CN114967776A - Air pressure balancing device for heat exchange pipeline in airplane climate laboratory - Google Patents
Air pressure balancing device for heat exchange pipeline in airplane climate laboratory Download PDFInfo
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- CN114967776A CN114967776A CN202210812723.6A CN202210812723A CN114967776A CN 114967776 A CN114967776 A CN 114967776A CN 202210812723 A CN202210812723 A CN 202210812723A CN 114967776 A CN114967776 A CN 114967776A
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- pipeline
- pressure
- valve
- pneumatic switch
- switch valve
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
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- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/50—On board measures aiming to increase energy efficiency
Abstract
The invention discloses an air pressure balancing device for a heat exchange pipeline in an aircraft climate laboratory, which comprises an expansion tank, a heat exchange main pipeline, a pressure balance control air passage and a fault emergency air passage, wherein the pressure balance control air passage comprises a first hand valve, a first pneumatic switch valve, a first pipeline flexible connection, a constant pressure pump, a second pipeline flexible connection, a one-way valve, a second pneumatic switch valve, a second hand valve, a main pipeline monitoring point pressure monitor, a third pneumatic switch valve and a fourth pneumatic switch valve; the fault emergency gas circuit comprises a third hand valve and a pipeline safety valve. The easily vaporized secondary refrigerant circularly flows between the pipeline and the expansion tank, the pressure of the pipeline is controlled within a target pressure range, the control precision is high, and the safety of the secondary refrigerant pipeline is improved by arranging the fault emergency gas circuit.
Description
Technical Field
The invention belongs to the technical field of pipeline pressure balance control, and particularly relates to an air pressure balancing device for a heat exchange pipeline in an aircraft climate laboratory.
Background
For wide temperature range aircraft climate laboratories, coolant heat exchangers are typically employed to exchange heat with air. The secondary refrigerant is generally transmitted for a long distance through a closed pipeline, a pump is arranged in the closed pipeline, and a pressure stabilizing tank is arranged in a pipeline system so as to ensure that the pump normally operates and convey the secondary refrigerant to a heat exchanger position, so that the pressure before the pump is kept within a certain range. The common method for using the pressure stabilizing tank of the pipeline system is to inject high-pressure nitrogen into the pressure stabilizing tank, so that the pressure of the closed pipeline system meets the use requirement, and if the pressure of the pipeline system is reduced along with the increase of the operation time, the high-pressure nitrogen needs to be supplemented again. For a wide temperature range airplane climate laboratory, as the secondary refrigerant needs to be adjusted in a wide temperature range according to experimental requirements, the general secondary refrigerant is easy to generate phase change vaporization when the temperature is high, so that the pressure of a closed pipeline is increased, and in order to avoid that the pressure of the closed pipeline is too high and exceeds the upper limit of the pressure, the nitrogen in a pressure stabilizing tank needs to be discharged; in addition, after the low-temperature test of the climate laboratory is finished, the temperature of the secondary refrigerant in the main pipeline is in a low-temperature area, and along with the gradual return rise of the temperature of the secondary refrigerant in the pipeline, the pressure of the secondary refrigerant in the pipeline can also be gradually increased, and even can exceed the designed pressure value of the pipeline. Therefore, the common method of the pipeline system surge tank needs to frequently supplement or discharge nitrogen when the pressure of the closed secondary refrigerant pipeline which is easy to change the phase is balanced, and the control precision is poor.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an air pressure balancing device for a heat exchange pipeline in an aircraft climate laboratory, which is novel and reasonable in design, a fault emergency air path is arranged to discharge secondary refrigerant in a closed pipeline into an expansion tank, so that the safety of the secondary refrigerant pipeline is improved, nitrogen supplement and discharge through a pressure stabilizing tank are not needed, a nitrogen generating device and the configuration of a nitrogen pipeline are saved, the secondary refrigerant which is easy to change phase circularly flows between the pipeline and the expansion tank, the pipeline pressure is controlled within a target pressure range, and the air pressure balancing device is convenient to popularize and use.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides an aircraft climate laboratory heat transfer pipeline atmospheric pressure balancing unit which characterized in that: the pressure balance control gas circuit comprises a main pipe, a first hand valve, a first pneumatic switch valve, a first pipeline flexible connection, a constant pressure pump, a second pipeline flexible connection, a one-way valve, a second pneumatic switch valve, a second hand valve and a main pipe monitoring point pressure monitor, wherein the first hand valve, the first pneumatic switch valve, the first pipeline flexible connection, the constant pressure pump, the second pipeline flexible connection, the one-way valve, the second pneumatic switch valve, the second hand valve and the main pipe monitoring point pressure monitor are sequentially installed on the main pipe;
the fault emergency gas circuit comprises a fault emergency pipe, a third hand valve and a pipeline safety valve, wherein the third hand valve and the pipeline safety valve are both installed on the fault emergency pipe.
