CN113494881A

CN113494881A - PE pipe thickness measuring device and method

Info

Publication number: CN113494881A
Application number: CN202110999398.4A
Authority: CN
Inventors: 高昆仑
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-29
Filing date: 2021-08-29
Publication date: 2021-10-12

Abstract

The invention relates to a PE pipe thickness measuring device and method, which effectively solve the problem that the thickness of any position of a PE pipe cannot be accurately measured; the technical scheme includes that the device comprises a cylindrical shell and a magnetic thickness gauge, the shell is transversely placed, a plurality of radial chambers are uniformly distributed on the circumference of the shell, a channel is formed in the center of the shell, a through groove is communicated with the chambers, the left end of the channel is connected with a first piston through a first pipeline, and the first piston is filled with liquid; scale marks are arranged on a piston rod of the first piston along the length direction, and a supporting structure is arranged in each cavity; the supporting structure comprises a supporting rod arranged in the cavity, a left elastic metal coil and a right elastic metal coil are fixed at the outer end of the supporting rod, an air bag is fixed in the middle of the supporting rod, and after the air bag is inflated, the sliding block moves outwards along the piston rod, so that the two supporting rods are unfolded and the metal coils are spread; the invention can carry out multi-point nondestructive detection on any position.

Description

PE pipe thickness measuring device and method

Technical Field

The invention relates to the technical field of PE pipe processing, in particular to a PE pipe thickness measuring device and method.

Background

For the thickness detection of the pipeline, the caliper is usually adopted for the conventional detection to detect the thickness of the end part of the pipeline, and the thickness of the middle part or any part of the pipeline cannot be detected. In addition, some devices use ultrasound to detect the thickness, but the devices can only be used for magnetic pipelines and can not be used for non-magnetic pipelines, and the ultrasound is easily interfered and the measurement is inaccurate. Therefore, the following problems mainly exist in the non-magnetic pipe thickness measurement of the PE pipe: 1. thickness detection cannot be carried out at any position of the non-magnetic pipeline; 2. how to adapt to pipelines with different diameters; 3. the single measurement mode and the single tool have misdetection, and cannot be contrasted and analyzed; 4. how to perform nondestructive detection without damaging the pipeline; 5. how quickly to make a reading.

Disclosure of Invention

In view of the above situation, in order to solve the problems in the prior art, the present invention aims to provide a PE tube thickness measuring device and method, which can effectively solve the problem that the thickness of the PE tube at any position cannot be accurately measured.

The technical scheme includes that the device comprises a cylindrical shell and a magnetic thickness gauge, the shell is transversely placed, a plurality of radial chambers are uniformly distributed on the circumference of the shell, a channel is formed in the center of the shell, a through groove is communicated with the chambers, the left end of the channel is connected with a first piston through a first pipeline, and the first piston is filled with liquid; scale marks are arranged on a piston rod of the first piston along the length direction, and a supporting structure is arranged in each cavity;

the supporting structure comprises a supporting rod arranged in the cavity, a left elastic metal coil and a right elastic metal coil are fixed at the outer end of the supporting rod, a sliding block capable of moving up and down along the supporting rod is installed on the supporting rod, a left supporting rod and a right supporting rod are hinged to the sliding block, a tension spring is connected between the left supporting rod and the right supporting rod, and the outer ends of the left supporting rod and the right supporting rod are respectively contacted with the inner side surfaces of the two metal coils; the middle part of the supporting rod is fixed with an air bag, after the air bag is inflated, the sliding block moves outwards along the piston rod, and then the two supporting rods are unfolded and the metal coil is unfolded;

the air bags on the plurality of supporting structures are connected together through hoses; the hose is communicated with a second piston.

The inner of every bracing piece all be provided with the rubber buffer.

The metal coil can be automatically coiled under the action of self elasticity.

The supporting rod is fixed with a fixed block, and the air bag is positioned between the fixed block and the sliding block.

In order to facilitate fixing, the first piston and the second piston are both provided with compression bolts.

The operation steps comprise:

the first step is as follows: inserting the shell into the to-be-tested pipeline, and firstly pushing the first piston to enable all the metal coils at the outer ends of the plurality of supporting rods to be in contact with the inner wall of the to-be-tested pipeline;

the second step is that: pushing the second piston to enlarge the air bag, pushing the sliding block to move outwards by the air bag, and extruding the metal coil by the supporting rod to realize that the metal coil is spread along the inner wall of the pipeline to be measured;

the third step: using a magnetic thickness meter to directly read the position of the metal coil spread on the inner wall of the outer side of the pipeline to be measured;

the fourth step: deducing all feed amounts of the support rods according to the feed amount of the first piston rod so as to obtain the average inner diameter of the pipeline, and measuring the outer diameter through a caliper so as to obtain the thickness;

the fifth step: and comparing the data obtained in the third step with the data obtained in the fourth step, and processing the data.

