Discharge assembly with sealing structure and mixer

Abstract

This utility model belongs to the field of mixer technology, and discloses a sealing structure for a discharge assembly and a mixer. The sealing structure for the discharge assembly includes a rotating component, a stationary component, a sealing cover, and a third sealing component. The rotating component is disposed on a mixing drum and has a discharge port for communicating with the inside of the mixing drum. The stationary component is sleeved on the outside of the rotating component and is positioned on the side of the rotating component away from the mixing drum. The sealing cover is closable and covers the discharge port. An air blowing passage is formed between the rotating component and the stationary component, and the air outlet of the air blowing passage is oriented away from the discharge port. The mixer includes an opening and closing actuator and a sealing structure for the discharge assembly. The telescopic output end of the opening and closing actuator is movably connected to the sealing cover, which can open or close the discharge port. Through the above configuration, the sealing structure for the discharge assembly and the mixer of this application can improve the quality and efficiency of powder mixing and prevent powder leakage.

Description

Technical Field

[0001] This utility model relates to the field of mixer technology, and in particular to a sealing structure for a discharge component and a mixer. Background Technology

[0002] In the modern powder industry, fields such as new energy powder materials and rare earth powder materials have increasingly stringent requirements for the cleanliness and pollution prevention of mixing equipment. In particular, the sealing performance of the discharge components of the mixing equipment directly affects the powder mixing quality and the goal of zero pollution in the production process.

[0003] However, in existing mixers, during the discharge process, because the sealing gap is close to the discharge end of the drum, powder discharged through the outlet can flow back into the drum through the sealing gap. Furthermore, since existing mixers use a backflushing device to remove residue from the filter media surface, this backflushing device may cause powder to flow backward into the drum during discharge, thus contaminating subsequent mixing. Meanwhile, existing mixers typically rely on manual closing of the sealing cover at the outlet to reduce dust overflow at the end of discharge; however, manual operation is time-consuming and labor-intensive, reducing operational efficiency and further exacerbating the problem of powder entering the drum through the sealing gap. In addition, leakage is prone to occur during mixing, making it difficult to meet the industry's high requirements for mixing operations.

[0004] Therefore, there is an urgent need for a sealing structure for the discharge assembly and a mixer to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a sealing structure for a discharge assembly, which can improve the quality of powder mixing and operational efficiency, and prevent powder leakage.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A sealing structure for a discharge assembly, comprising:

[0008] A rotating component is disposed on the mixing drum and has a discharge port for communicating with the interior of the mixing drum;

[0009] The stationary component is sleeved on the outside of the rotating component and positioned on the side of the rotating component away from the mixing drum;

[0010] A sealing cap is closable and can be installed on the discharge port. An air blowing passage is formed between the rotating part and the stationary part, and the air outlet of the air blowing passage is oriented away from the discharge port.

[0011] The third sealing element can be sandwiched between the sealing cover and the rotating element.

[0012] Optionally, the air blowing passage is provided with a plurality of guide grooves at intervals along its own extension direction.

[0013] Optionally, along the extension direction of the air blowing passage, the cross-sectional shape of the guide groove is one or more of a semi-circular, toothed, or rectangular shape.

[0014] Optionally, the sealing structure for the discharge assembly further includes a first sealing element, which is sandwiched between the stationary element and the rotating element, and positioned between the rotating element and the air blowing passage.

[0015] Optionally, the sealing structure for the discharge assembly further includes a second seal, which is sandwiched between the rotating member and the mixing drum.

[0016] Optionally, a pressure stabilizing chamber is provided at the other end of the air blowing passage away from the air outlet.

[0017] Another objective of this invention is to provide a mixer that can improve the quality and efficiency of powder mixing and prevent powder leakage.

