressure roller 400.
[0046] like Figure 3 and Figure 4 As shown, a cleaning roller 610 is provided between adjacent side pressure rollers 400 and lower pressure rollers 300. The cleaning roller 610 is located below the side pressure rollers 400 and lower pressure rollers 300 and on their vertical lines. The outer wall of the cleaning roller 610 is equipped with cleaning brushes 611, which are configured to simultaneously abut against both the side pressure rollers 400 and lower pressure rollers 300 to clean their outer walls. Thus, the cleaning roller 610, positioned below the vertical lines of the lower pressure rollers 300 and side pressure rollers 400, removes adhering substances through mechanical brushing by rotating the brushes and contacting the roller surface. This effectively removes residual metal debris, oil, or oxides, maintaining the smoothness of the roller surface and ensuring the forming accuracy and surface quality of the sheet metal. Furthermore, the adjustable design allows for adjustment of the contact pressure according to different roller diameters and cleaning requirements, achieving full coverage of the cleaning range and avoiding cleaning dead zones.
[0047] In some specific embodiments of this utility model, the cleaning roller 610 has a plurality of water outlet holes 612, which are evenly distributed on the wall surface of the cleaning roller 610, and the interior of the cleaning roller 610 communicates with the outside through the plurality of water outlet holes 612. Figure 4 As shown, the cleaning roller 610 is hollow inside, and the water outlet holes 612 are evenly arranged along the circumference and axial direction of the cleaning roller 610. By setting the water outlet holes 612 evenly distributed on the outer wall of the cleaning roller 610, water or cleaning agent and other cleaning liquids are sprayed out simultaneously during the rotation and brushing process, thereby improving the cleaning effect on the surface of the side pressure roller 400 and the lower pressure roller 300 and extending the service life of the equipment.
[0048] In some specific embodiments of this utility model, the cleaning mechanism 600 further includes: a drive assembly 620, which is mounted on the frame 100 and is connected to two cleaning rollers 610 respectively. The drive assembly 620 is used to drive the cleaning rollers 610 to rise and fall; and a water supply assembly 630, which is mounted on the frame 100 and is connected to the two cleaning rollers 610 respectively. The water supply assembly 630 is used to supply cleaning water to the interior of the cleaning rollers 610.
[0049] Specifically, the drive assembly 620 uses a servo motor in conjunction with a lead screw assembly to achieve millimeter-level lifting accuracy.
[0050] The servo motor and lead screw assembly are both mounted on the frame 100. The servo motor and lead screw assembly are commonly used moving mechanisms, and will not be described in detail here.
[0051] Specifically, the water supply assembly 630 includes a water pump, a piping system, a filter, and a flow control valve. The water pump delivers cleaning water through the piping system, which contains a filter to remove impurities. The flow control valve allows for precise regulation of the cleaning water flow. The water pump is connected to the cleaning roller 610 via a rotary joint, forming a closed-loop controllable water supply system. Thus, the water pump continuously delivers cleaning water into the cleaning roller 610 through the piping system. The cleaning water is evenly sprayed through the outlet holes 612, and combined with the lifting and lowering action of the drive assembly 620, achieves comprehensive roller cleaning.
[0052] Specifically, the cleaning roller 610 is driven to rotate by a motor, and the cleaning brush 611 is made of wear-resistant nylon or steel wire and is arranged in a spiral shape to enhance the cleaning effect.
[0053] In some specific embodiments of this utility model, a water collection trough 110 is provided on the frame 100. The water collection trough 110 is located below the lower pressure roller 300 and the side pressure roller 400. The water collection trough 110 has a drain outlet 120 and is used to collect and discharge cleaning water. Figure 3 As shown, a water collection tank 110 is provided on the frame 100. The water collection tank 110 is located below the side pressure roller 400 and the lower pressure roller 300. By setting the water collection tank 110 with a drain outlet 120 below the frame 100, the wastewater sprayed during the cleaning process and the metal debris, oil stains and other impurities washed down can be effectively collected, realizing the centralized recycling and discharge of cleaning water, avoiding sewage overflow and pollution of the working environment, and also facilitating subsequent water treatment and recycling.
[0054] Furthermore, the bottom of the water collection tank 110 has a slope, such as... Figure 3As shown, the bottom of the water collection tank 110 is inclined to the rear and downward, and the drain outlet 120 is reasonably arranged on the lower side of the water collection tank 110. In this way, the principle of gravity flow is used to realize the efficient collection and rapid discharge of wastewater, avoid the accumulation of impurities in the sewage and the blockage of the tank, and improve the cleaning efficiency.
