CN113932077A

CN113932077A - Clamp type connector for underwater vertical pipeline

Info

Publication number: CN113932077A
Application number: CN202111226490.3A
Authority: CN
Inventors: 贾鹏; 王宇角; 王刚; 运飞宏; 王向宇; 王洪海; 庞楠; 弓海霞; 张岚
Original assignee: Harbin Engineering University
Current assignee: Harbin Engineering University
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-01-14

Abstract

The invention provides a clamp type connector for an underwater vertical pipeline, which comprises an upper flange, a lower flange, a clamp and a connecting bolt which are respectively welded on the end heads of the connected pipeline, wherein the combined end surface of the lower flange and the upper flange is provided with an O-shaped ring groove, an O-shaped sealing ring is arranged in the O-shaped ring groove and is in interference fit with the groove, the upper end of the O-shaped ring is pressed and mounted by the large end surface of the upper flange, the flange outside all adopts echelonment structure down, and the first section ladder of upper and lower flange is the circular conical surface, and the clamp includes unthreaded hole clamp and screw hole clamp, and unthreaded hole clamp, screw hole clamp are semi-cylindrical hollow structure, and there is ear structure both sides, hollow structure's last lower wall respectively with go up lower flange circular conical surface contact, unthreaded hole clamp ear structure division unthreaded hole, screw hole clamp ear structure division screw hole, connecting bolt pass unthreaded hole clamp unthreaded hole and screw hole clamp screw thread structure cooperation. The underwater vertical pipeline connector can solve the problems that the existing underwater vertical pipeline connector is complex in structure and time-consuming and labor-consuming to install.

Description

Clamp type connector for underwater vertical pipeline

Technical Field

The invention relates to a pipeline connecting device, in particular to a clamp type connector for an underwater vertical pipeline, and belongs to the field of underwater pipeline connectors.

Background

In the process of underwater production operation, the process of underwater pipeline transportation is a hub for smooth engineering. Underwater pipeline connection is one of the important links in the design of underwater production systems, and is mainly applied to connecting or repairing underwater pipelines. At present, the domestic underwater pipeline connection technology is still in a starting stage, underwater pipeline connectors and machines are researched, the underwater pipelines can be quickly connected, and time and cost are saved for engineering.

The current ways of realizing underwater pipeline connection include pipeline welding, bolt flange connection, clamping connection, claw connection, clamp connection and the like. Among them, the bolt flange type connection is most widely used, but the bolt flange connection requires complicated centering and bolt pre-tightening processes, which greatly increases the offshore operation period. The clamp type connection mainly clamps the upper flange and the lower flange through a clamp structure, and the clamp connection is less in number than the traditional bolt flange connection bolts, so that the installation mode is simpler and faster, and the reliability is higher. The invention belongs to a clamp type connection.

Disclosure of Invention

The invention aims to provide a clamp type connector for an underwater vertical pipeline, which is a pipeline connector for realizing vertical distribution pipeline connection through clamp connection and can solve the problems of complex structure and time and labor waste in installation of the conventional underwater vertical pipeline connector.

The purpose of the invention is realized as follows: including welding the last flange and the lower flange on being connected the pipeline end respectively, O type sealing washer, the unthreaded hole clamp, the screw hole clamp, connecting bolt and profile of tooth packing ring, the combination terminal surface of lower flange and last flange is provided with O type circle slot, set up O type sealing washer and slot interference fit in the O type circle slot, O type circle upper end is compressed tightly by the big terminal surface of last flange, the echelonment structure is all adopted in the upper and lower flange outside, the first section ladder of upper and lower flange is the conical surface, the unthreaded hole, the screw hole clamp is half columnar order hollow structure, there is ear structure both sides, hollow structure's upper and lower wall respectively with upper and lower flange circular conical surface contact, unthreaded hole is opened to unthreaded hole clamp structure, screw hole ear clamp unthreaded hole and screw hole clamp screw structure cooperation are passed to connecting bolt.

Furthermore, the stepped structure of the upper flange and the lower flange comprises a first conical surface which is in contact with the hoop, a first arc for relieving stress concentration, a second conical surface for increasing the bending moment bearing capacity of the structure, a second arc for relieving stress concentration and a bevel surface which is matched with the connected pipeline for welding.

