Freezing type barrel body cleaning process

Abstract

The freezing type barrel body cleaning process comprises the following steps that S1, it is ensured that an end cover of a barrel opening of a barrel body is in a removed state; s2, the barrel body is immersed in liquid nitrogen in the mode that a barrel opening faces upwards, and it is ensured that the height of the liquid nitrogen does not exceed the height of the barrel opening of the barrel body; S3, after impurities in the barrel body are frozen, the barrel body is taken out of the liquid nitrogen, the barrel body is turned over to enable the barrel opening to face downwards, then the barrel body is thrown downwards, and the frozen impurities in the barrel body are thrown to fall off relative to the barrel body; and S4, the barrel body is lifted up, the inner wall of the barrel body is cleaned, and residual impurities on the inner wall of the barrel body are removed. According to the scheme, the barrel body is quickly frozen through the liquid nitrogen, so that impurities on the inner wall of the barrel body are changed from a liquid state to a solid state, and then the solid impurities on the inner wall of the barrel body are greatly impacted to fall off relative to the inner wall of the barrel body in a throwing mode; therefore, impurities on the inner wall of the barrel body are effectively removed, and meanwhile the efficiency is higher compared with a conventional clean water washing cleaning mode.

Description

Technical Field

[0001] The present invention relates to the technical field of barrel cleaning technology, and in particular to a refrigeration barrel cleaning process. Background Art

[0002] For sustainable development, oil and chemical drums are often recycled after their raw materials are used up. However, before recycling, a certain amount of raw material impurities often remain on the inner wall of the drum. If these raw material impurities are recycled with the drum, it will obviously cause pollution.

[0003] In order to solve the above problems, the barrel body needs to be cleaned before recycling. The conventional cleaning method is to rinse with clean water. However, due to the large area of the inner wall of the barrel body, the clean water rinse often requires manual assistance, which is not only inefficient, but also considering that some raw materials are difficult to dissolve in water, they will still remain on the inner wall of the barrel body, and the cleaning effect cannot be guaranteed. Therefore, a new cleaning method for the barrel body is urgently needed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that conventional cleaning methods are not only inefficient but also cannot guarantee cleaning effects.

[0005] To solve the above problems, the present invention provides a refrigeration barrel cleaning process, comprising the following steps: S1. Ensure that the end cap of the barrel mouth is removed; S2. Immerse the barrel with the barrel opening facing upward into the liquid nitrogen, ensuring that the liquid nitrogen level does not exceed the barrel opening height. S3. After the impurities in the barrel are frozen, remove the barrel from the liquid nitrogen, flip the barrel so that the barrel mouth is downward, and then drop the barrel downward, so that the frozen impurities in the barrel are dropped relative to the barrel; S4. Lift the barrel and clean the inner wall of the barrel to remove any impurities remaining on the inner wall of the barrel.

[0006] Compared with the prior art, the above scheme uses liquid nitrogen to quickly freeze the barrel body, so that the impurities on the inner wall of the barrel body are transformed from liquid to solidified state, and then the solidified impurities can be quickly and completely separated from the barrel body by pounding. Compared with the conventional cleaning method of flushing with clean water, the efficiency is high and the impurity removal effect is better. After the barrel body is pounded, the inner wall of the barrel body is cleaned in step S4 to remove the impurities remaining on the inner wall of the barrel body, ensuring a more thorough removal effect of the impurities in the barrel body. At the same time, the above scheme uses pounding to achieve the separation of impurities from the inner wall of the barrel body. Compared with conventional impact, it has at least the following advantages: 1. After being frozen, the impurities in the barrel body are easily formed into a state of being solidified as a whole. Therefore, by pounding the entire barrel body, it is helpful to make the solidified impurities on the inner wall of the barrel body fall off as a whole, that is, the impurities are separated from the barrel body more thoroughly; 2. The impurities in the barrel have inertia. When the barrel is dropped, the impurities will continue to separate from the inner wall of the barrel due to inertia, achieving a better separation effect of the impurities relative to the inner wall of the barrel; 3. Compared with the conventional method of knocking on the barrel, the entire barrel will be impacted when the barrel is dropped, that is, the impact on the barrel will be more comprehensive and more intense, which will help the impurities to separate from the inner wall of the barrel; 4. The dropping method relies on the gravity of the barrel itself, saving energy.

