A discharge mechanism for a container

Abstract

The utility model discloses a kind of discharging mechanisms for container, specifically, the discharging mechanism includes: main pipeline, it has oppositely arranged first end and second end, main pipeline is connected to the outside of container discharge port by first end, and the wall surface of main pipeline is provided with discharge hole;Plug, it is located inside main pipeline, plug includes sealing unit, sealing unit is close to first end setting, is configured as: metal material with first thermal expansion coefficient;Driving assembly, from second end into main pipeline interior to be connected with plug, and for driving plug moves between first position and second position along the extension direction of main pipeline. The discharging mechanism of the utility model is simple in structure, good in sealing when continuous production, can discharge quickly and realizes automatic control, long in service life, wide in application range.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, specifically to a material discharge mechanism for a container. Background Technology

[0002] As is well known, in the chemical, food, pharmaceutical, and metallurgical industries, discharge valves are installed below various solid or liquid storage tanks for discharging materials from these containers. As a key component controlling material discharge, the performance of the discharge valve directly affects the continuity and safety of production, as well as the quality of the products.

[0003] Traditional discharge valves face numerous problems under high temperature and pressure conditions: First, traditional discharge valves contain sealing units, which are prone to aging, hardening, or melting due to high temperatures. This prevents effective sealing during continuous production, causing environmental pollution and potential safety accidents, especially with flammable, explosive, or toxic chemicals. Second, some discharge valves are prone to material accumulation in dead zones, particularly with highly viscous flexible polymers. Under pressure, the material tends to adhere everywhere, resulting in slow discharge speeds and incomplete discharge, extending production cycles. Furthermore, existing discharge valves are prone to jamming when rapid discharge is needed, failing to respond promptly and reducing production efficiency. Finally, existing discharge valves lack automation, failing to meet the demands of large-scale, continuous production, requiring frequent manual operation, increasing labor costs and the risk of human error.

[0004] Therefore, developing a discharge valve that can operate reliably under high temperature and pressure conditions, has good sealing performance, smooth discharge, and can be automatically and precisely controlled has become an urgent problem to be solved in the chemical industry. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of existing discharge valves, such as the easy occurrence of dead corner material accumulation and poor sealing and low degree of automation control in continuous production, thereby providing a discharge mechanism for containers.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] This utility model provides a discharge mechanism for a container, which is disposed on the outside of the container's discharge port. The discharge mechanism includes:

[0008] The main pipe has a first end and a second end that are disposed opposite to each other. The main pipe is connected to the outside of the container outlet through the first end, and a discharge hole is opened on the wall of the main pipe.

[0009] A valve plug is disposed inside the main pipe. The valve plug includes a sealing unit disposed near the first end. The sealing unit is configured as a metallic material having a first coefficient of thermal expansion.

[0010] A drive assembly extends from the second end into the interior of the main pipe to connect with the valve plug, the drive assembly being used to move the valve plug between a first position and a second position along the extension direction of the main pipe;

[0011] When the valve plug is configured in the first position, the sealing unit extends into the container outlet. When the ambient temperature of the sealing unit rises, the sealing unit expands to conformally fit the sealing unit and the container outlet, achieving a completely sealed state. The container outlet and the discharge hole are disconnected. When the valve plug is configured in the second position, the sealing unit moves away from the container outlet, allowing the container outlet and the discharge hole to communicate.

[0012] When the valve plug is in the first position, the sealing unit has an initial state and a heated state. The sealing unit is configured such that: in the initial state, a preset annular gap is formed between the outer wall of the sealing unit and the inner wall of the container outlet; when the environment of the sealing unit rises, it is in the heated state, and the sealing unit expands to fit tightly against the container outlet.

[0013] The main pipeline may include a first pipeline and a second pipeline. The connection between the first pipeline and the second pipeline can be configured as an integral structure or a split connection structure: when an integral structure is adopted, the first pipeline and the second pipeline are integrally formed, and the two are formed into an inseparable integral structure by casting, forging or integral machining; when a split connection structure is adopted, the first pipeline and the second pipeline are independent components, and the two are assembled and fixed into one by means of a detachable connection method, which includes, but is not limited to, one or more of flange connection, threaded connection, welding, snap-fit, bolt connection and riveting.

[0014] The valve plug may further include a connecting seat, which is connected to the sealing unit and is disposed further away from the first end than the sealing unit. The connecting seat is configured as a metal material having a second coefficient of thermal expansion, which is smaller than the first coefficient of thermal expansion. The connecting seat can effectively increase the overall length of the valve plug, thereby optimizing the sealing effect of the valve plug; at the same time, the connection between the connecting seat and the drive assembly is more stable and reliable, and the drive assembly can precisely control the valve plug.

