CN114408208B - Access type pressure detection and control equipment and method - Google Patents
Access type pressure detection and control equipment and method Download PDFInfo
- Publication number
- CN114408208B CN114408208B CN202111600069.4A CN202111600069A CN114408208B CN 114408208 B CN114408208 B CN 114408208B CN 202111600069 A CN202111600069 A CN 202111600069A CN 114408208 B CN114408208 B CN 114408208B
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 238000004378 air conditioning Methods 0.000 claims description 35
- 238000009825 accumulation Methods 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010572 single replacement reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Transportation (AREA)
- Aviation & Aerospace Engineering (AREA)
- Examining Or Testing Airtightness (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides an access type pressure detection and control device and method, which solve the problems that the integrity of a cold air system is required to be destroyed and the air release force is difficult to control when the pressure of the system is released in the existing cold air system test. The device comprises a shell, a first air hand valve, a second air hand valve, a first pressure gauge and a second pressure gauge, wherein the first air hand valve and the second air hand valve are arranged on the shell; the shell is also provided with an air inlet, an air outlet and an air outlet; the gas enters the first gas hand valve through the gas inlet and is discharged from the gas outlet, namely the main pipeline is the gas inlet, the gas hand valve and the gas outlet; a first pressure gauge is connected between the air inlet and the first air hand valve; a second pressure gauge and a second air hand valve are connected between the first air hand valve and the air outlet; the other port of the second air hand valve is communicated with the air outlet.
Description
Technical Field
The invention belongs to the technical field of cold air system tests, and particularly relates to access type pressure detection and control equipment and method, which can be used for detecting and regulating the pressure in a system during an aircraft cold air system test.
Background
In aircraft repair, air tightness and functional detection tests are usually required to be carried out on the air conditioning system to ensure the working reliability of the air conditioning system, and the tests require that the pressure of the system is within a certain range, so that the pressure of the system needs to be detected and controlled. The aircraft cold air system is now inflated using only the ground inflation equipment to provide pressure and the pressure within the system is reflected by a pressure gauge on the ground inflation equipment. The air conditioning system of the aircraft generally comprises an accumulator (namely a cold air bottle), a one-way valve, an actuating cylinder and the like, and can be simplified into an accumulator end and a working end, wherein the accumulator end and the working end are connected through a straight-through joint, and the one-way valve is arranged between the ground inflating equipment and the accumulator of the air conditioning system of the aircraft so as to ensure that the air in the air conditioning system cannot reversely flow.
In general, the air conditioning system test directly uses the on-board air conditioning system pipeline, however, the pressure required by the process of each test stage of the air conditioning system is not consistent, the pressure supply control method cannot directly solve the problem that the on-board pressure is greater than the test requirement, and at this time, the air conditioning system pressure is reduced by breaking the integrity of the air conditioning system and cutting off the air release of a connecting joint at a certain position on the machine. However, the air release method cannot accurately control the air release amount, and if the joint is less in loosening amount, the air release amount is less, and the air release time is long; if the unscrewing amount is too large, high-pressure gas can directly rush out of the joint, so that the joint is damaged and scrapped, and even other products are damaged and personnel are injured due to the fact that the catheter flies in disorder. Meanwhile, when the fault is removed and parts at the working end are replaced, the pressure of the whole cold air system is required to be completely discharged, so that the time for discharging and inflating is too long, and the maintenance efficiency is too low.
In view of this, there is a need for a device and method for releasing the pressure of a cooling system that is safer, more convenient and more efficient.
Disclosure of Invention
The invention aims to solve the technical problems that the integrity of the existing air conditioning system is required to be destroyed, the air release force is difficult to control and the efficiency of replacing fault parts is low when the existing air conditioning system is tested and fault is removed, and provides access type pressure detection and control equipment and method.
In order to achieve the above purpose, the technical solution provided by the present invention is:
an access type pressure detection and control device is characterized in that: the device comprises a shell, a first air hand valve, a second air hand valve, a first pressure gauge and a second pressure gauge, wherein the first air hand valve and the second air hand valve are arranged on the shell;
the shell is also provided with an air inlet, an air outlet and an air outlet;
the gas enters the first gas hand valve through the gas inlet and is discharged from the gas outlet, namely the main pipeline is the gas inlet, the gas hand valve and the gas outlet;
a first pressure gauge is connected between the air inlet and the first air hand valve;
a second pressure gauge and a second air hand valve are connected between the first air hand valve and the air outlet;
the other port of the second air hand valve is communicated with the air outlet.