[0007] In an improved solution, before step S2, the barrel body is pre-cooled so that the temperature of the barrel body is maintained at -40 to 0 degrees Celsius, and then step S2 is entered. Therefore, the pre-cooling of the barrel body allows the barrel body to be cooled faster after being immersed in liquid nitrogen in step S2, thereby improving efficiency and reducing the cooling loss of liquid nitrogen.

[0008] In an improved solution, in step S2, the barrel is immersed in liquid nitrogen for 30 to 120 seconds, thereby ensuring that most impurities can be converted from liquid to solid.

[0009] In an improved solution, in step S3, the time interval between taking the barrel out of the liquid nitrogen and dropping the barrel downward is no more than 60 seconds, thereby avoiding the problem that solid impurities turn back into liquid over a long period of time, resulting in the impurities being unable to fall off when the barrel is dropped.

[0010] In an improved solution, in step S3, before the barrel body is dropped downward, the barrel body is first vibrated laterally by a vibrator, so that the inner wall of the barrel body can be separated from the impurities by vibration before the barrel body is dropped, and then when the barrel body is subsequently dropped, the impurities fall off the inner wall of the barrel body more thoroughly.

[0011] In an improved solution, in step S3, an elastic buffer is provided at the point where the barrel falls downward, and the impact of the barrel is cushioned by the elastic buffer, thereby preventing the barrel from being damaged by a hard collision with the bottom plate.

[0012] In an improved solution, in step S4, the specific method of cleaning the inner wall of the barrel is to sweep the inner wall of the barrel with a brush to achieve cleaning. The brush can effectively remove impurities remaining on the inner wall of the barrel and has good reliability.

[0013] In an improved solution, in step S4, the specific method of cleaning the inner wall of the barrel is to spray air toward the inner wall of the barrel, and the jet direction is downward, so that the impurities remaining on the inner wall of the barrel are effectively blown off by the jet, and the operation is simple.

[0014] In an improved solution, in step S4, the specific method of cleaning the inner wall of the barrel is to use a suction machine to suck the inner wall of the barrel, so that impurities are sucked into the suction machine, and the impurities remaining on the inner wall of the barrel are sucked out by the suction machine. The operation is simple and can avoid secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a flow chart of a refrigerated barrel cleaning process; Figure 2 It is a schematic diagram of the main view of a refrigerated barrel cleaning device; Figure 3 It is an overall schematic diagram of a refrigerated barrel cleaning device; Figure 4 It is a top view schematic diagram of a refrigerated barrel cleaning device; Figure 5 For the Figure 3 Schematic cross-sectional view along the AA section line.

[0016] Description of reference numerals: 1. Feeding station; 2. Freezing station; 21. Freezing cylinder; 22. Check cylinder; 23. First limit frame; 3. Striking station; 31. Receiving cylinder; 32. Bottom plate; 33. Second limit frame; 34. Elastic buffer; 4. Cleaning station; 41. Collection basin; 42. Rotating shaft; 43. Rotating motor; 44. Brush; 5. First three-axis translation platform; 51. First gripper; 6. Second three-axis translation platform; 61. Second gripper; 62. Flipping motor; 63. Vibrator. DETAILED DESCRIPTION

[0017] It should be understood by those skilled in the art that the following embodiments are merely intended to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific applications.

[0018] In the following descriptions of the embodiments, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0019] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0020] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1: Please refer to Figure 1 , an embodiment of the present invention provides a refrigeration barrel cleaning process, comprising the following steps: S1. Ensure that the end cap of the barrel mouth is removed; S2. Immerse the barrel with the barrel opening facing upward into the liquid nitrogen, ensuring that the liquid nitrogen level does not exceed the barrel opening height. S3. After the impurities in the barrel are frozen, remove the barrel from the liquid nitrogen, flip the barrel so that the barrel mouth is downward, and then drop the barrel downward, so that the frozen impurities in the barrel are dropped relative to the barrel; S4. Lift the barrel and clean the inner wall of the barrel to remove any impurities remaining on the inner wall of the barrel.

