A printing machine paperboard pre-press dust removal device

Abstract

The utility model provides a printing machine paperboard pre -press dust removal equipment belongs to dust removal technical field. Including water tank, the water tank upside front and rear both ends fixedly connected with support plate, the support plate upside of water tank upside front end fixedly connected with front side plate, the upside rear end fixedly connected with rear side plate of water tank, the left and right ends above water tank are equipped with conveying mechanism, the outer end of water tank is provided with dust removal mechanism. The utility model discloses a dust removal mechanism is set up, when rotating the rotating handle makes two screw rods rotate together, can drive two adjusting plates to be located on the opposite sides of the outer side of screw rod and spacing rod and move, and then drive two brush cylinders of rear end to move oppositely, so as to be convenient for when the bristle of brush cylinder outer end produces abrasion and becomes short, moves two brush cylinders of upper and lower both ends close to each other, and then make the short bristle still can contact the upper and lower sides of paperboard, and the surface is dusted.

Description

Technical Field

[0001] This utility model relates to the field of dust removal technology, and in particular to a pre-press dust removal device for printing press cardboard. Background Technology

[0002] Paperboard, also known as cardboard, is a thick sheet of paper made from various pulps, composed of interwoven fibers. Some paperboard may also contain non-plant fibers. It is made by forming paper on a paperboard machine. The difference between paperboard and paper is usually distinguished by basis weight and thickness. Paperboard needs to be printed. If there is a lot of dust on the paperboard, it will affect the printing quality of the carton. Therefore, the paperboard needs to be dusted before printing.

[0003] However, the brushes in existing dust removal devices will wear down after prolonged use, and the worn brushes will no longer have a dust removal function. Therefore, this application provides a pre-press dust removal device for printing press cardboard to meet the needs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a pre-press dust removal device for printing press cardboard to solve the problem that the brushes in the existing dust removal devices will wear down after long-term use, and the worn brushes will lose their dust removal function.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A pre-press dust removal device for printing press cardboard includes a water tank. Support plates are fixedly connected to the front and rear ends of the upper side of the water tank. A front side plate is fixedly connected to the upper side of the support plate at the front end of the upper side of the water tank. A rear side plate is fixedly connected to the rear end of the upper side of the water tank. Conveying mechanisms are installed at the left and right ends above the water tank. A dust removal mechanism is provided at the outer end of the water tank. The dust removal mechanism includes a bearing connected inside the front side plate. Threaded rods are symmetrically fixedly connected to the upper and lower ends of the inner side of the bearing. A rotating handle is fixedly connected to the upper side of the threaded rod at the upper end of the bearing. A limit rod is connected inside the front side plate. An adjusting plate is connected to the outer side of the threaded rod. A first motor is installed at the front of the adjusting plate. A rectangular shaft is fixedly connected to the rear end of the output shaft of the first motor. A round rod is fixedly connected to the rear side of the rectangular shaft. A brush roller is slidably connected to the outer side of the rectangular shaft. A rear connecting plate is connected inside the rear side plate. An insert rod is connected inside the rear connecting plate. Dust suction units are provided at the outer ends of the front and rear side plates.

[0007] Optionally, the vacuuming unit includes an upper cover fixedly connected to the middle position of the upper end of an adjacent side of the front and rear side panels, a lower cover fixedly connected to the middle position of the lower end of an adjacent side of the front and rear side panels, an upper air pump installed at the upper rear end of the upper cover, a first air inlet pipe installed at the front end of the upper air pump, a first exhaust pipe installed at the rear end of the upper air pump, a lower air pump installed at the lower front end of the lower cover, a second air inlet pipe installed at the rear end of the lower air pump, a second exhaust pipe installed at the front end of the lower air pump, and an air outlet pipe fixedly connected to the right side of the front end of the water tank.

[0008] Optionally, the conveying mechanism includes an upper rotating shaft connected to the upper left and right ends inside the front and rear side plates, a lower rotating shaft connected to the lower left and right ends inside the front and rear side plates, a drive gear fixedly connected to the outer rear end of the upper rotating shaft, a driven gear fixedly connected to the outer rear end of the lower rotating shaft, a second motor installed at the upper left and right ends of the front side of the front side plate, and a conveying shaft fixedly connected to the outer sides of the upper and lower rotating shafts.

[0009] Optionally, through slots are provided at the upper and lower ends of the middle position inside the front side plate and the rear side plate, the left and right sides of the rear connecting plate are slidably connected to the left and right sides of the through slot inside the rear side plate, insertion holes are provided at the left and right ends of the through slot inside the rear side plate, and sliding holes are provided at the left and right ends of the rear connecting plate.

