Sausage casing filling equipment and filling method for juice-exploded sausages

Abstract

The invention discloses sausage casing filling equipment and a filling method for sausages with juice exploded, and belongs to the technical field of sausage casing filling. A second storage bin used for storage is formed in a second side box, an automatic pushing and injecting system B is installed at the bottom of a first storage bin and connected with a piston in a filling tank, and a second storage bin used for storage is installed at the bottom of the second storage bin; pushing and injecting operation of the juice-exploded sausage material in the filling tank is realized through the automatic pushing and injecting system B; and a cleaning system C is installed in the second storage bin, penetrates into the first storage bin, is connected with the piston, injects cleaning liquid into the filling tank and acts together with the automatic pushing and injecting system B to be used for automatic cleaning operation of the filling tank. Accurate pushing and injecting of the filling system, stable driving of the pushing and injecting system and automatic efficient cleaning of the cleaning system cooperate with one another, so that the filling process is accurate and efficient, cleaning is automatic and thorough, the equipment operation efficiency and safety and the product quality are improved, and manual intervention is reduced.

Description

Technical Field

[0001] This invention relates to the field of sausage casing filling technology, and in particular to a casing filling device and filling method for juicy sausages. Background Technology

[0002] Hydraulic sausage stuffer: It provides stable pressure (0.3-1.0MPa) through a hydraulic system. The pressure is adjustable and can be adapted to casings of different elasticity (such as collagen casings which require lower pressure, and natural pig casings which require moderate pressure). This avoids excessive squeezing that could cause the casings to break, ensuring that the filling is full and the juices are retained.

[0003] Filling Method: Casing Pretreatment: Soak in 30-40℃ warm water for 30-60 minutes to remove salt and impurities. Rinse and drain. If necessary, apply a small amount of edible oil to lubricate the inner wall to prevent damage during filling. After checking for damage, preheat according to type (collagen casings need to be soaked in 50-60℃ warm water for 1-2 minutes to soften) or directly insert the filling nozzle, ensuring the inner wall is smooth and wrinkle-free. Filling Preparation: The filling needs to be mixed evenly, and the temperature should be controlled at 4-10℃ (to prevent the oil from melting and causing the filling to become less fluid). The granular minced meat needs to maintain a certain elasticity (avoid over-chopping to prevent juice loss). Reserved filling should be covered and refrigerated to prevent temperature rise. Equipment Adjustment: Install the corresponding specification filling nozzle (diameter slightly smaller than the inner diameter of the casing after shrinkage), adjust the filling pressure (0.3-0.5MPa for natural casings, 0.5-0.8MPa for artificial casings), filling speed (10-30 segments / minute, adjusted according to casing strength), and card spacing (usually 10-15cm).

[0004] Filling operation: Evenly place the pre-treated sausage casing onto the filling nozzle, fix the end, start the equipment, and the filling will continuously enter the casing under pressure / vacuum. At the same time, the filling nozzle will slowly retract (in coordination with the casing feeding speed) to keep the casing naturally stretched without stretching. Monitor the filling volume in real time and adjust it by sensor or manual observation to ensure that the weight deviation of each sausage segment is ≤5% to avoid overfilling, which may cause the casing to break, or being too loose, which may cause voids.

[0005] When the sausage casing filling equipment for bursting juice uses hydraulic and vacuum systems, the hydraulic system includes pipelines, valves, seals, etc., while the vacuum system involves vacuum pumps, cavities and connecting pipes. There are dead corners and gaps inside, where meat paste and juices can easily adhere and remain. In particular, highly viscous raw materials can easily clog tiny channels.

[0006] Thorough cleaning requires disassembling numerous components (such as hydraulic cylinders, vacuum suction cups, and sealing rings). Disassembly and reassembly are time-consuming and labor-intensive, increasing downtime and reducing production efficiency. Sausage raw materials contain protein and fat, which are prone to oxidation, spoilage, and bacterial growth if residues remain. Furthermore, hydraulic oil may come into contact with the raw materials, forming grease deposits that require repeated rinsing with specialized cleaning agents. Some components (such as precision valves) require manual wiping, and incomplete cleaning can easily lead to cross-contamination.

