CN103591160B - Oil and gas pipes defect internal detector universal joint - Google Patents

Abstract

The universal joint of the internal detector for oil and gas pipeline defects includes a hollow adapter shaft. The front and rear ends of the hollow adapter shaft are connected to the rear end shaft holes of two hollow butterfly cross blocks through rotating pins, and are locked with lock nuts. Tight, the link pin holes at both ends of the hollow adapter shaft are perpendicular to each other, and the two hollow butterfly cross blocks are arranged symmetrically. The flange on the function section of the device is hinged, the front and rear end shaft holes of the butterfly cross block are perpendicular to each other, and a sliding thrust copper sleeve is installed on the mating surface of the flange connection pin shaft and the shaft hole. The invention has few parts and a simple structure. It is easy to disassemble and assemble, has high reliability, does not expose the cables, and has a good protective effect on the electrical cables of the oil and gas pipeline defect internal detectors. It meets the working conditions and conditions of the oil and gas pipeline internal defect detectors, and can be used for different types and calibers The connection between the various functional sections of the oil and gas pipeline defect detector.

Description

Oil and gas pipeline defect inner detector universal joint

technical field

The invention relates to the technical field of oil and gas pipeline defect detection, in particular to a universal joint of an internal detector for oil and gas pipeline defects.

Background technique

With the development of oil and gas extraction technology, the supporting oil and gas pipeline transportation technology is also constantly improving, and the safety of oil and gas pipelines is the key technology in this field. The oil and gas pipeline defect internal detectors used in the online detection of oil and gas pipelines, especially the oil and gas pipeline defect internal detectors with small and medium diameters, are often in the form of multiple sections. need. The utility model patent "In-Pipeline Link Universal Joint" with the application number of 200920164614.8 provides a universal joint structure for detectors in oil and gas pipelines. The connection strength of the joint structure is low, and it is easy to break under high-speed detection and impact conditions. In addition, the cables between the functional sections of the detector are easily damaged and broken when they are accompanied outside the universal joint. In view of this situation, the present invention adopts the form of several hollow parts to form a hinge through the rotating link to realize the universal connection between the joints of the defect detector in the oil and gas pipeline. It eliminates the scraping of the cable when the oil and gas pipeline defect internal detector passes through the pipeline bend and deformation.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a universal joint for the internal defect detector of the oil and gas pipeline, which has high structural strength and avoids scratching of the cable when the internal defect detector of the oil and gas pipeline passes through the pipeline bend and deforms. rub.

In order to achieve the above object, the technical scheme that the present invention takes is:

The internal detector universal joint for oil and gas pipeline defects includes a hollow adapter shaft 5, the front and rear ends of the hollow adapter shaft 5 are connected to the rear end shaft holes of two hollow butterfly cross blocks 3 through a rotating pin shaft 6, and are used The locking nut 4 is locked, the link pin holes 7 at both ends of the hollow adapter shaft 5 are perpendicular to each other, and the two hollow butterfly cross blocks 3 are arranged symmetrically. The connecting pin 1 is hinged with the flange on the functional section of the internal defect detector of the oil and gas pipeline. The front and rear shaft holes of the butterfly cross block 3 are perpendicular to each other. Push the copper sleeve 2.

The center of the butterfly cross block 3 has a wire hole 8 .

Both ends of the hollow adapter shaft 5 are milled with circular arc grooves, which are processed into a duckbill shape.

The flange connection pin 1 and the rotating pin 6 are stepped shafts, the material is 40Cr steel, the surface is subjected to high-frequency quenching after conditioning, and the quenching hardness is G52.

Described locking nut 4 is made by the fine thread round nut, and after drilling and tapping on the side of the round nut, a jackscrew is installed.

The sliding thrust copper sleeve 2 is made of manganese bronze or tin bronze material, the sliding thrust copper sleeve 2 is pressed into the installation hole, and the sliding thrust copper sleeve 2 is in clearance fit with the flange connection pin shaft 1, and the fit clearance is 0.05-0.12 mm, and the installation clearance of the thrust surface of the sliding thrust copper sleeve 2 is 0.08-0.15 mm.

The invention has few parts, simple structure, convenient disassembly and assembly, strong reliability, no exposed cables, better protection for the electrical cables of the oil and gas pipeline defect internal detector, and meets the operating conditions and requirements of the oil and gas pipeline defect internal detector. It can be used for the connection between the various functional sections of the internal defect detectors of oil and gas pipelines of different types and calibers.

Description of drawings

Figure 1 is an axonometric view of the present invention.

FIG. 2 is a schematic structural diagram of the butterfly cross block 3 of the present invention.

FIG. 3 is a schematic structural diagram of the hollow adapter shaft 5 of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to Figures 1 and 2, the internal detector universal joint for oil and gas pipeline defects consists of a hollow adapter shaft 5, a cross block 3, a rotating pin 6, a flange connection pin 1, a lock nut 4 and a sliding thrust copper The sleeve 2 is composed of; the front and rear pin holes of the hollow adapter shaft 5 are connected with the rear end shaft holes of the two hollow butterfly cross blocks 3 through the rotating pin shaft 6, and are locked with the lock nut 4, and the hollow adapter shaft 5. The link pin holes 7 at both ends are perpendicular to each other. Two hollow butterfly cross blocks 3 are symmetrically arranged. The front end of the butterfly cross block 3 is provided with a shaft hole, and the pin shaft 1 is connected to the internal defect detector of the oil and gas pipeline through the flange. The flange on the function section is hinged, the front and rear shaft holes of the butterfly cross block 3 are perpendicular to each other, and the sliding thrust copper sleeve 2 is installed on the mating surface of the flange connecting pin shaft 1 and the shaft hole. Referring to Fig. 2, the butterfly cross block 3 is a 45 steel forging, the surface is plated with hard chrome, and the center of the butterfly cross block 3 has a wire hole 8.