[0018] To achieve this objective, the present invention adopts the following technical solution:

[0019] A mixer, characterized in that it includes an opening and closing drive and a sealing structure for the discharge assembly as described above, wherein the telescopic output end of the opening and closing drive is movably connected to the sealing cover, the sealing cover and the rotating member are taperedly fitted, and when the opening and closing drive drives the sealing cover to move toward the discharge port, the sealing cover can abut against the rotating member to close the discharge port; when the opening and closing drive drives the sealing cover to move away from the discharge port, the discharge port can be opened; when the sealing cover is placed on the discharge port, the rotating member rotates relative to the stationary member, causing the sealing cover to rotate.

[0020] Optionally, the mixer further includes a discharge pipe connected to the discharge port, and the air outlet is connected to the discharge pipe.

[0021] Optionally, the telescopic output end of the opening / closing driver is rotatably connected to the sealing cover.

[0022] Optionally, the mixer further includes a telescopic dust cover, which is fitted over the telescopic output end of the opening and closing driver.

[0023] The beneficial effects of this utility model are:

[0024] This utility model provides a sealing structure for a discharge assembly, comprising a rotating component, a stationary component, a sealing cover, and a third sealing component. The rotating component is disposed on a mixing drum and has a discharge port for communicating with the interior of the mixing drum. The stationary component is sleeved on the outside of the rotating component and positioned on the side of the rotating component away from the mixing drum, thereby preventing the sealing gap between the rotating component and the stationary component from approaching the discharge port, thus reducing the possibility of powder flowing back into the mixing drum through the sealing gap. The sealing cover is closable and can be placed over the discharge port. The third sealing component can be sandwiched between the sealing cover and the rotating component to improve the sealing performance between the sealing cover and the discharge port, preventing powder leakage from the mixing drum. An air blowing passage is formed between the rotating component and the stationary component, with the air outlet of the air blowing passage facing away from the discharge port, preventing powder from flowing back into the mixing drum during air blowing and preventing contamination of subsequent mixing processes. Through the above configuration, the sealing structure for the discharge assembly of this application can improve the quality of powder mixing and operational efficiency, and prevent powder leakage.

[0025] This utility model also provides a mixer, which includes an opening and closing drive and a sealing structure for the discharge assembly. The telescopic output end of the opening and closing drive is movably connected to the sealing cover, enabling it to open or close the discharge port. Furthermore, the movable connection ensures a tight fit between the sealing cover and the discharge port, reducing the problem of powder entering the drum through sealing gaps. When the opening and closing drive moves the sealing cover towards the discharge port, the sealing cover abuts against the rotating component to close the discharge port. Due to the tapered fit between the sealing cover and the rotating component, the contact area between them is increased, allowing for a tighter fit under the drive of the opening and closing drive, thus preventing powder leakage due to localized gaps. When the opening and closing drive moves the sealing cover away from the discharge port, it opens the discharge port, thus achieving automated opening and closing of the discharge port, replacing manual operation and improving work efficiency. When the sealing cover is positioned over the discharge port, the rotating component rotates relative to the stationary component, causing the sealing cover to rotate, ensuring the sealing of the discharge port and guaranteeing smooth mixing operations. With the above-mentioned settings, the mixer of this application can improve the quality and efficiency of powder mixing and prevent powder leakage. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the mixer provided in an embodiment of the present utility model;

[0027] Figure 2 This is a schematic diagram of the sealing structure for the discharge assembly provided in this embodiment of the utility model;

[0028] Figure 3 This is a cross-sectional view of the sealing structure for the discharge assembly provided in this embodiment of the utility model;

[0029] Figure 4This is a schematic diagram of the air blowing passage provided in an embodiment of the present invention.

