CN113720549B - Detection method of sealing material - Google Patents
Detection method of sealing material Download PDFInfo
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- CN113720549B CN113720549B CN202111079242.0A CN202111079242A CN113720549B CN 113720549 B CN113720549 B CN 113720549B CN 202111079242 A CN202111079242 A CN 202111079242A CN 113720549 B CN113720549 B CN 113720549B
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- 239000003566 sealing material Substances 0.000 title claims abstract description 70
- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 127
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000004088 simulation Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000002474 experimental method Methods 0.000 description 14
- 239000002184 metal Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The application relates to a detection method of a sealing material, comprising the following steps: s1: manufacturing an experimental frame, wherein the experimental frame is made of a material which is in an actual application environment with the sealing material, and experimental holes for filling the sealing material are reserved in the experimental frame; s2: filling the experimental hole with a sealing material; s3: sealing covers are covered at the upper end and the lower end of the experimental frame and are sealed and fixed; s4: an air hole and a detection hole are formed in at least one sealing cover, the air hole is communicated with the pressure supply device, and the detection hole is communicated with the flowmeter or the pressure gauge; s5: the pressure supply device inputs air pressure into the sealing cover, and the air pressure value is measured according to the pressure appearance; s6: the flow meter parameter changes are observed over time and the time and parameter values are recorded. The real working environment of the sealing material is simulated through the experimental framework, the tightness of the sealing material is detected, the detection result is accurate, and the sealing performance of the material is ensured.
Description
Technical Field
The application relates to the field of detection, in particular to a detection method of a sealing material.
Background
At present, the sealing material is widely applied to various fields, such as construction, nuclear power, military industry and the like.
In the nuclear power industry, the sealing properties of the material are particularly important, and once leakage occurs, the consequences are difficult to measure. And some walls and the like used in the nuclear power industry are manufactured in a building mode.
When the construction industry is working, holes or holes are reserved on the wall or floor for laying pipelines or lines, and the reserved holes or holes are required to be plugged by sealing materials after corresponding operation is completed. The sealing performance of the sealing materials often lacks an effective experimental means for detection, and the sealing performance of the materials is difficult to ensure.
Disclosure of Invention
In order to test the performance of the sealing material, the application provides a detection method of the sealing material.
The application provides a detection method of a sealing material, which adopts the following technical scheme:
1. a method of detecting a sealing material, comprising:
s1: manufacturing an experimental frame, wherein the experimental frame is made of a material which is in an actual application environment with the sealing material, and experimental holes for filling the sealing material are reserved in the experimental frame;
s2: filling the experimental hole with a sealing material;
s3: sealing covers are covered at the upper end and the lower end of the experimental frame and are sealed and fixed;
s4: an air hole and a detection hole are formed in at least one sealing cover, the air hole is communicated with the pressure supply device, and the detection hole is communicated with the flowmeter or the pressure gauge;
s5: the pressure supply device inputs air pressure into the sealing cover, and the air pressure value is measured according to the pressure appearance;
s6: the flow meter parameter changes are observed over time and the time and parameter values are recorded.
By adopting the technical scheme, an operator makes an experimental frame according to actual field conditions, so that the detection accuracy is ensured. For example, the wall or the building on site is made of concrete, an experimental frame is poured by the same concrete, sealing materials are filled into practical holes, the periphery of the sealing materials are sealed by the experimental frame, the upper end and the lower end of the sealing materials are sealed by sealing covers, the sealing covers are pressurized, leakage quantity and leakage speed are observed through a flowmeter, and therefore the performance of the sealing materials is tested. The real working environment of the sealing material is simulated through the experimental framework, the tightness of the sealing material is detected, the detection result is accurate, and the sealing performance of the material is ensured.
Optionally, in the step S5, before measurement, the tightness of the seal covers is detected, both seal covers are provided with air holes and detection holes, and the two seal covers are respectively called a pressure cover and a back pressure cover, and the pressure cover and the back pressure cover are connected with a pressure gauge and a pressure supply device; introducing air pressure with certain pressure on the pressure cover, and observing whether the reading of the pressure gauge is accurate and stable; and (3) introducing air pressure with certain pressure on the back pressure cover, and observing whether the reading of the pressure gauge is accurate and stable.
By adopting the technical scheme, before formal experiments, certain pressure is filled into two sides of the sealing material for observation so as to detect the tightness of the whole experimental frame and prevent the leakage of the experimental frame from affecting the detection of the performance of the sealing material.