[0007] Frequent disassembly may cause wear on seals and loosening of pipe interfaces, affecting the sealing performance of the hydraulic / vacuum system and potentially leading to equipment failure in the long term. At the same time, water or cleaning agents should be prevented from entering the motor and control system during the cleaning process, which increases the difficulty of operation. Summary of the Invention

[0008] The main objective of this invention is to provide a casing filling device and filling method for juicy sausages, which can effectively solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A casing filling device and filling method for a juicy sausage includes a first side box, a second side box, a filling tank, and a filling nozzle. The filling nozzle is installed at the upper outlet of the filling tank, and the filling tank is installed on the first side box by a clamp. A second side box is installed on the side wall of the first side box, and a first storage compartment for storage is formed inside the first side box, and a second storage compartment for storage is formed inside the second side box. An automated injection system B is installed at the bottom of the first storage compartment. The automated injection system B is connected to the piston inside the filling tank, and the injection operation of the juicy sausage material inside the filling tank is realized through the automated injection system B. The second storage compartment is equipped with a cleaning system C, which extends into the first storage compartment and is connected to a piston to inject cleaning fluid into the filling tank. The cleaning system C works in conjunction with the automated injection system B to automate the cleaning operation of the filling tank.

[0010] As an optional solution of this application, the automated injection system B includes a fixed plate and a drive motor. The bottom of the first storage compartment is equipped with a fixed plate, and multiple bearing assemblies are installed on the end face of the fixed plate. A motion rack assembly is provided in the limiting groove of the fixed plate. A docking gear assembly and a transmission gear assembly are installed on the multiple bearing assemblies. The docking gear assembly is meshed with the motion rack assembly, and the transmission gear assembly is meshed with the docking gear assembly. The shaft of the transmission gear assembly is inserted into the second storage compartment. A drive motor is installed in the second storage compartment and is connected to the shaft of the transmission gear assembly. As an optional solution of this application, the first side box and the second side box are provided with mounting holes, and the mounting holes of the first side box and the second side box are connected to a sealed protective cover. The sealed protective cover is used to cover the automated injection system B to improve the protection performance. A top insert is installed on the top of the first side box. The top insert cooperates with the half clamp to achieve stable installation of the filling tank. As an optional solution of this application, the fixing plate is installed on the first side box by bolts, the bearing assembly includes a bearing seat and a bearing, the bearing is installed on the bearing seat by bolts, the bearing seat is fixed on the fixing plate by bolts, the shafts of the docking gear assembly and the transmission gear assembly are both inserted into the bearing assembly, and the docking gear assembly and the transmission gear assembly are designed in parallel, the docking gear assembly is provided with two sets of gears, one set of gears meshes with the moving rack assembly, and the other set of gears meshes with the transmission gear assembly gears; As an optional solution of this application, the drive motor is bolted to the second side box, and an adapter is provided between the drive motor and the transmission gear assembly. The adapter is a reducer, and the output end of the reducer is connected to the shaft of the transmission gear assembly by bolts. As an optional solution of this application, the cleaning system C includes a cleaning fluid storage tank and a drain hose. The cleaning fluid storage tank is installed inside the second storage compartment, and the lower end of the cleaning fluid storage tank is connected to a drain port, and the lower end of the drain port is connected to a drain hose. As an optional solution of this application, the cleaning fluid storage tank is mounted on the second side box by a bracket, and the cleaning fluid storage tank and the drain port are connected by a flange. An electric control valve is installed on the drain port, and the opening and closing of the outlet of the cleaning fluid storage tank is realized by the electric valve. The drain hose is connected to the drain port by a flange. As an optional solution of this application, the outermost end of the drain hose is provided with a nozzle, which is placed on the piston of the filling tank. The liquid is sprayed into the filling tank through the nozzle. The linear actuator includes an electric push rod, which is mounted on the second side box through a hinge seat. The telescopic end of the electric push rod is connected to a push piston through the hinge seat. The extension and retraction of the electric push rod realizes the pushing of liquid in the cleaning fluid storage tank.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The filling system uses a threaded filling nozzle and precise injection control to achieve accurate filling of the juicy sausage material, ensuring filling precision. The injection system is driven by a drive motor via a planetary reducer and rack and pinion transmission to drive the piston linearly, achieving precise and stable control of the injection process and improving filling efficiency and accuracy.