Referring to Fig. 3, the hollow transfer shaft 5 is a 45 steel forging, the surface is plated with hard chromium, the hollow transfer shaft 5 is in the form of a hollow shaft, and the two ends of the shaft are provided with hinge pin holes 7 perpendicular to each other; Shaft 6 extrudes the cables, and both ends of the hollow transfer shaft 5 are milled with circular arc grooves, which are processed into a duckbill shape.

The flange connection pin 1 and the rotating pin 6 are stepped shafts, the material is 40Cr steel, the surface is subjected to high-frequency quenching after conditioning, and the quenching hardness is G52.

The lock nut 4 is remanufactured from a round nut with fine teeth. After drilling and tapping the side of the round nut, an M3 top screw is installed. shaft volume.

The sliding thrust copper sleeve 2 is made of manganese bronze or tin bronze material, the sliding thrust copper sleeve 2 is pressed into the installation hole, and the sliding thrust copper sleeve 2 is in clearance fit with the flange connection pin shaft 1, and the fit clearance is 0.05-0.12 mm, and the installation clearance of the thrust surface of the sliding thrust copper sleeve 2 is 0.08-0.15 mm.

The working principle of the internal detector universal joint for oil and gas pipeline defects is as follows: the two ends of the hollow transfer shaft 5 are provided with hinge pin holes 7 perpendicular to each other, and a duckbill-shaped arc groove is milled out. After the cross-shaped cross block 3 is connected, two degrees of freedom of rotation in the vertical direction can be realized; at the same time, the cross shaft holes of the butterfly-shaped cross block 3 are arranged front and back, and are perpendicular to each other, which also provides two degrees of freedom of rotation in different directions; A sliding thrust copper sleeve 2 is installed on the rotating mating surface of the hole and the flange connection pin shaft 1, which plays the role of reducing wear and improves the service life of the universal joint; the hollow connecting shaft 5 and the butterfly cross block 3 are both There is a wire hole 8, and the wire is passed inside, which avoids scratching the cable when the inner detector of the oil and gas pipeline defect passes through the elbow and deformation of the pipeline.

The installation steps of the internal detector universal joint for oil and gas pipeline defects are as follows:

1) Press the sliding thrust copper sleeve 2 into the installation hole of the flange connection pin 1, and the flange surface of the copper sleeve is close to the installation surface;

2) Connect the two butterfly cross blocks 3 of the universal joint with the flange lugs of the front and rear functional joints of the detector respectively, insert the flange connection pin 1, and complete the connection between the front and rear functional joints of the oil and gas pipeline defect detector. Hinge to the butterfly cross block 3 corresponding to the knuckle, tighten the lock nut 4, and tighten the locking screw on the lock nut 4;

3) Insert the hollow adapter shaft 5 of the universal joint into the lug seat of the butterfly cross block 3, pass through the rotating pin shaft 6, and tighten the lock nut 4, and tighten the locking screw on the lock nut 4 Tighten it to complete the articulation of the front butterfly cross block 3 of the universal joint and the hollow adapter shaft 5;

4) Repeat steps 1-3 to complete the assembly of the entire universal joint.

Claims (6)

1. The internal detector universal joint for oil and gas pipeline defects, including the hollow adapter shaft (5), is characterized in that: the front and rear ends of the hollow adapter shaft (5) connect with two hollow butterfly crosses through the rotating pin shaft (6) The shaft holes at the rear end of the fork block (3) are connected and locked with lock nuts (4). The link pin holes (7) at both ends of the hollow adapter shaft (5) are perpendicular to each other. Two hollow butterfly cross fork blocks (3) Symmetrically arranged, the front end of the butterfly cross block (3) is equipped with a shaft hole, through the flange connection pin (1) and the flange on the functional section of the internal defect detector of the oil and gas pipeline hinged, the butterfly cross block The shaft holes at the front and rear ends of (3) are perpendicular to each other, and a sliding thrust copper sleeve (2) is installed on the mating surface of the flange connection pin shaft (1) and the shaft hole. 2. The internal detector universal joint for oil and gas pipeline defects according to claim 1, characterized in that: the center of the butterfly cross block (3) has a wire passing hole (8). 3. The internal detector universal joint for oil and gas pipeline defects according to claim 1, characterized in that: both ends of the hollow adapter shaft (5) are milled with circular arc grooves and processed into a duckbill shape. 4. The internal detector universal joint for oil and gas pipeline defects according to claim 1, characterized in that: the flange connection pin (1) and the rotating pin (6) are stepped shafts, and the material is 40Cr steel, After modulation, the surface is subjected to high-frequency quenching treatment, and the quenching hardness is G52. 5. The internal detector universal joint for oil and gas pipeline defects according to claim 1, characterized in that: the lock nut (4) is remade from a fine-pitched round nut, and after drilling and tapping the side of the round nut, Install top wire. 6. The internal detector universal joint for oil and gas pipeline defects according to claim 1, characterized in that: the sliding thrust copper sleeve (2) is made of manganese bronze or tin bronze, and the sliding thrust copper sleeve (2) Press into the installation hole, the sliding thrust copper sleeve (2) and the flange connection pin (1) have a clearance fit, the fit clearance is 0.05-0.12mm, and the sliding thrust copper sleeve (2) thrust surface installation clearance is 0.08-0.15mm mm.