Sealing device between tower sections of vacuum rectifying tower

Abstract

The utility model discloses a sealing device between tower sections of a reduced pressure rectifying tower, which comprises a base, an upper seat and a sealing component, an annular groove is arranged on the top surface of the base, an annular convex groove is arranged on the bottom surface of the upper seat, and the annular convex groove is correspondingly embedded with the annular groove; the sealing assembly is arranged in the annular groove and comprises a graphite gasket, an elastic pressing piece and an auxiliary sealing ring, the graphite gasket is vertically placed in the annular groove, the elastic pressing piece is arranged on the outer side of the graphite gasket and makes close contact with the graphite gasket, and the elastic pressing piece comprises a plurality of arc-shaped pressing pieces and connecting springs. The arc-shaped pressing pieces are evenly distributed on the outer wall of the graphite gasket and attached to the outer wall of the graphite gasket, the two ends of the connecting spring are welded to the ends of the two adjacent arc-shaped pressing pieces respectively, the elastic pressing piece is sleeved with the auxiliary sealing ring, and the auxiliary sealing ring is tightly attached to the elastic pressing piece. The graphite gasket is kept in a tight state, and the sealing performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of distillation column sealing technology, specifically a sealing device between sections of a vacuum distillation column. Background Technology

[0002] A vacuum distillation column is a distillation device that operates under vacuum conditions and is mainly used to separate heat-sensitive or high-boiling-point mixtures.

[0003] Vacuum distillation columns are typically composed of a top section, a bottom section, and multiple intermediate sections. Preventing leaks, especially under reduced pressure, is a major technical challenge in such multi-section distillation columns. Utility Model Content

[0004] The purpose of this invention is to provide a sealing device between sections of a vacuum distillation column to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing device for inter-section sections of a vacuum distillation column, comprising a base, an upper seat, and a sealing assembly. The top surface of the base has an annular groove, and the bottom surface of the upper seat has an annular protrusion, the annular protrusion and the annular groove correspondingly fitting together. The sealing assembly is disposed inside the annular groove, and includes a graphite gasket, an elastic clamping element, and an auxiliary sealing ring. The graphite gasket is vertically placed within the annular groove, and the elastic clamping element is disposed outside the graphite gasket and in close contact with it. The elastic clamping element includes several arc-shaped pressure plates and a connecting spring. The arc-shaped pressure plates are evenly distributed on the outer wall of the graphite gasket and fit against it. Adjacent arc-shaped pressure plates are fixedly connected by connecting springs. The two ends of the connecting springs are respectively welded to the ends of the two adjacent arc-shaped pressure plates. The auxiliary sealing ring is sleeved on the outside of the elastic clamping member and fits tightly against it. The auxiliary sealing ring includes an inner ring body and an outer ring body. The inner ring body and the outer ring body are fixedly connected by several support columns. The support columns are evenly distributed along the circumference of the inner ring body and the outer ring body. The inner wall of the inner ring body is in close contact with the outer wall of the arc-shaped pressure plate, and the outer wall of the outer ring body is in close contact with the inner wall of the annular groove.

[0006] Preferably, the auxiliary sealing ring has a sealing flange at the top, which extends to the bottom of the annular groove and is in close contact with the bottom surface of the annular groove. The top surface of the sealing flange has a plurality of micro sealing grooves, which are evenly distributed along the circumference of the sealing flange. The micro sealing grooves are filled with a flexible sealing material, which is polytetrafluoroethylene.

[0007] Preferably, the top surface of the base is provided with an annular sealing groove outside the annular groove, and a sealing ring is provided inside the annular sealing groove. The sealing ring is an O-ring rubber sealing ring, and the top surface of the sealing ring is in close contact with the bottom surface of the upper base.

[0008] Preferably, the top surface of the base is provided with a flow guide groove located inside the annular groove. The flow guide groove has a spiral structure, and the bottom of the flow guide groove is provided with a plurality of exhaust holes, which penetrate the base and communicate with the outside.

[0009] Preferably, the inner wall of the arc-shaped pressure plate is provided with a plurality of protrusions, which are evenly distributed along the length direction of the arc-shaped pressure plate and are in close contact with the outer wall of the graphite pad.