[0012] The cleaning system controls the metered cleaning fluid through a normally closed electronically controlled valve, and a fan-shaped nozzle covers the piston surface. The reciprocating motion of the piston assists in brushing, achieving efficient and thorough automatic cleaning of the filling tank.

[0013] The precise dispensing of the filling system, the stable drive of the dispensing system, and the automatic and efficient cleaning of the cleaning system work together to achieve precise and efficient filling, thorough automated cleaning, improve equipment operating efficiency, safety and product quality, and reduce manual intervention. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the overall structure of the present invention; Figure 3 The diagram shows the filling tank, automated dispensing system B, and cleaning system C of this invention. Figure 4 This is a schematic diagram of the filling tank, automated injection system B, and cleaning system C of the present invention; Figure 5 for Figure 3 Enlarged diagram of point A in the middle.

[0015] In the diagram: 1. First side box; 2. Mounting holes; 3. Encapsulated protective cover; 4. Second side box; 5. Top insert; 6. Clamp; 7. Filling tank; 8. Filling nozzle; 9. First storage compartment; 10. Second storage compartment; 11. Cleaning fluid storage tank; 12. Fixing plate; 13. Drive motor; 14. Bearing assembly; 15. Kinematic rack assembly; 16. Connecting gear assembly; 17. Transmission gear assembly; 18. Adapter; 19. Linear actuator; 20. Drain port; 21. Drain hose. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0017] like Figure 1 - Figure 5 As shown, a casing filling device and filling method for a juicy sausage includes a first side box 1, a second side box 4, a filling tank 7, and a filling nozzle 8. The filling nozzle 8 is fixedly installed at the upper outlet of the filling tank 7 by means of a threaded connection. The filling tank 7 is fastened to the upper mounting surface of the first side box 1 by means of a clamp 6. The side wall of the first side box 1 is welded to the second side box 4. The interior of the first side box 1 forms a first storage compartment 9 for storing mechanical parts, while the interior of the second side box 4 forms a second storage compartment 10 for housing the drive and cleaning units. An automated injection system B is installed at the bottom of the first storage compartment 9. This system is connected to the piston inside the filling tank 7 via a linkage rod, enabling precise injection and filling control of the juicy sausage material. The second storage compartment 10 is equipped with a cleaning system C. The spraying component of the system penetrates into the first storage compartment 9 and is connected to the piston structure. It can inject cleaning liquid into the filling tank 7 in a metered manner. Through the coordinated action with the automated injection system B, the filling tank 7 is cleaned efficiently and automatically.

