CN112379455A - Nondestructive testing method for trend, spacing and length of concealed pipelines in heating and cooling engineering - Google Patents
Nondestructive testing method for trend, spacing and length of concealed pipelines in heating and cooling engineering Download PDFInfo
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- CN112379455A CN112379455A CN202011096286.XA CN202011096286A CN112379455A CN 112379455 A CN112379455 A CN 112379455A CN 202011096286 A CN202011096286 A CN 202011096286A CN 112379455 A CN112379455 A CN 112379455A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to the technical field of hidden pipeline detection of heating and cooling projects, in particular to a nondestructive detection method for the trend, the distance and the length of hidden pipelines of a heating and cooling project. The nondestructive testing method can clearly obtain the laying layout of the underground concealed pipeline of the heating system or the cooling system, and provides more reliable technical support for searching the leakage point of the concealed pipeline; the nondestructive testing method can be used in the non-heating period and the non-cooling period, and adopts a method of carrying out fluid forced circulation on each loop pipeline of a heating system or a cooling system, so that fluid in the pipeline flows rapidly artificially, temperature difference is generated between the fluid in the pipeline and different surrounding media, and necessary conditions are created for imaging of the infrared thermal imager.
Description
Technical Field
The invention relates to the technical field of hidden pipeline detection in heating and cooling projects, in particular to a nondestructive detection method for the trend, the distance and the length of hidden pipelines in heating and cooling projects.
Background
In the radiation heating and cooling project, the pipeline is hidden under the ground, and leakage points can appear on the pipeline in the initial laying stage of the pipeline or after the heating or cooling operation is carried out for a certain time, so that the leakage points of the pipeline are searched by adopting an infrared thermal imager in the heating and cooling period. However, since the infrared thermal imager has a reflection effect on the material with a smooth surface, the floor tile veneer and the floor of the wood floor have a negative effect on the imaging of the underground pipeline, so that the imaging of the infrared thermal imager is not clear, even cannot be imaged in severe cases, and if the imaging cannot be performed, the direction, the distance and the length of the whole pipeline cannot be accurately mastered, and the leakage point of the pipeline cannot be searched or the construction acceptance data and the evidence data of judicial identification cannot be provided.
In addition, when the hidden pipeline under the ground of the radiation heating and cooling project is in a non-heating period and a non-cooling period, because the fluid is in a static or emptying state, the temperature of the fluid in the pipeline is the same as that of the surrounding medium, the infrared thermal imager can not image. Therefore, hidden pipeline leakage point detection cannot be carried out in the non-heating period and the non-cooling period.
Disclosure of Invention
The invention provides a nondestructive testing method for the direction, the distance and the length of concealed pipelines in heating and cooling projects, overcomes the defects of the prior art, and can effectively solve the problem that the direction, the distance and the length information of the pipelines are difficult to accurately grasp by the existing testing method for the concealed pipelines in heating and cooling projects.
The technical scheme of the invention is realized by the following measures: a nondestructive testing method for the trend, the distance and the length of concealed pipelines in heating and cooling projects is carried out according to the following method:
the method comprises the following steps that firstly, a water inlet end of a water pump is fixedly communicated with a water tank through a hose, a water outlet end of the water pump is fixedly communicated with a water inlet end of a water separator of a heating system or a cooling system through the hose, a water outlet end of a water collector of the heating system or the cooling system is fixedly communicated with the water tank through the hose, the water pump is started, water is conveyed to a hidden pipeline of the heating system or the cooling system hidden under the ground, and the water is enabled to continuously circulate in the hidden pipeline;
and secondly, continuously circulating water in the hidden pipeline until the temperature difference between the supplied water and the returned water can enable the infrared thermal imager to image, acquiring the infrared image of the hidden pipeline of the heating system or the cooling system hidden underground by the infrared thermal imager, and describing the laying layout of the hidden pipeline by adopting a marker according to the infrared image.
The following is further optimization or/and improvement of the technical scheme of the invention:
before the first step, the doors and windows of the user of the heating system or the cooling system are shielded.
In the second step, when the temperature difference between the feed water and the return water reaches more than 5 ℃, the infrared thermal imager can be used for imaging.
In the second step, the trend, the spacing and the length of the concealed pipeline are measured according to the depicted laying layout of the concealed pipeline.