Optionally, in the step S5, after the detection, the pressure P is introduced into the pressure-receiving cover 1 Is introduced into the back pressure cover with the pressure of P 2 Thereby forming a pressure difference P 3 Pressure difference P 3 For the pressure difference of two sides in the practical sealing material working environment, the test time is t, the flowmeter is observed, and the leakage gas quantity q is recorded t The contact length of the sealing material and the experimental frame is L, and the compression area of the sealing material is S;
leakage rate q l =q t /(t x L); leakage rate q s =q t /（t*S）。
By adopting the technical scheme, the pressure difference is formed at the two sides of the sealing material, the real working environment of the sealing material is simulated, the leakage quantity of gas is detected, and the leakage quantity is calculated through a calculation formula, so that the sealing performance of the sealing material is quantized, and the sealing material is more visual and accurate. Moreover, the leakage rate of the sealing material is evaluated by two calculation modes, so that the sealing material is more comprehensive.
Optionally, the experiment frame includes prefabricated frame and sealing frame, and sealing frame arranges in prefabricated frame, and prefabricated frame is built by the material of sealing material practical application environment, and the experimental hole is seted up in sealing frame, and sealing frame fretwork all around.
Through adopting above-mentioned technical scheme, sealing frame places in prefabricated frame, to the filling material in the prefabricated frame, pours and forms prefabricated frame, and filling material can fill sealing to sealing frame all around through sealing frame all around simultaneously, and at this moment, sealing frame and prefabricated frame form an organic wholely, and the leakproofness is better between the two to reduce the leakage condition of experimental frame itself, improve experimental accuracy.
Optionally, the sealing cover is in sealing connection with the sealing frame, and an annular sealing strip is arranged between the sealing cover and the sealing frame.
By adopting the technical scheme, the sealing strip enhances the sealing performance between the sealing cover and the sealing frame, thereby improving the experimental precision.
Optionally, the sealing cover is provided with a first sealing strip, the sealing frame is provided with a second sealing strip, and the first sealing strip and the second sealing strip are staggered.
Through adopting above-mentioned technical scheme, twice sealing strip forms double-deck seal structure, further improves the leakproofness of experimental frame itself, guarantees experimental accuracy.
Optionally, a simulation support rod for simulating a circuit is arranged in the experiment hole.
By adopting the technical scheme, the simulation support rod further improves the authenticity of the working scene of the sealing material, thereby improving the authenticity of experimental data.
Optionally, a blind hole is formed in the sealing cover, one end of the simulation supporting rod is inserted into the blind hole, and the other end of the simulation supporting rod extends into the experimental hole.
Through adopting above-mentioned technical scheme, in the actual scene, have circuit or pipeline in some reserved holes, have in some reserved holes, the experimenter carries out simulation experiment according to the scene actual conditions, and whether the simulation branch is installed by oneself to the selection, convenient to use improves the authenticity.
Optionally, a drain pipe is connected to the sealing cover.
By adopting the technical scheme, when the water pressure needs to be simulated, certain water needs to be introduced into the sealing cover, and the water pressure is simulated by introducing air pressure. After the detection is finished, the water in the sealing cover is discharged through the drain pipe, so that the water flow is prevented from overflowing.
Detailed Description
The embodiment of the application discloses a detection method of a sealing material, which comprises the following steps of
S1: and manufacturing an experiment frame, wherein the experiment frame consists of two parts, including a sealing frame and a prefabricated frame.
Here, the material in the environment where the sealing material is practically used is referred to as a filler material. The prefabricated frame is made of filling material, and the sealing frame is made of metal material. For example, in practical application, the sealing material needs to fill a hole in a wall body, and the wall body is made of concrete, so that the prefabricated frame is made of concrete; if the wall body is made of other materials, the prefabricated frame is made of corresponding materials, the actual environment of the sealing material is simulated, and the authenticity of experimental data is improved.
The sealing frame is made of metal, the periphery of the sealing frame is hollowed out, and experimental holes are reserved in the middle of the sealing frame. The upper and lower projections of the sealing frame are in a shape of a Chinese character 'hui', and through holes are drilled on the upper and lower surfaces of the sealing frame and are used for installing bolts.
When the experimental frame is manufactured, the four templates are enclosed into a shape like a Chinese character 'kou', the sealing frame is placed at the center of the templates, the four templates II are placed in the experimental hole in the middle of the sealing frame, and the experimental hole is shaped. Filling material is poured into the first template, and flows into the first template until reaching the second template.
And after the filling material is solidified and cured, removing the first template and the second template. The sealing frame is embedded in the prefabricated frame and integrally connected with the prefabricated frame, the sealing performance between the sealing frame and the prefabricated frame is good, and experimental holes are formed.
The two sides of the experimental frame are provided with sealing covers matched with the experimental frame, and the middle of the sealing cover arches towards the direction away from the experimental frame to form a certain cavity, so that the subsequent pressurization is facilitated. Connecting holes corresponding to the sealing frames one by one are drilled around the sealing cover.
