Fish skin gelatin production line and production process

Abstract

The invention relates to the technical field of gelatin preparation, in particular to a fish skin gelatin production line and a production process. The fish skin gelatin production line comprises a pre-storage box used for pre-storing a solution mixed with Tween 80 and a deoiling unit communicated with the pre-storage box; the deoiling unit comprises an extrusion unit reciprocating in the horizontal direction and deoiling cavities formed in the two ends of the extrusion unit in the moving direction of the extrusion unit, the deoiling cavities are in a sealed state when a Tween-80 solution is injected, the deoiling cavities communicate with the pre-storage box, when one deoiling cavity is in an injection state, the extrusion unit gradually gets away from the deoiling cavity, and when the other deoiling cavity is in an injection state, the extrusion unit gradually gets away from the deoiling cavity. And meanwhile, the other oil removing cavity is extruded by the extrusion unit and discharges the Tween 80 solution adsorbed with the grease. According to the invention, the working process of waiting for discharging the used Tween-80 solution and then injecting the new Tween-80 solution is reduced, the production efficiency is improved, and meanwhile, a pickling gelatin extraction method is adopted, so that collagen in cod skin is prevented from being hydrolyzed.

Description

Technical Field

[0001] The invention relates to the technical field of gelatin preparation, in particular to a fish skin gelatin production line and a production process. Background Art

[0002] Gelatin is mostly produced through animal skins, including cod skin. A new type of gelatin edible gelatin production line proposed in patent application number CN202022461574.2 solves the problems of low production efficiency and high labor cost of edible glue. It includes a cold roller, a glue spraying system is provided above the cold roller, and the glue spraying system sprays glue on the curved surface of the cold roller; an inclined conveyor belt is provided at the lower left side of the cold roller, and a conveying channel is connected above the conveyor belt, and the conveying channel is composed of a multi-layer conveyor belt; a cutting machine is provided on the far right of the conveying channel, and the cutting machine is a structure for cutting edible glue into strips; However, there are still certain problems in the above scheme. After the colloid encounters the cold roller, it is solidified by cold, and then the scraper scrapes the solidified colloid down to the conveyor belt. After the scraper scrapes the colloid on the surface of the cold roller, a small amount of residual colloid is still easily attached to the surface of the cold roller. After the residual colloid accumulates too much, it affects the molding quality of the colloid on the surface of the cold roller.

[0003] Chinese patent CN216753478U discloses a novel edible gelatin production line, which includes a cold roller, a glue spraying mechanism arranged above the cold roller for spraying glue onto the surface of the cold roller, a scraper arranged on the cold roller for scraping off the colloid, a conveyor belt arranged below the cold roller, a drying chamber connected to the conveyor belt, and a cutting mechanism is arranged at the discharge port of the drying chamber, and a cleaning mechanism is arranged on the side of the cold roller for cleaning the surface of the cold roller.

[0004] Although the above scheme can avoid more gelatin remaining on the surface of the cold roller, in the preparation of gelatin, it is not only the case that gelatin will adhere to the surface of the cold roller. In addition, different animal skins use different processes when preparing gelatin. There are several production difficulties when using cod skin for gelatin production. First, cod skin has high fat content and needs to be degreased separately. Second, cod skin is very thin and cannot be fully expanded with alkali to allow a small amount of collagen to be hydrolyzed. Therefore, collagen extraction needs to be carried out under acidic conditions. Third, cod skin generally contains a large number of fins and has a high density. During the acid soaking and extraction process in the gelatin extraction pot, a large amount of aeration and turning is required. Otherwise, the acid soaking and heating are uneven. When degreasing the cod skin, the cod skin needs to be placed in a pre-prepared degreasing solution. However, after each batch of cod skin is degreased, it needs to be manually fished out and the emulsion mixed with cod oil needs to be discharged and a new degreasing solution needs to be re-prepared. The degreasing efficiency is slow and the output is low. Summary of the invention

[0005] In view of the above problems, a fish skin gelatin production line and a production process are provided. When degreasing cod skin, Tween 80 solution is first filled into one of the degreasing chambers, a feeding port is arranged at the upper part of the degreasing chamber, and a discharging port is arranged at the lower part of the degreasing chamber. After the degreasing chamber is filled with Tween 80 solution, the cod skin is put into the degreasing chamber. Within a rated time, the Tween 80 solution in the degreasing chamber degreasing the cod skin. After the degreasing is completed, the extrusion unit moves toward one side of the degreasing chamber filled with Tween 80 solution and extrudes the degreasing chamber. The volume of the extruded degreasing chamber is reduced, and the extruded degreasing chamber discharges the Tween 80 solution adsorbed with oil. At the same time, the volume of the other degreasing chamber becomes larger. This is Since the extrusion unit is located between the two degreasing chambers, when the extrusion unit squeezes one of the degreasing chambers, the extrusion unit can stretch the other degreasing chamber, so that the volume of the other degreasing chamber becomes larger, and the interior of the degreasing chamber with the increased volume is in a sealed state, thus forming a negative pressure. Under the action of the negative pressure, the degreasing chamber with the increased volume can absorb the new Tween 80 solution prepared in the pre-storage box, so that when one of the degreasing chambers discharges the Tween 80 solution adsorbed with oil, the other degreasing chamber can be simultaneously injected with new Tween 80 solution, which shortens the workflow of waiting for the used Tween 80 solution to be discharged and then injecting the new Tween 80 solution, thereby improving production efficiency.

