Low-salt salted duck egg making device and making method

Abstract

The invention discloses a low-salt salted duck egg making device and method, the low-salt salted duck egg making device is provided with a tubular pickling structure and a pressurization system, low-concentration saline water is prepared by using the buoyancy characteristic of the low-salt salted duck egg making device, duck eggs can automatically and slowly sink to the bottom, and after the duck eggs sink to the bottom, pressurization is performed through the pressurization system, so that the duck eggs are not prone to falling off. In the pressurization process, saline water is pressed into the pickling pipeline, elastic potential energy is absorbed through the elastic piece, the process is controlled through the one-way valve, after the pressure is balanced, the one-way valve is closed, the pressure is increased under the action that the elastic piece absorbs the elastic potential energy, the permeation speed can be increased through the increase of the pressure, and the pickling efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of salted duck egg production, in particular to a low-salt salted duck egg production device and a production method. Background Art

[0002] Salted duck eggs are made from duck eggs pickled with salt. They are rich in high-quality protein, vitamin A, and minerals such as calcium, iron, and zinc. They have the effect of promoting appetite and supplementing nutrition.

[0003] At present, factories generally use two methods to pickle salted duck eggs. One is the soaking method, such as the patent with application number CN200810047046.3, which records "place it in a container, pour in the soaking liquid, seal and pickle for 25 to 30 days." The other is the battering method, such as the patent with application number CN201410219739.1, which records "select fresh, crack-free duck eggs, wash and dry them, put the prepared duck eggs into an earthenware jar, seal the jar mouth with cotton paper, and leave it for 20 to 60 days to prepare the product."

[0004] As described in the above patents, both methods require a long time for pickling, and if the pickling efficiency of the two methods needs to be improved, it can generally only be achieved by increasing the salinity. However, this method is not applicable when making low-salinity salted duck eggs. Summary of the Invention

[0005] Based on the fact that the pickling time in the prior art is too long and the efficiency is low, the present invention provides a low-salt salted duck egg production device and a production method.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: Low-salt salted duck egg production device, including: a brine stirring box, in which brine for pickling duck eggs is stored; a brine recovery tank connected to the brine stirring tank via a recovery pipe and a pump to recover brine; A pickling pipeline, comprising a main pickling pipeline, a feed branch pipe provided at the feed end of the main pickling pipeline, and a discharge branch pipe provided at the discharge end of the main pipeline. The main pickling pipeline comprises a vertical section, a connector, and an inclined section. The vertical section and the inclined section are connected by the connector, and the feed branch pipe is connected to the vertical section. The ends of the vertical section and the inclined section are respectively provided with pneumatic plugs for sealing the feed branch pipe and the discharge branch pipe and sealing the main pickling pipeline. The discharge branch pipe is connected to the brine recovery box. A brine adding pipeline is provided with an electric control valve and its two ends are respectively connected to the brine stirring box and the vertical section of the pickling main pipeline; The boosting system includes a liquid replenishing tank, a T-shaped cylinder body arranged at a connecting piece, and a balancing branch pipe arranged at an inclined section. The vertical port of the T-shaped cylinder body is connected to the liquid replenishing tank and is provided with a first one-way valve. The horizontal port on the right side of the T-shaped cylinder body is connected to the connecting piece and is connected to the pickling main pipeline. A second one-way valve is provided in the horizontal port on the right side of the T-shaped cylinder body. A piston driven by a driving device is provided in the horizontal port on the left side of the T-shaped cylinder body. The valve core of the first one-way valve opens when it moves downward, and the valve core of the second one-way valve opens when it moves to the right. A piston head and an elastic member that applies a rebound force to the piston head are provided in the balancing branch pipe.

[0007] Preferably, the upper inner wall of the balancing branch pipe is provided with a limiting step for limiting the position of the piston head.

[0008] Preferably, the elastic member is a spring, the top of the balancing branch is threadedly connected with a pressing member, the top and bottom of the spring respectively abut against the pressing member and the piston head, and the pressure of the spring is adjusted when the pressing member is rotated.

[0009] Preferably, the elastic member is gas sealed in the balancing branch pipe, and an air inlet pipe and an exhaust pipe are provided on both sides of the balancing branch pipe for decompression and pressurization inside the balancing branch pipe.

