Filtering device for processing and producing instant fish maw

Abstract

The invention relates to the technical field of food processing machinery, and discloses an instant fish maw processing, producing and filtering device which comprises a soaking pool, a flexible filtering inner container is transversely arranged in the soaking pool and used for containing fish maw, and the two ends of the flexible filtering inner container are fixedly connected with a feeding pipe and a discharging pipe respectively. Pipe bodies of the feeding pipe and the discharging pipe penetrate through and are fixedly connected to the side walls of the two ends of the soaking pool respectively, a peristaltic wave driving unit and a fluid replacement unit are arranged outside the flexible filtering inner container, the peristaltic wave driving unit is used for generating peristaltic waves propagating in the axial direction on the flexible filtering inner container, and the fluid replacement unit is used for replacing the peristaltic waves on the flexible filtering inner container. And the fluid replacement unit is used for executing a water inlet action at the creeping wave peak position and executing a pollution discharge action at the creeping wave valley position. The flexible filtering inner container serves as a bearing interface, and programmed flexible rubbing force is generated through the peristaltic wave driving unit. And the force is uniformly and controllably acted on the surface of the fish maw, so that the damage of high shearing force to a delicate collagen gel structure after soaking is avoided.

Description

Technical Field

[0001] This invention relates to the field of food processing machinery technology, specifically to a filtration device for processing ready-to-eat fish maw. Background Technology

[0002] As a high-value nutritional food, the processing of ready-to-eat fish maw has a decisive impact on the final quality and taste of the product. After soaking, the structure of fish maw transforms into a highly hydrated gel state, becoming exceptionally delicate and elastic. At the same time, the complex internal and external folds naturally formed in fish maw become even more relaxed and refined after soaking. These folds, gaps, and pores easily trap residual inner membranes, blood streaks, and other minute impurities generated during processing.

[0003] In existing industrial production, how to clean fish maw, which is both delicate and structurally complex, efficiently and without damage has long been an industry challenge. Traditional cleaning methods often fail to balance thorough cleaning with the integrity of the fish maw's tissues.

[0004] For example, some processing methods employ high-pressure water jet rinsing or strong mechanical stirring. While this cleaning method, which relies on "rigid impact force," can remove some impurities to a certain extent, its high-intensity shearing force can easily cause irreversible physical damage to the gel structure of the soaked fish maw, such as causing it to break, tear, or lose its shape, seriously affecting the product's appearance and yield.

[0005] To avoid the aforementioned damage, the industry has attempted to use relatively gentle cleaning methods, such as prolonged static soaking or gentle agitation using air bubbles. However, while these methods improve the preservation of fish maw's integrity, they significantly reduce its cleaning effectiveness. For adhesive impurities deeply embedded within the delicate folds of the fish maw, passive diffusion or slight disturbance by the fluid alone is almost insufficient for effective removal. This results in numerous cleaning "blind spots," and the residual impurities not only affect the taste but also pose food safety risks, making it difficult to control the quality uniformity between product batches.

[0006] Therefore, existing technologies have always faced a prominent technical contradiction: strong cleaning methods inevitably damage the fish maw tissue, while gentle cleaning methods cannot achieve deep cleaning. Currently, there is an urgent need for a completely new technical solution that can effectively replace impurities by penetrating the microscopic folds of the fish maw, while simultaneously applying sufficiently gentle force to completely avoid physical damage to the delicate fish maw itself. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the technical contradiction between incomplete cleaning and damage to the delicate tissue of fish maw when processing soaked ready-to-eat fish maw in the prior art, due to the use of rigid impact force or random cleaning methods. Furthermore, the prior art cannot effectively clean the dead corners of the surface and internal folds of the fish maw.

