WO2017181446A1

WO2017181446A1 - Corrosion detector adaptable to stepped pipelines

Info

Publication number: WO2017181446A1
Application number: PCT/CN2016/080900
Authority: WO
Inventors: 张丛
Original assignee: 深圳市樊溪电子有限公司
Priority date: 2016-04-21
Filing date: 2016-05-03
Publication date: 2017-10-26
Also published as: WO2017181395A1

Abstract

A corrosion detector adaptable to stepped pipelines comprises: a detector frame (1), a spring connecting rod structure, a torsion spring support structure, and a magnet probe structure which can adapt to the stepped pipelines. The magnet probe structure comprises: a groove shaped casing (8) which is filled with an iron core (12); a magnet steel brush mechanism, provided at the front end of the iron core (12) and the rear end of the iron core (12), respectively, and is composed by a magnet (9) and a steel brush (10), and the magnet steel brush mechanism is in contact with the pipe wall of the stepped pipelines for removing the dirt from the pipe wall of the stepped pipelines; a collecting probe mechanism (11), provided at an intermediate end of the core (12), and an anti-collision wheels mechanism (7) provided on the outer wall of the groove type casing (8) for preventing the magnet probe structure from bumping in the stepped pipelines.

Description

Corrosion detector capable of adapting to variable diameter pipe

Technical field

The present invention relates to the field of measurement of defects and piping systems, and more particularly to a corrosion detector that can accommodate a variable diameter pipe.

Background technique

In order to ensure the safe transportation of pipelines, it is necessary to carry out pipeline cleaning and internal inspection operations on a regular basis. However, due to pipeline repair and economic reasons, some or all of the pipeline sections are designed as variable diameter pipelines, which increases the inspection and internal inspection work. Difficulties. Nowadays, the mechanical pig is generally used for the pigging. If there is a variable diameter section in the pipeline, the cup of the ordinary pig does not have sufficient reducing capacity, and the pigging requirements of the variable diameter pipeline cannot be met at all. At the same time, the probe of the intelligent pig has a limited amount of deformation, which is difficult to meet the requirements of the detection in the variable diameter pipeline.

At present, foreign countries have successfully developed variable-diameter equipment, but there are few reports on the key technologies of variable-diameter equipment on the public information. However, there are few researches and applications on the variable-path detection technology in China. At present, there is no mature pipeline pigging. ,Testing Equipment.

Therefore, the inventors have proposed a magnet probe structure that can adapt to a variable diameter pipe by overcoming the experience and practice of related industries for many years to overcome the defects of the prior art.

Summary of the invention

The technical problem to be solved by the present invention is to provide a corrosion detector that can accommodate a variable diameter pipe.

In order to solve the above technical problem, the present invention provides a magnet probe structure that can accommodate a variable diameter pipe, and the magnet probe structure includes:

a slotted housing, the slotted housing is internally filled with a core;

a magnet steel brush mechanism comprising a magnet and a steel brush, the magnet steel brush mechanism being respectively disposed at a front end of the iron core and a rear end of the iron core, the magnet steel brush mechanism and the pipe of the variable diameter pipe a wall contact for removing dirt of the reduced diameter pipe wall;

Collecting a probe mechanism disposed at a middle end of the iron core;

An anti-collision wheel mechanism is disposed on the outer wall of the slotted housing for preventing the magnet probe structure from colliding in the variable diameter pipe.

Further, the magnet probe structure further includes:

The first connecting shaft and the second connecting shaft are respectively disposed on the outer wall of the slotted housing for fixing the magnet probe structure on the corrosion detector.

Further, the material of the grooved casing is stainless steel or titanium.

Further, the collecting probe mechanism is composed of a probe shell, a probe arm, a supporting spring, and a fiber belt;

Further, the fiber ribbon and the support spring are fixed to the detector frame. When the weld or pipe diameter changes, the support spring compresses or recovers, ensuring that the probe shell is always in contact with the inner wall of the pipe.

Further, the anti-collision wheel of the anti-collision wheel mechanism is made of a non-metallic elastic material coated with a rigid outer hub.

Further, the anti-collision wheel of the anti-collision wheel mechanism is entirely composed of the non-metallic elastic material.

