A sealing structure

Abstract

The utility model discloses a sealing structure, including the body, the body center is equipped with the axle hole, the axle hole is used for the main shaft of wearing, the axle hole top is equipped with the mounting groove, be equipped with a plurality of tetrafluoro lip seal in the mounting groove, the tetrafluoro lip seal includes the framework and the inner ring, the framework is circular ring shape, the inner ring sets up in the inside of framework, the inner side of inner ring is equipped with a plurality of lip edge, the sealing structure of the utility model adopts a plurality of tetrafluoro lip seal to the gap between sealing main shaft and body, simple structure, convenient installation, and the lip edge of tetrafluoro lip seal has the elasticity, has the self -compensation ability after wearing, therefore can always contact with the main shaft, need not regular maintenance and the service life is longer than the filler seal.

Description

Technical Field

[0001] This utility model relates to agitator technology, specifically a sealing structure. Background Technology

[0002] Mixing equipment has been widely used in many industries. The agitator is the main component of the mixing equipment. However, the sealing structure of the agitator is generally a traditional packing seal, which is used under normal pressure or slightly positive pressure conditions. However, after the packing wears down, there will be a gap between the packing and the main shaft, which will cause gas or material leakage in the vessel. It is necessary to tighten the packing with bolts periodically so that the packing fills the gap and ensures the sealing performance. Utility Model Content

[0003] To address the shortcomings of the prior art, this invention provides a sealing structure in which the PTFE lip seal has elasticity and self-compensation capability after wear, thus ensuring constant contact with the spindle, eliminating the need for regular maintenance, and offering a longer service life than packing seals.

[0004] To achieve the above technical objectives, the present invention adopts the following technical solution: a sealing structure, including a body, a shaft hole at the center of the body for inserting a main shaft, a mounting groove at the top of the shaft hole, and a plurality of PTFE lip seals in the mounting groove. The PTFE lip seal includes a skeleton and an inner ring, the skeleton is circular, the inner ring is located inside the skeleton, and the inner ring has a plurality of lips on its inner side.

[0005] Preferably, the bottom of the body is provided with a flange plate, and the flange plate is provided with a plurality of fixing holes evenly distributed around its circumference.

[0006] Preferably, a gasket is provided below the flange plate.

[0007] Preferably, the inner diameter of the shaft hole is larger than the diameter of the main shaft.

[0008] Preferably, the frame includes a back plate, a bottom plate, and a top plate, with the top plate disposed above the back plate and the bottom plate disposed below the back plate. The bottom plate, back plate, and top plate cooperate to form a mounting cavity, which is used to accommodate the inner ring.

[0009] Preferably, the bottom plate, top plate, and back plate are all annular, and the inner diameter of the bottom plate is larger than the inner diameter of the top plate.

[0010] Preferably, there are two lips, one of which is fixed to the inner ring on the side away from the main shaft, and the other of which is turned upwards on the side facing the main shaft and fits against the outer wall of the main shaft.

[0011] In summary, this utility model achieves the following technical effects: The sealing structure of this utility model uses multiple PTFE lip seals to seal the gap between the spindle and the body. The structure is simple and easy to install. Moreover, the PTFE lip seals have elasticity and self-compensation ability after wear, so they can always be in contact with the spindle. They do not require regular maintenance and have a longer service life than packing seals. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the assembly state of the sealing structure of this utility model; Figure 2 This is a schematic diagram of the PTFE lip seal of the sealing structure of this utility model; Instruction manual drawing reference numerals: 1. Body; 2. Flange plate; 3. Gasket; 4. Fixing hole; 5. Mounting groove; 6. PTFE lip seal; 61. Back plate; 62. Top plate; 63. Bottom plate; 64. Inner ring; 65. Lip edge; 7. Spindle. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings.

[0014] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "main axis", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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 according to the specific circumstances.

[0018] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0019] Example 1: like Figure 1 As shown, a sealing structure includes a body 1, with a shaft hole at its center for a main shaft 7 to pass through. A mounting groove 5 is provided at the top of the shaft hole, and a plurality of PTFE lip seals 6 are provided within the mounting groove 5. Figure 2 As shown, the PTFE lip seal 6 includes a skeleton and an inner ring 64. The skeleton is circular, and the inner ring 64 is disposed inside the skeleton. The inner ring 64 has a plurality of lips 65 on its inner side.

[0020] The sealing structure of this embodiment uses multiple PTFE lip seals 6 to seal the gap between the main shaft 7 and the body 1. The structure is simple and easy to install. Moreover, the lip edge 65 of the PTFE lip seal 6 has elasticity and self-compensation ability after wear. Therefore, it can always be in contact with the main shaft 7, requiring no regular maintenance and having a longer service life than packing seals.

[0021] The bottom of the body 1 is provided with a flange plate 2, and the flange plate 2 is provided with a plurality of fixing holes 4 evenly distributed around its circumference; the flange plate 2 can be used to fix the body 1 to the top of the vessel.

[0022] A gasket 3 is provided below the flange plate 2; the gasket 3 can fill the gap between the body 1 and the vessel body, and improve the sealing effect between the body 1 and the vessel body.

[0023] The inner diameter of the shaft hole is larger than the diameter of the main shaft 7.

[0024] The frame includes a back plate 61, a bottom plate 64, and a top plate 62. The top plate 62 is disposed above the back plate 61, and the bottom plate 64 is disposed below the back plate 61. The bottom plate 64, the back plate 61, and the top plate 62 cooperate to form a mounting cavity, which is used to accommodate the inner ring 64.

[0025] The base plate 64, top plate 62 and back plate 61 are all annular, and the inner diameter of the base plate 64 is larger than the inner diameter of the top plate 62. This design makes it easier for installers to identify the front and back, and avoids damage to the lip 65 caused by improper installation of the PTFE lip seal 6.

[0026] There are two lips 65. The side of the lip 65 away from the main shaft 7 is fixed to the inner ring 64. The side of the lip 65 facing the main shaft 7 is turned up and fits against the outer wall of the main shaft 7.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A sealing structure, characterized in that, The device includes a body, with a shaft hole at the center for inserting a main shaft. The top of the shaft hole has a mounting groove, and the mounting groove contains a plurality of PTFE lip seals. Each PTFE lip seal includes a skeleton and an inner ring. The skeleton is annular, and the inner ring is located inside the skeleton. The inner ring has a plurality of lips on its inner side.

2. The sealing structure according to claim 1, characterized in that, The bottom of the body is provided with a flange plate, and the flange plate is provided with a number of fixing holes evenly distributed around its circumference.

3. The sealing structure according to claim 2, characterized in that, A gasket is provided below the flange plate.

4. A sealing structure according to claim 1, characterized in that, The inner diameter of the shaft hole is larger than the diameter of the main shaft.

5. A sealing structure according to claim 1, characterized in that, The frame includes a back plate, a bottom plate, and a top plate. The top plate is disposed above the back plate, and the bottom plate is disposed below the back plate. The bottom plate, back plate, and top plate cooperate to form a mounting cavity, which is used to accommodate the inner ring.

6. A sealing structure according to claim 5, characterized in that, The bottom plate, top plate, and back plate are all annular, and the inner diameter of the bottom plate is larger than the inner diameter of the top plate.

7. A sealing structure according to claim 5, characterized in that, There are two lips. The side of the lip away from the main shaft is fixed to the inner ring, and the side of the lip facing the main shaft is turned up and fits against the outer wall of the main shaft.

Images