CN211449950U - Flexible joint - Google Patents

Abstract

The utility model provides a flexible joint, include: the elastic body is sleeved with a first flange ring and a second flange ring, and the elastic body is provided with a flow channel which penetrates up and down; a first annular flange and a second annular flange are respectively formed at two ends of the elastic body along the flow channel, a first mounting hole is formed in the first annular flange, and a second mounting hole is formed in the second annular flange; a first connecting hole which is opposite to the first mounting hole is formed in the first flange ring, and a second connecting hole which is opposite to the second mounting hole is formed in the second flange ring; through the arrangement, the first annular flange is clamped between the flange ring on the previous pipeline and the first flange ring and is connected with the flange ring on the previous pipeline, so that the first annular flange is prevented from falling off from the space between the flange ring on the previous pipeline and the first flange ring when the flexible joint is stressed; in a similar way, the second annular flange is prevented from falling off between the flange ring on the latter pipeline and the second flange ring when the flexible joint is stressed.

Description

Flexible joint

Technical Field

The utility model relates to a pipe fitting equipment technique especially relates to a flexible joint.

Background

The pipeline is a device for sealing transmission media, has the advantages of low transportation and maintenance cost, and is widely applied to the petroleum industry for conveying liquid and gas materials such as petroleum, natural gas and the like. When the pipeline system is used, a plurality of pipelines are sequentially connected together through joint equipment to form a pipeline system, so that transportation is realized; however, the pipeline is easily affected by transport media, outside air temperature and the like, and expansion with heat and contraction with cold are formed, so that the problems of deviation, axial expansion and the like are caused; it has become a hot point of research how to avoid the separation between adjacent pipes when the external temperature changes.

In the related art, adjacent pipes are connected by a flexible joint so that when an external temperature changes, separation between the adjacent pipes is prevented by elastic deformation of the flexible joint. The flexible joint generally comprises a rubber body, a first flange ring and a second flange ring, wherein the rubber body is provided with a hollow cavity which is communicated up and down, the middle part of the rubber body is provided with a spherical bulge, one end of the rubber body is outwards protruded along the radial direction to form a first annular flange, the other end of the rubber body is outwards protruded along the radial direction to form a second annular flange, the first flange ring and the second flange ring are sleeved on the rubber body between the first annular flange and the second annular flange, the first flange ring is positioned between the second flange ring and the first annular flange, the outer diameter of the first annular flange is smaller than that of the first flange ring, and the outer diameter of the second annular flange is smaller than that of the second flange ring; when the flange ring clamping device is used, the first flange ring is connected with a flange ring on a previous pipeline, so that the first annular flange is clamped between the first flange ring and the flange ring on the previous pipeline, and the second flange ring is connected with a flange ring on a next pipeline, so that the second annular flange is clamped between the second flange ring and the flange ring on the next pipeline; so as to realize the connection between two adjacent pipelines.

However, when the flexible joint is stressed, the first annular flange is easily separated from the first flange ring and the flange ring on the previous pipeline, and the second annular flange is easily separated from the second flange ring and the flange ring on the subsequent pipeline, so that pipeline leakage is caused.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a flexible joint to solve when flexible joint atress, first annular flange drops between the flange ring on by first flange ring and the preceding pipeline easily, and second annular flange drops between the flange ring on by second flange ring and the latter pipeline easily, and then leads to the technical problem of pipeline leakage.

An embodiment of the utility model provides a flexible joint, include: the flange type oil seal comprises an elastic body, a first flange ring and a second flange ring, wherein a flow channel is arranged on the elastic body and penetrates through the elastic body; the elastic body is provided with a first annular flange along one end of the flow channel, a first mounting hole is formed in the first annular flange, a second annular flange is formed along the other end of the flow channel in the elastic body, and a second mounting hole is formed in the second annular flange; the first flange ring and the second flange ring are sleeved on the elastic body and are positioned between the first annular flange and the second annular flange, and the first flange ring is positioned between the second flange ring and the first annular flange; the first flange ring is provided with a first connecting hole which is opposite to the first mounting hole, and the second flange ring is provided with a second connecting hole which is opposite to the second mounting hole.

