Sealing joint structure of metal bidirectional housing

Abstract

The utility model relates to metal casing connecting structure technical field, concretely, it is sealed splicing structure of metal two -way casing, including first casing and second casing, first casing and second casing mutually close end portion all fixed mounting flange, and the fixed between two flanges is through a plurality of fastening bolts and nut, the side of two flanges mutually close is from inside to outside sequentially provided with first sealing groove, second sealing groove and outer annular groove, first sealing groove is inlayed with first sealing ring, second sealing groove is inlayed with second sealing ring, and outer annular groove is inlayed with elastic rubber ring, the side of two flanges mutually close all is provided with anticorrosive coating, the utility model discloses have the effect that multiple seals, and it is convenient to splice installation.

Description

Technical Field

[0001] This utility model relates to the field of metal shell connection structure technology, specifically to a sealed splicing structure for a two-way metal shell. Background Technology

[0002] In the fields of machinery manufacturing, chemical equipment, and pressure vessels, the splicing of metal shells is a common processing step, especially the splicing of bidirectional shells (such as cylindrical shells with open ends or tubular shells that are perpendicular to each other). Their sealing performance and connection strength directly affect the overall performance and safe operation of the equipment. The splicing of metal bidirectional shells must simultaneously meet the requirements of structural stability and media sealing to prevent internal fluid leakage or external impurities from entering.

[0003] Currently, existing metal bidirectional shell splicing structures have many shortcomings. For example, while traditional welding splicing methods offer high connection strength, the process is complex, prone to welding stress leading to shell deformation, and difficult to disassemble for later maintenance, hindering reuse. Flange connections, as a commonly used detachable splicing method, are mostly unidirectional and single-layer sealing designs. Once this sealing structure is damaged, leakage is likely to occur, affecting the performance. Therefore, we propose a sealed splicing structure for metal bidirectional shells. Utility Model Content

[0004] The purpose of this invention is to provide a sealed splicing structure for a metal bidirectional shell to solve the defects mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: The sealed splicing structure of the metal bidirectional shell includes a first shell and a second shell. Flanges are fixedly installed at the ends of the first shell and the second shell that are close to each other. The two flanges are fixed together by a plurality of fastening bolts and nuts. The sides of the two flanges that are close to each other are provided with a first sealing groove, a second sealing groove and an outer annular groove from the inside to the outside. A first sealing ring is embedded in the first sealing groove, a second sealing ring is embedded in the second sealing groove, and an elastic rubber ring is embedded in the outer annular groove.

[0006] Preferably, the outer annular groove is connected to the second sealing groove, and the elastic rubber ring presses against the second sealing ring from the outside to the inside; This setting ensures that the second sealing ring is compressed, improving the sealing effect.

[0007] Preferably, the flange has a plurality of bolt holes arranged in a ring at equal intervals, and the fastening bolts pass through the bolt holes.

[0008] Preferably, the bolt head of the fastening bolt abuts against the side of one of the flanges, and the nut abuts against the side of the other flange; Preferably, the fastening bolt is fitted with an anti-loosening washer, and the nut presses the anti-loosening washer tightly; The above two settings ensure that the use of fastening bolts can prevent loosening while guaranteeing a tight fit.

[0009] Preferably, an anti-corrosion coating is provided on the sides of the two flanges that are close to each other, and the thickness of the anti-corrosion coating is between 0.2mm and 0.6mm. The anti-corrosion coating provided by this feature can effectively prevent corrosion.

[0010] Preferably, one of the flanges has a plurality of positioning protrusions fixedly installed on its side in a ring and at equal intervals, and the other flange has a plurality of positioning slots on its side, wherein the positioning protrusions are located in the positioning slots and are inserted into the positioning slots. This setting enables precise installation, ensuring accurate splicing and preventing misalignment.

[0011] Preferably, the size of the first sealing ring is adapted to the size of the first sealing groove, the size of the second sealing ring is adapted to the size of the second sealing groove, the cross-section of the elastic rubber ring is hexagonal, and one side lip of the elastic rubber ring abuts against the second sealing ring.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model replaces traditional welding by using a flange with fastening bolts and nuts for connection, realizing the detachable splicing of the first and second shells, avoiding shell deformation caused by welding stress, and facilitating later maintenance and reuse, thereby improving structural flexibility and maintenance convenience.

