CN212509937U

CN212509937U - Pressure test flange

Info

Publication number: CN212509937U
Application number: CN202021089441.0U
Authority: CN
Inventors: 赵宏伟; 郭立山; 任文松
Original assignee: Panjin Liaohe Oilfield Taicheng Industrial Co ltd
Current assignee: Panjin Liaohe Oilfield Taicheng Industrial Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-02-09
Anticipated expiration: 2030-06-12

Abstract

The utility model provides a pressure testing flange, including flange body and the flange packing ring of supporting use, the flange body is circular, the both sides of flange body divide into pressure-bearing inner wall and pressure-bearing outer wall, cast joint has circular pressure-bearing lug on the pressure-bearing inner wall, circular pressure-bearing lug's cast joint has the cross strengthening rib on the surface, be equipped with two positioning groove on the pressure-bearing inner wall, two positioning groove symmetry set up in circular pressure-bearing lug's both sides, it runs through around the center pin partition on the flange body and is equipped with six connecting holes, and is a plurality of the connecting hole is located one by one circular pressure-bearing lug and maximum diameter annular strengthening rib periphery. The utility model discloses the loaded down with trivial details step that has reduced the use blind plate and the probability that has reduced gas leakage to the bearing capacity of pressure testing flange has been strengthened, and has kept better leakproofness with the help of the flange packing ring that forms a complete set used.

Description

Pressure test flange

Technical Field

The utility model mainly relates to the technical field of flanges, concretely relates to pressure testing flange.

Background

A Flange (Flange), also known as a Flange collar or Flange. The flange is a part for connecting the shafts and is used for connecting pipe ends; there are also flanges on the inlet and outlet of the equipment for the connection between two pieces of equipment, such as reducer flanges. The flange connection or flange joint is a detachable connection which is formed by connecting a flange, a gasket and a bolt with each other to form a group of combined sealing structures. The pipeline flange is a flange for piping in a pipeline device, and is used on equipment to be an inlet and outlet flange of the equipment. The flanges are provided with holes, and the two flanges are tightly connected through bolts. The flanges are sealed with gaskets. The flange is divided into a threaded connection (screw thread connection) flange, a welding flange and a clamping flange. The flanges are used in pairs, the low-pressure pipeline can be screwed with the flanges, and the flanges are welded under the pressure of more than four kilograms. And a sealing gasket is arranged between the two flanges and then is fastened by bolts. The flanges of different pressures have different thicknesses and they use different bolts. When the water pump and the valve are connected with a pipeline, the parts of the equipment and equipment are also made into corresponding flange shapes, which are also called flange connection. The connecting parts which are connected by using bolts at the peripheries of two planes and are closed at the same time are generally called flanges, and for example, the connecting parts of the ventilating duct can be called flange parts. However, the connection is only a part of equipment, such as the connection between a flange and a water pump, and the water pump is not easy to be called as a flange part. The small-sized valve can be called as a flange part.

The existing pipeline pressure test uses two flanges to connect, a solid blind plate is clamped in the middle, the mode has certain effects on pressure test, leakage test and pipeline plugging of pipeline equipment, but when the pressure test is carried out, because a gap also exists between the middle blind plate and the two flanges, the tested tightness and pressure resistance still have larger deviation.

SUMMERY OF THE UTILITY MODEL

The utility model mainly provides a pressure test flange for solve the technical problem who proposes among the above-mentioned background art.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a pressure test flange comprises a flange body and a flange gasket which is matched with the flange body for use, wherein the flange body is circular, two sides of the flange body are divided into a pressure-bearing inner wall and a pressure-bearing outer wall, a circular pressure-bearing convex block is cast-welded on the pressure-bearing inner wall, a cross-shaped reinforcing rib is cast-welded on the surface of the circular pressure-bearing convex block, two positioning grooves are arranged on the pressure-bearing inner wall, and the two positioning grooves are symmetrically arranged on two sides of the circular pressure-bearing convex block;

a plurality of annular reinforcing ribs are cast on the pressure-bearing outer wall, the diameters of the annular reinforcing ribs are different, and the annular reinforcing ribs are sequentially arranged close to the center of the pressure-bearing outer wall according to the diameters;

the inner structure of the flange gasket is divided into a pressure-resistant layer and a corrosion-resistant layer, positioning lugs are symmetrically arranged on the side wall of one side of the flange gasket, and the two positioning lugs are matched with the two positioning grooves.

