Device with functions of cleaning and disinfecting portable milk barrel

Abstract

The utility model relates to the technical field of cleaning and disinfection of milk barrels, in particular to a device with functions of cleaning and disinfecting a portable milk barrel. Comprising an alkali washing tank assembly and a sterilization tank assembly, and each of the alkali washing tank assembly and the sterilization tank assembly comprises a tank body with an opening in the top. After the milk barrel body is placed on the square pipe support in the alkali washing tank assembly, the rotary spray head can evenly spray clear water and an alkaline solution to the inner wall of the milk barrel body in sequence, and the clear water can clean milk stains in the milk barrel body; the alkaline solution can decompose grease, milk and other protein dirt accumulated in the using process of the milk barrel body so that milk stains and other dirt on the inner wall of the milk barrel body can be cleaned away, then the spray head is rotated, clear water is evenly sprayed to the inner wall of the milk barrel body, and the residual alkaline solution on the inner wall of the milk barrel body can be cleaned away. And the milk barrel body is prevented from being corroded by the alkaline solution, so that the milk barrel is efficiently cleaned.

Description

TECHNICAL FIELD

[0001] The utility model relates to milk bucket cleaning and disinfection technical field, specifically, relate to a device with the function of cleaning and disinfecting portable milk bucket. BACKGROUND

[0002] The cleaning of the goat milk bucket is very troublesome in the use process of the pasture or the individual farmer, because it contains more fat, protein and other nutrient components, and microorganisms breed rapidly, if it cannot be cleaned in time, it is easy to pollute the fresh goat milk.

[0003] The cleaning steps of a goat milk bucket, i.e. the milk bucket body 4 in the prior art are as follows:

[0004] 1. flushing: first, use boiling water to flush the milk bucket body 4 to remove the surface impurities and most of the bacteria.

[0005] 2. washing: use lye to wash the milk bucket body 4, which helps to remove grease and deeper stains.

[0006] 3. rinsing: rinse the milk bucket body 4 with clean water to ensure that there is no lye residue.

[0007] 4. rinsing again: finally, rinse again with boiling water to ensure that the milk bucket body 4 is completely clean and kill the possible residual bacteria, and after cleaning, ensure that the milk bucket body 4 is completely dried for next use.

[0008] The above steps all need to be completed manually by workers, the labor intensity of the workers is large, and the workers are easy to directly contact the lye and hot water when cleaning the milk bucket body 4, the lye and hot water will harm the health of the workers, at the same time, part of the milk bucket body 4 is made of ceramic, the lye used for cleaning the milk bucket body 4 is sodium hydroxide solution which has corrosion to ceramic, if the workers do not clean the lye inside the milk bucket body 4, the lye will corrode the milk bucket body 4, shorten the service life of the milk bucket body 4. UTILITY MODEL CONTENT

[0009] The utility model aims at providing a device with the function of cleaning and disinfecting portable milk bucket to solve the problems in the above background technology.

[0010] To achieve the above object, the utility model provides a device with the functions of cleaning and disinfecting hand milk bucket, including alkali cleaning tank subassembly, the one side of alkali cleaning tank subassembly is provided with sterilization tank subassembly, alkali cleaning tank subassembly and sterilization tank subassembly all include the tank body of top opening, the position of tank body inside near bottom end is fixedly installed with the electric heating tube for heating liquid, tank body one side near the position of top end is fixedly connected with the supplementary pipe, the top of tank body is fixedly provided with square tube support, the center position of square tube support lower surface is fixed with the receiving dish that is arranged in the tank body, the position of receiving dish one side near bottom end is fixedly connected with the drain pipe, the other side of receiving dish is fixedly connected with overflow pipe, the position of overflow pipe and receiving dish connection is higher than the position of drain pipe and receiving dish connection, one end of drain pipe penetrates the lateral wall of tank body and is fixedly installed with first valve body, the one side of tank body is fixedly provided with inlet pipe, the one end of inlet pipe penetrates the lateral wall of tank body, receiving dish and square tube support in proper order and is fixedly installed with rotary nozzle, inlet pipe transports clean water to rotary nozzle, when the opening of milk bucket body is placed in the center position of square tube support upper surface when the opening of milk bucket body is placed in the center position of square tube support upper surface, the rotary nozzle is located the center position in the milk bucket body, the inside of tank body is provided with circulating assembly, when first valve body is in the closed state, circulating assembly drives the liquid circulation flow in alkali cleaning tank subassembly or sterilization tank subassembly, when first valve body is in the open state, the clean water in receiving dish is discharged outward through drain pipe.

