CN216555797U - Flange joint and flange joint assembly - Google Patents

Abstract

The utility model discloses a flange joint, which comprises a flange plate and a joint part, wherein the flange plate is provided with a through hole which is positioned in the middle and extends axially, and a connecting part which is positioned at the periphery of the through hole, the through hole is used for being axially communicated with a first pipeline of a first installation base, and the connecting part is used for being axially connected with an installation part of the first installation base; the joint part is provided with a through hole which is positioned in the middle and extends axially, the through hole is used for being respectively and axially communicated with a second pipeline of the second installation base and a through hole of the flange plate, and when the joint part is axially communicated with the flange plate, the connecting part of the flange plate is positioned outside the peripheral wall of the joint part; the flange plate and the joint part are arranged in a split mode, and the surfaces, opposite to each other in the axial direction, of the flange plate and the joint part are radially extending planes. The flange joint has the advantage of being able to rotate easily in the circumferential direction. The utility model also discloses a flange joint assembly which also has the advantage of being convenient to rotate in the circumferential direction.

Description

Flange joint and flange joint assembly

Technical Field

The utility model relates to the technical field of flanges, in particular to a flange joint and a flange joint assembly.

Background

The flange joint is a common connection mode, and particularly has the advantages of convenient installation, effective sealing performance and the like in a scene needing sealing. Communication between two pipes can be achieved by means of a flange joint, which can be a single pipe or can be part of an installation base (e.g. a device).

For example, chinese patent application No. CN201310286145.8 (publication No. CN104279383A) discloses a threaded flange, which includes a flange body, a plurality of mounting holes are circumferentially formed on the flange body, a pipe hole is formed in the middle of the flange body, the pipe hole includes an upper pipe hole, a middle pipe hole and a lower pipe hole, the diameter of the upper pipe hole is larger than that of the lower pipe hole, an internal thread is formed on the inner wall of the lower pipe hole, the flange body is made of a titanium steel material, and a zinc coating is formed on the outer surface of the flange body. The threaded flange has the advantages of convenient connection and capability of avoiding leakage.

The process of connecting a flange joint to two pipes is generally: for convenience of description, the two pipelines are denoted as a first pipeline and a second pipeline, the first pipeline is a first part of a first installation foundation (that is, when the first installation foundation is equipment, the equipment is provided with the first pipeline and an installation hole positioned on the periphery of the first pipeline), the second installation foundation is provided with the second pipeline, during installation, the second pipeline of the second installation foundation is connected with a flange joint, then the flange joint and the second installation foundation are rotated, so that a connection hole on the flange joint is axially aligned with the installation hole on the first installation foundation, and then a bolt axially penetrates through the connection hole and the installation hole respectively, so that the first pipeline and the second pipeline are hermetically connected;

when a single first pipeline and a single second pipeline need to be communicated, two flange joints need to be arranged and are marked as a first flange joint and a second flange joint, during installation, the first flange joint is connected with the first pipeline, the second flange joint is connected with the second pipeline, and then a connecting hole of the first flange joint and a connecting hole of the second flange joint are fixed through a bolt, so that sealing connection between the first pipeline and the second pipeline is achieved.

The flange joint and the mounting base, and the first flange joint and the second flange joint are axially connected through bolts, and may also be axially locked through a locking structure (for example, in "a pipeline flange" disclosed in application No. CN201922245469.2, the locking grooves of the two flange plates of the pipeline flange need to be axially aligned so as to be axially locked by a locking clip), or may also be axially connected through the matching of positioning pins and positioning holes (for example, in "a flange joint convenient for stable butt joint" disclosed in application No. CN202021999003.8, the flange joint needs to be axially aligned with the positioning holes).

In summary, although the installation bases have different structures, the installation portion on the installation base (for example, the installation hole or the locking structure) and the connection portion on the flange (for example, the connection hole or the locking structure) have different structures, when the installation is carried out, the flange joint needs to be rotated circumferentially to a proper position so as to align the connection portion on the flange with the installation portion on the installation base axially. However, since the existing flange joint is an integral piece, the flange joint is connected with a mounting base and the mass is relatively large, so that circumferential rotation is inconvenient, and therefore, it is not easy to axially align the connecting part of the flange joint with the mounting part of the mounting base.