[0022] Compared with the prior art, the above scheme uses liquid nitrogen to quickly freeze the barrel body, so that the impurities on the inner wall of the barrel body are transformed from liquid to solidified state, and then the solidified impurities can be quickly and completely separated from the barrel body by pounding. Compared with the conventional cleaning method of flushing with clean water, the efficiency is high and the impurity removal effect is better. After the barrel body is pounded, the inner wall of the barrel body is cleaned in step S4 to remove the impurities remaining on the inner wall of the barrel body, ensuring a more thorough removal effect of the impurities in the barrel body. At the same time, the above scheme uses pounding to achieve the separation of impurities from the inner wall of the barrel body. Compared with conventional impact, it has at least the following advantages: 1. After being frozen, the impurities in the barrel body are easily formed into a state of being solidified as a whole. Therefore, by pounding the entire barrel body, it is helpful to make the solidified impurities on the inner wall of the barrel body fall off as a whole, that is, the impurities are separated from the barrel body more thoroughly; 2. The impurities in the barrel have inertia. When the barrel is dropped, the impurities will continue to separate from the inner wall of the barrel due to inertia, achieving a better separation effect of the impurities relative to the inner wall of the barrel; 3. Compared with the conventional method of knocking on the barrel, the entire barrel will be impacted when the barrel is dropped, that is, the impact on the barrel will be more comprehensive and more intense, which will help the impurities to separate from the inner wall of the barrel; 4. The dropping method relies on the gravity of the barrel itself, saving energy.

[0023] As an optimization of the above embodiment, before step S2, the barrel body is pre-cooled so that the temperature of the barrel body is maintained at -40 to 0 degrees Celsius, and then step S2 is entered. Therefore, by pre-cooling the barrel body, the barrel body can be cooled faster after being immersed in liquid nitrogen in step S2, thereby improving efficiency and reducing the cooling capacity loss of liquid nitrogen. Regarding the pre-cooling method, the barrel body can be pre-cooled by setting up a closed pre-cooling chamber and placing it in the pre-cooling chamber for a period of time.

[0024] In step S2, the barrel is immersed in liquid nitrogen for 30 to 120 seconds, thereby ensuring that most impurities can be converted from liquid to solid.

[0025] In step S3, the time interval between taking the barrel out of the liquid nitrogen and dropping the barrel downward is no more than 60 seconds, thereby avoiding the problem that solid impurities turn back into liquid over a long period of time, resulting in the impurities being unable to fall off when the barrel is dropped.

[0026] As an optimization of the above embodiment, in step S3, before the barrel body is dropped downward, the barrel body is first vibrated laterally by a vibrator, so that the inner wall of the barrel body can be separated from the impurities by vibration before the barrel body is dropped, and then when the barrel body is subsequently dropped, the impurities fall off the inner wall of the barrel body more thoroughly.

[0027] As an optimization of the above embodiment, in step S3, an elastic buffer is provided at the landing point of the barrel body when it falls downward, so as to cushion the impact of the barrel body by the elastic buffer, thereby preventing the barrel body from being damaged by a hard collision with the bottom plate.

[0028] In one embodiment, the specific method of cleaning the inner wall of the barrel in step S4 is to sweep the inner wall of the barrel with a brush to achieve cleaning. The brush can effectively remove impurities remaining on the inner wall of the barrel and has good reliability.

[0029] In another embodiment, the specific method of cleaning the inner wall of the barrel in step S4 is to spray air toward the inner wall of the barrel, and the jet direction is downward, so that impurities remaining on the inner wall of the barrel are effectively blown off by the jet, and the operation is simple.

[0030] In another embodiment, the specific method of cleaning the inner wall of the barrel in step S4 is to use a suction machine to suck the inner wall of the barrel, so that impurities are sucked into the suction machine, and the impurities remaining on the inner wall of the barrel are sucked out by the suction machine. The operation is simple and can avoid secondary pollution.

[0031] Example 2: Please refer to Figure 2-Figure 5 , an embodiment of the present invention provides a refrigerated barrel cleaning device, comprising: Feeding station 1, used to place the barrel; The freezing station 2 is provided with a freezing cylinder 21. The upper side of the freezing cylinder 21 is provided with an opening for the barrel to be placed in. The freezing cylinder 21 is provided with liquid nitrogen; The striking station 3 is provided with a receiving cylinder 31. The upper side of the receiving cylinder 31 is provided with an opening for the barrel to fall into, and the lower side of the receiving cylinder 31 is provided with a bottom plate 32 for receiving the barrel; Cleaning station 4 is provided with a cleaning component for extending into the barrel and cleaning the inner wall of the barrel; The transfer module is used to grab the barrel body of the feeding station 1 and move it to the freezing station 2, the beating station 3 and the cleaning station 4 in sequence. The transfer module includes a flipping mechanism, which is used to flip the barrel body up and down after being processed by the freezing station 2.

