Double-side butt joint different-diameter flange

Abstract

The utility model belongs to the technical field of pressure pipelines and pressure containers, and particularly relates to a double-side butt joint different-diameter flange. According to the technical scheme, the double-side butt joint different-diameter flange comprises a double-side butt joint different-diameter flange body, a flange butt welding end is arranged on one side of the double-side butt joint different-diameter flange body, a boss butt welding end is arranged on the other side of the double-side butt joint different-diameter flange body, and the flange butt welding end and the boss butt welding end can be in butt joint full penetration welding with a pipe respectively. A butt welding end is added while one end of a standard flange is kept to be welded and the other end of the standard flange is kept to be connected through a bolt, so that the limitations that full penetration welding cannot be realized and the flange is not suitable for high pressure and large caliber due to the fact that a blind flange opening and pipe welding are generally adopted are avoided. The utility model provides a double-side butt joint reducing flange which is not limited by pressure and size.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure pipelines and pressure vessels, and particularly relates to a double-side butt-jointed reducing flange. Background Art

[0002] In the pipeline of the process device, it is often necessary to install a mixer or instrument measuring element on the main branch and to facilitate disassembly and installation.

[0003] like Figure 5 As shown in the figure, the common practice is to open a through hole on the blind flange, insert the pipe through the through hole of the blind flange and locally weld it to the blind flange, and then connect the insert pipe and the blind flange as a whole to the flange welded on the main branch. The weld between the insert pipe and the blind flange is a fillet weld, and the insert pipe and the blind flange are usually not fully welded. Therefore, this structure is only suitable for occasions with low pressure and small insert pipes. With the increase of pressure or the increase of the size of the insert pipe, this connection method becomes more and more unreliable and urgently needs to be improved. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the purpose of the utility model is to provide a double-sided butt-jointed reducing flange, which improves the connection method between the insertion tube and the flange and is not limited by pressure and size.

[0005] The technical solution adopted by the utility model is:

[0006] A double-sided butt-jointed reducing flange comprises a double-sided butt-jointed reducing flange body, a flange butt-welding end is arranged on one side of the double-sided butt-jointed reducing flange body, a boss butt-welding end is arranged on the other side of the double-sided butt-jointed reducing flange body, the flange butt-welding end and the boss butt-welding end are respectively welded to an insertion tube, a main tube is sleeved on the insertion tube, and the main tube is connected to the double-sided butt-jointed reducing flange body.

[0007] The double-sided butt-jointed reducing flange of the utility model has an additional boss butt-welding end on the sealing surface that can be butt-welded to the pipe on the basis of the standard reducing flange. Both sides of the double-sided butt-jointed reducing flange are butt-welded to the inserted pipe, and the welding structure has undergone a fundamental change, which can realize full penetration welding on both sides, facilitate radiographic detection, greatly improve reliability, and is no longer limited by the size of the inserted pipe and the design pressure of the pipeline, and can be used in high temperature and high pressure conditions.

[0008] As a preferred solution of the utility model, the end of the flange butt-welding end and the end of the boss butt-welding end are respectively fully penetrated and welded to the insertion tube.

[0009] As a preferred solution of the present invention, the end surface of the insertion tube is an inclined surface inclined relative to the axis of the insertion tube.

[0010] As a preferred solution of the utility model, the main pipe includes a main pipe body, the main pipe body is connected with a matching flange, the matching flange is sleeved on the insertion pipe, and the matching flange is connected to the double-sided butt-jointed reducing flange body.

[0011] As a preferred solution of the utility model, the matching flange is connected to the double-sided butt-jointed reducing flange body by a plurality of bolts.

[0012] As a preferred solution of the utility model, a branch section is connected to the side wall of the main pipe body, the branch section is connected to the matching flange, and the end of the insertion tube extends into the main pipe body.

[0013] As a preferred solution of the present utility model, the branch section is welded to the matching flange.

[0014] As a preferred solution of the present utility model, the branch section is perpendicular to the main pipe body.