And in the second step, after the laying layout of the hidden pipeline is clear, taking an infrared picture and taking a picture of the laying layout of the hidden pipeline.
The nondestructive testing method can clearly obtain the laying layout of the underground concealed pipeline of the heating system or the cooling system, and provides more reliable technical support for searching the leakage point of the concealed pipeline; the nondestructive testing method can be used in the non-heating period and the non-cooling period, and adopts a method of carrying out fluid forced circulation on each loop pipeline of a heating system or a cooling system, so that fluid in the pipelines flows rapidly artificially, temperature difference is generated between the fluid in the pipelines and different surrounding media, and necessary conditions are created for imaging of an infrared thermal imager; in addition, in the detection process, the fluid in the pipeline has no pressure, so that the leakage of the pipeline is avoided, and the ground is not damaged; the nondestructive testing method is not influenced by the ground surface layer, and can detect all hidden pipelines with different materials and structural layers and different thicknesses for underground heating and cooling.
Drawings
FIG. 1 is a schematic diagram of the connection of a water pump, a water tank and a water separator and a water collector of a heating system or a cooling system.
Fig. 2 is a photograph of a lay-up layout of a concealed pipeline.
The codes in the figures are respectively: 1 is a water pump, 2 is a water tank, 3 is a water separator, 4 is a water collector, 5 is a hidden pipeline, 6 is the ground, 7 is a water inlet hose, and 8 is a water return hose.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
The invention is further described below with reference to the following examples:
example 1: as shown in the attached figure 1, the nondestructive testing method for the trend, the distance and the length of the concealed pipeline in the heating and cooling project is carried out according to the following method:
firstly, fixedly communicating a water inlet end of a water pump 1 with a water tank 2 through a hose, fixedly communicating a water outlet end of the water pump 1 with a water inlet end of a water separator 3 of a heating system or a cooling system through a water inlet hose 7, fixedly communicating a water outlet end of a water collector 4 of the heating system or the cooling system with the water tank 2 through a water return hose 8, starting the water pump 1, and conveying water to a hidden pipeline 5 of the heating system or the cooling system hidden under the ground 6 to enable the water to continuously circulate in the hidden pipeline 5;
and secondly, continuously circulating water in the hidden pipeline 5 until the temperature difference between the supplied water and the returned water can enable the infrared thermal imager to image, acquiring the infrared image of the hidden pipeline 5 of the heating system or the cooling system hidden under the ground 6 by adopting the infrared thermal imager, and describing the laying layout of the hidden pipeline 5 by adopting a marker according to the infrared image.
The nondestructive testing method can clearly obtain the laying layout of the underground concealed pipeline 5 of a heating system or a cooling system, and provides more reliable technical support for searching the leakage point of the concealed pipeline 5; the nondestructive testing method can be used in the non-heating period and the non-cooling period, and adopts a method of carrying out fluid forced circulation on each loop pipeline (hidden pipeline 5) of a heating system or a cooling system, so that fluid in the pipeline flows rapidly to form temperature difference between the fluid in the pipeline and different surrounding media, and necessary conditions are created for imaging of an infrared thermal imager; in addition, in the detection process, the fluid in the pipeline has no pressure, so that the leakage of the pipeline cannot be caused, and the ground 6 cannot be damaged; the nondestructive testing method is not influenced by the ground surface layer, and can detect all hidden pipelines 5 with different materials and structural layers and different thicknesses for heating and cooling under the ground 6.
Furthermore, the run, pitch and length of the buried pipeline 5 can be measured from the depicted laying layout of the buried pipeline 5.
After the laying layout of the hidden pipes 5 is completely depicted, the water pump 1 is turned off.
Example 2: as optimization of the above embodiment, in order to prevent adverse effects of indoor and outdoor heat exchange on imaging of the infrared thermal imager, before the first step, the user door and window of the heating system or the cooling system is shielded.
The user's door and window of the heating system or the cooling system can be shielded by fabric such as cotton cloth or other shades.
Example 3: as the optimization of the above embodiment, in the second step, when the temperature difference between the feed water and the return water reaches above 5 ℃, the infrared thermal imager can be used for imaging.