[0015] The connecting seat may include a connecting pipe and a connecting cover that are connected to each other. The two ends of the connecting pipe are respectively connected to the sealing unit and the connecting cover, and the end of the connecting cover away from the connecting pipe is connected to the drive assembly. The connection relationship between the connecting pipe and the connecting cover can be configured as an integral structure or a separate connection structure: when an integral structure is used, the connecting pipe and the connecting cover are integrally formed, and the two are formed into an inseparable integral structure by casting, forging or integral machining; when a separate connection structure is used, the connecting pipe and the connecting cover are independent components, and the two are assembled and fixed into one by means of a detachable connection method, which includes, but is not limited to, one or more of flange connection, threaded connection, welding, snap-fit, bolt connection and riveting.

[0016] The metal material having a first coefficient of thermal expansion and the metal material having a second coefficient of thermal expansion may be, but are not limited to, metal materials commonly used in the art. Specifically, the metal material having a first coefficient of thermal expansion and the metal material having a second coefficient of thermal expansion may be independently selected from one or more of the following groups: a) Steel materials group: including carbon steel, alloy steel, stainless steel, and cast iron; b) Light metal alloy group: including aluminum alloys, magnesium alloys, and titanium alloys; c) Non-ferrous metal group: including copper alloys, nickel alloys, and their derivative alloys.

[0017] The shape of the end of the sealing unit near the first end is the same as the cross-sectional shape of the container outlet. The fit between the sealing unit and the container outlet is designed to be adaptively adjusted with temperature changes: In the initial state, the sealing unit is not fully embedded in the container outlet, and a preset annular gap is formed between them, which can isolate the initial material in the container; as the temperature inside the container rises, the sealing unit expands in volume due to heat, and its outer circumference gradually increases until it fully fits the container outlet, thereby making the sealing unit and the container outlet in close contact, and the container reaches a completely sealed state.

[0018] The outer surface of the sealing unit is mirror-like and has a high gloss, which can effectively reduce the adhesion of materials inside the container and prevent material jamming. At the same time, it does not require manual cleaning, reducing labor costs and the risk of human error.

[0019] The sealing unit has a first boss and a first recess at one end near the second end, with the first recess surrounding the outer periphery of the first boss; the connecting seat has a second boss and a second recess at one end near the first end, with the second boss surrounding the outer periphery of the second recess; the first boss and the second recess are fitted together, and the second boss and the first recess are fitted together.

[0020] The valve plug also includes a connector that passes through the second boss and the first boss to connect the sealing unit and the connecting seat.

[0021] The overall length of the valve plug can be configured to be highly flexible and adaptable, and it independently has a first working length or a second working length to adapt to different sealing requirements; the second working length is greater than the first working length; when the valve plug has the first working length, the valve plug located at the first position seals the container outlet, and the inside of the main pipe is connected to the outside through the discharge hole; when the valve plug has the second working length, during the process of the valve plug being driven to move between the first position and the second position, the valve plug always seals the end of the discharge hole away from the container outlet.

[0022] A guide structure is provided between the valve plug and the main pipe. Specifically, one of the outer wall of the valve plug and the inner wall of the main pipe has a groove extending along the extension direction of the main pipe, and the other has a corresponding protrusion extending along the extension direction of the main pipe. The protrusion is configured such that when the drive assembly drives the valve plug to move along the main pipe, the protrusion can be embedded in the groove and slide synchronously along the extension direction of the groove.

[0023] The drive assembly includes a lead screw and a drive component. The lead screw extends along the extension direction of the main pipe, with one side connected to the valve plug and the other side connected to the drive component. A cover plate with a threaded hole is provided at the second end of the main pipe. The lead screw extends along the extension direction of the main pipe, passes through the threaded hole, and is threadedly connected to it. The drive component drives the lead screw to rotate, thereby moving the valve plug along the extension direction of the main pipe. The drive component drives the lead screw in a reciprocating manner to move the valve plug toward or away from the container outlet to control material discharge and achieve container sealing. When discharge is required, the drive component provides a rapid response for quick material discharge.

[0024] In one embodiment, one or more guide structures may be provided between the valve plug and the main pipe.

[0025] In one embodiment, the lead screw is connected to the valve plug near the second end via a detachable connection, such as, but not limited to, flange connection, threaded connection, ferrule connection, clamp connection, and clamp connection.