[0013] 2. This utility model forms a double sealing structure by setting a first sealing groove, a second sealing groove, and an outer annular groove on the flange, and embedding a first sealing ring, a second sealing ring, and an elastic rubber ring. The elastic rubber ring presses against the second sealing ring to enhance the sealing effect, which solves the problem of easy leakage of traditional single-layer flange sealing and achieves the effect of improving sealing reliability.

[0014] 3. This utility model ensures precise alignment when two flanges are spliced ​​by the insertion and cooperation of the positioning protrusion and the positioning slot. The anti-loosening washer prevents the fastening bolts from loosening, and the anti-corrosion coating enhances corrosion resistance. Together, they ensure the stability and durability of the spliced ​​structure, thereby improving installation accuracy and extending service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the structure of the flange of this utility model; The meanings of the labels in the diagram are as follows: 1. First housing; 10. Second housing; 11. Flange; 12. Bolt hole; 13. First sealing groove; 131. First sealing ring; 14. Second sealing groove; 141. Second sealing ring; 15. Outer annular groove; 151. Elastic rubber ring; 16. Positioning protrusion; 17. Positioning slot; 2. Fastening bolts; 20. Bolt caps; 21. Anti-loosening washers; 22. Nuts; 3. Anti-corrosion coating. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-3 This utility model provides a technical solution: a sealed splicing structure of a metal bidirectional shell, including a first shell 1 and a second shell 10. Flanges 11 are fixedly installed at the close ends of the first shell 1 and the second shell 10. The two flanges 11 are fixed together by multiple fastening bolts 2 and nuts 22, so that the two shells can be detachably connected, replacing the traditional welding method, avoiding deformation caused by welding stress, and facilitating disassembly, maintenance and reuse in the later stage, thus improving the flexibility of the structure.

[0018] In this embodiment, the two flanges 11 are provided with a first sealing groove 13, a second sealing groove 14 and an outer annular groove 15 on their sides from the inside to the outside. A first sealing ring 131 is embedded in the first sealing groove 13, a second sealing ring 141 is embedded in the second sealing groove 14, and an elastic rubber ring 151 is embedded in the outer annular groove 15, forming a multiple seal. The elastic rubber ring 151 presses against the second sealing ring 141, further enhancing the sealing performance and effectively preventing fluid leakage.

[0019] like Figure 2As shown, the outer annular groove 15 is connected to the second sealing groove 14. The elastic rubber ring 151 presses against the second sealing ring 141 from the outside to the inside, so that the elastic rubber ring 151 can continuously press against the second sealing ring 141 from the outside to the inside, ensuring that the second sealing ring 141 is always in close contact with the sealing surface, thereby improving the reliability and durability of the seal.

[0020] Specifically, the flange 11 is provided with multiple bolt holes 12 arranged in a ring at equal intervals. The fastening bolts 2 pass through the bolt holes 12, so that the fastening bolts 2 are subjected to uniform force, ensuring that the two flanges 11 are firmly connected and avoiding sealing failure caused by uneven force.

[0021] Furthermore, the bolt head 20 of the fastening bolt 2 rests against the side of one of the flanges 11, and the nut 22 rests against the side of the other flange 11. An anti-loosening washer 21 is fitted on the fastening bolt 2, and the nut 22 presses the anti-loosening washer 21 tightly. With the anti-loosening washer 21 being pressed by the nut 22, the fastening bolt 2 is effectively prevented from loosening, ensuring the stability of the spliced ​​structure.

[0022] In addition, the two flanges 11 are provided with anti-corrosion coating 3 on their adjacent sides. The thickness of the anti-corrosion coating 3 is between 0.2mm and 0.6mm, which can effectively block corrosive media, protect the flanges 11 from corrosion, and extend the service life of the spliced ​​structure.

[0023] It is worth noting that one of the flanges 11 has multiple positioning protrusions 16 arranged in a ring at equal intervals fixedly installed on its side, and the other flange 11 has multiple positioning slots 17 on its side. The positioning protrusions 16 are located in the positioning slots 17 and are inserted into the positioning slots 17, so that the two flanges 11 are precisely aligned when spliced, avoiding misalignment and ensuring the correct installation and sealing effect of the seal.