The flexible joint is characterized in that a first clamping portion is arranged on the bottom surface of the first annular flange, a first clamping portion is arranged on the top surface of the first flange ring, and the first clamping portion is clamped with the first clamping portion; and a second clamping part is arranged on the bottom surface of the second annular flange, a second clamping part is arranged on the top surface of the second flange ring, and the second clamping part is clamped with the second clamping part.

The flexible joint as described above, wherein the first engaging portion includes a first annular protrusion disposed on a bottom surface of the first annular flange, and the first engaging portion includes a first annular groove disposed on a top surface of the first flange ring; the second clamping portion comprises a second annular bulge arranged on the bottom surface of the second annular flange, and the second clamping portion comprises a second annular groove arranged on the top surface of the second flange ring.

The flexible joint as described above, wherein the elastic body is provided at a middle portion thereof with a spherical convex portion protruding radially outward.

The flexible joint as described above, wherein a first annular fillet is disposed at a junction between the bottom surface of the first annular flange and the elastic body; and a second annular fillet is arranged at the junction position of the bottom surface of the second annular flange and the elastic body.

The flexible joint as described above, wherein the first flange ring has a first flange hole, and a first rib is disposed at an edge of the first flange hole, and the first rib is engaged with the first annular rounded corner; and the second flange ring is provided with a second flange hole, the edge of the second flange hole is provided with a second convex rib, and the second convex rib is matched with the second annular fillet.

The flexible joint as described above, wherein the first annular flange has an outer diameter that is the same as an outer diameter of the first flange ring, and the second annular flange has an outer diameter that is the same as an outer diameter of the second flange ring.

The flexible joint as described above, wherein the elastic body includes a rubber layer, a hard steel wire layer and a nylon ply, and the rubber layer, the hard steel wire layer and the nylon ply are sequentially stacked from a side wall of the elastic body away from the flow channel to a side wall of the elastic body close to the flow channel.

The flexible joint as described above, wherein the first flange ring and the second flange ring are carbon steel flange rings; or the first flange ring and the second flange ring are stainless steel flange rings.

The flexible joint as described above, wherein the top surface of the first annular flange is provided with a third annular groove communicating with the flow passage, and the top surface of the second annular flange is provided with a fourth annular groove communicating with the flow passage.

The embodiment of the utility model provides a flexible joint, include: the flange comprises an elastic body, a first flange ring and a second flange ring, wherein a flow channel is arranged on the elastic body and penetrates through the elastic body; a first annular flange is formed at one end of the elastic body along the flow channel, a first mounting hole is formed in the first annular flange, a second annular flange is formed at the other end of the elastic body along the flow channel, and a second mounting hole is formed in the second annular flange; the first flange ring and the second flange ring are sleeved on the elastic body and are positioned between the first annular flange and the second annular flange, and the first flange ring is positioned between the second flange ring and the first annular flange; the first flange ring is provided with a first connecting hole opposite to the first mounting hole, and the second flange ring is provided with a second connecting hole opposite to the second mounting hole. Through the arrangement, the first annular flange is clamped between the flange ring on the previous pipeline and the first flange ring, and the first annular flange, the flange ring and the first flange ring are connected together; the second annular flange is clamped between the flange ring on the rear pipeline and the second flange ring and is connected with the flange ring and the second flange ring; therefore, when the flexible joint is stressed, the first annular flange is prevented from falling off between the first flange ring and the flange ring on the previous pipeline, and the second annular flange is prevented from falling off between the second flange ring and the flange ring on the next pipeline, so that leakage is prevented.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a flexible joint according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an elastic body in a flexible joint according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a first flange ring of a flexible joint according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a second flange ring of a flexible joint in accordance with an embodiment of the present invention;

FIG. 5 is a cut-away view of FIG. 2;

FIG. 6 is a cutaway view of FIG. 4;

fig. 7 is a cut-away view of fig. 1.

