CN111678657A - Air leakage field detection method for civil air defense engineering protection equipment - Google Patents
Air leakage field detection method for civil air defense engineering protection equipment Download PDFInfo
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- CN111678657A CN111678657A CN201910931536.8A CN201910931536A CN111678657A CN 111678657 A CN111678657 A CN 111678657A CN 201910931536 A CN201910931536 A CN 201910931536A CN 111678657 A CN111678657 A CN 111678657A
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- 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
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Abstract
The invention provides a field detection method for air leakage of civil air defense engineering protection equipment, which utilizes a sealing film to cover the whole protection equipment and seals along an outer frame, a sealing plate is arranged at the inner side of the protection equipment, positive and negative pressure is applied in a static pressure box formed between the sealing film and the sealing plate to measure additional air permeability, after the sealing film is removed, positive and negative pressure is applied in the static pressure box formed between the protection equipment and the sealing plate to measure total air permeability, and then the sum of the air leakage per unit length and unit area is calculated, thereby realizing the field detection of the air leakage of the protection equipment, solving the problem that the detection can only be realized in a test room or a production workshop of the protection equipment, improving the detection efficiency and ensuring the reliability and safety of the civil air defense engineering protection equipment.
Description
Technical Field
The invention relates to the technical field of civil air defense engineering detection, in particular to a field detection method for air leakage of civil air defense engineering protection equipment.
Background
The civil air defense engineering protection equipment is mainly used for blocking various destructive factors such as shock waves, biological warfare agents, chemical warfare agents, electromagnetic pulses, shrapnels, nuclear radiation and the like in wartime, so that air leakage is an important assessment index of the use performance of the civil air defense engineering protection equipment.
The civil air defense engineering oral area generally is provided with protective equipment, and protective airtight door is formed with the airtight unit of protection between protective equipment, in order to guarantee to form the airtight unit of protection between the protective equipment, needs airtight processing between the protective equipment of installing on the door frame wall and the door frame wall, and the pipeline such as the water pipe that passes the door frame wall simultaneously, cable also needs airtight processing. Common air tightness performance detection methods comprise a flow method and a pressure difference method, but the methods can only be realized in a laboratory or a protective equipment production workshop at present, and the air tightness performance detection requirements on the air-tight door on an installation engineering site cannot be met.
Disclosure of Invention
The invention aims to provide a field detection method for air leakage of civil air defense engineering protection equipment, which aims to solve the problem that detection can only be realized in a laboratory or a protection equipment production workshop in the prior art, improve the detection efficiency and ensure the reliability and safety of the civil air defense engineering protection equipment.
In order to achieve the technical purpose, the invention provides a field detection method for air leakage of civil air defense engineering protection equipment, which comprises the following steps:
s1, measuring the length and the area of an opening seam of the protective equipment;
s2, covering the whole protection equipment with a sealing film, sealing along the outer frame, and installing a sealing plate on the inner side of the protection equipment;
s3, applying positive and negative pressure to a static pressure box formed between the sealing film and the sealing plate, and measuring the additional air permeation amount;
s4, after the sealing film is removed, applying positive pressure and negative pressure to a static pressure box formed between the protective equipment and the sealing plate, and measuring the total air permeation amount;
and S5, calculating the sum of the unit seam length and the air leakage amount per unit area according to the additional air permeability and the total air permeability.
Preferably, the applying of the positive and negative pressure between the sealing film and the sealing plate is specifically:
the method comprises the following steps of firstly carrying out preliminary pressurization, and respectively applying three pressure difference pulses before positive and negative pressure detection, wherein the absolute value of the pressure difference is 150Pa, the pressurization speed is 50Pa/s, the pressure difference stabilization action time is not less than 3s, and the pressure release time is not less than 1 s;
pressurizing step by step, wherein the acting time of each step of pressure is 10s, and positive pressure step by step is firstly performed, and then negative pressure step by step is performed.
Preferably, the applying of positive and negative pressure between the protective equipment and the sealing plate is specifically:
the method comprises the following steps of firstly carrying out preliminary pressurization, and respectively applying three pressure difference pulses before positive and negative pressure detection, wherein the absolute value of the pressure difference is 150Pa, the pressurization speed is 50Pa/s, the pressure difference stabilization action time is not less than 3s, and the pressure release time is not less than 1 s;
pressurizing step by step, wherein the acting time of each step of pressure is 10s, and positive pressure step by step is firstly performed, and then negative pressure step by step is performed.
Preferably, the air permeation quantity is measured by a flow measuring device on the pipeline.
Preferably, the additional air permeation is an air permeation through the sealing membrane and the sealing plate and the connecting seam between the parts, in addition to an air permeation through the shielding device itself.
Preferably, the evaluation of the air leakage detection result is that the sum of the unit seam length and the air leakage per unit area is not greater than the maximum allowable air leakage.
