A flange connection device capable of quick positioning

Abstract

The application discloses a flange connecting device capable of fast positioning, which is composed of a male union flange, a female union flange and a wing-shaped nut assembly. The male union flange is composed of a flange plate, a male union positioning ring and a male union joint; the female union flange is mainly composed of a female union flange plate, female union threads and a female union joint; the flange plate connects the union flanges and pipeline flanges together through bolts; the wing-shaped nut assembly is composed of three identical wing-shaped nut assemblies, which are assembled into a wing-shaped nut through bolts, and the male union flange and the female union flange are connected together. The device adopts the structural design of the combination of the flange plate and the union, can guarantee the accurate alignment of the threaded holes in the process of connecting the petroleum pipeline, realizes the fast positioning of the petroleum pipeline connection and improves the installation efficiency.

Description

Technical Field

[0001] This invention relates to a flange connection device in the field of pipe connection devices, and more particularly to a flange connection device that can be quickly positioned. Background Technology

[0002] In oil transportation equipment, the use of flanges to connect oil pipelines is commonplace. Typical flanges are circular flat surfaces, connected to the oil pipeline via threads or welding. During use, a gasket is placed between the flanges, and then the two flanges are secured together with bolts. However, in practical applications, the threaded holes on the threaded or welded flanges often malfunction.

[0003] Chinese patent CN208951476U discloses a "Quick Connection Device for Petrochemical Pipeline Flanges," comprising two symmetrical clamping plates, each clamping plate having a sleeve plate welded to it. Two symmetrical flanges are installed between the two sleeve plates, and each flange has an integrally formed sleeve shaft. A pressure plate is welded to the end of each sleeve plate away from the clamping plates. A collar is fitted onto the sleeve shaft of one of the flanges, and two symmetrical arc-shaped protrusions are welded to the end of the collar near the pressure plate. A connecting mechanism is installed on the end of each sleeve plate near the pressure plate. The connecting mechanism includes a kit, a slide rod, a movable cavity, a spring, a stop block, and a handle. A kit is welded to the end of each sleeve plate near the pressure plate. A movable cavity is formed on the sleeve plate near the kit, and a slide rod is slidably connected within the movable cavity. Both ends of the slide rod penetrate the kit and the sleeve plate respectively. A handle is welded to the end of the slide rod penetrating the kit. A stop block is welded to the rod body of the slide rod within the movable cavity. A spring is welded to the stop block and the inner wall of the kit, and the spring is sleeved on the slide rod. Multiple locating pins are welded to one end of the collar, and multiple flange holes are provided on both flanges. The locating pins correspond one-to-one with the flange holes, and the locating pins on the collar can be inserted into the corresponding flange holes to prevent the flanges from shifting vertically. In use, the collar is pushed to slide on the flange's shaft, and the locating pins are inserted into the corresponding flange holes. The two clamping plates are then fitted onto the two flanges. Simultaneously, the two handles are pulled, causing the arc-shaped groove on the pressure plate to pass through the arc-shaped protrusion on the collar, so that the arc-shaped groove fits onto the arc-shaped protrusion. Releasing the handles allows the sliding rod to return to its original position under the elastic force of the spring, and the sliding rod is inserted into the slot of the arc-shaped protrusion, thus stabilizing the two flanges.

[0004] The positioning of the above invention mainly relies on the positioning pin inserted into the threaded holes of the two flanges to achieve, and can play a positive role in the connection of the sequentially welded pipeline flanges. However, in the field long pipeline connection, in order to improve the work efficiency, the pipeline is often segmented and welded, and then the flanges are connected in sequence. In this case, the threaded holes on the welded flange plate cannot be aligned, and it is necessary to disassemble and reassemble the flange plate or use other large equipment to continuously adjust the rotation angle of the flange plate. Especially for some large pipelines, the adjustment operation of the misaligned threaded holes is relatively complex, and many times of adjustment, disassembly and assembly are often required to meet the requirements, which will consume a lot of time and manpower. Therefore, how to quickly and accurately position during the pipeline connection process to ensure the alignment of the threaded holes is of great significance to improve the installation efficiency of the oil pipeline. SUMMARY

[0005] The purpose of the present application is to solve the problems existing in the prior art, and to provide a flange connecting device capable of fast positioning, which can quickly and accurately align the threaded holes on the flange plate during the installation of the oil pipeline, and improve the installation efficiency.