[0008] To solve the above-mentioned technical problems, the present invention provides a novel filtration device for processing ready-to-eat fish maw. This is achieved through the following technical solution: A filtration device for processing ready-to-eat fish maw includes a soaking tank. A flexible filter inner liner is horizontally placed in the soaking tank to hold the fish maw. An inlet pipe and an outlet pipe are fixedly connected to both ends of the flexible filter inner liner. The pipe bodies of the inlet pipe and the outlet pipe pass through and are fixedly connected to the side walls at both ends of the soaking tank. A peristaltic wave driving unit and a fluid displacement unit are arranged outside the flexible filter inner liner. The peristaltic wave driving unit generates peristaltic waves that propagate axially on the flexible filter inner liner. The fluid displacement unit performs water intake at the peak of the peristaltic wave and sewage discharge at the trough of the peristaltic wave. A secondary separation device is arranged below the outlet pipe. After the fish maw is discharged from the outlet pipe along with water under the action of the peristaltic wave, the secondary separation device separates the fish maw from the water and any remaining impurities in the water.

[0009] Preferably, the flexible filter liner is made of food-grade high-elasticity polymer material, and its liner wall has multiple filter holes. The pore size of the filter holes is suitable for allowing impurities and water to pass through, while blocking fish maw.

[0010] Preferably, the secondary separation device includes a filter tank, a wastewater tank is provided below the filter tank, and a water outlet is provided above the filter tank. The bottom wall of the filter tank is made of a screen with a wedge-shaped wire structure. The filter tank includes an inclined part and a storage part, which are connected. The inclined part is inclined, with its highest point located directly below the discharge pipe and its lowest point connected to the storage part. The storage part is used to temporarily store the filtered fish maw. An overflow pipe is also provided above the wastewater tank. The overflow pipe is connected to an overflow outlet opened on the side wall of the soaking tank. Excess water and impurities enter the overflow pipe through the overflow outlet and flow into the wastewater tank.

[0011] Preferably, the peristaltic wave drive unit includes a crankshaft, with both ends of the crankshaft rotatably connected to the inner walls of both ends of the soaking tank, and one end of the crankshaft penetrating the soaking tank and fixedly connected to the output end of a motor. The outer wall of the motor is fixedly connected to the outer wall of the soaking tank. A first connecting rod is rotatably connected to one end of the connecting rod journal of the crankshaft, and a second connecting rod is rotatably connected to the other end of the first connecting rod. A sleeve is fixedly connected to the top end of the second connecting rod, and the sleeve is fitted and fixedly connected to the outer wall of the flexible filter inner liner. A support plate is provided between the crankshaft and the flexible filter inner liner. Both ends of the support plate are fixedly connected to the inner walls of both ends of the soaking tank. The plate body of the support plate has multiple sliding grooves corresponding to the second connecting rods one by one, and the rod body of the second connecting rod passes through and is slidably connected in the sliding grooves.

[0012] Preferably, the fluid replacement unit includes a plurality of first spray pipes and first suction pipes, which are arranged in pairs and correspond one-to-one with the second connecting rod. The first spray pipes are located above the flexible filter inner tank and the water outlet faces the flexible filter inner tank. The first suction pipes are located below the flexible filter inner tank and the water inlet faces the flexible filter inner tank. The first spray pipes are connected to the output end of the first water pump. The input end of the first water pump is connected to the outlet end of the first purified water tank. The inlet end of the first purified water tank is connected to the outlet end of the first filter. The inlet end of the first filter is connected to the first suction pipe.

[0013] Preferably, the inlet of the first filter is also connected to the outlet of the sewage tank, and the input of the outlet device is connected to the output of the first water pump.