A plurality of blind holes which are opposite to the experimental holes are formed in one face, facing the experimental frame, of the inner wall of the sealing cover. The blind hole is internally inserted with a simulation supporting rod for simulating a circuit. One end of the simulation supporting rod is inserted into the blind hole, the other end of the simulation supporting rod extends into the experimental hole and is used for simulating a line or a pipeline on an actual wall, if no pipeline or leakage exists in the actual wall, the simulation supporting rod is removed, and the use is convenient. The experimenter can select according to the actual situation.
In addition, when the experimental frame is manufactured, a part of metal reserved on the sealing frame can be stretched into the experimental hole, and then the simulation supporting rod is inserted into the experimental hole to be welded with the reserved metal, so that the simulation supporting rod is fixed. Or the experimental hole can be filled with a supporting frame, a plurality of joints used for being connected with the simulation supporting rod are arranged on the supporting frame, and the simulation supporting rod and the joints can be welded.
S2: filling the sealing material, and firstly filling the sealing material into the experimental hole by an experimenter, compacting and filling.
And S3, covering the sealing covers by covering the sealing covers on two sides of the experimental frame after the experimental personnel fills the sealing materials if no line or pipeline exists in the actual wall body. The connecting holes on the sealing cover are opposite to the through holes on the experimental frame one by one, and the experimental frame and the sealing cover are locked by bolts.
If a line or a pipeline exists in the actual wall body, an experimenter firstly inserts the simulation supporting rod into one of the sealing covers and covers the sealing cover on the experimental frame, so that the end part of the simulation supporting rod extends into the experimental hole, and then the experimenter fills the sealing material into the experimental hole and compacts and fills the experimental hole. The sealing material wraps the simulation strut. And covering the sealing cover on the other side, and fixing and locking the sealing cover and the experimental frame through bolts.
The upper surface and the lower surface of the sealing frame are provided with annular sealing grooves, and annular sealing strips II are arranged in the sealing grooves; an annular groove is formed in one face, facing the sealing frame, of the sealing cover, a sealing strip I is arranged in the annular groove, the sealing strip I is staggered with the sealing strip II, and the sealing strip I and the sealing strip II are not overlapped. After the sealing cover and the sealing frame are locked through the bolt lock, the first sealing strip and the second sealing strip seal the gap between the sealing cover and the sealing frame, so that the tightness between the sealing cover and the sealing frame is improved, and the accuracy of experimental data is ensured. The sealing strip can be made of rubber, silica gel and the like.
S4: the connection and detection are respectively called a pressure cover and a back pressure cover, and two holes, namely an air hole and a detection hole, are respectively formed in the pressure cover and the back pressure cover.
S4.1: and the pressure supply device is independently communicated with air holes on the two sealing covers, and the two pressure gauges are selected to be respectively connected with detection holes on the pressure cover and the back pressure cover.
S4.2: the tightness of the whole experimental frame is required to be detected before the experiment is formally started, so that the experiment can be formally performed after no error is ensured, and the leakage of the experimental frame is prevented from affecting the detection data of the actual sealing material.
During detection, quantitative air pressure is introduced into the back pressure cover, the specific value of the partial air pressure can be controlled through the pressure supply device, for example, 10Pa air pressure is introduced, an experimenter reads the pressure gauge on the back pressure cover, and whether the reading is stable and accurate is observed. In the same way, the same test is carried out on the pressure cover, the air pressure value of the introduced air pressure can be adjusted, for example, 100Pa air pressure is formed, the pressure difference is formed, and the detection accuracy is improved. If the readings on the two pressure gauges are stable and accurate, the tightness of the experimental frame is better, and the experiment can be carried out; if the readings of one or two pressure gauges do not meet the stable and accurate conditions, the tightness of the experimental frame is problematic, the experiment cannot be performed, and leakage points should be checked or the experimental frame should be manufactured again.
S5: in the pressure test, the sealing material has two general conditions for sealing in the actual working environment, namely sealing against air and sealing against water.
S5.1: the air seal experiment is generally divided into two types, one is a normal air seal, and the other is a special other seal. The experimenter selects corresponding gas according to the actual working environment of the sealing material. The experimenter introduces gas into the pressure-receiving cover to form pressure P 1 Is introduced into the back pressure cover with the pressure of P 2 And the pressure in the two sealing covers is kept constant by the pressure supply device. A pressure difference P is formed between the two 3 Differential pressure P 3 Is the pressure difference of two sides of the sealing material in the actual working environment. And (3) performing actual simulation, and improving the authenticity of experimental data.
S5.2: in the water sealing experiment, an experimenter firstly injects a certain amount of water into the pressure-bearing cover through the pressure-supply device, and the water quantity is required to be at least paved on the surface of the sealing material.