[0010] Preferably, the annular groove is 6mm to 7mm wide, the annular protrusion is 5mm wide and 5mm high, and the graphite gasket is 7mm to 8mm thick.

[0011] Preferably, the guide groove pitch is 5mm to 8mm, the guide groove depth is 2mm to 3mm, and the exhaust hole diameter is 1mm to 2mm.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. By using the elastic clamping element and the auxiliary sealing ring together, radial and axial pressure is applied to the graphite gasket, keeping the graphite gasket in a tight state, improving the sealing performance, and effectively preventing gas leakage under depressurization conditions;

[0014] 2. The micro-sealing groove on the top surface of the sealing flange is filled with flexible sealing material. The flexible sealing material contacts the bottom surface of the annular groove to form the first sealing barrier. Combined with the sealing ring inside the annular sealing groove, a double sealing structure is formed, which enhances the sealing effect and reduces the risk of leakage.

[0015] 3. The design of the guide groove and vent hole can guide and discharge the leaked gas in a timely manner, avoid the accumulation of leaked gas inside the sealing device, reduce the impact of leaked gas on the sealing device, and extend the service life of the sealing device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an overall schematic diagram of a sealing device between sections of a vacuum distillation column according to this embodiment;

[0018] Figure 2 This is a schematic diagram of a graphite gasket in a sealing device between sections of a vacuum distillation column according to this embodiment;

[0019] Figure 3 This is a schematic diagram of the auxiliary sealing ring in a sealing device between sections of a vacuum distillation column according to this embodiment;

[0020] Figure 4 This is a schematic diagram of the annular sealing groove in a sealing device between sections of a vacuum distillation column according to this embodiment;

[0021] Figure 5 This is a schematic diagram of the guide groove in the sealing device between the sections of a vacuum distillation column according to this embodiment;

[0022] Figure 6 This is a schematic diagram of the inner wall of the arc-shaped pressure plate in a sealing device between sections of a vacuum distillation column according to this embodiment;

[0023] Figure 7 This is a schematic diagram of the connection between the inner and outer rings in a sealing device between sections of a vacuum distillation column according to this embodiment.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Base; 2. Upper seat; 3. Graphite gasket; 4. Sealing assembly; 5. Annular groove; 6. Annular protrusion; 7. Elastic clamping element; 8. Auxiliary sealing ring; 9. Arc-shaped pressure plate; 10. Connecting spring; 11. Inner ring body; 12. Outer ring body; 13. Support column; 14. Sealing flange; 15. Miniature sealing groove; 16. Annular sealing groove; 17. Sealing ring; 18. Guide groove; 19. Exhaust hole; 20. Protrusion. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-7This utility model provides a technical solution: a sealing device for the inter-section of a vacuum distillation column, comprising a base 1, an upper seat 2, and a sealing assembly 4. The top surface of the base 1 has an annular groove 5, and the bottom surface of the upper seat 2 has an annular protrusion 6, which corresponds to and fits into the annular groove 5. The sealing assembly 4 is disposed inside the annular groove 5 and includes a graphite gasket 3, an elastic clamping element 7, and an auxiliary sealing ring 8. The graphite gasket 3 is vertically placed inside the annular groove 5, and the elastic clamping element 7 is disposed outside the graphite gasket 3 and in close contact with it. The elastic clamping element 7 includes several arc-shaped pressure plates 9 and connecting springs 10. The arc-shaped pressure plates 9 are uniformly spaced... The graphite gasket 3 is distributed on the outer wall and fits against it. Two adjacent arc-shaped pressure plates 9 are fixedly connected by a connecting spring 10. The two ends of the connecting spring 10 are respectively welded to the ends of the two adjacent arc-shaped pressure plates 9. The auxiliary sealing ring 8 is sleeved on the outside of the elastic pressing member 7 and fits tightly against it. The auxiliary sealing ring 8 includes an inner ring body 11 and an outer ring body 12. The inner ring body 11 and the outer ring body 12 are fixedly connected by several support columns 13. The support columns 13 are evenly distributed along the circumference of the inner ring body 11 and the outer ring body 12. The inner wall of the inner ring body 11 is in close contact with the outer wall of the arc-shaped pressure plate 9, and the outer wall of the outer ring body 12 is in close contact with the inner wall of the annular groove 5.