[0010] Preferably, the vertical section and the inclined section of the main pickling pipe are both provided on a smoothly transitioned protrusion, and the pneumatic plug is sealingly slidably fitted with the main pickling pipe and the main pickling pipe is sealed when its end abuts against the protrusion.

[0011] Preferably, a pull-out collection box is provided in the brine recovery box, the bottom of the pull-out collection box is a screen, and a step hole is provided on the side of the brine recovery box for the pull-out collection box to abut against to form a seal. The recovery pipe includes a first recovery branch pipe, a second recovery branch pipe and a main recovery pipe. The first recovery branch pipe and the second recovery branch pipe are respectively arranged on the upper side and the lower side of the screen and the first recovery branch pipe and the second recovery branch pipe are both provided with electric control valves. The first recovery branch pipe and the second recovery branch pipe are connected to the main recovery pipe and a pump is arranged on the main recovery pipe.

[0012] Preferably, a duck egg feeding structure is also included, which includes a guide seat arranged at the end of the feed branch pipe and a plurality of spaced guide rods arranged on the left side of the guide seat and inclined. The guide seat has a guide hole connected to the inlet of the feed branch pipe and has a guide groove with a soft inner wall.

[0013] Preferably, a reflux pipe is further included, one end of which is connected to the feed branch pipe, and the other end of which is connected to the brine recovery box.

[0014] Preferably, it also includes a liquid infusion pipeline, one end of which is connected to the brine stirring box, and the other end is connected to the vertical section of the pickling main pipeline, and the liquid infusion pipeline is provided with an electric control valve.

[0015] The method for producing low-salt salted duck eggs is carried out using the low-salt salted duck egg production device, comprising the following steps: S1, preparing salt water, and preparing salt water with a concentration of 10%-11% in a salt water mixing box to ensure that the density of the duck eggs is greater than the density of the salt water and they sink; S2, adding brine, closing the pneumatic plug at the inclined section of the pickling main pipeline and adding the brine configured in S1 into the pickling main pipeline so that the feed branch pipe and the brine recovery box are filled with brine; S3, adding duck eggs, opening the plug at the vertical section of the pickling main pipe, and adding the duck eggs to the vertical section of the pickling main pipe. The duck eggs sink to the bottom of the inclined pipe under their own gravity. During the sinking process, the salt water in the feed branch pipe buffers the duck eggs. S3, pressurized storage, is performed by means of a pressurizing system. First, an external force is applied to the fluid infusion direction to push open the first one-way valve and inject saline into the T-shaped cylinder. Then, the driving device drives the piston to the right, closing the first one-way valve and simultaneously pushing open the second one-way valve. The saline in the T-shaped cylinder is pressed into the main pickling pipe. At this time, the elastic member in the balancing branch is compressed, storing elastic potential energy and applying pressure to the saline in the main pickling pipe through the piston head and piston to increase the pressure of the saline in the main pickling pipe. After the pressure is balanced, the second one-way valve is closed, and the piston is retracted. During the retraction, the first one-way valve is opened, and the fluid infusion tank replenishes saline into the T-shaped cylinder. The elastic member applies pressure to the saline in the main pickling pipe, and the pickling is maintained in this state. S4, brine and duck eggs recovery, using the above-mentioned low-salt salted duck egg making device, first open the two pneumatic plugs to allow the duck eggs in the brine to enter the brine recovery box. When the duck eggs enter, the brine liquid level is above the screen to act as a buffer. The first recovery branch pipe first sucks the brine to ensure that all duck eggs have a safe buffer surface when they fall into the brine recovery box. When all duck eggs fall into the brine recovery box, the second recovery branch pipe is used to suck and recover the brine so that the brine liquid level in the brine recovery box is lower than the screen and the lowest point of the opening of the side wall of the brine recovery box at the pull-out collection box. Then the pull-out collection box is pulled out to take out the pickled duck eggs; In step S3, the pressure applied to the salt water under the same state is adjusted by the elastic member.

[0016] Compared with the prior art, the advantages of the present invention are as follows: the present application utilizes the buoyancy characteristics of the duck eggs to prepare low-concentration brine, so that the duck eggs can automatically and slowly sink to the bottom, and after sinking to the bottom, the brine is pressurized by the boosting system. During the pressurization process, the brine is pressed into the pickling pipe and the elastic potential energy is absorbed by the elastic part. This process is controlled by a one-way valve. When the pressure is balanced, the one-way valve is closed, and the pressure increases due to the elastic potential energy absorbed by the elastic part. The increase in pressure can accelerate the penetration speed and improve the pickling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the depicted objects and may contain exaggerated representations. Furthermore, the drawings are not necessarily drawn to scale.

