Preparation equipment and method of tiger skin and runny heart egg

Abstract

The application discloses a preparation equipment and method of tiger skin runny heart eggs, and relates to the technical field of egg products. The equipment comprises a frying box, an oil groove in the interior, an electric heating wire at the bottom of the oil groove, a top cover body installed on the top of the frying box, a plurality of fixed frames installed in the oil groove and inclined on the upper surface, a switching frame with the same structure as the fixed frame, located between the fixed frames and arranged at intervals with the fixed frames, two ends of the switching frame being fixedly provided with lifting plates, the top ends of the two lifting plates of the same switching frame being fixedly provided with the same horizontal plate, the horizontal plate being overlapped in the top cover body and being driven by a driving assembly to move up and down, and the frame body closest to the discharge port of the oil groove in the feeding direction belonging to the switching frame. The switching frame is a discharging frame, and the discharging frame is also driven by the driving assembly to move up and down. The application has the effects of improving the frying effect of the tiger skin runny heart eggs and the quality after frying.

Description

Technical Field

[0001] This application relates to the technical field of egg products, and in particular to a preparation device and method for making tiger-skin soft-boiled eggs. Background Technology

[0002] Tiger-skin eggs are a type of food made by boiling eggs until they are firm, peeling them, and then deep-frying them to create a crispy outer layer. Soft-boiled tiger-skin eggs are made by controlling the temperature to ensure the yolk remains runny and runny; they are typically made with chicken or quail eggs.

[0003] The process of making tiger-skin soft-boiled eggs is more demanding than that of regular soft-boiled eggs. In addition to boiling and braising, tiger-skin soft-boiled eggs also need to be deep-fried to form the tiger-skin pattern. However, if the oil temperature is too high during the frying process, the yolk will solidify and fail to form a soft-boiled center, while if the oil temperature is too low, the tiger-skin pattern will not form well. The frying time is also crucial.

[0004] In the industrial production of tiger-skin eggs, the eggs undergo processes such as boiling, shelling, frying, and braising. The frying process typically utilizes automated frying lines. These lines generally include an oil tank, heating wires, an oil residue conveyor line, a mesh conveyor belt, and a top fume extraction hood. The oil residue conveyor line is located below the mesh conveyor belt, which slopes upwards at its end, transitioning to the discharge port of the automated frying equipment. While automated frying lines can automate the production of tiger-skin eggs, some of the crispy outer layer from the eggs adheres to the conveyor belt during frying, leading to inconsistent quality. Furthermore, because tiger-skin soft-boiled eggs require high temperatures, using existing automated frying lines results in uneven heating of the eggs, leading to inconsistent tiger-skin quality or some eggs failing to develop a soft-boiled center. Therefore, existing automated frying lines cannot be directly used for tiger-skin soft-boiled egg production, as this would result in a high defect rate. Summary of the Invention

[0005] In order to improve the high defect rate of existing automated frying line equipment when frying tiger-skin soft-boiled eggs, this application provides a preparation equipment and method for tiger-skin soft-boiled eggs.

[0006] The equipment for preparing tiger-skin soft-boiled eggs provided in this application adopts the following technical solution:

[0007] A device for preparing tiger-skin soft-boiled eggs, including...

[0008] The fryer box has an oil tank inside that holds cooking oil. The bottom of the oil tank is equipped with heating wires. The feeding direction is from the fryer box inlet to the fryer box outlet.

[0009] The top cover is installed on top of the fryer and connected to the negative pressure fan to extract the oil fumes generated by the fryer.

[0010] The fixed frame consists of multiple long strips and is installed in the oil tank. The upper surface is inclined from top to bottom in the feeding direction, allowing the oil to flow normally through the fixed frame. However, the hard-boiled eggs cannot pass through the fixed frame from top to bottom, and the hard-boiled eggs on the fixed frame are completely submerged in oil.

[0011] The switching frame has the same structure as the fixed frame and is located between the fixed frames with intervals. Lifting plates are fixed at both ends. The top of the two lifting plates of the same switching frame is fixed with the same horizontal plate. The horizontal plate overlaps the top cover. The top cover is equipped with a drive component that drives multiple horizontal plates to move up and down simultaneously. The highest point of the upper surface of the switching frame can be moved down to below the inclined surface of the adjacent fixed frame away from the feeding direction. The lowest point of the upper surface of the switching frame can be moved up to above the plane where the top of the adjacent fixed frame is located in the feeding direction.

