An integrated pasteurizer

By designing an integrated pasteurization machine with rotating and cleaning components, automatic cleaning of the disinfection tank is achieved, solving the problem of water residue and ensuring disinfection effectiveness and equipment lifespan.

CN224484549UActive Publication Date: 2026-07-14YIBIN YOURUN AGRICULTURAL TECHNOLOGY CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
YIBIN YOURUN AGRICULTURAL TECHNOLOGY CO LTD
Filing Date
2025-06-27
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing pasteurization machines are prone to water residue after cleaning, which leads to the growth of microorganisms, affecting the disinfection effect and equipment lifespan, and increasing maintenance costs.

Method used

An integrated pasteurization machine was designed. Through the cooperation of the rotary component and the cleaning component, the inside of the sterilization tank is automatically cleaned. The machine uses hydraulic push rods, motor drive and gear transmission to drive the sponge plate to rotate and clean.

Benefits of technology

It effectively removes water stains from the disinfection tank, prevents microbial contamination, ensures disinfection effect, extends equipment life, and reduces maintenance costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an integrated pasteurization machine relates to the technical field of disinfection, including base and pasteurization jar, the upper top of base is inlayed and is equipped with heating disc, and the heating end of heating disc is placed to pasteurization jar, and the liquid discharge end fixedly connected with the drain pipe of pasteurization jar is installed with solenoid valve to the outer wall of drain pipe, and the upper top of base is fixedly connected with two hydraulic push rods in symmetry, and the telescopic end of two hydraulic push rods is provided with U -shaped support, and the lower bottom of U -shaped support is provided with rotary unit, and rotary unit can drive cleaning mechanism and jar cover to make three hundred and sixty degrees rotary motion, when needing to clean the water stain remaining in the inside of pasteurization jar, can separate jar cover with pasteurization jar, then through rotary unit and move cleaning mechanism to the position of pasteurization jar, and through the telescopic end of hydraulic push rod and drive U -shaped support to drop, thereby realize the purpose that cleaning mechanism enters the inside of pasteurization jar.
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Description

Technical Field

[0001] This utility model relates to the field of disinfection technology, specifically an integrated pasteurization machine. Background Technology

[0002] Pasteurization is a method of heating liquids to a certain temperature and maintaining it for a period of time to kill pathogens and most non-pathogenic bacteria. This method can minimize the impact on product quality. This gentle disinfection method meets the food industry's dual needs for microbial safety and quality preservation, and has gradually become a widely adopted disinfection method in many industries, promoting the development of the food industry towards high quality and health.

[0003] In existing technologies, after the pasteurization machine's sterilization tank has completed the sterilization operation and been used, it must be cleaned inside to prevent residues from affecting subsequent use. However, after cleaning, a large amount of water stains often remain inside the sterilization tank. These water stains provide a suitable breeding environment for various microorganisms, making it easy for bacteria, mold, and other microorganisms to grow inside the sterilization tank. When the sterilization tank is used again for pasteurization, the residual microorganisms will contaminate the liquid to be sterilized, resulting in a significant reduction in the sterilization effect. This cannot effectively guarantee the microbial safety of the product, seriously affecting product quality. Furthermore, the water stains may corrode the internal materials of the sterilization tank, especially metal parts, shortening its service life and increasing the company's equipment replacement and maintenance costs. Utility Model Content

[0004] Technical problems to be solved

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an integrated pasteurization machine. By setting up a rotating component and a cleaning component in cooperation, it can clean the inside of the pasteurization tank and avoid water stains.

[0006] Technical solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an integrated pasteurization machine, comprising a base and a pasteurization tank. A heating plate is embedded in the upper top of the base, and the pasteurization tank is placed on the heating end of the heating plate. A drain pipe is fixedly connected to the liquid discharge end of the pasteurization tank, and a solenoid valve is installed on the outer wall of the drain pipe. Two hydraulic push rods are symmetrically fixedly connected to the upper top of the base. A U-shaped frame is provided at the telescopic end of the two hydraulic push rods, and a rotating assembly is provided at the lower bottom end of the U-shaped frame. A cleaning mechanism for cleaning the inside of the pasteurization tank is provided inside the rotating assembly.

