Slurry wrapping device for preserved egg making and preserved egg making method

Abstract

According to the slurry wrapping device for preserved egg making and the preserved egg making method, slurry is stored in a box body with two cavities, duck eggs are conveyed through a roller sleeve with a spiral side wall, a slurry height adjusting mechanism for driving the slurry to ascend and descend is arranged, and through the two containing cavities, the slurry height adjusting mechanism can adjust the slurry height to be larger than the slurry height adjusting mechanism; a cavity is formed in the roller sleeve, a center shaft sleeved with a roller sleeve is arranged in the cavity, a gap and a groove are formed by the spiral structures on every two adjacent roller sleeves, the gaps are used for slurry to pass through, the grooves are used for containing duck eggs, and when the center shafts rotate in the same direction, the grooves move rightwards and drive the duck eggs to move forwards. When the duck eggs move, the bottoms of the duck eggs are continuously coated with slurry in the first containing cavity, when the duck eggs enter the second containing cavity, the height of the slurry is reduced, the immersed parts of the surfaces of the duck eggs are reduced, the duck eggs can continuously rotate in the advancing process at the moment, secondary slurry coating is conducted, and it can be guaranteed that the duck eggs are uniformly coated with the slurry through two-time slurry coating.

Description

Technical Field

[0001] The present invention relates to the field of preserved egg production, in particular to a batter coating device and a method for producing preserved eggs. Background Art

[0002] Preserved eggs, also known as songhua eggs and changed eggs, are a traditional flavored egg product in my country. The production method uses the egg's protein gel property in an alkaline solution to make it become an elastic solid. Normal preserved eggs are dark green with songhua and are elastic. The center of the yolk is solidified, which is called a sandy preserved egg. If the center of the yolk is not completely solidified, it is called a soft preserved egg.

[0003] In the production of preserved eggs, coating with alkaline mud is a key step. Currently, there are two types of equipment for coating with mud. One is to set a mud feeding device at the intervals between the feeding rods. When the duck eggs roll down from the gap between the two feeding rods, the mud feeding device continuously feeds mud, thereby coating the surface of the duck eggs with a layer of mud. However, this method of coating with mud is affected by the rolling speed of the duck eggs. Generally, only the top area of ​​the duck eggs can be coated with mud, resulting in uneven mud. Even if a longer feeding area is set, a blind area for coating with mud will be formed on the edge of the duck eggs. The other method is to let the duck eggs fall into the mud (as shown in the following video). As shown in https: / / haokan.baidu.com / v?pd=wisenatural&vid=8249150027511973285), the duck eggs are then picked up. This type of structure has three problems. The first is that the rhythm of the duck eggs falling and hooking needs to be strictly controlled to prevent the hook claws from interfering with the duck eggs when falling. The second is that if shallow hooking is used, the slurry at the bottom cannot be used, and it will precipitate over time, which is extremely difficult to clean. The third is that the grabbing and placing actions will increase multiple processes, making the efficiency relatively low. Summary of the Invention

[0004] Based on the shortcomings of the prior art such as uneven batter coating, the present invention provides a batter coating device and a method for producing preserved eggs.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A batter coating device for producing preserved eggs, comprising: The box body is supported by a bracket and has a first accommodating chamber and a second accommodating chamber separated by a partition, and the two accommodating chambers are both provided with mud for making preserved eggs; The mud height adjustment mechanism includes two sets and is respectively arranged in the first accommodating chamber and the second accommodating chamber for adjusting the mud height on both sides; The feeding roller includes a plurality of central shafts arranged at equal intervals, which pass through the left side of the box body, the partition and the right side of the box body and are rotatably sealed with the box body and the partition. Two sections of roller sleeves with spiral side walls are provided on the surface of the roller sleeve. The two sections of roller sleeves completely wrap the central shaft parts in the first accommodating cavity and the second accommodating cavity respectively. Two adjacent roller sleeves each have a plurality of protrusions. The gap between the two protrusions is smaller than the minimum width of the preserved egg. The two protrusions form a protrusion group, and the groove formed between the two adjacent protrusion groups on the left and right is used to transport the preserved egg. A driving device, which is used to drive the central shaft to rotate in the same direction; The discharge control device includes a discharge hole provided on the right side of the box body, a cylinder provided on the right side wall of the box body and linked to the mud height adjustment mechanism, and a plugging head provided on the cylinder. The plugging head extends into the discharge hole under the drive of the cylinder to block the discharge hole. The partition is provided with a through hole for the preserved eggs to pass through.