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the present invention is to provide a flange joint that can rotate in the circumferential direction conveniently, in view of the current state of the prior art.

The second technical problem to be solved by the present invention is to provide a flange joint that is convenient to disassemble and assemble, aiming at the current situation of the prior art.

A third technical problem to be solved by the present invention is to provide a flange joint assembly in view of the current situation of the prior art.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: a flange joint comprises

The flange plate is provided with a through hole which is positioned in the middle and extends axially, and a connecting part which is positioned on the periphery of the through hole, wherein the through hole is used for being axially communicated with a first pipeline of the first mounting base, and the connecting part is used for being axially connected with a mounting part of the first mounting base;

the joint part is provided with a through hole which is positioned in the middle and extends in the axial direction, the through hole is respectively and axially communicated with the second pipeline of the second installation base and the through hole of the flange plate, and when the joint part is axially communicated with the flange plate, the connecting part of the flange plate is positioned outside the peripheral wall of the joint part;

the method is characterized in that:

the flange plate and the joint part are arranged in a split way, and the surfaces of the flange plate and the joint part which are opposite in the axial direction are planes which extend in the radial direction;

when the flange plate is used for being connected with the mounting part of the first mounting base, the flange plate is axially abutted against the joint part, and the joint part is positioned between the first pipeline and the flange plate;

under the action of external force, the flange plate can rotate circumferentially relative to the joint part.

The technical scheme adopted for further solving the second technical problem of the utility model is as follows: the fitting portion has threads for threaded connection with a second pipe. Through threaded connection, the dismouting of being convenient for.

The shape of the joint part can be varied in many ways and, preferably,

the joint part comprises

The first part is provided with a first half through hole extending axially and is used for axially abutting against the flange plate;

and the second part is connected with the first part and is provided with a second half through hole axially communicated with the first half through hole, the through hole comprises a first half through hole and a second half through hole, the second part extends into the through hole of the flange plate, a gap for sleeving the second pipeline is arranged between the outer peripheral wall of the second part and the wall of the through hole in the radial direction, and the thread is positioned on the outer peripheral wall of the second part and is in threaded connection with the inner wall of the second pipeline.

In order to increase the tightness between the mounting base and the first part, the peripheral wall of the second part is fitted with an annular sealing ring, which is housed in the interspace and close to the first part, for axially sealing the second duct with the first part. Through setting up the annular seal circle, installation basis and the ascending leakproofness of first part axial are better like this, and the material in the installation basis is difficult to reveal, and the security is higher.

To facilitate the tightening of the first part and the mounting of the foundation, the outer wall of the first part is polygonal. In this way, the tool for tightening may grip the outer wall of the first part, thereby facilitating the tightening of the first part and the mounting of the foundation.

The screw thread may be provided at different positions, preferably on the wall of the through hole of the joint part. In this way, the flange joint can be adapted to a mounting base having an external thread.

In order to increase the sealing performance between the mounting base and the joint part, the hole wall of the through hole extends inwards in the radial direction to form an annular boss, the annular boss is close to the inner side of the thread in the axial direction, and an annular sealing ring for axially sealing the second pipeline and the annular boss is arranged on the annular boss. Through setting up cyclic annular boss and be convenient for install the annular seal circle, set up the annular seal circle, installation basis and cyclic annular boss upwards leakproofness is better in the circumference like this, and the material in the installation basis is difficult to reveal, and the security is better.

In order to increase the sealing performance between the joint part and the first pipeline, one side of the joint part close to the first pipeline is provided with an O-shaped sealing ring which is used for axially sealing the joint part and the first pipeline. Through setting up O type sealing washer, the leakproofness between joint portion and the first pipeline is better.