Description of reference numerals:

10: an elastic body;

101: a first annular flange;

1011: a first mounting hole;

1012: a first annular projection;

1013: a first annular fillet;

102: a second annular flange;

1021: a second mounting hole;

1022: a second annular projection;

1023: a second annular fillet;

103: a spherical protrusion;

104: a third annular groove;

20: a first flange ring;

201: a first connection hole;

202: a first annular groove;

203: a first rib;

30: a second flange ring;

301: a second connection hole;

302: a second annular groove;

303: a second rib.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1 to 7, fig. 1 is a schematic structural view of a flexible joint according to an embodiment of the present invention; fig. 2 is a schematic structural view of an elastic body in a flexible joint according to an embodiment of the present invention; fig. 3 is a schematic structural view of a first flange ring of a flexible joint according to an embodiment of the present invention; FIG. 4 is a schematic structural view of a second flange ring of a flexible joint in accordance with an embodiment of the present invention; FIG. 5 is a cut-away view of FIG. 2; FIG. 6 is a cutaway view of FIG. 4; fig. 7 is a cut-away view of fig. 1.

As shown in fig. 1 to 4, the present embodiment provides a flexible joint including: the flange structure comprises an elastic body 10, a first flange ring 20 and a second flange ring 30, wherein a flow channel is arranged on the elastic body 10 and penetrates through the elastic body 10; a first annular flange 101 is formed on one end of the elastic body 10 along the flow channel, a first mounting hole 1011 is formed on the first annular flange 101, a second annular flange 102 is formed on the other end of the elastic body 10 along the flow channel, and a second mounting hole 1021 is formed on the second annular flange 102; the first flange ring 20 and the second flange ring 30 are sleeved on the elastic body 10 and are positioned between the first annular flange 101 and the second annular flange 102, and the first flange ring 20 is positioned between the second flange ring 30 and the first annular flange 101; the first flange ring 20 is provided with a first connection hole 201 facing the first mounting hole 1011, and the second flange ring 30 is provided with a second connection hole 301 facing the second mounting hole 1021.

Illustratively, the flexible joint provided by the present embodiment is used for connecting a previous pipeline and a next pipeline, so that the previous pipeline and the next pipeline are connected together for circulating liquid or gas such as oil, natural gas, sewage and the like. Specifically, the liquid outlet end of the previous pipeline and the liquid inlet end of the subsequent pipeline are both provided with flange rings, the flange ring on the previous pipeline is provided with a first pipeline connecting through hole, and the flange ring on the subsequent pipeline is provided with a second pipeline connecting through hole. When the pipeline flange device is used, the flange ring on the former pipeline is connected with the first flange ring 20 through bolts, and the flange ring on the latter pipeline is connected with the second flange ring 30 through bolts.

The first flange ring 20 is sleeved on the elastic body 10, can slide along the direction of the central line of the elastic body 10, and can rotate relative to the elastic body 10; be provided with first connecting hole 201 on the first flange ring 20, first connecting hole 201 is the through-hole, and the central line of first connecting hole 201 is parallel with the central line of first flange ring 20. The size of the first connection hole 201 is the same as that of the first pipeline connection through hole, so that a bolt can be inserted into the first pipeline connection through hole and the first connection hole 201 to bolt the first flange ring 20 to the flange ring on the previous pipeline; first connecting hole 201 can be a plurality of, and a plurality of first connecting holes 201 use the central line of first flange ring 20 to set up on first flange ring 20 as axis interval, and each first connecting hole 201 all just right with first pipeline connecting hole, through setting up a plurality of first connecting holes 201 for first flange ring 20 can be connected through a plurality of bolts with the flange ring on the preceding pipeline, has improved the reliability of relation of connection. A second flange ring 30 is located between the first flange ring 20 and the second annular flange 102, the second flange ring 30 being similar to the first flange ring 20; the second flange ring 30 is provided with a second connection hole 301, and the second connection hole 301 is similar to the first connection hole 201, and the description of this embodiment is omitted.