Further, the non-metallic elastic material is a high-strength polyurethane material or a high-strength nylon material.

Further, the outer surface of the iron core is in a "∧" shape.

A corrosion detector adaptable to a reduced diameter pipeline, comprising: a detector skeleton, a spring linkage structure, a torsion spring support structure, and any one of the above magnet probe structures adapted to the variable diameter pipeline;

Further, the spring link structure is disposed on the detector frame for fixing the magnet probe structure;

Further, the torsion spring supporting structure is disposed on the detector frame for fixing the magnet probe structure;

Further, the magnet probe structure is respectively connected to the spring link structure and the torsion spring support structure for cleaning dirt in the reducer pipe.

Further, the spring link structure is composed of a first connecting arm, a support, a pull rod and a compression spring;

Wherein the support is connected by a screw and the detector skeleton for supporting the spring link structure;

The compression spring is sleeved on the pull rod and connected to the support by the pull rod;

One end of the first connecting arm is connected to the support, and the other end of the first connecting arm is connected to the first connecting shaft for fixing the magnet probe structure to the detector frame on.

Further, the torsion spring support structure is composed of a fixed seat, a second connecting arm and a torsion spring;

The fixing base and the torsion spring are mounted on the detector frame for fixing the torsion spring support structure;

One end of the second connecting arm is connected to the fixing base and is in contact with the torsion spring, and the other end of the second connecting arm is connected to the second connecting shaft for the magnet probe structure It is fixed on the detector skeleton.

In the invention, the collecting probe is mounted on the iron core, and when the pipe weld or the diameter of the pipe changes, the collecting probe deforms or recovers under the action of the supporting spring, so that the probe is closely attached to the inner wall of the pipe. The iron core is installed in the fixed casing, and the anti-collision wheel mechanism is installed at the front and rear ends of the fixed casing to prevent the magnet probe mechanism from colliding with the pipe wall. The front end of the fixed housing is connected with the spring support mechanism, and the torsion spring support mechanism is connected to the middle end and the rear end to ensure that the magnet probe mechanism changes with the diameter of the pipe, and compression and reset motion occur. When the detector is running in the reducing pipe, the steel brush is in close contact with the pipe wall, and the pipe diameter becomes small, forcing the magnet probe structure to be radially compressed. At this time, the collecting probe is also compressed, because the collecting probe is mounted on the adjacent magnet probe structure. , which is arranged in a stepped manner in the axial direction of the pipe, thereby ensuring that the magnet probe mechanism passes through the small-diameter pipe, and the collecting probe is in the axial direction of the pipe. The directions overlap to avoid interference squeeze between the acquisition probes.

DRAWINGS

Figure 1 is a cross-sectional view of the magnet probe structure

Figure 2 Location of the adjacent magnet probe structure acquisition probe

Figure 3 core cross-sectional view

among them

1-detector skeleton 2-screw

3-support one 4-axis one

5-connecting arm one 6-axis two

7-anti-collision wheel 8-fixed housing

9-magnet 10-steel brush

11- collection probe 12-core

13-connecting arm two 14-torsion spring

15-pull 16-pressure spring

detailed description

For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 2, the present invention provides a magnet probe structure that can adapt to a variable diameter pipe. The probe structure is mounted on a skeleton of a variable diameter detector, and a plurality of the probes can be mounted on the pipe diameter reducer detector. Structure, the probe structure is arranged in a row. A plurality of acquisition probes are arranged on each probe structure, and the acquisition probes arranged on adjacent probe structures are arranged in a stepwise manner in the axial direction of the pipeline, that is, as shown in FIG. 2, which is equivalent to all the acquisition probes being intermittent. Distributed in two rows. Each collection probe collects tube wall defect data independently. The structure of the magnet probe and the number of acquisition probes arranged on the variable diameter detector are determined by the probe detection sensitivity, the measured pipe diameter and the pipe diameter range. In the present embodiment, the entire variable diameter detector is arranged with a total of 8 magnet probe structures arranged in a row, and 15 acquisition probes are arranged on each probe structure to ensure 100% signal coverage of the circumference of the largest diameter of the variable diameter pipe. rate. When the detector passes through the small-diameter pipe, the magnet probe structure generates radial compression under the action of the front end spring support mechanism, the middle and the tail end torsion spring support mechanism, and the acquisition probe can also adapt to the pipe diameter change due to the use of the support spring form. Appropriate deformation, compression probes on the adjacent magnet probe structure are compressed. Since the acquisition probes on the adjacent probe structure are arranged in a stepped manner, some probes will overlap in the axial direction of the pipe, which ensures that the probe signal is The 100% coverage of the pipeline in the circumferential direction ensures that the axial dimension of the pipeline is reduced due to the smaller diameter of the pipeline, and the interference squeeze phenomenon does not occur, ensuring the integrity and accuracy of signal acquisition.