The effect provided in the summary of the invention is only the effect of the embodiment, not all the effects of the invention, and one of the above technical solutions has the following advantages or beneficial effects:
compared with the prior art, the invention utilizes the sealing film to cover the whole protection device and seals along the outer frame, the sealing plate is arranged at the inner side of the protection device, positive and negative pressure is applied in the static pressure box formed between the sealing film and the sealing plate to measure the additional air permeation quantity, and after the sealing film is removed, positive and negative pressure is applied to the static pressure box formed between the protection device and the sealing plate to measure the total air permeation quantity, so that the sum of the unit seam length and the air leakage quantity of the unit area is calculated, thereby realizing the field detection of the air leakage quantity of the protection device, solving the problem that the detection can only be realized in a test room or a protection device production workshop, improving the detection efficiency and ensuring the reliability and safety of the civil air defense engineering protection device.
Drawings
Fig. 1 is a flowchart of a field air leakage detection method for a civil air defense engineering protection device provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an air leakage detecting device according to an embodiment of the present invention;
FIG. 3 is a sequence diagram of a leak detection pressure difference provided in an embodiment of the present invention;
in the figure, 1-wall body, 2-protective equipment, 3-sealing film, 4-sealing plate, 5-pressure gauge, 6-air supply system and 7-flow detection equipment.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
The following describes a method for detecting air leakage of civil air defense engineering protection equipment on site in detail with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the invention discloses a field detection method for air leakage of civil air defense engineering protection equipment, which comprises the following steps:
s1, measuring the length and the area of an opening seam of the protective equipment;
s2, covering the whole protection equipment with a sealing film, sealing along the outer frame, and installing a sealing plate on the inner side of the protection equipment;
s3, applying positive and negative pressure between the sealing film and the sealing plate, and measuring the additional air permeation amount;
s4, after the sealing film is removed, applying positive pressure and negative pressure between the protective equipment and the sealing plate, and measuring the total air permeation quantity;
and S5, calculating the sum of the unit seam length and the air leakage amount per unit area according to the additional air permeability and the total air permeability.
In the embodiment of the invention, a static pressure box is formed by utilizing a sealing plate, a building enclosure and civil air defense engineering protection equipment, such as a protection door and the like on site, positive pressure difference or negative pressure difference is formed on two sides of a detection object by exhausting air from the static pressure box or blowing air to the static pressure box through an air supply system, a measuring hole is led out of the static pressure box to measure the pressure difference, and a flow measuring device is arranged on a pipeline to measure the air permeability, as shown in figure 2.
Before detecting, it is necessary to ensure that the protective equipment and the connecting part are installed to reach a normal use state, and the three frames of the same specification and the same model are selected as a group for the test piece to be detected, and the three frames with insufficient quantity are detected by one frame. In addition, the environmental condition record during the air leakage detection should include atmospheric pressure and temperature, and when the environmental conditions such as temperature, wind speed and rainfall affect the detection result, the detection should be continued after eliminating the interference factors.
Before the air leakage field detection, the area of the protective equipment and the length of an opening seam are measured, the area of the special-shaped protective equipment is calculated according to the expansion area, the whole protective equipment range is covered by a transparent plastic film with the thickness not less than 1.0mm from the inner side of the test piece and is sealed along the outer frame of the test piece, and the sealing plastic film is not reused. And a sealing plate is arranged on the window opening on the inner side of the test piece, and the sealing of the sealing plate is ensured to be good.
In the detection process, preliminary pressurization is carried out, three differential pressure pulses are respectively applied before positive and negative pressure detection, the absolute value of the differential pressure is 150Pa, the pressurization speed is about 50Pa/s, the differential pressure stabilization action time is not less than 3s, the pressure relief time is not less than 1s, and the sealing states of the sealing plate and the transparent film are checked. The additional permeate was measured and, as shown in fig. 3, the pressure was increased stepwise, each stage of pressure acting for about 10s, positive pressure was applied stepwise first, and negative pressure was applied stepwise later, and the measured values at each stage were recorded. The additional air permeation amount means an air permeation amount through the seal film and the seal plate and the joint line between the respective portions in addition to an air permeation amount through the test piece itself. Measuring total air permeability, opening a sealing plate inspection door, closing the inspection door after removing a sealing film added on a test piece, sealing and then detecting, also performing preliminary pressurization and then positive and negative pressure detection, namely respectively applying three differential pressure pulses before the positive and negative pressure detection, wherein the absolute value of the differential pressure is 150Pa, the pressurization speed is about 50Pa/s, the differential pressure stabilization action time is not less than 3s, the pressure relief time is not less than 1s, then the pressurization is performed step by step, the action time of each stage of pressure is about 10s, the positive pressure is performed step by step first, the negative pressure is performed step by step later, and measurement values of all stages are recorded through a flow measurement device.
And for the evaluation of the air leakage detection result, judging according to the maximum allowable air leakage, namely that the sum of the unit seam length and the air leakage of the unit area is not greater than the maximum allowable air leakage.
In addition, performance evaluation and classification can be carried out on the protective equipment through air leakage, the air permeation quantity of the protective equipment per unit seam length or the air permeation quantity of the protective equipment per unit area under the pressure difference of 10Pa are evaluated, and the classification value of the air leakage is in accordance with the content of the table 1.