[0026] In one embodiment, the sealing unit has a first boss and a first recess at one end near the second end, with the first boss surrounding the outer periphery of the first recess; the connecting seat has a second boss and a second recess at one end near the first end, with the second recess surrounding the outer periphery of the second boss; the first boss and the second recess are fitted together, and the second boss and the first recess are fitted together.

[0027] In one embodiment, the drive assembly may further include a position sensor connected to the drive assembly, such that when the valve plug is in the first position, there is a preset distance between the end of the sealing unit near the container outlet and the container outlet.

[0028] In one embodiment, the drive assembly may further include a protective cover to shield the lead screw, preventing it from being contaminated or damaged, while also enhancing the overall aesthetics.

[0029] In one embodiment, the position sensor is a proximity switch or a limit switch.

[0030] In one embodiment, the driving component is a geared motor.

[0031] In one embodiment, the drive unit is mounted on the right side of the cover plate.

[0032] In this invention, prefixes such as "first" and "second" are used merely to distinguish different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes to distinguish descriptive objects in this invention does not constitute a limitation on the described objects. The description of the described objects is found in the context of the claims or embodiments, and the use of such prefixes should not constitute unnecessary restrictions.

[0033] Based on common knowledge in the field, the above-mentioned preferred elements can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0034] The positive and progressive effects of this utility model are as follows:

[0035] 1. It uses metal materials and takes advantage of their plastic deformation properties to solve the problem of poor sealing during continuous production. No additional sealing structure is required. It has a simple structure, long service life, and wide applicability.

[0036] 2. The pull-out valve plug structure avoids material accumulation in dead corners, and the fast response of the drive component enables rapid material discharge, thereby improving production efficiency;

[0037] 3. Automated control can be achieved through position sensors, reducing labor costs and the risk of human error. Attached Figure Description

[0038] Figure 1 This is a cross-sectional view of the discharge mechanism according to an embodiment of the present disclosure;

[0039] Figure 2 for Figure 1 Enlarged view of the middle valve plug structure;

[0040] Figure 3 This is a cross-sectional view of the discharge mechanism according to another embodiment of the present disclosure;

[0041] Figure 4 for Figure 3 Enlarged view of the middle valve plug structure.

[0042] Explanation of reference numerals in the attached figures:

[0043] 0-Container outlet; 1-Main pipe; 11-First end; 12-Second end; 13-Discharge hole; 14-First pipe; 15-Second pipe; 16-Extension; 2-Valve plug; 21-Sealing unit; 211-First boss; 212-First recess; 22-Connecting seat; 221-Connecting pipe; 222-Connecting cover; 223-Second boss; 224-Second recess; 23-Groove; 3-Drive assembly; 31-Lead screw; 32-Drive component; 33-Protective cover; 4-Cover plate; 41-Threaded hole. Detailed Implementation

[0044] The technical solution of this utility model will be further described clearly and completely below through embodiments, but this does not limit the utility model to the scope of the described embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0045] Please also refer to Figures 1 to 4 This embodiment provides a discharge mechanism for a container, which is disposed on the outside of the container discharge port 0. The discharge mechanism includes a main pipe 1, a valve plug 2, and a drive assembly 3. The main pipe 1 has a first end 11 and a second end 12 disposed opposite to each other. The main pipe 1 is connected to the outside of the container discharge port 0 through the first end 11, and a discharge hole 13 is opened on the wall of the main pipe 1. The valve plug 2 is disposed inside the main pipe 1 and includes a sealing unit 21. The sealing unit 21 is configured as a metal material having a first coefficient of thermal expansion, which is close to the first end 11. The drive assembly 3 extends into the main pipe 1 from the second end 12 to connect with the valve plug 2. The drive assembly 3 is configured to drive the valve plug 2 to move between a first position and a second position along the extension direction of the main pipe 1 to close or open the container discharge port 0.