[0014] Preferably, the peristaltic wave driving unit includes multiple sleeves, which are evenly distributed and fitted onto the outside of the flexible filter inner tank. The outer walls of the sleeves are fixedly connected to the inner wall of the soaking tank via supports. The inner walls of the sleeves and the outer walls of the flexible filter inner tank are connected via water bladders. The inlet end of the water bladder is connected to the output end of the second water pump via a second spray pipe, and the outlet end of the water bladder is connected to the outlet end of the second purified water tank via a second suction pipe. The inlet end of the second purified water tank is connected to the outlet end of the second filter, and the second suction pipe is connected to the second spray pipe. Each pipe is equipped with a solenoid valve. The pressure of the water bladder is controlled by the second water pump and the opening and closing of the solenoid valve in a timed manner, which drives the flexible filter inner liner to deform. When water is injected into the water bladder and pressurized, the water bladder expands. Its expansion force is constrained by the sleeve, which then applies radial extrusion force to the flexible filter inner liner, causing the corresponding flexible filter inner liner to contract inward, thus forming a crest on the outside of the fish maw. When water is pumped out and the pressure is released, the water bladder contracts, and the flexible filter inner liner expands and recovers, forming a trough. The crests and troughs alternate in sequence to form a peristaltic wave that propagates along the axial direction.

[0015] Preferably, the fluid replacement unit includes multiple third spray pipes and third suction pipes, and both pipes are equipped with solenoid valves. One end of the third spray pipe is connected to the output end of the second water pump, and one end of the third suction pipe is connected to the inlet end of the second filter. The sleeve has a drainage chamber and a suction chamber that are separated from each other, and both have openings facing the flexible filter inner liner. The drainage chamber is connected to the other end of the third spray pipe, and the suction chamber is connected to the other end of the third suction pipe. When the flexible filter inner liner contracts inward, water containing impurities is extracted through the suction chamber. When the flexible filter inner liner expands and recovers, clean water is injected into it through the drainage chamber.

[0016] Preferably, the inlet of the second filter is also connected to the outlet of the sewage tank, and the input of the outlet device is connected to the output of the second water pump.

[0017] This invention provides a filtration device for processing ready-to-eat fish maw, which has the following beneficial effects: 1. This invention utilizes a flexible filter inner liner as the bearing interface and generates a programmed, gentle kneading force through a peristaltic wave drive unit. This force acts evenly and controllably on the surface of the fish maw, avoiding damage to the delicate collagen gel structure after soaking due to high shear forces. Simultaneously, through the synergistic action of the fluid displacement unit and the peristaltic wave, at the trough of the peristaltic wave, the fish maw folds are gently stretched and opened. At this time, the fluid displacement unit synchronously triggers the drainage chamber to perform active infusion, directly delivering fresh, clean water into the depths of the folds, achieving a synergistic cleaning process of "stretching-infusion." At the subsequent crest of the peristaltic wave, the fish maw folds are compressed, squeezing out the turbid fluid mixed with impurities. At this point, the fluid displacement unit synchronously triggers active extraction, "targeting" and removing contaminants before they spread, preventing backflow and secondary adhesion of turbid water.

[0018] 2. This invention achieves a secondary separation and rinsing mechanism for fish maw through the setting of a secondary separation device, ensuring the cleanliness of the final product. After being discharged from the discharge pipe with the water flow, the fish maw enters the secondary separation device. This device utilizes a wedge-shaped wire structure screen at the bottom of the filter tank to achieve efficient solid-liquid separation. At the same time, a gentle water curtain output from the water outlet device performs a secondary rinsing of the fish maw as it slides down the inclined section, thoroughly removing any residual impurities that may be attached. Finally, the fish maw automatically slides into the storage section, realizing the automated connection between cleaning and separation.

[0019] 3. In this invention, the fluid replacement unit and the secondary separation device do not drain water independently. Turbid fluid from the pumping pipe and the sewage tank are both guided to the filter for treatment. The filtered clean water flows back to the clean water tank and is then supplied to the spray pipe and the water outlet device, forming a closed-loop water-saving system that significantly improves water resource utilization. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the secondary separation device in this invention; Figure 3 This is a schematic diagram of the peristaltic wave driving unit in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the peristaltic wave driving unit in Embodiment 2 of the present invention; Figure 5 This is a perspective view of the sleeve in this invention; Figure 6 This is a schematic diagram of the water bladder structure in this invention; Figure 7 This is a schematic diagram of the sleeve structure in this invention.