[0010] Optionally, a rotating hole is provided in the middle of the rear connecting plate, the right end of the output shaft of the first motor is fixedly connected to the front end of the rectangular shaft, the outer side of the round rod is rotatably connected to the inner side of the rotating hole, the front side of the brush roller is slidably connected to the rear side of the front side plate, and the rear side of the brush roller is slidably connected to the front side of the rear side plate.

[0011] Optionally, the bearing is installed inside the front side plate at the right side between the two through slots. The right end of the adjusting plate has a threaded hole, and the left end of the adjusting plate has a limit hole. The outer side of the threaded rod is threaded to the inner side of the threaded hole, and the outer side of the limit rod is slidably connected to the inner side of the limit hole.

[0012] Optionally, circular holes are provided at the upper and lower ends of the left and right sides inside the front and rear side plates, the outer sides of the front and rear ends of the upper and lower rotating shafts are rotatably connected to the inner sides of the circular holes, and the front and rear sides of the conveying shaft are slidably connected to the side adjacent to the front and rear side plates.

[0013] Optionally, the rear end of the output shaft of the second motor is fixedly connected to the front end of the upper rotating shaft, and the upper rotating shaft meshes with the driven gear.

[0014] Optionally, the outer side of the conveying shaft is rotatably connected to the upper and lower sides of the cardboard to be conveyed.

[0015] Optionally, the end of the first air inlet pipe away from the upper air pump is fixedly connected to the upper end of the upper cover, the end of the first exhaust pipe away from the upper air pump is fixedly connected to the lower rear end of the water tank, the end of the second air inlet pipe away from the lower air pump is fixedly connected to the lower end of the lower cover, and the end of the second exhaust pipe away from the lower air pump is fixedly connected to the lower front end of the water tank, wherein the water tank is filled with water.

[0016] Compared with the prior art, this utility model has at least the following beneficial effects:

[0017] In the above solution, by setting up a dust removal mechanism, when the rotating handle is turned so that the two threaded rods rotate together, the two adjusting plates can be moved relative to each other outside the threaded rods and the limiting rods, thereby causing the two brush rollers at the rear end to move relative to each other. This allows the two brush rollers at the upper and lower ends to move closer to each other when the bristles at the outer end of the brush rollers are worn and shortened, so that the shortened bristles can still contact the upper and lower sides of the cardboard and remove dust from its surface.

[0018] By setting up a dust removal mechanism, the insert rod inside the rear side plate can be pulled upwards and removed from the sliding hole, so that the rear connecting plate is no longer fixed to the through groove inside the rear side plate. Then, the rear connecting plate can be removed from the through groove inside the rear side plate, so that the rear side of the brush roller is no longer restricted. This allows the brush roller at the outer end of the rectangular shaft to be replaced when the brush roller is damaged.

[0019] By setting up a dust collection unit, when the brush rollers rotate to remove dust from the cardboard passing between the two brush rollers, the dust generated is sucked in by the activated upper and lower air pumps and then enters the lower part of the water tank through the first and second exhaust pipes. Subsequently, bubbles are formed in the water inside the tank and float upwards. During the floating process, the dust in the bubbles is sucked into the water, and the air is discharged from the upper exhaust pipe, which plays a role in cleaning the dust and preventing the dust from flying around the equipment and affecting the nearby working environment. Attached Figure Description

[0020] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0021] Figure 1 A three-dimensional structural diagram of a pre-press dust removal device for printing press cardboard.

[0022] Figure 2 A schematic diagram of the conveying mechanism of a pre-press dust removal device for printing press cardboard.

[0023] Figure 3A schematic diagram of the structure above the middle position of the water tank in the pre-press dust removal equipment for printing press cardboard.

[0024] Figure 4 This is a schematic diagram of the dust removal mechanism in a pre-press dust removal system for printing press cardboard.

[0025] Figure label:

[0026] 1. Water tank; 2. Support plate; 3. Front side plate; 4. Rear side plate; 501. Bearing; 502. Threaded rod; 503. Rotary handle; 504. Limiting rod; 505. Adjusting plate; 506. First motor; 507. Rectangular shaft; 508. Round rod; 509. Brush roller; 510. Rear connecting plate; 511. Insert rod; 601. Upper air pump; 602. First air inlet pipe; 603. First exhaust pipe; 604. Lower air pump; 605. Second air inlet pipe; 606. Second exhaust pipe; 607. Upper protective cover; 608. Lower protective cover; 609. Air outlet pipe; 701. Upper rotating shaft; 702. Lower rotating shaft; 703. Drive gear; 704. Driven gear; 705. Second motor; 706. Conveyor shaft.

