CN100436916C - Ball socket joint used in deep sea resource exploiting system mine throwing subsystem - Google Patents

Abstract

A ball hinged joint consists of an ore-raising pipe, a bolt, a nut, a washer, a clasp, an external ball sleeve, a ball head, a lower joint pipe end connecting piece and an upper joint ball end connecting piece. Two half-round clasps is used for integrating the joint of the ore-raising pipe with the connecting piece of the upper joint end by four set of bolts. The upper joint end connecting piece is connected with the external ball sleeve via screw threads and the ball head is connected with the lower joint end connecting piece by using a threaded connection. The ball head and the external ball sleeve can be in a relative motion to ensure that the joint has three rotating free degrees.

Description

A ball joint used in the lifting sub-system of deep-sea resource mining system

technical field

The invention belongs to the field of mechanical manufacturing, and relates to a pipe joint used in an ore lifting sub-system of a deep-sea resource mining system. The joint is a ball joint.

Background technique

The hydraulic lifting mining system combined with the mining machine and the lifting pipeline is the most promising first-generation commercial mining system in the 21st century. In this system, the connection mode and device between the hoisting pipelines are very important, and it is one of the technical keys that need to be solved.

The ore lifting pipe moves with the mining ship at a certain speed within a certain period of time. The lower end of the ore lifting pipe is almost a free end, and the operation mode is mobile. The hoisting pipe joint not only bears the total load of the mining system, but also provides a bearing surface for deployment and recovery operations. There are mainly two design methods for the design of pipe joints for lifting mines. One is to design with reference to the existing research results and experience on pipes for lifting mines in foreign deep-sea mining systems, and the other is to learn from and use drill pipes or The casing design standard is designed.

There have been many researches on ore-lifting pipes and their connecting devices at home and abroad. The connection methods of these pipe joints are mainly divided into two types, one is threaded connection, and the other is threaded and snap ring connection.

For example, the ore pipe joints tested by OMA Company are pipe clamp tests; Hydrill Company of the United States, Sumitomo Company of Japan, and Kawasaki Iron and Steel Company have developed two-pole threaded joints, VAMACE joints, NEWVAM joints, FOX joints and so on. During the "Eighth Five-Year Plan" and "Ninth Five-Year Plan" periods in our country, we have also developed threaded joints for mining pipes.

The foreign mining pipes and their joints provide a good reference material for the design of the mining pipes and joints in the 1000m offshore mining system of oceanic polymetallic nodules in my country. These systems have high tensile strength, good sealing performance and strong reliability . Some of them have uniform force on the threaded buckle teeth, some have good sealing performance, and some have good economy.

Although they have the above advantages, generally speaking, they all have a disadvantage, that is, these joints are rigidly connected, which is not suitable for the working requirements of deep sea mining, because in the working conditions of the seabed, there are liquids generated by waves and currents. The power, as well as the hydraulic power generated when the mining ship is towed, will have a large bending moment when it is transmitted to the joint through the lifting pipe. This will cause unnecessary deformation and affect the transmission of slurry, and even failure and damage will occur in severe cases. The negative impact will become more prominent when the operating water depth exceeds 5,000 meters. It is necessary to use new joints to prevent excessive bending deformation and other equipment in the pipeline system. damage.

Contents of the invention

One object of the present invention is to provide a ball joint type joint, so that the hoisting pipe is only subjected to axial force during deep sea mining operations, and is not subject to bending moment and torque, which is equivalent to a flexible pipe, and does not bring size and weight obvious increase.

A ball joint used in the lifting sub-system of the deep sea resource mining system, its structural feature is that the ball joint is composed of a lifting pipe 1, a bolt 2, a nut 3, a washer 4, a snap ring 5, an outer ball sleeve 6, a ball The head 7, the lower joint ball end connector 8, the joint pipe end connector 9, and the upper joint ball end connector 10 constitute. The upper and lower joints 10, 8 and the joint pipe end connector 9 are fastened to the two ends of the mining pipe 1 with threads and will not be disassembled. Two semicircular snap rings 5 connect the upper and lower joints of the mining pipe 1 through four sets of bolts. The connectors are joined together. There is a certain relative movement between the ball head 7 and the outer ball sleeve 6, which can ensure that the joint has three rotational degrees of freedom. Adopt threaded connection between ball joint 7 and lower joint connector 8, but must guarantee to have certain sealing. The threaded connection part between the ball head 7 and the lower joint connecting part 8, and the connecting part of the upper joint connecting part 10 and the outer ball sleeve 6 through threads are added with a multi-effect grease base with temperature resistance and water resistance to add anti-wear and extreme pressure resistance The good sealing grease made of anti-corrosion and other additives is used as the sealing material to ensure the sealing of the threaded part of the ball joint and the connection of the mining pipe.

The present invention is characterized in that:

1) In terms of structure, the upper and lower joints are connected with the snap ring. The upper and lower joints are fastened to the two ends of the mine lifting pipe with threads and will not be disassembled. Two semicircular snap rings connect the upper and lower joints of the mine lifting pipe through four bolts. The material is 40Cr.

