Low-temperature fresh-keeping barrel for milk transfer

Abstract

The utility model discloses a low-temperature fresh-keeping barrel for milk transfer, which comprises a barrel body and a barrel cap, the barrel body consists of an inner container and a shell, the inner container is arranged in the shell and is detachably connected with the shell, the barrel cap is detachably connected with the inner container, and the barrel cap is detachably connected with the inner container. A first distance is reserved between the outer wall of the inner container and the inner wall of the shell, and an interlayer is formed between the outer wall of the inner container and the inner wall of the shell through the first distance. The structural design of the inner container of the low-temperature fresh-keeping barrel can be applied to various devices at the same time, so that the transfer frequency of milk is reduced, and due to the fact that the milk cannot be exposed in the external environment in the whole transfer process, the risk that the milk is polluted in the milk transfer process can be greatly reduced. The shell serves as a first heat preservation device of the fresh-keeping barrel, and in order to avoid too fast temperature transfer, a first distance is formed between the inner wall of the shell and the outer wall of the inner container, so that an air interlayer is formed, and heat transfer is slowed down.

Description

TECHNICAL FIELD

[0001] The utility model relates to milk product processing technical field more specifically, the utility model relates to a low temperature preservation barrel for milk transfer. BACKGROUND

[0002] In the patent number CN201820652548, a kind of fresh-keeping barrel for storing milk is disclosed, which mainly solves the problem of long-term storage of fresh-keeping barrel by refrigerating machine. However, in actual production, dairy products are usually not stored for a long time, and short-term storage is also stored in cold storage to minimize energy consumption and reduce operating costs. Correspondingly, for large dairy factories, there is usually a complete production line, and dairy products can be continuously supplied along the pipeline. A complete production line requires a huge floor area to build a factory. For small and medium-sized enterprises, it is basically impossible to realize continuous production line construction, and most of them adopt the method of filling dairy products into insulation barrels and then transporting them to various processes. During the transportation process, dairy products are exposed to the external environment several times, which can easily contaminate dairy products. In addition, low-temperature preservation of dairy products is also required during the transportation process to prevent deterioration. If the method mentioned in patent number CN201820652548 is used to maintain low-temperature transportation by setting a refrigerating machine, it is a huge burden for enterprises, and the transportation during production will not be stored for a long time. Therefore, how to maintain the low temperature of dairy products in a short time, delay the rate of heat transfer, and reduce the time of dairy products exposed to the external environment during transportation is the technical problem to be solved by the utility model. SUMMARY

[0003] A series of simplified concepts are introduced in the summary section of the utility model, which will be further described in detail in the specific embodiment section. The summary section of the utility model does not mean to try to limit the key features and necessary technical features of the claimed technical solution, nor does it mean to try to determine the protection scope of the claimed technical solution.

[0004] To at least partially solve the above problems, the utility model provides a low-temperature fresh-keeping barrel for milk transfer, which comprises a barrel body and a barrel cap. The barrel body is composed of an inner container and an outer shell. The inner container is arranged in the outer shell, and the inner container and the outer shell are detachably connected. The barrel cap is detachably connected with the inner container. A first distance is reserved between the outer wall of the inner container and the inner wall of the outer shell, and a partition is formed between the outer wall of the inner container and the inner wall of the outer shell through the first distance.

[0005] Preferably, the inner container is provided with a sealing flange at the opening, the sealing flange is located on the outer side wall of the inner container and extends away from the inner container, the outer shell is a cylindrical structure with an opening at one end, the opening end of the outer shell is provided with a plurality of threaded holes, the opening end of the outer shell abuts the side of the sealing flange away from the opening of the inner container, and the sealing flange is provided with a plurality of screws that penetrate the sealing flange and are threadedly connected with the threaded holes of the opening end of the outer shell.

[0006] Preferably, the sealing flange is provided with a connecting pipe that extends away from the inner container, the connecting pipe communicates with the inside of the inner container through the sealing flange, the outer wall of the connecting pipe is provided with external threads, the bucket cap is provided with a groove with internal threads, and the bucket cap is threadedly connected with the connecting pipe, and the end surface of the bucket cap abuts the end surface of the sealing flange when the bucket cap is connected with the connecting pipe.

[0007] Preferably, the outer side wall of the inner container is provided with a plurality of spherical protrusions that extend from the outer side wall of the inner container to the inner wall of the outer shell, and the inner container and the spherical protrusions are made of the same material.

