A test device for riser spherical joints

Abstract

The present invention discloses a test device for a watertight pipe spherical joint, which specifically includes a support frame, a spherical joint suspended at the center of the support frame, a swing mechanism provided at the bottom of the support frame, the swing mechanism being connected to an end of the spherical joint away from the support frame, and a cylinder assembly being connected between the swing mechanism and the spherical joint, and the swing mechanism being driven by the cylinder assembly; the device of the present invention realizes the swinging of the lower part of the spherical joint by telescoping the lower offset cylinder, and realizes a dynamic swing performance test under pressure; and realizes the rotation of the lower part of the spherical joint by driving the drive disk through the telescoping of the lower rotating cylinder, and realizes a dynamic rotation performance test under pressure.

Description

Technical Field

[0001] The invention belongs to the field of mechanical equipment and relates to a riser spherical joint testing device. Background Art

[0002] The riser ball joint is installed atop the offshore platform riser system, primarily used in offshore drilling operations. It is a crucial component in offshore platform riser systems. It provides angular offset when there is angular misalignment between the riser and the platform, thereby reducing bending moments on the riser. Once the platform tensioner is connected to the riser, the ball joint activates, providing a certain degree of deflection to the riser. The maximum deflection angle is ±12°, and this deflection angle is controlled by mechanical limits.

[0003] The ball joint is suspended from the bottom of the offshore platform's drilling floor via a shoulder plate. Its upper flange connects to the diverter and other equipment on the platform, while its lower flange connects to the rigid pipes of the riser system. Installation on offshore platforms requires extensive connection work, requiring a successful first-pass installation. Therefore, the device must undergo comprehensive factory testing before shipment to ensure it meets operational requirements after a single installation. A test device for the watertight riser ball joint was designed to ensure performance and sealing tests are completed before shipment, ensuring smooth delivery to customers. Summary of the Invention

[0004] The purpose of the present invention is to provide a test device for a watertight pipe ball joint. The device uses a support frame to install and fix the ball joint to be tested inside, and pressurizes the inside of the ball joint through the upper pressure test hole to perform a sealing test; the ball joint is offset by using a sealing flange and an offset cylinder, and the lower part of the ball joint is rotated by using a drive plate and a rotating cylinder, thereby solving the problems of the watertight pipe ball joint test device and completing the performance test.

[0005] The technical solution adopted by the present invention is a watertight pipe spherical joint test device, which specifically includes a support frame, a spherical joint suspended at the center of the support frame, a swing mechanism provided at the bottom of the support frame, the swing mechanism is connected to the end of the spherical joint away from the support frame, and a cylinder assembly is also connected between the swing mechanism and the spherical joint, and the swing mechanism is driven by the cylinder assembly.

[0006] The present invention is also characterized in that:

[0007] The support frame includes an upper seat and a lower seat arranged horizontally, the upper seat and the lower seat are opposite and parallel, a plurality of columns are connected between the upper seat and the lower seat, a spherical joint is suspended at the bottom of the upper seat through a flange, and the spherical joint is located between the upper seat and the lower seat, and a swing mechanism is laid on the side of the lower seat opposite to the upper seat;

[0008] wherein the plurality of said columns are three, the lower seat is disc-shaped, the three columns are evenly arranged on the circumference of the lower seat, and the spherical joint is located at the center of the three columns;

[0009] The swing mechanism includes a drive plate, which is movably connected to the surface of the lower seat and is parallel to the lower seat, and the end of the spherical joint away from the upper seat is suspended from the drive plate through a sealing flange;

[0010] The cylinder assembly includes multiple rotating cylinders, one end of which is installed around the edge of the driving disk, and the other end of which is fixedly installed on the lower seat. It also includes two offset cylinders, one end of which is connected to both sides of the sealing flange at the bottom of the spherical joint, and the other end of which is installed on the lower seat.

[0011] The beneficial effects of the present invention are:

[0012] A test device for a watertight pipe spherical joint of the present invention utilizes the top joint of the support frame to pump water into the spherical joint to increase pressure, utilizes the offset cylinder to push and pull the lower core shaft assembly of the spherical joint to achieve offset, utilizes the extension and contraction of the lower seat rotating cylinder to push the drive disk to achieve rotation of the lower core shaft of the spherical joint, and performs a hydrostatic pressure test on the spherical joint through the interface on the upper seat to test the static sealing performance of the spherical joint; utilizes the extension and contraction of the lower offset cylinder to achieve swinging of the lower part of the spherical joint, and realizes a dynamic swing performance test under pressure; utilizes the extension and contraction of the lower rotating cylinder to drive the drive disk to achieve rotation of the lower part of the spherical joint, and realizes a dynamic rotation performance test under pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front view of a riser ball joint test device according to the present invention;

[0014] Figure 2 It is a side view of a riser spherical joint test device of the present invention.