[0006] In order to solve the problems of the prior art, the present invention provides a fish skin gelatin production line. The production steps along the production line sequentially include cleaning equipment, oil removal equipment, gelatin extraction equipment, filtering equipment, freezing compression equipment and crushing and packaging equipment. The oil removal equipment includes a fish skin crushing device, a pre-storage box for pre-storing a solution mixed with Tween 80 and an oil removal unit communicated with the pre-storage box. The oil removal unit includes an extrusion unit reciprocating in a horizontal direction and oil removal chambers respectively arranged at two ends of the extrusion unit along the moving direction of the extrusion unit. The oil removal chamber is in a sealed state when the Tween 80 solution is injected. The oil removal chamber is communicated with the pre-storage box. When one of the oil removal chambers is in an injection state, the extrusion unit gradually moves away from the oil removal chamber, and at the same time, the other oil removal chamber is squeezed by the extrusion unit and the Tween 80 solution adsorbed with grease is discharged.

[0007] Preferably, when one of the oil removal chambers discharges the Tween 80 solution adsorbed with grease, the extrusion unit squeezes the oil removal chamber, the volume of the oil removal chamber decreases, and the volume of the other oil removal chamber increases. The oil removal chamber forms a negative pressure due to the increase in volume, and the Tween 80 solution without adsorbing grease in the pre-storage box is sucked in.

[0008] Preferably, the oil removal chamber is composed of a bellows sleeve and a shell, the bellows sleeve is arranged at the end of the extrusion unit along the moving direction of the extrusion unit, and the shell is fixedly arranged at one end of the bellows sleeve away from the extrusion unit.

[0009] Preferably, a filter unit is provided in the degreasing chamber, the filter unit includes a filter screen, the filter screen divides the degreasing chamber into a solid storage chamber and a liquid storage chamber, the solid storage chamber is closer to the extrusion unit than the liquid storage chamber, and a drain port is provided on the liquid storage chamber. When the degreasing is completed, the drain port is opened, and the extrusion unit squeezes the degreasing chamber, and the Tween 80 solution adsorbed with oil is pressed into the liquid storage chamber and discharged from the drain port.

[0010] Preferably, a feed port is provided at the upper portion of the solid storage chamber, and a discharge port is provided at the lower portion of the solid storage chamber. Before degreasing the degreasing chamber, the feed port is opened and the discharge port is closed, and the cod skin is put into the degreasing chamber through the feed port. When the degreasing chamber is degreasing, the states of the feed port and the discharge port remain unchanged. When degreasing is completed, the feed port is closed, the extrusion unit squeezes the degreasing chamber, and the discharge port is opened to discharge the Tween 80 solution adsorbed with oil. Subsequently, the discharge port is closed and the discharge port is opened to discharge the cod skin in the solid storage chamber.

[0011] Preferably, a first switch valve is provided on the side wall of the liquid storage chamber. When the degreasing chamber is squeezed to the minimum volume by the extrusion unit, the Tween 80 solution adsorbed with oil in the degreasing chamber is discharged, the first switch valve is opened, and the discharge port is closed at the same time. The feed port and the discharge port are both closed, and the extrusion unit moves in the opposite direction to increase the volume of the degreasing chamber. The first switch valve introduces air into the liquid storage chamber, and the air passes through the filter screen into the solid storage chamber. The first switch valve is closed after being opened for a specified preset time, and then the discharge port is opened.

[0012] Preferably, a connecting pipe is provided between the degreasing chamber and the pre-storage tank to connect the two, and a second switch valve and a one-way valve are sequentially provided on the connecting pipe. The second switch valve is closed synchronously when the first switch valve is opened, and the second switch valve is opened after the first switch valve is closed, so that the Tween 80 solution pre-stored in the pre-storage tank can flow into the degreasing chamber through the one-way valve.

[0013] Preferably, the extrusion unit includes an extrusion shell that can move toward the deoiling chamber and an extrusion block arranged in the extrusion shell and sliding along the moving direction of the extrusion shell. One end of the extrusion block can extend from one end of the extrusion shell. When the extrusion block extends from the extrusion shell, the deoiling chamber reaches the minimum volume.