The technical scheme adopted by the utility model for solving the third technical problem is as follows: a flange joint subassembly that has above-mentioned flange joint is used to its characterized in that:

the connecting parts are connecting holes which are arranged at intervals along the circumferential direction of the flange plate and extend axially, and the mounting parts are mounting holes extending axially;

the flange joints are two and are marked as a first flange joint and a second flange joint, the first mounting base comprises a first flange joint and a first pipeline, and the connecting part of a flange plate of the first flange joint is a mounting part of the first mounting base;

the joint parts of the two flange joints are respectively connected with the first pipeline and the second pipeline, and the connecting parts of the two flange plates are axially connected through a fastener;

when the two flanges are axially connected, the two joint parts are positioned between the two flanges.

The fastening member may have various structures, and preferably, the fastening member is a bolt passing through the connection portion of the two flanges, and a nut fastening the end portion of the bolt to the corresponding flange.

Compared with the prior art, the utility model has the advantages that: the flange plate and the joint part are arranged in a split mode, and the opposite surfaces of the flange plate and the joint part in the axial direction are planes extending in the radial direction, so that when the flange plate is installed, the joint part is connected with a second pipeline of a second installation base, then the flange plate is rotated under the action of external force, and the flange plate is not fixed with the joint part connected with the second installation base and has relatively small mass, so that the flange plate can be conveniently and labor-saving rotated in the circumferential direction, and the connecting part on the flange plate is axially aligned with the installation part on the first installation base; after the connecting part on the flange plate is connected with the mounting part of the first mounting base, the flange plate is axially abutted to the joint part, so that the first pipeline and the second pipeline are communicated through the flange joint.

The flange joint assembly with the flange joint has the advantage of facilitating circumferential rotation of the flange plate.

Drawings

Fig. 1 is a schematic perspective view of a flange joint according to embodiment 1 of the present invention;

FIG. 2 is a perspective view of FIG. 1 from another angle;

FIG. 3 is an exploded view of FIG. 1;

fig. 4 is a perspective view of a flange joint assembly to which a flange joint of embodiment 1 of the utility model is applied;

FIG. 5 is an axial cross-sectional view of FIG. 4;

FIG. 6 is an exploded view of FIG. 4;

fig. 7 is a schematic perspective view of a flange joint according to embodiment 2 of the present invention;

FIG. 8 is a perspective view of FIG. 7 from another angle;

FIG. 9 is an exploded view of FIG. 7;

fig. 10 is a perspective view of a flange joint assembly to which a flange joint of embodiment 2 of the utility model is applied;

FIG. 11 is an axial cross-sectional view of FIG. 10;

FIG. 12 is an exploded view of FIG. 10;

fig. 13 is a perspective view of a flange joint assembly of embodiment 3 of the present invention;

FIG. 14 is an axial cross-sectional view of FIG. 13;

fig. 15 is a perspective view of a flange joint assembly of embodiment 4 of the present invention;

fig. 16 is an axial cross-sectional view of fig. 15.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

Example 1

As shown in fig. 1 to 3, a preferred embodiment of the flange joint of the present invention is shown.

Each flange joint comprises a flange plate 1, a joint part 2, an annular sealing ring 25 and an O-shaped sealing ring 27.

The flange plate 1 has a through hole 11 located in the middle and extending axially, and a connecting portion 12 located at the periphery of the through hole 11, wherein the through hole 11 is used for axially communicating with the first pipeline 4 of the first mounting base 100, and the connecting portion 12 is used for axially connecting with the mounting portion 6 of the first mounting base 100. In the embodiment, the connecting portions 12 are axially extending connecting holes, the connecting portions 12 are provided in a plurality, all the connecting portions 12 are circumferentially spaced along the outer periphery of the through hole 11, and the mounting portion 6 is an axially extending mounting hole.