[0015] In the figure, 1. spherical joint, 2. support frame, 2-1. upper seat, 2-2. column, 2-3. lower seat, 3. swing mechanism, 3-1. sealing flange, 3-2. drive plate, 4. cylinder assembly, 4-1. offset cylinder, 4-2. rotary cylinder. DETAILED DESCRIPTION

[0016] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0017] The present invention provides a test device for a watertight pipe spherical joint, such as Figure 1 and Figure 2As shown, the upper seat 2-1 is at the top, and the bottom is connected to the suspended ball joint 1 by a flange. The upper seat 2-1 is supported by three columns 2-2. The ball joint 1 is fixed in the middle by the side brackets of the three columns 2-2. The three columns 2-2 are welded to the circumference of the lower seat 2-3. The lower seat 2-3 is arranged with 6 groups of supports for the offset cylinder 4-1 and 2 groups of seat plates for the rotating cylinder 4-2. The lower flange of the ball joint 1 is connected to the sealing flange 3-1. The lower ear plate of the sealing flange 3-1 can be rotated to install one end of the offset cylinder 4-1, and the other end of the offset cylinder 4-1 is installed on the support of the lower seat 2-3. At the same time, the sealing flange 3-1 can be linked and suspended with the driving disk 3-2. One end of the rotating cylinder 4-2 is installed on the edge of the driving disk 3-2, and the other end of the rotating cylinder 4-2 is installed on the two groups of seat plates of the lower seat 4-2.

[0018] Reference Figure 1 The working principle of the present invention is that the ball joint 1 is suspended on the lower flange of the upper seat 2-1, and there is an NPT1 / 2 pressure port on the top of the flange. A pressure machine is used to apply hydrostatic pressure to the inside of the ball joint from the port to test the sealing performance of the ball joint 1; the column 2-2 is equipped with a straightening frame and is installed on the lower seat 2-3, supporting the upper seat 2-1 to form a support frame 2, which constrains the upper half of the ball joint 1 and forms a certain height space between the ball joint 1 and the base 2-3. When an offset test is required, the offset cylinder 4-1 is extended, pushing the sealing flange 3-1 to drive the lower half of the spherical joint 1 to offset. Since the spherical joint 1 is always in the rated clean water pressure state, the dynamic performance test of the spherical joint 1 can be carried out through this action; when a rotation test is required, the rotating cylinder 4-2 is pushed out, pushing the driving disk 3-2 to rotate, and the driving disk 3-2 drives the sealing flange 3-1 and the lower part of the spherical joint 1 to rotate. Since the spherical joint 1 is always in the rated clean water pressure state, the dynamic performance test of the spherical joint 1 can be carried out through this action.

Claims

1. A riser spherical joint test device, characterized in that: Specifically, the support frame (2) includes an upper seat (2-1) and a lower seat (2-3) arranged horizontally, a spherical joint (1) is suspended at the center of the support frame (2), a swing mechanism (3) is provided at the bottom of the support frame (2), the swing mechanism (3) is connected to an end of the spherical joint (1) away from the support frame (2), and an oil cylinder assembly (4) is further connected between the swing mechanism (3) and the spherical joint (1), and the swing mechanism (3) is driven by the oil cylinder assembly (4); The swing mechanism (3) includes a drive disk (3-2), the drive disk (3-2) is movably connected to the surface of the lower seat (2-3) and is parallel to the lower seat (2-3), and the end of the spherical joint (1) away from the upper seat (2-1) is suspended from the drive disk (3-2) through a sealing flange (3-1); The oil cylinder assembly (4) comprises a plurality of rotating oil cylinders (4-2), one end of each of the rotating oil cylinders (4-2) being respectively mounted around the edge of the driving disk (3-2), and the other end of each of the rotating oil cylinders (4-2) being fixedly mounted on the lower seat (2-3). The oil cylinder assembly (4) further comprises two offset oil cylinders (4-1), one end of each of the two offset oil cylinders (4-1) being respectively connected to both sides of the sealing flange (3-1) at the bottom of the spherical joint (1), and the other end of each of the two offset oil cylinders (4-1) being mounted on the lower seat (2-3).

2. A riser spherical joint test device according to claim 1, characterized in that: The upper seat (2-1) and the lower seat (2-3) are opposite and parallel to each other, a plurality of columns (2-2) are connected between the upper seat (2-1) and the lower seat (2-3), a spherical joint (1) is suspended on the bottom of the upper seat (2-1) through a flange, and the spherical joint (1) is located between the upper seat (2-1) and the lower seat (2-3), and a swing mechanism (3) is laid on a side of the lower seat (2-3) opposite to the upper seat (2-1).

3. A riser ball joint test device according to claim 2, characterized in that: There are three of the plurality of upright posts (2-2), the lower seat (2-3) is disc-shaped, the three upright posts (2-2) are evenly arranged on the circumference of the lower seat (2-3), and the spherical joint (1) is located at the center of the three upright posts.

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