A device for detecting the bonding strength of corrugated paper

Abstract

The application discloses a kind of detection devices of corrugated paper bonding strength, it is related to corrugated paper processing technical field, including detector, the lower end of detector is fixedly connected with base, the lateral wall of base is fixedly connected with bottom plate, the upper end of bottom plate is fixedly connected with vertical column.In the application, when the air pump works, the suction hole can generate suction force, so that the sample can be fixed, and the device can further fix the sample to meet the needs of later operation. Meanwhile, when the air pump works, the staff can choose different modes according to the actual situation of the sample, and the corresponding first electromagnetic valve can be opened to insert the fixing needle into the sample. The device can further facilitate the insertion of the fixing needle into the sample, which avoids the staff inserting the fixing needle into the sample and prevents the sample from being damaged. Furthermore, the staff's workload is reduced, and the work efficiency is indirectly improved.

Description

Technical Field

[0001] This invention relates to the field of corrugated paper processing technology, and more specifically, to a device for testing the bonding strength of corrugated paper. Background Technology

[0002] The adhesive strength tester is mainly used to determine the physical properties of paperboard, such as ring crush strength, edge crush strength, adhesive peel strength, corrugated core flat crush strength, and flat crush strength of single-faced single-layer corrugated paperboard. It is an indispensable and important testing instrument for paperboard and corrugated paperboard manufacturers, as well as relevant scientific research institutions and testing organizations.

[0003] In practice, when testing the bonding strength of corrugated paper, staff use a bonding strength tester to meet their testing needs. However, using this tester requires pre-processing the samples. First, the samples need to be cut to appropriate sizes. Then, fixing pins of different lengths are inserted into the samples, and the samples are placed on a sample support. During this process, the shorter fixing pins must not contact the sample support. Then, staff select different sample covers based on their experience and the actual situation. Only after the samples are prepared can they be placed into the bonding strength tester for testing. However, the above preparation process is too complicated and can easily damage the samples during operation, further affecting the accuracy of the sample testing and reducing the efficiency of the staff.

[0004] Therefore, we propose a device for testing the bonding strength of corrugated paper to solve the above problems. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a device for detecting the bonding strength of corrugated paper to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for testing the bonding strength of corrugated paper, comprising a tester, a base fixedly connected to the lower end of the tester, a base plate fixedly connected to the side wall of the base, and a vertical column fixedly connected to the upper end of the base plate;

[0007] The upper end of the vertical column is connected to a placement component; two support columns are fixedly connected to the side wall of the vertical column, and one end of each of the two support columns is connected to a pin assembly.

[0008] Each of the two pin assemblies is connected to a pushing component, one end of each of the two pushing components is connected to the side wall of the support column, each of the two pushing components is connected to a diversion component, and each of the two pin assemblies is connected to a moving component.

[0009] A support component is connected to the base plate, and the support component is located on the side where the component is placed.

[0010] The detector is connected to a detection component, which is connected to multiple lifting components. A placement base is fixedly connected to the detector, and an air supply component is connected to the placement base.

[0011] In this device, when the air pump is working, it generates suction at the suction port, thereby fixing the sample. This further secures the sample, meeting the needs of subsequent operations. Simultaneously, when the air pump is operating, the operator can select different modes based on the sample's condition, opening the corresponding first solenoid valve to insert the fixing pin into the sample. This facilitates the insertion of the fixing pin into the sample, avoiding manual insertion and sample damage, thus reducing operator workload and indirectly improving efficiency.

[0012] In a preferred embodiment, the placement assembly includes a fixing plate fixedly connected to the upper end of the vertical column, the fixing plate having a plurality of air intake holes, and the air intake end of the fixing plate being fixedly connected to a first air intake pipe.

[0013] In a preferred embodiment, the pin assembly includes a socket connected to the upper end of a support post, the socket having multiple insertion holes on its side wall, rubber plugs fixedly connected to the side wall of the socket, with the multiple rubber plugs located on one side of the multiple insertion holes respectively, and multiple connecting rods connected to the socket.