[0011] As a further improvement of the technical solution, the circulating assembly includes a bottom pipe fixedly arranged at the bottom of the tank body, a second valve body fixedly installed on the bottom pipe, and a horizontal pipe fixedly connected to the lower end of the bottom pipe. The horizontal pipe and the bottom pipe form an inverted T-shaped structure. A third valve body and a fourth valve body are fixedly installed on the horizontal pipe at positions on both sides of the bottom pipe, respectively.

[0012] As a further improvement of the technical solution, the circulating assembly further includes a centrifugal pump fixedly installed at one end of the horizontal pipe. The centrifugal pump is located close to the third valve body. A reflux pipe is fixedly connected to the side of the centrifugal pump away from the horizontal pipe. The upper end of the reflux pipe is fixedly connected to the lateral wall of the inlet pipe. A sixth valve body is fixedly installed on the reflux pipe.

[0013] As a further improvement of the technical solution, a fifth valve body is fixedly installed on the inlet pipe. The fifth valve body is arranged at one end of the inlet pipe away from the connection position of the reflux pipe and the inlet pipe, and also arranged at one end of the inlet pipe away from the rotary nozzle.

[0014] As a further improvement of the technical solution, the square tube support is a cross-shaped structure. The square tube support divides the opening of the tank body into four areas. When the opening of the milk bucket body is placed in the center position of the upper surface of the square tube support with the opening facing downward, the positions of the opening of the milk bucket body close to the edges are located directly above the four areas.

[0015] Compared with the prior art, the utility model has the beneficial effects of

[0016] 1, the device that possesses clean and disinfect portable milk bucket function, after placing the milk bucket body in the square tube support in alkali washing jar subassembly, rotating spray head can evenly spray clean water and alkaline solution to milk bucket body inner wall in proper order, clean water can clean the milk stain in milk bucket body, alkaline solution can decompose the grease, milk and other protein dirt accumulated in the use process of milk bucket body, so as to clean the milk stain and other dirt on the inner wall of milk bucket body, and then rotating spray head again evenly sprays clean water to the inner wall of milk bucket body, so as to clean the residual alkaline solution on the inner wall of milk bucket body, avoid the corrosion of alkaline solution to milk bucket body, so as to realize the efficient cleaning of milk bucket, and the worker will not contact alkaline solution in the cleaning process, improve the safety of worker in the cleaning process.

[0017] 2, the device that possesses clean and disinfect portable milk bucket function, after placing the milk bucket body in the square tube support in alkali washing jar subassembly, rotating spray head can evenly spray clean water and alkaline solution to milk bucket body inner wall in proper order, clean water can clean the milk stain in milk bucket body, alkaline solution can decompose the grease, milk and other protein dirt accumulated in the use process of milk bucket body, so as to clean the milk stain and other dirt on the inner wall of milk bucket body, and then rotating spray head again evenly sprays clean water to the inner wall of milk bucket body, so as to clean the residual alkaline solution on the inner wall of milk bucket body, avoid the corrosion of alkaline solution to milk bucket body, so as to realize the efficient cleaning of milk bucket, and the worker will not contact alkaline solution in the cleaning process, improve the safety of worker in the cleaning process. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the whole structure schematic diagram of the utility model;

[0019] Figure 2 It is the structure schematic diagram of alkali washing jar subassembly of the utility model;

[0020] Figure 3 It is the sectional view of alkali washing jar subassembly of the utility model;

[0021] Figure 4 It is the local structure schematic diagram of alkali washing jar subassembly of the utility model.