[0008] Preferably, the outer side wall of the inner container abuts the inner side wall of the outer shell through the spherical protrusions.

[0009] Preferably, the application further comprises a heat preservation shell that is sleeved outside the outer shell, the sealing flange and the bucket cap, and the heat preservation shell is attached with a heat preservation material inside.

[0010] Preferably, the heat preservation shell is composed of an upper shell, a lower shell and an intermediate shell, the inner wall of the lower shell is shaped to match the contour of the outer bottom surface of the outer shell, the inner wall of the upper shell is shaped to match the outer contour of the bucket cap and the sealing flange, and the inner wall of the intermediate shell is shaped to match the outer surface contour of the outer shell.

[0011] Preferably, the upper shell is composed of two symmetrically arranged upper half shells, two first grooves connected with the top of the intermediate shell are symmetrically arranged on the vertical end surface of the upper half shell, a first through hole is arranged on the vertical end surface of the first groove, when the vertical end surfaces of the two upper half shells abut together, the first grooves of the two upper half shells are spliced into a first insertion groove, and the first through holes of the two first grooves spliced into the first insertion groove are located on the same central axis.

[0012] Preferably, the lower shell is composed of two symmetrically arranged lower half shells, and symmetrically arranged second grooves are arranged on the vertical end faces of the lower half shells and connected with the bottom of the middle shell, and second through holes are arranged on the vertical end faces of the second grooves, and when the vertical end faces of the two lower half shells abut together, the second grooves of the two lower half shells are spliced into a second slot, and the second through holes of the two second grooves spliced into the second slot are located on the same central axis.

[0013] Preferably, the middle shell is composed of two symmetrically arranged middle half shells, and symmetrically arranged first protrusions are arranged on the top end faces of the middle half shells and matched with the first grooves, and third through holes are arranged on the vertical end faces of the first protrusions, and when the vertical end faces of the two middle half shells abut together, the two first protrusions are spliced into a first clamping table, and the third through holes of the two first protrusions spliced into the first clamping table are located on the same central axis, and the middle shell is inserted with the first slot through the first clamping table, and after insertion, the first through hole and the third through hole are located on the same central axis to form a first connecting hole, and a screw and a nut are arranged in the first connecting hole.

[0014] Symmetrically arranged second protrusions are arranged on the bottom end faces of the middle half shells and matched with the second grooves, and fourth through holes are arranged on the vertical end faces of the second protrusions, and when the vertical end faces of the two middle half shells abut together, the two second protrusions are spliced into a second clamping table, and the fourth through holes of the two second protrusions spliced into the second clamping table are located on the same central axis, and the middle shell is inserted with the second slot through the second clamping table, and after insertion, the second through hole and the fourth through hole are located on the same central axis to form a second connecting hole, and a screw and a nut are arranged in the second connecting hole.

[0015] Compared with the prior art, the utility model at least has the following beneficial effects:

[0016] The structure design of the low-temperature preservation barrel inner container can be applied to various equipment at the same time, for example, can be applied to standardization, homogenization, pasteurization, filling and other processes, and the same is the transportation of milk in the homogenization and pasteurization processes, the inner container is directly installed in the homogenization equipment, the homogenized milk directly enters the inner container, then the inner container is covered with a barrel cap and is installed on the outer shell for heat preservation and transportation, finally the inner container is separated from the outer shell and is directly installed on the pasteurization equipment, thereby reducing the number of milk transfer, because the milk is not exposed to the external environment during the whole transportation process, so the risk of pollution during the milk transportation process can be greatly reduced. The outer shell exists as the first heat preservation appliance of the preservation barrel, in order to avoid too fast temperature transfer, the first distance is formed between the inner wall of the outer shell and the outer wall of the inner container, thereby slowing down heat transfer.

[0017] The utility model discloses a low temperature fresh -keeping barrel for milk transfer, the other advantages, target and feature of the utility model will be partly embodied through the following explanation, and part will still be understood by the person skilled in the art through the research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model. In the drawings:

[0019] Figure 1 It is the schematic diagram of low temperature fresh -keeping barrel for milk transfer of the utility model.

[0020] Figure 2 It is the explosion map of Figure 1 .

[0021] Figure 3 It is the sectional view of low temperature fresh -keeping barrel for milk transfer of the utility model.

[0022] Figure 4 It is the structural schematic diagram of heat preservation shell.

[0023] Figure 5 It is the explosion map of Figure 4 .