The invention has the advantages that:

1. the device is suitable for non-magnetic pipelines, and can carry out multi-point detection on any position without damaging the pipelines;

2. the device can be adaptive to pipelines with different diameters;

3. reading directly by a magnetic thickness meter, and calculating the thickness by the telescopic amount of the first piston; the two modes are compared, so that the numerical value is more accurate.

4. Meanwhile, the device is suitable for various non-magnetic pipelines, and the thickness can be measured regardless of the size.

Drawings

Fig. 1 is a front view of the present invention.

FIG. 2 is a left side sectional view of the present invention (before measurement).

Fig. 3 is a left side sectional view of the present invention (when measured).

Fig. 4 is a partially enlarged view of a portion a in fig. 2.

Fig. 5 is a partially enlarged view of fig. 3 at B.

Detailed Description

The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1 to 5, the magnetic thickness gauge comprises a cylindrical shell 1 and a magnetic thickness gauge 2, wherein the shell 1 is transversely placed, a plurality of radial chambers 3 are uniformly distributed on the circumference of the shell 1, a channel 4 is formed in the center of the shell 1, the through groove is communicated with the chambers 3, the left end of the channel 4 is connected with a first piston 5 through a first pipeline 10, and the first piston is filled with liquid; the piston rod of the first piston 5 is provided with scale marks 6 along the length direction, and a supporting structure 7 is arranged in each chamber 3;

the supporting structure 7 comprises a supporting rod 701 arranged in the chamber 3, a left elastic metal coil 702 and a right elastic metal coil 702 are fixed at the outer end of the supporting rod 701, a sliding block 703 capable of moving up and down along the supporting rod 701 is installed on the supporting rod 701, a left supporting rod 704 and a right supporting rod 704 are hinged on the sliding block 703, a tension spring 705 is connected between the left supporting rod 704 and the right supporting rod 704, and the outer ends of the left supporting rod 704 and the right supporting rod 704 are respectively contacted with the inner side surfaces of the two metal coils 702; an air bag 706 is fixed in the middle of the support rod 701, and after the air bag 706 is inflated, the sliding block 703 moves outwards along the piston rod, so that the two support rods 704 are expanded, and the metal coil 702 is unfolded;

the air bags 706 on the plurality of support structures 7 are connected together through hoses 709; the hose 709 is connected to a second piston 9.

In order to realize the propulsion of the support rods 701, the inner end of each support rod 701 is provided with a rubber plug 707.

In order to realize paving, the metal coil 702 can be automatically coiled under the action of self elasticity.

In order to facilitate the pushing of the sliding block 703, a fixing block 708 is fixed on the support rod 701, and the air bag 706 is positioned between the fixing block 708 and the sliding block 703.

For convenience of fixation, the first piston 5 and the second piston 9 are both provided with a compression bolt 8.

In order to realize the measurement, the operation steps comprise:

the first step is as follows: inserting the shell 1 into the pipe to be tested, firstly pushing the first piston 5 to make all the metal coils 702 at the outer ends of the plurality of support rods 701 contact with the inner wall of the pipe to be tested;

the second step is that: pushing the second piston 9 to enlarge the air bag 706, then the air bag 706 pushes the sliding block 703 to move outwards, and the supporting rod 704 is made to extrude the metal coil 702, so that the metal coil 702 is spread along the inner wall of the pipeline to be measured;

the third step: using a magnetic thickness meter 2 to directly read the position of the metal coil 702 with the spread inner wall at the outer side of the pipeline to be measured;

the fourth step: deducing all feed amounts of the support rods 701 according to the feed amount of the first piston 5, so as to obtain the average inner diameter of the pipeline, and measuring the outer diameter by using a caliper, so as to obtain the thickness;

The inner wall of the pipeline can be properly cleaned before measurement, and the influence on the accuracy of measurement caused by sundries on the inner wall of the pipeline can be avoided by flushing the inner wall with water flow.

When the invention is used, firstly, because the support rods 701 in the device have flexibility, before the device is used, the plurality of support rods 701 are in a state of being contracted in the shell 1, see the state shown in the attached figure 2, at this time, the device is small in size and is convenient to be directly placed in the pipeline to be measured. Moreover, the pipeline can be suitable for the pipeline within the setting range of the device regardless of the diameter, and the applicability is enhanced.

Then, since the channel in the housing 1 is connected to the first piston 5, by pressing the first piston 5, the liquid in the first piston 5 will enter the chamber 3 through the first pipe 10 and the channel 4, so that the plurality of support rods 701 in the plurality of chambers 3 move outwards at the same time; until the ends of the support rods 701 are blocked by the inner wall of the pipeline, the plurality of support rods 701 are uniformly stressed, so that the same feeding amount is maintained. When the support rod 701 cannot be fed, the position of the first piston 5 is fixed through the compression bolt 8; the positions of the plurality of support rods 701 are also fixed. At this time, the metal coil 702 at the end of the support rod 701 may contact the inner wall of the pipe, but the metal coil 702 is not fully expanded.

