CN111637295A - An axial expansion joint with double flange sealing type - Google Patents

Abstract

The invention discloses a double-flange sealing type axial expansion joint, which relates to the technical field of pipe connection, and includes a joint body pipe; a double-flange assembly, the double-flange assembly includes an axial sealing flange and a plane connected to each other. a sealing flange, the axial sealing flange and the flat sealing flange are both sleeved on the second end; and a sealing assembly, the sealing assembly including the axial sealing flange and the flat surface An axial sealing ring between the sealing flanges, the axial sealing ring has a radial sealing surface pressing against the outer peripheral surface of the second end, the axial sealing flange and/or the plane sealing flange It has a radial inclined surface, so that the radial sealing surface of the axial sealing ring presses against the outer peripheral surface of the second end portion. The axial expansion joint of the double flange sealing type of the present invention can absorb the axial movement of the pump body when it works, and ensure the safety and reliability of the pipeline connecting the pump body.

Description

An axial expansion joint with double flange sealing type

technical field

The invention relates to the technical field of pipe connection, in particular to an axial expansion joint of double flange sealing type.

Background technique

In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art. At present, the diameter of the pipes connected to the pump body of a large dredger, such as a mud pump or a high-pressure flushing pump, is between DN500 and DN1200mm. , During the dredging operation, the vibration of the high-power mud pump or the high-pressure flushing pump is difficult to avoid, so the pipeline connecting the suction port of the pump body has a great axial movement due to the vibration of the pump body. Therefore, the pipes that are rigidly and fixedly installed must be provided with effective axial expansion joints.

Commonly used axial expansion joints include metal bellows expansion joints and rubber expansion joints. However, the strength of these two expansion joints is difficult to meet the severe working conditions of long-term vibration and expansion, and there are often damage and water leakage, which affects the normal dredging work of the ship, and even poses a safety hazard of water inflow into the pump room.

SUMMARY OF THE INVENTION

The present invention aims to solve one of the above-mentioned technical problems in the prior art at least to a certain extent. To this end, the embodiment of the present invention provides an axial expansion joint of double flange sealing type, which is installed at the suction port end of the pump body to absorb the axial movement of the pump body during operation and ensure the pipeline connecting the pump body. Safe and reliable.

The axial expansion joint of the double-flange sealing type according to the embodiment of the present invention includes a joint body tube, and the two ends of the joint body tube are respectively formed with a first end and a second end; a double flange assembly, the double The flange assembly includes a connected axial sealing flange and a flat sealing flange, the axial sealing flange and the flat sealing flange are both sleeved on the second end, and the axial sealing flange There is an axial expansion and contraction gap between the plane sealing flange and the second end, and an axial expansion and contraction gap is provided between the plane sealing flange and the second end; An axial sealing ring between the axial sealing flange and the plane sealing flange, the axial sealing ring has a radial sealing surface that presses against the outer peripheral surface of the second end, and the axial sealing flange And/or the radially inclined surface of the plane sealing flange, so that the radial sealing surface of the axial sealing ring presses against the outer peripheral surface of the second end portion.

In an optional or preferred embodiment, the inner end face of the axial sealing flange is provided with an inner chamfer, so that after the axial sealing flange and the plane sealing flange are connected, there is a supply space between the two. The axial sealing ring groove in which the axial sealing ring is placed, the axial sealing ring groove is disposed toward the second end, and the radial slope is arranged on the axial sealing ring groove.

In an optional or preferred embodiment, the inner end surface of the flat sealing flange and the radial inclined surface enclose the axial sealing ring groove.

In an optional or preferred embodiment, the axial sealing ring is an annular sealing ring, and the cross-section of the axial sealing ring is triangular.

In an optional or preferred embodiment, the axial sealing flange and the flat sealing flange are connected by several bolts, so that the inner end face of the flat sealing flange and the radial inclined surface are clamped together. The corresponding side of the axial sealing ring.

In an optional or preferred embodiment, both the axial sealing flange and the flat sealing flange are provided with a plurality of bolt holes for the bolts to pass through.