[0024] Figure 6 It is the sectional view when installing heat preservation shell of low temperature fresh -keeping barrel for milk transfer of the utility model.

[0025] In the drawing: 1 bucket cap, 2 inner bag, 3 shell, 4 sealing flange, 5 connecting pipe, 6 spherical convex, 7 upper shell, 7a, 7b upper half shell, 71 first groove, 8 lower shell, 8a, 8b lower half shell, 81 second groove, 9 middle shell, 9a, 9b middle half shell, 91 first convex, 92 second convex. DETAILED DESCRIPTION

[0026] The utility model will be further explained in detail in the following in combination with the drawings and embodiments, so that the person skilled in the art can implement according to the specification text.

[0027] It should be understood that the terms such as "have", "contain" and "include" used in this paper do not exclude the presence or addition of one or more other elements or combinations thereof.

[0028] As Figures 1-6The utility model provides a low temperature preservation bucket for milk transfer, including bucket body and bucket cap 1, the bucket body is by inner bag 2 and shell 3 composition, the inner bag 2 is arranged in the shell 3, and the inner bag 2 with shell 3 detachable connection, the bucket cap 1 with inner bag 2 detachable connection, the outer wall of inner bag 2 and the inner wall of shell 3 between reservation first distance, and the outer wall of inner bag 2 and the inner wall of shell 3 between through first distance form the interlayer.

[0029] The working principle and beneficial effects of the above technical solution are as follows: Because the low temperature preservation bucket is mainly applied to the transfer of milk, in order to avoid the repeated transfer of milk in different containers, the inner bag 2 and the shell 3 are designed to be detachable, so that the inner bag 2 is only used as a container for storing milk. The shape and structure of the inner bag 2 can be suitable for various processing equipment. For example, in the production process of frozen milk, the process flow is as follows:

[0030] S1: raw milk enters the factory;

[0031] S2: raw material inspection;

[0032] S3: filtration;

[0033] S4: refrigeration;

[0034] S5: standardization;

[0035] S6: homogenization;

[0036] S7: pasteurization;

[0037] S8: cooling;

[0038] S9: filling;

[0039] S10: freezing;

[0040] S11: factory inspection;

[0041] S12: factory delivery.

[0042] In the above steps, milk transfer is required between each step. Some use direct pipeline transportation, and some need to use preservation buckets for transfer. In order to avoid the repeated transfer of milk in different containers, for example, in the homogenization and pasteurization processes, the traditional milk tank is used for transfer, which involves transferring the homogenized milk to the milk tank first, then transporting the milk tank to the pasteurization equipment, and then transferring the milk in the milk tank to the pasteurization equipment. During this period, the homogenized milk first enters the milk tank and then enters the pasteurization equipment from the milk tank.

[0043] The structure design of the low-temperature preservation barrel inner container 2 can be applied to various devices at the same time, for example, it can be applied to standardization, homogenization, pasteurization, filling and other processes at the same time. Taking the transportation of milk in the homogenization and pasteurization processes as an example, the inner container 2 is directly installed in the homogenization device, the homogenized milk directly enters the inner container 2, then the inner container 2 is covered with the barrel cap 1, and is installed on the outer shell 3 for heat preservation and transportation, finally the inner container 2 is separated from the outer shell 3, and the inner container 2 is directly installed in the pasteurization device, thereby reducing the number of milk transfer. Because the milk is not exposed to the external environment during the whole transportation process, the risk of milk contamination during transportation can be greatly reduced.

[0044] The outer shell 3 exists as the first heat preservation device of the preservation barrel. In order to avoid too fast temperature transfer, the inner wall of the outer shell 3 and the outer wall of the inner container 2 have a first distance, thereby forming an air layer to slow down heat transfer.

[0045] Further, the air layer can be vacuumized after the inner container 2 is installed in the outer shell 3, forming a vacuum layer to further slow down the rate of heat transfer. Generally, one outer shell 3 corresponds to one inner container 2, but it should be noted that one outer shell 3 can also install multiple inner containers 2, thereby improving the transportation efficiency during transportation.

[0046] Further, we provide a specific implementation, the opening of the inner container 2 is provided with a sealing flange 4, the sealing flange 4 is located on the outer side wall of the inner container 2 and extends away from the inner container 2, that is, the outer diameter of the sealing flange 4 is greater than the outer diameter of the inner container 2, as shown in Figure 2 The outer shell 3 is a cylindrical structure with an opening at one end, the opening end of the outer shell 3 is provided with a plurality of threaded holes, the opening end of the outer shell 3 abuts the side of the sealing flange 4 away from the opening of the inner container 2, the sealing flange 4 is provided with a plurality of screws, the screws penetrate the sealing flange 4 and are threadedly connected with the threaded holes of the opening end of the outer shell 3. Thus, the outer shell 3 can be sleeved on the outer side of the inner container 2.