[0014] In a preferred embodiment, the pushing assembly includes a fixed plate fixedly connected to one end of a plurality of connecting rods, a plurality of push columns fixedly connected to the fixed plate, each of the plurality of push columns having a push rod inserted therein, and a support rod fixedly connected to the fixed plate, one end of the support rod being connected to the side wall of the support column.

[0015] In a preferred embodiment, the diversion assembly includes connecting pipes fixedly connected to one end of multiple push rods, each of the multiple connecting pipes being provided with a first solenoid valve, and one end of the multiple connecting pipes being fixedly connected to the same diversion plate, the air inlet end of the diversion plate being fixedly connected to an air inlet pipe.

[0016] In a preferred embodiment, the moving component includes a first electric slide rail fixedly connected to multiple connecting rods, a first electric slider slidably connected to the first electric slide rail, an electric telescopic rod fixedly connected to the first electric slider, a lifting rod fixedly connected to the electric telescopic rod, an adsorption plate fixedly connected to one end of the lifting rod, multiple first air intakes fixedly connected to the air intake end of the adsorption plate, and a second air intake pipe fixedly connected to the adsorption plate.

[0017] In a preferred embodiment, the supporting component includes a second electric slide rail fixedly connected to the base plate, a matching second electric slider slidably connected to the second electric slide rail, a vertical rod fixedly connected to the second electric slider, a placement plate fixedly connected to the upper end of the vertical rod, and a magnetic plate fixedly connected to the placement plate.

[0018] In a preferred embodiment, the detection assembly includes a horizontal plate fixedly connected to the detector, a bending rod fixedly connected to the horizontal plate, a mounting plate fixedly connected to one end of the bending rod, and a detection head fixedly connected to the mounting plate.

[0019] In a preferred embodiment, the lifting assembly includes a hydraulic rod that passes through the horizontal plate, a vertical pipe that is fixedly connected to the lower end of the hydraulic rod, a third suction pipe that is fixedly connected to the side wall of the vertical pipe, a second solenoid valve that is provided on the third suction pipe, and a second suction head that is fixedly connected to the lower end of the vertical pipe.

[0020] In a preferred embodiment, the air supply assembly includes an air pump fixedly connected to the placement base. The input and output ends of the air pump are both fixedly connected to a first pipe. A second pipe is fixedly connected to each of the two first pipes. A third solenoid valve is provided on each of the two second pipes. Multiple third pipes are connected to each of the two first pipes.

[0021] The technical effects and advantages of this invention are as follows:

[0022] 1. When the air pump is working, it generates suction at the suction port, which fixes the sample and allows the device to secure it, meeting the needs of subsequent operations. Simultaneously, when the air pump is working, the operator can select different modes based on the sample's condition, opening the corresponding first solenoid valve to insert the fixing pin into the sample. This facilitates the insertion of the fixing pin into the sample, avoiding manual insertion and sample damage, thus reducing operator workload and indirectly improving efficiency.

[0023] 2. When the electric telescopic rod is working, the adsorption plate can come into contact with the sample. When the air pump is working, the sample can be adsorbed. When the electric telescopic rod and the first electric slide rail are working, the sample can be moved to the sample support, making it easier for the staff to place the sample on the sample support, thus avoiding multiple adjustments by the staff, further facilitating the staff's work, and indirectly improving the staff's work efficiency.

[0024] 3. When the detection head and the second electric slide rail are working, the device can easily select different sample covers. After the second electric slider moves to the appropriate position, the sample cover on the second suction head can cover the sample, thus completing the sample preparation. Afterwards, the staff can directly place the sample into the detector to perform the test, further reducing the steps and time required for sample preparation and indirectly improving the staff's work efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a first-view structural diagram of the present invention;

[0027] Figure 3 This is a schematic diagram of the second perspective structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the third-view structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the first partial connection structure in this invention;

[0030] Figure 6 for Figure 5 A partially enlarged schematic diagram of the connection structure at point A in the middle;

[0031] Figure 7 for Figure 5 A partial upward-view diagram of the connecting structure;

[0032] Figure 8 This is a schematic diagram of the second partial connection structure of the present invention;

[0033] Figure 9 for Figure 8 A partially enlarged schematic diagram of the connection structure at point B;

[0034] Figure 10 This is a schematic diagram of the third partial connection structure of the present invention.