[0022] The meaning of each mark in the drawing is as follows:

[0023] 1, alkali washing jar subassembly;2, sterilization jar subassembly;

[0024] 3, jar body;31, square tube support;32, receiving dish;321, overflow pipe;33, drain pipe;34, first valve body;35, bottom pipe;36, second valve body;37, cross pipe;38, third valve body;39, fourth valve body;

[0025] 4, milk bucket body;

[0026] 5, water inlet pipe;51, fifth valve body;52, rotating spray head;

[0027] 6, electric heating pipe;7, supplementary pipe;

[0028] 8 centrifugal pump; 81 return pipe; 82 sixth valve body. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0030] Example 1

[0031] Please refer to Figures 1-4The purpose of the present embodiment is to provide a device with cleaning and disinfecting functions, which comprises an alkali washing tank assembly 1 and a sterilization tank assembly 2. The alkali washing tank assembly 1 and the sterilization tank assembly 2 each comprise a tank body 3 with an open top. A square tube bracket 31 is fixedly arranged on the top of the tank body 3. A receiving dish 32 is fixedly arranged inside the tank body 3 at the center of the lower surface of the square tube bracket 31. A drain pipe 33 is fixedly connected to the receiving dish 32 at a position close to the bottom end. An overflow pipe 321 is fixedly connected to the other side of the receiving dish 32. The position where the overflow pipe 321 is connected to the receiving dish 32 is higher than the position where the drain pipe 33 is connected to the receiving dish 32. One end of the drain pipe 33 penetrates the side wall of the tank body 3 and is fixedly installed with a first valve body 34. A water inlet pipe 5 is fixedly arranged on one side of the tank body 3. One end of the water inlet pipe 5 penetrates the side wall of the tank body 3, the receiving dish 32, and the square tube bracket 31 in sequence and is fixedly installed with a rotary spray head 52. The one end of the water inlet pipe 5 is externally connected with a conveying pipe. The conveying pipe can convey clean water into the water inlet pipe 5. The clean water in the water inlet pipe 5 is conveyed into the rotary spray head 52. When the milk bucket body 4 is placed with the opening downward on the center of the upper surface of the square tube bracket 31, the rotary spray head 52 is located at the center inside the milk bucket body 4. At this time, the water inlet pipe 5 conveys clean water into the rotary spray head 52, so that the rotary spray head 52 sprays clean water to the top surface inside the milk bucket body 4. The rotary spray head 52 is a mature product that can be easily purchased on the market. When the water flow is sprayed through the nozzle of the rotary spray head 52, an opposite force is generated. This torque makes the rotary spray head 52 rotate. The rotating rotary spray head 52 can uniformly spray clean water to the top surface and the side wall inside the milk bucket body 4. At the same time, the clean water attached to the top surface inside the milk bucket body 4 will flow downward along the inner side wall of the milk bucket body 4 under the action of gravity, so that the clean water can completely clean the milk stains inside the milk bucket body 4. The square tube bracket 31 has a cross structure. The square tube bracket 31 divides the opening of the tank body 3 into four areas. When the milk bucket body 4 is placed with the opening downward on the center of the upper surface of the square tube bracket 31, the positions close to the edge of the opening of the milk bucket body 4 are located directly above the four areas. The inner diameter of the receiving dish 32 is greater than the inner diameter of the opening of the milk bucket body 4. The receiving dish 32 is located directly below the milk bucket body 4. Therefore, when the clean water mixed with milk stains flows out of the milk bucket body 4 through the opening of the milk bucket body 4, the clean water will flow into the receiving dish 32 through the opening of the tank body 3. At this time, the first valve body 34 is in an open state. The clean water in the receiving dish 32 will be discharged outward through the drain pipe 33, thereby achieving the cleaning of the milk stains inside the milk bucket body 4.