2) No welding parts, high connection strength, fast disassembly and assembly, can be reused many times, can provide a bearing surface for deploying and recycling devices, and does not require a special pipe twister.

This time, the design adopts the ball-joint connection, and the hoisting pipe is connected with the ball-type joint and the snap ring. The thread part in the connection device adopts the API standard, which not only absorbs the advanced experience from abroad, but also makes great improvements. The ore hoisting pipe is only subjected to axial force and not subject to bending moment and torque, which is equivalent to a flexible pipe and meets the design requirements.

The effect of the invention: through the relative movement of the ball head and the outer ball sleeve, the three rotational degrees of freedom of the joint are released, so that the ore lifting pipes are free from bending moment and torque during movement, thereby realizing the flexible connection between the ore lifting pipes. The sealing of the threaded part prevents the leakage of the material in the lifting pipe, and realizes safe transportation and no environmental pollution. This ball joint is suitable for the hoisting system of various deep-sea resources such as oceanic manganese nodules, cobalt-rich crusts, and hydrothermal sulfides.

Description of drawings

Figure 1 is a cross-sectional view of the connection of the front lift pipe

Fig. 2 is a sectional view of an embodiment of the present invention

Detailed ways

Hereinafter, the present invention will be described using embodiments in the drawings.

The ball joint is composed of lifting pipe 1, bolt 2, nut 3, washer 4, snap ring 5, outer ball sleeve 6, ball head 7, lower joint ball end connector 8, joint pipe end connector 9, upper joint ball end Connector 10 constitutes.

In the sectional view of Fig. 2, in order to make the design result meet multiple requirements, several threaded connections used in the design include: the connection between the end of the mining pipe 1 and the joint pipe end connector, the outer ball sleeve 6 and the upper The connection of the joint ball end connector 10, the connection of the ball head 7 and the lower ball end connector 8, the connection of the joint pipe end connector 9 and the end of the mine lifting pipe. All of the above connections use sealing material. Since the hoisting pipe bears huge axial tension during use, all connections require high processing technology.

The connection between the hoisting pipe 1 and the upper joint ball end connector 10 uses two semicircular snap rings 5 connected together by four sets of bolts. This part is completely fixed, and there is no movable space between parts, except for replacement parts. As a whole, no disassembly.

The connection between the joint pipe end connector 9 and the end of the mining pipe is also connected by two semicircular snap rings 5 through four sets of bolts, which are also fixed, and there is no movable space between the parts. As a whole, no disassembly.

The parts of the upper joint connector 10 and the outer ball sleeve 6 and the lower joint connector 8 and the ball head 7 are the key parts of this design. The connection between the upper joint connector 10 and the outer ball sleeve 6 makes the inside form a spherical surface, and the ball head 7 It can rotate freely inside a certain angle. Besides the direction of the ore lifting pipe, there are two degrees of freedom of rotation, which are placed in the entire ore lifting pipe, so that the ore lifting pipe is not subject to bending moment and torque during motion, so as to realize the ore lifting Flexible joints between pipes.

The threaded connection between the ball head 7 and the lower joint connecting piece 8 has high requirements. It is made by adding a certain amount of additives such as anti-wear, extreme pressure and corrosion resistance to the temperature-resistant and water-resistant multi-effect grease base. Good sealing grease is used as a sealing material to ensure the sealing of the threaded part of the joint between the ball joint and the hoist pipe.

Claims (3)

1. A ball joint used in the ore lifting subsystem of the deep-sea resource mining system, characterized in that the ball joint is composed of an ore lifting pipe (1), bolts (2), nuts (3), washers (4), clips Ring (5), outer ball sleeve (6), ball head (7), lower joint ball end connector (8), joint pipe end connector (9), upper joint ball end connector (10); two The joint pipe end connectors (9) are respectively fastened with threads at one end of the two hoisting pipes to be connected and are not disassembled. Two semicircular snap rings (5) connect the joint pipe end connectors (9) with four sets of bolts. The upper joint ball end connector (10) is connected together, and the same structure connects the lower joint ball end connector (8) with the other joint pipe end connector (9); the upper joint ball end connector (10) It is connected with the outer ball sleeve (6) through threads; the ball head (7) and the outer ball sleeve (6) can move relative to each other to ensure that the joint has three degrees of freedom of rotation; the ball head (7) and the lower joint ball end connecting piece ( 8) between threaded connection. 2. The ball joint according to claim 1, characterized in that the threaded connection part between the ball joint (7) and the lower joint ball end connector (8), the upper joint ball end connector (10) and the outer ball The threaded connection between the sleeves (6) is made of temperature-resistant, water-resistant multi-effect grease base with anti-wear, extreme pressure and anti-corrosion additives as the sealing material with good sealing to ensure that the ball joints The seal of the threaded part of the joint with the hoisting mine pipe. 3. The ball joint according to claim 1, characterized in that it is suitable for lifting systems of oceanic manganese nodules, cobalt-rich crusts and hydrothermal sulfide deep-sea resources.

Images