[0035] The attached diagram is labeled as follows: 1. Detector; 2. Base; 3. Base plate; 4. Vertical column; 5. Support column; 6. Placement seat; 7. Fixing plate; 8. Suction hole; 9. First suction pipe; 10. Socket; 11. Insertion hole; 12. Rubber plug; 13. Connecting rod; 14. Fixing plate; 15. Push column; 16. Push rod; 17. Connecting pipe; 18. First solenoid valve; 19. Diverter plate; 20. Inlet pipe; 21. First electric slide rail; 22. First electric slider; 23. Electric telescopic rod; 24. Lifting rod; 25. Adsorption. 26 Plate, 27 First suction head, 28 Second suction pipe, 29 Support rod, 30 Second electric slide rail, 31 Second electric slider, 32 Vertical rod, 33 Placement plate, 34 Magnetic plate, 35 Horizontal plate, 36 Bending rod, 37 Mounting plate, 38 Detection head, 39 Hydraulic rod, 40 Vertical pipe, 41 Third suction pipe, 42 Second solenoid valve, 43 Air pump, 44 First pipe, 45 Second pipe, 46 Third solenoid valve, 47 Third pipe. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Reference Figure 1-10 A device for testing the bonding strength of corrugated paper includes a testing instrument 1, wherein the testing instrument 1 is a bonding strength tester. The bonding strength tester is mainly used to determine the physical properties of paperboard such as ring crush strength, edge crush strength, adhesive peel strength, corrugated core flat crush strength, and flat crush strength of single-faced single-layer corrugated paperboard. It is an indispensable and important testing instrument for paperboard and corrugated paperboard manufacturers, as well as relevant scientific research institutions and testing organizations, further meeting the normal use needs of users.

[0038] The lower end of the detector 1 is fixedly connected to the base 2, which is U-shaped, so that the base 2 can wrap around the detector 1, thereby improving the stability of the detector 1. At the same time, a base plate 3 can be welded onto the base 2 to further meet the normal use of the base plate 3.

[0039] Meanwhile, a vertical column 4 is fixedly connected to the base plate 3, and a fixing plate 7 is fixedly connected to the top of the vertical column 4. The fixing plate 7 is provided with multiple air suction holes 8. It is particularly noteworthy that the air suction end of the fixing plate 7 is fixedly connected to a first air suction pipe 9, and one end of the first air suction pipe 9 is connected to a third pipe 47. When the air pump 43 is working, the air pump 43 will generate suction, which will cause the fixing plate 7 to generate suction, thus causing the air suction holes 8 to draw air. This makes it easier for staff to place the sample on the fixing plate 7 and fix the sample using the fixing plate 7.

[0040] Meanwhile, two support columns 5 are fixedly connected to the vertical column 4, and one end of each support column 5 is fixedly connected to a socket 10. For ease of understanding, only the connection relationship of one socket 10 will be described below. The socket 10 is provided with multiple sockets 11, and rubber plugs 12 are fixedly connected to the side wall of the socket 10. The multiple rubber plugs 12 are located on one side of the multiple sockets 11. The rubber plugs 12 can also be used to fix the pins. It is worth noting that pins of different lengths can be inserted into the two sockets 10. When the pins in the socket 10 are used up, the staff can manually insert the pins into the sockets 11 to further meet the needs of the device for the next use.

[0041] It is also worth noting that multiple connecting rods 13 are fixedly connected to the socket 10, and one end of each connecting rod 13 is fixedly connected to the same fixing plate 14. Multiple push posts 15 are fixedly connected to the fixing plate 14, and each push post 15 is fitted with a push rod 16. It is also worth noting that one end of the push rod 16 is fixedly connected to a spring, and one end of the spring is fixedly connected to the side wall of the push post 15. Furthermore, the push post 15 is equipped with a one-way valve, which allows the gas in the push post 15 to be discharged autonomously, and with the assistance of the spring, the push rod 16 can be reset autonomously.