[0015] As a preferred solution of the utility model, the sealing surface of the double-sided butt-jointed reducing flange body is a raised surface connection surface. According to needs, the sealing surface of the double-sided butt-jointed reducing flange can also be made into other types. For example, when the matching flange is a ring connection surface, the sealing surface of the double-sided butt-jointed reducing flange can also be made into a ring connection surface.

[0016] As a preferred solution of the utility model, the boss butt welding end is located on the side of the double-sided butt-jointed reducing flange body close to the main pipe, and the flange butt welding end is located on the side of the double-sided butt-jointed reducing flange body away from the main pipe.

[0017] The beneficial effects of the utility model are:

[0018] The double-sided butt-jointed reducing flange of the utility model has an additional boss butt-welding end on the sealing surface that can be butt-welded to the pipe on the basis of the standard reducing flange. Both sides of the double-sided butt-jointed reducing flange are butt-welded to the inserted pipe, and the welding structure has undergone a fundamental change, which can realize full penetration welding on both sides, facilitate radiographic detection, greatly improve reliability, and is no longer limited by the size of the inserted pipe and the design pressure of the pipeline, and can be used in high temperature and high pressure conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 This is a sample diagram of a pipeline mixer using double-sided butt-jointed reducing flanges;

[0021] Figure 3 It is a structural schematic diagram of a double-sided butt-jointed reducing flange with a ring connection surface;

[0022] Figure 4 This is a schematic diagram of the structure of a standard reducing flange;

[0023] Figure 5 This is a sample diagram of an existing pipeline mixer.

[0024] In the figure: 1- double-sided butt-jointed reducing flange body; 2- inserted pipe; 3- main pipe; 11- flange butt welding end; 12- boss butt welding end; 31- main pipe body; 32- matching flange; 33- branch section. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0027] like Figure 1 to Figure 3 As shown, a double-sided butt-jointed reducing flange of this embodiment includes a double-sided butt-jointed reducing flange body 1, a flange butt-welding end 11 is provided on one side of the double-sided butt-jointed reducing flange body 1, a boss butt-welding end 12 is provided on the other side of the double-sided butt-jointed reducing flange body 1, an insert pipe 2 is inserted into the double-sided butt-jointed reducing flange body 1, the flange butt-welding end 11 and the boss butt-welding end 12 are respectively welded to the insert pipe 2, a main pipe 3 is sleeved on the insert pipe 2, and the main pipe 3 is connected to the double-sided butt-jointed reducing flange body 1. The boss butt-welding end 12 is located on the side of the double-sided butt-jointed reducing flange body 1 close to the main pipe 3, and the flange butt-welding end 11 is located on the side of the double-sided butt-jointed reducing flange body 1 away from the main pipe 3.

[0028] The core of the utility model is to create a double-sided butt-welded reducing flange that can be butt-welded with an inserted pipe 2 on both sides of the flange and can be paired with a standard flange at the same time. The double-sided butt-welded reducing flange is improved on the basis of the standard reducing flange, that is, a boss butt-welding end 12 that can be butt-welded with a pipe is added on the sealing surface. For the convenience of comparison, the standard reducing flange is as follows Figure 4 shown.

[0029] The end of the flange butt welding end 11 and the end of the boss butt welding end 12 are respectively fully penetrated and welded to the insertion tube 2. The end surface of the insertion tube 2 is an inclined surface inclined relative to the axis of the insertion tube 2.

[0030] Specifically, the main pipe 3 includes a main pipe body 31, a matching flange 32 is connected to the main pipe body 31, the matching flange 32 is sleeved on the insertion pipe 2, and the matching flange 32 is connected to the double-sided butt-jointed reducing flange body 1. The matching flange 32 is connected to the double-sided butt-jointed reducing flange body 1 by a plurality of bolts.

[0031] The side wall of the main pipe body 31 is connected with a branch section 33, which is connected to the matching flange 32, and the end of the insertion tube 2 extends into the main pipe body 31. The branch section 33 is welded to the matching flange 32. The branch section 33 is perpendicular to the main pipe body 31.

[0032] Furthermore, the sealing surface of the double-sided butt-jointed reducing flange body 1 is a raised surface (RF) connection surface. As required, the sealing surface of the double-sided butt-jointed reducing flange can also be made into other types. For example, when the matching flange 32 is a ring connection surface, the sealing surface of the double-sided butt-jointed reducing flange can also be made into a ring connection surface.