Furthermore, six connecting holes are formed in the flange body in a penetrating mode around the central shaft in an equal-dividing mode, and the connecting holes are located on the circular pressure-bearing convex block and the outer periphery of the annular reinforcing rib with the largest diameter one by one.

Furthermore, an annular groove is formed in the arc side wall of the flange body, and the groove walls on the two sides of the annular groove are respectively equal to the distance between the pressure-bearing inner wall and the pressure-bearing outer wall.

Furthermore, the circle centers of the circular pressure-bearing convex block and the annular reinforcing ribs are both positioned on the central shaft of the flange body.

Furthermore, the diameter of the inner ring of the flange gasket is equal to that of the circular pressure-bearing convex block, and the diameter of the outer ring of the flange gasket is equal to that of the pressure-bearing inner wall.

Furthermore, six through-holes are arranged on the flange gasket at equal intervals one by one, the diameter of each through-hole is equal to that of each connecting hole, and the through-holes are multiple in position and are matched with the connecting holes.

Further, the intervals among a plurality of the annular reinforcing ribs are equal.

Compared with the prior art, the beneficial effects of the utility model are that:

the pressure test flange designed by the utility model has better effect for the pressure test of the pipeline equipment, reduces the complicated steps of using the blind plate and the probability of air leakage through the integrated design, utilizes two positioning grooves on the pressure-bearing inner wall and two positioning lugs designed on the matched flange gasket to better position, has stronger compression resistance and corrosion resistance, is not easy to deform and age, can be used for a plurality of times, saves materials, the circular pressure-bearing convex blocks on the pressure-bearing inner wall are matched with the inner pipe wall of the pipeline, the pressure-bearing capacity of the circular pressure-bearing convex blocks is enhanced by the aid of the design of the cross reinforcing ribs, the pressure-bearing capacity of the whole pressure-testing flange is further enhanced by the aid of the annular reinforcing ribs with different diameters on the pressure-bearing outer wall, the pressure-bearing flange is convenient to install on pipeline equipment, and good sealing performance can be kept.

The present invention will be explained in detail with reference to the drawings and specific embodiments.

Drawings

Fig. 1 is a schematic structural view of the pressure-bearing inner wall of the present invention;

fig. 2 is a schematic structural view of the pressure-bearing outer wall of the present invention;

fig. 3 is a schematic view of the external structure of the flange gasket of the present invention;

fig. 4 is a schematic view of the internal structure of the flange gasket of the present invention.