[0018] Figure 1 and Figure 2 is a perspective view of Example 1; Figure 3 is a side view of Example 1; Figure 4 is a cross-sectional view of Example 1; Figure 5 is a cross-sectional view of Example 1; In the figure: 10. Brine mixing box; 20. Brine recovery box; 30. Liquid replenishing tank; 40. Pickling pipeline; 401. Pickling main pipeline; 4011. Vertical section; 4012. Inclined section; 402. Feed branch pipe; 403. Balance branch pipe; 4031. Piston; 4032. Spring; 4033. Down-pressing piece; 404. Connecting piece; 4041. Elbow; 4042. Wrapping seat; 405. Discharge branch pipe; 50. Second one-way valve; 60. First one-way valve; 70. T-shaped cylinder; 701. Piston; 702. Driving device; 80. Return pipe; 90. Pump; 01. Pneumatic plug; 02. Main recovery pipeline; 03. First recovery branch pipe; 04. Second recovery branch pipe; 05. Pull-out collection box; 051. Screen; 06. Guide seat; 07. Guide rod. DETAILED DESCRIPTION

[0019] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0020] It should be noted that like reference numerals denote like items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings. Example

[0021] This embodiment mainly describes the title of the low-salt salted duck egg production device, which is as follows: Low-salt salted duck egg production device, such as Figure 1-5 Shown, including: A brine stirring box 10 is used to store brine for pickling duck eggs; The brine recovery tank 20 is connected to the brine stirring tank 10 through a recovery pipe and a pump 90 to recover the brine; The pickling pipeline 40 includes a main pickling pipeline 401, a feed branch pipe 402 provided at the feed end of the main pickling pipeline 401, and a discharge branch pipe 405 provided at the discharge end of the main pipeline. The main pickling pipeline 401 includes a vertical section 4011, a connector 404, and an inclined section 4012. The vertical section 4011 and the inclined section 4012 are connected by the connector 404, and the feed branch pipe 402 is connected to the vertical section 4011. The ends of the vertical section 4011 and the inclined section 4012 are respectively provided with pneumatic plugs 01 for sealing the feed branch pipe 402 and the discharge branch pipe 405 and sealing the main pickling pipeline 401. The discharge branch pipe 405 is connected to the brine recovery tank 20. A brine adding pipeline is provided with an electric control valve and its two ends are respectively connected to the brine stirring box 10 and the vertical section 4011 of the pickling main pipeline 401; The pressurization system includes a liquid replenishing tank 30, a T-shaped cylinder 70 disposed at a connector 404, and a balancing branch 403 disposed at an inclined section 4012. The vertical port of the T-shaped cylinder 70 is connected to the liquid replenishing tank 30 and is equipped with a first one-way valve 60. The horizontal port on the right side of the T-shaped cylinder 70 is connected to the connector 404 and to the main pickling pipe 401. A second one-way valve 50 is installed in the right horizontal port of the T-shaped cylinder 70. A piston 701 driven by a drive device 702 is installed in the left horizontal port of the T-shaped cylinder 70. The valve core of the first one-way valve 60 opens when it moves downward, and the valve core of the second one-way valve 50 opens when it moves rightward. The balancing branch 403 is equipped with a piston head 4031 and an elastic member that applies a rebound force to the piston head 4031. The specific pressurization process in this solution is described in Example 2.

[0022] As an advantage, the inner sidewall of the balancing branch pipe 403 is provided with a limiting step for limiting the position of the piston head 4031. The limiting step is used to limit the position of the piston head 4031 to prevent it from falling into the pickling main pipe 401.

[0023] Preferably, the elastic member is a spring 4032, and a pressing member 4033 is threadedly connected to the top of the balancing branch 403. The top and bottom of the spring 4032 respectively abut against the pressing member 4033 and the piston head 4031. When the pressing member 4033 is rotated, the pressure of the spring 4032 is adjusted.