TABLE 1
The embodiment of the invention utilizes the sealing film to cover the whole protection device and seals along the outer frame, the sealing plate is arranged at the inner side of the protection device, positive and negative pressure is applied in the static pressure box formed between the sealing film and the sealing plate to measure the additional air permeation quantity, and after the sealing film is removed, positive and negative pressure is applied to the static pressure box formed between the protection device and the sealing plate to measure the total air permeation quantity, so that the sum of the unit seam length and the air leakage quantity of the unit area is calculated, thereby realizing the field detection of the air leakage quantity of the protection device, solving the problem that the detection can only be realized in a test room or a protection device production workshop, improving the detection efficiency and ensuring the reliability and the safety of the civil defense engineering protection device.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A civil air defense engineering protection equipment air leakage field detection method is characterized by comprising the following steps:
s1, measuring the length and the area of an opening seam of the protective equipment;
s2, covering the whole protection equipment with a sealing film, sealing along the outer frame, and installing a sealing plate on the inner side of the protection equipment;
s3, applying positive and negative pressure to a static pressure box formed between the sealing film and the sealing plate, and measuring the additional air permeation amount;
s4, after the sealing film is removed, applying positive pressure and negative pressure to a static pressure box formed between the protective equipment and the sealing plate, and measuring the total air permeation amount;
and S5, calculating the sum of the unit seam length and the air leakage amount per unit area according to the additional air permeability and the total air permeability.
2. The field detection method for the air leakage of the civil air defense engineering protection equipment as claimed in claim 1, wherein the application of the positive and negative pressure between the sealing membrane and the sealing plate is specifically as follows:
the method comprises the following steps of firstly carrying out preliminary pressurization, and respectively applying three pressure difference pulses before positive and negative pressure detection, wherein the absolute value of the pressure difference is 150Pa, the pressurization speed is 50Pa/s, the pressure difference stabilization action time is not less than 3s, and the pressure release time is not less than 1 s;
pressurizing step by step, wherein the acting time of each step of pressure is 10s, and positive pressure step by step is firstly performed, and then negative pressure step by step is performed.
3. The field detection method for the air leakage of the civil air defense engineering protection equipment as claimed in claim 1, wherein the application of the positive and negative pressure between the protection equipment and the sealing plate is specifically as follows:
the method comprises the following steps of firstly carrying out preliminary pressurization, and respectively applying three pressure difference pulses before positive and negative pressure detection, wherein the absolute value of the pressure difference is 150Pa, the pressurization speed is 50Pa/s, the pressure difference stabilization action time is not less than 3s, and the pressure release time is not less than 1 s;
pressurizing step by step, wherein the acting time of each step of pressure is 10s, and positive pressure step by step is firstly performed, and then negative pressure step by step is performed.
4. The method for detecting the air leakage of the civil air defense engineering protection equipment on site as claimed in claim 1, wherein the air permeation quantity is measured by a flow measuring device on a pipeline.
5. The method for detecting the air leakage of the civil air defense engineering protection equipment on site as claimed in claim 1, wherein the additional air permeation quantity is the air permeation quantity passing through the sealing film and the sealing plate and the connecting seam part between the sealing film and the sealing plate except the air permeation quantity passing through the protection equipment.
6. The field detection method for air leakage of the civil air defense engineering protection equipment as claimed in claim 1, characterized in that the assessment of the air leakage detection result is that the sum of the air leakage per unit length of the seam and per unit area is not greater than the maximum allowable air leakage.
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| CN201910931536.8A CN111678657A (en) | 2019-09-29 | 2019-09-29 | Air leakage field detection method for civil air defense engineering protection equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112444473A (en) * | 2020-11-26 | 2021-03-05 | 上海众材工程检测有限公司 | Method for detecting air permeation quantity of curtain wall opening fan |
| CN113358295A (en) * | 2021-05-31 | 2021-09-07 | 云度新能源汽车有限公司 | Method and device for measuring air leakage quantity of vehicle door |
| CN117516805A (en) * | 2024-01-03 | 2024-02-06 | 建研院检测中心有限公司 | Calibration method for air permeability measuring system of building exterior door and window |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113358295A (en) * | 2021-05-31 | 2021-09-07 | 云度新能源汽车有限公司 | Method and device for measuring air leakage quantity of vehicle door |
| CN117516805A (en) * | 2024-01-03 | 2024-02-06 | 建研院检测中心有限公司 | Calibration method for air permeability measuring system of building exterior door and window |
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Address after: No. 939, Tianchen Road, Ji'nan high tech Zone, Shandong, Shandong Applicant after: Shandong special equipment inspection and Research Institute Group Co.,Ltd. Address before: No. 939, Tianchen Road, Ji'nan high tech Zone, Shandong, Shandong Applicant before: SHANDONG SPECIAL EQUIPMENT INSPECTION INSTITUTE CO.,LTD. |
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Application publication date: 20200918 |
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