[0014] Preferably, an extrusion ring is fixedly provided on the periphery of the extrusion block, and the extrusion ring is slidably provided in the extrusion shell and divides the extrusion shell into a first air cavity and a second air cavity. An air delivery unit is provided between the first air cavity and the second air cavity, and the air delivery unit can deliver the air in the first air cavity to the second air cavity, or deliver the air in the second air cavity to the first air cavity. When the air in the first air cavity decreases, the extrusion ring moves toward the first air cavity, and when the air in the second air cavity decreases, the extrusion ring moves toward the second air cavity.

[0015] The present invention also relates to a fish skin gelatin production process, which adopts a fish skin gelatin production line, and the specific steps are as follows: S1. Clean the fish skin.

[0016] S2. Soak the fish skin in a 0.2% Tween 80 solution to remove oil. Put the cod skin into one of the degreasing chambers. The Tween 80 solution in the degreasing chamber is used to soak the cod skin to remove oil. After the soaking is completed, the used Tween 80 solution is discharged first, and the degreasing chamber on the other side of the extrusion unit can simultaneously absorb new Tween 80 solution.

[0017] S3, soak the fish skin in 0.05% sodium hydroxide solution for 8 hours to allow the fish skin to swell.

[0018] S4, cleaning the fish skin so that the pH value of the fish skin is reduced to pH 10.

[0019] S5. The fish skin is transported to the rubber extracting pot through a pipeline, and purified water is added to the rubber extracting pot at a ratio of 1:4.

[0020] S6, add sulfuric acid to adjust the pH value to 4, acid method rubber extraction, while adding acid, the fish skin is stirred by aeration.

[0021] S7. Filter, sterilize, concentrate, freeze, dry, crush and package the solution after extraction.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adjusts the pH value by adding sulfuric acid, and aerates and stirs the fish skin while adding acid, so that the collagen in the fish skin can be better extracted.

[0023] 2. When degreasing cod skin, the present invention first fills one of the degreasing chambers with Tween 80 solution, the upper part of the degreasing chamber is provided with a feeding port, and the lower part of the degreasing chamber is provided with a discharging port. After the degreasing chamber is filled with Tween 80 solution, the cod skin is put into the degreasing chamber. Within a rated time, the Tween 80 solution in the degreasing chamber degreasing the cod skin. After the degreasing is completed, the squeezing unit moves toward the side of the degreasing chamber filled with Tween 80 solution and squeezes the degreasing chamber. The volume of the squeezed degreasing chamber is reduced, and the squeezed degreasing chamber discharges the Tween 80 solution adsorbed with oil. At the same time, the volume of the other degreasing chamber becomes larger. This is because the squeezing unit is located between the two degreasing chambers. When the extrusion unit squeezes one of the deoiling chambers, the extrusion unit can stretch the other deoiling chamber, so that the volume of the other deoiling chamber becomes larger, and the interior of the deoiling chamber with the increased volume is in a sealed state, thus forming a negative pressure. Under the action of the negative pressure, the deoiling chamber with the increased volume can absorb the new Tween 80 solution prepared in the pre-storage box, so that when one of the deoiling chambers discharges the Tween 80 solution adsorbed with oil, the other deoiling chamber can be injected with new Tween 80 solution simultaneously, which shortens the workflow of waiting for the used Tween 80 solution to be discharged and then injecting the new Tween 80 solution, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of a fish skin gelatin production line.

[0025] Figure 2 Is a fish skin gelatin production line Figure 1 A local enlarged schematic diagram of point A in the middle.

[0026] Figure 3 Is a fish skin gelatin production line Figure 1 A local enlarged schematic diagram of point B in the middle.

[0027] Figure 4 It is a side view of a fish skin gelatin production line.

[0028] Figure 5 Is a fish skin gelatin production line Figure 4 Schematic cross-sectional view at CC in the middle.

[0029] Figure 6 Is a fish skin gelatin production line Figure 5 A partial enlarged schematic diagram of point D in the middle.

[0030] Figure 7 It is a cutaway stereoscopic schematic diagram of a fish skin gelatin production line.

[0031] Figure 8 Is a fish skin gelatin production line Figure 7 A partial enlarged schematic diagram of point E in the middle.

[0032] Fig. 9 Is a fish skin gelatin production line Figure 7 A partial enlarged schematic diagram of point F in the middle.

[0033] Fig.10 It is a three-dimensional schematic diagram of a fish skin gelatin production line after removing the pre-storage box.

[0034] Fig.11 It is a three-dimensional schematic diagram of a fish skin gelatin production line with the extrusion unit and corrugated sleeve removed.