In an optional or preferred embodiment, the outer end surface of the flat sealing flange is provided with a flat sealing groove, and a flat sealing ring is placed in the flat sealing groove.

In an optional or preferred embodiment, after the double flange assembly is connected to the suction port end of the pump body, the outer end face of the flat sealing ring is pressed against the suction port end of the pump body.

In an optional or preferred embodiment, the axial sealing ring is a rubber material member, and the flat sealing ring is a rubber material member.

In an optional or preferred embodiment, the first end is welded with a connecting flange.

Based on the above technical solution, the embodiment of the present invention has at least the following beneficial effects: the above technical solution, the double flange assembly is sealed with the second end of the joint body tube through the radial sealing surface of the axial sealing ring, and the axial sealing method There is an axial expansion and contraction gap between the flange and the second end, and there is an axial expansion and contraction gap between the flat sealing flange and the second end. Vibration will be generated, and there will be a lot of axial movement. The axial sealing flange and the flat sealing flange can move axially along the second end, and the axial sealing ring can ensure the sealing; in addition, by setting the diameter On the inclined surface, after the axial sealing flange is connected with the flat sealing flange, the radial sealing surface of the axial sealing ring can be pressed against the outer peripheral surface of the second end, so as to further ensure the sealing performance of the axial sealing ring. The axial expansion joint of the double flange sealing type of the present invention can absorb the axial movement of the pump body when it works, and ensure the safety and reliability of the pipeline connecting the pump body.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly describes the accompanying drawings that are used in the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, but not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings according to these drawings without creative work.

1 is a half-section view of an embodiment of the present invention;

Fig. 2 is a partial enlarged view of circle A in Fig. 1;

Fig. 3 is the partial enlarged view of B circle in Fig. 2;

FIG. 4 is a partial enlarged view of the circle C in FIG. 2 .

Detailed ways

This part will describe the specific embodiments of the present invention in detail, and the preferred embodiments of the present invention are shown in the accompanying drawings. Each technical feature and overall technical solution of the invention should not be construed as limiting the protection scope of the invention.

In the description of the present invention, it should be understood that orientation descriptions are involved, such as center, longitudinal, lateral, length, width, thickness, top, bottom, front, back, left, right, vertical, horizontal, top, bottom The orientation or positional relationship indicated by , inside, outside, clockwise, counterclockwise, axial, radial, circumferential, etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, and It is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including this number, above, below, within, etc. are understood as including this number, unless otherwise There are clear and specific restrictions. In addition, if it is described that the first and second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or implicitly indicating the indicated technical features. the sequence relationship.

In the description of the present invention, unless otherwise clearly defined, terms such as setting, arranging, installing, connecting, connecting, fixing, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine that the above terms are used in the present invention in combination with the specific content of the technical solution. specific meaning in .

In the description of the present invention, unless otherwise expressly defined, the first feature is above or below the second feature, the first feature and the second feature may be in direct contact, or the first feature and the second feature may be in indirect contact through an intermediate medium. Also, the first feature is above/above/above the second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is below/below/below the second feature, which can mean that the first feature is directly below or obliquely below the second feature, or just means that the level of the first feature is smaller than the second feature.

Referring to FIGS. 1 to 4 , an axial expansion joint of double flange sealing type includes a joint body pipe 100 , a double flange assembly 300 and a sealing assembly.

Wherein, both ends of the joint body tube 100 are respectively formed with a first end portion 101 and a second end portion 102 . The first end 101 is welded with a connecting flange 200, and the double flange assembly 300 includes an axial sealing flange 321 and a plane sealing flange 311 connected to each other, and both the axial sealing flange 321 and the plane sealing flange 311 are sleeved on the first on the two ends 102 . As shown in FIG. 2 , there is an axial expansion and contraction gap between the axial sealing flange 321 and the second end 102 , and an axial expansion and contraction gap exists between the plane sealing flange 311 and the second end 102 .

The sealing assembly includes an axial sealing ring 323 located between the axial sealing flange 321 and the plane sealing flange 311. The axial sealing ring 323 has a radial sealing surface 3231 that presses against the outer peripheral surface of the second end portion 102. The sealing flange 321 and/or the flat sealing flange 311 have a radially inclined surface, so that the radial sealing surface 3231 of the axial sealing ring 323 presses against the outer peripheral surface of the second end portion 102 .