[0032] It should be understood that the transfer module can be a six-axis robotic arm with a high degree of freedom, so as to realize the grasping, transportation and flipping of the barrel body; and in this embodiment, the transfer module includes a conveying component and a clamp, and the conveying component acts on the clamp to drive the clamp to move horizontally or vertically. The feeding station 1, the freezing station 2, the striking station 3 and the cleaning station 4 are all located below the horizontal movement path of the clamp, so that the barrel body can be grasped and transported by cooperating with the clamp through the conveying component.

[0033] Furthermore, the clamp includes a first clamp 51 and a second clamp 61, and the transport assembly includes a first three-axis translation platform 5 and a second three-axis translation platform 6. The first clamp 51 is driven by the first three-axis translation platform 5 to realize the movement between the feeding station 1 and the freezing station 2. The first clamp 51 is used to clamp the barrel mouth end of the barrel body and ensure that the barrel mouth end is upward. The second clamp 61 is driven by the second three-axis translation platform 6 to realize the movement between the striking station 3 and the cleaning station 4. The second clamp 61 is used to clamp the barrel body after being processed in the freezing station 2. At the bottom end of the barrel, the flipping mechanism is a flipping motor 62 arranged on the second three-axis translation platform 6. The flipping motor 62 acts on the second clamp 61 and is used to drive the second clamp 61 to flip up and down, so that the barrel body is transported from the feeding station 1 to the freezing station 2 through the first three-axis translation platform 5 in cooperation with the first clamp 51, and then the barrel body is flipped up and down after being processed in the freezing station 2 and then transported to the striking station 3 and the cleaning station 4 through the second three-axis translation platform 6 in cooperation with the flipping motor 62 and the second clamp 61, which is highly efficient.

[0034] The first three-axis translation stage 5 and the second three-axis translation stage 6 are both existing technologies. Specifically, the first three-axis translation stage 5 includes a first X guide rail arranged along the front-to-back direction, a first Y guide rail arranged along the left-to-right direction, and a first Z guide rail arranged along the up-to-down direction. The first Y guide rail is connected to the first X guide rail and is driven by the first X guide rail to move in the front-to-back direction. The first Z guide rail is connected to the first Y guide rail and is driven by the first Y guide rail to move in the left-to-right direction. The first clamp 51 is connected to the first Z guide rail and is driven by the first Z guide rail to move in the up-to-down direction. Similarly, the second The three-axis translation stage 6 includes a second X guide rail arranged along the front-to-back direction, a second Y guide rail arranged along the left-to-right direction, and a second Z guide rail arranged along the up-to-down direction. The second Y guide rail is connected to the second X guide rail and is driven by the second X guide rail to achieve front-to-back movement. The second Z guide rail is connected to the second Y guide rail and is driven by the second Y guide rail to achieve left-to-right movement. The flip motor 62 is connected to the second Z guide rail and is driven by the second Z guide rail to achieve up-to-down movement. The axis of the flip motor 62 is along the horizontal direction. The second clamp 61 is connected to the output end of the flip motor 62.

[0035] When the barrel body needs to be cleaned, the above scheme uses the transfer module to grab the barrel body to be cleaned from the feeding station 1 and transfer it to the freezing station 2 with the barrel mouth facing upward. The barrel body is rapidly cooled down under the action of liquid nitrogen in the freezing cylinder 21, so that the impurities on the inner wall of the barrel are frozen and formed into a solidified state. Then the transfer module takes the barrel body out of the freezing cylinder 21 and turns the barrel body over to a position with the barrel mouth facing downward and then transfers it to the striking station 3. The transfer module loosens the barrel body so that the barrel body falls into the receiving cylinder 31 and collides with the bottom plate 32. At this time, the impurities on the inner wall of the barrel can fall off relative to the inner wall of the barrel due to their solidified properties after freezing. Then the transfer module grabs the barrel body in the receiving cylinder 31 again and transfers it to the cleaning station 4, and the cleaning component further cleans the residual impurities on the inner wall of the barrel.