[0024] Preferably, the elastic member is the gas sealed in the balancing branch 403. An air inlet pipe and an exhaust pipe are provided on both sides of the balancing branch 403 for decompression and pressurization inside the balancing branch 403. The above are two structures for adjusting the elastic member, and pressure can be adjusted as needed.

[0025] Preferably, the vertical section 4011 and the inclined section 4012 of the main pickling conduit 401 are both provided on a smoothly transitioned protrusion. The pneumatic plug 01 slides in a sealed manner with the main pickling conduit 401, and when its end abuts against the protrusion, the main pickling conduit 401 is sealed. The protrusion is used to completely seal the main pickling conduit 401 to prevent air leakage.

[0026] Preferably, a pull-out collection box 05 is provided in the brine recovery box 20. The bottom of the pull-out collection box 05 is a screen 051. A stepped hole is provided on the side of the brine recovery box 20 for the pull-out collection box 05 to abut against to form a seal. The recovery pipeline includes a first recovery branch pipe 03, a second recovery branch pipe 04, and a main recovery pipeline 02. The first recovery branch pipe 03 and the second recovery branch pipe 04 are respectively located on the upper and lower sides of the screen 051. The first recovery branch pipe 03 and the second recovery branch pipe 04 are both provided with an electric control valve. The first recovery branch pipe 03 and the second recovery branch pipe 04 are connected to the main recovery pipeline 02, and a pump 90 is provided on the main recovery pipeline 02. The specific working process of this solution is shown in Example 2. Its function is to provide a buffer for the duck eggs while recovering the brine. After the duck eggs have completely fallen in, some brine is discharged to facilitate pulling out the pull-out collection box 05 without causing brine leakage.

[0027] Preferably, the device also includes a duck egg feeding mechanism, comprising a guide seat 06 positioned at the end of the feed branch pipe 402 and several spaced, inclined guide rods 07 positioned to the left of the guide seat 06. The guide seat 06 has a guide hole connected to the inlet of the feed branch pipe 402 and a guide groove with a soft inner wall. The guide groove separates the duck eggs between the guide rods 07 to prevent collisions or direct extension of the guide rods 07 into the feed branch pipe 402. This solution guides the duck eggs into the feed branch pipe 402 while also buffering and diverting them, preventing them from colliding with each other or with the guide seat 06, potentially causing them to break.

[0028] As an option, a reflux pipe 80 is further included, one end of which is connected to the feed branch pipe 402 and the other end is connected to the brine recovery box 20. The reflux pipe 80 is used to allow brine to overflow from the feed branch pipe 402 when the pickling main pipe 401 is closed.

[0029] Preferably, a rehydration conduit is also included, one end of which is connected to the brine mixing tank 10 and the other end to the vertical section 4011 of the main pickling conduit 401. The rehydration conduit is equipped with an electronically controlled valve. The rehydration conduit is used to inject brine into the main pickling conduit 401. A separate set of conduits can be provided to connect the brine mixing tank 10 and the rehydration tank 30, controlled by an electronically controlled valve.

[0030] It should also be noted that the brine mixing tank 10, brine recovery tank 20, and rehydration tank 30 share a common structure, while multiple pickling pipes 40 are provided and arranged side by side. The rehydration tank 30 can be equipped with a pressurizing device and a closable inlet. The pressurizing device is used to inject brine into the T-shaped cylinder 70 during initial use, while the inlet can be used to replenish salt. Finally, the connector 404 includes an internal elbow 4041 and a wrapping seat 4042 that seals the outer circumference of the elbow 4041. Both the wrapping seat 4042 and the elbow 4041 are provided with holes for the brine in the T-shaped cylinder 70 to pass through. Example