[0032] The milk residue adhered to the inside of the milk bucket body 4 after the milk residue inside the milk bucket body 4 is cleaned, in order to clean the residue inside the milk bucket body 4, a circulating assembly is arranged in the inside of the tank body 3, and a supplement pipe 7 is fixedly connected to the position close to the top end on one side of the tank body 3, the one end of the supplement pipe 7 on the alkali washing tank assembly 1 is externally connected with a conveying pipe for conveying the alkaline solution, the alkaline solution is a sodium hydroxide solution with a good ratio, when the conveying pipe injects the alkaline solution into the inside of the tank body 3 through the supplement pipe 7, the alkaline solution is accumulated in the inside of the tank body 3, a ball valve is installed on the supplement pipe 7, the float ball of the ball valve is arranged in the inside of the tank body 3, when the liquid level of the alkaline solution in the inside of the tank body 3 rises, the float ball is floated on the water surface of the alkaline solution and is upwardly displaced, when the water level of the tank body 3 reaches the specified height, the ball valve is automatically closed to block the supplement pipe 7, at this time the supplement pipe 7 stops injecting the alkaline solution into the inside of the tank body 3, at this time the circulating assembly drives the alkaline solution in the alkali washing tank assembly 1 to circulate, the structure of the circulating assembly is refined below, for reference Figure 3, the circulating assembly comprises a bottom pipe 35 fixedly arranged at the bottom of the tank body 3, the second valve body 36 is fixedly arranged on the bottom pipe 35 in the alkali washing tank assembly 1, the lower end of the bottom pipe 35 is fixedly connected with a cross pipe 37, the cross pipe 37 and the bottom pipe 35 form an inverted T-shaped structure, the third valve body 38 and the fourth valve body 39 are fixedly arranged on the cross pipe 37 in the alkali washing tank assembly 1, the third valve body 38 and the fourth valve body 39 are respectively arranged at the positions on both sides of the bottom pipe 35, the centrifugal pump 8 is fixedly arranged at one end of the cross pipe 37 in the alkali washing tank assembly 1, the centrifugal pump 8 is close to the third valve body 38, the return pipe 81 is fixedly connected with the side wall of the water inlet pipe 5 at the upper end of the return pipe 81, the sixth valve body 82 is fixedly arranged on the return pipe 81 in the alkali washing tank assembly 1, the fifth valve body 51 is fixedly arranged on the water inlet pipe 5, the fifth valve body 51 is arranged at one end of the water inlet pipe 5 away from the connecting position of the return pipe 81 and the water inlet pipe 5, and the fifth valve body 51 is also arranged at one end of the water inlet pipe 5 away from the rotating spray head 52, the worker opens the second valve body 36, the third valve body 38 and the sixth valve body 82, keeps the fourth valve body 39 in a closed state, closes the first valve body 34, and then starts the centrifugal pump 8, so that the centrifugal pump 8 draws the alkaline solution in the tank body 3 through the cross pipe 37 and the bottom pipe 35, the centrifugal pump 8 transports the alkaline solution in the tank body 3 to the inside of the water inlet pipe 5 through the return pipe 81, the water inlet pipe 5 transports the alkaline solution to the rotating spray head 52, and the alkaline solution is uniformly sprayed on the inner wall of the milk bucket body 4 through the rotating spray head 52, the alkaline solution in the milk bucket body 4 flows into the inside of the receiving dish 32, when the first valve body 34 in the alkali washing tank assembly 1 is closed, the alkaline solution in the receiving dish 32 cannot be discharged through the drain pipe 33, and the alkaline solution in the receiving dish 32 will accumulate, when the liquid level of the alkaline solution in the receiving dish 32 is flush with the overflow pipe 321, and the alkaline solution in the milk bucket body 4 continues to flow into the inside of the receiving dish 32, the alkaline solution in the receiving dish 32 flows into the inside of the tank body 3 through the overflow pipe 321, so as to form the circulation flow of the alkaline solution in the inside of the tank body 3, so that the part of the alkaline solution is used for the circulation cleaning of the inner wall of the milk bucket body 4, and the circulation cleaning process lasts for about 1 minute, because the alkaline solution can decompose the oil, milk and other protein dirt accumulated in the milk bucket body 4 during use, so that the alkaline solution can clean the dirt adhered to the inner wall of the milk bucket body 4 in the circulation cleaning process.