Then, by pressing the second piston 9, the second piston 9 can simultaneously open the air bags 706 on the plurality of support rods 701 through software, along with the opening of the air bags 706, the sliding blocks 703 on the support rods 701 can move outwards, and the tension springs 705 are connected between the left support rod 704 and the right support rod 704, as shown in fig. 4 and 5, so that the two support rods 704 can be in a state of being close to each other, but the ends of the support rods 704 are blocked by the inside of the pipeline, and therefore the support rods cannot be close to each other. This ensures that the ends of the rods 704 will only be pressed against the coil 702 and as the slider 703 is advanced, the angle between the rods 704 increases and the outer ends of the rods 704 push the coils 702 apart.

After the coil 702 is expanded, a layer of metal can be applied to the inner wall of the pipe. And can adapt to the metal coils 702 with different inner diameters according to the different inner diameters of the pipelines and the different expanding lengths of the metal coils 702. Then, the magnetic thickness gauge 2 can be used to measure the outer wall of the pipe at the position aligned with the metal coil 702, and the thickness value can be displayed according to the difference of the pipe thickness and the magnetism detected by the magnetic thickness gauge 2.

By comparing the thicknesses at a plurality of locations, an average of the thicknesses can be calculated.

In addition, since the liquid in the first piston 5 is incompressible, the feed amount of the plurality of support rods 701 can be calculated by the feed amount of the first piston 5, and then the average inner diameter can be calculated according to parameters such as the design diameter of the housing 1; and then measuring the outside diameter of the pipeline by a caliper, and calculating the thickness by the difference value of the inside diameter and the outside diameter.

Through the thickness that 2 direct readings of magnetism thickness gauge and calculation, contrast, can be more accurate reachs the thickness value, reduced the operation error.

Claims

1. A PE pipe thickness measuring device comprises a cylindrical shell (1) and a magnetic thickness gauge (2), and is characterized in that the shell (1) is transversely placed, a plurality of radial cavities (3) are uniformly distributed on the shell (1) in the circumferential direction, a channel (4) is formed in the center of the shell (1), the through groove is communicated with the cavities (3), the left end of the channel (4) is connected with a first piston (5) through a first pipeline (10), and the first piston is filled with liquid; scale marks (6) are arranged on a piston rod of the first piston (5) along the length direction, and a supporting structure (7) is arranged in each chamber (3);

the supporting structure (7) comprises a supporting rod (701) arranged in the chamber (3), a left elastic metal coil and a right elastic metal coil (702) are fixed at the outer end of the supporting rod (701), a sliding block (703) capable of moving up and down along the supporting rod (701) is installed on the supporting rod (701), a left supporting rod and a right supporting rod (704) are hinged on the sliding block (703), a tension spring (705) is connected between the left supporting rod and the right supporting rod (704), and the outer ends of the left supporting rod and the right supporting rod (704) are respectively contacted with the inner side surfaces of the two metal coils (702); an air bag (706) is fixed in the middle of the supporting rod (701), after the air bag (706) is inflated, the sliding block (703) moves outwards along the piston rod, and then the two supporting rods (704) are unfolded and the metal coil (702) is unfolded;

the air bags (706) on the plurality of supporting structures (7) are connected together through hoses (709); the hose (709) is communicated with a second piston (9).

2. A PE pipe thickness measuring device as claimed in claim 1, wherein a rubber plug (707) is provided at the inner end of each support rod (701).

3. A PE pipe thickness measuring device as claimed in claim 1, wherein the metal coil (702) is capable of being automatically coiled under its own elastic force.

4. The PE pipe thickness measuring device according to claim 1, wherein a fixing block (708) is fixed on the support rod (701), and the air bag (706) is positioned between the fixing block (708) and the sliding block (703).

5. A PE pipe thickness measuring device according to claim 1, characterized in that the first piston (5) and the second piston (9) are each provided with a hold-down bolt (108).

6. A method for using a PE pipe thickness measuring device according to any one of claims 1-5, comprising the steps of:

the first step is as follows: the shell (1) is plugged into the pipe to be tested, and the metal coils (702) at the outer ends of the support rods (701) are all contacted with the inner wall of the pipe to be tested by pushing the first piston (5);

the second step is that: pushing the second piston (9) to enlarge the air bag (706), then pushing the sliding block (703) to move outwards by the air bag (706), and enabling the support rod (704) to extrude the metal coil (702), so that the metal coil (702) is spread along the inner wall of the pipeline to be measured;

the third step: using a magnetic thickness meter (2) to directly read the position of a metal coil (702) with the spread inner wall at the outer side of the pipeline to be measured;

the fourth step: deducing all feed amounts of the support rods (701) through the feed amount of the first piston (5) rod so as to obtain the average inner diameter of the pipeline, and measuring the outer diameter through a caliper so as to obtain the thickness;