[0036] Compared with the prior art, the above scheme uses the liquid nitrogen in the freezing station 2 to convert the impurities on the inner wall of the barrel from a liquid state to a solidified state, and then receives the impact of the barrel body through the receiving cylinder 31 of the impact station 3, so that the impurities in the solidified state can be quickly and completely separated from the barrel body. Compared with the conventional cleaning method of flushing with clean water, it is more efficient and has a better impurity removal effect. Finally, the residual impurities on the inner wall of the barrel body are further cleaned by the cleaning station 4, ensuring a more thorough removal effect of the impurities in the barrel body. At the same time, the above scheme uses the impact method to achieve the separation of impurities from the inner wall of the barrel body. Compared with conventional impact, it has at least the following advantages: 1. After being frozen in the freezing station 2, the impurities in the barrel body are easily formed into a state of being solidified as a whole. Therefore, by impacting the entire barrel body, it is helpful to make the solidified impurities on the inner wall of the barrel body fall off as a whole, that is, the impurities are more completely separated from the barrel body; 2. The impurities in the barrel body have inertia. When the barrel body falls to the bottom plate 32 of the receiving cylinder 31 and stops, the impurities will continue to separate from the inner wall of the barrel body due to inertia, thereby achieving a better separation effect of the impurities relative to the inner wall of the barrel body; 3. Compared with the conventional method of knocking on the barrel body, when the barrel body using the dropping method falls to the bottom plate 32 of the receiving cylinder 31, the entire barrel body will be impacted, that is, the impact on the barrel body will be more comprehensive and more intense, which will help the impurities to separate from the inner wall of the barrel body; 4. The dropping method is achieved by the gravity of the barrel body itself, saving energy consumption.

[0037] Combine Figure 2 and Figure 4 As shown, as an improvement to the above embodiment, at least two check cylinders 22 are circumferentially arranged at the upper end of the freezing cylinder 21, and the cylinder rod of the check cylinder 22 is set toward the opening of the freezing cylinder 21, so that when the cylinder rod of the check cylinder 22 is extended, it can be in the opening position of the freezing cylinder 21, thereby pressing the barrel mouth end of the barrel body in the freezing cylinder 21, offsetting the upward buoyancy exerted by the liquid nitrogen on the barrel body, so that the transfer module does not need to continuously apply pressure to the barrel body, and the posture of the barrel body in the freezing cylinder 21 is more stable.

[0038] Combine Figure 5 As shown, taking into account that there may be differences in the size specifications of the barrel body, this embodiment further sets a first cylindrical limit frame 23 with a vertical axis in the freezing cylinder 21. The side wall of the first limit frame 23 is grid-shaped, and the inner side of the first limit frame 23 can be entered by the barrel body. The inner diameter of the upper end of the first limit frame 23 is larger than the inner diameter of the lower end, so that the first limit frame 23 can realize the vertical guidance effect of barrel bodies of different sizes and specifications, prevent the barrel body from overturning in the freezing cylinder 21, and help to improve the stability of the pressing effect of the check cylinder 22 on the barrel body.

[0039] Combine Figure 5 As shown, in this embodiment, at least two circumferentially arranged elastic buffers 34 may be provided on the upper side of the bottom plate 32 of the receiving cylinder 31. The elastic buffers 34 provide a certain degree of cushioning to the falling barrel, thereby preventing the barrel from being damaged by a hard collision with the bottom plate 32. The elastic buffers 34 are preferably rubber gaskets, or vertically arranged springs. When the barrel falls into the receiving cylinder 31, it will contact the rubber gaskets or springs, thereby providing a good cushioning effect on the barrel.

[0040] Furthermore, a second cylindrical limit frame 33 with a vertical axis is provided in the receiving cylinder 31. The side wall of the second limit frame 33 is grid-shaped, and the inner side of the second limit frame 33 is accessible to the barrel body. The inner diameter of the upper end of the second limit frame 33 is larger than the inner diameter of the lower end, so that the second limit frame 33 can vertically guide barrel bodies of different sizes, prevent the barrel body from overturning in the receiving cylinder 31, and ensure that the barrel body can be accurately buffered by the elastic buffer 34.

[0041] Combine Figure 3 As shown, as another improvement to the above embodiment, a vibrator 63 is provided on the second clamp 61, and the vibrator 63 is used to abut against the barrel body and drive the barrel body to vibrate, so that the barrel body can be pre-vibrated by the vibrator 63 before being dropped, so that the inner wall of the barrel body is partially separated from the impurities, and then when the barrel body is subsequently dropped, the impurities can fall off better relative to the inner wall of the barrel body.

