CN113155076A - Contact type pipeline inner diameter detection mechanism - Google Patents
Contact type pipeline inner diameter detection mechanism Download PDFInfo
- Publication number
- CN113155076A CN113155076A CN202110306454.1A CN202110306454A CN113155076A CN 113155076 A CN113155076 A CN 113155076A CN 202110306454 A CN202110306454 A CN 202110306454A CN 113155076 A CN113155076 A CN 113155076A
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- CN
- China
- Prior art keywords
- claw
- sensor
- centralizing
- pipeline
- detection mechanism
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/10—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring diameters
- G01B21/14—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring diameters internal diameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
- F16L55/28—Constructional aspects
- F16L55/40—Constructional aspects of the body
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/30—Inspecting, measuring or testing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention designs a contact type inner diameter detection mechanism for measuring the inner diameter change conditions of pipelines with different standard inner diameters, which is characterized in that: the front end of the mechanism is a base, four quadrilateral sensor bins are welded on the base and used for placing sensors, and meanwhile, threaded holes are formed in the upper portions of the sensor bins and used for fixing the sensors. The rear end of the base is provided with two centralizing claws, the middle parts of the two centralizing claws are connected through a threaded rod, and springs are arranged among the base, the front centralizing claw and the rear centralizing claw, so that the supporting arm of the centralizing claw keeps open in a natural state and can be propped against the inner wall of the pipeline after being stressed in the pipeline. The invention has the advantages that: 1. the elongation of the displacement sensor can be freely adjusted, so that the detection mechanism can measure pipelines with different inner diameters. 2. The righting claw can ensure that the center of the instrument is always positioned in the center of the pipeline when the detection mechanism measures.
Description
Technical Field
The invention relates to a contact type pipeline inner diameter detection mechanism.
Background
Along with the development of trenchless pipe laying and pipe laying technology, the quality problem of the used pipes gradually occurs during service, if the MPP pipe body has defects (pipe body inner diameter change), the problem that slurry in a drill hole leaks to the inner wall of a pipeline and causes the increase of the drag pipe resistance occurs in the pipe laying construction is caused, and therefore the use of an electric power pipeline is influenced. Therefore, the pipe acceptance inspection equipment is researched to rapidly and accurately detect the inner diameter increasing or decreasing quantity value of any position in the MPP pipeline, the inner diameter variation is accurate to 1mm, the defective pipes are eliminated in time, bad phenomena in pipe laying construction are reduced, the development of a non-excavation pipe laying technology can be effectively promoted, and the modern construction of the power pipeline is actively promoted.
Disclosure of Invention
The invention aims to solve the problems of sensor placement and overall structure centering in contact type inner diameter detection in the prior art. The invention designs a contact type pipeline inner diameter detection mechanism, which comprises a front centralizing claw, a rear centralizing claw and a middle connecting threaded rod, and is characterized in that: the front end of the front centralizing claw is provided with a detection device which is a circular base, a sensor cabin is arranged on the circular base, a displacement sensor is placed in the sensor cabin, and an outer spring is sleeved on a connecting threaded rod between the front centralizing claw and the rear centralizing claw. Four sensor bins are welded on the circular base, threaded holes are formed in the upper ends of the sensor bins, screws are screwed in the threaded holes, and the inner sides of the screws are connected with displacement sensors located in the sensor bins. The righting claw comprises a supporting seat, a supporting arm, an inner spring, a pulley, a fixed arm and a mounting seat, wherein the supporting seat is connected with a plurality of supporting arms through shaft pins, the tail end of the supporting arm is connected to the pulley shaft through the shaft pins, the pulley shaft is connected to the fixed arm, the tail end of the fixed arm is connected to the mounting seat through the shaft pins, the supporting seat is fixed to a connecting threaded rod, the mounting seat is sleeved on the connecting threaded rod in an empty mode, and the supporting seat and the mounting seat are connected through the inner spring. At least three supporting arms and three pulleys are arranged on each righting claw. The invention has the advantages that the centralizing claw keeps opening in a natural state, and simultaneously can prop against the inner wall of the pipeline after being stressed in the pipeline, so that the integral structure is positioned at the center of the pipeline in the detection process, and the detected data is more accurate.