The elastic body 10 is a cylindrical cylinder, the interior of the elastic body is hollow, a flow channel is formed, and the flow channel may be cylindrical, or may be circular truncated cone or conical, which is not limited in this embodiment. The first annular flange 101 is formed by one end of the elastic body 10 protruding outward in the radial direction, and the second annular flange 102 is formed by the other end of the elastic body 10 protruding outward in the radial direction; the inner diameter of the first annular flange 101 is the same as the inner diameter of the flange ring on the previous pipeline, and the inner diameter of the second annular flange 102 is the same as the inner diameter of the flange ring on the subsequent pipeline, so that leakage at the joint of the flexible joint and the adjacent pipeline is avoided. The first annular flange 101 and the second annular flange 102 are integral with the elastic body 10, and the first annular flange 101 and the second annular flange 102 are also elastic. During installation, the first annular flange 101 is compressed, so that the first flange ring 20 is sleeved from one end of the elastic body 10; the second annular flange 102 is compressed to allow the second flange 30 to be inserted into the other end of the elastic body 10.

The side of the first annular flange 101 facing away from the first flange ring 20 is the top side of the first annular flange 101, and the side of the first annular flange 101 facing the first flange ring 20 is the bottom side of the first annular flange 101; the side of the second annular flange 102 facing away from the second flange ring 30 is a top surface of the second annular flange 102, and the side of the second annular flange 102 facing the second flange ring 30 is a bottom surface of the second annular flange 102. Optionally, the top surface of the first annular flange 101 and the top surface of the second annular flange 102 are both flat surfaces, so that the first annular flange 101, the second annular flange 102 and the flange ring of the adjacent pipeline are attached to each other, and the sealing performance is good. The side of the first flange ring 20 facing the first annular flange 101 is the top side of the first flange ring 20, and the side of the second flange ring 30 facing the second annular flange 102 is the top side of the second flange ring 30; the bottom surface of the first annular flange 101 and the top surface of the first flange ring 20 are not limited in this embodiment, as long as the bottom surface of the first annular flange 101 can be matched with the top surface of the first flange ring 20, and similarly, the bottom surface of the second annular flange 102 and the top surface of the second flange ring 30 are not limited in this embodiment.

The first annular flange 101 is provided with a first mounting hole 1011, the first mounting hole 1011 is a through hole, and a center line of the first mounting hole 1011 is parallel to a center line of the first annular flange 101. The size of the first mounting hole 1011 is the same as that of the first connecting hole 201, so that when the flange ring on the previous pipeline is in bolt connection with the first flange ring 20, a bolt can also penetrate through the first mounting hole 1011, so that the first annular flange 101 is clamped between and connected with the flange ring on the previous pipeline and the first flange ring 20; the first mounting holes 1011 can be a plurality of, and a plurality of first mounting holes 1011 use the central line of first annular flange 101 as the setting of axis interval on first annular flange 101, and each first mounting hole 1011 all just right with first connecting hole 201. The second annular flange 102 is provided with a second mounting hole 1021, and the second mounting hole 1021 is similar to the first mounting hole 1011, and the description of the embodiment is omitted.

The installation process of the flexible joint and the adjacent pipeline provided by the embodiment is as follows: firstly, butting a first annular flange 101 with a flange ring on a previous pipeline, and enabling a first mounting hole 1011 to be over against a first pipeline connecting through hole; then, the first flange ring 20 is rotated so that the first connection hole 201 faces the first mounting hole 1011; then, the bolt sequentially passes through the first pipeline connecting through hole, the first mounting hole 1011 and the first connecting hole 201 and is matched with the nut; similarly, the bolt sequentially passes through the second pipeline connecting through hole, the second mounting hole 1021 and the second connecting hole 301 and is matched with the nut; thereby realizing the connection between two adjacent pipelines.