[0006] Preferably, the mud height adjustment mechanism includes a lifting cylinder and a piston plate arranged at the output end of the lifting cylinder. The piston plates are respectively located in the first accommodating chamber and the second accommodating chamber and are respectively slidingly sealed with the cavity walls of the first accommodating chamber and the second accommodating chamber. The lifting cylinder drives the piston plate to rise and fall to adjust the height of the mud top surface.

[0007] Preferably, the mud height adjustment mechanism includes a first pressurizing chamber arranged at the side wall of the first accommodating chamber and connected to the first accommodating chamber, a second pressurizing chamber arranged at the side wall of the second accommodating chamber and connected to the second accommodating chamber, and two sets of pneumatic pressurization and pressure relief devices. Mud is provided in the first pressurizing chamber and the second pressurizing chamber. The two sets of pneumatic pressurization and pressure relief devices are respectively connected to the first pressurizing chamber and the second pressurizing chamber to pressurize and relieve the pressure of the first pressurizing chamber and the second pressurizing chamber; the first accommodating chamber and the first pressure chamber, the second accommodating chamber and the second pressure chamber are all connected at the bottom.

[0008] Preferably, the gas-type pressurized pressure relief device includes an air source station, a boost pipe and a pressure relief pipe. One end of the boost pipe and the pressure relief pipe are connected to the top of the corresponding pressurized chamber, and the other end of the boost pipe is connected to the air source station. The boost pipe and the pressure relief pipe are both provided with electric control valves for controlling the on and off of the two pipelines.

[0009] Preferably, the driving device includes a driving motor, pulleys arranged on the end of the central shaft and the output shaft of the driving motor, a synchronous belt meshed with each pulley, and a plurality of rollers 203 for pressing down the outer side wall of the synchronous belt to make the synchronous belt S-shaped, and the driving motor drives each central shaft to rotate synchronously in the same direction through the pulleys and the synchronous belt; or the driving device includes a driving motor and a first gear arranged at the end of the central shaft, adjacent first gears are transmitted by transmission gears and one of the first gears is driven by the driving motor.

[0010] Preferably, the right side wall of the box body is provided with N discharge holes, and a sealing seat surrounding the discharge holes is provided at the discharge holes, the sealing seat has a pyramid-shaped discharge port, the discharge port is connected with the discharge hole, and the shape of the discharge port is consistent with the shape of the sealing head, and the sealing head is inserted into the discharge port to seal the discharge port to seal the discharge hole; or the right side wall of the box body is provided with N discharge holes, the discharge holes are provided with a guide seat, the guide seat is provided with a slide groove, and a sealing plate driven by a cylinder is sliding in the slide groove, the sealing plate is tightly attached to the right side wall of the box body and blocks the discharge hole when it descends and opens the discharge hole when it rises.

[0011] The method for preparing preserved eggs comprises the following steps: S1, cleaning and selecting, cleaning the duck eggs and selecting qualified duck eggs through light exposure; S2, making alkali mud; S3, wrapping the mud, the height of the mud is adjusted by raising and lowering the lifting cylinder in the above-mentioned mud height adjustment mechanism. When adjusting the height, a detection area is set at the gap between the outermost roller sleeve and the side wall of the box, and an ultrasonic sensor is set above the detection area. The top surface height of the mud is judged by an echo of the ultrasonic sensor to compensate for the lifting and lowering amplitude of the mud height adjustment mechanism. The remaining amount of mud is judged by the strongest echo of the ultrasonic sensor, and a prompt to add mud is given.

[0012] Preferably, the height of the mud is adjusted by raising and lowering the lifting cylinder in the above-mentioned mud height adjustment mechanism, by setting a detection area at the gap between the outermost roller sleeve and the side wall of the box, and setting an ultrasonic sensor above the detection area, and at the same time setting an ultrasonic sensor on the top of the boosting chamber. The external ultrasonic sensor is used to judge the top surface height of the mud for feedback to control the two electrically controlled valves, and the ultrasonic sensor in the boosting chamber is used to judge the amount of mud, thereby giving a prompt to add mud.