[0055] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A plate rolling machine with a tapered guide function, characterized in that, include: Rack (100); An upper pressure roller (200) is rotatably mounted on the frame (100); A lower pressure roller (300) is movably mounted on the frame (100). The lower pressure roller (300) is located directly below the upper pressure roller (200), and the lower pressure roller (300) extends in the same direction as the upper pressure roller (200). Two side pressure rollers (400) are movably mounted on the frame (100) and are symmetrically arranged on opposite sides of the lower pressure roller (300). A guiding mechanism (500) is provided on the frame (100). The guiding mechanism (500) is located on one side of the end of the upper pressure roller (200). The guiding mechanism (500) is used to prevent the sheet metal from deviating towards the frame (100) during the tapering operation.
2. The plate rolling machine with tapered guiding function according to claim 1, characterized in that, Also includes: The displacement mechanism is connected to the lower pressure roller (300) and the side pressure roller (400) respectively. The displacement mechanism is used to drive the lower pressure roller (300) and the side pressure roller (400) to cooperate with the upper pressure roller (200) to clamp the plate, so as to adjust the curvature of the plate. A rotating mechanism is connected to the upper pressure roller (200), the lower pressure roller (300), and the side pressure roller (400) respectively. The rotating mechanism is used to provide rotational power to the upper pressure roller (200), the lower pressure roller (300), and the side pressure roller (400).
3. The plate rolling machine with tapered guiding function according to claim 1, characterized in that, The guiding mechanism (500) includes two guide members (510), which are disposed on the frame (100). The two guide members (510) are disposed near the ends of the upper pressure roller (200) and are symmetrically disposed on opposite sides of the upper pressure roller (200).
4. The plate rolling machine with tapered guiding function according to claim 3, characterized in that, The guide (510) includes two fixed seats (511) and a guide roller (512) disposed between the two fixed seats (511). Both fixed seats (511) are disposed on the frame (100). The guide roller (512) is configured to abut against the sheet being rolled to prevent the sheet from shifting toward the frame (100).
5. The plate rolling machine with tapered guiding function according to claim 4, characterized in that, The guide roller (512) is inclined, the horizontal distance between the upper end of the guide roller (512) and the upper pressure roller (200) is d1, and the horizontal distance between the lower end of the guide roller (512) and the upper pressure roller (200) is d2, wherein d1 < d2.
6. The plate rolling machine with tapered guiding function according to claim 1, characterized in that, It also includes a cleaning mechanism (600), which is disposed on the frame (100). The cleaning mechanism (600) is connected to the lower pressure roller (300) and the side pressure roller (400). The cleaning mechanism (600) is used to clean the surfaces of the lower pressure roller (300) and the side pressure roller (400) to ensure processing accuracy.
7. The plate rolling machine with tapered guiding function according to claim 6, characterized in that, The cleaning mechanism (600) includes two cleaning rollers (610), which are vertically and rotatably mounted on the frame (100). The cleaning rollers (610) are rotatably connected to the frame (100). Each side pressure roller (400) and the lower pressure roller (300) are respectively provided with a cleaning roller (610). The cleaning roller (610) is located on the vertical line between the lower pressure roller (300) and the side pressure roller (400). The cleaning roller (610) is located below the lower pressure roller (300) and the side pressure roller (400). The cleaning roller (610) and the lower pressure roller (300) extend in the same direction. The outer wall of the cleaning roller (610) is evenly provided with cleaning brushes (611), which are used to brush the lower pressure roller (300) and the side pressure roller (400).
8. The plate rolling machine with tapered guiding function according to claim 7, characterized in that, The cleaning roller (610) has a plurality of water outlet holes (612), which are evenly distributed on the wall surface of the cleaning roller (610). The interior of the cleaning roller (610) is connected to the outside through the plurality of water outlet holes (612).
9. The plate rolling machine with tapered guiding function according to claim 8, characterized in that, The cleaning mechanism (600) also includes: A drive assembly (620) is disposed on the frame (100) and is connected to the two cleaning rollers (610) respectively. The drive assembly (620) is used to drive the cleaning rollers (610) to rise and fall. A water supply assembly (630) is disposed on the frame (100) and is connected to two cleaning rollers (610) respectively. The water supply assembly (630) is used to supply cleaning water to the interior of the cleaning rollers (610).
10. The plate rolling machine with tapered guiding function according to claim 9, characterized in that, The frame (100) is provided with a water collection tank (110), which is located below the lower pressure roller (300) and the side pressure roller (400). The water collection tank (110) has a drain outlet (120) and is used to collect and discharge clean water.