[0027] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0028] The following is a detailed description of a pre-press dust removal device for printing press cardboard provided by this utility model, in conjunction with the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0029] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0030] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0031] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0032] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0033] like Figure 1 and Figure 2As shown, an embodiment of this utility model provides a pre-press dust removal device for printing press cardboard, including a water tank 1. Support plates 2 are fixedly connected to the front and rear ends of the upper side of the water tank 1. A front side plate 3 is fixedly connected to the upper front end of the support plate 2. A rear side plate 4 is fixedly connected to the upper rear end of the water tank 1. Conveying mechanisms are installed at the left and right ends above the water tank 1. The conveying mechanisms include an upper rotating shaft 701 connected to the upper left and right ends inside the front side plate 3 and the rear side plate 4. A lower rotating shaft 702 is connected to the lower left and right ends inside the front side plate 3 and the rear side plate 4. A drive gear 703 is fixedly connected to the outer rear end of the upper rotating shaft 701. A driven gear 704 is fixedly connected to the outer rear end of the lower rotating shaft 702. A second motor 705 is installed at the left and right ends above the front side of the front side plate 3. The rear end of the output shaft of the second motor 705 is fixedly connected to the front end of the upper rotating shaft 701. 701 meshes with the driven gear 704. The outer sides of the upper rotating shaft 701 and the lower rotating shaft 702 are fixedly connected to the conveying shaft 706. The upper and lower ends of the left and right sides of the front side plate 3 and the rear side plate 4 are provided with round holes. The outer sides of the front and rear ends of the upper rotating shaft 701 and the lower rotating shaft 702 are rotatably connected to the inner side of the round holes. The front and rear sides of the conveying shaft 706 are slidably connected to the side adjacent to the front side plate 3 and the rear side plate 4. The outer side of the conveying shaft 706 is tumbledly connected to the upper and lower sides of the cardboard to be conveyed. When the second motor 705 is started, the upper rotating shaft 701 at its rear end rotates, which drives the driving gear 703 to rotate, causing the driven gear 704 to rotate, thereby causing the lower rotating shaft 702 to rotate relative to the upper rotating shaft 701. At the same time, the conveying shaft 706 at the outer end of the upper rotating shaft 701 and the lower rotating shaft 702 rotate relative to each other, thus conveying the cardboard between the two conveying shafts 706.

[0034] like Figures 3 to 4As shown, a dust removal mechanism is provided at the outer end of the water tank 1. The dust removal mechanism includes a bearing 501 connected inside the front side plate 3. Threaded rods 502 are symmetrically fixedly connected to the upper and lower ends of the inner side of the bearing 501. A rotating handle 503 is fixedly connected to the upper side of the threaded rod 502 at the upper end of the bearing 501. A limit rod 504 is connected inside the front side plate 3. An adjusting plate 505 is connected to the outer side of the threaded rod 502. A first motor 506 is installed on the front side of the adjusting plate 505. A rectangular shaft 507 is fixedly connected to the rear end of the output shaft of the first motor 506. A round rod 508 is fixedly connected to the rear side of the rectangular shaft 507. A brush roller 509 is slidably connected to the outer side of the rectangular shaft 507. A rear connecting plate 510 is connected inside the rear side plate 4. The internal connection includes a plug rod 511. Through slots are provided at the upper and lower ends of the middle position inside the front side plate 3 and the rear side plate 4. The left and right sides of the rear connecting plate 510 are slidably connected to the left and right sides of the through slot inside the rear side plate 4. Insertion holes are provided at the left and right ends of the through slot inside the rear side plate 4. Sliding holes are provided at the left and right ends of the rear connecting plate 510. By pulling the plug rod 511 inside the rear side plate 4 upward and moving it out of the sliding hole, the rear connecting plate 510 is no longer fixed to the through slot inside the rear side plate 4. Then, the rear connecting plate 510 can be removed from the through slot inside the rear side plate 4, so that the rear side of the brush roller 509 is no longer restricted. When the brush roller 509 is damaged, the brush roller 509 at the outer end of the rectangular shaft 507 can be replaced.

