Automatic bubble cleaning machine for fresh fish

Abstract

The application relates to the technical field of aquatic product processing, and discloses an automatic bubble cleaning machine for fresh fish processing, which comprises a cleaning machine, the cleaning machine is provided with a cleaning tank, a conveying device is arranged in the cleaning tank, the conveying device comprises symmetrical and uniformly distributed transmission belts and conveying belts arranged on the transmission belts, the transmission belts are provided with uniformly distributed limiting rods, uniformly distributed connecting holes are arranged on the conveying belts, the limiting rods penetrate through the connecting holes, and uniformly distributed bubble generators are arranged in the cleaning tank. The limiting rods movably connect the conveying belts and the transmission belts, so that the bubbles blocked by the conveying belts break under the conveying belts, the impact force generated by the breaking of the bubbles drives the conveying belts to vibrate and deform at high frequency, the fresh fish on the conveying belts continuously changes the positions of the fresh fish under the vibration and deformation of the conveying belts, the fresh fish on the conveying belts are spread flat, and the problem that the cleaning effect of the bubbles on the accumulated fresh fish is poor due to the accumulation of the fresh fish is solved.

Description

Technical Field

[0001] This application relates to the field of aquatic product processing technology, and in particular to an automatic bubble cleaning machine for fresh fish processing. Background Technology

[0002] Nowadays, many manufacturers use automatic bubble washing machines to perform a preliminary and efficient cleaning of fresh fish before proceeding with further processing.

[0003] The bubble cleaning machine primarily uses a water pump to pump clean water into a cleaning tank. Inside the tank, a conveyor belt, equipped with numerous perforations, circulates the water via chain or belt drive. Fresh fish, positioned on the conveyor belt, gradually pass through the cleaning tank. Simultaneously, an air pump injects air into a bubble generator located at the bottom of the tank. This generator produces a large number of bubbles in the water, forming a bubble cloud. This bubble cloud rapidly rises (at speeds reaching tens of meters per second), passing through the sealed perforations on the conveyor belt to the top. As the bubbles approach the surface of the fish, they burst, generating strong impact and shear forces (including eddies), removing impurities from the fish's surface. The bursting bubbles also agitate the surrounding water, causing the removed impurities to rise to the surface under the upward impact of the bursting bubbles. These impurities are then discharged through perforations in the side wall of the cleaning tank into a wastewater tank, where they are removed by a circulating water pump.

[0004] Existing bubble cleaning machines rely on a cloud-like structure where bubbles rise to the surface and pass through a conveyor belt before contacting the fish. However, this method results in a significant number of bubbles being blocked by areas on the conveyor belt without perforations, preventing them from reaching the fish. This reduces the amount of bubbles the fish encounters per unit time, leading to low cleaning efficiency. Furthermore, because fish are mostly flat and heavy, they cannot be easily turned over by the movement of bubbles on the conveyor belt. This prevents bubbles from directly contacting the fish in contact with the unperforated parts of the conveyor belt. In areas where the fish are in contact with perforations, the diameter of the perforations limits the number of bubbles that can burst within the perforations. The resulting impact makes it difficult for subsequent bubbles to enter these perforations, undoubtedly resulting in poor overall cleaning performance. Summary of the Invention

[0005] This application proposes an automatic bubble cleaning machine for fresh fish processing. The machine features a conveyor belt that vibrates due to bubble impact, causing the fresh fish to spread out and change its original position. As the fish moves, it receives more direct contact with the bubbles for cleaning. A pusher seat pushes the conveyor belt upwards, increasing the area of ​​the air jets. This allows more bubbles to directly contact the fish through the enlarged air jets. The conveyor belt's stretching and deformation also causes the fish to tumble and turn over. A squeezing belt further compresses the bubbles in the upper space, accelerating their bursting. This accelerated bursting enhances the vibration effect of the conveyor belt. These advantages, along with the squeezing belt's ability to compress the bubbles in the upper space through the air jets, address the problems in existing bubble cleaning machines where the fish cannot be turned over, the amount of bubbles directly contacting the fish is insufficient, and the cleaning effect is poor.