[0042] One end of the push column 15 is fixedly connected to a connecting pipe 17, and each connecting pipe 17 is equipped with a first solenoid valve 18. At the same time, one end of multiple connecting pipes 17 is fixedly connected to the same flow divider plate 19, and the air inlet end of the flow divider plate 19 is fixedly connected to an air inlet pipe 20. One end of the air inlet pipe 20 is connected to one of the third pipes 47. It is worth noting that when the air pump 43 is working, gas can be input from one of the third pipes 47 into the air inlet pipe 20. The operator can select different modes according to the actual situation of the sample, and further open the corresponding first solenoid valve 18, so that the gas can enter the corresponding push column 15. The push rod 16 is affected by the gas, and the push rod 16 can move, so that the fixing needle can be inserted into the sample, which further facilitates the insertion of the fixing needle. It is worth noting that a support rod 28 is fixedly connected to the fixing plate 14, and one end of the support rod 28 is connected to the support column 5. The support rod 28 can support the fixing plate 14.

[0043] Meanwhile, multiple connecting rods 13 are fixedly connected to the same first electric slide rail 21, and the first electric slide rail 21 is slidably connected to a matching first electric slider 22. The first electric slider 22 is fixedly connected to an electric telescopic rod 23, and the electric telescopic rod 23 is fixedly connected to a lifting rod 24. One end of the lifting rod 24 is fixedly connected to an adsorption plate 25, and multiple first air intake heads 26 are fixed to the air intake end of the adsorption plate 25. A second air intake pipe 27 is fixedly connected to the adsorption plate 25, and one end of the second air intake pipe 27 is connected to a third pipe 47.

[0044] After the fixing pins are inserted into the sample, the operator can activate the first electric slide rail 21 via the controller. When the first electric slide rail 21 is working, the first electric slider 22 moves accordingly, which in turn moves the electric telescopic rod 23. When the electric telescopic rod 23 is working, the height of the lifting rod 24 can be adjusted, which in turn adjusts the height of the adsorption plate 25, allowing the adsorption plate 25 to come into contact with the sample. When the air pump 43 is working, the adsorption plate 25 generates suction, which in turn generates suction at the first suction head 26, allowing the sample to be adsorbed. When the electric telescopic rod 23 and the first electric slide rail 21 are working, the sample can be moved onto the placement plate 32.

[0045] Subsequently, a second electric slide rail 29 is fixedly connected to the base plate 3, and a matching second electric slider 30 is slidably connected to the second electric slide rail 29. A vertical rod 31 is fixedly connected to the second electric slider 30, and a placement plate 32 is fixedly connected to the top of the vertical rod 31. A magnetic plate 33 is fixedly connected to the placement plate 32. It is worth noting that a sample support is placed on the magnetic plate 33. When the sample is moved above the magnetic plate 33 by the adsorption plate 25, the adsorption plate 25 stops sucking air, so that the sample can be placed on the sample support, thereby completing the sample placement work. At the same time, the magnetic plate 33 can also serve to fix the sample support, further satisfying the normal use of the device.

[0046] Meanwhile, a horizontal plate 34 is fixedly connected to the detector 1, and a bending rod 35 is fixedly connected to the horizontal plate 34. One end of the bending rod 35 is fixedly connected to a mounting plate 36, and a detection head 37 is fixedly connected to the mounting plate 36. When the sample is on the sample support, the detection head 37 works accordingly. The detection head 37 is a camera, which enables the controller to know the distance between the fixed pins. Then, when the second electric slide rail 29 works, the second electric slider 30 can move accordingly, so that the sample can move accordingly. This makes it convenient for the device to select different sample covers and further meets the normal use of the device.