All the parts are connected through a conduit; the air hand valve is equivalent to a switch, and the opening of the air hand valve can be controlled to control the exhaust amount, namely the air hand valve can be adjusted to control the exhaust amount and the speed.
Further, one of the cover plates of the housing is slidably openable for ease of maintenance and test readings.
Further, in order to facilitate installation and control and make the structural layout of the whole equipment more reasonable, the first air hand valve and the second air hand valve are arranged on two opposite side plates of the shell;
the air inlet and the air outlet are both arranged on the bottom plate of the shell.
Further, in use, the air inlet communicates with a pressure accumulating end of the aircraft cold air system;
the air outlet is communicated with the working end of the air cooling system of the airplane;
the exhaust port is communicated with the atmosphere.
The invention also provides a method for performing an air tightness test on the air conditioning system of the airplane by adopting the access type pressure detection and control equipment, which is characterized by comprising the following steps of:
1) The method comprises the steps of connecting the connected pressure detection and control equipment between a pressure accumulation end and a working end of an airplane cold air system, wherein an air inlet is communicated with the pressure accumulation end, an air outlet is communicated with the working end, and an air outlet is communicated with the atmospheric environment;
2) Opening a first air hand valve, closing a second air hand valve, filling compressed air with certain pressure into an airplane cold air system through ground air filling equipment, and closing the first air hand valve when the first pressure gauge and the second pressure represent the same number;
3) Observing the change of the first pressure gauge and the second pressure representation number, and judging whether the air cooling system of the aircraft leaks or not;
if the number of the first pressure gauge is reduced, searching for a leakage part, opening the first air hand valve and the second air hand valve for pressure relief, removing leakage faults, and repeating the test of the step 2);
if the number of the second pressure gauge is reduced, searching for an air leakage part, opening a second air hand valve to release the working end pressure, and repeating the step 2) for testing after the fault is removed.
The method for measuring the pressure of the air conditioning system of the airplane by adopting the access type pressure detection and control equipment is characterized by comprising the following steps of:
the method comprises the steps of connecting the connected pressure detection and control equipment between a pressure accumulation end and a working end of an airplane cold air system, wherein an air inlet is communicated with the pressure accumulation end, an air outlet is communicated with the working end, and an air outlet is communicated with the atmospheric environment;
the method comprises the following measurement states:
A. the first air hand valve is opened, the second air hand valve is closed, the pressure accumulation end is communicated with the working end, the first pressure gauge and the second pressure gauge measure the pressure of the whole cold air system, and the readings are the same;
B. opening a first air hand valve, adjusting a second air hand valve, enabling the pressure of the air conditioning system to be communicated with the exhaust port through the second air hand valve to release the pressure, enabling the pressure of the air conditioning system to be reduced, and enabling the first pressure gauge and the second pressure gauge to measure the pressure of the whole air conditioning system, wherein the indication is the same;
C. and closing a first air hand valve and a second air hand valve, wherein the first air hand valve divides the system into a pressure accumulation end and a working end, the first pressure gauge measures the pressure of the pressure accumulation end, and the second pressure gauge measures the pressure of the working end.
D. Closing the first air hand valve, adjusting the second air hand valve, keeping the pressure of the pressure accumulation end unchanged, releasing the pressure of the working end through the second air hand valve, reducing the pressure, measuring the pressure of the pressure accumulation end by the first pressure gauge, and measuring the pressure of the working end by the second pressure gauge.
The invention has the beneficial effects that:
1. the access type pressure detection and control equipment can separate the pressure of the air inlet end from the pressure of the air outlet end through the first air hand valve, and the first pressure gauge and the second pressure gauge can respectively detect the pressure of the air inlet end and the pressure of the air outlet end, so that the pressure of each part in the system is detected. Opening the second pneumatic hand valve to release system pressure; the first air hand valve is closed, and the second air hand valve is opened, so that the function of keeping the pressure of the air inlet end and releasing the pressure of the air outlet end can be realized.
2. The access type pressure detection and control device is matched with ground air charging equipment, the ground air charging equipment controls the pressure rise in the air conditioning system, the access type pressure detection and control device controls the pressure reduction of the air conditioning system, and the pressure required by various tests can be conveniently achieved by one charging and one discharging.
3. The access type pressure detection and control device adopts two pressure gauges and two air hand valves. The combination of the two air hand valves is used for controlling the pressure of each part, and the two pressure gauges reflect the actual pressure of each part along with the state of the air hand valves in real time.