[0006] To achieve the above objectives, this application adopts the following technical solution: an automatic bubble cleaning machine for fresh fish processing, comprising a cleaning machine, the cleaning machine being provided with a cleaning tank, a conveying device being provided within the cleaning tank, the conveying device comprising symmetrically distributed transmission belts and a conveyor belt located on the transmission belts, for transporting fresh fish to the cleaning tank to receive bubbles for cleaning; the transmission belts being provided with evenly distributed limiting rods, the conveyor belts having evenly distributed connecting holes, the limiting rods passing through the connecting holes for limiting the movement direction of the conveyor belts, the conveyor belts having evenly distributed air jet holes for providing flow space for the bubbles; a rotating rod being provided within the cleaning tank, the rotating rod being sleeved with two symmetrical gears, the bottom end of the transmission belt having evenly distributed driven teeth meshing with the gears for driving the transmission belt to move; an evenly distributed bubble generator and a hydraulic cylinder being provided within the cleaning tank, the hydraulic cylinder having a hydraulic rod sleeved within it, the top end of the hydraulic rod having a jacking seat, the jacking seat being located below the conveyor belts for squeezing the conveyor belts upwards.

[0007] Preferably, the cleaning machine has two symmetrical drain troughs located on both sides of the cleaning tank, and an overflow hole is provided between the drain trough and the top of the cleaning tank for discharging wastewater from the cleaning tank.

[0008] Preferably, the bottom of the cleaning machine is provided with a frame, on which an air pump, a water pump, a control assembly and a transmission assembly are provided.

[0009] Preferably, the rotating rod is connected to the transmission assembly to provide power for the movement of the transmission belt, and the bubble generator is connected to the air pump to receive air and form high-speed bubbles in the water.

[0010] Preferably, the cleaning tank is provided with a shelf, and the bubble generator and hydraulic cylinder are both located on the shelf to keep the positions of the bubble generator and hydraulic cylinder stable.

[0011] Preferably, a rolling rod is hinged to the top of the top moving seat to reduce friction and wear of the conveyor belt.

[0012] Preferably, two symmetrical sliding grooves are provided on the two side walls of the cleaning tank, and the side of the transmission belt closest to the inner wall of the cleaning tank is inserted into the sliding groove to limit the shape of the transmission belt.

[0013] Preferably, the conveyor belt is provided with evenly distributed partitions, which are located on the center line of two adjacent conveyor belts, and are used to cooperate with the stretching deformation of the conveyor belt to make the fresh fish roll and spread out to both sides.

[0014] Preferably, the conveyor belt is made of elastic, wear-resistant rubber to provide the necessary conditions for the conveyor belt to undergo tensile deformation.

[0015] Preferably, a compression belt is provided below the conveyor belt, and the top end of the compression belt is connected to a uniformly distributed spring. The top end of the spring is connected to the bottom end of the conveyor belt to form a space for the compression bubble to burst and flow. The compression belt has uniformly distributed connecting holes on both sides. The limiting rod passes through the connecting hole on the compression belt and then through the connecting hole on the conveyor belt to keep the compression belt and the conveyor belt moving synchronously. The compression belt has uniformly distributed expanding holes, the diameter of which is larger than the diameter of the air jet hole, to provide space for the bubble to flow.

[0016] This application has the following beneficial effects:

[0017] This application provides an automatic bubble cleaning machine for fresh fish processing. The transmission assembly controls gear rotation, causing the gears to mesh with driven teeth, driving a transmission belt in a cyclical motion. The moving transmission belt, through a limiting rod, compresses a conveyor belt made of elastic, wear-resistant rubber, causing the conveyor belt to move synchronously with the transmission belt. Since the conveyor belt and transmission belt are only connected by the limiting rod, when bubbles blocked by the conveyor belt burst below it, the resulting impact causes the conveyor belt to vibrate and deform at high frequency. This vibration and deformation causes the fresh fish on the conveyor belt to continuously change their position, spreading them out evenly and preventing the problem of poor cleaning effect from accumulated fish due to bubble buildup.

[0018] Meanwhile, as the fresh fish continuously changes its position under the high-frequency vibration of the conveyor belt, the vibrated fish will detach from the conveyor belt in a short time. This allows a large number of air bubbles to reach the space between the fish and the conveyor belt and burst, completing the air bubble cleaning of the parts of the fish that are in direct contact with the conveyor belt, further improving the overall cleaning effect of the fish.