[0013] Compared with the prior art, the advantages of the present invention are as follows: the present application sets up two accommodating chambers, and a central shaft with a roller sleeve is provided in the cavity, wherein the spiral structures on the two adjacent roller sleeves form a gap and a groove, the gap is used for the passage of mud, and the groove is used to accommodate duck eggs. When the central shaft rotates in the same direction, the groove moves to the right and drives the duck eggs forward. When the duck eggs move, their bottoms are continuously coated with batter in the first accommodating chamber. When they enter the second accommodating chamber, the height of the mud is lowered so that the part of the duck egg surface immersed in the batter is reduced. At this time, the duck eggs will continue to rotate during the forward process, thereby being coated with batter for the second time. The two coatings can ensure that the duck eggs are evenly coated with batter. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 and Figure 2 is a perspective view of Example 1; Figure 3 is a cross-sectional view of Example 1; Figure 4 It is a three-dimensional diagram of the driving mechanism, central shaft and roller sleeve; In the figure: 10, box body; 101, first accommodating chamber; 102, second accommodating chamber; 103, partition; 104, discharge hole; 20, driving device; 201, driving motor; 202, pulley; 203, roller 203; 30, center axis; 301, roller sleeve; 302, groove; 401, guide seat; 402, sealing plate; 403, cylinder. DETAILED DESCRIPTION

[0016] 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.

[0017] 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

[0018] This embodiment mainly describes the battering device for producing preserved eggs, which is as follows: Batter coating device for preserved egg production, such as Figure 1-4 Shown, including: The box body 10 is supported by a bracket and has a first accommodating chamber 101 and a second accommodating chamber 102 separated by a partition 103. Mud for making preserved eggs is placed in both accommodating chambers. The mud height adjustment mechanism includes two sets and is respectively provided in the first accommodating chamber 101 and the second accommodating chamber 102 for adjusting the mud height on both sides; The feeding roller includes a plurality of central shafts 30 arranged at equal intervals, which pass through the left side of the box body 10, the partition 103 and the right side of the box body 10 and are rotatably sealed with the box body 10 and the partition 103. Two sections of roller sleeves 301 with spiral side walls are provided on the surface of the feeding roller. The two sections of roller sleeves 301 completely wrap the central shaft 30 in the first accommodating cavity 101 and the second accommodating cavity 102 respectively. Two adjacent roller sleeves 301 each have a plurality of raised portions. The gap between the two raised portions is smaller than the minimum width of the preserved egg, and the two raised portions form a raised portion group. The groove 302 formed between the two adjacent raised portions is used to transport the preserved egg. A driving device 20 for driving the central shaft 30 to rotate in the same direction; The discharge control device includes a discharge hole 104 provided on the right side of the box body 10, a cylinder 403 provided on the right side wall of the box body 10 and linked to the mud height adjustment mechanism, and a plugging head provided on the cylinder 403. The plugging head extends into the discharge hole 104 under the drive of the cylinder 403 to block the discharge hole 104. The partition 103 is provided with a through hole for the passage of preserved eggs. This solution sets up two accommodating chambers, and a central shaft 30 is provided in each chamber, which is covered with a roller sleeve 301. The spiral structure on the two adjacent roller sleeves 301 forms a gap and a groove 302. The gap is for the passage of mud, and the groove 302 is for accommodating duck eggs. When the central shaft 30 rotates in the same direction, the groove 302 moves to the right and drives the duck eggs forward. As the duck eggs move, their bottoms are continuously coated with batter in the first accommodating chamber 101. When they enter the second accommodating chamber 102, the mud level is lowered, reducing the surface immersion of the duck eggs. At this time, the duck eggs will continuously rotate during the forward movement, thereby being coated with batter twice. The two coatings can ensure that the duck eggs are evenly coated with batter. The operation process is as follows: first, the mud in the two accommodating chambers is lifted to ensure that it plays a buffering role when the duck eggs fall in, avoiding the duck eggs colliding with the roller sleeve 301 and being damaged. Then, the mud in the two accommodating chambers is lowered and maintained at two different heights to differentiate the degree of immersion of the duck eggs. Then, the driving device 20 is turned on to drive the central shaft 30 and the roller sleeve 301 thereon to rotate.