[0046] The shape of the end of the sealing unit 21 near the first end 11 is the same as the cross-sectional shape of the container outlet 0. The fit between the sealing unit 21 and the container outlet 0 is set to be adaptively adjustable with temperature changes. Specifically: when the valve plug 2 is configured in the first position, the sealing unit 21 has an initial state and a heated state. In the initial state, the sealing unit 21 partially extends into the container outlet 0 but does not extend into the container. A preset annular gap is formed between the outer wall of the sealing unit 21 and the inner wall of the container outlet 0. This gap can isolate the initial material in the container. When the ambient temperature of the sealing unit 21 rises, the sealing unit 21 expands in volume due to heat, and its outer circumference gradually increases so that the sealing unit 21 and the container outlet 0 conformally fit together, and the container reaches a completely sealed state. The container outlet 0 and the discharge hole 13 are disconnected. When the valve plug 2 is configured in the second position, the sealing unit 21 leaves the container outlet 0 so that the container outlet 0 and the discharge hole 13 are connected. This structure utilizes the thermal expansion characteristics of metals to achieve automatic switching from initial non-sealing to high-temperature sealing, eliminating the need for traditional flange structures or additional seals. This avoids poor sealing caused by uneven material adhesion and ensures excellent sealing performance under high-temperature conditions.

[0047] The term "conformal" here refers to the fact that the end face of the sealing unit 21 and the container outlet 0 are perfectly matched in shape. When the sealing unit 21 expands, the outer wall of the sealing unit 21 and the inner wall of the container outlet 0 fit tightly together. At the same time, the end face of the sealing unit 21 and the inner wall of the container form an integrated sealing surface, thereby achieving effective sealing.

[0048] The outer surface of the sealing unit 21 is mirror-like and has a high gloss, which can effectively reduce the adhesion of materials inside the container and prevent material jamming. At the same time, it does not require manual cleaning, reducing labor costs and the risk of human error.

[0049] The valve plug 2 includes a connecting seat 22, which is configured as a metal material with a second coefficient of thermal expansion, which is less than the first coefficient of thermal expansion. The connecting seat 22 is located further away from the first end 11 than the sealing unit 21. The connecting seat 22 can effectively increase the overall length of the valve plug 2, thereby optimizing the sealing effect of the valve plug 2. At the same time, the metal of the connecting seat 22 has a lower coefficient of thermal expansion than the sealing unit 21, making it less prone to deformation and resulting in a more stable and reliable connection with the drive assembly 3. The drive assembly 3 can then precisely control the valve plug 2.

[0050] In some embodiments, such as Figure 1As shown in Figure 2, the valve plug 2 has a first working length. The valve plug 2, located in the first position, seals the container outlet 0, and the main pipe 1 is connected to the outside through the discharge hole 13. In this case, the valve plug 2 focuses on effectively sealing the container outlet 0 to ensure that the material inside the container will not leak from the container outlet 0 when it is not discharging.

[0051] In other embodiments, such as Figure 3 As shown in Figure 4, the valve plug 2 has a second working length, which is greater than the first working length. This second working length ensures that the valve plug 2, during its movement between the first and second positions, always seals the end of the discharge hole 13 away from the container outlet. This design ensures that no material leakage occurs during the entire container discharge process, whether at the container outlet 0 or the discharge hole 13. This greatly improves the safety and environmental friendliness of the discharge process and effectively avoids a series of problems that may be caused by material leakage.

[0052] In some embodiments, such as Figure 2 As shown, the sealing unit 21 has a first boss 211 and a first recess 212 at one end near the second end 12, with the first recess 212 surrounding the outer periphery of the first boss 211; the connecting seat 22 has a second boss 223 and a second recess 224 at one end near the first end 11, with the second boss 223 surrounding the outer periphery of the second recess 224; the first boss 211 and the second recess 224 are tightly fitted together; the first recess 212 and the second boss 223 are tightly fitted together.

[0053] The valve plug 2 includes a connector that passes through the second boss 223 and the first boss 211 to connect the sealing unit 21 and the connecting seat 22.

[0054] In other embodiments, the sealing unit 21 has a first boss 211 and a first recess 212 at one end near the second end 12, with the first boss 211 surrounding the outer periphery of the first recess 212; the connecting seat 22 has a second boss 223 and a second recess 224 at one end near the first end 11, with the second recess 224 surrounding the outer periphery of the second boss 223; the first boss 211 and the second recess 224 are tightly fitted together; the first recess 212 and the second boss 223 are tightly fitted together.

[0055] The inner wall of the main pipe 1 is provided with a protrusion 16 extending along the extension direction of the main pipe 1, and the outer wall of the valve plug 2 is correspondingly provided with a groove 23 extending along the extension direction of the main pipe 1. The protrusion 16 is configured such that when the drive assembly 3 drives the valve plug 2 to move along the main pipe 1, the protrusion 16 can be embedded in the groove 23 and slide synchronously along the extension direction of the groove 23. Through this cooperation, the radial rotation or offset of the valve plug 2 during the driving process can be effectively limited, thereby stabilizing and fixing the movement direction of the valve plug 2, ensuring that the valve plug 2 always maintains the preset trajectory in the reciprocating motion, and improving the accuracy of the cooperation between the valve plug 2 and the container outlet.