[0047] A connecting pipe 5 is arranged on the sealing flange 4, which extends away from the inner container 2, and communicates with the inside of the inner container 2 through the sealing flange 4. The outer wall of the connecting pipe 5 is provided with external threads. The barrel cap 1 is provided with a groove with internal threads, which is adapted to the shape of the connecting pipe 5. When the filling is completed, the barrel cap 1 is directly screwed on the connecting pipe 5. When the barrel cap 1 is connected with the connecting pipe 5, the lower end surface of the barrel cap 1 abuts against the upper end surface of the sealing flange 4, and at the same time, the lower end surface of the barrel cap 1 can limit the screws on the sealing flange 4 for connecting with the outer shell 3, so as to avoid the screws from coming out and causing the outer shell 3 to separate from the inner container 2. A plurality of spherical protrusions 6 are arranged on the outer side wall of the inner container 2, which extend from the outer side wall of the inner container 2 to the inner wall of the outer shell 3. The end surface of the spherical protrusion 6 has a second distance from the inner wall of the outer shell 3, so as to avoid the spherical protrusion 6 from contacting the outer shell 3, and further avoid the outer shell 3 from being connected with the inner container 2 through the spherical protrusion 6, which affects the heat preservation effect. The material of the inner container 2 and the spherical protrusion 6 is the same, and the structure of the spherical protrusion 6 can protect the inner container 2 from being damaged by knocking during the transfer process.

[0048] Further, in order to increase the transportation amount of the dairy product, if the end surface of the spherical protrusion 6 still has the second distance from the outer shell 3, the force acting on the connection between the inner container 2 and the sealing flange 4 is huge, and the welding may be easily opened. Therefore, in the embodiment, the second distance is cancelled, the outer side wall of the inner container 2 abuts against the inner side wall of the outer shell 3 through the spherical protrusion 6, so that the inner container 2 can bear a large amount of dairy products. In order to avoid the heat transfer rate from being accelerated due to the contact, the interlayer needs to be a vacuum interlayer.

[0049] In the foregoing embodiment, it is mentioned that in order to increase the carrying capacity of the low-temperature preservation barrel, the inner container 2 needs to be supported by the spherical protrusion 6, but this will cause the inner container 2 to contact the outer shell 3, and further increase the heat transfer rate. In order to reduce the temperature loss speed, the low-temperature preservation barrel is further optimized, which further comprises a heat preservation shell, the heat preservation shell is arranged outside the outer shell 3, the sealing flange 4 and the barrel cap 1, and a heat preservation material is attached in the heat preservation shell. The heat preservation shell is arranged to assist in heat preservation and delay the temperature loss speed.

[0050] The heat preservation shell is composed of an upper shell 7, a lower shell 8 and an intermediate shell 9. The inner wall of the lower shell 8 is adapted to the contour of the outer bottom surface of the outer shell 3, for example Figure 6As shown, the bottom of the outer shell 3 is arc-shaped, so the inner wall of the lower shell 8 is also arc-shaped, the inner wall of the upper shell 7 is shaped to match the outer contour of the barrel cap 1 and the sealing flange 4, and the inner wall of the middle shell 9 is shaped to match the outer surface contour of the outer shell 3, thereby ensuring that the barrel body and the barrel cap 2 can be fully wrapped.

[0051] The top of the upper shell 7 and the bottom of the lower shell 8 are provided with circular openings, which facilitate the separation of the upper shell 7, the lower shell 8, and the barrel body and the barrel cap 2.

[0052] Further, in order to facilitate the installation of the heat preservation shell, the upper shell 7 is composed of two symmetrically arranged upper half shells 7a, 7b, and two first slots 71 that are symmetrically arranged on the vertical end faces of the upper half shells 7a, 7b are connected to the top of the middle shell 9, and the first through holes on the vertical end faces of the first slots 71 are provided with first through holes, as shown. Figure 5

[0053] When the vertical end faces of the two upper half shells 7a, 7b abut together, the first slots 71 of the two upper half shells 7a, 7b are spliced into a first insertion slot, and the first through holes of the two first slots 71 that are spliced into the first insertion slot are located on the same central axis.