[0019] The mud height adjustment mechanism is used to raise the mud to provide cushioning for the duck eggs, and also to lower the mud to partially immerse the duck eggs to reduce resistance. It includes the following two solutions: Solution 1: The mud height adjustment mechanism includes a lift cylinder and a piston plate mounted at the output end of the lift cylinder. The piston plates are located within the first and second accommodating chambers 101, 102, respectively, and engage in a sliding, sealing engagement with the walls of these chambers. The lift cylinder drives the piston plates upward and downward, thereby adjusting the height of the mud top surface. In addition to the aforementioned benefits, this solution also maximizes mud utilization and prevents bottom sedimentation.

[0020] In the second solution, the mud height adjustment mechanism includes a first pressurizing chamber disposed on the side wall of the first accommodating chamber 101 and connected to the first accommodating chamber 101, a second pressurizing chamber disposed on the side wall of the second accommodating chamber 102 and connected to the second accommodating chamber 102, and two sets of pneumatic pressurization and pressure relief devices. Mud is placed in both the first and second pressurizing chambers. The two sets of pneumatic pressurization and pressure relief devices are respectively connected to the first and second pressurization chambers to increase and relieve pressure in the first and second pressurization chambers. The first accommodating chamber 101 and the first pressurizing chamber, as well as the second accommodating chamber 102 and the second pressurizing chamber, are all connected at the bottom. This solution feeds from the bottom, thus ensuring that the mud is in a circulating state, and avoids the situation in the prior art where only the top is used.

[0021] Specifically, the gas-type pressurized pressure relief device includes an air source station, a boost pipe and a pressure relief pipe. One end of the boost pipe and the pressure relief pipe are connected to the top of the corresponding pressurized chamber, and the other end of the boost pipe is connected to the air source station. The boost pipe and the pressure relief pipe are both provided with electric control valves to control the on and off of the two pipelines.

[0022] Preferably, the drive device 20 includes a drive motor 201, pulleys 202 disposed at the ends of the central shaft 30 and on the output shaft of the drive motor 201, and a synchronous belt meshing with each pulley 202. The drive motor 201, via the pulleys 202 and the synchronous belt, drives each central shaft 30 to rotate synchronously and in the same direction. The synchronous belt is pressed down by multiple rollers 203 between adjacent pulleys 202, forming an S-shaped configuration. The drive device includes a drive motor and a first gear disposed at the end of the central shaft. Adjacent first gears are driven by transmission gears, one of which is driven by the drive motor. This solution ensures that the central shaft 30 rotates synchronously, causing the grooves 302 on two adjacent roller sleeves 301 to move rightward, thereby conveying the duck eggs forward. The accompanying figure shows a pulley-type structure without a synchronous belt installed.

[0023] Preferably, the right sidewall of the housing 10 is provided with N discharge holes 104, each of which is surrounded by a sealing seat. The sealing seat has a pyramidal discharge port that communicates with the discharge hole 104 and matches the shape of the sealing head. The sealing head extends into the discharge port to seal the discharge port, thereby blocking the discharge hole 104. Alternatively, the right sidewall of the housing 10 is provided with N discharge holes 104, each of which is provided with a guide seat 401. The guide seat 401 has a chute, and a sealing plate 402 driven by a cylinder 403 slides within the chute. The sealing plate 402 is tightly attached to the right sidewall of the housing 10 and seals the discharge hole 104 when it descends and opens the discharge hole 104 when it ascends. N-1 is the same as the number of central shafts 30, and the roller sleeves 301 of the two central shafts 30 correspond to one discharge hole 104. Example

[0024] This embodiment mainly describes the title of the method for making preserved eggs, which is as follows: The method for preparing preserved eggs comprises the following steps: S1, cleaning and selecting, cleaning the duck eggs and selecting qualified duck eggs through light exposure; S2, making alkali mud; S3, wrapping the mud, the height of the mud is adjusted by raising and lowering the lifting cylinder in the above-mentioned mud height adjustment mechanism. When adjusting the height, a detection area is set at the gap between the outermost roller sleeve and the side wall of the box, and an ultrasonic sensor is set above the detection area. The top surface height of the mud is judged by an echo of the ultrasonic sensor to compensate for the lifting and lowering amplitude of the mud height adjustment mechanism. The remaining amount of mud is judged by the strongest echo of the ultrasonic sensor, and a prompt to add mud is given.