[0056] The drive assembly 3 includes a lead screw 31 and a drive element 32. One side of the lead screw 31 is connected to the valve plug 2, and the other side is connected to the drive element 32. A cover plate 4 is provided at the second end 12 of the main pipe 1, and a threaded hole 41 is provided on the cover plate 4. The lead screw 31 extends along the extension direction of the main pipe 1, passes through the threaded hole 41, and is threadedly connected to the threaded hole 41. The drive element 32 drives the lead screw 31 to rotate, thereby moving the valve plug 2 along the extension direction of the main pipe 1. The drive element 32 drives the lead screw 31 to rotate, and the lead screw 31, threadedly connected to the threaded hole 41, moves along the extension direction of the main pipe 1, thereby moving the valve plug 2 towards or away from the container outlet 0, thus controlling the discharge of material and achieving container sealing. The valve plug 2 adopts a pull-out valve plug structure to avoid dead-angle material accumulation. When discharge is required, the drive element 32 responds quickly to achieve rapid discharge, thereby improving production efficiency. For example, the drive element 32 can be a motor, preferably a geared motor.

[0057] like Figure 3 As shown, the main pipeline 1 includes a first pipeline 14 and a second pipeline 15, which are assembled and fixed together by means of flange connection.

[0058] like Figure 4 As shown, the connecting seat 22 includes a connecting pipe 221 and a connecting cover 222 that are connected to each other. The connecting pipe 221 and the connecting cover 222 are assembled and fixed by welding.

[0059] In this embodiment, the sealing unit 21 of the valve plug 2 is made of aluminum alloy, and it is connected to the connecting seat 22, which is made of alloy steel, by rivets. The shape of the end of the sealing unit 21 near the first end 11 is the same as the cross-sectional shape of the container outlet 0. In the initial state, the driving member 32 inserts the valve plug 2 into the container outlet 0 through the driving screw 31, but there is a preset annular gap between them. As the temperature inside the container rises, the sealing unit 21 expands in volume due to heat, and its outer circumference gradually increases until it fully fits the inner wall of the container outlet 0, thereby completely sealing the container outlet 0. In the discharge state, the driving member 32 can respond quickly and use the driving screw 31 to disengage the valve plug 2 from the container outlet 0 in the direction away from the container, so as to achieve rapid discharge.

[0060] In this embodiment, the drive assembly 3 also includes a position sensor, which determines the position of the valve plug 2 to ascertain the position of the valve plug 2 in its initial state, ensuring that when the valve plug 2 is in the first position, there is a preset gap between the outer wall of the sealing unit 21 and the inner wall of the container outlet 0. Specifically, this position sensor avoids two situations: first, the valve plug 2 is too close to the container outlet 0, causing it to expand beyond the inner wall of the container and adversely affect the reaction inside the container; second, the distance between the valve plug 2 and the container outlet 0 is too far, making complete sealing impossible. This position sensor can be a proximity switch or a limit switch.

[0061] In this embodiment, the drive assembly 3 also includes a protective cover 33 to cover the lead screw 31, preventing the lead screw from being contaminated or damaged, while also enhancing the overall aesthetics.

[0062] The above detailed description is a specific description of one feasible embodiment of the present utility model. This embodiment is not intended to limit the patent scope of the present utility model. All equivalent implementations or modifications that do not depart from the present utility model should be included in the patent scope of this case.

Claims

1. A discharge mechanism for a container, characterized in that, It is used to be installed on the outside of the container outlet, and the discharge mechanism includes: The main pipe has a first end and a second end that are disposed opposite to each other. The main pipe is connected to the outside of the container outlet through the first end, and a discharge hole is opened on the wall of the main pipe. A valve plug is disposed inside the main pipe. The valve plug includes a sealing unit disposed near the first end. The sealing unit is configured as a metallic material having a first coefficient of thermal expansion. A drive assembly extends from the second end into the interior of the main pipe to connect with the valve plug, the drive assembly being used to move the valve plug between a first position and a second position along the extension direction of the main pipe; When the valve plug is configured in the first position, the sealing unit extends into the container outlet. When the ambient temperature of the sealing unit rises, the sealing unit expands to conformally fit the sealing unit and the container outlet, achieving a completely sealed state. The container outlet and the discharge hole are disconnected. When the valve plug is configured in the second position, the sealing unit moves away from the container outlet, allowing the container outlet and the discharge hole to connect and form a discharge passage.