[0054] The lower shell 8 is composed of two symmetrically arranged lower half shells 8a, 8b, and two second slots 81 that are symmetrically arranged on the vertical end faces of the lower half shells 8a, 8b are connected to the bottom of the middle shell 9, and the second through holes on the vertical end faces of the second slots 81 are provided with second through holes, as shown. Figure 5

[0055] When the vertical end faces of the two lower half shells 8a, 8b abut together, the second slots 81 of the two lower half shells 8a, 8b are spliced into a second insertion slot, and the second through holes of the two second slots 81 that are spliced into the second insertion slot are located on the same central axis.

[0056] The middle shell 9 is composed of two symmetrically arranged middle half shells 9a, 9b, and two first protrusions 91 that are symmetrically arranged on the top end faces of the middle half shells 9a, 9b are adapted to the first slots 71, and the third through holes on the vertical end faces of the first protrusions 91 are provided with third through holes, when the vertical end faces of the two middle half shells 9a, 9b abut together, the two first protrusions 91 are spliced into a first clamping table, and the third through holes of the two first protrusions 91 that are spliced into the first clamping table are located on the same central axis, the middle shell 9 is inserted into the first insertion slot through the first clamping table, after insertion, the first through holes and the third through holes are located on the same central axis, forming a first connecting hole, and the first connecting hole is provided with a screw and a nut;

[0057] ​​The bottom end surface of the intermediate half shell 9a, 9b is symmetrically provided with two second protrusions 92 matched with the second slot 81, and the vertical end surface of the second protrusion 92 is provided with a fourth through hole, when the vertical end surfaces of the two intermediate half shells 9a, 9b abut together, the two second protrusions 92 are spliced into a second clamping table, and the fourth through holes of the two second protrusions 92 spliced into the second clamping table are located on the same central axis, the intermediate shell 9 is inserted with the second clamping table and the second slot, and after insertion, the second through hole and the fourth through hole are located on the same central axis to form a second connecting hole, and the second connecting hole is provided with a screw and a nut.

[0058] In the embodiment, the half shell splicing structure design is adopted, so that the upper shell 7 and the lower shell 8 can be spliced in the horizontal direction, especially for the lower shell 8, the barrel body does not need to be placed in the lower shell 8 by hoisting equipment or manually, so that the splicing of the heat preservation shell is more convenient, and the structure design of the upper shell 7, the middle shell 9 and the lower shell 8 also enables the middle shell 9 to be replaced according to the barrel body, and the upper shell 7 and the lower shell 8 are applied to the barrel cap and the barrel body bottom, and the barrel cap and the barrel body bottom are usually of a unified type, so that the upper shell 7 and the lower shell 8 can be used for multiple heat preservation barrels.

[0059] In the description of the utility model, it is understood that the directions or position relations indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0060] In the utility model, unless otherwise clearly defined and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or can be detachable connection, or can be integrated; can be mechanical connection, or can be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the communication or interaction relationship between two elements, unless otherwise clearly defined. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0061] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.

Claims

1. A low-temperature preservation bucket for milk transfer, comprising a bucket body and a bucket cap (1), characterized in that, The barrel body is composed of an inner container (2) and an outer shell (3), the inner container (2) is arranged in the outer shell (3), and the inner container (2) is detachably connected with the outer shell (3), the barrel cap (1) is detachably connected with the inner container (2), a first distance is reserved between the outer wall of the inner container (2) and the inner wall of the outer shell (3), and a separation layer is formed between the outer wall of the inner container (2) and the inner wall of the outer shell (3) through the first distance.

2. The low-temperature preservation barrel for milk transfer according to claim 1, characterized by A sealing flange (4) is arranged at the opening of the inner container (2), the sealing flange (4) is located on the outer side wall of the inner container (2) and extends away from the inner container (2), the outer shell (3) has a cylindrical structure with an opening at one end, a plurality of threaded holes are arranged at the opening end of the outer shell (3), the opening end of the outer shell (3) abuts against one side of the sealing flange (4) away from the opening of the inner container (2), a plurality of screws are arranged on the sealing flange (4), the screws penetrate the sealing flange (4) and are threadedly connected with the threaded holes at the opening end of the outer shell (3).