[0012] Vertical plates, two in a group, or multiple groups, are installed on the top cover. Horizontal plates slide vertically between two vertical plates in a group.

[0013] The frame closest to the oil tank outlet in the feeding direction is the switching frame, which is the unloading frame. The unloading frame is also driven up and down by the drive component. The unloading frame moves down to the same position as the switching frame. The unloading frame is extended in the vertical direction. The unloading frame can move up to a position where the bottom of the inclined surface of its upper surface is above the oil tank outlet. At this time, the unloading frame is not completely above the adjacent fixed frame.

[0014] Optionally, the frame of the fixed frame is composed of a vertical frame made of multiple metal wires connected together.

[0015] Optionally, a fixing plate is fixed at both ends of the fixing frame. The fixing plate extends upward and is fixedly connected to the top cover. The blasting box is equipped with multiple first telescopic cylinders. The piston rod of the first telescopic cylinder is set vertically upward and installed at the bottom of the top cover. The first telescopic cylinder can make the top cover move vertically upward.

[0016] Optionally, the drive assembly includes a second telescopic cylinder, a switching bar, a first protrusion, and a second protrusion;

[0017] The second telescopic cylinder is set horizontally and installed inside the top cover;

[0018] The switching bar is horizontally mounted inside the top cover and is slidably connected to the top cover. The sliding direction is parallel to the feeding direction. The switching bar is fixedly connected to the piston rod end of the second telescopic rod and is located below the horizontal plate.

[0019] The first protrusion and the second protrusion are both installed on the upper surface of the switching strip. There are multiple first protrusions and one second protrusion. The position of the first protrusion is opposite to the position of the horizontal plate of the switching frame, and the position of the second protrusion is opposite to the horizontal plate of the unloading frame.

[0020] Both the first and second protrusions are inclined surfaces at their front and rear ends in the feeding direction, and can abut against the horizontal plate to lift it up. The height of the first protrusion is the same as the sliding range length of the switching frame, and the height of the second protrusion is the same as the sliding range length of the unloading frame.

[0021] Optionally, the top cover is equipped with a mounting bracket, and a tension spring is fixedly installed on the mounting bracket at the position opposite the horizontal plate, with the top end of the tension spring being fixedly connected to the horizontal plate.

[0022] Optionally, a collection trough is recessed at the discharge port of the frying box, and an oil leakage plate is installed at the top of the collection trough, which is inclined towards the feeding direction.

[0023] Optionally, the feed inlet of the frying box is inclined, and an intercepting baffle is fixed above the feed inlet of the feed box. The distance between the intercepting baffle and the feed inlet of the frying box is not enough for two hard-boiled eggs to pass through stacked. The bottom of the intercepting baffle is vertically transitioned, and the inner wall of the oil tank is inclined at the position directly below the intercepting baffle to form a feeding part. The feeding part is adjacent to the fixed frame or switching frame.

[0024] Optionally, the frying box is equipped with two oil tanks that are not connected, and the discharge port structure of the middle part of the frying box is the same.

[0025] The method for preparing tiger-skin soft-boiled eggs provided in this application adopts the following technical solution:

[0026] A method for preparing tiger-skin soft-boiled eggs, using the aforementioned equipment for preparing tiger-skin soft-boiled eggs, includes the following steps:

[0027] S1. After washing the eggs, boil them in water at 88-95℃ for 4-5 minutes.

[0028] S2. After the eggs are taken out, they are peeled using a shelling device and then placed in water at 15-20℃ to cool for 5 minutes.

[0029] S3. After the eggs have cooled, drain and dry them, then put them into the fryer for the first frying. The oil temperature should be 160-180℃ and the frying time should be 1 minute. Then drain the oil.

[0030] S4. Place the eggs that have been fried once into another fryer for a second frying. The oil temperature should be 200-210℃ and the frying time should be 30-40 seconds. Remove the eggs and drain the oil to form tiger-skin eggs.

[0031] S5. Place the tiger-skin eggs into the pre-made brine and braise at 80-85℃ for 10 minutes. After braising, remove the tiger-skin eggs and place them into the same brine at 50-65℃ for 1-2 hours.