[0033] When the circulating flow of the alkaline solution cleans the milk residue adhered to the inner wall of the milk bucket body 4, there will be residual alkaline solution on the inner wall of the milk bucket body 4. Part of the milk bucket body 4 is made of ceramic, and the alkaline solution mainly composed of sodium hydroxide solution can corrode the ceramic. Therefore, if the part of the alkaline solution cannot be quickly cleaned, it will corrode the milk bucket body 4, reducing the service life of the milk bucket body 4. To solve this problem, the worker needs to close the centrifugal pump 8 and the sixth valve body 82, and then open the fifth valve body 51 and the first valve body 34. The external conveying pipe sends clean water to the water inlet pipe 5, and the rotating nozzle 52 sprays clean water to clean the residual alkaline solution on the inner wall of the milk bucket body 4. The flushing time lasts for 10 seconds. Then the worker closes the first valve body 34 to stop the rotating nozzle 52 from spraying water. The worker can then remove the milk bucket body 4 from the square tube support 31, completing the cleaning work of the milk bucket body 4.

[0034] After the dirt inside the milk bucket body 4 is cleaned, there are still a large number of harmful microorganisms inside the milk bucket body 4, and the milk bucket body 4 cannot be used to hold sheep milk again. To solve this problem, the worker will place the cleaned milk bucket body 4 on the top of the sterilization tank assembly 2, which is completely the same structure as the alkali washing tank assembly 1. When the worker places the milk bucket body 4 on the top surface of the center of the square tube support 31 in the sterilization tank assembly 2, and the rotating nozzle 52 in the sterilization tank assembly 2 is inside the milk bucket body 4, the worker closes the first valve body 34 and the second valve body 36 in the sterilization tank assembly 2, so that the water inlet pipe 5 sends clean water to the rotating nozzle 52. The principle is the same as that in the alkali washing tank assembly 1. A part of the clean water will accumulate in the inside of the tank body 3. When the liquid level sensor detects that the clean water in the tank body 3 reaches the predetermined water level and sends an alarm, the worker closes the fifth valve body 51, so that the water inlet pipe 5 stops sending clean water to the rotating nozzle 52. At this time, the liquid level sensor sends an electrical signal to the electric heating pipe 6, so that the electric heating pipe 6 heats the clean water in the tank body 3. The tank body 3 is provided with a temperature sensor electrically connected with the electric heating pipe 6. The temperature sensor monitors the water temperature of the clean water in the tank body 3 in real time, and controls the heating power of the electric heating pipe 6 according to the temperature data, so that the clean water in the tank body 3 is heated to a predetermined temperature and kept at a constant temperature. Then the worker opens the second valve body 36, the third valve body 38 and the sixth valve body 82 in the sterilization tank assembly 2, closes the first valve body 34 in the sterilization tank assembly 2, and starts the centrifugal pump 8. The principle is the same as that in the alkali washing tank assembly 1, so that the hot water circulates between the bottom pipe 35, the horizontal pipe 37, the return pipe 81, the water inlet pipe 5, the rotating nozzle 52, the receiving dish 32, the overflow pipe 321 and the tank body 3. The rotating nozzle 52 uniformly sprays hot water on the inner wall of the milk bucket body 4. The high-temperature hot water has a killing effect on the microorganisms in the milk bucket body 4. In this way, the inside of the milk bucket body 4 is sterilized and disinfected. The sterilization time lasts for 15 seconds. Then the worker closes the sixth valve body 82 in the sterilization tank assembly 2 and the centrifugal pump 8, so that the rotating nozzle 52 stops spraying hot water. The worker takes the milk bucket from the square tube support 31, and the sterilization and disinfection of the milk bucket is completed.

[0035] The end of the horizontal pipe 37 away from the centrifugal pump 8 is connected to the sewer. When the worker needs to drain the liquid in the tank body 3, the worker opens the second valve body 36 and the fourth valve body 39, so that the liquid in the tank body 3 is discharged to the sewer through the bottom pipe 35 and the horizontal pipe 37. In this way, the liquid in the tank body 3 cannot be updated, which avoids the harmful microorganisms from breeding in the liquid in the tank body 3, affecting the sanitary cleaning of the inside of the tank body 3.

[0036] The alkali washing tank assembly 1 and the sterilization tank assembly 2 in the device are completely same in structure, when the alkali washing tank assembly 1 and the sterilization tank assembly 2 are out of order, the same maintenance mode can be used to maintain the alkali washing tank assembly 1 and the sterilization tank assembly 2, the parts on the alkali washing tank assembly 1 and the sterilization tank assembly 2 can be universal, the types of the parts needed to be replaced by the workers for maintaining the alkali washing tank assembly 1 and the sterilization tank assembly 2 are less, thereby the maintenance pressure of the workers on the alkali washing tank assembly 1 and the sterilization tank assembly 2 is reduced.