The magnet probe structure of the present invention comprises a magnet steel brush mechanism, an acquisition probe mechanism and an anti-collision wheel mechanism. Magnet probe structure The front end is fixed on the skeleton of the variable diameter detector by a spring connecting rod mechanism, and the middle and the rear end of the magnet probe structure are fixed on the skeleton by the torsion spring supporting mechanism; the magnet steel brush mechanism and the collecting probe mechanism comprise a fixed shell and are fixed The iron core is installed inside the casing, the upper surface of the iron core is inverted "V" shape, two magnets are installed on the front and rear ends of the iron core, and the steel brush is mounted on the magnet; the collecting probe mechanism is installed between the steel brushes at the front and rear ends of the iron core, and the anti-defense The striker mechanism is mounted on a stationary housing. In this embodiment, as shown in FIG. 1 and FIG. 3, the collecting probe 11 is mounted on the iron core 12, and two magnets 9 and a steel brush 10 are respectively mounted on the front and rear ends of the iron core, and the iron core is installed in the fixed casing 8. An anti-collision wheel mechanism 7 is mounted on the front and rear ends of the fixed casing, and the front end of the fixed casing is connected to the connecting arm 5 through the shaft, the connecting arm 5, the fixing seat 3, the pull rod 15 and the compression spring 16 constitute a spring connecting rod mechanism, and the spring connecting rod The mechanism is fixed to the skeleton 1, and the spring link mechanism serves as a support. The middle and the rear end of the fixed housing are connected with the connecting arm 213, and the connecting arm 213, the torsion spring 14 and the fixed seat 2 constitute a torsion spring supporting mechanism, and the torsion spring supporting mechanism plays a supporting role. The front, middle and rear spring support mechanisms serve to support and stabilize the structure of the magnet probe.

In the present invention, the fixed casing 8 is a slotted structure with an open end, and the fixed casing material is a stainless steel or titanium having a high strength and a non-magnetic material.

In the present invention, the anti-collision wheel mechanism 7 is made of a non-metallic elastic material coated with a rigid outer hub, or the anti-collision wheel is completely made of a non-metallic elastic material, which is a high-strength polyurethane material or a high-strength nylon material.

In the present invention, the collecting probe 11 is composed of a probe shell, a probe arm, a supporting spring, and a fiber ribbon. The probe tip is connected to the probe arm, the rear end is connected to the support spring, the probe arm is connected to the fiber band, and the fiber band and the support spring are fixed on the detector frame. When the weld or pipe diameter changes, the support spring compresses or recovers, ensuring that the probe shell is always in contact with the inner wall of the pipe.

As described above, in the present invention, the collecting probe is mounted on the iron core, and when the pipe weld or the diameter of the pipe changes, the collecting probe is deformed or restored under the action of the supporting spring, so that the probe is in close contact with the inner wall of the pipe. The iron core is installed in the fixed casing, and the anti-collision wheel mechanism is installed at the front and rear ends of the fixed casing to prevent the magnet probe mechanism from colliding with the pipe wall. The front end of the fixed housing is connected with the spring support mechanism, and the torsion spring support mechanism is connected to the middle end and the rear end to ensure that the magnet probe mechanism changes with the diameter of the pipe, and compression and reset motion occur. When the detector is running in the reducing pipe, the steel brush is in close contact with the pipe wall, and the pipe diameter becomes small, forcing the magnet probe structure to be radially compressed. At this time, the collecting probe is also compressed, because the collecting probe is mounted on the adjacent magnet probe structure. It is arranged in a stepped manner in the axial direction of the pipe, so as to ensure that the magnet probe mechanism passes through the small-diameter pipe, the collecting probes overlap in the axial direction of the pipe, and the interference squeeze phenomenon between the collecting probes is avoided.