Drawings
Fig. 1 is an overall structural schematic of the present invention.
Fig. 2 is a schematic front view of the circular base of the present invention.
Detailed Description
In the figure, a contact type pipeline inner diameter detection mechanism comprises a front righting claw 1, a rear righting claw 1 and a middle connecting threaded rod 2, and is characterized in that: the front end of the front centralizing claw is provided with a detection device which is a circular base 3, a sensor cabin 4 is arranged on the circular base, and a displacement sensor 5 is arranged in the sensor cabin. An outer spring 13 is sleeved on the connecting threaded rod between the front and the rear centralizing claws. Four sensor bins are welded on the circular base, threaded holes are formed in the upper ends of the sensor bins, screws are screwed in the threaded holes, and the inner sides of the screws are connected with displacement sensors located in the sensor bins. Righting the claw by supporting seat 7, support arm 8, inner spring 9, pulley 10, fixed arm 11, mount pad 12 is constituteed, it has a plurality of support arms 8 to be connected by the pivot pin on supporting seat 7, the end of support arm 9 is epaxial at pulley 10 by the pivot pin connection, pulley 10 is epaxial by fixed arm 11 connection, fixed arm 11's end is on mount pad 12 by the pivot pin connection, supporting seat 7 is fixed on connecting thread rod 2, mount pad 12 empty sleeve is on connecting thread rod 2, connect by inner spring 9 between supporting seat 7 and the mount pad 12. At least three supporting arms 8 are arranged on each righting claw, and at least three pulleys 1 are arranged on each righting claw.
The right side of the contact type pipeline inner diameter detection mechanism is provided with a head at the position of a disc, the left side of the contact type pipeline inner diameter detection mechanism is provided with a tail, and a traction rod is arranged at the tail in the pipeline to push an instrument to move towards the interior of the pipeline. The contact type pipeline inner diameter detection mechanism mainly comprises a supporting seat, a supporting arm, an inner spring and a pulley, wherein the inner spring enables the supporting arm to be always in an open state in a natural state due to the limitation of a limiting block and under the action of self elasticity, and the pulley is in contact with a pipe wall to realize centering, so that errors caused by eccentricity during measurement are avoided. Meanwhile, the friction resistance between the crawler and the pipe wall can be effectively reduced by the pulleys, and the phenomenon of pause and contusion generated when the contact type pipeline inner diameter detection mechanism travels is avoided. The position of the limiting block can be adjusted, so that the contact type pipeline inner diameter detection mechanism is suitable for pipe diameters of various sizes.
The circular base of fig. 2 is mainly composed of a chassis with a diameter of 185mm and a thickness of 7mm and 4 sensor bins for placing sensors, wherein the size of the sensor bins is 51x19x19 mm. The center of the chassis is provided with a threaded hole with the diameter of 14mm for the threaded rod to pass through. Wherein, four threaded holes with the diameter of 6mm are arranged above each sensor bin and used for fixing the sensor by screws 6. And a hole with the diameter of 5mm is formed on the side, close to the axis, of each sensor bin, so that a sensor wire can conveniently pass through the sensor bin. The base is turned with internal threads, the small diameter is matched with threads on the main shaft, the large diameter is matched with threads on the crawler, and the base, the centering claw and the main shaft can be connected into a whole to improve the stability of the base.
In order to realize diameter-changing measurement, the sensor bins on the circular base are provided with an adjusting nut 14, when diameter-changing is needed, the adjusting nut is unscrewed, the position of the sensor is adjusted, the four sensor probes extend to uniform length until the four sensor probes can normally measure the pipe diameter, and the adjusting nut is screwed down after the position of the sensor is determined, so that diameter-changing is realized. In order to ensure that all the sensors are adjusted to the same position, scales are marked on the sensors, one sensor is adjusted, and the other sensors are adjusted according to the scales.