[0030] In the picture:

[0031] 100. Mixing drum; 1. Rotating component; 11. Discharge port; 12. Mounting groove; 2. Stationary component; 21. Air blowing passage; 211. Air outlet; 212. Guide groove; 213. Pressure stabilizing chamber; 3. Sealing cover; 4. First seal; 5. Second seal; 6. Third seal; 8. Opening and closing actuator; 9. Discharge pipe; 10. Telescopic dust cover; 20. Short shaft; 30. Outer sleeve. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] In the modern powder industry, fields such as new energy powder materials and rare earth powder materials have increasingly stringent requirements for the cleanliness and pollution prevention of mixing equipment. In particular, the sealing performance of the discharge components of the mixing equipment directly affects the powder mixing quality and the goal of zero pollution in the production process.

[0037] However, in existing mixers, during the discharge process, because the sealing gap is close to the discharge end of the drum, powder discharged through the outlet can flow back into the drum through the sealing gap. Furthermore, since existing mixers use a backflushing device to remove residue from the filter media surface, this backflushing device may cause powder to flow backward into the drum during discharge, thus contaminating subsequent mixing. Meanwhile, existing mixers typically rely on manual closing of the sealing cover at the outlet to reduce dust overflow at the end of discharge; however, manual operation is time-consuming and labor-intensive, reducing operational efficiency and further exacerbating the problem of powder entering the drum through the sealing gap. In addition, leakage is prone to occur during mixing, making it difficult to meet the industry's high requirements for mixing operations.

[0038] Therefore, there is an urgent need for a sealing structure for the discharge assembly and a mixer to solve the above-mentioned technical problems.

[0039] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] like Figures 1-4 As shown, this embodiment provides a sealing structure for a discharge assembly, which includes a rotating component 1, a stationary component 2, a sealing cover 3, and a third sealing component 6. The rotating component 1 is disposed on the mixing drum 100 and has a discharge port 11 for communicating with the interior of the mixing drum 100. The stationary component 2 is sleeved on the outside of the rotating component 1 and is placed on the side of the rotating component 1 away from the mixing drum 100. The sealing cover 3 is closable and covers the discharge port 11. An air blowing passage 21 is formed between the rotating component 1 and the stationary component 2, and the air outlet 211 of the air blowing passage 21 is arranged in a direction away from the discharge port 11.

[0041] In this embodiment, the rotating component 1 is disposed on the mixing drum 100 and has a discharge port 11 for communicating with the interior of the mixing drum 100. The stationary component 2 is sleeved on the outside of the rotating component 1 and is positioned on the side of the rotating component 1 away from the mixing drum 100. This prevents the sealing gap between the rotating component 1 and the stationary component 2 from approaching the discharge port 11, thereby reducing the possibility of powder flowing back into the mixing drum 100 through the sealing gap. The sealing cover 3 is closable and covers the discharge port 11. The third sealing component 6 can be sandwiched between the sealing cover 3 and the rotating component 1 to improve the sealing performance between the sealing cover 3 and the discharge port 11 and prevent powder leakage from the mixing drum 100. An air blowing passage 21 is formed between the rotating component 1 and the stationary component 2. The air outlet 211 of the air blowing passage 21 is oriented away from the discharge port 11 to prevent the powder from flowing back into the mixing drum 100 during air blowing, thus preventing contamination of subsequent mixing. Through the above-mentioned settings, the sealing structure of the discharge component in this embodiment can improve the quality of powder mixing and the efficiency of operation, thereby solving the problems of powder backflow pollution and low operation efficiency, and meeting the industry's high requirements for mixing operations.

[0042] It should be noted that, since the rotating component 1 is mounted on the mixing drum 100 and rotates together with it, the rotating component 1 can achieve a rotational connection with the stationary component 2 through bearing transmission or sprocket transmission. This ensures smooth rotation and high transmission efficiency between the rotating component 1 and the stationary component 2, avoiding problems such as rotational jamming and component wear that could affect the overall stability of the sealing structure. Moreover, those skilled in the art are familiar with the above principles, and will not elaborate further here.