[0008] Preferably, the rotary assembly includes an annular bracket fixedly connected to the bottom end of the U-shaped frame. A first motor is embedded in the bottom end of the U-shaped frame. A first drive rod is fixedly connected to the output end of the first motor. A connecting plate is fixedly connected to the end of the first drive rod away from the first motor. Two connecting shafts are symmetrically fixedly connected to the bottom end of the connecting plate.

[0009] Preferably, a can lid is fixedly connected to one end of one of the connecting shafts, and two support frames are symmetrically fixedly connected to the top end of the connecting plate, with the two support frames rotatably sleeved inside the annular bracket.

[0010] Preferably, the cleaning mechanism includes a connecting plate fixedly connected to the end of another connecting shaft. The upper top of the connecting plate is fixedly connected to a second motor on one side of one of the support frames. The output end of the second motor is fixedly connected to a second drive rod. An inner bearing is embedded in the contact surface between the second drive rod and the connecting plate. The second drive rod is rotatably sleeved with the connecting plate through the inner bearing.

[0011] Preferably, the connecting disc has a second gear and a first gear rotatably connected inside, the second gear meshes with the first gear for transmission, the end of the second drive rod away from the second motor is fixedly connected to the top of the second gear, and the second drive rod is rotatably connected to the connecting disc, and a sleeve is fixedly connected to the bottom of the first gear, the sleeve being disposed through the connecting disc.

[0012] Preferably, the sleeve has an embedded electric push rod, the telescopic end of which is fixedly connected to a chassis, and a bottom sponge plate is sleeved on the outer wall of the chassis. The outer wall of the sleeve is fixedly connected to six first fixed brackets in a ring array, with three of the six first fixed brackets forming a group, and the two groups arranged vertically. The outer wall of the sleeve is also provided with three side sponge plates in a ring array. Each side sponge plate has two first fixed brackets symmetrically fixedly connected on the side closest to the sleeve. The first fixed brackets on each side sponge plate are rotatably sleeved with the first fixed brackets on the outer wall of the sleeve by a first connecting rod.

[0013] Preferably, each of the side sponge plates is fixedly connected to a second fixed bracket on the side near the sleeve, and three second fixed brackets are fixedly connected in a ring array on the outer wall of the telescopic rod of the electric push rod. The second fixed bracket on each of the side sponge plates is rotatably connected to the second fixed bracket on the telescopic rod of the electric push rod with a second connecting rod. The outer wall of the bottom sponge plate matches the inner bottom end of the pasteurization tank.

[0014] Beneficial effects:

[0015] Compared with existing technologies, this integrated pasteurization machine has the following advantages:

[0016] I. This utility model is equipped with a rotary component that can drive the cleaning mechanism and the lid to rotate 360 ​​degrees. When it is necessary to clean the water stains inside the pasteurization tank, the lid can be separated from the pasteurization tank. Then, the rotary component moves the cleaning mechanism to the position of the pasteurization tank, and the extension end of the hydraulic push rod drives the U-shaped frame to descend, thereby realizing the purpose of the cleaning mechanism entering the pasteurization tank.

[0017] II. This utility model incorporates a cleaning mechanism. When the cleaning mechanism enters the pasteurization tank, the telescopic end of the electric push rod drives three second fixed supports to cooperate with the second connecting rod, thereby enabling the three side sponge plates to move linearly. At this time, the three side sponge plates contact the inner wall of the pasteurization tank, while the outer wall of the bottom sponge plate matches the inner bottom of the pasteurization tank. Therefore, the second motor drives the second drive rod and the second gear to rotate. The second gear meshes with the first gear, driving the sleeve to rotate, thereby causing the three side sponge plates and the bottom sponge plate to rotate at a uniform speed. The side sponge plates and the bottom sponge plate clean the water stains remaining on the inner wall of the pasteurization tank, preventing them from affecting the next use.