[0028] Specifically, the auxiliary sealing ring 8 has a sealing flange 14 at its top, which extends to the bottom of the annular groove 6 and is in close contact with the bottom surface of the annular groove 6. The top surface of the sealing flange 14 has several micro-sealing grooves 15, which are evenly distributed along the circumference of the sealing flange 14. Each micro-sealing groove 15 is filled with a flexible sealing material made of polytetrafluoroethylene (PTFE). This arrangement allows the flexible sealing material to fill the tiny gaps between the micro-sealing grooves 15 and the bottom surface of the annular groove 6 when the sealing device is under pressure, further enhancing the sealing effect and preventing gas or liquid leakage. Simultaneously, the design of the elastic clamping element 7 ensures that the graphite gasket 3 is evenly stressed under pressure, maintaining a stable sealing state.

[0029] Specifically, an annular sealing groove 16 is provided on the top surface of the base 1 and outside the annular groove 5. A sealing ring 17 is provided inside the annular sealing groove 16. The sealing ring 17 is an O-ring rubber sealing ring 17. The top surface of the sealing ring 17 is in close contact with the bottom surface of the upper seat 2. Through the above arrangement, a good sealing effect can be formed between the upper seat 2 and the base 1 outside the annular groove 5, which further improves the sealing performance of the entire sealing device. The O-ring rubber sealing ring 17 has good elasticity and wear resistance, and can adapt to the sealing requirements under different temperature and pressure environments, ensuring the stability and safety of the sections of the vacuum distillation column.

[0030] Specifically, a guide channel 18 is provided on the top surface of the base 1 and inside the annular groove 5. The guide channel 18 has a spiral structure and several exhaust holes 19 are provided at the bottom of the guide channel 18. The exhaust holes 19 penetrate the base 1 and communicate with the outside. Through the above arrangement, the gas or liquid generated between the column sections during the vacuum distillation process can flow along the guide channel 18 and finally be discharged through the exhaust holes 19, avoiding the accumulation of gas or liquid between the column sections and ensuring the smooth progress of the vacuum distillation process. The spiral structure of the guide channel 18 can increase the flow path of gas or liquid and prolong its residence time between the column sections, which is conducive to further improving the effect of vacuum distillation.

[0031] Specifically, the inner wall of the arc-shaped pressure plate 9 is provided with several protrusions 20, which are evenly distributed along the length of the arc-shaped pressure plate 9. The protrusions 20 are in close contact with the outer wall of the graphite gasket 3. This design can increase the friction between the arc-shaped pressure plate 9 and the graphite gasket 3, and prevent the graphite gasket 3 from slipping or loosening when subjected to pressure, thereby ensuring that the graphite gasket 3 can always maintain a stable sealing state.

[0032] Specifically, the annular groove 5 is 6mm to 7mm wide, the annular protrusion 6 is 5mm wide and 5mm high, the graphite gasket 3 is 7mm to 8mm thick, the guide groove 18 has a pitch of 5mm to 8mm, the guide groove 18 has a depth of 2mm to 3mm, and the exhaust hole 19 has a diameter of 1mm to 2mm. Through the above settings, the dimensions of each component of the sealing device are more reasonable, and they can be adapted to each other and fit tightly, ensuring the stability and reliability of the sealing device. These dimensions can also meet the usage requirements of the vacuum distillation column under different operating conditions, improving the overall performance and efficiency of the vacuum distillation column.

[0033] A specific application example of this embodiment is as follows:

[0034] In use, a graphite gasket 3 is installed inside the annular groove 5 of the base 1 as the main sealing element. An elastic clamping element 7 is installed outside the graphite gasket 3. The arc-shaped pressure plates 9 in the elastic clamping element 7 are connected to each other by a connecting spring 10 to form a whole. Under the action of the connecting spring 10, the arc-shaped pressure plates 9 apply radial pressure to the graphite gasket 3 to keep the graphite gasket 3 in a tight state. An auxiliary sealing ring 8 is sleeved on the outside of the elastic clamping element 7. The inner ring 11 of the auxiliary sealing ring 8 contacts the outer wall of the arc-shaped pressure plate 9, and the outer ring 12 contacts the inner wall of the annular groove 5. The sealing flange 14 at the top of the auxiliary sealing ring 8 extends to the bottom of the annular groove 6. The micro sealing groove 15 on the top surface of the sealing flange 14 is filled with flexible sealing material. The flexible sealing material contacts the bottom surface of the annular groove 6 to form the first sealing barrier. A sealing ring 17 is provided inside the annular sealing groove 16 outside the annular groove 5. The sealing ring 17 contacts the bottom surface of the upper seat 2 to form the second sealing barrier. The guide groove 18 on the inner side of the top surface of the base 1 is used to guide the leaked gas. The exhaust hole 19 at the bottom of the guide groove 18 is used to discharge the leaked gas.