[0018] The automated injection system B mainly includes a fixed plate 12 and a drive motor 13. The fixed plate 12 is bolted to the bottom of the first storage compartment 9, and its surface is equipped with multiple bearing assemblies 14. A limit groove is formed in the middle of the fixed plate 12, in which a moving rack assembly 15 is installed. Each of the multiple bearing assemblies 14 is respectively equipped with a mating gear assembly 16 and a transmission gear assembly 17. The mating gear assembly 16 and the moving rack assembly 15 form a meshing transmission, while the transmission gear assembly 17 meshes with the mating gear assembly 16. The shaft of the transmission gear assembly 17 extends into the second storage compartment 10 and is connected to the output shaft of the drive motor 13 via a coupling. Both the first side box 1 and the second side box 4 are provided with multiple sets of mounting holes 2. These holes are used to install a sealed protective cover 3, which can completely cover the automated dispensing system B, significantly improving the safety protection level during equipment operation. The top of the first side box 1 is also provided with a top insert 5, which has an arc-shaped structure that matches the half-side clamp 6, together holding the filling tank 7 to achieve a stable installation. The fixing plate 12 is fixed to the base of the first side box 1 by high-strength bolts. The bearing assembly 14 includes a cast iron bearing housing and a deep groove ball bearing. The bearing is installed in the bearing housing by press fitting, and the bearing housing is fixed to the fixing plate 12 by bolts. The shaft ends of the mating gear assembly 16 and the transmission gear assembly 17 are respectively assembled to the inner rings of the bearings, and their axes remain parallel. The mating gear assembly 16 adopts a double gear structure, in which one stage meshes with the moving rack assembly 15, and the other stage meshes with the transmission gear assembly 17. The drive motor 13 is mounted on the inner wall of the second side box 4 via a motor mount and bolts. An adapter 18 is provided between its output shaft and the shaft of the transmission gear assembly 17. The adapter 18 is a planetary reducer, which is reliably connected to the motor output shaft and the transmission shaft respectively by key connection and bolt fastening. The cleaning system C includes a cleaning fluid storage tank 11 and a drain hose 21. The cleaning fluid storage tank 11 is fixed in the second storage compartment 10 by a bracket, and has a drain port 20 at its bottom. The lower end of the drain port 20 is connected to the drain hose 21 by a flange. The cleaning fluid storage tank 11 is installed inside the second side box 4 with the aid of a steel bracket. The cleaning fluid storage tank 11 and the drain port 20 are connected by a flange seal. A normally closed electric control valve is installed on the drain port 20 to control the addition and cutoff of the cleaning fluid. The outlet end of the drain hose 21 is equipped with a fan-shaped nozzle, which is fixedly pointed to the piston surface of the filling tank 7, so as to cover a larger cleaning area. The linear actuator 19 adopts an electric push rod structure. Its base is installed inside the second side box 4 through a hinge seat. The end of the push rod is connected to the piston pushing mechanism through another set of hinges. The constant pressure push of the cleaning fluid is achieved by the extension and retraction of the push rod.

[0019] The casing filling method for the juicy sausage is as follows: S1: Fix the filling tank 7 to the top insert 5 of the first side box 1 using clamps 6 to ensure stable installation of the filling tank 7. S2: Fill the filling tank 7 with juicy sausage material, and ensure that the filling nozzle 8 is installed in place after completion. S3: Start the drive motor 13 in the second storage compartment 10, which drives the transmission gear assembly 17 to rotate through the reducer of the adapter 18. The transmission gear assembly 17 meshes with the docking gear assembly 16, which in turn meshes with the moving rack assembly 15 to move along the limiting groove of the fixed plate 12, pushing the piston in the filling tank 7 upward and squeezing the material out of the filling nozzle 8 to achieve casing filling. S4: Start the cleaning system C, open the drain port 20 electric control valve, and the electric push rod of the linear actuator 19 in the second storage compartment 10 extends and retracts to push the cleaning liquid in the cleaning liquid storage tank 11, which is sprayed into the filling tank 7 through the nozzle on the piston via the drain hose 21; at the same time, the automatic injection system B drives the piston to move, and works with the cleaning liquid to thoroughly clean the inner wall of the filling tank 7. The filling method mainly includes the following steps: the drive motor 13 drives the transmission gear assembly 17 and the docking gear assembly 16 to rotate, thereby driving the motion rack assembly 15 to move linearly and push the piston to complete the filling of the material; after filling, the cleaning system C is started, the electric control valve is opened, the cleaning liquid is sprayed into the tank through the nozzle, and at the same time the push injection system drives the piston to reciprocate to assist in brushing and achieve thorough cleaning of the tank.