The joint part 2 is annular and has a through hole 21 extending in the axial direction at the middle, the through hole 21 is used for being axially communicated with the second pipeline 5 of the second mounting base 200 and the through hole 11 of the flange 1, and the connecting part 12 of the flange 1 is positioned outside the peripheral wall of the joint part 2 when the joint part 2 is axially communicated with the flange 1. The joint part 2 also has threads 22 for screwing with the second pipe 5 of the second mounting base 200. Specifically, the joint part 2 includes a first portion 23 and a second portion 24. The first portion 23 has an axially extending first half-bore 231, the first portion 23 being adapted to abut axially against the flange 1. To facilitate the application of force by the tool, the outer wall of the first portion 23 is polygonal, for example substantially hexagonal, so that the tool grips the outer wall of the first portion 23 to tighten the first portion 23 and the second pipe 5. The second part 24 is connected with the first part 23, the second part 24 is provided with a second half through hole 241 axially communicated with the first half through hole 231, the through hole 21 comprises the first half through hole 231 and the second half through hole 241, the second part 24 extends into the through hole 11 of the flange plate 1 of the flange joint 100 where the second part is located, a gap for sleeving the second pipeline 5 is formed between the outer peripheral wall of the second part 24 and the hole wall of the through hole 11 in the radial direction, and the threads 22 are located on the outer peripheral wall of the second part 24 and are used for being in threaded connection with the inner wall of the second pipeline 5. The flange plate 1 and the joint part 2 are arranged separately and can axially abut against each other under the action of the connecting part 12, and the surfaces of the flange plate 1 and the joint part which are opposite in the axial direction are both planes which extend in the radial direction.

When the flange plate 1 is used for being connected with the mounting part 6 of the first mounting base 100, the flange plate 1 is axially abutted against the joint part 2, and the joint part 2 is positioned between the first pipeline 4 and the flange plate 1; under the action of external force, the flange plate 1 can rotate circumferentially relative to the connecting head part 2.

An annular sealing ring 25 is fitted around the outer peripheral wall of the second portion 24, the annular sealing ring 25 being housed in the gap and adjacent to the first portion 23, the annular sealing ring 25 serving to axially seal the second duct 5 with the first portion 23.

An O-ring 27 is provided on the side of the fitting part 2 adjacent to the first pipe 4, the O-ring 27 serving to axially seal the fitting part 2 and the first pipe 4.

Referring to fig. 4 to 6, the present embodiment further provides a flange joint assembly using the above-mentioned flange joint, the flange joint has two flange joints, which are denoted as a first flange joint 10 and a second flange joint 20, the first mounting base 100 includes the first flange joint 10 and the first pipeline 4, the second mounting base 200 is the second pipeline 5, and the connecting portion 12 of the flange plate 1 of the first flange joint 10 is the mounting portion 6 of the first mounting base 100 (in the present embodiment, the connecting portion 12 and the mounting portion 6 are axially extending through holes).

The joint parts 2 of the two flange joints are respectively connected with a first pipeline 4 and a second pipeline 5, and the connecting parts of the two flange plates 1 are axially connected through a fastener 3; when the two flanges 1 are axially connected, the two joint portions 2 are located between the two flanges 1. In the present embodiment, the fastening member 3 is a bolt 31 inserted through the connecting portion 12 of the two flanges 1, and a nut 32 fastening an end portion of the bolt 31 to the corresponding flange 1.

In other embodiments, the bolts 31 may be replaced by double-threaded screws, two ends of each double-threaded screw respectively penetrate through the connecting portions 12 of the two flanges 1 and then are fixed by the nuts 32, the connecting portions 12 on the two flanges 1 may also be replaced by slots (as shown in "a pipe flange" of application No. CN 201922245469.2) or positioning pins (as shown in "a flange joint for facilitating stable butt joint" of application No. CN 202021999003.8) which need to be axially connected, and correspondingly, the mounting portion of the first mounting base 100 adopts a locking structure which is in fit connection with the connecting portions.

The working principle and the using process of the flange joint assembly are as follows.

The flange joint is suitable for pipelines with internal threads. The first flange joint 10 on the left and the first pipe 4 constitute a first installation base 100. The second installation base 200 is a second duct 5.

During installation, the first pipeline 4 is connected with the left flange joint 10, specifically, the flange plate 1 is sleeved outside the first pipeline 4, the outer wall of the second part 24 of the joint part 2 is sleeved with the annular sealing ring 25, the outer walls of the first pipeline 4 and the second part 24 are in threaded connection, the first pipeline 4 is axially compressed by the annular sealing ring 25, and therefore the sealing performance between the first pipeline 4 and the first part 23 is good, substances in the first pipeline 4 are not prone to leakage, and the safety is high.