In the figure: 1. a flange body; 11. a pressure-bearing inner wall; 11a, a circular pressure-bearing bump; 11a-1, cross reinforcing ribs; 11b, positioning grooves; 12. a pressure-bearing outer wall; 12a, annular reinforcing ribs; 13. connecting holes; 14. an annular groove; 2. a flange gasket; 2a, a through hole; 2b, positioning a bump; 21. a pressure resistant layer; 22. a corrosion resistant layer.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully with reference to the accompanying drawings, in which several embodiments of the present invention are shown, but the present invention can be implemented in different forms, and is not limited to the embodiments described in the text, but rather, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the use of the term knowledge in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In a first embodiment, please refer to fig. 1-4 again, a pressure test flange includes a flange body 1 and a flange gasket 2 used in cooperation, the flange body 1 is circular, two sides of the flange body 1 are divided into a pressure-bearing inner wall 11 and a pressure-bearing outer wall 12, a circular pressure-bearing protrusion 11a is cast on the pressure-bearing inner wall 11, a cross-shaped reinforcing rib 11a-1 is cast on the surface of the circular pressure-bearing protrusion 11a, two positioning grooves 11b are arranged on the pressure-bearing inner wall 11, and the two positioning grooves 11b are symmetrically arranged on two sides of the circular pressure-bearing protrusion 11 a; a plurality of annular reinforcing ribs 12a are cast on the pressure-bearing outer wall 12, the diameters of the annular reinforcing ribs 12a are different, the annular reinforcing ribs 12a are sequentially arranged close to the center of the pressure-bearing outer wall 12 according to the diameters, and the intervals among the annular reinforcing ribs 12a are equal; the internal structure of the flange gasket 2 is divided into a pressure-resistant layer 21 and a corrosion-resistant layer 22, positioning lugs 2b are symmetrically arranged on the side wall of one side of the flange gasket 2, and the two positioning lugs 2b are matched with the two positioning grooves 11 b; the circle centers of the circular pressure-bearing convex block 11a and the annular reinforcing ribs 12a are both positioned on the central shaft of the flange body 1; the diameter of the inner ring of the flange gasket 2 is equal to that of the circular pressure-bearing convex block 11a, and the diameter of the outer ring of the flange gasket 2 is equal to that of the pressure-bearing inner wall 11. In this embodiment, a pipeline with an inner pipe wall matched with a circular pressure-bearing projection 11a is used for pressure testing, one end of the pressure-testing pipeline is tightly connected with a pressure-charging device, a flange body 1 and a flange gasket 2 matched with the pressure-bearing projection 11a are arranged at the other end, the flange gasket 2 is in a double-layer design by virtue of a pressure-resisting layer 21 with polyethylene as a main raw material and a corrosion-resisting layer 22 with asbestos rubber as a main raw material, and has the characteristics of better pressure-resisting capability, corrosion resistance and aging resistance, the flange gasket 2 is quickly matched and positioned with two positioning grooves 11b on a pressure-bearing inner wall 11 through two positioning projections 2b to prevent rotation deviation, formal pressure testing is carried out after no problem exists in pre-test pressure, the pressure in the pipeline can act on the circular pressure-bearing projection 11a, and the cross reinforcing ribs 11a-1 on the circular pressure-bearing projection 11 are matched with a plurality of annular reinforcing ribs, the flange body 1 is prevented from being easily deformed to influence the pressure test.

In the second embodiment, specifically, please refer to fig. 1 and 3 again, six connection holes 13 are formed in the flange body 1 in a penetrating manner in equal parts around the central axis, and the plurality of connection holes 13 are located on the outer peripheries of the circular pressure-bearing protrusion 11a and the annular reinforcing rib 12a with the largest diameter one by one; six through-holes 2a have been seted up to the equidistance one by one on the flange packing ring 2, and is a plurality of the diameter of through-hole 2a equals with a plurality of the diameter of connecting hole 13, and is a plurality of the position of through-hole 2a is with a plurality of the position of connecting hole 13 is identical. In this embodiment, a plurality of connecting holes 13 and through holes 2a designed correspondingly on the flange body 1 and the flange gasket 2 and a plurality of corresponding fixing holes on the pipeline are used for bolt fixing, so that the thrust caused by the internal pressure is better shared, the flange body 1 and the pipeline are connected more tightly, and the flange body and the pipeline cannot be expanded easily.

In the third embodiment, please refer to fig. 1 again, specifically, an annular groove 14 is formed on the arc-shaped side wall of the flange body 1, and the distances between the groove walls on the two sides of the annular groove 14 and the pressure-bearing inner wall 11 and the pressure-bearing outer wall 12 are equal. In this embodiment, the annular groove 14 designed on the outer ring arc wall of the flange body 1 is utilized, so that the flange body 1 has better toughness in a mechanical angle, can bear better pulling force, contributes to heat dissipation, and is convenient to take when being installed and detached.