Furthermore, unthreaded hole clamp main part is outside sphere, both sides have the semi-cylindrical hollow structure of ear structure, and hollow structure's upper and lower wall is the inclined plane, and ear structure opens has the diameter to be slightly greater than the unthreaded hole of connecting bolt.

Furthermore, the clamp body with the threaded hole is of a semi-cylindrical hollow structure with an outer spherical surface and lug-shaped structures on two sides, the upper wall and the lower wall of the hollow structure are inclined planes, and the lug-shaped structures are provided with threaded holes matched with the connecting bolts in a threaded mode.

Further, a tooth washer is padded between the tie bolt head and the unthreaded hole collar lug structure.

Compared with the prior art, the invention has the beneficial effects that: the underwater vertical pipeline is connected in a mode that the clamps are separated from two sides, and the automatic centering function can be realized through the matching of the clamps and the conical surfaces of the flanges; the set of connecting equipment only needs to pre-tighten a pair of bolts, so that the connecting speed is higher than that of the traditional bolt-flange connection; according to the invention, the composite bearing of the axial force and the radial bending moment of the underwater vertical conveying system is realized through the stepped structure on the outer side of the flange and the hollow structure of the clamp, so that the reliability of connection is ensured; the O-shaped sealing ring made of the fluororubber material is adopted, so that the sealing performance is ensured, the sealing part is more corrosion-resistant, and the service life of the system is prolonged; the invention adopts the tooth-shaped gasket, improves the anti-loosening performance of the connecting bolt and improves the shock and vibration resistance of the system.

Drawings

Fig. 1 is an exploded view of a three-dimensional structure of the present invention.

Fig. 2 is a sectional view of a three-dimensional structure in a state where the installation of the present invention is completed.

Fig. 3a and 3b are a perspective view and a cross-sectional view, respectively, of the upper flange.

Fig. 4 a-4 c are perspective, sectional and partially enlarged views of the structural schematic of the lower flange.

Fig. 5 is a perspective view of the structure of the unthreaded clamp.

Fig. 6 is a perspective view of a threaded hole clip.

Detailed Description

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

With reference to fig. 1-6, the connector structure of the present invention is substantially symmetrical. The connecting device consists of an upper flange 6 and a lower flange 7 which are respectively welded on the end heads of the connected pipelines, an O-shaped sealing ring 5, a unthreaded hole hoop 2, a threaded hole hoop 1, a connecting bolt 4 and a tooth-shaped gasket 3.

The upper flange is of a hollow stepped cylinder type and comprises a large end face 61, an inner hole 62 and an outer stepped structure 63. The large end face 61 is an end face matched with the lower flange 7 and used for extruding the O-shaped ring 5 for sealing; the inner hole is used for conveying target mineral aggregate. The stepped structure includes, from top to bottom, a first conical surface 631, a first arc 632, a second conical surface 633, a second arc 634, and a bevel surface 635. The first conical surface 631 is in contact with the clamp, and is used for positioning the clamp, centering the flange and transmitting load; the first circular arc 632 and the second circular arc 634 are used for relieving stress concentration carried by the structure; the second conical surface 633 is used for improving the capability of the structure for bearing bending moment load; the bevel face 635 is used for aligning and welding with a connected pipeline.

The lower flange is of a hollow stepped cylinder type and comprises a large end face 71, a groove 72, an inner hole 73 and an outer stepped structure 74. The large end face 71 is an end face matched with the upper flange 6; the groove 72 is formed in the center of the large end face 71 and used for mounting the O-shaped ring 5; the inner bore 73 is used for conveying the target mineral aggregate. The stepped structure includes, from top to bottom, a first conical surface 731, a first arc 732, a second conical surface 733, a second arc 734, and a bevel surface 735. The first conical surface 731 is in contact with the clamp, and is used for positioning the clamp, centering the flange and transmitting load; the first arc 732 and the second arc 734 are used for relieving stress concentration borne by the structure; the second conical surface 733 is used for improving the capability of the structure for bearing bending moment load; the bevel face 735 is used for alignment and welding with the pipe being joined.

The unthreaded hole clamp main part is semi-cylindrical hollow structure, and the surface is the sphere, and both sides have two ear structures. The upper wall and the lower wall of the hollow structure are respectively contacted with the conical surfaces of the upper flange and the lower flange and are used for positioning the hoop, centering the flanges and transmitting load; the ear-shaped structure is provided with a light hole, and the connecting bolt penetrates through the light hole and is used for connecting the clamp and the connecting bolt.