Similarly, the second pipe 5 on the right is again connected to the second flange connection 20 on the right.

Then, the O-ring 27 is placed between the two joint portions 2, the flange 1 on the left side or the right side is circumferentially rotated to axially align the connecting portions 12 (i.e., the connecting holes) on the two flange 1, the bolts 31 are inserted through the connecting portions 12 on the two flange 1, the ends of the bolts 31 are locked by the nuts 32, the flange 1 and the joint portions 2 axially abut against each other, so that the two joint portions 2 axially press the O-ring 27, and thus the sealed connection between the first pipeline 4 and the second pipeline 5 is realized by the two flange joints.

The flange joint of this embodiment can be used for the comparatively violent pipeline of changes of cold and heat such as highlight machine, for example, highlight machine needs accomplish in the twinkling of an eye by high temperature to low temperature or by low temperature to high temperature switching, bring very big cold and hot impact to each connection, through setting up O type sealing washer 27, ring type sealing washer 25 etc. for the flange joint has certain cold and hot buffering space in the axial, thereby can be applicable to the comparatively violent environment of changes of cold and heat, be difficult to like the flange joint through welded connection because of influencing the leakproofness because of splitting at the welding position.

Example 2

Fig. 7 to 9 show another preferred embodiment of the flange joint of the present invention. The structure of the flange joint is substantially the same as that of embodiment 1, except that: the joint part 2 is different in shape. Specifically, the thread 22 is located on the hole wall of the through hole 21 of the joint part 2. The hole wall of the through hole 21 extends radially inward to form an annular boss 26, the annular boss 26 is located close to the inner side of the thread 22 in the axial direction, and an annular seal ring 25 for axially sealing the second pipe 5 and the annular boss 26 is provided on the annular boss 26. The outer wall of the joint part 2 is polygonal, preferably substantially hexagonal, to facilitate the gripping of the tool. That is to say that the flange joint is suitable for pipes having an external thread.

Referring to fig. 10 to 12, the flange joint assembly of embodiment 2 is substantially identical to that of embodiment 1 in operation and use, except that: when the first pipe 4 is connected to the joint 2, the annular seal ring 25 is placed on the annular boss 26 of the joint 2, and then the external thread of the first pipe 4 is connected to the internal thread of the joint 2 by screw thread. The second pipe 5 is connected to the joint portion 2 in the same manner.

Example 3

Fig. 13 and 14 show another preferred embodiment of the flange joint assembly of the present invention.

The flange joint of this embodiment is different in shape from embodiment 1 in that: the first installation base 100 on the left side of the present embodiment 3 is an apparatus having the first pipe 4. The second mounting base 200 on the right is still the second pipe 5, and the equipment on the left has the mounting portion 6 (i.e., mounting hole) axially aligned with the connecting portion 12 (i.e., connecting hole) of the flange 1, and the bolt 31 penetrates through the connecting portion 12 and the mounting portion 6, thereby connecting the equipment on the left with the second pipe 5 on the right through a flange joint.

Example 4

Fig. 15 and 16 show another preferred embodiment of the flange joint assembly of the present invention.

The flange joint of this embodiment is different in shape from embodiment 2 in that: the first installation basis on the left side of this embodiment 4 is an apparatus having a first pipe 4. The second mounting base on the right is again the second pipe 5, the equipment on the left has a mounting portion 6 (i.e. mounting hole) axially aligned with the connecting portion 12 (i.e. connecting hole) of the flange, and the bolt 31 penetrates through the connecting portion 12 and the mounting portion 6, thereby connecting the equipment on the left with the second pipe 5 on the right through a flange joint.