[0035] The numbers in the figure are: 1. Pre-storage box; 11. Second switch valve; 12. Connecting pipe; 13. Check valve; 14. Third switch valve; 2. Degreasing unit; 21. Extrusion unit; 211. Extrusion shell; 212. Extrusion block; 213. Driving unit; 2131. Second rotary driver; 2132. Threaded rod; 2133. Guide rod; 214. First air cavity; 215. Second air cavity; 216. Air delivery unit; 2161. Air delivery pipe; 2162. Pump body ; 217, extrusion ring; 22, degreasing chamber; 221, corrugated sleeve; 2211, support rod; 222, shell; 2221, feed inlet; 2222, discharge port; 2223, first rotary drive; 2224, gear; 2225, arc plate; 23, filter unit; 231, solid storage chamber; 232, liquid storage chamber; 233, drain port; 234, filter screen; 24, first switch valve; 3, aeration pipe; 31, air pump. DETAILED DESCRIPTION

[0036] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] Reference Figure 1 , Figure 4 and Figure 5 The invention discloses a fish skin gelatin production line, wherein the production steps along the production line sequentially include a cleaning device, an oil removal device, a gelatin extraction device, a filtering device, a freezing and compressing device, and a crushing and packaging device; the oil removal device includes a fish skin crushing device, a pre-storage box 1 for pre-storing a solution mixed with Tween 80, and an oil removal unit 2 communicated with the pre-storage box 1; the oil removal unit 2 includes an extrusion unit 21 which reciprocates in a horizontal direction and oil removal chambers 22 which are respectively arranged at two ends of the extrusion unit 21 along the moving direction of the extrusion unit 21; the oil removal chamber 22 is in a sealed state when the Tween 80 solution is injected; the oil removal chamber 22 is communicated with the pre-storage box 1; when one of the oil removal chambers 22 is in an injection state, the extrusion unit 21 gradually moves away from the oil removal chamber 22, and at the same time, the other oil removal chamber 22 is squeezed by the extrusion unit 21 and the Tween 80 solution adsorbed with grease is discharged.

[0038] Chinese patent CN216753478U discloses a novel edible gelatin production line. The production equipment corresponding to the cleaning equipment, gelatin extraction equipment, filtering equipment, freezing and compression equipment and crushing and packaging equipment are all existing equipment, so they are not described here. The present invention mainly improves the equipment used in the degreasing equipment. Before degreasing the cod skin, the cod skin needs to be put into the fish skin crushing device for crushing and then put into the degreasing unit 2. The fish skin crushing device is a prior art and is not described here. In the traditional degreasing process, before degreasing the cod skin, it is necessary to first fill a container with Tween 80 solution, and then put it into the degreasing unit 2. The cod skin is put in, and after the oil is completely removed, the Tween 80 solution absorbs the oil in the cod skin. If the next batch of cod skin needs to be degreased, the Tween 80 solution adsorbed with oil in the container needs to be discharged and replaced with a new Tween 80 solution. When the used Tween 80 solution is discharged, a new Tween 80 solution cannot be injected, and the traditional speed of injecting Tween 80 solution is slow, and time cannot be reasonably used, resulting in reduced efficiency. The present invention can overcome the above problems by providing a degreasing unit 2. Two degreasing chambers 22 are provided on both sides of the extrusion unit 21. When the cod skin is degreased, the Tween 80 solution is first filled into one of the degreasing chambers 22, and the degreasing chamber is filled with a plurality of degreasing chambers. The upper part of the degreasing chamber 22 is provided with a feeding port, and the lower part of the degreasing chamber 22 is provided with a discharging port 2222. After the degreasing chamber 22 is filled with Tween 80 solution, the cod skin is put into the degreasing chamber 22. Within the rated time, the Tween 80 solution in the degreasing chamber 22 degreasing the cod skin. After the degreasing is completed, the squeezing unit 21 moves toward the side of the degreasing chamber 22 filled with Tween 80 solution and squeezes the degreasing chamber 22. The volume of the squeezed degreasing chamber 22 is reduced, and the squeezed degreasing chamber 22 discharges the Tween 80 solution adsorbed with oil. At the same time, the volume of the other degreasing chamber 22 becomes larger. This is because the squeezing unit 21 is located between the two degreasing chambers 22. The squeezing unit 21 has a large volume. When one of the degreasing chambers 22 is squeezed, the squeezing unit 21 can stretch the other degreasing chamber 22, so that the volume of the other degreasing chamber 22 becomes larger, and the interior of the degreasing chamber 22 with the increased volume is in a sealed state, thus forming a negative pressure. Under the action of the negative pressure, the degreasing chamber 22 with the increased volume can absorb the new Tween 80 solution prepared in the pre-storage box 1, so that when one of the degreasing chambers 22 discharges the Tween 80 solution adsorbed with oil, the other degreasing chamber 22 can be simultaneously injected with new Tween 80 solution, which shortens the workflow of waiting for the used Tween 80 solution to be discharged and then injecting the new Tween 80 solution, thereby improving production efficiency.