This embodiment provides a flexible joint, includes: the flange structure comprises an elastic body 10, a first flange ring 20 and a second flange ring 30, wherein a flow channel is arranged on the elastic body 10 and penetrates through the elastic body 10; a first annular flange 101 is formed on one end of the elastic body 10 along the flow channel, a first mounting hole 1011 is formed on the first annular flange 101, a second annular flange 102 is formed on the other end of the elastic body 10 along the flow channel, and a second mounting hole 1021 is formed on the second annular flange 102; the first flange ring 20 and the second flange ring 30 are sleeved on the elastic body 10 and are positioned between the first annular flange 101 and the second annular flange 102, and the first flange ring 20 is positioned between the second flange ring 30 and the first annular flange 101; the first flange ring 20 is provided with a first connection hole 201 facing the first mounting hole 1011, and the second flange ring 30 is provided with a second connection hole 301 facing the second mounting hole 1021. Through the arrangement, the first annular flange 101 is clamped between the flange ring on the previous pipeline and the first flange ring 20, and the three are connected together; the second annular flange 102 is clamped between the flange ring on the rear pipeline and the second flange ring 30, and the three are connected together; therefore, when the flexible joint is stressed, the first annular flange 101 is prevented from falling off between the first flange ring 20 and the flange ring on the previous pipeline, and the second annular flange 102 is prevented from falling off between the second flange ring 30 and the flange ring on the next pipeline, so that leakage is prevented.

Meanwhile, because the first annular flange 101 and the second annular flange 102 have elasticity, the first annular flange 101 can serve as a gasket between the flange ring on the previous pipeline and the first flange ring 20, and the second annular flange 102 can serve as a gasket between the flange ring on the subsequent pipeline and the second flange ring 30, so that a sealing effect is achieved, and leakage at the joint is avoided.

Preferably, the outer diameter of the first annular flange 101 is the same as the outer diameter of the first flange ring 20, and both the outer diameters are the same as the outer diameter of the flange ring on the previous pipeline, so that the contact area between the flange ring on the previous pipeline and the first annular flange 101 is increased, the contact area between the first annular flange 101 and the first flange ring 20 is increased, and the stress on the joint is uniform. Similarly, the outer diameter of the second annular flange 102 is the same as the outer diameter of the second flange ring 30, and both are the same as the outer diameter of the flange ring on the latter pipe.

Taking the orientation shown in fig. 1 as an example, on the basis of the above embodiment, the middle portion of the elastic body 10 is provided with a spherical bulge 103 bulging outward in the radial direction, the first flange ring 20 is located between the spherical bulge 103 and the first annular flange 101, and the second flange ring 30 is located between the spherical bulge 103 and the second annular flange 102. With the above arrangement, on one hand, the sectional area of the spherical protrusion 103 is larger than the sectional areas of one end and the other end of the elastic body 10, so that the movement of the first flange ring 20 and the second flange ring 30 is limited, and the first flange ring 20 and the second flange ring 30 are prevented from colliding with each other; on the other hand, the volume of the flow channel is increased, so that the flow rate of the liquid passing through the middle part of the elastic body 10 in unit time is increased, and the flow rate is improved.

With continued reference to fig. 5 and 7, since the outer wall of the elastic body 10 provided with the spherical protrusion 103 is arc-shaped, and the bottom surface of the first annular flange 101 and the outer wall of the elastic body 10 form a sharp corner, which is easy to cause fatigue fracture, preferably, in order to improve the fatigue life of the elastic body 10, a first annular rounded corner 1013 may be provided at a boundary position between the bottom surface of the first annular flange 101 and the elastic body 10, so that an arc transition is formed between the bottom surface of the first annular flange 101 and the elastic body 10, thereby enhancing the strength of the elastic body 10. Wherein the outer wall of the elastomeric body 10 refers to the side wall of the elastomeric body 10 facing away from the flow channel. Similarly, a second annular fillet 1023 is disposed at a junction of the bottom surface of the second annular flange 102 and the elastic body 10.

With continued reference to fig. 6 and 7, further, the first flange ring 20 has a first flange hole, and an edge of the first flange hole is matched with a boundary position between the bottom surface of the first annular flange 101 and the elastic body 10, in order to improve the matching precision between the first flange ring 20 and the elastic body 10, so that the connection relationship between the first flange ring 20 and the elastic body 10 is more reliable, in this embodiment, a first protruding rib 203 in a circular arc shape is provided at the edge of the first flange hole, and the first protruding rib 203 is matched with the first annular rounded corner 1013. Similarly, the second flange ring 30 has a second flange hole, the edge of the second flange hole is provided with a second convex rib 303 in the shape of a circular arc, and the second convex rib 303 is matched with the second annular rounded corner 1023.