[0021] The components include: 1. Immersion tank; 2. Flexible filter inner liner; 201. Filter hole; 3. Feed pipe; 4. Discharge pipe; 5. Filter tank; 501. Inclined part; 502. Material storage part; 6. Sewage tank; 7. Water outlet device; 8. Overflow pipe; 9. Crankshaft; 10. Motor; 11. First connecting rod; 12. Second connecting rod; 13. Sleeve; 14. Support plate; 1401. Slide groove; 15. First spray pipe; 16. First pumping pipe; 17. Sleeve; 1701. Drainage chamber; 1702. Pumping chamber; 18. Water bag; 19. Second spray pipe; 20. Second pumping pipe; 21. Third spray pipe; 22. Third pumping pipe. Detailed Implementation

[0022] 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.

[0023] Example 1: Please refer to the appendix. Figure 1 -Appendix Figure 3This invention provides a filtration device for processing ready-to-eat fish maw, including a soaking tank 1. A flexible filter inner liner 2 is horizontally placed in the soaking tank 1 to hold the fish maw. The flexible filter inner liner 2 is made of food-grade high-elasticity polymer material, and its inner wall has multiple filter holes 201. The pore size of the filter holes 201 is suitable for allowing impurities and water to pass through, while blocking the fish maw. The flexible filter inner liner 2 is fixedly connected to the inlet pipe 3 and the outlet pipe 4 at both ends. The pipe bodies of the inlet pipe 3 and the outlet pipe 4 pass through and are fixedly connected to the side walls at both ends of the soaking tank 1. Electrically controlled valves are installed near the pipe openings of the inlet pipe 3 and the outlet pipe 4. The flexible filter inner liner 2 is equipped with a peristaltic wave drive unit and a fluid replacement unit. The peristaltic wave drive unit is used to generate peristaltic waves that propagate along the axis on the flexible filter inner liner 2. The fluid replacement unit is used to perform water intake at the peak of the peristaltic wave and sewage discharge at the trough of the peristaltic wave. A secondary separation device is installed below the outlet pipe 4. After the fish maw is discharged from the outlet pipe 4 along with the water under the action of the peristaltic wave, the secondary separation device separates the fish maw from the water and the impurities remaining in the water.

[0024] Using the flexible filter inner liner 2 as the filter chamber, the peristaltic wave driving unit generates peristaltic waves that propagate axially on the flexible filter inner liner 2. The peristaltic waves act on the surface of the fish maw, generating a gentle kneading force. Under the action of the gentle kneading force, the fine folds of the fish maw periodically open and close, thereby cleaning the fish maw and avoiding the damage of the delicate collagen gel structure to high shear force. Thus, while cleaning, the integrity of the fish maw's tissue and its natural shape are maintained to the maximum extent.

[0025] To further enhance the separation of fish maw from impurities, a fluid displacement unit is used to actively inject purified water into the fish maw when its folds open. This, combined with the stretching action of the folds opening, significantly improves the impurity removal effect. At the same time, when the fish maw shrinks, the turbid fluid in the folds is squeezed out. This portion of the turbid fluid is then actively suctioned out, so that the contaminants are removed as soon as they leave the fish maw, rather than spreading throughout the entire soaking tank 1 and being passively filtered. This prevents the backflow of turbid water and secondary adhesion.

[0026] Through the combined action of the flexible filter inner tank 2, the peristaltic wave drive unit and the fluid replacement unit, the fish maw is separated from the impurities on its surface. Although the fluid replacement unit removes most of the impurities in the water in time, some impurities will still remain in the water. When the fish maw is discharged from the discharge pipe 4 with the water flow, some of the remaining impurities will also be discharged with the water flow. At this time, the fish maw and impurities are separated a second time by the secondary separation device.