[0031] The present embodiment mainly describes the title of the method for making low-salt salted duck eggs, which is as follows: The method for producing low-salt salted duck eggs is carried out using the low-salt salted duck egg production device, comprising the following steps: S1, preparing salt water, and preparing salt water with a concentration of 10%-11% in a salt water mixing box to ensure that the density of the duck eggs is greater than the density of the salt water and they sink; S2, adding brine, closing the pneumatic plug at the inclined section of the pickling main pipeline and adding the brine configured in S1 into the pickling main pipeline so that the feed branch pipe and the brine recovery box are filled with brine; S3, adding duck eggs, opening the plug at the vertical section of the pickling main pipe, and adding the duck eggs to the vertical section of the pickling main pipe. The duck eggs sink to the bottom of the inclined pipe under their own gravity. During the sinking process, the salt water in the feed branch pipe buffers the duck eggs. S3, pressurized storage, is performed by means of a pressurizing system. First, an external force is applied to the fluid infusion direction to push open the first one-way valve and inject saline into the T-shaped cylinder. Then, the driving device drives the piston to the right, closing the first one-way valve and simultaneously pushing open the second one-way valve. The saline in the T-shaped cylinder is pressed into the main pickling pipe. At this time, the elastic member in the balancing branch is compressed, storing elastic potential energy and applying pressure to the saline in the main pickling pipe through the piston head and piston to increase the pressure of the saline in the main pickling pipe. After the pressure is balanced, the second one-way valve is closed, and the piston is retracted. During the retraction, the first one-way valve is opened, and the fluid infusion tank replenishes saline into the T-shaped cylinder. The elastic member applies pressure to the saline in the main pickling pipe, and the pickling is maintained in this state. S4, brine and duck eggs recovery, using the above-mentioned low-salt salted duck egg making device, first open the two pneumatic plugs to allow the duck eggs in the brine to enter the brine recovery box. When the duck eggs enter, the brine liquid level is above the screen to act as a buffer. The first recovery branch pipe first sucks the brine to ensure that all duck eggs have a safe buffer surface when they fall into the brine recovery box. When all duck eggs fall into the brine recovery box, the second recovery branch pipe is used to suck and recover the brine so that the brine liquid level in the brine recovery box is lower than the screen and the lowest point of the opening of the side wall of the brine recovery box at the pull-out collection box. Then the pull-out collection box is pulled out to take out the pickled duck eggs; In step S3, the pressure applied to the salt water under the same state is adjusted by the elastic member.

[0032] The above is a detailed introduction to the low-salt salted duck egg production device and production method provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A low-salt salted duck egg production device, characterized in that: include: a brine stirring box, in which brine for pickling duck eggs is stored; a brine recovery tank connected to the brine stirring tank via a recovery pipe and a pump to recover brine; A pickling pipeline, comprising a main pickling pipeline, a feed branch pipe provided at the feed end of the main pickling pipeline, and a discharge branch pipe provided at the discharge end of the main pipeline. The main pickling pipeline comprises a vertical section, a connector, and an inclined section. The vertical section and the inclined section are connected by the connector, and the feed branch pipe is connected to the vertical section. The ends of the vertical section and the inclined section are respectively provided with pneumatic plugs for sealing the feed branch pipe and the discharge branch pipe and sealing the main pickling pipeline. The discharge branch pipe is connected to the brine recovery box. A brine adding pipeline is provided with an electric control valve and its two ends are respectively connected to the brine stirring box and the vertical section of the pickling main pipeline; The boosting system includes a liquid replenishing tank, a T-shaped cylinder body arranged at a connecting piece, and a balancing branch pipe arranged at an inclined section. The vertical port of the T-shaped cylinder body is connected to the liquid replenishing tank and is provided with a first one-way valve. The horizontal port on the right side of the T-shaped cylinder body is connected to the connecting piece and is connected to the pickling main pipeline. A second one-way valve is provided in the horizontal port on the right side of the T-shaped cylinder body. A piston driven by a driving device is provided in the horizontal port on the left side of the T-shaped cylinder body. The valve core of the first one-way valve opens when it moves downward, and the valve core of the second one-way valve opens when it moves to the right. A piston head and an elastic member that applies a rebound force to the piston head are provided in the balancing branch pipe.

2. The low-salt salted duck egg production device according to claim 1, characterized in that The inner side wall of the balance branch pipe is provided with a limiting step for limiting the position of the piston head.

3. The low-salt salted duck egg production device according to claim 1, characterized in that The elastic part is a spring, and a pressing part is threadedly connected to the top of the balancing branch pipe. The top and bottom of the spring respectively abut against the pressing part and the piston head. When the pressing part is rotated, the pressure of the spring is adjusted.

4. The low-salt salted duck egg production device according to claim 1, characterized in that The elastic member is the gas sealed in the balancing branch pipe. An intake pipe and an exhaust pipe are provided on both sides of the balancing branch pipe for pressure relief and pressure increase inside the balancing branch pipe.