[0024] It is worth noting that the size of the first sealing ring 131 is adapted to the size of the first sealing groove 13, the size of the second sealing ring 141 is adapted to the size of the second sealing groove 14, and the cross-section of the elastic rubber ring 151 is hexagonal. One side lip of the elastic rubber ring 151 abuts against the second sealing ring 141 to ensure that each sealing element fits tightly, thereby enhancing the stability and reliability of the seal.

[0025] When using the sealing and splicing structure of the metal bidirectional shell of this utility model, first install sealing elements on the flanges 11 of the first shell 1 and the second shell 10 respectively: embed the first sealing ring 131 into the first sealing groove 13, embed the second sealing ring 141 into the second sealing groove 14, and embed the elastic rubber ring 151 into the outer annular groove 15. Align the two flanges 11, insert the positioning protrusion 16 into the positioning slot 17 to complete the precise alignment, pass the fastening bolt 2 through the bolt hole 12, put on the anti-loosening washer 21 and then tighten the nut 22, gradually tighten it so that the two flanges 11 fit together. At this time, the elastic rubber ring 151 presses against the second sealing ring 141 to form a multiple seal. After assembly, the anti-corrosion coating 3 will provide corrosion protection. If disassembly is required, simply loosen the nuts 22 and bolts 2 to separate the two flanges 11, which will facilitate maintenance or replacement of parts.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sealed splicing structure of a metal bidirectional shell, comprising a first shell (1) and a second shell (10), characterized in that: Flanges (11) are fixedly installed at the ends of the first housing (1) and the second housing (10) that are close to each other. The two flanges (11) are fixed together by a plurality of fastening bolts (2) and nuts (22). The two flanges (11) are provided with a first sealing groove (13), a second sealing groove (14) and an outer annular groove (15) from the inside to the outside. A first sealing ring (131) is embedded in the first sealing groove (13), a second sealing ring (141) is embedded in the second sealing groove (14), and an elastic rubber ring (151) is embedded in the outer annular groove (15).

2. The sealed splicing structure of the metal bidirectional shell according to claim 1, characterized in that: The outer annular groove (15) is connected to the second sealing groove (14), and the elastic rubber ring (151) presses against the second sealing ring (141) from the outside to the inside.

3. The sealed splicing structure of the metal bidirectional shell according to claim 1, characterized in that: The flange (11) has a plurality of bolt holes (12) arranged in a ring at equal intervals, and the fastening bolts (2) pass through the bolt holes (12).

4. The sealed splicing structure of the metal bidirectional shell according to claim 1, characterized in that: The bolt head (20) of the fastening bolt (2) rests against the side of one of the flanges (11), and the nut (22) rests against the side of the other flange (11).

5. The sealed splicing structure of the metal bidirectional shell according to claim 1, characterized in that: The fastening bolt (2) is fitted with an anti-loosening washer (21), and the nut (22) presses the anti-loosening washer (21) tight.

6. The sealed splicing structure of the metal bidirectional shell according to claim 1, characterized in that: The two flanges (11) are provided with anti-corrosion coatings (3) on their adjacent sides, and the thickness of the anti-corrosion coatings (3) is between 0.2 mm and 0.6 mm.

7. The sealed splicing structure of the metal bidirectional shell according to claim 1, characterized in that: One of the flanges (11) has a plurality of positioning protrusions (16) arranged in a ring at equal intervals fixedly installed on its side, and the other flange (11) has a plurality of positioning slots (17) provided on its side. The positioning protrusions (16) are located in the positioning slots (17) and are inserted into the positioning slots (17).

8. The sealed splicing structure of the metal bidirectional shell according to claim 1, characterized in that: The size of the first sealing ring (131) is adapted to the size of the first sealing groove (13), the size of the second sealing ring (141) is adapted to the size of the second sealing groove (14), the cross-section of the elastic rubber ring (151) is hexagonal, and one side lip of the elastic rubber ring (151) abuts against the second sealing ring (141).

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