The length, width and height of the arched part of the sealing cover away from the sealing frame are as follows: l, d, h; the water quantity is l x d x k (0 < k < h).
After water injection, the experimenter injects gas into the pressurized cover to form air pressure, the gas presses water, and the water presses the sealing material, so that the water pressure is simulated. Whether the air pressure in the back pressure cover is introduced or not and the introduced pressure can be determined according to the actual working environment of the sealing material.
Wherein, the side of pressurized cover is connected with the drain pipe, installs the control valve on the drain pipe. When the water sealing experiment is finished, the control valve is opened to discharge the water flow in the pressurized cover, and then the sealing cover is removed to prevent the water flow from overflowing and influence the experiment environment.
S6: reading and analyzing data; after the pressure is introduced, maintaining constant pressure output, setting the test time as t (the unit is h), observing a flowmeter on a back pressure cover, and recording the leakage gas quantity q t (unit is m 3 ) Wherein the contact length of the sealing material with the experimental frame is L (in m), the compression area of the sealing material is S (in m 2 ) The leak rate is converted to:
q l =q t /(t.L), where q l The units of (2) are: m2/h;
q s =q t /(t.s), where qs is in units of: m/h.
Finally, the experiment is recorded and experimental data are output: q l And q s 。
S7: and (3) dismantling the sealing cover from the sealing frame, and finishing experimental data and experimental devices.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (7)
1. A detection method of sealing material is characterized in that: comprising the following steps:
s1: manufacturing an experimental frame, wherein the experimental frame is made of a material which is in an actual application environment with the sealing material, and experimental holes for filling the sealing material are reserved in the experimental frame;
s2: filling the experimental hole with a sealing material;
s3: sealing covers are covered at the upper end and the lower end of the experimental frame and are sealed and fixed;
s4: the two sealing covers are provided with air holes and detection holes, the air holes are communicated with the pressure supply device, and the detection holes are communicated with the flowmeter or the pressure gauge;
s5: the pressure supply device inputs air pressure into the sealing cover, and the air pressure value is measured according to the pressure appearance;
before measurement, the tightness of the sealing covers is detected, and the two sealing covers are respectively called a pressed cover and a back pressure cover, wherein the pressed cover and the back pressure cover are connected with a pressure gauge and a pressure supply device; introducing air pressure with certain pressure on the pressure cover, and observing whether the reading of the pressure gauge is accurate and stable; introducing air pressure with certain pressure on the back pressure cover, and observing whether the reading of the pressure gauge is accurate and stable;
after the detection, the pressure P is introduced into the pressure-receiving cover 1 Is introduced into the back pressure cover with the pressure of P 2 And the pressure in the two sealing covers is kept constant by the pressure supply device, and a pressure difference P is formed between the two sealing covers 3 Pressure difference P 3 In order to achieve the pressure difference of two sides in the working environment of the practical sealing material, after the pressure is introduced, the constant output of the pressure is maintained, the test time is t, the flowmeter is observed, and the leakage gas quantity q is recorded t The contact length of the sealing material and the experimental frame is L, and the compression area of the sealing material is S;
leakage rate q l =q t /(t x L); leakage rate q s =q t /（t*S）；
S6: the flow meter parameter changes are observed over time and the time and parameter values are recorded.
2. The method for detecting a sealing material according to claim 1, wherein: the experimental frame comprises a prefabricated frame and a sealing frame, wherein the sealing frame is arranged in the prefabricated frame, the prefabricated frame is made of materials in the practical application environment of sealing materials, experimental holes are formed in the sealing frame, and the periphery of the sealing frame is hollowed out.
3. The method for detecting a sealing material according to claim 2, wherein: the sealing cover is connected with the sealing frame in a sealing way, and an annular sealing strip is arranged between the sealing cover and the sealing frame.
4. A method of detecting a sealing material according to claim 3, wherein: the sealing cover is provided with a first sealing strip, the sealing frame is provided with a second sealing strip, and the first sealing strip and the second sealing strip are staggered.
5. The method for detecting a sealing material according to claim 1, wherein: and the experimental hole is internally provided with an analog supporting rod for simulating a circuit.
6. The method for detecting a sealing material according to claim 5, wherein: a blind hole is formed in the sealing cover, one end of the simulation supporting rod is inserted into the blind hole, and the other end of the simulation supporting rod extends into the experimental hole.
7. The method for detecting a sealing material according to claim 1, wherein: the sealing cover is connected with a drain pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111079242.0A CN113720549B (en) | 2021-09-15 | 2021-09-15 | Detection method of sealing material |
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| CN202111079242.0A CN113720549B (en) | 2021-09-15 | 2021-09-15 | Detection method of sealing material |
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| CN113720549B true CN113720549B (en) | 2024-01-26 |
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| CN113720549A (en) | 2021-11-30 |
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