The utility model discloses a concrete operation as follows:

firstly, the flange gasket 2 is matched and positioned by two positioning lugs 2b and two positioning grooves 11b on the flange body 1, at the moment, six connecting holes 13 are also matched with six through holes 2a, then the pressure-bearing inner wall 11 is aligned to the connecting part of one end of the pressure-testing pipeline by a plurality of bolts, so that the circular pressure-bearing lug 11a is matched with the inner wall of the pipeline, after the plurality of bolts are fastened, the other end of the pressure-testing pipeline is tightly connected with pressure charging equipment, when pressure testing is started, pressure is measured in advance, whether a gas leakage place exists or not is checked, after a fault is confirmed, normal pressure testing is carried out, the internal pressure can act on the circular pressure-bearing lug 11a, the cross reinforcing ribs 11a-1 on the circular pressure-bearing lug 11 are matched with the plurality of annular reinforcing ribs 12a on the pressure-bearing outer wall 12 to carry out pressure-resisting reinforcement, and the annular grooves 14 designed on the outer ring arc wall of the flange body 1 carry out toughness reinforcement when being subjected to pressure.

The above description of the present invention is made in conjunction with the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and the method and the technical solution of the present invention are not substantially improved or directly applied to other occasions without improvement, and are all within the protection scope of the present invention.

Claims

1. A pressure test flange comprises a flange body (1) and a flange gasket (2) which is matched with the flange body for use, and is characterized in that the flange body (1) is circular, two sides of the flange body (1) are divided into a pressure-bearing inner wall (11) and a pressure-bearing outer wall (12), a circular pressure-bearing convex block (11a) is cast on the pressure-bearing inner wall (11), a cross-shaped reinforcing rib (11a-1) is cast on the surface of the circular pressure-bearing convex block (11a), two positioning grooves (11b) are arranged on the pressure-bearing inner wall (11), and the two positioning grooves (11b) are symmetrically arranged on two sides of the circular pressure-bearing convex block (11 a);

a plurality of annular reinforcing ribs (12a) are cast on the pressure-bearing outer wall (12), the diameters of the annular reinforcing ribs (12a) are different, and the annular reinforcing ribs (12a) are sequentially arranged close to the center of the pressure-bearing outer wall (12) according to the diameters;

the inner structure of the flange gasket (2) is divided into a pressure-resistant layer (21) and a corrosion-resistant layer (22), positioning lugs (2b) are symmetrically arranged on the side wall of one side of the flange gasket (2), and the two positioning lugs (2b) are matched with the two positioning grooves (11 b).

2. The pressure test flange according to claim 1, wherein six connection holes (13) are equally arranged on the flange body (1) around the central shaft, and a plurality of the connection holes (13) are arranged on the outer periphery of the circular pressure-bearing lug (11a) and the annular reinforcing rib (12a) with the largest diameter one by one.

3. The pressure test flange according to claim 2, wherein the circular arc side wall of the flange body (1) is provided with an annular groove (14), and the groove walls on two sides of the annular groove (14) are respectively equal to the distance between the pressure-bearing inner wall (11) and the pressure-bearing outer wall (12).

4. The pressure test flange according to claim 1, wherein the circular pressure bearing projection (11a) and the circular reinforcing ribs (12a) are located on the central axis of the flange body (1).

5. The pressure test flange according to claim 2, characterized in that the diameter of the inner ring of the flange gasket (2) is equal to the diameter of the circular pressure bearing projection (11a), and the diameter of the outer ring of the flange gasket (2) is equal to the diameter of the pressure bearing inner wall (11).

6. The pressure test flange according to claim 5, wherein six through holes (2a) are formed in the flange gasket (2) one by one at equal intervals, the diameter of the through holes (2a) is equal to that of the connecting holes (13), and the positions of the through holes (2a) are matched with those of the connecting holes (13).

7. A pressure test flange according to claim 1, wherein a plurality of the annular reinforcing ribs (12a) are equally spaced.