[0039] Reference Figure 1-Figure 11When one of the degreasing chambers 22 discharges the Tween 80 solution adsorbed with grease, the squeezing unit 21 squeezes the degreasing chamber 22, the volume of the degreasing chamber 22 decreases, and the volume of the other degreasing chamber 22 increases. The degreasing chamber 22 forms a negative pressure due to the increase in volume, and absorbs the Tween 80 solution without adsorbing grease in the pre-storage box 1.

[0040] Reference Figure 7 and Fig.10 The degreasing chamber 22 is composed of a bellows sleeve 221 and a shell 222. The bellows sleeve 221 is arranged at the end of the extrusion unit 21 along the moving direction of the extrusion unit 21, and the shell 222 is fixedly arranged at one end of the bellows sleeve 221 away from the extrusion unit 21.

[0041] A circle of support rods 2211 is arranged on the periphery of the bellows sleeve 221, and the extension direction of the support rods 2211 is parallel to the axial direction of the bellows sleeve 221. The annular structure formed by the circle of support rods 2211 provides support for the bellows sleeve 221. This is because the degreasing chamber 22 is composed of the bellows sleeve 221 and the shell 222, and the main part of the degreasing chamber 22 is mainly composed of the bellows sleeve 221, that is, when the degreasing chamber 22 is filled with Tween 80 solution, the bellows sleeve 221 is in an elongated state and the mass of the Tween 80 solution all acts on the bellows sleeve 221. If a circle of support rods 2211 is not arranged on the periphery of the bellows sleeve 221, the bellows sleeve 221 is easily bent by the Tween 80 solution, thereby causing damage to the connection between the bellows sleeve 221 and the shell 222. The same problem will also occur between the bellows sleeve 221 and the extrusion unit 21. After the support rods 2211 are arranged, the above situation can be avoided.

[0042] Reference Figure 6 and Figure 7 : A filter unit 23 is arranged in the degreasing chamber 22, and the filter unit 23 includes a filter net 234. The filter net 234 divides the degreasing chamber 22 into a solid storage chamber 231 and a liquid storage chamber 232. The solid storage chamber 231 is closer to the extrusion unit 21 than the liquid storage chamber 232. The liquid storage chamber 232 is provided with a drain port 233. When degreasing is completed, the drain port 233 is opened, and the extrusion unit 21 squeezes the degreasing chamber 22. The Tween 80 solution adsorbed with oil is pressed into the liquid storage chamber 232 and discharged from the drain port 233.

[0043] Reference Figure 2 and Figure 9-11: A feed port 2221 is provided at the upper portion of the solid storage chamber 231, and a discharge port 2222 is provided at the lower portion of the solid storage chamber 231. Before the degreasing chamber 22 is degreased, the feed port 2221 is opened and the discharge port 2222 is closed, and the cod skin is put into the degreasing chamber 22 through the feed port 2221. When the degreasing chamber 22 is degreasing, the states of the feed port 2221 and the discharge port 2222 remain unchanged. When the degreasing is completed, the feed port 2221 is closed, the extrusion unit 21 squeezes the degreasing chamber 22, and the drain port 233 is opened to discharge the Tween 80 solution adsorbed with oil, and then the drain port 233 is closed, and the discharge port 2222 is opened to discharge the cod skin in the solid storage chamber 231.

[0044] The feed port 2221 and the discharge port 2222 are both provided with switch units for controlling the switches thereof, the switch units comprising a first rotation driver 2223, a gear 2224 and an arc plate 2225, the shell 222 is a cylindrical structure, the arc plate 2225 is rotatably arranged on the periphery of the shell 222 around the axis of the shell 222, taking the feed port 2221 as an example, when the arc plate 2225 rotates to the feed port 2221, the feed port 2221 is in a closed state, meshing teeth are evenly provided on the arc plate 2225, and the meshing teeth are arranged around the axis of the arc plate 2225, the gear 2224 is rotatably arranged on one side of the arc plate 2225, and the gear 2224 is meshed with the meshing teeth on the arc plate 2225, the first rotation driver 2223 is arranged at the end of the gear 2224, the first rotation driver 2223 drives the arc plate 2225 to rotate by driving the gear 2224, and the first rotation driver 2223 is preferably a servo motor.

[0045] Reference Figure 7 and Fig.10 : A first switch valve 24 is provided on the side wall of the liquid storage chamber 232. When the degreasing chamber 22 is squeezed to the minimum volume by the squeezing unit 21, the Tween 80 solution adsorbed with oil in the degreasing chamber 22 is discharged, the first switch valve 24 is opened, and the drain port 233 is closed at the same time. The feed port 2221 and the discharge port 2222 are both closed. The squeezing unit 21 moves in the opposite direction and increases the volume of the degreasing chamber 22. The first switch valve 24 introduces air into the liquid storage chamber 232. The air passes through the filter screen 234 and enters the solid storage chamber 231. The first switch valve 24 is closed after being opened for a specified preset time, and then the discharge port 2222 is opened.