[0035] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the drawings, and 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.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", 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 connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that modifications may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing device between sections of a vacuum distillation column, characterized in that: The utility model provides a sealing assembly for the sealing of the upper seat (2) and the base (1), the sealing assembly (4) is arranged in the annular recess (5), the sealing assembly (4) includes graphite gasket (3), elastic compression part (7) and auxiliary sealing ring (8), the graphite gasket (3) is placed in annular recess (5) vertically, the elastic compression part (7) is set up in graphite gasket (3) outside and is closely contacted with it, the elastic compression part (7) includes a plurality of arc pressing piece (9) and connecting spring (10), the arc pressing piece (9) evenly distributes in graphite gasket (3) outer wall and is attached to it, adjacent two arc pressing piece (9) are fixedly connected through connecting spring (10) between the arc pressing piece (9), the both ends of connecting spring (10) are welded in the end of adjacent two arc pressing piece (9), the auxiliary sealing ring (8) is set up in elastic compression part (7) outside and is closely attached to it, the auxiliary sealing ring (8) includes inner ring body (11) and outer ring body (12), the inner ring body (11) is fixedly connected with outer ring body (12) through a plurality of support column (13), the support column (13) evenly distributes along the circumference direction of inner ring body (11) and outer ring body (12), the inner ring body (11) inner wall is closely contacted with arc pressing piece (9) outer wall, and the outer ring body (12) outer wall is closely attached to annular recess (5) inner wall.

2. A seal assembly for use between trays of a vacuum distillation column as defined in claim 1, wherein: The auxiliary sealing ring (8) top is equipped with sealing flange (14), and the sealing flange (14) extends to the bottom of the annular convex groove (6) and is closely contacted with the bottom surface of the annular convex groove (6). The top surface of the sealing flange (14) is provided with a plurality of micro sealing grooves (15). The micro sealing grooves (15) are evenly distributed along the circumferential direction of the sealing flange (14). The micro sealing grooves (15) are filled with a flexible sealing material. The flexible sealing material is made of polytetrafluoroethylene.

3. A seal assembly for use between trays of a vacuum distillation column as defined in claim 1, wherein: The top surface of the base (1) and located outside the annular recess (5) is provided with an annular sealing groove (16). The annular sealing groove (16) is internally provided with a sealing ring (17). The sealing ring (17) is an O-shaped rubber sealing ring (17). The top surface of the sealing ring (17) is closely contacted with the bottom surface of the upper seat (2).

4. A seal assembly for use between trays of a vacuum distillation column as defined in claim 1, wherein: The top surface of the base (1) and located inside the annular recess (5) is provided with a flow guide groove (18). The flow guide groove (18) has a spiral structure. The bottom of the flow guide groove (18) is provided with a plurality of exhaust holes (19). The exhaust holes (19) penetrate through the base (1) and are communicated with the outside.

5. A seal assembly for use between trays of a vacuum distillation column as defined in claim 1, wherein: The inner wall of the arc pressing piece (9) is provided with a plurality of protrusions (20). The protrusions (20) are evenly distributed along the length direction of the arc pressing piece (9). The protrusions (20) are closely contacted with the outer wall of the graphite gasket (3).

6. A seal for the interstage of a pressure reduction distillation column as defined in claim 1, wherein: The width of the annular recess (5) is 6mm to 7mm. The annular convex groove (6) has a width of 5mm and a height of 5mm. The thickness of the graphite gasket (3) is 7mm to 8mm.

7. A seal for the interstage of a pressure reduction distillation column as defined in claim 4, wherein: The pitch of the flow guide groove (18) is 5mm to 8mm, the depth of the flow guide groove (18) is 2mm to 3mm, and the diameter of the exhaust hole (19) is 1mm to 2mm.

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