[0043] The specific structure of the sealing structure for the discharge assembly is described below:

[0044] Specifically, in this embodiment, the rotating component 1 is a moving ring, and the stationary component 2 is a stationary ring. The rotating component 1 is connected to the stationary component 2 via a slewing bearing. The inner ring of the slewing bearing is fixedly connected to the moving ring, and the outer ring of the slewing bearing is fixedly connected to the stationary ring. This arrangement ensures that the moving ring and the stationary ring always maintain coaxiality, which is beneficial to improving the stability of the structural connection. Since the slewing bearing has the ability to withstand both radial and axial loads simultaneously, it can adapt to the complex stress scenarios when the mixing drum 100 rotates. In addition, the sealing cover 3 is a movable sealing plate. During the mixing stage, it can tightly cover the discharge port 11 to ensure that a sealed environment is formed inside the mixing drum 100, preventing the powder from being dusted or contaminated by external impurities during the rotation of the mixing drum 100. During the discharge stage, the movable sealing plate can be quickly opened to provide a smooth channel for the powder to be discharged, ensuring discharge efficiency. In other embodiments, the rotating component 1 is a rotating sleeve, the stationary component 2 is a fixed sleeve, and the sealing cover 3 is a flip-up cover. The specific structure of the above components is not limited here, as long as the above functions can be achieved.

[0045] Specifically, the other end of the air blowing passage 21 away from the air outlet 211 is provided with a pressure stabilizing chamber 213. Compressed gas is injected into the pressure stabilizing chamber 213 by an air compressor or a high-pressure air pump, so that the airflow can be more evenly distributed when it enters the pressure stabilizing chamber 213, further improving the pressure equalization effect of the pressure stabilizing chamber 213, and avoiding the airflow concentration and pressure change caused by the lack of buffer space when the gas is directly introduced into the air blowing passage 21.

[0046] Specifically, the air blowing passage 21 is provided with multiple guide grooves 212 at intervals along its extension direction, which can form multiple interceptions and buffers for the airflow in the air blowing passage 21, thereby enhancing the airflow barrier effect. Moreover, by setting the guide grooves 212, the powder overflowing and flowing back during the discharge process of the mixing roller 100 can be intercepted, thereby improving the reliability of the airflow seal and the powder blocking effect.

[0047] More specifically, along the extension direction of the air blowing passage 21, the cross-sectional shape of the guide groove 212 is one or more of a semi-circular, toothed, or rectangular shape, so as to adapt to different application scenarios with different airflow intensities and powder particle sizes.

[0048] More specifically, in this embodiment, the cross-sectional shape of the guide groove 212 along the extension direction of the air blowing passage 21 is semi-circular. Since the semi-circular cross-section is smooth and without sharp edges, it can effectively guide the airflow to form a vortex-like obstruction in the guide groove 212, which enhances the airflow retention, improves the gas sealing effect, and facilitates smooth airflow, preventing powder from accumulating in the guide groove 212.

[0049] Specifically, the sealing structure for the discharge assembly also includes a first sealing element 4. The first sealing element 4 is sandwiched between the stationary element 2 and the rotating element 1, and is positioned between the rotating element 1 and the air blowing passage 21. By sandwiching the first sealing element 4 between the stationary element 2 and the rotating element 1 to fill the gap between the rotating element 1 and the stationary element 2, the sealing effect between the two is improved. Moreover, this arrangement can assist in air sealing to improve the overall sealing performance of the structure. In addition, by placing the first sealing element 4 between the rotating element 1 and the air blowing passage 21, a further sealing barrier can be formed between the rotating element 1 and the air blowing passage 21. When powder enters the air blowing passage 21 and causes blockage or failure of the airflow barrier, the first sealing element 4 can promptly block the powder and prevent it from flowing back to the mixing drum 100.

[0050] Specifically, multiple first seals 4 are provided, and the multiple first seals 4 are spaced apart along the axial direction of the stationary member 2, thereby forming multiple sealing barriers to prevent powder backflow from the mixing drum 100.