[0032] S6. After cooling the tiger-skin soft-boiled eggs, they are packaged.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] After the soft-boiled eggs are boiled, they are placed in the fryer. The soft-boiled eggs are arranged in a row on the fixed frame and abut against the side wall of the adjacent switching frame. The switching frame moves down, causing the soft-boiled eggs on the fixed frame to move to the switching frame. The switching frame moves up, causing the soft-boiled eggs on the switching frame to move to the next fixed frame. This process is repeated until the soft-boiled eggs are moved to the unloading frame and removed. This allows the soft-boiled eggs to keep rolling during the frying process, which not only reduces the sticking of the eggs but also improves the evenness of the heat distribution during frying. It also effectively controls the frying time of the soft-boiled eggs and improves the product quality.

[0035] The second telescopic cylinder drives the switching bar to slide. The switching bar abuts against the corresponding horizontal plate through the first and second protrusions, causing the switching frame and the unloading frame to move up and down together, thereby synchronously completing the forward movement of the soft-boiled egg.

[0036] When the top cover is pushed upward by the first telescopic cylinder, it simultaneously moves the fixed frame, the switching frame and the unloading frame upward, which makes it easy to clean the oil tank and also makes it easy to clean and maintain the fixed frame, the switching frame and the unloading frame.

[0037] This two-stage frying method creates a slight tiger-skin texture during the first frying, locking in the egg's moisture and reducing the transfer of heat from the oil to the yolk. The second high-temperature, rapid frying then creates a more pronounced tiger-skin texture, effectively minimizing damage to the runny yolk. Attached Figure Description

[0038] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0039] Figure 2 This is a partial sectional view showing the internal structure of the blasting box;

[0040] Figure 3 This is a partial sectional view showing the position of the fixed frame after the top cover is hidden;

[0041] Figure 4 This is a partial cross-sectional view of the driving components after the top cover is hidden;

[0042] Figure 5This is a partial schematic diagram showing the switching box and unloading box at the bottom.

[0043] Figure 6 This is a partial schematic diagram showing the positions of the switching box and the unloading box during the movement process;

[0044] Figure 7 This is a partial schematic diagram showing the switching box and unloading box located at the highest point.

[0045] In the diagram, 1. Frying box; 11. Oil tank; 12. First telescopic cylinder; 13. Collection tank; 131. Oil leakage plate; 14. Interception baffle; 15. Feeding section; 2. Heating wire; 3. Top cover; 31. Mounting frame; 311. Tension spring; 32. Vertical plate; 4. Fixing frame; 41. Fixing plate; 5. Switching frame; 51. Lifting plate; 52. Horizontal plate; 521. Roller sleeve; 6. Unloading frame; 7. Drive assembly; 71. Second telescopic cylinder; 72. Switching strip; 721. Connecting plate; 73. First protrusion; 74. Second protrusion. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0047] This application discloses an apparatus and method for preparing tiger-skin soft-boiled eggs. Example

[0048] refer to Figure 1 and Figure 2 The equipment for preparing tiger-skin soft-boiled eggs includes a frying box 1, a top cover 3, a heating wire 2, a fixing frame 4, and a switching frame 5. The frying box 1 contains two oil tanks 11 that hold edible oil; these tanks are not interconnected. The heating wire 2 is installed at the bottom of the oil tanks 11 to heat the edible oil within. The direction from the inlet to the outlet of the frying box 1 is the feeding direction. The top portion of the inner wall of each oil tank 11 closest to the feeding direction is the outlet, and the top portion of the inner wall of each oil tank 11 furthest from the feeding direction is the inlet.

[0049] Multiple vertically arranged first telescopic cylinders 12 are installed on both sides of the frying box 1. The top cover 3 is installed at the top of the piston rod of the first telescopic cylinder 12, located on the top of the frying box 1, and can be fastened to the frying box 1. The top cover 3 is connected to a negative pressure fan to extract the oil fumes generated by the frying box 1.

[0050] A recessed collection trough 13 is provided at the outlet of the oil tank 11. The bottom of the collection trough 13 is connected to an oil drain port with a valve. An oil drain plate 131, inclined towards the feeding direction, is attached to the top of the collection trough 13. The oil drain plate 131 is composed of multiple parallel metal wires, which are parallel to the vertical plane of the feeding direction. The inlet of the fryer 1 is inclined downwards in the feeding direction. An intercepting baffle 14 is fixed above the inlet of the fryer 1, with an inclined design and a vertical transition at its bottom. The distance between the intercepting baffle 14 and the inlet of the fryer 1 is insufficient for two hard-boiled eggs to pass through stacked together. An inclined feeding section 15 is set directly below the intercepting baffle 14 on the inner wall of the oil tank 11. The distance between the feeding section 15 and the vertical part of the intercepting baffle 14 is just enough for one hard-boiled egg to pass through. Multiple hard-boiled eggs are stacked vertically between the vertical part of the intercepting baffle 14 and the oil tank 11.