[0025] Preferably, the height of the mud is adjusted by raising and lowering the lifting cylinder in the above-mentioned mud height adjustment mechanism, by setting a detection area at the gap between the outermost roller sleeve and the side wall of the box, and setting an ultrasonic sensor above the detection area, and at the same time setting an ultrasonic sensor on the top of the boosting chamber. The external ultrasonic sensor is used to judge the top surface height of the mud for feedback to control the two electrically controlled valves, and the ultrasonic sensor in the boosting chamber is used to judge the amount of mud, thereby giving a prompt to add mud.

[0026] The above is a detailed introduction to the batter coating device and the method for producing preserved eggs provided by the present invention. Specific examples are used herein 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, the present invention can be improved and modified without departing from the principles of the present invention. These improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A batter coating device for producing preserved eggs, characterized in that: include: The box body is supported by a bracket and has a first accommodating chamber and a second accommodating chamber separated by a partition, and the two accommodating chambers are both provided with mud for making preserved eggs; The mud height adjustment mechanism includes two sets and is respectively arranged in the first accommodating chamber and the second accommodating chamber for adjusting the mud height on both sides; The feeding roller includes a plurality of central shafts arranged at equal intervals, which pass through the left side of the box body, the partition and the right side of the box body and are rotatably sealed with the box body and the partition. Two sections of roller sleeves with spiral side walls are provided on the surface of the roller sleeve. The two sections of roller sleeves completely wrap the central shaft parts in the first accommodating cavity and the second accommodating cavity respectively. Two adjacent roller sleeves each have a plurality of protrusions. The gap between the two protrusions is smaller than the minimum width of the preserved egg. The two protrusions form a protrusion group, and the groove formed between the two adjacent protrusion groups on the left and right is used to transport the preserved egg. A driving device, which is used to drive the central shaft to rotate in the same direction; The discharge control device includes a discharge hole provided on the right side of the box body, a cylinder provided on the right side wall of the box body and linked to the mud height adjustment mechanism, and a plugging head provided on the cylinder. The plugging head extends into the discharge hole under the drive of the cylinder to block the discharge hole. The partition is provided with a through hole for the preserved eggs to pass through.

2. The batter coating device for preserved egg production according to claim 1, characterized in that: The mud height adjustment mechanism includes a lifting cylinder and a piston plate arranged at the output end of the lifting cylinder. The piston plates are respectively located in the first accommodating chamber and the second accommodating chamber and are respectively slidingly sealed with the cavity walls of the first accommodating chamber and the second accommodating chamber. The lifting cylinder drives the piston plate to rise and fall to adjust the height of the mud top surface.

3. The batter coating device for preserved egg production according to claim 1, characterized in that: The mud height adjustment mechanism includes a first pressurizing chamber arranged at the side wall of the first accommodating chamber and connected to the first accommodating chamber, a second pressurizing chamber arranged at the side wall of the second accommodating chamber and connected to the second accommodating chamber, and two sets of pneumatic pressurization and pressure relief devices. Mud is arranged in the first pressurizing chamber and the second pressurizing chamber. The two sets of pneumatic pressurization and pressure relief devices are respectively connected to the first pressurizing chamber and the second pressurizing chamber to pressurize and relieve the pressure of the first pressurizing chamber and the second pressurizing chamber; the first accommodating chamber and the first pressure chamber, the second accommodating chamber and the second pressure chamber are all connected at the bottom.