Example 4: as an optimization of the above embodiment, in the second step, after the laying layout of the concealed pipeline 5 is clarified, an infrared picture is taken, and a picture of the laying layout of the concealed pipeline 5 is taken.
The whole ground 6 is shot by a digital camera to obtain a picture of the laying layout of the hidden pipeline 5 (see fig. 2, a white board pen is adopted to describe the laying layout of the hidden pipeline 5, and a white line represents the hidden pipeline 5), so that clear, accurate and complete visible data are obtained, and visible materials are provided for later pipeline maintenance; in addition, the method can be used as construction acceptance data and evidence data of judicial appraisal, and has the characteristics of visibility, intuition and accuracy.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (8)
1. A nondestructive testing method for the trend, the distance and the length of concealed pipelines in heating and cooling projects is characterized by comprising the following steps:
the method comprises the following steps that firstly, a water inlet end of a water pump is fixedly communicated with a water tank through a hose, a water outlet end of the water pump is fixedly communicated with a water inlet end of a water separator of a heating system or a cooling system through the hose, a water outlet end of a water collector of the heating system or the cooling system is fixedly communicated with the water tank through the hose, the water pump is started, water is conveyed to a hidden pipeline of the heating system or the cooling system hidden under the ground, and the water is enabled to continuously circulate in the hidden pipeline;
and secondly, continuously circulating water in the hidden pipeline until the temperature difference between the supplied water and the returned water can enable the infrared thermal imager to image, acquiring the infrared image of the hidden pipeline of the heating system or the cooling system hidden underground by the infrared thermal imager, and describing the laying layout of the hidden pipeline by adopting a marker according to the infrared image.
2. The method for nondestructive testing of the orientation, spacing and length of concealed piping in heating and cooling projects of claim 1 wherein prior to the first step, the doors and windows of the user of the heating system or cooling system are concealed.
3. The nondestructive testing method for the trend, the distance and the length of the concealed pipeline in the heating and cooling project according to claim 1 or 2, characterized in that in the second step, when the temperature difference between the feed water and the return water reaches more than 5 ℃, an infrared thermal imager can be used for imaging.
4. The nondestructive testing method for the orientation, spacing and length of concealed piping in heating and cooling engineering according to claim 1 or 2, wherein in the second step, the orientation, spacing and length of concealed piping are measured based on the depicted laying layout of concealed piping.
5. The nondestructive testing method for the orientation, spacing and length of concealed piping in heating and cooling engineering of claim 3 wherein in the second step, the orientation, spacing and length of concealed piping are measured according to the depicted concealed piping layout.
6. The nondestructive testing method for the orientation, the spacing and the length of the concealed pipelines in the heating and cooling project according to claim 1, 2 or 5, characterized in that in the second step, after the laying layout of the concealed pipelines is clear, an infrared picture is taken, and a picture of the laying layout of the concealed pipelines is taken.
7. The nondestructive testing method for the orientation, spacing and length of concealed pipelines in heating and cooling engineering of claim 3, wherein in the second step, after the laying layout of the concealed pipelines is clear, the infrared picture is taken, and the picture of the laying layout of the concealed pipelines is taken.
8. The nondestructive testing method for the orientation, spacing and length of concealed pipelines in heating and cooling engineering of claim 4, wherein in the second step, after the laying layout of the concealed pipelines is clear, the infrared picture is taken, and the picture of the laying layout of the concealed pipelines is taken.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011096286.XA CN112379455A (en) | 2020-10-14 | 2020-10-14 | Nondestructive testing method for trend, spacing and length of concealed pipelines in heating and cooling engineering |
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| CN202011096286.XA CN112379455A (en) | 2020-10-14 | 2020-10-14 | Nondestructive testing method for trend, spacing and length of concealed pipelines in heating and cooling engineering |
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| CN112379455A true CN112379455A (en) | 2021-02-19 |
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| CN202011096286.XA Pending CN112379455A (en) | 2020-10-14 | 2020-10-14 | Nondestructive testing method for trend, spacing and length of concealed pipelines in heating and cooling engineering |
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Cited By (1)
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| CN114627013A (en) * | 2022-03-11 | 2022-06-14 | 江阴嘉欧新材料有限公司 | Water pipe bridging density measurement system and method |
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