4. The invention realizes the control and measurement of the pressure in the cold air system, the equipment is connected into the system before the test, the pressure of the cold air system is regulated and controlled by the pressure relief function of the equipment without unscrewing the joint, and the problems of inconvenient operation and unsafe caused by unscrewing the joint are solved; compared with the ground air charging equipment which reflects the pressure of the air conditioning system, the pressure of the air conditioning system measured by the access type pressure detection and control equipment is more real and accurate.
5. The access type pressure detection and control equipment adopts two gas-hand valve combination control and two pressure gauges to measure separately, so that the problems of measurement and control of the system pressure during the test of the cold air system are solved, the test pressure is ensured to meet the technical standard, and the effectiveness and reliability of the test of the cold air system are ensured. The device also improves the pressure relief mode in the cold air system test, so that the pressure relief process is more convenient and controllable, and the operation is simpler and safer.
6. The access type pressure detection and control equipment provided by the invention realizes accurate measurement and accurate control of the pressure in the air conditioning system through the pressure gauge and the air hand valve, and realizes pressure detection and control in the air conditioning system test.
Drawings
FIG. 1 is a schematic diagram of an access pressure detection and control device according to the present invention;
FIG. 2 is a schematic diagram of an access pressure detection and control device;
FIG. 3 is a schematic diagram of an access pressure detection and control device according to the present invention;
FIG. 4 is a schematic diagram of the connection used by the access pressure detection and control device of the present invention;
the reference numerals are as follows:
the device comprises a cover plate 1, a shell 2, a first air hand valve 3, an air inlet 4, an air outlet 5, a second air hand valve 6, an air outlet 7, a first pressure gauge 8 and a second pressure gauge 9.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and specific examples:
an access type pressure detection and control device comprises a shell, a first air hand valve, a second air hand valve, a first pressure gauge, a second pressure gauge and various connectors for connection. The installation mode is shown in fig. 1 and 2, and the working principle is shown in fig. 3.
The casing is cuboid, and a apron on it can slide and open. All parts are connected by a conduit, a main pipeline is an air inlet 4, a first air hand valve 3 and an air outlet 5, a first pressure gauge 8 is connected between the air inlet 4 and the first air hand valve 3, a second pressure gauge 9 is connected between the first air hand valve 3 and the air outlet 5, and the other end of the second air hand valve 6 is connected with a conduit to be directly connected with the atmosphere. The first air hand valve and the second air hand valve are arranged on two opposite side plates of the shell; the air inlet and the air outlet are both arranged on the bottom plate of the shell.
Because the air conditioning system of the airplane generally consists of an accumulator, a check valve, an actuator cylinder and the like, the air conditioning system of the airplane can be simplified into an accumulator end and a working end. When the device is used, the device is connected between the pressure accumulation end and the working end, the guide pipes connected with the two ends of the straight-through joint are disconnected, the guide pipes from the pressure accumulation end are connected with the air inlet of the device, the guide pipes leading to the working end are connected with the air outlet of the device, and the air path of the original air conditioning system is not changed, as shown in fig. 4.
Referring to fig. 4, the present apparatus is connected to a cold air system, and the following operation conditions are provided:
(1) the first air hand valve c is opened, the second air hand valve d is closed, the pressure accumulation end is communicated with the working end, the first pressure gauge a and the second pressure gauge b measure the pressure of the whole system, and the readings are the same.
(2) And opening the first air hand valve c, adjusting the second air hand valve d, releasing pressure by a conduit of which the system pressure is communicated with the atmosphere through the second air hand valve d, reducing the system pressure, and measuring the whole system pressure by the first pressure gauge a and the second pressure gauge b, wherein the readings are the same.
(3) And closing a first air hand valve c and a second air hand valve d, wherein the first air hand valve divides the system into a pressure accumulation end and a working end, the first pressure gauge a measures the pressure of the pressure accumulation end, and the second pressure gauge b measures the pressure of the working end.
(4) Closing the first air hand valve c, adjusting the second air hand valve d, keeping the pressure of the pressure accumulation end unchanged, releasing the pressure of the working end through the second air hand valve d, reducing the pressure, measuring the pressure accumulation end by the first pressure gauge a, and measuring the pressure of the working end by the second pressure gauge b.