The threaded hole clamp main body is of a semi-cylindrical hollow structure, the outer surface of the threaded hole clamp main body is a spherical surface, and two lug-shaped structures are arranged on two sides of the threaded hole clamp main body. The upper wall and the lower wall of the hollow structure are respectively contacted with the conical surfaces of the upper flange and the lower flange and are used for positioning the hoop, centering the flanges and transmitting load; the lug-shaped structure is provided with a threaded hole which is matched with the threaded structure of the connecting bolt and used for connecting the hoop with the connecting bolt.

The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:

the installation process comprises the following steps: fixing a welding part of the lower flange 7 and a connected pipeline, and placing an O-shaped sealing ring 5 in a groove of the lower flange 7; the welding piece of the upper flange 6 and the connected pipeline is put down until the end face of the upper flange 6 is contacted with the O-shaped sealing ring 5; placing the unthreaded hole clamp 2 and the threaded hole clamp 1 on special connecting machines at two sides, pushing the clamp to move towards the middle by a connecting machine hydraulic cylinder until the unthreaded hole clamp 2 and the threaded hole clamp 1 clamp the upper flange 6 and the lower flange 7, and realizing the positioning of the clamp and the centering of the flanges in the process; then, an electric wrench is used for enabling a connecting bolt 4 with a tooth-shaped gasket 3 to penetrate through the unthreaded hole of the unthreaded hole clamp 2 and to be matched with the threads of the threaded hole clamp 1 to enable the two clamps to be pre-tightened; and finally, the connected pipeline is lowered, and the installation operation is finished.

And (3) dismantling: a hydraulic cylinder of a special connecting machine tool is driven to ensure that the machine tool is fully contacted with the unthreaded hole clamp 2 and the threaded hole clamp 1; removing the connecting bolt 4 with the tooth-shaped washer 3 from the hoop by using an electric wrench; a hydraulic cylinder of a special connecting machine tool is driven to remove the unthreaded hole clamp 2 and the threaded hole clamp 1; and respectively hoisting the welding parts of the upper flange 6 and the connected pipeline and the welding parts of the lower flange and the connected pipeline away from the working area, and finishing the dismantling operation.

Claims

1. The utility model provides an underwater vertical pipeline clamp formula connector, includes the last flange of welding respectively on being connected the pipeline end and lower flange, clamp, connecting bolt, characterized by: the combination terminal surface of lower flange and last flange is provided with O type circle slot, set up O type sealing washer and slot interference fit in the O type circle slot, O type circle upper end is compressed tightly by the big terminal surface of last flange, the echelonment structure is all adopted in the upper and lower flange outside, the first section ladder of upper and lower flange is the circular conical surface, the clamp includes unthreaded hole clamp and screw hole clamp, unthreaded hole clamp, screw hole clamp are half column type hollow structure, there is ear structure both sides, hollow structure's upper and lower wall respectively with upper and lower flange circular conical surface contacts, unthreaded hole clamp ear structure trompil unthreaded hole, screw hole clamp ear structure trompil screw hole, connecting bolt passes unthreaded hole clamp unthreaded hole and screw hole clamp screw thread structure cooperation.

2. The underwater vertical pipe clamp connector of claim 1, wherein: the stepped structure of the flange and the lower flange comprises a first conical surface which is in contact with the hoop, a first arc relieving stress concentration, a second conical surface which increases the bending moment bearing capacity of the structure, a second arc relieving stress concentration and a bevel surface which is matched with a connected pipeline for welding.

3. The underwater vertical pipe clamp connector of claim 1, wherein: the hole clamp main part is the semi-cylindrical hollow structure that there is the ear structure outside sphere, both sides, and hollow structure's upper and lower wall is the inclined plane, and the ear structure is opened has the diameter to be slightly greater than connecting bolt's unthreaded hole.

4. The underwater vertical pipe clamp connector of claim 1, wherein: the clamp body of the threaded hole is a semi-cylindrical hollow structure with an outer spherical surface and two sides provided with lug structures, the upper wall and the lower wall of the hollow structure are inclined planes, and the lug structures are provided with threaded holes matched with the threads of the connecting bolts.

5. The underwater vertical pipe clamp connector of claim 1, wherein: and a tooth-shaped gasket cushion is padded between the bolt head of the connecting bolt and the lug-shaped structure of the unthreaded hole clamp.