[0046] After the degreasing chamber 22 is degreased and the used Tween 80 solution is discharged, the drain port 233 is closed and the first switch valve 24 is opened. Then the extrusion unit 21 moves in the opposite direction to gradually increase the volume of the degreasing chamber 22. In this way, the outside air can enter the liquid storage chamber 232 through the first switch valve 24, and the air in the liquid storage chamber 232 can pass through the filter 234 and enter the solid storage chamber 231. In this way, part of the cod skin adhered to the filter 234 can be detached from the filter 234. After reaching the specified preset time, it is closed, and then the discharge port 2222 is opened. At the same time, the extrusion unit 21 stops moving, and the cod skin in the solid storage chamber 231 is discharged from the discharge port 2222. It is worth noting that even if the degreasing chamber 22 is squeezed to the minimum volume, the cod skin in the degreasing chamber 22 will not completely fill the degreasing chamber 22, thereby avoiding the extrusion unit 21 from completely pressing the cod skin on the filter net 234 to break the cod skin, thereby avoiding the cod skin from entering the liquid storage chamber 232 due to breaking, causing unnecessary material loss.

[0047] Reference Figure 1 , Figure 3 and Figure 4 A connecting pipe 12 is provided between the degreasing chamber 22 and the pre-storage tank 1 to connect the two. A second switch valve 11 and a one-way valve 13 are sequentially provided on the connecting pipe 12. The second switch valve 11 is synchronously closed when the first switch valve 24 is opened. The second switch valve 11 is opened after the first switch valve 24 is closed. The Tween 80 solution pre-stored in the pre-storage tank 1 can flow into the degreasing chamber 22 through the one-way valve 13.

[0048] After the second switch valve 11 is closed, the discharge port 2222 is opened, and the cod skin is discharged from the discharge port 2222. The extrusion unit 21 is in a non-moving state at this time. When the discharge port 2222 has discharged all the cod skin, the discharge port 2222 is closed, the second switch valve 11 is opened, and the extrusion unit 21 continues to move so that the volume of the degreasing chamber 22 becomes larger. At this time, the Tween 80 solution in the pre-storage box 1 flows into the degreasing chamber 22 through the connecting pipe 12. The third switch valve 14 is provided on the side wall of the pre-storage box 1. After the injection of the Tween 80 solution into the degreasing chamber 22 is completed, the pre-storage box 1 is in an empty warehouse state. The third switch valve 14 is opened to inject water and Tween 80 solution into the pre-storage box 1 according to a preset ratio. The time for degreasing the cod skin by the degreasing chamber 22 is used to complete the proportioning of the Tween 80 solution in the pre-storage box 1, thereby saving time.

[0049] Reference Figure 7 , Figure 8 and Fig.10The extrusion unit 21 includes an extrusion shell 211 that can move toward the degreasing chamber 22 and an extrusion block 212 that is arranged in the extrusion shell 211 and slides along the moving direction of the extrusion shell 211. One end of the extrusion block 212 can extend from one end of the extrusion shell 211. When the extrusion block 212 extends from the extrusion shell 211, the degreasing chamber 22 reaches the minimum volume.

[0050] A driving unit 213 for driving the extruded shell 211 to move is provided on one side of the extruded shell 211. The driving unit 213 includes a second rotation driver 2131, a threaded rod 2132 and a guide rod 2133. The threaded rod 2132 penetrates the extruded shell 211 along the moving direction of the extruded shell 211 and is threadedly matched with the extruded shell 211. The guide rod 2133 is arranged on one side of the threaded rod 2132 in parallel along the extending direction of the threaded rod 2132. The guide rod 2133 penetrates the extruded shell 211. The guide rod 2133 The second rotary driver 2131 is slidably matched with the extrusion shell 211, and the second rotary driver 2131 is arranged at the end of the threaded rod 2132. The second rotary driver 2131 is preferably a servo motor. When the second rotary driver 2131 drives the threaded rod 2132 to rotate, the extrusion shell 211 moves. When the corrugated sleeve 221 is fully compressed, the extrusion shell 211 stops moving, and then the extrusion block 212 extends from the extrusion shell 211, so that the degreasing chamber 22 is compressed to the minimum volume, ensuring that the Tween 80 solution adsorbed with grease can be completely discharged.

[0051] Reference Figure 1 , Figure 8 , Fig. 9 and Fig.10 : An extrusion ring 217 is fixedly arranged on the periphery of the extrusion block 212. The extrusion ring 217 is slidably arranged in the extrusion shell 211 and divides the extrusion shell 211 into a first air cavity 214 and a second air cavity 215. An air delivery unit 216 is arranged between the first air cavity 214 and the second air cavity 215. The air delivery unit 216 can deliver the air in the first air cavity 214 to the second air cavity 215, or deliver the air in the second air cavity 215 to the first air cavity 214. When the air in the first air cavity 214 decreases, the extrusion ring 217 moves toward the first air cavity 214. When the air in the second air cavity 215 decreases, the extrusion ring 217 moves toward the second air cavity 215.

