Sealing structure of a mixer

Abstract

The utility model belongs to the technical field of mixing machine discloses a sealing structure of mixing machine, it includes static piece and rotating piece. Static piece is equipped with at least one air inlet passageway, and the mixing machine cylinder is rotatably connected in static piece through rotating piece, and rotating piece is sleeved in the outside of static piece, and the one end of air inlet passageway is away from the mixing machine cylinder and is the air inlet end, and the other end forms the steady pressure chamber with rotating piece, along the axial direction of static piece, the spacing between the opposite two side walls of steady pressure chamber is greater than the inside diameter of air inlet passageway, and the pressurizing passageway is formed between static piece and rotating piece, and the both ends of pressurizing passageway are communicated with the inside of steady pressure chamber and mixing machine cylinder respectively. Through above setting, the sealing structure of mixing machine of the application can realize the pressure equalization and steady pressure effect to air flow, improves the sealing effect, and reduces the risk of material leakage and accumulation.

Description

Technical Field

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

[0002] In the field of powder material mixing and processing, drum mixers are widely used due to their high mixing efficiency. Their sealing structure is the core component for achieving zero powder leakage and ensuring the cleanliness of the mixed material.

[0003] However, the existing sealing structures of drum mixers have the following defects: First, most sealing structures only allow compressed gas to be directly introduced into the sealing area through a thin pipe, resulting in uneven airflow distribution and frequent airflow pressure fluctuations, making it difficult to achieve pressure equalization and stabilization. This leads to insufficient sealing barrier strength, poor sealing reliability, and a high risk of powder leakage. Second, the airflow cannot form a sufficiently strong isolation barrier after entering the sealing area, further exacerbating the problem of powder leakage. Third, some sealing structures use labyrinth-type components, but their complex labyrinth gaps easily trap powder, leading to significant material accumulation after long-term use. This not only damages the integrity of the sealing gaps, causing a gradual decline in sealing performance, but also increases the difficulty and maintenance cost of disassembling and cleaning the equipment.

[0004] Therefore, there is an urgent need for a sealing structure for the 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 mixer that can achieve pressure equalization and stabilization of airflow, improve the sealing effect, and reduce the risk of material leakage and accumulation.

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

[0007] A sealing structure for a mixer, comprising:

[0008] The stationary component is provided with at least one air intake passage;

[0009] A rotating component is rotatably connected to the stationary component via the mixing cylinder. The rotating component is sleeved on the outside of the stationary component. The end of the air intake passage away from the mixing cylinder is the air intake end, and the other end forms a pressure stabilizing cavity with the rotating component. Along the axial direction of the stationary component, the distance between the two opposite sidewalls of the pressure stabilizing cavity is greater than the inner diameter of the air intake passage. A pressurizing passage is formed between the stationary component and the rotating component, and the two ends of the pressurizing passage are respectively connected to the interior of the pressure stabilizing cavity and the mixing cylinder.

[0010] Optionally, the pressurization passage is provided with multiple baffle grooves at intervals along its extension direction.

[0011] Optionally, along the extension direction of the pressurization passage, the cross-sectional shape of the baffle groove is one or more of a semi-circular, toothed, or rectangular shape.

[0012] Optionally, the air intake passage includes a first passage and a second passage, one end of the first passage is configured as an air intake end, and the other end is connected to the pressure stabilizing chamber through the second passage, wherein the extension direction of the first passage and the extension direction of the second passage are set at an angle.

[0013] Optionally, the sealing structure of the mixer further includes a first sealing element, which is sandwiched between the rotating member and the mixer cylinder.

[0014] Optionally, the first seal is an O-ring.

[0015] Optionally, the sealing structure of the mixer further includes a second seal, which is sandwiched between the rotating member and the stationary member.

[0016] Optionally, a plurality of second seals are provided, and the plurality of second seals are spaced apart along the axial direction of the stationary member.

[0017] Optionally, the inner peripheral wall of the rotating component is provided with a mounting groove, and the second sealing component is embedded in the mounting groove.

[0018] Optionally, the second seal is a lip seal ring.