5. The low-salt salted duck egg production device according to claim 1, characterized in that The vertical section and the inclined section of the pickling main pipeline are both arranged on the smoothly transitioned protrusion. The pneumatic plug is sealingly slidably matched with the pickling main pipeline and the pneumatic plug seals the pickling main pipeline when its end abuts against the protrusion.

6. The low-salt salted duck egg production device according to claim 1, characterized in that A pull-out collection box is provided in the brine recovery box, the bottom of the pull-out collection box is a screen, and a step hole is provided on the side of the brine recovery box for the pull-out collection box to be abutted to form a seal. The recovery pipe includes a first recovery branch pipe, a second recovery branch pipe and a main recovery pipe. The first recovery branch pipe and the second recovery branch pipe are respectively arranged on the upper and lower sides of the screen and the first recovery branch pipe and the second recovery branch pipe are both provided with electric control valves. The first recovery branch pipe and the second recovery branch pipe are connected to the main recovery pipe and a pump is arranged on the main recovery pipe.

7. The low-salt salted duck egg production device according to claim 1, characterized in that It also includes a duck egg feeding structure, which includes a guide seat arranged at the end of the feed branch pipe and several spaced guide rods arranged on the left side of the guide seat and inclined. The guide seat has a guide hole connected to the inlet of the feed branch pipe and has a guide groove with a soft inner wall.

8. The low-salt salted duck egg production device according to claim 1, characterized in that It also includes a reflux pipe, one end of which is connected to the feed branch pipe, and the other end of which is connected to the brine recovery box.

9. The low-salt salted duck egg production device according to claim 1, characterized in that: It also includes a liquid replenishing pipeline, one end of which is connected to the brine stirring box, and the other end is connected to the vertical section of the pickling main pipeline, and the liquid replenishing pipeline is provided with an electric control valve.

10. A method for producing low-salt salted duck eggs, characterized in that: The low-salt salted duck egg production device according to any one of claims 1 to 9 is used for production, comprising the following steps: S1, preparing salt water, and preparing salt water with a concentration of 10%-11% in a salt water mixing box to ensure that the density of the duck eggs is greater than the density of the salt water and they sink; S2, adding brine, closing the pneumatic plug at the inclined section of the pickling main pipeline and adding the brine configured in S1 into the pickling main pipeline so that the feed branch pipe and the brine recovery box are filled with brine; S3, adding duck eggs, opening the plug at the vertical section of the pickling main pipe, and adding the duck eggs to the vertical section of the pickling main pipe. The duck eggs sink to the bottom of the inclined pipe under their own gravity. During the sinking process, the salt water in the feed branch pipe buffers the duck eggs. S3, pressurized storage, is performed by means of a pressurizing system. First, an external force is applied to the fluid infusion direction to push open the first one-way valve and inject saline into the T-shaped cylinder. Then, the driving device drives the piston to the right, closing the first one-way valve and simultaneously pushing open the second one-way valve. The saline in the T-shaped cylinder is pressed into the main pickling pipe. At this time, the elastic member in the balancing branch is compressed, storing elastic potential energy and applying pressure to the saline in the main pickling pipe through the piston head and piston to increase the pressure of the saline in the main pickling pipe. After the pressure is balanced, the second one-way valve is closed, and the piston is retracted. During the retraction, the first one-way valve is opened, and the fluid infusion tank replenishes saline into the T-shaped cylinder. The elastic member applies pressure to the saline in the main pickling pipe, and the pickling is maintained in this state. S4, recovery of brine and duck eggs, using the low-salt salted duck egg making device according to claim 6, first opening the two pneumatic plugs to allow the duck eggs in the brine to enter the brine recovery box. When the duck eggs enter, the brine liquid level is above the screen to act as a buffer. The first recovery branch pipe first sucks the brine to ensure that all duck eggs have a safe buffer surface when they fall into the brine recovery box. After all duck eggs fall into the brine recovery box, the second recovery branch pipe is used to suck and recover the brine so that the brine liquid level in the brine recovery box is lower than the screen and the lowest point of the opening of the side wall of the brine recovery box at the pull-out collection box. The pull-out collection box is then pulled out to take out the pickled duck eggs; In step S3, the pressure applied to the salt water under the same state is adjusted by the elastic member described in claim 3 or 4.

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