[0052] The delivery unit includes an air delivery pipe 2161 and a pump body 2162. The two ends of the air delivery pipe 2161 are respectively connected to the first air cavity 214 and the second air cavity 215. The pump body 2162 is arranged on the air delivery pipe 2161. Since the extrusion ring 217 is fixedly arranged on the extrusion block 212, when the volume of the first air cavity 214 and the second air cavity 215 changes, the extrusion ring 217 can slide in the extrusion shell 211, and the extrusion ring 217 drives the extrusion block 212 to move. The purpose of setting the extrusion block 212 is that the size of the extrusion shell 211 is large, and when the corrugated sleeve 221 is extruded The extrusion block 212 is smaller in size and can be inserted into the extrusion shell 211, thereby improving the extrusion effect on the degreasing chamber 22, so that the Tween 80 solution adsorbed with oil can be quickly discharged. An aeration pipe 3 is provided along the extension direction of the degreasing unit 2. The aeration pipe 3 is started after the cod skin is put into the degreasing chamber 22. An air pump 31 for supplying air to the aeration pipe 3 is provided at the end of the aeration pipe 3. Under the action of aeration, the cod skin in the degreasing chamber 22 can be driven to roll in the degreasing chamber 22, thereby improving the degreasing effect of the cod skin.

[0053] Reference Figure 1-Figure 11 The present invention also relates to a fish skin gelatin production process, which adopts a fish skin gelatin production line, and the specific steps are as follows: S1. Clean the fish skin.

[0054] S2, soaking the fish skin with a 0.2% Tween 80 solution to remove oil, putting the cod skin into one of the degreasing chambers 22, the Tween 80 solution in the degreasing chamber 22 is used to soak the cod skin to remove oil, and after the soaking is completed, the used Tween 80 solution is first discharged, and the degreasing chamber 22 on the other side of the extrusion unit 21 can synchronously absorb new Tween 80 solution.

[0055] S3, soak the fish skin in 0.05% sodium hydroxide solution for 8 hours to allow the fish skin to swell.

[0056] S4, cleaning the fish skin so that the pH value of the fish skin is reduced to pH 10.

[0057] S5. The fish skin is transported to the rubber extracting pot through a pipeline, and purified water is added to the rubber extracting pot at a ratio of 1:4.

[0058] S6, add sulfuric acid to adjust the pH value to 4, acid method rubber extraction, while adding acid, the fish skin is stirred by aeration.

[0059] S7. Filter, sterilize, concentrate, freeze, dry, crush and package the solution after extraction.

[0060] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A fish skin gelatin production line, wherein the production steps along the production line sequentially include a cleaning device, an oil removal device, a gelatin extraction device, a filtering device, a freezing and compression device, and a crushing and packaging device; It is characterized in that The degreasing device comprises a fish skin crushing device, a pre-storage box (1) for pre-storing a solution mixed with Tween 80, and a degreasing unit (2) communicated with the pre-storage box (1). The degreasing unit (2) comprises an extrusion unit (21) which moves back and forth in a horizontal direction, and degreasing chambers (22) which are respectively arranged at two ends of the extrusion unit (21) along the moving direction of the extrusion unit (21). The degreasing chamber (22) is in a sealed state when the Tween 80 solution is injected. The degreasing chamber (22) is communicated with the pre-storage box (1). When one of the degreasing chambers (22) is in an injection state, the extrusion unit (21) gradually moves away from the degreasing chamber (22), while the other degreasing chamber (22) is squeezed by the extrusion unit (21) and the Tween 80 solution adsorbed with fat is discharged.

2. A fish skin gelatin production line according to claim 1, characterized in that: When one of the degreasing chambers (22) discharges the Tween 80 solution adsorbed with grease, the squeezing unit (21) squeezes the degreasing chamber (22), thereby reducing the volume of the degreasing chamber (22) and increasing the volume of the other degreasing chamber (22). The degreasing chamber (22) forms a negative pressure due to the increase in volume, thereby sucking in the Tween 80 solution not adsorbed with grease in the pre-storage box (1).

3. A fish skin gelatin production line according to claim 1, characterized in that, The oil removal chamber (22) is composed of a bellows sleeve (221) and a shell (222); the bellows sleeve (221) is arranged at the end of the extrusion unit (21) along the moving direction of the extrusion unit (21); and the shell (222) is fixedly arranged at one end of the bellows sleeve (221) away from the extrusion unit (21).