It can be understood that both the axial sealing flange 321 and the flat sealing flange 311 can move axially telescopically along the second end 102 of the joint body tube 100. After connecting the double flange assembly 300 to the suction port of the pump body, , Since the pump body will vibrate when it is working, there is a large axial movement, which will inevitably drive the double flange assembly 300 to move axially. At this time, the axial sealing flange 321 and the plane sealing flange 311 can move along the second flange. The end 102 moves axially and telescopically, which can absorb the axial movement due to the pump body working; and the radial sealing surface 3231 of the axial sealing ring 323 presses against the outer peripheral surface of the second end 102, and the double flange assembly 300 drives the shaft When the sealing ring 323 is axially telescopically moved, the axial sealing ring 323 always forms an axial seal with the second end 102 to ensure the sealing performance of the double flange sealing type axial expansion joint.

In addition, the outer end surface of the flat sealing flange 311 is provided with a flat sealing groove 312 , and a flat sealing ring 313 is placed in the flat sealing groove 312 . It should be noted that, in this embodiment, the “inner end” and the “outer end” are relative to the double flange assembly 300 itself, and the facing surface of the axial sealing flange 321 and the plane sealing flange 311 is the inner end, The inner and outer ends of the plane sealing flange 311 are shown in direction D in FIG. 2 , and the inner and outer ends of the axial sealing flange 321 are shown in direction E in FIG. 2 .

During installation, after connecting the double flange assembly 300 to the suction port end of the pump body, the outer end surface of the flat sealing ring 313 is pressed against the suction port end of the pump body. The pipeline originally connected to the pump body is connected to the connection flange 200 of the first end 101 , and the flow direction of the fluid medium is shown in FIG. 1 .

Preferably, the axial sealing ring 323 is a rubber material member, and the plane sealing ring 313 is a rubber material member. Among them, the axial sealing ring 323 and the plane sealing ring 313 are both preferably nitrile rubber.

In this embodiment, the radial slope is provided on the axial sealing flange 321. Specifically, referring to FIGS. 2 and 4, the inner end surface of the axial sealing flange 321 is provided with an inner chamfer, so that the axial After the sealing flange 321 and the plane sealing flange 311 are connected, there is an axial sealing ring groove 322 for the axial sealing ring 323 to be placed therebetween. On axial seal groove 322.

The inner end face of the plane sealing flange 311 and the radial inclined surface enclose an axial sealing ring groove 322. As shown in FIG. 4, the inner opening of the inner end face of the axial sealing flange 321 is chamfered. Therefore, the cross section of the sealing ring groove 322 is Triangular. In addition, the axial sealing ring 323 is an annular sealing ring, and the cross section of the axial sealing ring 323 is triangular, so that it can better match the sealing ring groove 322 . In addition, the radial inclined surface of the axial sealing ring 323 is radially inward and pressed against the outer peripheral surface of the second end portion 102 .

In some other embodiments, an inner chamfer may also be provided on the inner end surface of the plane sealing flange 311 to form an axial sealing ring groove, which can be understood as the radial inclined surface is provided on the plane sealing flange 311 .

In some other embodiments, an inner chamfer can also be set on the inner end face of the axial sealing flange 321 and the inner end face of the plane sealing flange 311. After the two are connected, an axial sealing ring groove can also be formed, which can be understood as a shaft. Both the face seal flange 321 and the flat seal flange 311 have radial slopes.

In this embodiment, the inner chamfer of the inner end surface of the axial sealing flange 321 is 45°. In other embodiments, other angles may be selected, or rounded corners may be provided.

