Metal expansion joint with multiple connection modes

Abstract

The utility model relates to the technical field of metal expansion joints, and discloses a metal expansion joint with multiple connection modes, which comprises a metal corrugated pipe and two groups of fixing components, and flange plates are fixedly connected to the outer walls of the upper side and the lower side of the metal corrugated pipe. According to the metal expansion joint, the screw penetrates through the flange hole of the connecting pipeline, and then the nut II is rotated for screwing and fixing, so that the metal expansion joint can be mounted, and the metal expansion joint is suitable for the condition that the flange hole in the flange plate corresponds to the flange hole of the flange of the connecting pipeline in position; the flange plate and a pipeline flange needing to be connected are placed between the first fixing plate and the second fixing plate, then the third nut is rotated to enable the first fixing plate and the second fixing plate to be tightly attached to and extruded with the flange plate and the pipeline flange, and then installation of the metal expansion joint can be completed. The metal expansion joint is suitable for the situation that the flange holes in the flange plates do not correspond to the flange holes of the pipeline flanges needing to be connected in position, and the metal expansion joint has multiple connection modes and is flexible in installation and connection mode.

Description

Technical Field

[0001] The utility model relates to the technical field of metal expansion joints, in particular to a metal expansion joint with multiple connection methods. Background Technique

[0002] A metal expansion joint is a flexible structure provided on a container shell or pipeline to compensate for additional stresses caused by temperature differences and mechanical vibrations; due to its advantages such as being an elastic compensation element that can freely expand and contract, reliable operation, good performance, and compact structure, it has been widely used in chemical, metallurgical, nuclear energy and other departments.

[0003] In the patent document with the publication number of CN 205894122 U that has been published, a metal expansion joint with a long service life is disclosed. In this published patent document, the stability of the corrugated pipe main body structure is improved through a support rod, and then through the cooperation of a connecting rod, an adjusting sleeve and a return spring, the elastic potential energy of the return spring is used to slow down the impact force and improve the service life of the metal expansion joint; however, the above-mentioned published patent document can only be connected to the required connecting pipeline in one way, that is, through a mounting seat (flange). When the flange holes of the two flanges do not correspond, they cannot be connected, and the flexibility of installation and connection is low. Content of the Utility Model

[0004] The purpose of the utility model is to provide a metal expansion joint with multiple connection methods, and solve the problems raised in the background technique.

[0005] The embodiment of the present application provides a metal expansion joint with multiple connection methods, including a metal corrugated pipe and two groups of fixing components. Flange plates are fixedly connected to the outer walls on the upper and lower sides of the metal corrugated pipe. Four flange holes are equidistantly arranged on the flange plates. Screws pass through and are threadedly connected inside the flange holes, and nuts two that match are sleeved on the screws. The two groups of fixing components are symmetrically arranged on the upper and lower parts of the metal corrugated pipe. Each group of fixing components includes four fixing plates one, four fixing plates two and eight threaded shafts. The fixing plates one and the fixing plates two are arranged up and down, and threaded holes that match the threaded shafts are opened on both sides of the fixing plates one and the fixing plates two. The threaded shafts pass through the threaded holes, and nuts three that match are sleeved on the threaded shafts.

[0006] By adopting the above technical solution, when the flange holes on the flange plate correspond to the flange holes of the required connecting pipeline flange, only need to pass the screw through the flange hole of the connecting pipeline, and then rotate the nut two to tighten and fix it to complete the installation of the metal expansion joint. When the flange holes on the flange plate do not correspond to the flange holes of the required connecting pipeline flange, place the flange plate and the required connecting pipeline flange between the fixing plates one and the fixing plates two, and then rotate the nut three to make the fixing plates one and the fixing plates two respectively closely press against the flange plate and the connecting pipeline flange, and the installation of the metal expansion joint can be completed.

[0007] Optionally, a plurality of first ridges are equidistantly arranged on one side of the first fixing plate close to the second fixing plate, and a plurality of second ridges are equidistantly arranged on one side of the second fixing plate close to the first fixing plate. The first ridges and the first fixing plate, and the second ridges and the second fixing plate are integrally formed by casting.

[0008] By adopting the above technical solution, the integrally formed first ridges and second ridges by casting can increase the friction force between the first fixing plate and the flange and between the second fixing plate and the flange of the connecting pipe, thereby preventing the fixed components of the installation connection from falling off and ensuring firm connection.

[0009] Optionally, four convex blocks are fixedly connected to the outer wall of each flange. A lead screw passes through and is in clearance fit with two vertically arranged convex blocks. Four matching nuts are sleeved on the lead screw, and every two nuts are located above and below one convex block.

[0010] By adopting the above technical solution, rotating the position of the nut on the lead screw can adjust and fix the distance between the two flanges, preventing damage caused by excessive stretching or compression of the metal bellows.