As shown in fig. 5 to 7, before the flexible joint is connected to an adjacent pipeline, the first flange ring 20 and the second flange ring 30 can rotate relative to the elastic body 10, so that the first connection hole 201 deviates from a position opposite to the first installation hole 1011, and the second connection hole 301 deviates from a position opposite to the second installation hole 1021; in order to avoid adjusting the positions of the first connecting hole 201 and the second connecting hole 301 during installation, in this embodiment, a first clamping portion is arranged on the bottom surface of the first annular flange 101, a first clamping portion is arranged on the top surface of the first flange ring 20, and the first clamping portion is clamped with the first clamping portion; a second clamping portion is arranged on the bottom surface of the second annular flange 102, a second clamping portion is arranged on the top surface of the second flange ring 30, and the second clamping portion is clamped with the second clamping portion. Through the arrangement, the first flange ring 20 is clamped with the first annular flange 101, and the second flange ring 30 is clamped with the second annular flange 102, so that the first flange ring 20 and the second flange ring 30 are limited to move; when the flexible joint is connected with an adjacent pipeline, the position of the first connecting hole 201 does not need to be adjusted by rotating the first flange ring 20, and meanwhile, the position of the second connecting hole 301 does not need to be adjusted by rotating the second flange ring 30, so that the installation process is simplified, and the operation is convenient.

The first clamping portion may be located on a side of the first mounting hole 1011 departing from the flow channel, and correspondingly, the first clamping portion is located on a side of the first connecting hole 201 departing from a center line of the first flange ring 20; the first clamping portion may also be located at one side of the first mounting hole 1011 close to the flow channel, and correspondingly, the first clamping portion is located at one side of the first connecting hole 201 close to the center line of the first flange ring 20.

In an implementation manner, the first clamping portion is a first hemispherical groove, and the first clamping portion is a first hemispherical protrusion matched with the first hemispherical groove; the second clamping part is a second hemispherical groove, and the second clamping part is a second hemispherical protrusion matched with the second hemispherical groove.

With continued reference to fig. 7, in another implementable manner, the first snap-fit portion includes a first annular projection 1012 provided on a bottom surface of the first annular flange 101, and the first snap-fit portion includes a first annular groove 202 provided on a top surface of the first flange ring 20; the second clamping portion includes a second annular protrusion 1022 disposed on a bottom surface of the second annular flange 102, and the second clamping portion includes a second annular groove 302 disposed on a top surface of the second flange ring 30. Compared with the previous mode, the clamping area of the first annular flange 101 and the first flange ring 20 is large, the clamping area of the second annular flange 102 and the second flange ring 30 is large, and the connection is firmer. Preferably, the first annular protrusion 1012 and the first annular flange 101 are integrally formed by injection molding, and the second annular protrusion 1022 and the second annular flange 102 are integrally formed by injection molding.

On the basis of the above embodiment, the elastic body 10 includes a rubber layer, a hard steel wire layer and a nylon cord fabric layer, which are sequentially stacked from the outer wall of the elastic body 10 to the inner wall of the elastic body 10. Wherein, the inner wall of the elastic body 10 refers to the side wall of the elastic body 10 close to the flow channel. Through connecting rubber layer and hard steel wire layer for elastic body 10 both has certain intensity, has good elasticity again, and when the change of external temperature caused adjacent pipeline expend with heat and contract with cold, elastic body 10 can produce elastic deformation, with the offset of compensating adjacent pipeline, avoids separating between the adjacent pipeline, prevents to leak. Of course, the elastic body 10 may also include a soft plastic layer, an elastic steel wire layer and a nylon cord fabric layer sequentially stacked from the outer wall of the elastic body 10 to the inner wall of the elastic body 10.

The first flange ring 20 may be made of carbon steel, such as QT450 (nodular cast iron), or may be made of stainless steel or alloy steel, so that the first flange ring 20 has higher strength, and when the flexible joint is connected to an adjacent pipeline, the first flange ring 20 can press the first annular flange 101 having elasticity, so that the connection relationship between the flexible joint and the flange ring on the previous pipeline is more reliable. Of course, the material of the first flange ring 20 may also be carbon fiber. In this embodiment, the material of the second flange ring 30 is similar to that of the first flange ring 20, and is not described herein again.