[0027] The secondary separation device includes a filter tank 5, a wastewater tank 6 below the filter tank 5, and a water outlet device 7 above it. The bottom wall of the filter tank 5 is made of a screen with a wedge-shaped wire structure. The filter tank 5 includes an inclined part 501 and a storage part 502, which are connected. The inclined part 501 is inclined, with its highest point located directly below the discharge pipe 4 and its lowest point connected to the storage part 502. The storage part 502 is used to temporarily store the filtered fish maw. An overflow pipe 8 is also provided above the wastewater tank 6. The overflow pipe 8 is connected to the overflow outlet opened on the side wall of the soaking tank 1. Excess water and impurities enter the overflow pipe 8 through the overflow outlet and flow into the wastewater tank 6.

[0028] When impurities from the fish maw flow into the filter tank 5 from the discharge pipe 4 with the water flow, the fish maw is trapped by the screen, while the water and impurities pass through the screen and fall into the wastewater tank 6. At the same time, in order to ensure that the impurities remaining on the surface of the fish maw are completely separated, a water curtain output by the water outlet device 7 is used to gently rinse the surface of the fish maw a second time when it falls into the filter tank 5. This is because the impurities remaining on the surface of the fish maw at this time are mostly secondary contamination from impurities in the water. The number of impurities is small and their adhesion is very low. Therefore, the low-impact water curtain output by the simple water outlet device 7 can completely separate the impurities from the fish maw. During the above process, the fish maw also slides down the inclined part 501 under the action of gravity. Finally, the cleaned fish maw falls into the storage part 502.

[0029] The peristaltic wave drive unit includes a crankshaft 9, with both ends of the crankshaft 9 rotatably connected to the inner walls of both ends of the soaking tank 1, and one end of the crankshaft 9 penetrating the soaking tank 1 and fixedly connected to the output end of the motor 10. The outer wall of the motor 10 is fixedly connected to the outer wall of the soaking tank 1. The connecting rod journal of the crankshaft 9 is rotatably connected to one end of the first connecting rod 11, and the other end of the first connecting rod 11 is rotatably connected to the second connecting rod 12. The top end of the second connecting rod 12 is fixedly connected to a sleeve 13, which is fitted and fixedly connected to the outer wall of the flexible filter inner liner 2. A support plate 14 is provided between the crankshaft 9 and the flexible filter inner liner 2. Both ends of the support plate 14 are fixedly connected to the inner walls of both ends of the soaking tank 1, and the plate body of the support plate 14 has multiple sliding grooves 1401 corresponding one-to-one with the second connecting rod 12. The rod body of the second connecting rod 12 passes through and is slidably connected in the sliding grooves 1401.

[0030] In this embodiment, the peristaltic wave driving unit uses the rotation of the crankshaft 9 to drive the flexible filter inner liner 2 to generate peristaltic waves. The crankshaft 9 is driven to rotate by the motor 10, which in turn causes the first connecting rod 11 to drive the second connecting rod 12 to move up and down reciprocally. Ultimately, this drives the evenly distributed points on the flexible filter inner liner 2 to fluctuate up and down, generating troughs and peaks, thus forming peristaltic waves.

[0031] The fluid replacement unit includes multiple first spray pipes 15 and first suction pipes 16, which are arranged in pairs and correspond one-to-one with the second connecting rod 12. The first spray pipes 15 are located above the flexible filter inner tank 2, and their outlets face the flexible filter inner tank 2. The first suction pipes 16 are located below the flexible filter inner tank 2, and their suction ends face the flexible filter inner tank 2. The first spray pipes 15 are connected to the output end of the first water pump. The input end of the first water pump is connected to the outlet end of the first purified water tank. The inlet end of the first purified water tank is connected to the outlet end of the first filter. The inlet end of the first filter is connected to the first suction pipe 16.

[0032] Meanwhile, in this embodiment, the fluid replacement unit consists of multiple first water spray pipes 15, a first water pump 16, a first water pump, a first filter, and a first clean water tank. Through the action of the first water pump, the clean water in the first clean water tank is continuously transported to the first water spray pipe 15 and sprayed out, while the sewage containing impurities is continuously filtered by the first water pump 16 and then returned to the first clean water tank.