[0033] from Figure 1 It can be seen that both sides of the double-sided butt-jointed reducing flange are butt-welded to the insert pipe 2, and the welding structure has undergone a fundamental change, which can achieve full penetration welding on both sides, facilitate X-ray detection, greatly improve reliability, and is no longer limited by the size of the insert pipe 2 and the design pressure of the pipeline, and can be used in high temperature and high pressure conditions.

[0034] As required, the sealing surface of the double-sided butt-jointed reducing flange can also be made into other types. For example, when the matching flange 32 is a ring joint surface (RJ), the sealing surface of the double-sided butt-jointed reducing flange can also be made into a ring joint surface (RJ). Figure 3 Shown

[0035] In summary, adding a butt-welding end of a boss to a standard reducing flange enables both sides of the flange to be welded to the pipe, while retaining the original sealing surface of the standard reducing flange. This makes the application of occasions such as pipeline mixers no longer limited by pipe size and pipeline design pressure, while greatly increasing reliability.

[0036] Application prospects: This double-sided butt-jointed reducing flange breaks through the current situation that conventional flanges can only be welded on one side and bolted on the other side. It enables both sides of the flange to be welded to the pipe while retaining the detachability of the flange. It will surely promote the wider application of large-size pipeline mixers or instrument measuring elements on high-pressure pipelines and has broad application prospects in the petrochemical industry.

[0037] The present utility model is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present utility model fall within the protection scope of the present utility model.

Claims

1. A double-sided butt-jointed reducing flange, characterized in that: The invention comprises a double-sided butt-jointed reducing flange body (1), wherein a flange butt-welding end (11) is arranged on one side of the double-sided butt-jointed reducing flange body (1), and a boss butt-welding end (12) is arranged on the other side of the double-sided butt-jointed reducing flange body (1), wherein the flange butt-welding end (11) and the boss butt-welding end (12) are respectively welded to an insert pipe (2), a main pipe (3) is sleeved on the insert pipe (2), and the main pipe (3) is connected to the double-sided butt-jointed reducing flange body (1).

2. A double-sided butt-jointed reducing flange according to claim 1, characterized in that: The end of the flange butt-welding end (11) and the end of the boss butt-welding end (12) are respectively fully penetrated and welded to the insertion tube (2).

3. The double-sided butt-jointed reducing flange according to claim 1, characterized in that: The end surface of the insertion tube (2) is an inclined surface inclined relative to the axis of the insertion tube (2).

4. The double-sided butt-jointed reducing flange according to claim 1, characterized in that: The main pipe (3) comprises a main pipe body (31), a matching flange (32) is connected to the main pipe body (31), the matching flange (32) is sleeved on the insertion pipe (2), and the matching flange (32) is connected to a double-sided butt-jointed reducing flange body (1).

5. The double-sided butt-jointed reducing flange according to claim 4, characterized in that: The matching flange (32) is connected to the double-sided butt-jointed reducing flange body (1) via a plurality of bolts.

6. The double-sided butt-jointed reducing flange according to claim 4, characterized in that: A branch section (33) is connected to the side wall of the main pipe body (31), the branch section (33) is connected to the matching flange (32), and the end of the insertion tube (2) extends into the main pipe body (31).

7. The double-sided butt-jointed reducing flange according to claim 6, characterized in that: The branch section (33) is welded to the matching flange (32).

8. The double-sided butt-jointed reducing flange according to claim 6, characterized in that: The branch section (33) is perpendicular to the main pipe body (31).

9. The double-sided butt-jointed reducing flange according to claim 1, characterized in that: The sealing surface of the double-sided butt-jointed reducing flange body (1) is a raised surface connection surface.

10. A double-sided butt-jointed reducing flange according to any one of claims 1 to 9, characterized in that: The boss butt welding end (12) is located on a side of the double-sided butt-jointed reducing flange body (1) close to the main pipe (3), and the flange butt welding end (11) is located on a side of the double-sided butt-jointed reducing flange body (1) far from the main pipe (3).

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