[0018] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the bottom structure of the U-shaped frame of this utility model;

[0021] Figure 3 This is a schematic diagram of the disassembled bottom structure of the U-shaped frame of this utility model;

[0022] Figure 4 This is a schematic diagram of the cleaning mechanism structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the connecting disc in the cleaning mechanism of this utility model.

[0024] In the diagram: 1. Base; 2. Hydraulic push rod; 3. Rotary assembly; 31. U-shaped frame; 32. Ring support; 33. First motor; 331. First drive rod; 34. Connecting plate; 341. Connecting shaft; 342. Support frame; 4. Cleaning mechanism; 41. Connecting disc; 411. Second motor; 412. Second drive rod; 413. Inner bearing; 414. First gear; 415. Second gear; 42. Sleeve; 421. First fixed bracket; 422. First connecting rod; 43. Electric push rod; 44. Chassis; 45. Bottom sponge plate; 46. Side sponge plate; 461. Second fixed bracket; 462. Second connecting rod; 5. Heating plate; 6. Pasteurizing tank; 61. Tank lid; 7. Drain pipe; 8. Solenoid valve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1 - Figure 5 As shown, this utility model provides a technical solution: an integrated pasteurization machine, including a base 1 and a pasteurization tank 6. A heating plate 5 is embedded in the upper top of the base 1, and the pasteurization tank 6 is placed on the heating end of the heating plate 5. A drain pipe 7 is fixedly connected to the liquid discharge end of the pasteurization tank 6. A solenoid valve 8 is installed on the outer wall of the drain pipe 7. Two hydraulic push rods 2 are symmetrically fixedly connected to the upper top of the base 1. A U-shaped frame 31 is provided at the telescopic end of the two hydraulic push rods 2. A rotating component 3 is provided at the lower bottom end of the U-shaped frame 31. A cleaning mechanism 4 for cleaning the inside of the pasteurization tank 6 is provided inside the rotating component 3.

[0027] It should be noted that the heating plate 5 embedded in the base 1 can precisely heat the pasteurization tank 6 placed on it, and can stably maintain the temperature required for disinfection, ensuring the disinfection effect and protecting food safety. The drain pipe 7 connected to the liquid discharge end of the pasteurization tank 6, and the solenoid valve 8 installed on the outer wall of the drain pipe 7, make the liquid discharge operation after disinfection convenient. By controlling the solenoid valve 8, the discharge time and flow rate can be precisely controlled to avoid liquid leakage or residue. The two hydraulic push rods 2 symmetrically fixed on the base 1 drive the U-shaped frame 31 to rise and fall with their telescopic ends. With the help of the rotating component 3, the cleaning mechanism 4 can be flexibly moved to a suitable position inside the pasteurization tank 6 to clean different areas inside the tank. The cleaning mechanism 4 can thoroughly clean the inner wall and bottom of the pasteurization tank 6, remove residual water stains and dirt, prevent bacterial growth, and ensure hygiene and safety for the next use.

[0028] like Figures 1-3 As shown, the rotary assembly 3 includes an annular bracket 32 ​​fixedly connected to the lower bottom end of the U-shaped frame 31. A first motor 33 is embedded in the lower bottom end of the U-shaped frame 31. A first drive rod 331 is fixedly connected to the output end of the first motor 33. A connecting plate 34 is fixedly connected to the end of the first drive rod 331 away from the first motor 33. Two connecting shafts 341 are symmetrically fixedly connected to the lower bottom end of the connecting plate 34. A can lid 61 is fixedly connected to the end of one of the connecting shafts 341. Two support frames 342 are symmetrically fixedly connected to the upper top end of the connecting plate 34, and the two support frames 342 are rotatably sleeved inside the annular bracket 32.