[0019] Simultaneously, the hydraulic cylinder intermittently drives the hydraulic rod upward, which in turn drives the top seat to rise intermittently. This causes the top seat to intermittently lift the section of the conveyor belt with partitions, causing the conveyor belt to deform upward at the top seat, forming a wave crest. At this time, the fresh fish located on both sides of the partition will roll to both sides, turning the fish over during the rolling process. This allows most of the fish to receive more bubble cleaning after turning over. As the fish roll, they will accumulate together. Through the subsequent high-frequency vibration of the conveyor belt, the accumulated fish will be spread out again. During the spreading process, for example, part of one fish will be placed on top of another fish, reducing the direct contact area between the fish and the conveyor belt and increasing the direct contact area with the bubbles (compared to the area of ​​one side of the fish directly contacting the conveyor belt), further improving the cleaning effect of the fish.

[0020] At the same time, the stretching deformation of the conveyor belt increases the area of ​​the air jets on the conveyor belt, allowing more air bubbles to reach the top of the conveyor belt through the air jets. As the conveyor belt stretches and deforms and the fresh fish tumbles, more air bubbles can directly contact the tumbling fish, further improving the cleaning effect of the fresh fish. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0022] This application can be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0023] Figure 1 This is a three-dimensional structural diagram of the cleaning machine of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the cleaning machine of the present invention;

[0025] Figure 3 This is a schematic diagram showing the structural positions of the transmission belt and the conveyor belt of the present invention;

[0026] Figure 4 This is a schematic diagram showing the structural positions of the extrusion belt and the conveyor belt in Embodiment 4 of the present invention.

[0027] Figure label:

[0028] 1. Cleaning machine; 2. Cleaning tank; 201. Sliding trough; 3. Drainage trough; 4. Overflow hole; 5. Frame; 6. Air pump; 7. Control assembly; 8. Transmission assembly; 9. Rotating rod; 901. Gear; 10. Shelf; 11. Bubble generator; 12. Hydraulic cylinder; 13. Hydraulic rod; 14. Top seat; 141. Rolling rod; 15. Transmission belt; 16. Driven gear; 17. Limiting rod; 18. Conveyor belt; 19. Connecting hole; 20. Air jet hole; 21. Partition plate; 22. Extrusion belt; 23. Hole expansion; 24. Spring. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] Example 1

[0031] Please see Figures 1 to 2 An automatic bubble cleaning machine for fresh fish processing includes a cleaning machine 1. A frame 5 is fixedly connected to the bottom of the cleaning machine 1 to fix the position of the cleaning machine 1 and prevent excessive shaking of the cleaning machine 1 during cleaning. The cleaning machine 1 is provided with a cleaning tank 2 and two symmetrical drain tanks 3. A circulating water pump is provided in the drain tanks 3. The two drain tanks 3 are located on both sides of the cleaning tank 2. An overflow hole 4 is provided between the top of the drain tank 3 and the cleaning tank 2. After the bubbles clean the impurities on the fresh fish, the impurities will float to the surface of the liquid under the push of the bubbles. The impurities will follow the agitated liquid surface and enter the drain tank 3 through the overflow hole 4, and then be discharged by the circulating water pump in the drain tank 3.

[0032] participate Figures 1 to 2 An air pump 6 and a water pump are fixedly connected to the bottom of the frame 5, and a control assembly 7 is fixedly connected to the top of the frame 5. The control assembly 7 includes an existing electronic controller, a hydraulic control system, and an intelligent control system. A transmission assembly 8 is mounted on the frame 5. The transmission assembly 8 can adopt an existing belt drive system, gear drive system, or chain drive system. The air pump 6, water pump, circulating water pump, transmission assembly 8, bubble generator 11, and hydraulic cylinder 12 are all controlled by the control assembly 7 to ensure the normal operation of the cleaning machine 1 under various environments and requirements.