When the air tightness test of the air conditioning system is carried out, the first air hand valve c is firstly opened, the second air hand valve d is closed, compressed air with certain pressure is injected into the system through ground air charging equipment, when the pressure in the system is stable and the numbers of the first pressure gauge a and the second pressure gauge b are the same, the first air hand valve c is closed, and whether air leakage exists in each part is judged by observing the numbers of the first pressure gauge a and the second pressure gauge b. If the pressure of the pressure accumulation end is reduced, searching for a gas leakage part, opening the first pneumatic valve c and the second pneumatic valve d to release pressure, removing the gas leakage fault, and repeating the steps to perform a test; if the working end pressure is reduced, searching for an air leakage position, opening a second air hand valve d to release the working end pressure, and repeating the steps to test after the working end pressure is released and faults are removed.
The system is divided into the pressure accumulating end and the working end by using the access type pressure detecting and controlling equipment, and has the advantages that the pressure accumulating end parts are few, the air leakage part is easy to find and remove, the working end relates to a plurality of pipes, joints and accessories of the whole cold air system, but the whole cold air system pressure is not required to be removed, the problem parts can be replaced by only opening the second air hand valve to release the air in the pipes and accessories of the working end, the whole process of air release, replacement and inflation is simple and convenient to operate, the air displacement is small, the test requirement can be met by only supplementing the air released by the working end to the cold air system during the retest, and the single replacement time is shortened to 5 minutes from half an hour for the same part by adopting the equipment, so that the maintenance efficiency is greatly improved, and the time cost and the economic cost are saved.
In addition to the tightness test, other functional tests requiring system pressure can also be measured and controlled using the present apparatus.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made without departing from the spirit and scope of the invention.
Claims (8)
1. The method for carrying out the air tightness test on the air conditioning system of the airplane by adopting the access type pressure detection and control equipment is characterized by comprising the following steps of:
the access type pressure detection and control equipment comprises a shell, a first air hand valve, a second air hand valve, a first pressure gauge and a second pressure gauge, wherein the first air hand valve and the second air hand valve are arranged on the shell;
the shell is also provided with an air inlet, an air outlet and an air outlet;
the gas enters the first gas hand valve through the gas inlet and is discharged from the gas outlet;
a first pressure gauge is connected between the air inlet and the first air hand valve;
a second pressure gauge and a second air hand valve are connected between the first air hand valve and the air outlet;
the other port of the second air hand valve is communicated with the air outlet;
the method for carrying out the air tightness test on the air conditioning system of the airplane comprises the following steps:
1) The method comprises the steps of connecting the connected pressure detection and control equipment between a pressure accumulation end and a working end of an airplane cold air system, wherein an air inlet is communicated with the pressure accumulation end, an air outlet is communicated with the working end, and an air outlet is communicated with the atmospheric environment;
2) Opening a first air hand valve, closing a second air hand valve, filling compressed air with certain pressure into an airplane cold air system through ground air filling equipment, and closing the first air hand valve when the first pressure gauge and the second pressure represent the same number;
3) Observing the change of the first pressure gauge and the second pressure representation number, and judging whether the air cooling system of the aircraft leaks or not;
if the number of the first pressure gauge is reduced, searching for a leakage part, opening the first air hand valve and the second air hand valve for pressure relief, removing leakage faults, and repeating the test of the step 2);
if the number of the second pressure gauge is reduced, searching for an air leakage part, opening a second air hand valve to release the working end pressure, and repeating the step 2) for testing after the fault is removed.
2. The method according to claim 1, wherein:
one of the cover plates of the housing is slidably openable.
3. The method according to claim 1 or 2, characterized in that:
the first air hand valve and the second air hand valve are arranged on two opposite side plates of the shell;
the air inlet and the air outlet are both arranged on the bottom plate of the shell.
4. A method according to claim 3, characterized in that:
the air inlet is communicated with the pressure accumulation end of the air conditioning system of the airplane;
the air outlet is communicated with the working end of the air cooling system of the airplane;
the exhaust port is communicated with the atmosphere.