Claims (10)

1. A flange joint comprises

The flange plate (1) is provided with a through hole (11) which is positioned in the middle and axially extends, and a connecting part (12) which is positioned on the periphery of the through hole (11), wherein the through hole (11) is used for being axially communicated with the first pipeline (4) of the first mounting base (100), and the connecting part (12) is used for being axially connected with the mounting part (6) of the first mounting base (100);

the joint part (2) is provided with a through hole (21) which is positioned in the middle and axially extends, the through hole (21) is respectively and axially communicated with the second pipeline (5) of the second mounting base (200) and the through hole (11) of the flange plate (1), and when the joint part (2) is axially communicated with the flange plate (1), the connecting part (12) of the flange plate (1) is positioned outside the peripheral wall of the joint part (2);

the method is characterized in that:

the flange plate (1) and the joint part (2) are arranged in a split manner, and the surfaces of the flange plate and the joint part, which are opposite in the axial direction, are radially extending planes;

when the flange plate (1) is connected with the mounting part (6) of the first mounting base (100), the flange plate (1) is axially abutted against the joint part (2), and the joint part (2) is positioned between the first pipeline (4) and the flange plate (1);

under the action of external force, the flange plate (1) can rotate circumferentially relative to the joint part (2).

2. The flange joint according to claim 1, wherein: the joint part (2) has a thread (22) for the threaded connection with a second pipe (5).

3. The flange joint according to claim 2, wherein:

the joint part (2) comprises

A first portion (23) having a first half-through hole (231) extending axially, the first portion (23) being adapted to abut axially against the flange (1);

and the second part (24) is connected with the first part (23), the second part (24) is provided with a second half through hole (241) which is axially communicated with the first half through hole (231), the through hole (21) comprises the first half through hole (231) and the second half through hole (241), the second part (24) extends into the through hole (11) of the flange plate (1), a gap for sleeving the second pipeline (5) is arranged between the outer peripheral wall of the second part (24) and the hole wall of the through hole (11) in the radial direction, and the thread (22) is positioned on the outer peripheral wall of the second part (24) and is used for being in threaded connection with the inner wall of the second pipeline (5).

4. The flange joint according to claim 3, wherein: the peripheral wall of the second portion (24) is fitted with an annular sealing ring (25), the annular sealing ring (25) being housed in the gap and close to the first portion (23), the annular sealing ring (25) being intended to axially seal the second duct (5) with the first portion (23).

5. The flange joint according to claim 3, wherein: the outer wall of the first portion (23) is polygonal.

6. The flange joint according to claim 2, wherein: the thread (22) is positioned on the wall of the through hole (21) of the joint part (2).

7. The flange joint according to claim 6, wherein: the hole wall of the through hole (21) extends inwards in the radial direction to form an annular boss (26), the annular boss (26) is close to the inner side of the thread (22) in the axial direction, and an annular sealing ring (25) used for axially sealing the second pipeline (5) and the annular boss (26) is arranged on the annular boss (26).

8. The flange joint according to any one of claims 1 to 7, wherein: an O-shaped sealing ring (27) is arranged on one side, close to the first pipeline (4), of the joint part (2), and the O-shaped sealing ring (27) is used for axially sealing the joint part (2) and the first pipeline (4).

9. A flange joint assembly to which the flange joint according to any one of claims 1 to 8 is applied, characterized in that:

the connecting parts (12) are connecting holes which are arranged along the circumferential direction of the flange plate (1) at intervals and extend axially, and the mounting parts (6) are mounting holes extending axially;

the flange joint is provided with two flange joints which are marked as a first flange joint (10) and a second flange joint (20), the first mounting base (100) comprises the first flange joint (10) and a first pipeline (4), and a connecting part (12) of a flange plate (1) of the first flange joint (10) is a mounting part (6) of the first mounting base (100);

the joint parts (2) of the two flange joints are respectively connected with a first pipeline (4) and a second pipeline (5), and the connecting parts of the two flange plates (1) are axially connected through a fastener (3);

when the two flange plates (1) are axially connected, the two joint parts (2) are positioned between the two flange plates (1).

10. The flange joint assembly of claim 9, wherein: the fastening pieces (3) are bolts (31) penetrating through the connecting parts (12) of the two flange plates (1) and nuts (32) fastening the end parts of the bolts (31) and the corresponding flange plates (1).

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