[0011] Optionally, the four convex blocks are equidistantly arranged on the outer wall of the flange.

[0012] By adopting the above technical solution, the stability of each position of the two flanges is ensured.

[0013] Optionally, O-shaped sealing rings are fixedly connected to the opposite sides of the two flanges, and the O-shaped sealing rings are adapted to the metal bellows.

[0014] By adopting the above technical solution, after the installation connection of the metal expansion joint, the sealing performance between the metal bellows and the connecting pipe is increased.

[0015] Optionally, sealant is filled between the flange and the metal bellows.

[0016] By adopting the above technical solution, the sealing performance at the connection between the flange and the metal bellows is increased.

[0017] Compared with the prior art, the beneficial effects of the technical solution of the present application are as follows:

[0018] 1. The installation of the metal expansion joint can be completed by passing the screw through the flange hole of the connecting pipe and then rotating the nut 2 to tighten it. It is suitable for the situation where the flange hole on the flange plate corresponds to the flange hole position of the required connecting pipe flange, and by placing the flange plate and the required connecting pipe flange between the fixing plate 1 and the fixing plate 2, and then rotating the nut 3 to make the fixing plate 1 and the fixing plate 2 tightly squeeze against the flange plate and the connecting pipe flange respectively, the installation of the metal expansion joint can be completed. It is suitable for the situation where the flange hole on the flange plate does not correspond to the flange hole position of the required connecting pipe flange, so that the metal expansion joint has multiple connection methods and flexible installation and connection methods.

[0019] 2. The one-piece cast convex strips 1 and 2 increase the friction between the fixing plate 1 and the flange and between the fixing plate 2 and the connecting pipe flange, thereby preventing the installed and connected fixing components from falling off and making the connection more secure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the utility model;

[0022] Figure 2 For this utility model Figure 1 A magnified view of middle A;

[0023] Figure 3 This is a structural diagram of a set of fixing components of the utility model.

[0024] In the figure: 1. Metal bellows; 2. Flange; 3. Bump; 4. Screw; 5. Nut 1; 6. Fixing plate 1; 7. Fixing plate 2; 8. Flange hole; 9. Screw; 10. Nut 2; 11. O-ring; 12. Threaded shaft; 13. Nut 3; 14. Raised strip 1; 15. Raised strip 2. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] See also Figures 1-3, the present utility model provides a technical solution: including a metal bellows 1 and two groups of fixing components. Flange plates 2 are fixedly connected to the outer walls on the upper and lower sides of the metal bellows 1. Four flange holes 8 are equidistantly arranged on the flange plates 2. Screws 9 pass through and are threadedly connected inside the flange holes 8. Nuts two 10 that match are sleeved on the screws 9. The two groups of fixing components are symmetrically arranged on the upper and lower parts of the metal bellows 1. Each group of fixing components includes four fixing plates one 6, four fixing plates two 7, and eight threaded shafts 12. The fixing plates one 6 and the fixing plates two 7 are arranged up and down. Threaded holes that match the threaded shafts 12 are opened on both sides of the fixing plates one 6 and the fixing plates two 7. The threaded shafts 12 pass through the threaded holes. Nuts three 13 that match are sleeved on the threaded shafts 12;

[0027] In this technical solution, when the flange holes 8 on the flange plates 2 correspond to the flange holes of the flange of the pipeline to be connected, only need to pass the screws 9 through the flange holes of the connecting pipeline, and then rotate the nuts two 10 to tighten and fix, then the installation of this metal expansion joint can be completed. When the flange holes 8 on the flange plates 2 do not correspond to the flange holes of the flange of the pipeline to be connected, place the flange plates 2 and the flange of the pipeline to be connected between the fixing plates one 6 and the fixing plates two 7, and then rotate the nuts three 13 to reduce the distance between the fixing plates one 6 and the fixing plates two 7, so that the fixing plates one 6 and the fixing plates two 7 are respectively in close contact and extrusion with the flange plates 2 and the connecting pipeline flange, then the installation of this metal expansion joint can be completed, making this metal expansion joint have multiple connection methods.

[0028] In some technical solutions, such as Figure 3 shown, a number of protrusions one 14 are equidistantly arranged on the side of the fixing plate one 6 close to the fixing plate two 7. A number of protrusions two 15 are equidistantly arranged on the side of the fixing plate two 7 close to the fixing plate one 6. The protrusions one 14 and the fixing plate one 6, and the protrusions two 15 and the fixing plate two 7 are integrally formed by casting.

[0029] During use, through the integrally formed protrusions one 14 and protrusions two 15 by casting, the friction force between the fixing plate one 6 and the flange plate 2 and between the fixing plate two 7 and the connecting pipeline flange can be increased, thereby preventing the fixing components of the installation connection from falling off and making the connection more firm.