It should be noted that the above specific embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting, although the present invention will be described in detail with reference to the examples. Modifications or equivalents are intended to be included within the scope of the appended claims.

Claims

The invention relates to a corrosion detector capable of adapting to a variable diameter pipeline, which comprises: a detector skeleton, a spring linkage structure and a torsion spring support structure, which can adapt to the magnet probe structure of the variable diameter pipeline;

The spring link structure is disposed on the detector frame for fixing the magnet probe structure;

The torsion spring support structure is disposed on the detector frame for fixing the magnet probe structure;

The magnet probe structure is respectively connected to the spring link structure and the torsion spring support structure for cleaning dirt in the reducer pipe.
A magnet probe structure adaptable to a reduced diameter pipe according to claim 1, wherein the magnet probe structure comprises:

a slotted housing, the slotted housing is internally filled with a core;

a magnet steel brush mechanism comprising a magnet and a steel brush, the magnet steel brush mechanism being respectively disposed at a front end of the iron core and a rear end of the iron core, the magnet steel brush mechanism and the pipe of the variable diameter pipe a wall contact for removing dirt of the reduced diameter pipe wall;

Collecting a probe mechanism disposed at a middle end of the iron core;

An anti-collision wheel mechanism is disposed on the outer wall of the slotted housing for preventing the magnet probe structure from colliding in the variable diameter pipe.
The corrosion detector of the adjustable diameter pipe according to claim 2, wherein the magnet probe structure further comprises:

The first connecting shaft and the second connecting shaft are respectively disposed on the outer wall of the slotted housing for fixing the magnet probe structure on the corrosion detector.
A corrosion detector for a variable diameter pipe according to claim 2, wherein the material of the grooved casing is stainless steel or titanium.
The corrosion detector of the variable diameter pipeline according to claim 2, wherein the collection probe mechanism is composed of a probe shell, a probe arm, a support spring, and a fiber ribbon;

Wherein, the front end of the collecting probe is connected to the probe arm, the rear end is connected with the supporting spring, the probe arm is connected with the fiber belt, and the fiber belt and the supporting spring are fixed on the detector skeleton. When the weld or pipe diameter changes, the support spring compresses or recovers, ensuring that the probe shell is always in contact with the inner wall of the pipe.
The corrosion detector for adaptable variable diameter pipe according to claim 2, wherein the anti-collision wheel of the anti-collision wheel mechanism is made of a non-metallic elastic material coated with a rigid outer hub.
A corrosion detector adaptable to a reduced diameter pipe according to claim 2, wherein the anti-collision wheel of the anti-collision wheel mechanism is entirely composed of the non-metallic elastic material.
A corrosion detector adaptable to a reduced diameter pipe according to claim 7, wherein said non-metallic elastic material is a high strength polyurethane material or a high strength nylon material.
A corrosion detector adaptable to a reduced diameter pipe according to claim 2, wherein the outer surface of said core is of a "∧" type.
The corrosion detector for adaptable variable diameter pipe according to claim 1, wherein the spring link structure is composed of a first connecting arm, a support, a tie rod and a compression spring;

Wherein the support is connected by a screw and the detector skeleton for supporting the spring link structure;

The compression spring is sleeved on the pull rod and connected to the support by the pull rod;

One end of the first connecting arm is connected to the support, and the other end of the first connecting arm is connected to the first connecting shaft for fixing the magnet probe structure to the detector frame on.
The corrosion detector of the adjustable diameter pipe according to claim 1, wherein the torsion spring support structure is composed of a fixing base, a second connecting arm and a torsion spring;

The fixing base and the torsion spring are mounted on the detector frame for fixing the torsion spring support structure;

One end of the second connecting arm is connected to the fixing base and is in contact with the torsion spring, and the other end of the second connecting arm is connected to the second connecting shaft for the magnet probe structure It is fixed on the detector skeleton.