[0029] It should be noted that a first motor 33 is embedded at the bottom of the U-shaped frame 31, and its output end is connected to the first drive rod 331. Driven by the motor, it can provide stable and strong power for subsequent actions, ensuring that the entire rotary assembly 3 runs smoothly and reducing the risk of failure due to insufficient or unstable power. Two support frames 342 symmetrically fixed at the top of the connecting plate 34 are rotatably sleeved inside the annular bracket 32, ensuring the balance and stability of the rotary assembly 3 during operation, and can also effectively share the pressure borne by each component, extending the service life of the equipment.

[0030] like Figure 3 and Figure 4 As shown, the cleaning mechanism 4 includes a connecting plate 41 fixedly connected to the end of another connecting shaft 341. The upper top of the connecting plate 34 is fixedly connected to a second motor 411 on one side of one of the support frames 342. The output end of the second motor 411 is fixedly connected to a second drive rod 412. An inner bearing 413 is embedded in the contact surface between the second drive rod 412 and the connecting plate 34. The second drive rod 412 is rotatably sleeved with the connecting plate 34 through the inner bearing 413.

[0031] It should be noted that a connecting disc 41 is fixedly connected to the end of another connecting shaft 341, providing a stable connection foundation for the cleaning action and ensuring that the cleaning process can be carried out accurately and smoothly. A second motor 411 is fixedly installed on the top of the connecting plate 34 and on one side of one of the support frames 342. The layout is reasonable, makes full use of space, and facilitates centralized control and maintenance. The output end of the second motor 411 is connected to the second drive rod 412, providing a power source for the cleaning action and ensuring the efficient operation of the cleaning work. An inner bearing 413 is embedded in the contact surface between the second drive rod 412 and the connecting plate 34, and the second drive rod 412 is rotatably sleeved with the connecting plate 34 through the inner bearing 413. This design allows the second drive rod 412 to rotate smoothly on the connecting plate 34, greatly reducing the frictional resistance during rotation, reducing energy loss, improving transmission efficiency, reducing wear between components, and extending the service life of the mechanism.

[0032] like Figures 3-5As shown, the connecting disk 41 is rotatably fitted with a second gear 415 and a first gear 414. The second gear 415 meshes with the first gear 414 for transmission. The end of the second drive rod 412 away from the second motor 411 is fixedly connected to the upper top of the second gear 415, and the second drive rod 412 is rotatably connected to the connecting disk 41. The lower bottom end of the first gear 414 is fixedly connected to a sleeve 42, which is disposed through the connecting disk 41.

[0033] It should be noted that the second gear 415 meshes with the first gear 414 for transmission. This gear transmission method has the advantages of accurate transmission ratio and smooth operation. It can precisely control the rotation speed and direction of the first gear 414, making the cleaning action more precise and controllable, and meeting the speed and precision requirements of different cleaning scenarios. The lower end of the first gear 414 is fixedly connected to the sleeve 42, and the sleeve 42 and the connecting plate 41 are connected through each other. This structure not only provides a stable support and connection point for subsequent connection of cleaning tools, but also ensures the smoothness of the sleeve 42 when rotating, reducing jamming.

[0034] like Figures 2-5 As shown, an electric push rod 43 is embedded inside the sleeve 42. The telescopic end of the electric push rod 43 is fixedly connected to a base 44. A bottom sponge plate 45 is sleeved on the outer wall of the base 44. Six first fixing brackets 421 are fixedly connected in a ring array on the outer wall of the sleeve 42, with three first fixing brackets 421 arranged in groups of three, and the two groups are arranged vertically. Three side sponge plates 46 are arranged in a ring array on the outer wall of the sleeve 42. Two first fixing brackets 421 are symmetrically fixedly connected on the side of each side sponge plate 46 closest to the sleeve 42. Each side sponge plate 46 has... The first fixed bracket 421 and the outer wall of the sleeve 42 are rotatably connected to the first connecting rod 422. The side of each sponge plate 46 near the sleeve 42 is fixedly connected to the second fixed bracket 461. The outer wall of the telescopic rod of the electric push rod 43 is fixedly connected to three second fixed brackets 461 in a ring array. The second fixed brackets 461 on each side sponge plate 46 and the second fixed brackets 461 on the telescopic rod of the electric push rod 43 are rotatably connected to the second connecting rod 462. The outer wall of the bottom sponge plate 45 matches the inner bottom end of the pasteurization tank 6.