[0033] See Figures 2 to 3A shelf 10 is fixedly connected to the middle of the cleaning tank 2. Evenly distributed bubble generators 11 are fixedly connected to the shelf 10. The bubble generators 11 are connected to an air pump 6, allowing the air pump 6 to input air into the bubble generators 11, causing the bubble generators 11 to generate a large number of cleaning bubbles in the water of the cleaning tank 2. Evenly distributed hydraulic cylinders 12 are fixedly connected to the shelf 10. The hydraulic cylinders 12 are hydraulically connected to the control assembly 7. A hydraulic rod 13 is installed inside the hydraulic cylinder 12, and a top actuating seat 14 is fixedly connected to the top of the hydraulic rod 13. This allows the control assembly 7 to control the hydraulic cylinder 12, causing the hydraulic rod 13 to intermittently lift, which in turn causes the top actuating seat 14 to intermittently lift. 14 When lifted, the part of the conveyor belt 18 with partition 21 is deformed upward, causing the fresh fish on both sides of the partition 21 to roll to both sides at the position where the conveyor belt 18 forms a wave crest, thereby turning the fresh fish over and improving the overall cleaning effect of the fresh fish in the cleaning tank 2. The top of the push seat 14 is hinged with a rolling rod 141, so that the rolling rod 141 is in direct contact with the bottom end of the conveyor belt 18, allowing the conveyor belt 18 to slide between the rolling rod 141, thereby reducing the wear of the conveyor belt 18 and reducing the resistance encountered by the conveyor belt 18 when it deforms upward and continues to move forward with the transmission belt 15. Waterproof sleeves can be fitted on the outside of the bubble generator 11, hydraulic cylinder 12 and hydraulic rod 13.

[0034] See Figure 2 The washing machine 1 has a rotating rod 9 movably sleeved inside. One end of the rotating rod 9 is connected to the transmission assembly 8. The number of rotating rods 9 is set according to the actual situation. Two symmetrical gears 901 are fixedly sleeved on the rotating rod 9. The gears 901 are located in the washing tank 2. They drive the transmission belt 15 to move by meshing with the driven gear 16 and support the transmission belt 15, improve the overall strength of the transmission belt 15, and maintain the position of the transmission belt 15. This prevents the transmission belt 15 from deviating or sinking due to the fresh fish squeezing the transport belt 18.

[0035] See 2 to Figure 3Two symmetrical sliding grooves 201 are provided on both side walls of the washing tank 2. Evenly distributed transmission belts 15 are movably fitted within the sliding grooves 201, restricting the position of the transmission belts 15 and maintaining their shape. This prevents the transmission belts 15 from shifting due to their own weight or the weight of the fresh fish. A gap exists between two adjacent transmission belts 15 to provide sufficient space for the conveyor belt 18 to deform upwards. The transmission belts 15 protrude from the sliding grooves 201, and evenly distributed driven teeth 16 are fixedly connected to the bottom end of the protruding portion of the transmission belt 15. The driven teeth 16 mesh with gears 901, and through this meshing... The moving gear 16 drives the transmission belt 15 to move. The top of the part of the transmission belt 15 that protrudes from the sliding groove 201 is fixedly connected with evenly distributed limiting rods 17. When the transmission belt 15 moves, it can squeeze the conveyor belt 18 through the limiting rods 17, causing the part of the conveyor belt 18 to deform until the deformation balance is reached (the contact part between the conveyor belt 18 and the limiting rod 17 can still deform). The limiting rod 17 will push the conveyor belt 18 to move synchronously with the transmission belt 15. The transmission belt 15 that is not meshed with the gear 901 will be squeezed by the limiting rod 17 on the transmission belt 15 by the conveyor belt 18, causing the transmission belt 15 at this point to move synchronously.