[0033] It should be noted that when a part of the flexible filter inner liner 2 is at the crest, it is away from the first water pump pipe 16 and close to the first water spray pipe 15; conversely, when it is at the trough, it is close to the first water pump pipe 16 and away from the first water spray pipe 15.

[0034] The inlet of the first filter is also connected to the outlet of the sewage tank 6, and the input of the outlet device 7 is connected to the output of the first water pump.

[0035] The water in soaking tank 1 is used not only to clean the fish maw under the action of peristaltic waves, but also to soak the fish maw. During the entire process, excess water and some impurities enter the overflow pipe 8 through the overflow outlet and flow into the sewage tank 6, and then enter the first filter to filter into clean water for repeated recycling. At the same time, the water outlet device 7 is supplied with water by the first water pump, and the clean water is sprayed out from the water outlet device 7 to form a water curtain.

[0036] Example 2: Please refer to the appendix. Figure 4 -Appendix Figure 7 Based on the above embodiments, this embodiment differs from the previous embodiments in that it provides another set of different schemes for the peristaltic wave driving unit and fluid displacement unit. The specific scheme is as follows: The peristaltic wave drive unit includes multiple sleeves 17, which are evenly distributed and fitted onto the outside of the flexible filter inner tank 2. The outer walls of the sleeves 17 are fixedly connected to the inner wall of the soaking tank 1 via supports. The inner walls of the sleeves 17 and the outer walls of the flexible filter inner tank 2 are connected by water bladders 18. The inlet end of the water bladder 18 is connected to the output end of the second water pump via a second spray pipe 19, and the outlet end of the water bladder 18 is connected to the outlet end of the second purified water tank via a second suction pipe 20. The inlet end of the second purified water tank is connected to the outlet end of the second filter. Both the second suction pipe 20 and the second spray pipe 19 have... Equipped with a solenoid valve, the pressure in and out of the water bladder 18 is controlled sequentially by the suction of the second water pump and the opening and closing of the solenoid valve, thereby driving the flexible filter inner liner 2 to deform. When water is injected into the water bladder 18 and pressurized, the water bladder 18 expands. Its expansion force is constrained by the sleeve 17, which then applies radial extrusion force to the flexible filter inner liner 2, causing the corresponding flexible filter inner liner 2 to contract inward, thus forming a crest on the outside of the fish maw. When water is pumped out and pressure is released, the water bladder 18 contracts, and the flexible filter inner liner 2 expands and recovers, forming a trough. The crests and troughs alternate sequentially to form a peristaltic wave that propagates along the axial direction.

[0037] The sleeves 17 are arranged sequentially along the axial direction of the flexible filter inner liner 2, forming a segmented drive array. Through the suction of the second water pump and the selective on / off control of the solenoid valve, the water bladder 18 is pressurized and depressurized in sequence to drive the flexible filter inner liner 2 to deform. When water is injected into the water bladder 18, the water bladder 18 expands, and its expansion force is constrained by the sleeves 17, thereby applying radial extrusion force to the flexible filter inner liner 2, causing the corresponding flexible filter inner liner 2 to contract inward, thus forming a peak on the outside of the fish maw. Conversely, when water is pumped out of the water bladder 18, the water bladder 18 contracts, and the flexible filter inner liner 2 expands and recovers, forming a trough. By sequentially and alternately pressurizing and depressurizing multiple water bladder arrays 18, a continuous, smooth, and axially propagating peristaltic wave can be formed on the surface of the flexible filter inner liner 2.