4. The batter coating device for preserved egg production according to claim 3, characterized in that: The gas-type pressurized pressure relief device includes an air source station, a boost pipe and a pressure relief pipe. One end of the boost pipe and the pressure relief pipe are connected to the top of the corresponding pressurized chamber, and the other end of the boost pipe is connected to the air source station. Both the boost pipe and the pressure relief pipe are provided with electric control valves to control the on and off of the two pipelines.

5. The batter coating device for preserved egg production according to claim 1, characterized in that: The driving device includes a driving motor, pulleys arranged on the end of the central shaft and the output shaft of the driving motor, a synchronous belt meshed with each pulley, and a plurality of rollers for pressing down the outer side wall of the synchronous belt to make the synchronous belt S-shaped. The driving motor drives each central shaft to rotate synchronously in the same direction through the pulleys and the synchronous belt; or the driving device includes a driving motor and a first gear arranged at the end of the central shaft, adjacent first gears are transmitted by transmission gears and one of the first gears is driven by the driving motor.

6. The batter coating device for preserved egg production according to claim 1, characterized in that: There are N discharge holes on the right side wall of the box body, and a sealing seat surrounding the discharge holes is provided at the discharge holes. The sealing seat has a pyramid-shaped discharge port, the discharge port is connected with the discharge hole, and the shape of the discharge port is consistent with the shape of the sealing head. The sealing head extends into the discharge port to seal the discharge port and blocks the discharge hole; or there are N discharge holes on the right side wall of the box body, and a guide seat is provided at the discharge hole, a slide groove is provided on the guide seat, and a sealing plate driven by a cylinder is sliding in the slide groove. The sealing plate is tightly attached to the right side wall of the box body and blocks the discharge hole when it descends and opens the discharge hole when it rises.

7. A method for preparing preserved eggs, characterized in that: The following steps are involved: S1, cleaning and selecting, cleaning the duck eggs and selecting qualified duck eggs through light exposure; S2, making alkali mud; S3, coating with mud, using the coating device for preserved eggs according to any one of claims 1 to 6, firstly, using the mud height adjustment mechanism to raise the mud height in the first and second accommodating chambers to the point where the roller sleeve is submerged and exceeds by more than 5 cm, then adding the qualified duck eggs selected in step S1 into the first accommodating chamber, then using the mud height adjustment mechanism to lower the mud height to a range between the center height of the central shaft and the maximum outer diameter of the roller sleeve, finally, starting the driving device to drive the central shaft to rotate and convey the preserved eggs forward for coating with mud, wherein when the mud height in the first and second accommodating chambers is raised to the point where the roller sleeve is submerged and exceeds by more than 5 cm, the discharge hole is blocked by the discharge control device to prevent the mud from overflowing from the discharge hole; S4, wrapping with rice husk or sawdust, wrapping the surface of the duck egg after wrapping with mud with a layer of rice husk or sawdust; S5, sealed fermentation, the duck eggs treated in S4 are placed in a sealed and 20-25 degree environment for fermentation for 25-35 days; S6, peel and store. Remove the mud shell of the fermented preserved eggs, air-dry them for 1-2 days and then refrigerate them.

8. The method for making preserved eggs according to claim 7, characterized in that: The height of the mud is adjusted by raising and lowering the lifting cylinder in the mud height adjustment mechanism described in claim 2. When adjusting the height, a detection area is set at the gap between the outermost roller sleeve and the side wall of the box, and an ultrasonic sensor is set above the detection area. The top surface height of the mud is judged by an echo from the ultrasonic sensor to compensate for the lifting and lowering amplitude of the mud height adjustment mechanism. The remaining amount of mud is judged by the strongest echo of the ultrasonic sensor, so as to give a prompt to add mud.

9. The method for making preserved eggs according to claim 7, characterized in that: The height of the mud is adjusted by raising and lowering the lifting cylinder in the mud height adjustment mechanism described in claim 3, by setting a detection area at the gap between the outermost roller sleeve and the side wall of the box, and setting an ultrasonic sensor above the detection area, and at the same time setting an ultrasonic sensor on the top of the boost chamber. The external ultrasonic sensor is used to judge the top surface height of the mud for feedback to control the two electrically controlled valves, and the ultrasonic sensor in the boost chamber is used to judge the amount of mud, thereby giving a prompt to add mud.

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