[0036] See Figures 2 to 3 The washing tank 2 is equipped with a conveyor belt 18. Evenly distributed connecting holes 19 are provided on both sides of the conveyor belt 18. A limiting rod 17 passes through the connecting holes 19, restricting the movement of the conveyor belt 18. The height of the limiting rod 17 is greater than the thickness of the conveyor belt 18. When the conveyor belt 18 vibrates due to the impact of air bubbles or deforms upwards, the limiting rod 17 can limit the movement of the conveyor belt 18, ensuring that the conveyor belt 18 always follows the drive belt 15. The length of the connecting hole 19 is greater than the diameter of the limiting rod 17, allowing space for the limiting rod 17 to move when the conveyor belt 18 deforms upwards. The conveyor belts 18 on both sides of the partition 21 deform in opposite directions. Figure 3For example, when the part of the conveyor belt 18 with the partition 21 deforms upward, the conveyor belt 18 on the right side of the partition 21 stretches and deforms to the left. At this time, the right limit rod 17 moves to the right relative to the conveyor belt 18 moving to the left (the position of the limit rod 17 remains unchanged, it is the conveyor belt 18 that is stretched), while the left conveyor belt 18 stretches and deforms to the right. At this time, the left limit rod 17 will further compress with the connecting hole 19. The bottom ends of both sides of the conveyor belt 18 are attached to the top of the transmission belt 15, so that the transmission belt 15 limits the conveyor belt 18 and keeps the conveyor belt 18 in a straight state. The conveyor belt 18 is provided with evenly distributed air jet holes 20, so that the air bubbles can reach the top of the conveyor belt 18 through the air jet holes 20 to clean the fresh fish above the conveyor belt 18. During washing, when the conveyor belt 18 undergoes stretching deformation, the area of ​​the air jet 20 will increase, and the amount of air bubbles passing through the air jet 20 will increase, allowing more air bubbles to directly contact the tumbling fresh fish per unit time, thus efficiently cleaning the fresh fish. The conveyor belt 18 is fixedly connected with evenly distributed partitions 21, which are located on the center line of two adjacent conveyor belts 15. When the conveyor belt 18 at the partition 21 deforms upward to form a crest, the fish on both sides of the partition 21 can roll to both sides, turning the fresh fish over. At the same time, after the fresh fish is cleaned, the partition 21 will push the fresh fish away from the washing machine 1. The conveyor belt 18 is made of elastic wear-resistant rubber, which allows the conveyor belt 18 to vibrate and deform. The conveyor belt 18 is located below the overflow hole 4.

[0037] Example 2

[0038] Please see Figure 3 Based on Embodiment 1, the transmission belt 15 can be made of an articulated metal block to improve the wear resistance of the transmission belt 15.

[0039] Example 3

[0040] Please see Figure 4 Based on Embodiment 1, the transmission belt 15 can be made of elastic rubber to improve the smoothness of the transmission belt 15 at the inflection point.

[0041] Example 4

[0042] Please see Figure 4 Based on Embodiment 1, a compression belt 22 is provided below the conveyor belt 18. The compression belt 22 has evenly distributed connecting holes 19 on both sides. The bottom ends of both sides of the compression belt 22 are attached to the top end of the transmission belt 15, so that the transmission belt 15 can limit the compression belt 22 and keep the compression belt 22 in a straight state. The limiting rod 17 passes through the connecting hole 19 on the compression belt 22 and then through the connecting hole 19 on the conveyor belt 18, so that the transmission belt 15 can drive the compression belt 22 and the conveyor belt 18 to move synchronously through the limiting rod 17.

[0043] The extrusion belt 22 has evenly distributed enlarged holes 23, the diameter of which is larger than the diameter of the air jet holes 20. This allows a large number of bubbles to pass through the enlarged holes 23 to reach the bottom of the conveyor belt 18 and through the air jet holes 20 to reach the top of the conveyor belt 18, avoiding the problem of reduced bubble volume reaching the top of the conveyor belt 18 due to the extrusion belt 22. Evenly distributed springs 24 are fixedly connected to the top of the extrusion belt 22, and the top of the springs 24 is fixedly connected to the bottom of the conveyor belt 18. When the push seat 14 moves upward, the rolling rod 141 will first contact the extrusion belt 22, pushing the extrusion belt 22... As the extrusion belt 22 stretches upwards, the area of ​​the expansion hole 23 increases, increasing the amount of air bubbles entering between the extrusion belt 22 and the conveyor belt 18. The extrusion belt 22, stretching upwards, will tilt and compress the tension spring 24 before pushing the conveyor belt 18 upwards. This reduces the space between the deformed part of the extrusion belt 22 and the conveyor belt 18, causing the air bubbles in the extrusion space to burst rapidly. This increases the vibration frequency of the conveyor belt 18, and under the extrusion, more air bubbles will reach the top of the conveyor belt 18 through the air jet hole 20, further improving the cleaning effect of the fresh fish.