[0035] A rotating hole is provided in the middle of the rear connecting plate 510. The right end of the output shaft of the first motor 506 is fixedly connected to the front end of the rectangular shaft 507. The outer side of the round rod 508 is rotatably connected to the inner side of the rotating hole. The front side of the brush roller 509 is slidably connected to the rear side of the front side plate 3, and the rear side of the brush roller 509 is slidably connected to the front side of the rear side plate 4. The bearing 501 is installed in the front side plate 3 at the right side between the two through slots. A threaded hole is provided in the right end of the adjusting plate 505, and a limit hole is provided in the left end of the adjusting plate 505. The outer side of the threaded rod 502 is connected to the threaded... The inner side of the hole is threaded, and the outer side of the limiting rod 504 is slidably connected to the inner side of the limiting hole. When the rotating handle 503 is rotated so that the two threaded rods 502 rotate together, the two adjusting plates 505 can be moved relative to each other on the outer side of the threaded rods 502 and the limiting rod 504, thereby causing the two brush rollers 509 at the rear end to move relative to each other. This is so that when the bristles at the outer end of the brush rollers 509 are worn and shortened, the two brush rollers 509 at the upper and lower ends can be moved closer to each other, so that the shortened bristles can still contact the upper and lower sides of the cardboard to remove dust from its surface.

[0036] A dust collection unit is provided at the outer end of the front side panel 3 and the rear side panel 4. The dust collection unit includes an upper cover 607 fixedly connected to the middle position of the upper end of the adjacent side of the front side panel 3 and the rear side panel 4, and a lower cover 608 fixedly connected to the middle position of the lower end of the adjacent side of the front side panel 3 and the rear side panel 4. An upper air pump 601 is installed at the upper rear end of the upper cover 607. A first air inlet pipe 602 is installed at the front end of the upper air pump 601, and a first exhaust pipe 603 is installed at the rear end of the upper air pump 601. A lower air pump 604 is installed at the lower front end of the lower cover 608. A second air inlet pipe 605 is installed at the rear end of the lower air pump 604, and a second exhaust pipe 606 is installed at the front end of the lower air pump 604. An air outlet pipe 609 is fixedly connected to the right side of the front end of the water tank 1. The end of the first air inlet pipe 602 away from the upper air pump 601 is fixedly connected to the upper end of the upper cover 607, and the first exhaust pipe 603 away from the upper air pump... One end of 601 is fixedly connected to the lower rear end of water tank 1. The end of the second air inlet pipe 605 away from the lower air pump 604 is fixedly connected to the lower end of the lower cover 608. The end of the second exhaust pipe 606 away from the lower air pump 604 is fixedly connected to the lower front end of water tank 1. Water tank 1 is filled with water. When the brush roller 509 rotates to remove dust from the cardboard between the two brush rollers 509, the dust generated will be sucked in by the activated upper air pump 601 and lower air pump 604 and then enter the lower end of the interior of water tank 1 through the first exhaust pipe 603 and the second exhaust pipe 606. Then, bubbles will form in the water inside water tank 1 and float upward. During the floating process, the dust in the bubbles will be sucked into the water, and the air will be discharged from the upper exhaust pipe 609, which plays a role in cleaning the dust and preventing the dust from flying around the equipment and affecting the nearby working environment during the dust removal process.

[0037] The working principle of the technical solution provided by this utility model is as follows: When removing dust from the cardboard, the first motor 506, the second motor 705, the upper air pump 601, and the lower air pump 604 are started. Then, the cardboard to be printed is input between the relatively rotating conveyor shafts 706 and then conveyed to the right by the relatively rotating conveyor shafts 706 until it passes between the upper guard 607 and the lower guard 608. At the same time, the dust on its surface is cleaned by the relatively rotating brush roller 509. At the same time, the cleaned dust is put into the first air inlet pipe 602 and the second air inlet pipe 605, and then enters the water tank 1 from the first exhaust pipe 603 and the second exhaust pipe 606 to form bubbles. At the same time, the dust in the bubbles is sucked into the water in the water tank 1, and the air is discharged from the upper exhaust pipe 609. Finally, the cardboard with the surface dust removed is output from the right end of the conveyor shafts 706 to the printing machine for printing.