[0051] More specifically, in this embodiment, there are two first seals 4, which face each other and are spaced apart, thereby enhancing the sealing effect of the overall structure. In other embodiments, there are three or four first seals 4. The specific number of first seals 4 is not limited here, as long as the above-mentioned functions can be achieved.

[0052] Specifically, the inner circumferential wall of the rotating part 1 is provided with an installation groove 12, and the first sealing element 4 is embedded in the installation groove 12, thereby providing a stable installation position for the first sealing element 4 and preventing the first sealing element 4 from shifting or falling off during the rotation of the rotating part 1.

[0053] Specifically, in this embodiment, the first sealing element 4 is a lip seal ring, whose lip has good elasticity and can tightly fit the surface of the stationary element 2. When the rotating element 1 rotates at high speed, the lip seal ring can also maintain stable contact with the stationary element 2, thereby ensuring the reliability of the dynamic seal between the rotating element 1 and the stationary element 2. In other embodiments, the first sealing element 4 is a U-shaped seal ring or a V-shaped seal ring, which can also achieve the dynamic sealing effect between the rotating element 1 and the stationary element 2, and no further limitations are made here.

[0054] Specifically, the sealing structure for the discharge assembly also includes a second sealing element 5, which is sandwiched between the rotating element 1 and the mixing drum 100, thereby filling the assembly gap between the rotating element 1 and the mixing drum 100, enhancing the sealing of the connection between the two, and preventing the powder in the mixing drum 100 from leaking.

[0055] More specifically, in this embodiment, the second sealing element 5 is an O-ring, which has good elasticity and strong sealing performance, and can tightly fit the contact surface between the rotating element 1 and the mixing drum 100. In other embodiments, the second sealing element 5 is a Y-ring or a rectangular sealing ring, which can also achieve the sealing effect between the rotating element 1 and the mixing drum 100, and no further limitations are made here.

[0056] Specifically, the third sealing element 6 is sandwiched between the sealing cover 3 and the rotating element 1, thereby filling the assembly gap between the rotating element 1 and the sealing cover 3, enhancing the sealing performance of the connection between the two, and preventing the powder in the mixing drum 100 from leaking.

[0057] Specifically, in this embodiment, the third sealing element 6 is an O-ring, which has good elasticity and strong sealing performance, and can tightly fit the contact surface between the rotating part 1 and the sealing cover 3. In other embodiments, the third sealing element 6 is a Y-ring or a rectangular sealing ring, which can also achieve the sealing effect between the rotating part 1 and the sealing cover 3, and no further limitations are made here.

[0058] like Figures 1-4As shown, this embodiment also provides a mixer, which includes an opening and closing drive 8 and a sealing structure for the above-mentioned discharge assembly. The telescopic output end of the opening and closing drive 8 is movably connected to the sealing cover 3, which can open or close the discharge port 11 without manual operation, reducing the labor intensity of the operator. The sealing cover 3 and the rotating part 1 are taperedly fitted. When the opening and closing drive 8 drives the sealing cover 3 to move towards the discharge port 11, the sealing cover 3 can abut against the rotating part 1 to close the discharge port 11; when the opening and closing drive 8 drives the sealing cover 3 to move away from the discharge port 11, the discharge port 11 can be opened; when the sealing cover 3 is placed on the discharge port 11, the rotating part 1 rotates relative to the stationary part 2, causing the sealing cover 3 to rotate.