[0051] The oil tank 11 is equipped with a moving component that drives the boiled eggs to move in the feeding direction, and the oil level in the oil tank 11 does not exceed the bottom of the intercepting baffle 14.

[0052] The boiled soft-boiled eggs enter the oil tank 11 through the feed inlet of the frying box 1 and come into contact with the intercepting baffle 14. The intercepting baffle 14 causes the soft-boiled eggs to pass through in a row. Under the combined action of the intercepting baffle 14 and the feeding part 15, the soft-boiled eggs pass through the moving component in a single layer, reducing the possibility of some soft-boiled eggs leaking onto the oil surface or uneven heating, thereby improving the tiger skin formation effect. There are two oil tanks 11 in the frying box 1, which can achieve frying of tiger skin eggs at different temperatures, thereby improving the tiger skin formation effect and reducing damage to the soft-boiled center. After the tiger skin eggs are taken out, they fall onto the oil drain plate 131, and the oil on the surface of the tiger skin soft-boiled eggs drips down, and the oil is recycled through the collection tank 13. The arrangement of metal wires on the oil drain plate 131 effectively improves the efficiency of the soft-boiled eggs rolling downwards. The fastening mechanism of the oil drain plate 131 allows for disassembly to clean the oil in the collection tank 13. The top cover 3 is used to collect and treat the oil fumes generated during frying. It can also be lifted up by the extension of the first telescopic cylinder 12 for easy inspection and maintenance.

[0053] refer to Figure 2 and Figure 3The moving component includes a fixed frame 4 and a switching frame 5. There are multiple fixed frames 4, each a long, narrow frame structure. The frame of the fixed frame 4 is formed by connecting multiple vertical frames enclosed by metal wires. Each vertical frame is parallel to the feeding direction, preventing hard-boiled eggs from passing through the fixed frame 4 from top to bottom. Vertically fixed plates 41 are fixed at both ends of the fixed frame 4, with the top of the fixed plates 41 fixedly connected to the top cover 3. The fixed frame 4 is located within the oil tank 11, and its upper surface slopes downwards towards the feeding direction. Only a single row of soft-boiled eggs can be placed on the fixed frame 4, and the soft-boiled eggs on the fixed frame 4 are completely submerged in the oil. Among the multiple fixed frames 4 within the oil tank 11, the fixed frame 4 closest to the feeding section 15 abuts against the feeding section 15, allowing the soft-boiled eggs on the feeding section 15 to roll onto this fixed frame 4.

[0054] refer to Figure 3 and Figure 4 The switching frame 5 has the same structure as the fixed frame 4, and is located between the fixed frames 4 at intervals. The distance between the switching frame 5 and the fixed frame 4 is insufficient for the soft-boiled egg to pass through. Vertically arranged lifting plates 51 are fixed at both ends of the switching frame 5, and the top of the two lifting plates 51 of the same switching frame 5 is fixed with the same horizontal plate 52. The horizontal plate 52 overlaps in the fixed cover body, and multiple sets of vertical plates 32 are also fixed in the top cover body 3. Each set of vertical plates 32 consists of two vertical plates, and the horizontal plate 52 slides vertically between the two vertical plates 32 in one set. The frame closest to the outlet of the oil tank 11 in the oil tank 11 belongs to the switching frame 5, and has lifting plates 51 at both ends. The unloading frame 6 is the switching frame 5 closest to the outlet of the oil tank 11 in an oil tank 11. The top cover is equipped with a drive assembly 7 that can move multiple horizontal plates 52 downwards simultaneously. The unloading frame 6 is extended in the vertical direction.

[0055] Combination Figure 5 , Figure 6 and Figure 7 The highest point of the upper surface of the switching frame 5 and the unloading frame 6 can be moved down to below the inclined surface of the adjacent fixed frame 4 away from the feeding direction. The lowest point of the upper surface of the switching frame 5 can be moved up to above the plane where the top of the adjacent fixed frame 4 is located in the feeding direction. The unloading frame 6 can be moved upward to a position where the bottom end of the inclined surface of its upper surface is above the outlet of the oil tank 11. At this time, the unloading frame 6 is not completely above the adjacent fixed frame 4. The first telescopic cylinder 12 can lift the top cover 3 to a position where the unloading frame 6 is completely detached from the material tank.