[0006] In order to achieve the above object, the present application adopts the following design scheme: a flange connecting device capable of rapid positioning, which is mainly composed of a male flange, a female flange and a wing-shaped nut assembly; the male flange is composed of a male flange disc, a male positioning ring and a male joint, and the male positioning ring is located between the male joint and the male flange disc; the female flange is composed of a female flange disc, a female thread and a female joint, and the female thread is located between the female joint and the female flange disc; the wing-shaped nut assembly comprises at least two wing-shaped nut assembly bodies, each wing-shaped nut assembly body is in the form of a ring body, and both ends of each wing-shaped nut assembly body are provided with fixed wings; a plurality of wing-shaped nut assembly bodies are fixedly connected by the adjacent fixed wings to form a ring-shaped sealed wing-shaped nut assembly; an inner thread and a positioning groove are arranged on the inner circumferential surface of the wing-shaped nut assembly after being spliced; the inner thread is in rotational cooperation with the female thread, and the positioning groove is in rotational cooperation with the male positioning ring; a first O-shaped ring-shaped sealing groove is arranged on the outer side of the inner thread of the wing-shaped nut assembly, and a second O-shaped ring-shaped sealing groove is arranged on the outer side of the positioning groove of the wing-shaped nut assembly; a third O-shaped ring-shaped sealing groove is arranged between the male positioning ring and the male flange disc of the male flange, and a fourth O-shaped ring-shaped sealing groove is arranged between the female thread and the female flange disc of the female flange; the first O-shaped ring-shaped sealing groove arranged in the wing-shaped nut assembly is correspondingly matched with the fourth O-shaped ring-shaped sealing groove arranged on the female flange, and a third O-shaped ring-shaped sealing ring is arranged in the matched first O-shaped ring-shaped sealing groove and fourth O-shaped ring-shaped sealing groove; the second O-shaped ring-shaped sealing groove arranged in the wing-shaped nut assembly is correspondingly matched with the third O-shaped ring-shaped sealing groove arranged on the male flange, and a first O-shaped ring-shaped sealing ring is arranged in the matched second O-shaped ring-shaped sealing groove and third O-shaped ring-shaped sealing groove; a fifth O-shaped ring-shaped sealing groove is arranged on the outer side end surface of the male flange disc; a sixth O-shaped ring-shaped sealing groove is arranged on the outer side end surface of the female flange disc; the female joint is tightly matched with the male joint; a seventh O-shaped ring-shaped sealing groove and a second O-shaped ring-shaped sealing ring are arranged at the matched end surface to realize sealing; inner convex edges are arranged on both end surfaces of the wing-shaped nut assembly after being spliced, and the inner convex edges are respectively in limiting cooperation with the male positioning ring and the male joint of the male flange, and the female thread and the female joint of the female flange.

[0007] The number of the wing-shaped nut assembly bodies is three.

[0008] The plurality of wing-shaped nut assembly bodies are connected together by bolt connection pairs.

[0009] The present application has the advantages that the structure design combining the flange disc and the flange can ensure the independent positioning of the two flange discs during the connection of the oil pipeline, accurately align the threaded holes, realize the rapid positioning of the oil pipeline connection, and improve the installation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 Flange connection device of an embodiment of the present application;

[0011] Figure 2 Public by the flange structure diagram of an embodiment of the present application;

[0012] Figure 3 Public by the flange structure diagram of an embodiment of the present application;

[0013] Figure 4 Wing nut assembly structure diagram of an embodiment of the present application;

[0014] Figure 5 Wing nut assembly structure diagram of an embodiment of the present application.

[0015] In the figure: 1. Public by the flange, 101. Public by the flange plate, 102. Fifth O-ring groove, 103. Third O-ring groove, 104. Public by the positioning ring, 105. Public by the joint, 106. First threaded hole, 2. First O-ring, 3. Wing nut assembly, 301. Wing nut assembly body, 302. First O-ring groove, 303. Second threaded hole, 304. Internal thread, 305. Positioning groove, 306. Second O-ring groove, 4. Second O-ring, 5. Third O-ring, 6. Mother by the flange, 601. Mother by the flange plate, 602. Sixth O-ring groove, 603. Third threaded hole, 604. Fourth O-ring groove, 605. Mother by the thread, 606. Mother by the joint, 7. Bolt connection pair. DETAILED DESCRIPTION

[0016] The present application will be further described below in conjunction with the accompanying drawings:

[0017] Embodiment 1

[0018] Referring to the accompanying drawings Figure 1 A flange connection device that can be quickly positioned is mainly composed of a public by the flange 1, a mother by the flange 6 and a wing nut assembly 3. Among them:

[0019] Referring to the accompanying drawings Figure 2 The public by the flange 1 is composed of a public by the flange plate 101, a public by the positioning ring 104 and a public by the joint 105, and the public by the positioning ring 104 is located between the public by the joint 105 and the public by the flange plate 101. Referring to the accompanying drawings Figure 3 The mother by the flange 6 is composed of a mother by the flange plate 601, a mother by the thread 605 and a mother by the joint 606, and the mother by the thread 605 is located between the mother by the joint 606 and the mother by the flange plate 601. Referring to the accompanying drawings Figure 5The winged nut assembly 3 comprises at least two winged nut assembly bodies 301, each of which is a ring body with fixed wings at both ends. The plurality of winged nut assembly bodies 301 are fixedly connected to form a ring-shaped sealed winged nut assembly 3 through the adjacent fixed wings thereof. The inner circumferential surface of the winged nut assembly 3 after splicing is provided with an internal thread 304 and a positioning groove 305, wherein the internal thread 304 is in rotational cooperation with the female nut thread 605, and the positioning groove 305 is in rotational cooperation with the male nut positioning ring 104.

[0020] The implementation of the above embodiment is premised on high machining precision of each component and effective sealing therebetween.

[0021] Embodiment 2

[0022] On the basis of embodiment 1, in order to further improve the sealing performance between each component, a first O-ring groove 302 is arranged outside the internal thread 304 of the inner circumferential surface of the winged nut assembly 3, and a second O-ring groove 306 is arranged outside the positioning groove 305; correspondingly, a third O-ring groove 103 is arranged between the male nut positioning ring 104 and the male nut flange plate 101 of the male nut flange 1, and a fourth O-ring groove 604 is arranged between the female nut thread 605 and the female nut flange plate 601 of the female nut flange 6; the second O-ring groove 306 arranged in the winged nut assembly 3 corresponds to and cooperates with the third O-ring groove 103 on the male nut flange 1, and a first O-ring 2 is arranged in the cooperating second O-ring groove 306 and third O-ring groove 103; the first O-ring groove 302 arranged in the winged nut assembly 3 corresponds to and cooperates with the fourth O-ring groove 604 on the female nut flange 6, and a third O-ring 5 is arranged in the cooperating first O-ring groove 302 and fourth O-ring groove 604.

[0023] Further, a fifth O-ring groove 102 is arranged on the outer side end surface of the male nut flange plate 101, a sixth O-ring groove 602 is arranged on the outer side end surface of the female nut flange plate 601, and a seventh O-ring groove is arranged at the joint end surface of the female nut joint 606 and the male nut joint 105, and a second O-ring 4 is arranged for sealing.

[0024] The two end surfaces of the winged nut assembly 3 after splicing are provided with inner convex edges, which respectively form limiting cooperation with the male nut positioning ring 104 and the male nut joint 105 of the male nut flange 1, and the female nut thread 605 and the female nut joint 606 of the female nut flange 6.

[0025] Embodiment 3

[0026] Further to embodiment 2, the number of wing nut assembly bodies 301 is 3. The plurality of wing nut assembly bodies 301 are connected together through the second threaded holes 303 and the bolt connection pairs 7.

[0027] The male and female flange plates 101 and 601 are each provided with a plurality of first threaded holes 106 and third threaded holes 603.

[0028] Typical embodiment 4

[0029] With reference to the accompanying drawings Figures 1-5 A flange connection device for petroleum pipelines that can be quickly positioned, mainly composed of a male flange 1, a female flange 6, and a wing nut assembly 3.

[0030] The male flange 1 is composed of a male flange plate 101, a male flange positioning ring 104, and a male flange joint 105. The male flange plate 101 is provided with a fifth O-shaped ring-shaped sealing groove 102 on the outer side end face, and the end face is distributed with eight first threaded holes 106. The first threaded holes 106 are used to connect the male flange plate 101 and the petroleum pipeline flange plate together through bolt connection.

[0031] The male flange positioning ring 104 is located between the male flange joint 105 and the male flange plate 101, and is connected with the wing nut assembly 3, which can not only position the male flange 1, but also accurately align the first threaded holes 106 on the male flange plate 101 by rotating the male flange plate 101. The upper part of the male flange positioning ring 104 is provided with a third O-shaped ring-shaped sealing groove 103, which can prevent oil leakage when the male flange 1 is connected with the wing nut assembly 3.

[0032] The female flange 6 is composed of a female flange plate 601, a female flange thread 605, and a female flange joint 606. The female flange plate 601 is provided with a sixth O-shaped ring-shaped sealing groove 602 on the outer side end face, and the outer side end face is distributed with eight third threaded holes 603, which are used to connect the female flange plate 601 and the petroleum pipeline flange plate together through bolt connection.

[0033] The female flange thread 605 is located between the female flange joint 606 and the female flange plate 601, and is connected with the wing nut assembly 3, which can not only position the female flange 6, but also accurately align the third threaded holes 603 on the female flange plate by rotating the female flange 6.