Foretell aircraft climate laboratory heat transfer pipeline atmospheric pressure balancing unit, its characterized in that: and a tank body safety valve, a mechanical liquid level meter, a high-level liquid level alarm and a low-level liquid level alarm are arranged on the expansion tank.
Foretell aircraft climate laboratory heat transfer pipeline atmospheric pressure balancing unit, its characterized in that: still including retrieving the jar, retrieve jar and jar output intercommunication of body relief valve.
The invention has the advantages that the secondary refrigerant in the closed pipeline is discharged into the expansion tank through the fault emergency gas circuit, the safety of the secondary refrigerant pipeline is improved, nitrogen supplement and discharge through the pressure stabilizing tank are not needed, the configuration of the nitrogen generating device and the nitrogen pipeline is saved, the secondary refrigerant which is easy to change phase circularly flows between the pipeline and the expansion tank, the pipeline pressure is controlled within a target pressure range, the secondary refrigerant which is easy to change phase circularly flows between the pipeline and the expansion tank, the pipeline pressure is controlled within the target pressure range, the safe operation of the secondary refrigerant pump is ensured, the secondary refrigerant is conveyed to the position of the heat exchanger, meanwhile, the risk that the pressure of the secondary refrigerant pipeline is too high and exceeds the upper pressure limit is reduced, and the popularization and the use are convenient.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic view of the structural connection of the present invention.
Description of reference numerals:
1-an expansion tank; 2-mechanical level gauge; 3-tank safety valve; 4-high level liquid level alarm;
5-low level liquid level alarm; 6-first hand valve; 7-second hand valve; 8-a first pneumatic switching valve;
9-a second pneumatic switch valve; 10-a third pneumatic switching valve; 11-a fourth pneumatic switching valve; 12-a constant pressure pump;
13-flexible connection of the first pipeline; 14-flexible connection of a second pipeline; 15-a one-way valve; 16-third hand valve;
17-pipeline safety valve; 18-main heat exchange pipes; 19-a main pipeline monitoring point pressure monitor; and 20, a recovery tank.
Detailed Description
As shown in fig. 1, the air pressure balancing device for the heat exchange pipeline in the aircraft climate laboratory comprises an expansion tank 1, a main heat exchange pipeline 18, and a pressure balance control air passage and a failure emergency air passage which are arranged between the expansion tank 1 and the main heat exchange pipeline 18, wherein the pressure balance control air passage comprises a main pipeline, and a first hand valve 6, a first pneumatic switch valve 8, a first pipeline flexible connection 13, a constant pressure pump 12, a second pipeline flexible connection 14, a one-way valve 15, a second pneumatic switch valve 9, a second hand valve 7 and a main pipeline monitoring point pressure monitor 19 which are sequentially arranged on the main pipeline, the input end of the first pneumatic switch valve 8 and the input end of the second pneumatic switch valve 9 are connected through a first pressure relief pipe, a third pneumatic switch valve 10 is arranged on the first pressure relief pipe, the output end of the first pneumatic switch valve 8 and the output end of the second pneumatic switch valve 9 are connected through a second pressure relief pipe, a fourth pneumatic switch valve 11 is arranged on the second pressure relief pipe;
the fault emergency gas circuit comprises a fault emergency pipe, and a third hand valve 16 and a pipeline safety valve 17 which are both installed on the fault emergency pipe.