[0020] The side wall of the first side box 1 is welded to the second side box 4 to form an integral frame; multiple sets of mounting holes 2 in the two boxes are used to install encapsulated protective covers 3. The fixing plate 12 is fixed to the base of the first side box 1 (bottom of the first storage compartment 9) by means of high-strength bolts; the bearing assembly 14 (including cast iron bearing housing and deep groove ball bearing) is fixed to the fixing plate 12 by bolts, and the bearing is installed in the bearing housing by press fitting; the shaft ends of the mating gear assembly 16 and the transmission gear assembly 17 are respectively assembled on the inner ring of the bearing (axis parallel), wherein the first stage of the mating gear assembly 16 (double gear structure) meshes with the moving rack assembly 15, and the other stage meshes with the transmission gear assembly 17; the drive motor 13 is installed on the inner wall of the second side box 4 by means of motor housing and bolts, and the output shaft is connected to the shaft of the transmission gear assembly 17 via the adapter 18 (planetary reducer, key connection + bolt fastening). The cleaning fluid storage tank 11 is fixed inside the second storage compartment 10 by a steel bracket. The bottom drain port 20 (including a normally closed electric control valve) is connected to the drain hose 21 via a flange. The outlet end of the hose is equipped with a fan-shaped nozzle (pointing to the piston surface of the filling tank 7). The base of the linear actuator 19 (electric push rod) is installed inside the second side box 4 via a hinge seat. The end of the push rod is connected to the piston pushing mechanism via a hinge. The top insert 5 (arc-shaped structure) at the top of the first side box 1 matches the half-side clamp 6, together hugging the filling tank 7, and is fastened to the upper mounting surface of the first side box 1 by the clamp 6. The filling nozzle 8 is fixed to the upper outlet of the filling tank 7 by a threaded connection. The sealed protective cover 3 is installed through the mounting hole 2 to completely cover the automated injection system B.

[0021] During filling, the drive motor 13 is started, and the output shaft drives the transmission gear assembly 17 to rotate via the adapter 18 (planetary reducer). The transmission gear assembly 17 meshes with the docking gear assembly 16 (double gear), which in turn drives the motion rack assembly 15 to move linearly along the limiting groove of the fixed plate 12. The motion rack assembly 15 pushes the piston inside the filling tank 7, accurately pushing the material through the filling nozzle 8 to complete the filling.

[0022] During cleaning, after filling is completed, the cleaning system C is activated, and the normally closed electrically controlled valve of the drain port 20 is opened. The cleaning fluid is sprayed from the cleaning fluid storage tank 11 through the drain hose 21 and the fan-shaped nozzle into the filling tank 7 (covering the piston surface). At the same time, the automated injection system B is activated, and the drive motor 13 drives the transmission gear assembly 17, the docking gear assembly 16, and the moving rack assembly 15, causing the piston to reciprocate along the inner wall of the filling tank 7, which, together with the cleaning fluid, achieves thorough cleaning of the tank.

[0023] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A casing filling device for a juicy sausage, comprising a first side box (1), a second side box (4), a filling tank (7), and a filling nozzle (8), wherein the filling nozzle (8) is installed at the upper outlet of the filling tank (7), and the filling tank (7) is installed on the first side box (1) by a clamp (6), characterized in that: The side wall of the first side box (1) is equipped with a second side box (4), and a first storage compartment (9) for storage is formed inside the first side box (1), and a second storage compartment (10) for storage is formed inside the second side box (4). An automatic injection system B is installed at the bottom of the first storage compartment (9). The automatic injection system B is connected to the piston inside the filling tank (7). The injection operation of the juicy sausage material inside the filling tank (7) is realized through the automatic injection system B. The second storage compartment (10) is equipped with a cleaning system C, which is inserted into the first storage compartment (9) and connected to a piston. The cleaning system C injects cleaning fluid into the filling tank (7) and works together with the automated injection system B for the automated cleaning operation of the filling tank (7).

2. The casing filling equipment for a juicy sausage according to claim 1, characterized in that: The automated injection system B includes a fixed plate (12) and a drive motor (13). The fixed plate (12) is installed at the bottom of the first storage compartment (9), and multiple bearing assemblies (14) are installed on the end face of the fixed plate (12). A moving rack assembly (15) is provided in the limiting groove of the fixed plate (12). A docking gear assembly (16) and a transmission gear assembly (17) are installed on the multiple bearing assemblies (14). The docking gear assembly (16) is meshed with the moving rack assembly (15), and the transmission gear assembly (17) is meshed with the docking gear assembly (16). The shaft of the transmission gear assembly (17) is inserted into the second storage compartment (10). The drive motor (13) is installed in the second storage compartment (10), and the drive motor (13) is connected to the shaft of the transmission gear assembly (17).