Specifically, the axial sealing flange 321 and the flat sealing flange 311 are connected by several bolts, so that the inner end surface of the flat sealing flange 311 and the radial inclined surface clamp the corresponding side surfaces of the axial sealing ring 323 together. It can be understood that the axial sealing ring 323 with a triangular cross-section is more stable during the axial movement of the second end portion. For example, when the axial sealing ring groove 322 moves to the outer end of the second end portion 102, The radial slope on the axial sealing ring groove 322 pushes the axial sealing ring 323 to move. When the axial sealing ring groove 322 moves toward the inner end of the second end portion 102 , the inner end face of the flat sealing flange 311 pushes the axial sealing ring 323 to move. , while the radial sealing surface 3231 of the axial sealing ring 323 is always pressed against the second end portion 102 to ensure sealing.

In addition, both the axial sealing flange 321 and the plane sealing flange 311 are provided with a plurality of bolt holes 324 for bolts to pass through. During installation, the axial sealing flange 321 and the plane sealing flange 311 are connected and installed together with the flange at the suction port end of the pump body.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and can also be made within the scope of knowledge possessed by those of ordinary skill in the technical field without departing from the purpose of the present invention. Various changes.

Claims (10)

1. An axial expansion joint of the double-flange sealing type, characterized in that: comprises that

The connector comprises a connector body pipe (100), wherein a first end part (101) and a second end part (102) are respectively formed at two ends of the connector body pipe (100);

a double-flange assembly (300), wherein the double-flange assembly (300) comprises an axial sealing flange (321) and a plane sealing flange (311) which are connected, the axial sealing flange (321) and the plane sealing flange (311) are sleeved on the second end portion (102), an axially telescopic gap is formed between the axial sealing flange (321) and the second end portion (102), and an axially telescopic gap is formed between the plane sealing flange (311) and the second end portion (102); and

a seal assembly comprising an axial seal ring (323) between the axial seal flange (321) and the planar seal flange (311), the axial seal ring (323) having a radial seal surface (3231) that presses against the outer peripheral surface of the second end portion (102), the axial seal flange (321) and/or the planar seal flange (311) having a radial taper such that the radial seal surface (3231) of the axial seal ring (323) presses against the outer peripheral surface of the second end portion (102).

2. A double-flange-seal-type axial expansion joint according to claim 1, wherein: an inner opening chamfer is formed in the end face of the inner side of the axial sealing flange (321), so that an axial sealing ring groove (322) for placing the axial sealing ring (323) is formed between the axial sealing flange (321) and the plane sealing flange (311) after the axial sealing flange (321) is connected with the plane sealing flange (311), the axial sealing ring groove (322) faces the second end portion (102), and the radial inclined plane is arranged on the axial sealing ring groove (322).

3. A double-flange-seal-type axial expansion joint according to claim 2, wherein: the axial sealing ring groove (322) is formed by enclosing the end face of the inner side of the plane sealing flange (311) and the radial inclined plane.

4. A double flange seal type axial expansion joint according to claim 3, wherein: the axial sealing ring (323) is an annular sealing ring, and the cross section of the axial sealing ring (323) is triangular.

5. The double flange seal type axial expansion joint as claimed in claim 4, wherein: the axial sealing flange (321) is connected with the plane sealing flange (311) through a plurality of bolts, so that the end surface of the inner side of the plane sealing flange (311) and the radial inclined surface clamp the corresponding side surface of the axial sealing ring (323) together.

6. The double flange seal type axial expansion joint as claimed in claim 5, wherein: the axial sealing flange (321) and the plane sealing flange (311) are both provided with a plurality of bolt holes (324) for the bolts to pass through.

7. A double-flange-seal-type axial expansion joint according to any one of claims 1 to 6, wherein: the outer side end face of the plane sealing flange (311) is provided with a plane sealing groove (312), and a plane sealing ring (313) is placed in the plane sealing groove (312).

8. The double flange seal type axial expansion joint as claimed in claim 7, wherein: after the double-flange component (300) is connected to the suction inlet end of the pump body, the outer side end face of the planar sealing ring (313) is pressed against the suction inlet end of the pump body.

9. The double flange seal type axial expansion joint as claimed in claim 7, wherein: the axial sealing ring (323) is a rubber material component, and the plane sealing ring (313) is a rubber material component.

10. A double-flange-seal-type axial expansion joint according to any one of claims 1 to 6, wherein: a connecting flange (200) is welded on the first end portion (101).

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