[0019] The beneficial effects of this utility model are:

[0020] This invention provides a sealing structure for a mixer, comprising a stationary component and a rotating component. The mixer cylinder is rotatably connected to the stationary component via the rotating component, which is fitted onto the outside of the stationary component to improve the fit between the stationary and rotating components, thereby enhancing the overall sealing performance. The stationary component has at least one air inlet passage. One end of the air inlet passage away from the mixer cylinder is the air inlet end, and the other end forms a pressure stabilizing chamber with the rotating component. This allows external gas to enter the pressure stabilizing chamber through the air inlet end, achieving pressure equalization and stabilization. Subsequently, the gas enters the interior of the mixer cylinder through the pressurization passage between the stationary and rotating components. The airflow forms a concentrated and high-strength airflow barrier in the pressurization passage, thereby improving the barrier effect and reducing the risk of powder leakage and material accumulation. Furthermore, along the axial direction of the stationary component, the distance between the two opposite sidewalls of the pressure stabilizing chamber is greater than the inner diameter of the air inlet passage. This allows for sufficient buffering and uniform distribution of the gas entering the pressure stabilizing chamber through the air inlet passage, preventing concentrated airflow and sudden pressure changes when gas is directly introduced into the pressurization passage due to the lack of buffer space. Through the above-mentioned configuration, the sealing structure of the mixer of this application can achieve pressure equalization and stabilization of airflow, improve the sealing effect, and reduce the risk of material leakage and accumulation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the mixer provided in an embodiment of the present utility model;

[0022] Figure 2 This is a cross-sectional view of the sealing structure of the mixer provided in this embodiment of the utility model;

[0023] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0024] Figure 4 This is a schematic diagram of the pressurization passage provided in an embodiment of the present invention.

[0025] In the picture:

[0026] 100. Mixer cylinder; 1. Stationary component; 11. Air inlet passage; 111. Air inlet end; 112. First passage; 113. Second passage; 12. Pressure stabilizing chamber; 13. Pressurizing passage; 131. Material retaining groove; 2. Rotating component; 21. Mounting groove; 3. First sealing component; 4. Second sealing component. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] In the field of powder material mixing and processing, drum mixers are widely used due to their high mixing efficiency. Their sealing structure is the core component for achieving zero powder leakage and ensuring the cleanliness of the mixed material.

[0032] However, the existing sealing structures of drum mixers have the following defects: First, most sealing structures only allow compressed gas to be directly introduced into the sealing area through a thin pipe, resulting in uneven airflow distribution and frequent airflow pressure fluctuations, making it difficult to achieve pressure equalization and stabilization. This leads to insufficient sealing barrier strength, poor sealing reliability, and a high risk of powder leakage. Second, the airflow cannot form a sufficiently strong isolation barrier after entering the sealing area, further exacerbating the problem of powder leakage. Third, some sealing structures use labyrinth-type components, but their complex labyrinth gaps easily trap powder, leading to significant material accumulation after long-term use. This not only damages the integrity of the sealing gaps, causing a gradual decline in sealing performance, but also increases the difficulty and maintenance cost of disassembling and cleaning the equipment.

[0033] Therefore, there is an urgent need for a sealing structure for the mixer to solve the above-mentioned technical problems.

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] like Figures 1-4As shown, this embodiment provides a sealing structure for a mixer, which includes a stationary component 1 and a rotating component 2. The stationary component 1 is provided with at least one air inlet passage 11. The mixer cylinder 100 is rotatably connected to the stationary component 1 via the rotating component 2. The rotating component 2 is sleeved on the outside of the stationary component 1. One end of the air inlet passage 11 away from the mixer cylinder 100 is the air inlet end 111, and the other end forms a pressure stabilizing cavity 12 between it and the rotating component 2. Along the axial direction of the stationary component 1, the distance between the two opposite side walls of the pressure stabilizing cavity 12 is greater than the inner diameter of the air inlet passage 11. A pressurizing passage 13 is formed between the stationary component 1 and the rotating component 2. The two ends of the pressurizing passage 13 are respectively connected to the pressure stabilizing cavity 12 and the interior of the mixer cylinder 100.