Claims

1. An automatic bubble washing machine for fresh fish processing, characterized by, The utility model provides a fresh fish cleaning machine, including cleaning machine (1), the cleaning machine (1) is provided with cleaning tank (2), be provided with conveying device in cleaning tank (2), the conveying device includes symmetrical uniform distribution transmission belt (15) and the transportation belt (18) on transmission belt (15), is used for conveying fresh fish to receive bubble in cleaning tank (2) and washes; The transmission belt (15) is provided with uniformly distributed limiting rods (17), the transportation belt (18) is provided with uniformly distributed connecting holes (19), the limiting rods (17) penetrate the connecting holes (19), for limiting the movement direction of the transportation belt, the transportation belt (18) is provided with uniformly distributed air injection holes (20), for providing the flow space of bubble; The cleaning tank (2) is provided with a rotating rod (9), the rotating rod (9) is sleeved with two symmetrical gears (901), the bottom end of the transmission belt (15) is provided with uniformly distributed driven teeth (16) engaged with the gears (901), for driving the transmission belt (15) to move; The cleaning tank (2) is provided with uniformly distributed bubble generators (11) and hydraulic cylinders (12), the hydraulic cylinder (12) is sleeved with a hydraulic rod (13), the top end of the hydraulic rod (13) is provided with a top driving seat (14), the top driving seat (14) is located below the transportation belt (18), for extruding the transportation belt (18) to deform upward.

2. The automatic bubble cleaning machine for fresh fish according to claim 1, wherein The cleaning machine (1) is provided with two symmetrical sewage tanks (3), the two sewage tanks (3) are located on both sides of the cleaning tank (2), the sewage tank (3) and the top of the cleaning tank (2) are provided with overflow holes (4), for discharging sewage in the cleaning tank (2).

3. The automatic bubble cleaning machine for fresh fish according to claim 1, wherein The bottom of the cleaning machine (1) is provided with a rack (5), the rack (5) is provided with an air pump (6), a water pump, a control assembly (7) and a transmission assembly (8).

4. The automatic bubble cleaning machine for fresh fish according to claim 3, wherein The rotating rod (9) is in transmission connection with the transmission assembly (8), for providing power for the movement of the transmission belt (15), the bubble generator (11) is connected with the air pump (6), for receiving air to form high-speed bubbles in water.

5. The automatic bubble cleaning machine for fresh fish according to claim 4, wherein The cleaning tank (2) is provided with a placing plate (10), the bubble generator (11) and the hydraulic cylinder (12) are located on the placing plate (10), for keeping the position of the bubble generator (11) and the hydraulic cylinder (12) stable.

6. The automatic bubble cleaner for fresh fish according to claim 1, wherein The top of the top driving seat (14) is hinged with a rolling rod (141), for reducing the friction and wear of the transportation belt (18).

7. The automatic bubble cleaner for fresh fish according to claim 1, wherein The two side walls of the cleaning tank (2) are provided with two symmetrical sliding grooves (201), the transmission belt (15) is inserted into the sliding groove (201) near the inner wall of the cleaning tank (2), for limiting the shape of the transmission belt (15).

8. The automatic bubble cleaner for fresh fish according to claim 1, wherein The transportation belt (18) is provided with uniformly distributed partitions (21), the partitions (21) are located on the center lines of two adjacent transmission belts (15), there is a gap between the two adjacent transmission belts (15), for cooperating with the tensile deformation of the transportation belt (18), so that the fresh fish rolls and spreads to both sides.

9. The automatic bubble cleaner for fresh fish according to claim 1, wherein The transportation belt (18) is made of elastic wear-resistant rubber, for providing the prerequisite for the tensile deformation of the transportation belt (18).

10. The automatic bubble cleaning machine for fresh fish according to claim 1, wherein The lower part of the conveying belt (18) is provided with an extrusion belt (22), the top end of the extrusion belt (22) is connected with uniformly distributed springs (24), the top end of the spring (24) is connected with the bottom end of the conveying belt (18), which is used for forming the space for extruding bubble breaking and bubble flowing, uniformly distributed connecting holes (19) are arranged on the two sides of the extrusion belt (22), the limiting rod (17) penetrates the connecting hole (19) on the extrusion belt (22) and then penetrates the connecting hole (19) on the conveying belt (18), which is used for keeping the synchronous movement of the extrusion belt (22) and the conveying belt (18), uniformly distributed expansion holes (23) are arranged on the extrusion belt (22), the diameter value of the expansion hole (23) is greater than the diameter value of the air injection hole (20), which is used for providing the flowing space of the bubbles.

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