[0037] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A device with the functions of cleaning and disinfecting a hand milk bucket, comprising a caustic washing tank assembly (1), one side of the caustic washing tank assembly (1) is provided with a sterilization tank assembly (2), characterized in that: The alkali washing tank assembly (1) and the sterilization tank assembly (2) each comprise a tank body (3) with an open top, an electric heating pipe (6) for heating clean water is fixedly installed inside the tank body (3) near the bottom end, a supplementary pipe (7) is fixedly connected to one side of the tank body (3) near the top end, a square pipe support (31) is fixedly arranged on the top of the tank body (3), a receiving dish (32) arranged inside the tank body (3) is fixedly arranged on the center of the lower surface of the square pipe support (31), a drain pipe (33) is fixedly connected to one side of the receiving dish (32) near the bottom end, an overflow pipe (321) is fixedly connected to the other side of the receiving dish (32), the position where the overflow pipe (321) is connected to the receiving dish (32) is higher than the position where the drain pipe (33) is connected to the receiving dish (32), one end of the drain pipe (33) penetrates through the side wall of the tank body (3) and is fixedly installed with a first valve body (34), a water inlet pipe (5) is fixedly arranged on one side of the tank body (3), one end of the water inlet pipe (5) penetrates through the side wall of the tank body (3), the receiving dish (32) and the square pipe support (31) in sequence and is fixedly installed with a rotary spray head (52), the water inlet pipe (5) supplies clean water to the rotary spray head (52), when the milk bucket body (4) is placed on the center of the upper surface of the square pipe support (31) with the opening downward, the rotary spray head (52) is located at the center of the inside of the milk bucket body (4), a circulating assembly is arranged inside the tank body (3), when the first valve body (34) is in a closed state, the circulating assembly drives the liquid in the alkali washing tank assembly (1) or the sterilization tank assembly (2) to circulate and flow, when the first valve body (34) is in an open state, the clean water in the receiving dish (32) is discharged outward through the drain pipe (33).

2. The device with the function of cleaning and disinfecting the hand milk pail according to claim 1, characterized in that: The circulating assembly comprises a bottom pipe (35) fixedly arranged on the bottom of the tank body (3), a second valve body (36) is fixedly installed on the bottom pipe (35), a horizontal pipe (37) is fixedly connected to the lower end of the bottom pipe (35), the horizontal pipe (37) and the bottom pipe (35) form an inverted T-shaped structure, a third valve body (38) and a fourth valve body (39) are fixedly installed on the horizontal pipe (37) on both sides of the bottom pipe (35) respectively.

3. The device with the function of cleaning and disinfecting the hand milk pail according to claim 2, characterized in that: The circulating assembly further comprises a centrifugal pump (8) fixedly installed on one end of the horizontal pipe (37), the centrifugal pump (8) is close to the third valve body (38), a backflow pipe (81) is fixedly connected to one side of the centrifugal pump (8) away from the horizontal pipe (37), the upper end of the backflow pipe (81) is fixedly connected to the side wall of the water inlet pipe (5), a sixth valve body (82) is fixedly installed on the backflow pipe (81).

4. The device with the function of cleaning and disinfecting the hand milk pail according to claim 3, characterized in that: A fifth valve body (51) is fixedly installed on the water inlet pipe (5), the fifth valve body (51) is arranged on one end of the water inlet pipe (5) away from the connection position between the backflow pipe (81) and the water inlet pipe (5), and the fifth valve body (51) is also arranged on one end of the water inlet pipe (5) away from the rotary spray head (52).

5. The device with the function of cleaning and disinfecting the hand milk pail according to claim 1, characterized in that: The square tube support (31) is a cross structure, and the square tube support (31) divides the opening of the tank body (3) into four areas, when the milk bucket body (4) is placed on the center position of the upper surface of the square tube support (31) with the opening downward, the position of the opening of the milk bucket body (4) close to the edge is located directly above the four areas.

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