[0056] refer to Figure 4 The top cover 3 is equipped with a mounting bracket 31. A tension spring 311 is fixedly installed on the mounting bracket 31 at the position opposite to the horizontal plate 52. The top of the tension spring 311 is fixedly connected to the horizontal plate 52 to pull the horizontal plate 52 downward.

[0057] refer to Figure 3 and Figure 4The drive assembly 7 includes a second telescopic cylinder 71, a switching plate 72, a first protrusion 73, and a second protrusion 74. The second telescopic cylinder 71 is horizontally positioned and installed inside the top cover 3. There are two switching plates 72, arranged parallel to each other. The switching plates 72 are horizontally mounted inside the top cover 3 and are slidably connected to the top cover 3, with the sliding direction of the switching plates 72 parallel to the feeding direction. The two switching plates 72 have a common connecting plate 721 fixedly attached to one end facing the second telescopic cylinder 71, and the piston rod of the second telescopic cylinder 71 is fixedly connected to the connecting plate 721. The switching plates 72 are located below the horizontal plate 52. The first protrusion 73 and the second protrusion 74 are both installed on the upper surface of the switching plates 72, wherein there are multiple first protrusions 73 and one second protrusion 74. The position of the first protrusion 73 is opposite to the position of the horizontal plate 52 of the switching frame 5, and the position of the second protrusion 74 is opposite to the horizontal plate 52 of the unloading frame 6. A roller sleeve 521 is rotatably connected to the horizontal plate 52, which is directly opposite the first protrusion 73 or the second protrusion 74. The front and rear ends of the first protrusion 73 and the second protrusion 74 are inclined surfaces in the feeding direction, and can abut against the roller sleeve 521 to lift the horizontal plate 52. The height of the first protrusion 73 is the same as the sliding range length of the switching frame 5, and the height of the second protrusion 74 is the same as the sliding range length of the unloading frame 6.

[0058] The extension and retraction of the piston rod of the second telescopic cylinder 71 drives the sliding of the switching plate 72, which in turn drives the horizontal plate 52 to move upward through the first protrusion 73 and the second protrusion 74, causing the switching frame 5 and the unloading frame 6 to move up and down together within their respective sections. During the up-and-down movement of the switching frame 5 and the unloading frame 6, if the soft-boiled egg is located on the fixed frame 4, it will roll onto the switching frame 5 when the switching frame 5 moves to its lowest point. When the switching frame 5 moves to its highest point, the soft-boiled egg on the switching frame 5 will roll onto the next fixed frame 4. This rolling motion of the soft-boiled egg during the frying process not only improves the uniformity of heating during the tiger-skin frying process but also enables stable transport of the soft-boiled egg within the oil, allowing for precise control of the frying time. This conveying method design also effectively reduces the probability of the formed tiger-skin pattern adhering to the conveyor, improving the quality of the resulting tiger-skin soft-boiled egg.

[0059] The roller sleeve 521 effectively improves the stability of the horizontal plate 52 when it is lifted, and the tension spring 311 effectively improves the stability of the horizontal plate 52 when it is reset. The guide plate effectively improves the stability of the sliding of the switching frame 5 and the unloading frame 6. The unloading frame 6 can slide up and down to move the fried soft-boiled eggs in the current oil tank 11 onto the oil drain plate 131, and then transfer the soft-boiled eggs downward through the oil drain plate 131. The structural design of the fixed frame 4 and the switching frame 5 not only facilitates the passage of oil, but also facilitates the rolling of the soft-boiled eggs along the feeding direction, while also improving the stability of the structure.