[0047] Meanwhile, a hydraulic rod 38 is installed through the horizontal plate 34, and a vertical pipe 39 is fixedly connected to the lower end of the hydraulic rod 38. A third suction pipe 40 is fixedly connected to the suction end of the vertical pipe 39, and a second solenoid valve 41 is installed on the third suction pipe 40. A second suction head 42 is fixedly connected to the lower end of the vertical pipe 39. It is worth noting that the output end of the third suction pipe 40 is connected to one of the third pipes 47. Therefore, when the second electric slider 30 moves to the appropriate position, the hydraulic rod 38 works accordingly, which causes the vertical pipe 39 to descend and closes the second solenoid valve 41. This allows the sample cover on the second suction head 42 to cover the sample, thus completing the sample preparation.

[0048] The upper end of the detector 1 is fixedly connected to an air pump 43. The input and output ends of the air pump 43 are both fixedly connected to first pipes 44. The two first pipes 44 are both fixedly connected to second pipes 45. The two second pipes 45 are equipped with third solenoid valves 46. It is worth noting that the two second pipes 45 can meet the normal exhaust and intake of the air pump 43, so that the air pump 43 can be used normally. It is also worth noting that multiple third pipes 47 are fixedly connected to the second pipes 44. One end of the multiple third pipes 47 is connected to the first intake pipe 9, the intake pipe 20, the second intake pipe 27 and the third intake pipe 40 respectively. When there are many pipes, a diverter pipe can be used for diversion. The user can meet the normal use of the device according to the actual situation.

[0049] In this invention, when the operator needs to use this device, the operator first cuts the sample and then places it on the fixing plate 7. At this time, the air pump 43 works, which generates suction force in the suction hole 8, thereby fixing the sample. At the same time, when the air pump 43 works, gas can be input into the air inlet pipe 20 through one of the third pipes 47. The operator can select different modes according to the actual situation of the sample, and further open the corresponding first solenoid valve 18, so that the gas can enter the corresponding push rod 15. The push rod 16 is affected by the gas, and further moves the push rod 16, thereby inserting the fixing needle into the sample, which further facilitates the device to insert the fixing needle into the sample.

[0050] When the electric telescopic rod 23 is working, the height of the lifting rod 24 can be adjusted, which in turn adjusts the height of the adsorption plate 25, allowing the adsorption plate 25 to come into contact with the sample. When the air pump 43 is working, the adsorption plate 25 generates suction, which in turn generates suction at the first suction head 26, allowing the sample to be adsorbed. When the electric telescopic rod 23 and the first electric slide rail 21 are working, the sample can be moved onto the sample support.

[0051] Then, the detection head 37, which is a camera, operates, allowing the controller to determine the distance between the fixed needles. When the second electric slide rail 29 operates, the second electric slider 30 moves accordingly, allowing the sample to move and facilitating the selection of different sample covers. After the second electric slider 30 moves to the appropriate position, the hydraulic rod 38 operates, causing the vertical tube 39 to descend and simultaneously closing the second solenoid valve 41. This allows the sample cover on the second suction head 42 to cover the sample, completing the sample preparation. The operator can then directly place the sample into the detector 1 for testing, further reducing the steps and time required for sample preparation and indirectly improving the operator's work efficiency.