[0030] In some technical solutions, such as Figure 1 shown, four protrusions 3 are fixedly connected to the outer wall of each flange plate 2. A lead screw 4 passes through and is in clearance fit connection between the two vertical protrusions 3. Four nuts one 5 that match are sleeved on the lead screw 4. Every two nuts one 5 are located above and below one protrusion 3.

[0031] During use, by rotating the position of the nuts one 5 on the lead screw 4, the distance between the two flange plates 2 can be adjusted and fixed, preventing damage caused by excessive stretching or compression of the metal bellows 1.

[0032] In some technical solutions, such as Figure 1 shown, four bumps 3 are equidistantly arranged on the outer wall of the flange 2.

[0033] During use, through the uniformly distributed lead screws 4, the stability of each position of the two flanges 2 is ensured.

[0034] In some technical solutions, such as Figure 2 shown, O-ring seals 11 are fixedly connected to the opposite sides of the two flanges 2, and the O-ring seals 11 are adapted to the metal bellows 1.

[0035] During use, after the installation and connection of the metal expansion joint, the sealing performance between the metal bellows 1 and the connecting pipe is increased.

[0036] In some technical solutions, such as Figure 2 shown, sealant is filled between the flange 2 and the metal bellows 1.

[0037] During use, the sealing performance at the connection between the flange 2 and the metal bellows 1 is increased.

[0038] Working principle: When the flange holes 8 on the flange 2 correspond to the flange holes of the flange of the required connecting pipe, only need to pass the screw 9 through the flange hole of the connecting pipe, and then rotate the second nut 10 to tighten and fix it to complete the installation of the metal expansion joint. When the flange holes 8 on the flange 2 do not correspond to the flange holes of the flange of the required connecting pipe, place the flange 2 and the flange of the required connecting pipe between the first fixing plate 6 and the second fixing plate 7, and then rotate the third nut 13 to reduce the distance between the first fixing plate 6 and the second fixing plate 7, so that the first fixing plate 6 and the second fixing plate 7 are respectively in close contact with the flange 2 and the connecting pipe flange, and the installation of the metal expansion joint can be completed. The metal expansion joint has a variety of connection methods, and through the integrally cast first rib 14 and second rib 15, the friction between the first fixing plate 6 and the flange 2 and between the second fixing plate 7 and the connecting pipe flange can be increased, thereby preventing the fixing components of the installation connection from falling off and the connection being firm.

[0039] The above are only the preferred embodiments of the present application and are not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A metal expansion joint with multiple connection methods, comprising a metal bellows (1) and two groups of fixing components, characterized in that: Flange plates (2) are fixedly connected to both the upper and lower outer walls of the metal bellows (1). Four flange holes (8) are equidistantly formed in the flange plates (2). Screws (9) pass through and are threadedly connected inside the flange holes (8). Nuts two (10) that match are sleeved on the screws (9). Two groups of the fixing components are symmetrically arranged at the upper and lower parts of the metal bellows (1). Each group of the fixing components includes four fixing plates one (6), four fixing plates two (7), and eight threaded shafts (12). The fixing plates one (6) and the fixing plates two (7) are arranged up and down. Threaded holes that match the threaded shafts (12) are formed on both sides of the fixing plates one (6) and the fixing plates two (7). The threaded shafts (12) pass through the threaded holes. Nuts three (13) that match are sleeved on the threaded shafts (12).

2. The metal expansion joint with multiple connection methods according to claim 1, characterized in that, A number of first ridges (14) are equidistantly arranged on one side of the fixing plate one (6) close to the fixing plate two (7). A number of second ridges (15) are equidistantly arranged on one side of the fixing plate two (7) close to the fixing plate one (6). The first ridges (14) and the fixing plate one (6), and the second ridges (15) and the fixing plate two (7) are integrally formed by casting.

3. The metal expansion joint with multiple connection methods according to claim 1, characterized in that, Four convex blocks (3) are fixedly connected to the outer wall of each flange plate (2). A lead screw (4) passes through and is in clearance fit with the two vertically arranged convex blocks (3). Four nuts one (5) that match are sleeved on the lead screw (4). Every two nuts one (5) are located above and below one of the convex blocks (3).

4. A metal expansion joint with multiple connection methods according to claim 3, characterized in that, The four convex blocks (3) are equidistantly arranged at the outer wall of the flange plate (2).

5. A metal expansion joint with multiple connection methods according to claim 1, characterized in that, O-ring seals (11) are fixedly connected to the opposite sides of the two flange plates (2). The O-ring seals (11) are adapted to the metal bellows (1).

6. The metal expansion joint with multiple connection methods according to claim 1, characterized in that, Sealant is filled between the flange plate (2) and the metal bellows (1).

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