[0060] The implementation principle of Embodiment 1 of this application is as follows: Soft-boiled eggs enter the oil tank 11 through the feed inlet of the frying box 1 and are arranged in rows onto the fixed frame 4 under the action of the intercepting baffle 14 and the feeding part 15. The second telescopic cylinder 71 drives the switching strip 72 to slide, and then the first protrusion 73 and the second protrusion 74 drive the corresponding horizontal plate 52 to slide up and down together, causing the switching frame 5 and the unloading frame 6 to move up and down. This allows the soft-boiled eggs to gradually roll forward during the tiger-skin frying process, and finally be removed from the oil tank 11 through the unloading frame 6. This not only improves the precise control of the frying time of the soft-boiled tiger-skin eggs, but also improves the uniformity of heating during the tiger-skin frying process and reduces the adhesion and detachment of the tiger-skin by making the soft-boiled eggs roll, thus improving the quality and efficiency of industrial production of tiger-skin soft-boiled eggs. The double oil tank 11 setting can realize frying at different temperatures, which can more effectively improve the soft-boiled egg's sugar-core forming effect. Example

[0061] A method for preparing tiger-skin soft-boiled eggs, which in this embodiment can be performed using the tiger-skin soft-boiled egg preparation equipment of Example 1. The steps include:

[0062] S1. After washing the eggs, boil them in water at 88-95℃ for 4-5 minutes.

[0063] S2. After the eggs are taken out, they are peeled using a shelling device and then placed in water at 15-20℃ to cool for 5 minutes.

[0064] S3. After the eggs have cooled, drain and dry them, then put them into the fryer for the first frying. The oil temperature should be 160-180℃ and the frying time should be 1 minute. Then drain the oil.

[0065] S4. Place the eggs that have been fried once into another fryer for a second frying. The oil temperature should be 200-210℃ and the frying time should be 30-40 seconds. Remove the eggs and drain the oil to form tiger-skin eggs.

[0066] S5. Place the tiger-skin eggs into the pre-made brine and braise at 80-85℃ for 10 minutes. After braising, remove the tiger-skin eggs and place them into the same brine at 50-65℃ for 1-2 hours.

[0067] S5. After cooling the tiger-skin soft-boiled eggs, they are then packaged.

[0068] The implementation principle of Embodiment 2 of this application is as follows: During boiling, temperature and time control allow the egg white to stabilize and solidify, while the outer surface of the yolk gradually solidifies, forming a soft-boiled center. Subsequent cooling accelerates the formation of the soft-boiled center. During frying, a low-temperature frying process first creates a slight tiger-skin effect on the surface, locking in the moisture of the soft-boiled egg and reducing heat transfer to the yolk. Then, a short-time high-temperature frying process further enhances the tiger-skin effect. By frying at two different temperatures and precisely controlling the time, damage to the soft-boiled center can be effectively reduced during frying, thereby improving the quality of the produced tiger-skin soft-boiled egg.

[0069] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for preparing tiger-skin soft-boiled eggs, characterized in that: include The fryer box (1) has an oil tank (11) inside that holds cooking oil. The bottom of the oil tank (11) is equipped with an electric heating wire (2). The feeding direction is from the inlet of the fryer box (1) to the outlet of the fryer box (1). The top cover (3) is installed on the top of the fryer (1) and connected to the negative pressure fan to extract the oil fumes generated by the fryer (1); There are multiple fixed frames (4), which are long and strip-shaped and installed in the oil tank (11). The upper surface is inclined from top to bottom in the feeding direction. The oil can flow normally through the fixed frame (4). The boiled eggs cannot pass through the fixed frame (4) from top to bottom. The boiled eggs on the fixed frame (4) are completely submerged in oil. The switching frame (5) has the same structure as the fixed frame (4) and is located between the fixed frames (4) and spaced apart. Lifting plates (51) are fixed at both ends. The top of the two lifting plates (51) of the same switching frame (5) is fixed with the same horizontal plate (52). The horizontal plate (52) overlaps inside the top cover (3). The top cover (3) is provided with a drive assembly (7) that drives multiple horizontal plates (52) to move up and down at the same time. The highest point of the upper surface of the switching frame (5) can be moved down to the slope below the adjacent fixed frame (4) away from the feeding direction. The lowest point of the upper surface of the switching frame (5) can be moved up to the plane above the top of the adjacent fixed frame (4) in the feeding direction. Vertical plates (32), two in a group, or multiple groups, are installed on the top cover (3), and horizontal plates (52) slide vertically between the two vertical plates (32) in a group; The frame closest to the outlet of the oil tank (11) in the feeding direction belongs to the switching frame (5). The switching frame (5) is the unloading frame (6). The unloading frame (6) is also driven up and down by the drive assembly (7). The unloading frame (6) moves down to the same position as the switching frame (5). The unloading frame (6) is extended in the vertical direction. The unloading frame (6) can move up to the position where the bottom of the inclined surface of its upper surface is above the outlet of the oil tank (11). At this time, the unloading frame (6) is not completely above the adjacent fixed frame (4). The drive assembly (7) includes a second telescopic cylinder (71), a switching bar (72), a first protrusion (73), and a second protrusion (74); The second telescopic cylinder (71) is set horizontally and installed inside the top cover (3); The switching bar (72) is horizontally mounted inside the top cover (3) and is slidably connected to the top cover (3). The sliding direction is parallel to the feeding direction. The switching bar (72) is fixedly connected to the piston rod end of the second telescopic rod and is located below the horizontal plate (52). The first protrusion (73) and the second protrusion (74) are both installed on the upper surface of the switching strip (72). There are multiple first protrusions (73) and one second protrusion (74). The position of the first protrusion (73) is opposite to the position of the horizontal plate (52) of the switching frame (5), and the position of the second protrusion (74) is opposite to the horizontal plate (52) of the unloading frame (6). The first protrusion (73) and the second protrusion (74) are inclined surfaces at both ends in the feeding direction and can abut against the horizontal plate (52) to lift the horizontal plate (52). The height of the first protrusion (73) is the same as the sliding range length of the switching frame (5), and the height of the second protrusion (74) is the same as the sliding range length of the unloading frame (6).