During the use, place displacement sensor in the sensor storehouse, use the screw fixation. And extruding a righting claw of the instrument to change the righting claw into a state with the minimum inner diameter and placing the righting claw into the pipeline, wherein the supporting arm automatically opens under the action of the spring after the righting claw enters the pipeline and props against the inner wall of the pipeline, so that the circle center position of the measuring system is the center position of the pipeline, and the measurement can be started at the moment.
The method comprises the following specific steps:
(1) and (3) placing the displacement sensor into a sensor bin of a circular base, adjusting the extending length of the sensor, and fixing the sensor bin by using screws.
(2) A centralizing claw is screwed in the front and the back of the connecting threaded rod respectively, one end of each centralizing claw is positioned by a nut, and the other end of each centralizing claw is additionally provided with a spring and is positioned by a limiting block, so that the centralizing claws have certain elasticity.
(3) And screwing the disc on which the displacement sensor is fixed into the front end of the connecting threaded rod, and fixing the position by using a nut.
(4) Before the pipe is sent into the pipeline, the front centralizing claw is extruded to the state of the minimum inner diameter and sent into the pipeline to be tested.
(5) After entering the pipeline, the righting claw keeps an open state under the action of the spring, the supporting arm props against the inner wall of the pipeline, and the detection system keeps a centering state.
(6) The detection mechanism advances in the pipeline and collects, stores and uploads data.
Springs are arranged between the base and the front centralizing claw as well as between the front centralizing claw and the rear centralizing claw, so that the centralizing claw keeps opening in a natural state and can be propped against the inner wall of the pipeline after being stressed in the pipeline, the integral structure is positioned at the center of the pipeline in the detection process, and the measured data is more accurate.
Claims (4)
1. The utility model provides a contact pipeline internal diameter detection mechanism, two right claws and middle connecting threaded rod around including, its characterized in that: the front end of the front centralizing claw is provided with a detection device which is a circular base, a sensor cabin is arranged on the circular base, a displacement sensor is placed in the sensor cabin, and an outer spring is sleeved on a connecting threaded rod between the front centralizing claw and the rear centralizing claw.
2. The mechanism of claim 1, wherein: four sensor bins are welded on the circular base, threaded holes are formed in the upper ends of the sensor bins, screws are screwed in the threaded holes, and the inner sides of the screws are connected with displacement sensors located in the sensor bins.
3. The mechanism of claim 1, wherein: the righting claw comprises a supporting seat, a supporting arm, an inner spring, a pulley, a fixed arm and a mounting seat, wherein the supporting seat is connected with a plurality of supporting arms through shaft pins, the tail end of the supporting arm is connected to the pulley shaft through the shaft pins, the pulley shaft is connected to the fixed arm, the tail end of the fixed arm is connected to the mounting seat through the shaft pins, the supporting seat is fixed to a connecting threaded rod, the mounting seat is sleeved on the connecting threaded rod in an empty mode, and the supporting seat and the mounting seat are connected through the inner spring.
4. A mechanism for detecting the internal diameter of a pipe as claimed in claim 3, wherein: at least three supporting arms and at least three pulleys are arranged on each righting claw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110306454.1A CN113155076A (en) | 2021-03-23 | 2021-03-23 | Contact type pipeline inner diameter detection mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110306454.1A CN113155076A (en) | 2021-03-23 | 2021-03-23 | Contact type pipeline inner diameter detection mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113155076A true CN113155076A (en) | 2021-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110306454.1A Pending CN113155076A (en) | 2021-03-23 | 2021-03-23 | Contact type pipeline inner diameter detection mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113155076A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115420174A (en) * | 2022-11-03 | 2022-12-02 | 山东乐普矿用设备股份有限公司 | Intelligent measuring device for inner diameter of hydraulic cylinder of heading machine |
-
2021
- 2021-03-23 CN CN202110306454.1A patent/CN113155076A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115420174A (en) * | 2022-11-03 | 2022-12-02 | 山东乐普矿用设备股份有限公司 | Intelligent measuring device for inner diameter of hydraulic cylinder of heading machine |
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