[0035] It should be noted that the outer wall of the chassis 44 is fitted with a bottom sponge plate 45, and the outer wall of the bottom sponge plate 45 fits into the bottom of the pasteurization tank 6. This allows for a comprehensive and close cleaning of the bottom of the sterilization tank, effectively removing stains and ensuring the cleanliness of the bottom of the sterilization tank, providing a good foundation for subsequent sterilization work. The outer wall of the sleeve 42 is equipped with six first fixed supports 421 arranged in a ring array, divided into upper and lower groups, and the side sponge plate 46 is rotatably connected to it through the first connecting rod 422. The outer wall of the electric push rod 43 is rotatably connected to the second fixed support 461 on the side sponge plate 46 through the second connecting rod 462. When the electric push rod 43 extends or retracts, it can drive the side sponge plate 46 to expand or contract. When open, the side sponge plate 46 can clean the inner wall of the sterilization tank, increasing the cleaning area; when contracted, it facilitates the storage of the equipment and passage through narrow spaces.

[0036] Working principle: After the disinfection operation is completed, if it is necessary to clean the residual water stains inside the pasteurization tank 6, the rotary component 3 will start to function. The bottom end of the U-shaped frame 31 is fixed with a ring bracket 32. The first motor 33 embedded at the bottom end of the U-shaped frame 31 starts, and the first drive rod 331 at its output end drives the connecting plate 34 to rotate, which in turn drives the two connecting shafts 341 that are symmetrically fixed to the bottom end of the connecting plate 34 to rotate. One of the connecting shafts 341 has a tank cover 61 fixed at its end. Under the drive of the rotary component 3, the tank cover 61 separates from the pasteurization tank 6.

[0037] At the same time, the rotary assembly 3 moves the cleaning mechanism 4 to the pasteurization tank 6 position. The two hydraulic push rods 2, which are symmetrically fixed at the top of the base 1, are activated. Their telescopic ends drive the U-shaped frame 31 to descend, so that the cleaning mechanism 4 enters the pasteurization tank 6. After the cleaning mechanism 4 enters the pasteurization tank 6, the electric push rod 43 embedded in the sleeve 42 is activated. Its telescopic end drives the chassis 44 to move, which in turn drives the bottom sponge plate 45, which is sleeved with the outer wall of the chassis 44, to move.

[0038] Simultaneously, the telescopic end of the electric push rod 43 drives the three second fixed brackets 461 to move, which are rotatably connected to the second fixed brackets 461 on the side sponge plate 46 through the second connecting rod 462. The side sponge plate 46 is also rotatably connected to the first fixed bracket 421 on the outer wall of the sleeve 42 through the first connecting rod 422. This causes the three side sponge plates 46 to move linearly and contact the inner wall of the pasteurization tank 6, while the outer wall of the bottom sponge plate 45 matches the bottom of the pasteurization tank 6. At this time, the second motor 411 fixedly connected to the top of the connecting plate 34 starts, and the second drive rod 412 at its output end drives the second gear 415 to rotate. Because the second gear 415 meshes with the first gear 414, the sleeve 42 fixed at the bottom of the first gear 414 rotates accordingly, thereby driving the three side sponge plates 46 and the bottom sponge plate 45 to rotate at a uniform speed. The side sponge plates 46 and the bottom sponge plate 45 clean the water stains remaining on the inner wall of the pasteurization tank 6 to avoid affecting the next use.