[0052] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0053] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0054] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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. A device for testing the bonding strength of corrugated paper, comprising a testing instrument (1), characterized in that: The lower end of the detector (1) is fixedly connected to a base (2), a base plate (3) is fixedly connected to the side wall of the base (2), and a vertical column (4) is fixedly connected to the upper end of the base plate (3). The upper end of the vertical column (4) is connected to a placement component; two support columns (5) are fixedly connected to the side wall of the vertical column (4), and one end of each of the two support columns (5) is connected to a pin assembly. Each of the two pin assemblies is connected to a push assembly, one end of each of the two push assemblies is connected to the side wall of the support column (5), each of the two push assemblies is connected to a diversion assembly, and each of the two pin assemblies is connected to a moving assembly; A support component is connected to the base plate (3), and the support component is located on the side where the component is placed; The detector (1) is connected to a detection component, the detection component is connected to multiple lifting components, the detector (1) is fixedly connected to a placement seat (6), and the placement seat (6) is connected to an air supply component. The pin assembly includes a socket (10) connected to the upper end of the support column (5). The side wall of the socket (10) is provided with a plurality of holes (11). A rubber plug (12) is fixedly connected to the side wall of the socket (10), and the plurality of rubber plugs (12) are respectively located on one side of the plurality of holes (11). The rubber plugs (12) can fix the pin. The socket (10) is connected with a plurality of connecting rods (13). The pushing assembly includes a push rod (16), which moves to insert a fixing needle into the sample; The moving component includes a first electric slide rail (21) fixedly connected to multiple connecting rods (13), a first electric slider (22) slidably connected to the first electric slide rail, an electric telescopic rod (23) fixedly connected to the first electric slider (22), a lifting rod (24) fixedly connected to the electric telescopic rod (23), an adsorption plate (25) fixedly connected to one end of the lifting rod (24), a plurality of first air intakes (26) fixedly connected to the air intake end of the adsorption plate (25), and a second air intake pipe (27) fixedly connected to the adsorption plate (25). The bearing component includes a second electric slide rail (29) fixedly connected to the base plate (3), a matching second electric slider (30) slidably connected to the second electric slide rail (29), a vertical rod (31) fixedly connected to the second electric slider (30), a placement plate (32) fixedly connected to the upper end of the vertical rod (31), and a magnetic plate (33) fixedly connected to the placement plate (32). The detection component includes a horizontal plate (34) fixedly connected to the detector (1); The lifting assembly includes a hydraulic rod (38) that runs through the horizontal plate (34). The lower end of the hydraulic rod (38) is fixedly connected to a vertical pipe (39). A third suction pipe (40) is fixedly connected to the side wall of the vertical pipe (39). A second solenoid valve (41) is provided on the third suction pipe (40). A second suction head (42) is fixedly connected to the lower end of the vertical pipe (39). After the fixing pins are inserted into the sample, the electric telescopic rod (23) works, the height of the lifting rod (24) is adjusted, the adsorption plate (25) comes into contact with the sample, and the sample is adsorbed. The first electric slide rail (21) works, and the sample is moved to the placement plate (32). After the second electric slider (30) moves to the appropriate position, the hydraulic rod (38) works, causing the vertical tube (39) to descend. At the same time, the second solenoid valve (41) is closed, so that the sample cover on the second suction head (42) can cover the sample.

2. The device for testing the bonding strength of corrugated paper according to claim 1, characterized in that: The placement assembly includes a fixing plate (7) fixedly connected to the upper end of the vertical column (4), the fixing plate (7) is provided with a plurality of air intake holes (8), and the air intake end of the fixing plate (7) is fixedly connected to a first air intake pipe (9).

3. The device for testing the bonding strength of corrugated paper according to claim 2, characterized in that: The pushing assembly includes a fixed plate (14) fixedly connected to one end of multiple connecting rods (13), multiple push columns (15) fixedly connected to the fixed plate (14), push rods (16) inserted into each of the multiple push columns (15), and a support rod (28) fixedly connected to the fixed plate (14), one end of the support rod (28) being connected to the side wall of the support column (5).

4. The device for testing the bonding strength of corrugated paper according to claim 3, characterized in that: The diversion assembly includes a connecting pipe (17) fixedly connected to one end of multiple push rods (15), each of the multiple connecting pipes (17) is provided with a first solenoid valve (18), and one end of the multiple connecting pipes (17) is fixedly connected to the same diversion plate (19), and the air inlet end of the diversion plate (19) is fixedly connected to an air inlet pipe (20).

5. The device for testing the bonding strength of corrugated paper according to claim 1, characterized in that: A bending rod (35) is fixedly connected to the horizontal plate (34), and a mounting plate (36) is fixedly connected to one end of the bending rod (35). A detection head (37) is fixedly connected to the mounting plate (36).

6. The device for testing the bonding strength of corrugated paper according to claim 1, characterized in that: The air supply assembly includes an air pump (43) fixedly connected to the placement base (6). The input and output ends of the air pump are both fixedly connected to a first pipe (44). A second pipe (45) is fixedly connected to each of the two first pipes (44). A third solenoid valve (46) is provided on each of the two second pipes (45). Multiple third pipes (47) are connected to each of the two first pipes (44).

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