5. The method for measuring the pressure of the air conditioning system of the aircraft by adopting the access type pressure detection and control equipment is characterized by comprising the following steps of:
the access type pressure detection and control equipment comprises a shell, a first air hand valve, a second air hand valve, a first pressure gauge and a second pressure gauge, wherein the first air hand valve and the second air hand valve are arranged on the shell;
the shell is also provided with an air inlet, an air outlet and an air outlet;
the gas enters the first gas hand valve through the gas inlet and is discharged from the gas outlet;
a first pressure gauge is connected between the air inlet and the first air hand valve;
a second pressure gauge and a second air hand valve are connected between the first air hand valve and the air outlet;
the other port of the second air hand valve is communicated with the air outlet;
the method comprises the steps of connecting the connected pressure detection and control equipment between a pressure accumulation end and a working end of an airplane cold air system, wherein an air inlet is communicated with the pressure accumulation end, an air outlet is communicated with the working end, and an air outlet is communicated with the atmospheric environment;
the method comprises the following measurement states:
A. the first air hand valve is opened, the second air hand valve is closed, the pressure accumulation end is communicated with the working end, the first pressure gauge and the second pressure gauge measure the pressure of the whole cold air system, and the readings are the same;
B. opening a first air hand valve, adjusting a second air hand valve, enabling the pressure of the air conditioning system to be communicated with the exhaust port through the second air hand valve to release the pressure, enabling the pressure of the air conditioning system to be reduced, and enabling the first pressure gauge and the second pressure gauge to measure the pressure of the whole air conditioning system, wherein the indication is the same;
C. closing a first air hand valve and a second air hand valve, wherein the first air hand valve divides the system into a pressure accumulation end and a working end, the first pressure gauge measures the pressure of the pressure accumulation end, and the second pressure gauge measures the pressure of the working end;
D. closing the first air hand valve, adjusting the second air hand valve, keeping the pressure of the pressure accumulation end unchanged, releasing the pressure of the working end through the second air hand valve, reducing the pressure, measuring the pressure of the pressure accumulation end by the first pressure gauge, and measuring the pressure of the working end by the second pressure gauge.
6. The method according to claim 5, wherein:
one of the cover plates of the housing is slidably openable.
7. The method according to claim 5 or 6, characterized in that:
the first air hand valve and the second air hand valve are arranged on two opposite side plates of the shell;
the air inlet and the air outlet are both arranged on the bottom plate of the shell.
8. The method according to claim 7, wherein:
the air inlet is communicated with the pressure accumulation end of the air conditioning system of the airplane;
the air outlet is communicated with the working end of the air cooling system of the airplane;
the exhaust port is communicated with the atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111600069.4A CN114408208B (en) | 2021-12-24 | 2021-12-24 | Access type pressure detection and control equipment and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111600069.4A CN114408208B (en) | 2021-12-24 | 2021-12-24 | Access type pressure detection and control equipment and method |
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| Publication Number | Publication Date |
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| CN114408208A CN114408208A (en) | 2022-04-29 |
| CN114408208B true CN114408208B (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111600069.4A Active CN114408208B (en) | 2021-12-24 | 2021-12-24 | Access type pressure detection and control equipment and method |
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| CN (1) | CN114408208B (en) |
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| CN113758658A (en) * | 2021-10-11 | 2021-12-07 | 中国商用飞机有限责任公司 | Airplane pipeline airtightness test device and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140041388A1 (en) * | 2012-08-08 | 2014-02-13 | Tronair, Inc. | Aircraft Fuel System Test Unit |
| FR3111334A1 (en) * | 2020-06-16 | 2021-12-17 | Airbus Operations (S.A.S.) | System and Method for depressurizing an aircraft cabin on the ground from outside the aircraft |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU789693A1 (en) * | 1978-12-25 | 1980-12-23 | Предприятие П/Я В-2775 | Method of tightness testing of hollow articles |
| US6318155B1 (en) * | 1997-07-25 | 2001-11-20 | Bruce Carr | Pressure testing apparatus |
| CN203772508U (en) * | 2014-03-04 | 2014-08-13 | 上海诺地乐通用设备制造有限公司 | Large-scale ventilating device air leakage rate detector |
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| CN108627308A (en) * | 2018-06-29 | 2018-10-09 | 杭州固恒能源科技有限公司 | From high-pressure air source to the inflation method of workpiece, air charging system and differential pressure air-leakage detector |
| CN210071266U (en) * | 2019-07-02 | 2020-02-14 | 芜湖航翼集成设备有限公司 | Two-stage combined decompression aircraft fuel tank air tightness inspection device |
| CN113390581A (en) * | 2021-05-17 | 2021-09-14 | 浙江蓝箭航天空间科技有限公司 | Liquid carrier rocket diaphragm capsule is aerifyd and testing arrangement |
| CN113758658A (en) * | 2021-10-11 | 2021-12-07 | 中国商用飞机有限责任公司 | Airplane pipeline airtightness test device and method |
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| Publication number | Publication date |
|---|---|
| CN114408208A (en) | 2022-04-29 |
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