2. The discharge mechanism as described in claim 1, characterized in that, When the valve plug is in the first position, the sealing unit has an initial state and a heated state. The sealing unit is configured such that: in the initial state, a preset annular gap is formed between the outer wall of the sealing unit and the inner wall of the container outlet; when the environment of the sealing unit is heated, it is in the heated state, and the sealing unit expands to fit tightly against the container outlet. And / or, the outer surface of the sealing unit is mirror-like; And / or, the metallic material having the first coefficient of thermal expansion is selected from one or more of the following groups: a) ferrous materials group: including carbon steel, alloy steel, stainless steel, cast iron; b) light metal alloys group: including aluminum alloys, magnesium alloys, titanium alloys; c) non-ferrous metals group: including copper alloys, nickel alloys and their derivative alloys.

3. The discharge mechanism as described in claim 1, characterized in that, The valve plug also includes a connecting seat, which is connected to the sealing unit and is disposed further away from the first end than the sealing unit. The connecting seat is configured as a metal material having a second coefficient of thermal expansion, which is less than the first coefficient of thermal expansion.

4. The discharge mechanism as described in claim 3, characterized in that, The metallic material having the second coefficient of thermal expansion is selected from one or more of the following groups: a) Iron and steel materials group: including carbon steel, alloy steel, stainless steel, and cast iron; b) Light metal alloys group: including aluminum alloys, magnesium alloys, and titanium alloys; c) Non-ferrous metals group: including copper alloys, nickel alloys, and their derivative alloys. And / or, the overall length of the valve plug is configured to independently have a first working length or a second working length, the second working length being greater than the first working length; when the valve plug has the first working length, the valve plug located at the first position seals the container outlet, and the interior of the main pipe communicates with the outside through the discharge hole; when the valve plug has the second working length, during the process of the valve plug being driven to move between the first and second positions, the valve plug always seals the end of the discharge hole away from the container outlet.

5. The discharge mechanism as described in claim 3, characterized in that, The connector includes a connecting tube and a connecting cover. The two ends of the connecting tube are respectively connected to the sealing unit and the connecting cover, and the end of the connecting cover away from the connecting tube is connected to the drive assembly. The connecting pipe is integrally formed with the connecting cover or is detachably connected.

6. The discharge mechanism as described in claim 3, characterized in that, The sealing unit is provided with a first protrusion and a first recess at one end near the second end, and the connecting seat is provided with a second protrusion and a second recess at one end near the first end; The first notch is disposed around the outer periphery of the first boss, and the second boss is disposed around the outer periphery of the second notch. The first boss and the second notch are fitted together, and the second boss and the first notch are fitted together; or, the first boss is disposed around the outer periphery of the first notch, and the second notch is disposed around the outer periphery of the second boss. The first boss and the second notch are fitted together, and the second boss and the first notch are fitted together.

7. The discharge mechanism as described in claim 1, characterized in that, The main pipeline includes a first pipeline and a second pipeline. The two ends of the first pipeline are respectively connected to the container outlet and the second pipeline. The end of the second pipeline away from the first pipeline is used for the drive assembly to extend into. The first pipe and the second pipe are integrally formed or detachably connected.

8. The discharge mechanism as described in claim 1, characterized in that, The drive assembly includes a lead screw and a drive member. The lead screw extends along the extension direction of the main pipe. One side of the lead screw is connected to the valve plug, and the other side is connected to the drive member. A cover plate is provided at the second end. A threaded hole is provided on the cover plate. The lead screw passes through the threaded hole and is threadedly connected to the threaded hole. The drive member is used to drive the lead screw to rotate, so as to move the valve plug along the extension direction of the main pipe.

9. The discharge mechanism as described in claim 1, characterized in that, A guide structure is provided between the valve plug and the main pipe. The guide structure includes a groove and a protrusion that cooperate with each other. The groove extends along the extension direction of the main pipe. One of the groove and the protrusion is disposed on the outer wall of the valve plug, and the other is disposed on the inner wall of the main pipe. The protrusion is configured such that when the drive assembly drives the valve plug to move along the main pipe, the protrusion can be embedded in the groove and slide synchronously along the extension direction of the groove.

10. The discharge mechanism as described in claim 1, characterized in that, It also includes a position sensor, which is connected to the drive assembly so that when the valve plug is in the first position, there is a preset gap between the outer wall of the sealing unit and the inner wall of the container outlet.

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