[0036] In this embodiment, the mixer cylinder 100 is rotatably connected to the stationary component 1 via a rotating component 2. The rotating component 2 is sleeved on the outside of the stationary component 1 to improve the fit between the stationary component 1 and the rotating component 2, which is beneficial to improving the overall sealing performance. The stationary component 1 is provided with at least one air inlet passage 11. One end of the air inlet passage 11 away from the mixer cylinder 100 is the air inlet end 111, and the other end forms a pressure stabilizing chamber 12 with the rotating component 2. This allows external gas to enter the pressure stabilizing chamber 12 through the air inlet end 111 to achieve pressure equalization and stabilization. Then, it enters the interior of the mixer cylinder 100 through the pressurization passage 13 between the stationary component 1 and the rotating component 2. The airflow forms a concentrated and high-intensity airflow barrier in the pressurization passage 13, thereby improving the isolation barrier effect and reducing the risk of powder leakage and material accumulation. Furthermore, along the axial direction of the stationary component 1, the distance between the two opposite sidewalls of the pressure stabilizing chamber 12 is greater than the inner diameter of the air inlet passage 11. This allows for sufficient buffering and uniform distribution of the gas entering the pressure stabilizing chamber 12 via the air inlet passage 11, preventing airflow concentration and sudden pressure changes when the gas is directly introduced into the pressurizing passage 13 due to the lack of buffer space. Through the above-mentioned configuration, the sealing structure of the mixer in this embodiment can achieve pressure equalization and stabilization of the airflow, improve the sealing effect, reduce the risk of material leakage and accumulation, and prevent contamination during powder mixing. Moreover, compared with the prior art, the sealing structure of the mixer in this embodiment, through its optimized structure, can shorten disassembly time, reduce maintenance difficulty, improve production efficiency, and improve the working environment.

[0037] It should be noted that the rotating component 2 can be rotatably connected to the stationary component 1 via bearing drive or sprocket drive. This ensures smooth rotation and high transmission efficiency between the rotating component 2 and the stationary component 1, 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.

[0038] The specific structure of the sealing structure of the mixer is described below:

[0039] Specifically, such as Figures 1-4As shown, the pressurization passage 13 is provided with multiple baffle grooves 131 at intervals along its extension direction, which can form multiple interceptions and buffers for the airflow in the pressurization passage 13, enhance the airflow barrier effect, and by setting baffle grooves 131, the powder seeping out of the mixer cylinder 100 during the mixing process can be intercepted, thereby improving the reliability of the airflow seal and the powder blocking effect.

[0040] More specifically, along the extension direction of the pressurization passage 13, the cross-sectional shape of the baffle groove 131 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.

[0041] More specifically, in this embodiment, the cross-sectional shape of the baffle groove 131 along the extension direction of the pressurization passage 13 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 obstruction in the baffle groove 131, which enhances the airflow retention, improves the gas sealing effect, and facilitates smooth airflow, preventing powder from accumulating in the baffle groove 131.

[0042] Specifically, the air intake passage 11 includes a first passage 112 and a second passage 113. One end of the first passage 112 is configured as an air intake end 111, and the other end is connected to the pressure stabilizing chamber 12 through the second passage 113. The extension direction of the first passage 112 and the extension direction of the second passage 113 are set at an angle. This setting can change the flow direction of the airflow, so that the airflow forms a certain buffer before entering the pressure stabilizing chamber 12, and avoids the airflow directly hitting the inner wall of the pressure stabilizing chamber 12 and causing pressure fluctuations.

[0043] More specifically, in this embodiment, the extending directions of the first passage 112 and the second passage 113 are perpendicular to each other, so that the airflow can be more evenly dispersed when it enters the pressure stabilizing chamber 12, further improving the pressure equalization effect of the pressure stabilizing chamber 12. In other embodiments, the extending directions of the first passage 112 and the second passage 113 are set at a 60° angle, which can also achieve the above-mentioned effect, and no further limitations are made here.

[0044] Specifically, the sealing structure of the mixer also includes a first sealing element 3, which is sandwiched between the rotating part 2 and the mixer cylinder 100, thereby filling the assembly gap between the rotating part 2 and the mixer cylinder 100, enhancing the sealing performance of the connection between the two, and preventing the powder in the mixer cylinder 100 from leaking.

[0045] Specifically, in this embodiment, the first sealing element 3 is an O-ring, which has good elasticity and strong sealing performance, and can tightly fit the contact surface between the rotating element 2 and the mixer cylinder 100. In other embodiments, the second sealing element 4 is a Y-ring or a rectangular sealing ring, which can also achieve the sealing effect between the rotating element 2 and the mixer cylinder 100, and is not further limited here.

[0046] Specifically, the sealing structure of the mixer also includes a second sealing element 4, which is sandwiched between the rotating element 2 and the stationary element 1, thereby filling the gap between the rotating element 2 and the stationary element 1 to improve the sealing effect between them, and can also assist in the air seal to improve the sealing performance of the overall structure.