[0038] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pre-press dust removal device for printing press cardboard, characterized in that, The device includes a water tank, with support plates fixedly connected to the front and rear ends of the upper side of the water tank. A front side plate is fixedly connected to the upper side of the support plate at the front end of the upper side of the water tank, and a rear side plate is fixedly connected to the rear end of the upper side of the water tank. Conveying mechanisms are installed at the left and right ends above the water tank. A dust removal mechanism is provided at the outer end of the water tank, and the dust removal mechanism includes a bearing connected inside the front side plate. Threaded rods are symmetrically fixedly connected to the upper and lower ends of the inner side of the bearing. A rotating handle is fixedly connected to the upper side of the threaded rod at the upper end of the bearing. A limit rod is connected inside the front side plate, and an adjusting plate is connected to the outer side of the threaded rod. A first motor is installed at the front of the adjusting plate. A rectangular shaft is fixedly connected to the rear end of the output shaft of the first motor. A round rod is fixedly connected to the rear side of the rectangular shaft. A brush roller is slidably connected to the outer side of the rectangular shaft. A rear connecting plate is connected inside the rear side plate, and an insert rod is connected inside the rear connecting plate. A dust collection unit is provided at the outer ends of the front and rear side plates.

2. The pre-press dust removal equipment for printing press cardboard according to claim 1, characterized in that, The dust collection unit includes an upper cover fixedly connected to the middle position of the upper end of an adjacent side of the front and rear side panels, and a lower cover fixedly connected to the middle position of the lower end of an adjacent side of the front and rear side panels. An upper air pump is installed at the upper rear end of the upper cover, a first air inlet pipe is installed at the front end of the upper air pump, and a first exhaust pipe is installed at the rear end of the upper air pump. A lower air pump is installed at the lower front end of the lower cover, a second air inlet pipe is installed at the rear end of the lower air pump, and a second exhaust pipe is installed at the front end of the lower air pump. An air outlet pipe is fixedly connected to the right front end of the water tank.

3. The pre-press dust removal equipment for printing press cardboard according to claim 1, characterized in that, The conveying mechanism includes an upper rotating shaft connected to the upper left and right ends inside the front and rear side plates, and a lower rotating shaft connected to the lower left and right ends inside the front and rear side plates. A drive gear is fixedly connected to the outer rear end of the upper rotating shaft, and a driven gear is fixedly connected to the outer rear end of the lower rotating shaft. A second motor is installed at the upper left and right ends of the front side of the front side plate, and a conveying shaft is fixedly connected to the outer sides of the upper and lower rotating shafts.

4. The pre-press dust removal equipment for printing press cardboard according to claim 1, characterized in that, The front and rear side panels have through slots at the top and bottom of the middle position inside. The left and right sides of the rear connecting plate are slidably connected to the left and right sides of the through slot inside the rear side panel. The left and right sides of the rear side panel located in the through slot have insertion holes. The left and right sides of the rear connecting plate have sliding holes.

5. The pre-press dust removal equipment for printing press cardboard according to claim 1, characterized in that, A rotating hole is provided in the middle of the interior of the rear connecting plate. The right end of the output shaft of the first motor is fixedly connected to the front end of the rectangular shaft. The outer side of the round rod is rotatably connected to the inner side of the rotating hole. The front side of the brush roller is slidably connected to the rear side of the front side plate, and the rear side of the brush roller is slidably connected to the front side of the rear side plate.

6. The pre-press dust removal equipment for printing press cardboard according to claim 1, characterized in that, The bearing is installed inside the front side plate on the right side between the two through slots. The right end of the adjusting plate has a threaded hole, and the left end of the adjusting plate has a limit hole. The outer side of the threaded rod is threaded to the inner side of the threaded hole, and the outer side of the limit rod is slidably connected to the inner side of the limit hole.

7. The pre-press dust removal equipment for printing press cardboard according to claim 3, characterized in that, The front and rear side plates have circular holes at their upper and lower ends on the left and right sides. The outer sides of the front and rear ends of the upper and lower rotating shafts are rotatably connected to the inner sides of the circular holes. The front and rear sides of the conveying shaft are slidably connected to the side adjacent to the front and rear side plates.

8. The pre-press dust removal equipment for printing press cardboard according to claim 3, characterized in that, The rear end of the output shaft of the second motor is fixedly connected to the front end of the upper rotating shaft, and the upper rotating shaft meshes with the driven gear.

9. The pre-press dust removal equipment for printing press cardboard according to claim 7, characterized in that, The outer side of the conveyor shaft is tumblingly connected to the upper and lower sides of the cardboard to be conveyed.

10. The pre-press dust removal equipment for printing press cardboard according to claim 2, characterized in that, The end of the first air inlet pipe away from the upper air pump is fixedly connected to the upper end of the upper protective cover. The end of the first exhaust pipe away from the upper air pump is fixedly connected to the lower rear end of the water tank. The end of the second air inlet pipe away from the lower air pump is fixedly connected to the lower end of the lower protective cover. The end of the second exhaust pipe away from the lower air pump is fixedly connected to the lower front end of the water tank. The water tank is filled with water.

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