It should be noted that, by discharging the easily vaporized coolant in the main heat exchange pipeline 18 into the expansion tank 1 or conveying the easily vaporized coolant to the main heat exchange pipeline 18 from the expansion tank 1, the pressure of the control pipeline system is within the target pressure range, the control precision is high, a failure emergency gas circuit with a safety valve is designed between the main heat exchange pipeline 18 and the expansion tank 1, when the constant pressure control valve and the constant pressure pump 12 are failed, the coolant in the closed pipeline is discharged into the expansion tank 1, the safety of the coolant pipeline is improved, the pipeline pressure is controlled without the nitrogen supplementing and discharging mode through the pressure stabilizing tank, and the configuration of a nitrogen generating device and a nitrogen pipeline is saved.
In this embodiment, the expansion tank 1 is provided with a tank safety valve 3, a mechanical level meter 2, a high level liquid level alarm 4 and a low level liquid level alarm 5.
In the embodiment, the device further comprises a recovery tank 20, and the recovery tank 20 is communicated with the output end of the tank safety valve 3.
When the air pressure balancing device of the heat exchange pipeline in the airplane climate laboratory is actually used, the air pressure balancing device comprises the following steps:
step one, setting a middle control level of a pressure value of a heat exchange main pipeline: setting four intermediate control levels of the pressure value of the main heat exchange pipe, wherein the four intermediate control levels of the pressure value of the main heat exchange pipe comprise a primary pressure control threshold P1 of the main heat exchange pipe, a secondary pressure control threshold P2 of the main heat exchange pipe, a tertiary pressure control threshold P3 of the main heat exchange pipe and a quaternary pressure control threshold P4 of the main heat exchange pipe, P1 is more than P2 and more than P3 and more than P4, the primary pressure control threshold P1 of the main heat exchange pipe is more than a lower limit value Pmin of a target use pressure range of the pipe, and the quaternary pressure control threshold P4 of the main heat exchange pipe is less than an upper limit value Pmax of the target use pressure range of the pipe;
step two, monitoring the pressure value at the position of the monitoring point on the main pipe: monitoring the pressure value P at the monitoring point position on the main pipe in real time by using a main pipe monitoring point pressure monitor 19;
step three, pressure balance control of the closed pipeline of the easily vaporized secondary refrigerant:
when the pressure value P acquired by the main pipeline monitoring point pressure monitor 19 in real time is smaller than Pmin, a first pneumatic switch valve 8 and a second pneumatic switch valve 9 on a main pipeline are opened, a third pneumatic switch valve 10 on a first pressure relief pipe and a fourth pneumatic switch valve 11 on a second pressure relief pipe are closed, a constant pressure pump 12 is started, and the easily vaporized secondary refrigerant is pumped out of the expansion tank 1 and conveyed to a heat exchange main pipeline 18 for forced pressurization;
when Pmin < P < P1, a first pneumatic switch valve 8 and a second pneumatic switch valve 9 on a main pipe are opened, a third pneumatic switch valve 10 on a first pressure relief pipe and a fourth pneumatic switch valve 11 on a second pressure relief pipe are closed, a constant pressure pump 12 is started, the easily vaporized secondary refrigerant is pumped out of an expansion tank 1 and conveyed to a heat exchange main pipe 18, when a pressure value P acquired by a main pipe monitoring point pressure monitor 19 in real time rises to P2, the first pneumatic switch valve 8 and the second pneumatic switch valve 9 on the main pipe are closed, the constant pressure pump 12 is closed, and the pressurization of the heat exchange main pipe 18 is completed;
when the pressure value P acquired by the main pipeline monitoring point pressure monitor 19 in real time is greater than Pmax, the third pneumatic switch valve 10 on the first pressure relief pipe and the fourth pneumatic switch valve 11 on the second pressure relief pipe are opened, the first pneumatic switch valve 8 and the second pneumatic switch valve 9 on the main pipeline are closed, the constant pressure pump 12 is started, and the easily vaporized secondary refrigerant in the heat exchange main pipeline 18 is discharged into the expansion tank 1 for forced pressure relief; if the first pneumatic switch valve 8, the second pneumatic switch valve 9, the third pneumatic switch valve 10, the fourth pneumatic switch valve 11 or the constant pressure pump 12 have faults, the pressure of the heat exchange main pipeline 18 reaches the upper limit of a pipeline safety valve 17, the pipeline safety valve 17 is opened, and the secondary refrigerant in the heat exchange main pipeline 18 is discharged into the expansion tank 1;
when P4 is less than P < Pmax, a third pneumatic switch valve 10 on the first pressure relief pipe and a fourth pneumatic switch valve 11 on the second pressure relief pipe are opened, a first pneumatic switch valve 8 and a second pneumatic switch valve 9 on the main pipe are closed, a constant pressure pump 12 is started, the easily vaporized secondary refrigerant in the heat exchange main pipe 18 is discharged into the expansion tank 1, when a pressure value P acquired by a main pipe monitoring point pressure monitor 19 in real time is reduced to P3, the third pneumatic switch valve 10 on the first pressure relief pipe and the fourth pneumatic switch valve 11 on the second pressure relief pipe are closed, the constant pressure pump 12 is closed, and pressure relief of the heat exchange main pipe 18 is completed;
the pressure value P acquired by the main pipeline monitoring point pressure monitor 19 in real time is controlled within the range of P2< P < P3.