[0047] Specifically, multiple second seals 4 are provided, and the multiple second seals 4 are spaced apart along the axial direction of the stationary member 1, thereby forming multiple sealing barriers to prevent leakage from the mixer cylinder 100.

[0048] More specifically, in this embodiment, two second seals 4 are provided, facing each other and spaced apart, thereby enhancing the sealing effect of the overall structure. In other embodiments, three or four second seals 4 are provided. The specific number of second seals 4 is not limited here, as long as the above-mentioned functions can be achieved.

[0049] Specifically, the inner circumferential wall of the rotating part 2 is provided with an installation groove 21, and the second seal 4 is embedded in the installation groove 21, thereby providing a stable installation position for the second seal 4 and preventing the second seal 4 from shifting or falling off during the rotation of the rotating part 2.

[0050] Specifically, in this embodiment, the second sealing element 4 is a lip seal ring, whose lip has good elasticity and can tightly fit the surface of the stationary element 1. When the rotating element 2 rotates at high speed, the lip seal ring can also maintain stable contact with the stationary element 1, thereby ensuring the reliability of the dynamic seal between the rotating element 2 and the stationary element 1. In other embodiments, the second 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 2 and the stationary element 1. No further limitations are made here.

[0051] It should be noted that the sealing structure of the mixer in this embodiment uses the second sealing element 4 to form a line contact seal with the stationary element 1, ensuring the reliability of the dynamic seal between the rotating element 2 and the stationary element 1. At the same time, compressed air is injected into the pressure stabilizing chamber 12 through the air inlet 111 to form a uniform pressure, and then passes through the pressurization passage 13 and several baffle grooves 131 to form an airflow isolation, thereby forming a double sealing structure to jointly prevent the powder inside the mixer cylinder 100 from flowing out.

[0052] 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 a mixer, characterized in that, include: The stationary component (1) is provided with at least one air intake passage (11); The rotating component (2) and the mixer cylinder (100) are rotatably connected to the stationary component (1) through the rotating component (2). The rotating component (2) is sleeved on the outside of the stationary component (1). The end of the air intake passage (11) away from the mixer cylinder (100) is the air intake end (111), and the other end forms a pressure stabilizing cavity (12) with the rotating component (2). Along the axial direction of the stationary component (1), the distance between the two opposite side walls of the pressure stabilizing cavity (12) is greater than the inner diameter of the air intake passage (11). A pressurizing passage (13) is formed between the stationary component (1) and the rotating component (2). The two ends of the pressurizing passage (13) are respectively connected to the pressure stabilizing cavity (12) and the interior of the mixer cylinder (100).

2. The sealing structure of the mixer according to claim 1, characterized in that, The pressurization passage (13) is provided with multiple baffle grooves (131) at intervals along its own extension direction.

3. The sealing structure of the mixer according to claim 2, characterized in that, Along the extension direction of the pressurization passage (13), the cross-sectional shape of the baffle groove (131) is one or more of the following: semi-circular, toothed, or rectangular.

4. The sealing structure of the mixer according to claim 1, characterized in that, The air intake passage (11) includes a first passage (112) and a second passage (113). One end of the first passage (112) is configured as an air intake end (111), and the other end is connected to the pressure stabilizing chamber (12) through the second passage (113). The extension direction of the first passage (112) and the extension direction of the second passage (113) are set at an angle.

5. The sealing structure of the mixer according to claim 1, characterized in that, The sealing structure of the mixer also includes a first sealing element (3), which is sandwiched between the rotating element (2) and the mixer cylinder (100).

6. The sealing structure of the mixer according to claim 5, characterized in that, The first sealing element (3) is an O-ring.

7. The sealing structure of the mixer according to any one of claims 1-6, characterized in that, The sealing structure of the mixer also includes a second sealing element (4), which is sandwiched between the rotating element (2) and the stationary element (1).

8. The sealing structure of the mixer according to claim 7, characterized in that, The second seal (4) is provided in multiple ways, and the multiple second seals (4) are spaced apart along the axial direction of the stationary member (1).

9. The sealing structure of the mixer according to claim 7, characterized in that, The inner circumferential wall of the rotating component (2) is provided with an installation groove (21), and the second sealing component (4) is embedded in the installation groove (21).

10. The sealing structure of the mixer according to claim 7, characterized in that, The second sealing element (4) is a lip seal ring.

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