[0059] In this embodiment, the mixer includes an opening / closing actuator 8 and a sealing structure for the discharge assembly. The telescopic output end of the opening / closing actuator 8 is movably connected to the sealing cover 3, enabling it to open or close the discharge port 11. Furthermore, this movable connection ensures a tight fit between the sealing cover 3 and the discharge port 11, reducing the problem of powder entering the drum through sealing gaps. When the opening / closing actuator 8 drives the sealing cover 3 towards the discharge port 11, the sealing cover 3 abuts against the rotating component 1 to close the discharge port 11. Due to the tapered fit between the sealing cover 3 and the rotating component 1, the contact area between them is increased. Under the driving action of the opening / closing actuator 8, the sealing cover 3 and the rotating component 1 fit more tightly, preventing local gaps and powder leakage. When the opening / closing actuator 8 drives the sealing cover 3 away from the discharge port 11, the discharge port 11 is opened, thus achieving automated opening and closing of the discharge port 11, replacing manual operation and improving operational efficiency. When the sealing cap 3 is placed over the discharge port 11, the rotating component 1 rotates relative to the stationary component 2, causing the sealing cap 3 to rotate, thus ensuring the sealing of the discharge port 11 and ensuring the smooth progress of the mixing operation. Through the above configuration, the mixer in this embodiment can improve the quality and efficiency of powder mixing. This solves the problems of powder backflow contamination and low operating efficiency, meeting the industry's high requirements for mixing operations.

[0060] It should be noted that the sealing cover 3 and the rotating part 1 are taper-fitted. The taper fit between the two can form a wedge-shaped sealing structure on the contact surface of the sealing cover 3 and the rotating part 1, thereby increasing the contact area between the sealing cover 3 and the rotating part 1, improving the tightness of the fit, and preventing local gaps from causing powder leakage.

[0061] Furthermore, by setting up the opening and closing actuator 8, manpower can be saved, work efficiency can be improved, and the consistency of each opening and closing action can be ensured, guaranteeing the fitting accuracy between the sealing cover 3 and the discharge port 11. In addition, the movable connection between the telescopic output end of the opening and closing actuator 8 and the sealing cover 3 can ensure a tight fit between the sealing cover 3 and the discharge port 11, reducing the problem of powder entering the mixing drum 100 through the sealing gap, and preventing the sealing cover 3 from interfering with the opening and closing actuator 8 when rotating with the rotating part 1. The aforementioned movable connection includes, but is not limited to, bearing connections, hinge connections, or ball joint connections, and is not limited in detail here, as long as it can achieve the above-mentioned functions.

[0062] The specific structure of the hybrid mechanism is explained below:

[0063] Specifically, the mixer also includes a discharge pipe 9 connected to the discharge port 11, and an air outlet 211 connected to the discharge pipe 9, thereby providing a stable conveying channel for the discharged powder and preventing the powder from scattering near the discharge port 11, causing waste and environmental pollution.

[0064] Specifically, the telescopic output end of the opening and closing driver 8 is rotatably connected to the sealing cover 3. When the mixing drum 100 rotates, it drives the rotating part 1 and the sealing cover 3 to rotate together, thereby ensuring the safety of the operation and avoiding interference.

[0065] More specifically, in this embodiment, the opening / closing actuator 8 is a cylinder, and the cylinder's telescopic rod is rotatably connected to the sealing cover 3 via a bearing, enabling rapid opening and closing of the sealing cover 3 and shortening the material discharge preparation time. Furthermore, by incorporating the bearing, it can be ensured that the sealing cover 3 is not restricted by the telescopic rod during rotation, achieving coordination between the driving and rotational actions. In other embodiments, the opening / closing actuator 8 is a hydraulic cylinder, and the hydraulic cylinder's telescopic rod is rotatably connected to the sealing cover 3 via a thrust bearing, achieving the same effect. It is understood that the specific structure of the above components is not limited, as long as the aforementioned functions are achieved.

[0066] More specifically, in this embodiment, the mixer further includes a short shaft 20 and an outer sleeve 30. The cylinder's telescopic rod is fixedly connected to the inner ring of the bearing via the short shaft 20, thereby extending the force transmission distance of the telescopic rod. This allows the cylinder to be installed in an area away from dust, preventing powder from entering the cylinder and causing damage. The sealing cover 3 is fitted onto the outer sleeve 30 and fixedly connected to the outer ring of the bearing via the outer sleeve 30. By setting the outer sleeve 30, the sealing cover 3 can be circumferentially fixed, ensuring a more stable connection between the sealing cover 3 and the outer ring of the bearing, thereby improving the overall structural stability.