Optionally, the top surface of the first annular flange 101 is provided with a third annular groove 104 communicating with the flow passage, and the top surface of the second annular flange 102 is provided with a fourth annular groove communicating with the flow passage. Through the arrangement, the sealing performance of the joint of the first annular flange 101 and the flange ring on the previous pipeline can be improved, and meanwhile, the sealing performance of the joint of the second annular flange 102 and the flange ring on the subsequent pipeline can be improved. Wherein, the cross section of the third annular groove 104 and the cross section of the fourth annular groove are rectangular; in addition, arc-shaped chamfers are arranged at the boundary positions of the third annular groove 104 and the fourth annular groove and the inner wall of the elastic body 10.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless explicitly stated otherwise, the terms "mounting," "connecting," "fixing," and the like are to be understood in a broad sense, and for example, may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A flexible joint, comprising: the flange type oil seal comprises an elastic body, a first flange ring and a second flange ring, wherein a flow channel is arranged on the elastic body and penetrates through the elastic body; the elastic body is provided with a first annular flange along one end of the flow channel, a first mounting hole is formed in the first annular flange, a second annular flange is formed along the other end of the flow channel in the elastic body, and a second mounting hole is formed in the second annular flange;

the first flange ring and the second flange ring are sleeved on the elastic body and are positioned between the first annular flange and the second annular flange, and the first flange ring is positioned between the second flange ring and the first annular flange; the first flange ring is provided with a first connecting hole which is opposite to the first mounting hole, and the second flange ring is provided with a second connecting hole which is opposite to the second mounting hole.

2. The flexible joint of claim 1, wherein a first clamping portion is disposed on a bottom surface of the first annular flange, and a first engaging portion is disposed on a top surface of the first flange ring, and the first clamping portion is clamped with the first engaging portion; and a second clamping part is arranged on the bottom surface of the second annular flange, a second clamping part is arranged on the top surface of the second flange ring, and the second clamping part is clamped with the second clamping part.

3. The flexible joint of claim 2, wherein the first snap-fit portion includes a first annular protrusion disposed on a bottom surface of the first annular flange, the first snap-fit portion including a first annular groove disposed on a top surface of the first flange ring; the second clamping portion comprises a second annular bulge arranged on the bottom surface of the second annular flange, and the second clamping portion comprises a second annular groove arranged on the top surface of the second flange ring.

4. The flexible joint of claim 1, wherein the elastomeric body is provided with a spherical bulge in a central portion thereof projecting radially outward.

5. The flexible joint of claim 4, wherein a first annular fillet is provided at the interface of the bottom surface of the first annular flange and the elastomeric body; and a second annular fillet is arranged at the junction position of the bottom surface of the second annular flange and the elastic body.

6. The flexible joint of claim 5, wherein the first flange ring has a first flange aperture therein, the first flange aperture having a first rib disposed on an edge thereof, the first rib cooperating with the first annular fillet; and the second flange ring is provided with a second flange hole, the edge of the second flange hole is provided with a second convex rib, and the second convex rib is matched with the second annular fillet.

7. The flexible joint of any of claims 1-6, wherein the first annular flange has an outer diameter that is the same as an outer diameter of the first flange ring, and the second annular flange has an outer diameter that is the same as an outer diameter of the second flange ring.

8. The flexible joint of any of claims 1-6, wherein the elastomeric body comprises a rubber layer, a hard steel wire layer, and a nylon ply, the rubber layer, the hard steel wire layer, and the nylon ply being sequentially stacked from a sidewall of the elastomeric body facing away from the flow channel to a sidewall of the elastomeric body adjacent to the flow channel.

9. The flexible joint of claim 8, wherein the first and second flange rings are carbon steel flange rings; or the first flange ring and the second flange ring are stainless steel flange rings.

10. The flexible joint according to any one of claims 1-6, wherein the top surface of the first annular flange is provided with a third annular groove in communication with the flow passage, and the top surface of the second annular flange is provided with a fourth annular groove in communication with the flow passage.

Images