[0038] The fluid replacement unit includes multiple third spray pipes 21 and third suction pipes 22, and both pipes are equipped with solenoid valves. One end of the third spray pipe 21 is connected to the output end of the second water pump, and one end of the third suction pipe 22 is connected to the inlet end of the second filter. The sleeve 17 has a drainage chamber 1701 and a suction chamber 1702 that are separated from each other, and both have openings facing the flexible filter inner liner 2. The drainage chamber 1701 is connected to the other end of the third spray pipe 21, and the suction chamber 1702 is connected to the other end of the third suction pipe 22. When the flexible filter inner liner 2 contracts inward, water containing impurities is extracted through the suction chamber 1702. When the flexible filter inner liner 2 expands and recovers, clean water is injected into it through the drainage chamber 1701.

[0039] The inlet of the second filter is also connected to the outlet of the sewage tank 6, and the input of the outlet device 7 is connected to the output of the second water pump.

[0040] By utilizing the contraction and expansion of the water bladder 18 as a driving mechanism, the crankshaft 9 structure is replaced, thus solving the problem of the crankshaft 9 structure being inconvenient to clean and maintain.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A filtration device for processing and producing ready-to-eat fish maw, comprising a soaking tank (1), characterized in that, The soaking tank (1) has a horizontally placed flexible filter inner liner (2) for containing fish maw. The two ends of the flexible filter inner liner (2) are respectively fixedly connected to the feed pipe (3) and the discharge pipe (4). The pipe bodies of the feed pipe (3) and the discharge pipe (4) pass through and are fixedly connected to the side walls of both ends of the soaking tank (1). The flexible filter inner liner (2) is provided with a peristaltic wave driving unit and a fluid replacement unit. The peristaltic wave driving unit is used to generate peristaltic waves that propagate along the axis on the flexible filter inner liner (2). The fluid replacement unit is used to perform water intake at the peak of the peristaltic wave and to perform sewage discharge at the trough of the peristaltic wave. A secondary separation device is provided below the discharge pipe (4). When the fish maw is discharged from the discharge pipe (4) along with the water under the action of the peristaltic wave, the secondary separation device separates the fish maw from the water and the impurities remaining in the water.

2. The ready-to-eat fish maw processing and filtration device according to claim 1, characterized in that, The flexible filter inner liner (2) is made of food-grade high-elasticity polymer material, and its inner wall is provided with multiple filter holes (201). The pore size of the filter holes (201) is suitable for allowing impurities and water to pass through, while blocking fish maw.

3. The ready-to-eat fish maw processing and filtration device according to claim 1, characterized in that, The secondary separation device includes a filter tank (5), a sewage tank (6) is provided below the filter tank (5), and a water outlet device (7) is provided above it. The bottom wall of the filter tank (5) is made of a screen with a wedge-shaped wire structure. The filter tank (5) includes an inclined part (501) and a storage part (502), which are connected. The inclined part (501) is inclined, with its highest point located directly below the discharge pipe (4) and its lowest point connected to the storage part (502). The storage part (502) is used to temporarily store the filtered fish maw. An overflow pipe (8) is also provided above the sewage tank (6). The overflow pipe (8) is connected to the overflow outlet opened on the side wall of the soaking pool (1). Excess water and impurities enter the overflow pipe (8) through the overflow outlet and flow into the sewage tank (6).

4. The ready-to-eat fish maw processing and filtration device according to claim 3, characterized in that, The peristaltic wave drive unit includes a crankshaft (9), with both ends of the crankshaft (9) rotatably connected to the inner walls of both ends of the soaking tank (1), and one end of the crankshaft (9) penetrating the soaking tank (1) and fixedly connected to the output end of a motor (10). The outer wall of the motor (10) is fixedly connected to the outer wall of the soaking tank (1). The connecting rod journal of the crankshaft (9) is rotatably connected to one end of a first connecting rod (11), and the other end of the first connecting rod (11) is rotatably connected to a second connecting rod (12). The top end of the second connecting rod (12) is fixed. A sleeve (13) is connected to the outer wall of the flexible filter inner liner (2). A support plate (14) is provided between the crankshaft (9) and the flexible filter inner liner (2). The two ends of the support plate (14) are respectively fixedly connected to the inner walls of the two ends of the soaking tank (1). Multiple sliding grooves (1401) corresponding to the second connecting rod (12) are opened on the plate body of the support plate (14). The rod body of the second connecting rod (12) passes through and slides in the sliding groove (1401).