[0067] Specifically, the mixer also includes a telescopic dust cover 10, which is fitted on the outside of the telescopic output end of the opening and closing driver 8, thereby providing physical protection for the telescopic output end of the opening and closing driver 8 and blocking external dust, powder and other impurities from entering.

[0068] More specifically, in this embodiment, the telescopic dust cover 10 is fixedly connected to the short shaft 20 and can reciprocate along the driving direction of the opening and closing driver 8 to ensure continuous dust protection throughout the entire stroke range of the telescopic output end of the opening and closing driver 8, preventing impurities from entering the interior of the opening and closing driver 8 and maintaining its stable working performance.

[0069] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A sealing structure for the discharge assembly, characterized in that, include: A rotating component (1) is disposed on a mixing drum (100) and has a discharge port (11) for communicating with the interior of the mixing drum (100). The stationary part (2) is sleeved on the outside of the rotating part (1) and placed on the side of the rotating part (1) away from the mixing drum (100); A sealing cap (3) is provided on the discharge port (11) in an openable and closable manner. An air blowing passage (21) is formed between the rotating part (1) and the stationary part (2). The air outlet (211) of the air blowing passage (21) is arranged in a direction away from the discharge port (11). The third sealing element (6) can be sandwiched between the sealing cover (3) and the rotating element (1).

2. The sealing structure for the discharge assembly according to claim 1, characterized in that, The air blowing passage (21) is provided with a plurality of guide grooves (212) at intervals along its own extension direction.

3. The sealing structure for the discharge assembly according to claim 2, characterized in that, Along the extension direction of the air blowing passage (21), the cross-sectional shape of the guide groove (212) is one or more of the following: semi-circular, toothed, or rectangular.

4. The sealing structure for the discharge assembly according to claim 1, characterized in that, The sealing structure of the discharge assembly also includes a first sealing element (4), which is sandwiched between the stationary element (2) and the rotating element (1) and placed between the rotating element (1) and the air blowing passage (21).

5. The sealing structure for the discharge assembly according to claim 1, characterized in that, The sealing structure for the discharge assembly also includes a second sealing element (5), which is sandwiched between the rotating element (1) and the mixing drum (100).

6. The sealing structure for the discharge assembly according to claim 1, characterized in that, The air blowing passage (21) is provided with a pressure stabilizing chamber (213) at the other end away from the air outlet (211).

7. A mixer, characterized in that, The device includes an opening and closing actuator (8) and a sealing structure for the discharge assembly as described in any one of claims 1-6. The telescopic output end of the opening and closing actuator (8) is movably connected to the sealing cover (3). The sealing cover (3) and the rotating member (1) are in a tapered fit. When the opening and closing actuator (8) drives the sealing cover (3) to move toward the discharge port (11), the sealing cover (3) can abut against the rotating member (1) to close the discharge port (11). When the opening and closing actuator (8) drives the sealing cover (3) to move toward the direction away from the discharge port (11), the discharge port (11) can be opened. When the sealing cover (3) is placed on the discharge port (11), the rotating member (1) rotates relative to the stationary member (2) to drive the sealing cover (3) to rotate.

8. The mixer according to claim 7, characterized in that, The mixer also includes a discharge pipe (9) connected to the discharge port (11), and the air outlet (211) is connected to the discharge pipe (9).

9. The mixer according to claim 7, characterized in that, The telescopic output end of the opening and closing driver (8) is rotatably connected to the sealing cover (3).

10. The mixer according to claim 7, characterized in that, The mixer also includes a telescopic dust cover (10), which is fitted on the outside of the telescopic output end of the opening and closing driver (8).

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