[0034] The flange connecting device for petroleum pipeline can be quickly positioned. The male flange 1, the female flange 6 and the wing nut assembly 3 are installed together. The female flange joint 606 is tightly matched with the male flange joint 105, and the end surface is sealed by the second O-shaped ring seal 4. The upper part of the female flange thread 605 has the fourth O-shaped ring seal groove 604, so that the petroleum leakage is avoided when the female flange 6 is connected with the wing nut assembly 3.

[0035] The wing nut assembly 3 is mainly composed of the wing nut assembly body 301 and the bolt connecting pair 7. The wing nut assembly body 301 is a ring body with an arc of 120°, and two fixed wings are arranged at two ends of the ring body. The second threaded holes 303 are arranged in the fixed wings. The three wing nut assembly bodies 301 are connected by the bolt connecting pair 7 to form the wing nut assembly 3, and the internal threads 304 are formed by the internal combination.

[0036] The inner side of the wing nut assembly body 301 has the second O-shaped ring seal groove 306 and the first O-shaped ring seal groove 302, which are matched with the third O-shaped ring seal groove 103 and the fourth O-shaped ring seal groove 604 in the male flange 1 and the female flange 6 respectively, so as to seal.

[0037] The inner side of the wing nut assembly body 301 has the positioning groove 305, which is matched with the male flange positioning ring 104. The male flange 1 can be accurately positioned and fixed, and the first threaded hole 106 can be accurately aligned when the male flange plate 101 is connected with the petroleum pipeline flange plate by rotating the male flange 1.

[0038] The inner side of the wing nut assembly body 301 has the internal thread 304, which is matched with the female flange thread 605. The female flange 6 can be positioned and fixed, and the third threaded hole 603 can be accurately aligned when the female flange plate 601 is connected with the petroleum pipeline flange plate by rotating the female flange 6.

Claims

1. A quick positioning flange connection device, mainly composed of a male flange, a female flange and a wing nut assembly; characterized in that: The male by the flange is composed of a male by flange plate, a male by positioning ring and a male by joint, and the male by positioning ring is located between the male by joint and the male by flange plate; the female by flange is composed of a female by flange plate, a female by thread and a female by joint, and the female by thread is located between the female by joint and the female by flange plate; the wing nut assembly comprises at least two wing nut assembly bodies, each of which is annular and has fixed wings at both ends, and the plurality of wing nut assembly bodies are fixedly connected to form a ring-shaped sealed wing nut assembly through the adjacent fixed wings, and the inner periphery of the wing nut assembly after splicing is provided with internal threads and a positioning groove, wherein the internal threads are in rotational cooperation with the female by thread, and the positioning groove is in rotational cooperation with the male by positioning ring; a first O-shaped annular sealing ring groove is arranged outside the internal threads of the wing nut assembly, and a second O-shaped annular sealing ring groove is arranged outside the positioning groove of the wing nut assembly; a third O-shaped annular sealing ring groove is arranged between the male by positioning ring and the male by flange plate of the male by flange, and a fourth O-shaped annular sealing ring groove is arranged between the female by thread and the female by flange plate of the female by flange; the first O-shaped annular sealing ring groove arranged in the wing nut assembly is in corresponding cooperation with the fourth O-shaped annular sealing ring groove on the female by flange, and a third O-shaped annular sealing ring is arranged in the cooperating first O-shaped annular sealing ring groove and fourth O-shaped annular sealing ring groove; the second O-shaped annular sealing ring groove arranged in the wing nut assembly is in corresponding cooperation with the third O-shaped annular sealing ring groove on the male by flange, and a first O-shaped annular sealing ring is arranged in the cooperating second O-shaped annular sealing ring groove and third O-shaped annular sealing ring groove; the outer side end surface of the male by flange plate is provided with a fifth O-shaped annular sealing ring groove; the outer side end surface of the female by flange plate is provided with a sixth O-shaped annular sealing ring groove; the female by joint is tightly matched with the male by joint, and a seventh O-shaped annular sealing ring groove and a second O-shaped annular sealing ring are arranged at the matched end surface for sealing; the two end surfaces of the wing nut assembly after splicing are provided with inner convex edges, and the inner convex edges are in limiting cooperation with the male by positioning ring and the male by joint of the male by flange, and the female by thread and the female by joint of the female by flange.

2. The quickly positionable flange connection device of claim 1, wherein: The number of the wing nut assembly bodies is three.

3. A quick positionable flange coupling device according to claim 1 or 2, characterised in that: The plurality of wing nut assembly bodies are connected together through bolt connection pairs.

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