3. The casing filling equipment for a juicy sausage according to claim 2, characterized in that: The first side box (1) and the second side box (4) are provided with mounting holes (2), and the mounting holes (2) of the first side box (1) and the second side box (4) are connected with encapsulated protective covers (3). The encapsulated protective covers (3) are used to cover the automated injection system B to improve the protection performance. The top of the first side box (1) is equipped with a top insert (5). The top insert (5) cooperates with the half clamp (6) to realize the stable installation of the filling tank (7).

4. The casing filling equipment for a juicy sausage according to claim 3, characterized in that: The fixing plate (12) is bolted to the first side box (1). The bearing assembly (14) includes a bearing seat and a bearing. The bearing is bolted to the bearing seat and the bearing seat is bolted to the fixing plate (12). The shafts of the docking gear assembly (16) and the transmission gear assembly (17) are inserted into the bearing assembly (14). The docking gear assembly (16) and the transmission gear assembly (17) are designed in parallel. The docking gear assembly (16) is provided with two sets of gears. One set of gears meshes with the moving rack assembly (15) and the other set of gears meshes with the transmission gear assembly (17).

5. The casing filling equipment for a juicy sausage according to claim 4, characterized in that: The drive motor (13) is bolted to the second side box (4). An adapter (18) is provided between the drive motor (13) and the transmission gear assembly (17). The adapter (18) is a reducer, and the output end of the reducer is connected to the shaft of the transmission gear assembly (17) by bolts.

6. The casing filling equipment for a juicy sausage according to claim 5, characterized in that: The cleaning system C includes a cleaning fluid storage tank (11) and a drain hose (21). The cleaning fluid storage tank (11) is installed in the second storage compartment (10), and the lower end of the cleaning fluid storage tank (11) is connected to a drain port (20). The lower end of the drain port (20) is connected to a drain hose (21).

7. The casing filling equipment for a juicy sausage according to claim 6, characterized in that: The cleaning fluid storage tank (11) is mounted on the second side box (4) by a bracket, and the cleaning fluid storage tank (11) and the drain port (20) are connected by a flange. An electric control valve is installed on the drain port (20) to open and close the outlet of the cleaning fluid storage tank (11) by an electric valve. The drain hose (21) is connected to the drain port (20) by a flange.

8. The casing filling equipment for a juicy sausage according to claim 7, characterized in that: The outermost end of the drain hose (21) is provided with a nozzle, which is placed on the piston of the filling tank (7). The liquid is sprayed into the filling tank (7) through the nozzle. The linear actuator (19) includes an electric push rod, which is mounted on the second side box (4) through a hinge seat. The telescopic end of the electric push rod is connected to a push piston through the hinge seat. The extension and retraction of the electric push rod realizes the pushing of liquid in the cleaning liquid storage tank (11).

9. The casing filling method for a juicy sausage according to claim 8, characterized in that: S1: Fix the filling tank (7) to the top insert (5) of the first side box (1) by means of clamp (6) to ensure that the filling tank (7) is installed stably; S2: Fill the filling tank (7) with the juicy sausage material, and ensure that the filling nozzle (8) is installed in place after completion; S3: Start the drive motor (13) in the second storage compartment (10), drive the transmission gear assembly (17) to rotate through the adapter (18) (reducer), the transmission gear assembly (17) meshes with the docking gear assembly (16), the docking gear assembly (16) meshes with the motion rack assembly (15) to move along the limiting groove of the fixed plate (12), push the piston in the filling tank (7) to move upward, squeeze the material out from the filling nozzle (8) to realize casing filling; S4: Start the cleaning system C, open the drain port (20) electric control valve, the linear actuator (19) (electric push rod) in the second storage compartment (10) extends and retracts to push the cleaning fluid in the cleaning fluid storage tank (11), and sprays it into the filling tank (7) through the nozzle on the piston via the drain hose (21); at the same time, the automatic injection system (B) drives the piston to move, and cooperates with the cleaning fluid to thoroughly clean the inner wall of the filling tank (7).

Images