2. The equipment for preparing tiger-skin soft-boiled eggs according to claim 1, characterized in that: The frame of the fixed frame (4) is made up of a vertical frame made of multiple metal wires connected together.

3. The equipment for preparing tiger-skin soft-boiled eggs according to claim 1, characterized in that: Fixed plates (41) are fixed at both ends of the fixed frame (4). The fixed plates (41) extend upward and are fixedly connected to the top cover (3). The frying box (1) is equipped with multiple first telescopic cylinders (12). The piston rod of the first telescopic cylinder (12) is set vertically upward and installed at the bottom of the top cover (3). The first telescopic cylinder (12) can make the top cover (3) move vertically upward.

4. The equipment for preparing tiger-skin soft-boiled eggs according to claim 1, characterized in that: The top cover (3) is equipped with a mounting bracket (31). A tension spring (311) is fixedly installed on the mounting bracket (31) opposite the horizontal plate (52). The top of the tension spring (311) is fixedly connected to the horizontal plate (52).

5. The equipment for preparing tiger-skin soft-boiled eggs according to claim 1, characterized in that: A collection trough (13) is recessed at the discharge port of the frying box (1), and an oil drain plate (131) is installed at the top of the collection trough (13) in the direction of feeding.

6. The equipment for preparing tiger-skin soft-boiled eggs according to claim 1, characterized in that: The feed inlet of the frying box (1) is set at an angle, and an intercepting baffle (14) is fixed above the feed inlet of the feed box. The distance between the intercepting baffle (14) and the feed inlet of the frying box (1) is not enough for two hard-boiled eggs to be stacked and passed through. The bottom of the intercepting baffle (14) is set vertically. The inner wall of the oil tank (11) is set at an angle below the intercepting baffle (14) as a feeding part (15). The feeding part (15) is adjacent to the fixed frame (4) or the switching frame (5).

7. The equipment for preparing tiger-skin soft-boiled eggs according to any one of claims 1-6, characterized in that: The frying box (1) is equipped with two oil tanks (11), which are not connected. The middle part of the frying box (1) has the same discharge port structure.

8. A method for preparing tiger-skin soft-boiled eggs, characterized in that, The preparation equipment for tiger-skin soft-boiled eggs according to claim 7 includes the following steps: S1. After washing the eggs, boil them in water at 88-95℃ for 4-5 minutes. S2. After the eggs are taken out, they are peeled using a shelling device and then placed in water at 15-20℃ to cool for 5 minutes. S3. After the eggs have cooled, drain and dry them, then put them into the fryer for the first frying. The oil temperature should be 160-180℃ and the frying time should be 1 minute. Then drain the oil. S4. Place the eggs that have been fried once into another fryer for a second frying. The oil temperature should be 200-210℃ and the frying time should be 30-40 seconds. Remove the eggs and drain the oil to form tiger-skin eggs. S5. Place the tiger-skin eggs into the pre-made brine and braise at 80-85℃ for 10 minutes. After braising, remove the tiger-skin eggs and place them into the same brine at 50-65℃ for 1-2 hours. S6. After cooling the tiger-skin soft-boiled eggs, they are packaged.

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