Flange pipe fitting

Abstract

The utility model relates to the technical field of connecting pieces, and discloses a flange pipe fitting which comprises a flange body, a boss is arranged in the middle of the flange body, the boss is connected to the end of a pipe body in a sleeved mode, a protruding ring is arranged on the inner wall of the boss, the end of the pipe body is limited through the protruding ring, and the flange body and the boss form an integral structure. A through hole is formed in the middle of the integral structure, the end of the pipe body is inserted into the through hole and limited through the protruding ring, and connection between the pipe body and the boss is achieved through welding. The connecting piece is fixed through the fixing nail, the internal thread is arranged in the connecting piece, the end portion of the bolt penetrates through the stepped hole to be installed with the connecting piece in a matched mode, limiting of the connecting piece is achieved conveniently, the nut used for installation is limited through the stepped hole, and fastening is achieved by rotating the bolt.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting pieces, in particular to a flange pipe fitting. Background Art

[0002] Flange connection is one of the ways to connect pipes. Flange connection is to fix two pipes, pipe fittings or equipment on a flange plate, then add a flange gasket between the two flange plates, and finally tighten the two flange plates with bolts to make them tightly combined. It is a detachable joint. It can realize the connection between a stationary pipe and a rotating or reciprocating device. The flange connection has high stability and good sealing performance.

[0003] A Chinese patent with application number CN202222046927.1 discloses a flange pipe fitting, including a flange plate, a flange connecting plate, a reinforcing rib, an O-shaped sealing groove, a clamp retaining column, a groove, a toothed mouth, a widened U-shaped strip gasket, a flange bolt hole, a flange connecting plate bolt hole, and a bolt. The flange pipe fitting is used in pairs, butt-jointed up and down, and fixed by bolt connection.

[0004] The existing flange connection holes are all circular holes, which are not convenient for realizing the limited installation of the nut. During the installation process, multiple wrenches are required to work together at the same time, and the installation process is cumbersome. Utility Model Content

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses a flange pipe fitting, comprising a flange body, a boss is provided in the middle of the flange body, the boss is sleeved on the end of the pipe body, a convex ring is provided on the inner wall of the boss, and the end of the pipe body is limited by the convex ring;

[0007] The flange body and the boss form an integral structure, a through hole is provided in the middle of the integral structure, the end of the tube body is inserted into the through hole, the tube body and the boss are connected by welding and limited by a convex ring.

[0008] Furthermore, a chamfered structure is provided on the inner side of the port of the boss. After the tube body is installed, a gap is formed between the chamfered structure and the outer side surface of the tube body. During welding, the weld falls into the gap.

[0009] Further, the flange body is provided with a plurality of annularly distributed step holes, the outer surface of the flange body is provided with a plurality of slot holes, the slot holes are connected with the corresponding step holes, a connecting piece is installed in the step holes, and a fixing nail is installed in the slot holes;

[0010] The installed connecting piece is fixed by a fixing nail, the interior of the connecting piece is provided with an internal thread, and the end of the bolt passes through the step hole and is installed in cooperation with the connecting piece.

[0011] Furthermore, a sealing ring is installed on the connection surface of the flange body, and a ring groove is provided at the connection surface of the flange body, and a sealing ring is installed in the ring groove;

[0012] When the two flange bodies are installed together, a sealing ring is installed between the ring grooves of the two flange bodies to improve the sealing effect;

[0013] Since the sealing surfaces of the ring groove and the sealing ring are both inclined surfaces, when the two flange bodies are tightly fitted by bolts, the ring groove and the sealing surface of the sealing ring are squeezed to improve the sealing effect.

[0014] The utility model has the following beneficial effects:

[0015] The nut used for installation in the utility model is limited by the step hole and is tightened by rotating the bolt.

[0016] The connecting piece installed by the utility model is fixed by a fixing nail, an internal thread is arranged inside the connecting piece, and the end of the bolt passes through the step hole and is installed in cooperation with the connecting piece, so as to realize the limiting of the connecting piece.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0021] Figure 3 The utility model is schematically shown in the cross-sectional structure Figure 1 ;

[0022] Figure 4 The utility model is schematically shown in the cross-sectional structure Figure 2 ;

[0023] Figure 5 This is a schematic diagram of the structure of the installation pipe body of the utility model;

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] In the figure: 1. flange body; 11. boss; 12. chamfered structure; 13. convex ring; 14. step hole; 15. slot hole; 16. ring groove; 2. connecting piece; 3. fixing pin; 4. sealing ring; 5. pipe body. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 5 As shown, the utility model is a flange pipe fitting, comprising a flange body 1, a boss 11 is provided in the middle of the flange body 1, the boss 11 is sleeved on the end of the pipe body 5, a convex ring 13 is provided on the inner wall of the boss 11, and the end of the pipe body 5 is limited by the convex ring 13;

[0028] The flange body 1 and the boss 11 form an integral structure, a through hole is provided in the middle of the integral structure, the end of the tube body 5 is inserted into the through hole, and the tube body 5 is limited by the convex ring 13, and the connection between the tube body 5 and the boss 11 is achieved by welding;

[0029] A chamfered structure 12 is provided on the inner side of the port of the boss 11. After the tube body 5 is installed, a gap is formed between the chamfered structure 12 and the outer side surface of the tube body 5. During welding, the weld falls into the gap.

[0030] The flange body 1 is provided with a plurality of annularly distributed step holes 14, and the outer surface of the flange body 1 is provided with a plurality of slot holes 15, the slot holes 15 are connected with the corresponding step holes 14, the step holes 14 are fitted with connectors 2, and the slot holes 15 are fitted with fixing nails 3;

[0031] The installed connecting piece 2 is fixed by a fixing nail 3. The interior of the connecting piece 2 is provided with an internal thread. The end of the bolt passes through the stepped hole 14 and is installed in cooperation with the connecting piece 2.

[0032] A sealing ring 4 is installed on the connection surface of the flange body 1, and an annular groove 16 is provided on the connection surface of the flange body 1, and the sealing ring 4 is installed in the annular groove 16;

[0033] When the two flange bodies 1 are assembled together, a sealing ring 4 is installed between the annular grooves 16 of the two flange bodies 1 to improve the sealing effect;

[0034] Since the sealing surfaces of the annular groove 16 and the sealing ring 4 are both inclined surfaces, when the two flange bodies 1 are tightly fitted by bolts, the annular groove 16 and the sealing surfaces of the sealing ring 4 are squeezed to improve the sealing effect.

[0035] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A flange pipe fitting, comprising a flange body (1), characterized in that: A boss (11) is provided in the middle of the flange body (1), and a plurality of annularly distributed step holes (14) are provided on the flange body (1); A plurality of slotted holes (15) are provided on the outer surface of the flange body (1), and the slotted holes (15) are connected to corresponding step holes (14); A convex ring (13) is provided on the inner wall of the boss (11), and a sealing ring (4) is installed on the connecting surface of the flange body (1).

2. A flange pipe fitting according to claim 1, characterized in that: A connecting piece (2) is cooperatively installed in the step hole (14); A fixing nail (3) is mounted in the slotted hole (15).

3. A flange pipe fitting according to claim 1, characterized in that: A chamfered structure (12) is provided on the inner side of the port of the boss (11).

4. A flange pipe fitting according to claim 1, characterized in that: The connecting surface of the flange body (1) is provided with an annular groove (16); A sealing ring (4) is mounted in the annular groove (16).

5. A flange pipe fitting according to claim 1, characterized in that: The boss (11) is sleeved on the end of the tube body (5), and the end of the tube body (5) is limited by a convex ring (13).

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