3. The low-temperature preservation barrel for milk transfer according to claim 2, characterized by A connecting pipe (5) is arranged on the sealing flange (4), the connecting pipe (5) extends away from the inner container (2) from the sealing flange (4), the connecting pipe (5) is in communication with the inside of the inner container (2) through the sealing flange (4), the outer wall of the connecting pipe (5) is provided with external threads, a groove with internal threads is arranged on the barrel cap (1), the barrel cap (1) is threadedly connected with the connecting pipe (5), and the end face of the barrel cap (1) abuts against the end face of the sealing flange (4) after the barrel cap (1) is connected with the connecting pipe (5).

4. The low-temperature preservation barrel for milk transfer according to claim 2, characterized by A plurality of spherical protrusions (6) are arranged on the outer side wall of the inner container (2), the spherical protrusions (6) extend from the outer side wall of the inner container (2) to the inner wall of the outer shell (3), and the inner container (2) and the spherical protrusions (6) are made of the same material.

5. The low-temperature preservation barrel for milk transfer according to claim 4, characterized by The outer side wall of the inner container (2) abuts against the inner side wall of the outer shell (3) through the spherical protrusions (6).

6. The low-temperature preservation barrel for milk transfer according to claim 2, characterized by Further comprising a heat preservation shell, the heat preservation shell is sleeved outside the outer shell (3), the sealing flange (4) and the barrel cap (1), and a heat preservation material is attached in the heat preservation shell.

7. The low-temperature preservation barrel for milk transfer according to claim 6, characterized by The heat preservation shell is composed of an upper shell (7), a lower shell (8) and an intermediate shell (9), the inner wall of the lower shell (8) is adapted to the contour of the outer bottom surface of the outer shell (3), the inner wall of the upper shell (7) is adapted to the outer contour of the barrel cap (1) and the sealing flange (4), and the inner wall of the intermediate shell (9) is adapted to the outer surface contour of the outer shell (3).

8. The low-temperature preservation barrel for milk transfer according to claim 7, characterized by The upper shell (7) is composed of two symmetrically arranged upper half shells (7a, 7b), two first grooves (71) connected with the top of the intermediate shell (9) are symmetrically arranged on the end face of the upper half shell (7a, 7b) in the vertical direction, a first through hole is arranged on the end face of the first groove (71) in the vertical direction, when the end faces of the two upper half shells (7a, 7b) in the vertical direction abut against each other, the first grooves (71) of the two upper half shells (7a, 7b) are spliced into a first insertion groove, and the first through holes of the two first grooves (71) spliced into the first insertion groove are located on the same central axis.

9. The low-temperature preservation barrel for milk transfer according to claim 8, characterized by The lower shell (8) is composed of two symmetrically arranged lower half shells (8a, 8b), and symmetrically arranged second grooves (81) connected with the bottom of the middle shell (9) are arranged on the vertical end faces of the lower half shells (8a, 8b), and second through holes are arranged on the vertical end faces of the second grooves (81), when the vertical end faces of the two lower half shells (8a, 8b) abut together, the second grooves (81) of the two lower half shells (8a, 8b) are spliced into a second slot, and the second through holes of the two second grooves (81) spliced into the second slot are located on the same center axis.

10. The low-temperature preservation barrel for milk transfer according to claim 9, characterized by The middle shell (9) is composed of two symmetrically arranged middle half shells (9a, 9b), and two first protrusions (91) adapted to the first grooves (71) are symmetrically arranged on the top end faces of the middle half shells (9a, 9b), and third through holes are arranged on the vertical end faces of the first protrusions (91), when the vertical end faces of the two middle half shells (9a, 9b) abut together, the two first protrusions (91) are spliced into a first clamping table, and the third through holes of the two first protrusions (91) spliced into the first clamping table are located on the same center axis, the middle shell (9) is inserted with the first slot through the first clamping table, after insertion, the first through hole and the third through hole are located on the same center axis, forming a first connecting hole, and a screw and a nut are arranged in the first connecting hole; The bottom end faces of the middle half shells (9a, 9b) are symmetrically provided with two second protrusions (92) adapted to the second grooves (81), and fourth through holes are arranged on the vertical end faces of the second protrusions (92), when the vertical end faces of the two middle half shells (9a, 9b) abut together, the two second protrusions (92) are spliced into a second clamping table, and the fourth through holes of the two second protrusions (92) spliced into the second clamping table are located on the same center axis, the middle shell (9) is inserted with the second slot through the second clamping table, after insertion, the second through hole and the fourth through hole are located on the same center axis, forming a second connecting hole, and a screw and a nut are arranged in the second connecting hole.

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