4. A fish skin gelatin production line according to claim 1, characterized in that: A filter unit (23) is arranged in the degreasing chamber (22). The filter unit (23) comprises a filter net (234). The filter net (234) divides the degreasing chamber (22) into a solid storage chamber (231) and a liquid storage chamber (232). The solid storage chamber (231) is closer to the extrusion unit (21) than the liquid storage chamber (232). A liquid discharge port (233) is arranged on the liquid storage chamber (232). When degreasing is completed, the liquid discharge port (233) is opened, and the extrusion unit (21) extrudes the degreasing chamber (22). The Tween 80 solution adsorbed with oil is pressed into the liquid storage chamber (232) and discharged from the liquid discharge port (233).

5. A fish skin gelatin production line according to claim 4, characterized in that: The upper portion of the solid storage chamber (231) is provided with a feed port (2221), and the lower portion of the solid storage chamber (231) is provided with a discharge port (2222). Before the degreasing chamber (22) is degreasing, the feed port (2221) is opened and the discharge port (2222) is closed, and the cod skin is put into the degreasing chamber (22) through the feed port (2221). When the degreasing chamber (22) is degreasing, the states of the feed port (2221) and the discharge port (2222) remain unchanged. When the degreasing is completed, the feed port (2221) is closed, the extrusion unit (21) extrudes the degreasing chamber (22), and the discharge port (233) is opened to discharge the Tween 80 solution adsorbed with oil. Subsequently, the discharge port (233) is closed and the discharge port (2222) is opened to discharge the cod skin in the solid storage chamber (231).

6. A fish skin gelatin production line according to claim 5, characterized in that: A first switch valve (24) is arranged on the side wall of the liquid storage chamber (232). When the degreasing chamber (22) is squeezed to a minimum volume by the squeezing unit (21), the Tween 80 solution adsorbed with oil in the degreasing chamber (22) is completely drained, the first switch valve (24) is opened, and at the same time the liquid discharge port (233) is closed, the feed port (2221) and the discharge port (2222) are both closed, the squeezing unit (21) moves in the reverse direction and increases the volume of the degreasing chamber (22), the first switch valve (24) introduces air into the liquid storage chamber (232), the air passes through the filter screen (234) and enters the solid storage chamber (231), the first switch valve (24) is opened for a specified preset time and then closed, and then the discharge port (2222) is opened.

7. A fish skin gelatin production line according to claim 6, characterized in that: A connecting pipe (12) is provided between the degreasing chamber (22) and the pre-storage box (1) to connect the two. A second switch valve (11) and a one-way valve (13) are provided in sequence on the connecting pipe (12). The second switch valve (11) is closed synchronously when the first switch valve (24) is opened. The second switch valve (11) is opened after the first switch valve (24) is closed. The Tween 80 solution pre-stored in the pre-storage box (1) can flow into the degreasing chamber (22) through the one-way valve (13).

8. A fish skin gelatin production line according to claim 6, characterized in that: The extrusion unit (21) comprises an extrusion shell (211) that can move toward the oil removal chamber (22) and an extrusion block (212) that is arranged in the extrusion shell (211) and slides along the moving direction of the extrusion shell (211); one end of the extrusion block (212) can extend from one end of the extrusion shell (211); when the extrusion block (212) extends from the extrusion shell (211), the oil removal chamber (22) reaches a minimum volume.

9. A fish skin gelatin production line according to claim 8, characterized in that: An extrusion ring (217) is fixedly arranged on the periphery of the extrusion block (212). The extrusion ring (217) is slidably arranged in the extrusion shell (211) and divides the extrusion shell (211) into a first air cavity (214) and a second air cavity (215). An air delivery unit (216) is arranged between the first air cavity (214) and the second air cavity (215). The air delivery unit (216) can deliver air in the first air cavity (214) to the second air cavity (215), or deliver air in the second air cavity (215) to the first air cavity (214). When the air in the first air cavity (214) decreases, the extrusion ring (217) moves toward the first air cavity (214), and when the air in the second air cavity (215) decreases, the extrusion ring (217) moves toward the second air cavity (215).

10. A fish skin gelatin production process, using a fish skin gelatin production line according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: S1, cleaning fish skin; S2, soaking the fish skin in a 0.2% Tween 80 solution to remove oil, putting the cod skin into one of the degreasing chambers (22), and soaking the cod skin in the Tween 80 solution in the degreasing chamber (22) to remove oil, and after the soaking is completed, the used Tween 80 solution is discharged first, and the degreasing chamber (22) on the other side of the extrusion unit (21) can simultaneously absorb new Tween 80 solution; S3, use content are 0.05% sodium hydroxide solution soaked fish skin 8 hours, allow fish skin expand; S4, the fish skin is cleaned so that the pH value of the fish skin is reduced to pH 10; S5, fish skin are transported to the glue pot by pipeline, and in the glue pot, purified water is added in 1:4 ratio; S6, add sulfuric acid that pH value is adjusted to PH4, acid method glue is carried out, and fish skin is stirred by aeration while adding acid; S7. Filter, sterilize, concentrate, freeze, dry, crush and package the solution after extraction.

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