5. The ready-to-eat fish maw processing and filtration device according to claim 4, characterized in that, The fluid replacement unit includes multiple first spray pipes (15) and first suction pipes (16), which are arranged in pairs and correspond one-to-one with the second connecting rod (12). The first spray pipe (15) is located above the flexible filter inner tank (2) and the water outlet faces the flexible filter inner tank (2). The first suction pipe (16) is located below the flexible filter inner tank (2) and the water outlet faces the flexible filter inner tank (2). The first spray pipe (15) is connected to the output end of the first water pump. The input end of the first water pump is connected to the outlet end of the first water tank. The inlet end of the first water tank is connected to the outlet end of the first filter. The inlet end of the first filter is connected to the first suction pipe (16).

6. The ready-to-eat fish maw processing and filtration device according to claim 5, characterized in that, The inlet of the first filter is also connected to the outlet of the sewage tank (6), and the input of the outlet device (7) is connected to the output of the first water pump.

7. The ready-to-eat fish maw processing and filtration device according to claim 3, characterized in that, The peristaltic wave driving unit includes multiple sleeves (17), which are evenly distributed and fitted onto the outside of the flexible filter inner liner (2). The outer wall of the sleeve (17) is fixedly connected to the inner wall of the soaking tank (1) via a bracket. The inner wall of the sleeve (17) and the outer wall of the flexible filter inner liner (2) are connected by a water bladder (18). The water inlet of the water bladder (18) is connected to the output end of the second water pump via a second spray pipe (19). The water outlet of the water bladder (18) is connected to the outlet of the second clean water tank via a second suction pipe (20). The water inlet of the second clean water tank is connected to the outlet of the second filter. The second suction pipe (20) is connected to the second spray pipe (19). Solenoid valves are installed on the pipe body of the water pipe (19). By the second water pump suction and the opening and closing of the solenoid valve, the water bladder (18) is pressurized and depressurized in sequence to drive the flexible filter inner liner (2) to deform. When water is injected into the water bladder (18) to pressurize it, the water bladder (18) expands. Its expansion force is constrained by the sleeve (17), which then applies radial extrusion force to the flexible filter inner liner (2) inward, causing the corresponding flexible filter inner liner (2) to contract inward, thereby forming a wave crest on the outside of the fish maw. When water is pumped out of the water bladder (18) to depressurize it, the water bladder (18) contracts, and the flexible filter inner liner (2) expands and recovers, forming a wave trough. The wave crest and wave trough alternate in sequence to form a peristaltic wave that propagates along the axis.

8. The ready-to-eat fish maw processing and filtration device according to claim 7, characterized in that, The fluid replacement unit includes multiple third spray pipes (21) and third pumping pipes (22), and both pipes are equipped with solenoid valves. One end of the third spray pipe (21) is connected to the output end of the second water pump, and one end of the third pumping pipe (22) is connected to the inlet end of the second filter. The sleeve (17) has a drainage chamber (1701) and a pumping chamber (1702) that are separated from each other, and both have an opening facing the flexible filter inner liner (2). The drainage chamber (1701) is connected to the other end of the third spray pipe (21), and the pumping chamber (1702) is connected to the other end of the third pumping pipe (22). When the flexible filter inner liner (2) contracts inward, water containing impurities is drawn out through the pumping chamber (1702). When the flexible filter inner liner (2) expands and recovers, clean water is injected into it through the drainage chamber (1701).

9. A filtration device for processing and producing ready-to-eat fish maw according to claim 8, characterized in that, The inlet of the second filter is also connected to the outlet of the sewage tank (6), and the input of the outlet device (7) is connected to the output of the second water pump.

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