[0042] Combine Figure 3 and Figure 5 As shown, regarding the cleaning assembly, in one embodiment, the cleaning assembly includes a collection basin 41, a rotating shaft 42 rotatably connected to the collection basin 41 about a vertical axis, a scraper connected to the upper end of the rotating shaft 42, and a rotating motor 43 that acts on the rotating shaft 42 to drive the rotating shaft 42 to rotate. The rotating shaft 42 drives the scraper to sweep the inner wall of the barrel, further removing residual impurities on the inner wall of the barrel, while the collection basin 41 can collect fallen impurities to prevent contamination. The scraper can take various forms, such as a brush 44, a scraper, a brush bar, etc., which are not limited to this.

[0043] In another embodiment, the cleaning component includes a collection basin 41, a rotating shaft 42 connected to the collection basin 41 with a vertical axis, and a rotating motor 43 acting on the rotating shaft 42 to drive the rotating shaft 42 to rotate. An air path is provided in the rotating shaft 42, and an air blowing head (not shown in the figure) connected to the air path is provided at the upper end of the rotating shaft 42. The air outlet of the air blowing head is arranged obliquely downward, and the air path of the rotating shaft 42 is used to supply air to the blowing head through an external blower, and the air blowing head can blow the inner wall of the barrel body as the rotating shaft 42 rotates, thereby further removing residual impurities on the inner wall of the barrel body, and the collection basin 41 can collect the fallen impurities to avoid pollution.

[0044] In another embodiment, the cleaning component includes a collection basin 41, a rotating shaft 42 connected to the collection basin 41 with a vertical axis, and a rotating motor 43 acting on the rotating shaft 42 to drive the rotating shaft 42 to rotate. An air path is provided in the rotating shaft 42, and a suction head (not shown in the figure) connected to the air path is provided at the upper end of the rotating shaft 42. A discharge port connected to the air path is provided at the lower end of the rotating shaft 42, so that the suction head is driven to rotate by the rotating shaft 42 to suction impurities on the inner wall of the barrel body, thereby further removing impurities remaining on the inner wall of the barrel body, and the impurities sucked in by the suction head are discharged from the discharge port into the collection basin 41 through the air path for collection to avoid pollution.

[0045] It should be noted that, in the description of this application, the terms "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application. All directional indications (such as up, down, left, right, front, back, inside and outside) are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0046] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0047] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A freezing barrel cleaning process, characterized in that: The steps include: S1. Ensure that the end cap of the barrel mouth is removed; S2. Immerse the barrel with the barrel opening facing upward into the liquid nitrogen, ensuring that the liquid nitrogen level does not exceed the barrel opening height. S3. After the impurities in the barrel are frozen, remove the barrel from the liquid nitrogen, flip the barrel so that the barrel mouth is downward, and then drop the barrel downward, so that the frozen impurities in the barrel are dropped relative to the barrel; S4. Lift the barrel and clean the inner wall of the barrel to remove any impurities remaining on the inner wall of the barrel.

2. The freezing barrel cleaning process according to claim 1, characterized in that: Before step S2, the barrel body is pre-cooled so that the temperature of the barrel body is maintained at -40 to 0 degrees Celsius, and then step S2 is entered.

3. The freezing barrel cleaning process according to claim 1 or 2, characterized in that: In step S2, the barrel is immersed in liquid nitrogen for 30 to 120 seconds.

4. The freezing barrel cleaning process according to claim 1, characterized in that: In step S3, the time interval between taking the barrel out of the liquid nitrogen and dropping the barrel downward is no more than 60 seconds.

5. The freezing barrel cleaning process according to claim 1, characterized in that: In step S3, before the barrel is dropped downward, the barrel is first vibrated laterally by a vibrator.

6. The freezing barrel cleaning process according to claim 1, characterized in that: In step S3, an elastic buffer is provided at the point where the barrel body falls downward, and the impact of the barrel body is buffered by the elastic buffer.

7. The freezing barrel cleaning process according to claim 1, characterized in that: In step S4, the specific method of cleaning the inner wall of the barrel is to sweep the inner wall of the barrel with a brush to achieve cleaning.

8. The freezing barrel cleaning process according to claim 1, characterized in that: In step S4, the specific method of cleaning the inner wall of the barrel is to spray air toward the inner wall of the barrel, and the spray direction is downward.

9. The freezing barrel cleaning process according to claim 1, characterized in that: In step S4, the specific method of cleaning the inner wall of the barrel is to use a suction machine to suck the inner wall of the barrel so that impurities are sucked into the suction machine.

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