[0039] It should be noted that in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "fixed," "installed," "connected," and "linked" should be interpreted broadly. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "linked" can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated pasteurization machine, comprising a base (1) and a pasteurization tank (6), characterized in that: A heating plate (5) is embedded at the top of the base (1). The pasteurization tank (6) is placed at the heating end of the heating plate (5). A drain pipe (7) is fixedly connected to the liquid discharge end of the pasteurization tank (6). A solenoid valve (8) is installed on the outer wall of the drain pipe (7). Two hydraulic push rods (2) are symmetrically fixedly connected at the top of the base (1). A U-shaped frame (31) is provided at the telescopic end of the two hydraulic push rods (2). A rotating assembly (3) is provided at the bottom end of the U-shaped frame (31). A cleaning mechanism (4) for cleaning the inside of the pasteurization tank (6) is provided inside the rotating assembly (3).

2. The integrated pasteurization machine according to claim 1, characterized in that: The rotary assembly (3) includes an annular bracket (32) fixedly connected to the bottom end of the U-shaped frame (31). The bottom end of the U-shaped frame (31) is fitted with a first motor (33). The output end of the first motor (33) is fixedly connected to a first drive rod (331). The end of the first drive rod (331) away from the first motor (33) is fixedly connected to a connecting plate (34). The bottom end of the connecting plate (34) is symmetrically fixedly connected to two connecting shafts (341).

3. The integrated pasteurization machine according to claim 2, characterized in that: One of the connecting shafts (341) is fixedly connected to a can lid (61) at one end, and two support frames (342) are symmetrically fixedly connected to the top of the connecting plate (34), and the two support frames (342) are rotatably sleeved inside the annular bracket (32).

4. The integrated pasteurization machine according to claim 3, characterized in that: The cleaning mechanism (4) includes a connecting plate (41) fixedly connected to the end of another connecting shaft (341). The upper top of the connecting plate (34) is fixedly connected to a second motor (411) on one side of one of the support frames (342). The output end of the second motor (411) is fixedly connected to a second drive rod (412). An inner bearing (413) is embedded in the contact surface between the second drive rod (412) and the connecting plate (34). The second drive rod (412) is rotatably sleeved with the connecting plate (34) through the inner bearing (413).

5. The integrated pasteurization machine according to claim 4, characterized in that: The connecting disc (41) is internally fitted with a second gear (415) and a first gear (414), which mesh and drive each other. The end of the second drive rod (412) away from the second motor (411) is fixedly connected to the top of the second gear (415), and the second drive rod (412) is rotatably connected to the connecting disc (41). The bottom end of the first gear (414) is fixedly connected to a sleeve (42), which passes through the connecting disc (41).

6. The integrated pasteurization machine according to claim 5, characterized in that: An electric push rod (43) is embedded inside the sleeve (42). The telescopic end of the electric push rod (43) is fixedly connected to a chassis (44). A bottom sponge plate (45) is sleeved on the outer wall of the chassis (44). Six first fixed supports (421) are fixedly connected in a ring array on the outer wall of the sleeve (42). The six first fixed supports (421) are arranged in groups of three, and the two groups are arranged vertically. Three side sponge plates (46) are arranged in a ring array on the outer wall of the sleeve (42). Two first fixed supports (421) are symmetrically fixedly connected on the side of each side sponge plate (46) near the sleeve (42). A first connecting rod (422) is rotatably sleeved on the first fixed support (421) on the side sponge plate (46) and the first fixed support (421) on the outer wall of the sleeve (42).

7. An integrated pasteurization machine according to claim 6, characterized in that: Each of the side sponge plates (46) is fixedly connected to a second fixed bracket (461) on the side near the sleeve (42). The outer wall of the telescopic rod of the electric push rod (43) is fixedly connected to three second fixed brackets (461) in a ring array. The second fixed bracket (461) on each of the side sponge plates (46) is rotatably connected to the second fixed bracket (461) on the telescopic rod of the electric push rod (43) with a second connecting rod (462). The outer wall of the bottom sponge plate (45) matches the inner bottom end of the pasteurization tank (6).