In this embodiment, install a jar body relief valve 3, mechanical type level gauge 2, high-order liquid level alarm 4 and low level liquid level alarm 5 on the expansion tank 1, when high-order liquid level alarm 4 reported to the police, jar body relief valve 3 was opened and is carried out 1 emergency pressure release of expansion tank.
In this embodiment, the first hand valve 6 and the second hand valve 7 on the main pipe and the third hand valve 16 on the failure emergency pipe are kept in the normally open state, and are switched to the closed state when the heat exchange pipeline air pressure balancing device needs to be maintained.
When the device is used, the pressure of a control pipeline system is controlled within a target pressure range through setting four intermediate control levels of pressure values of a main heat exchange pipeline, the control precision is high, the pressure value P acquired by a main pipeline monitoring point pressure monitor 19 in real time is controlled within the range that P2 is less than P < P3 through pressure balance control of the closed pipeline of the easily vaporized coolant, the pressure of the closed heat exchange pipeline 18 of the coolant is adjusted in the wide temperature range using process of the easily vaporized coolant, the pressure of the closed pipeline system is kept within the target pressure range, the coolant pump is ensured to safely operate and convey the coolant to the position of a heat exchanger, and meanwhile, the risk that the pressure of the coolant pipeline is too high and exceeds the upper pressure limit is reduced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (3)
1. The utility model provides an aircraft climate laboratory heat transfer pipeline atmospheric pressure balancing unit which characterized in that: the pressure balance control gas circuit comprises an expansion tank (1), a heat exchange main pipeline (18), a pressure balance control gas circuit and a fault emergency gas circuit, wherein the pressure balance control gas circuit and the fault emergency gas circuit are arranged between the expansion tank (1) and the heat exchange main pipeline (18), the pressure balance control gas circuit comprises a main pipe, a first hand valve (6), a first pneumatic switch valve (8), a first pipeline flexible connection (13), a constant pressure pump (12), a second pipeline flexible connection (14), a one-way valve (15), a second pneumatic switch valve (9), a second hand valve (7) and a main pipeline monitoring point pressure monitor (19) which are sequentially installed on the main pipe, the input end of the first pneumatic switch valve (8) is connected with the input end of the second pneumatic switch valve (9) through a first pressure relief pipe, a third pneumatic switch valve (10) is installed on the first pressure relief pipe, the output end of the first pneumatic switch valve (8) is connected with the output end of the second pneumatic switch valve (9) through a second pressure relief pipe, a fourth pneumatic switch valve (11) is mounted on the second pressure relief pipe;
the fault emergency gas circuit comprises a fault emergency pipe, and a third hand valve (16) and a pipeline safety valve (17) which are both installed on the fault emergency pipe.
2. An aircraft climate laboratory heat exchange duct air pressure equalisation device according to claim 1, characterised in that: the expansion tank (1) is provided with a tank safety valve (3), a mechanical liquid level meter (2), a high-level liquid level alarm (4) and a low-level liquid level alarm (5).
3. An aircraft climate laboratory heat exchange duct air pressure equalisation device according to claim 2, characterised in that: the device also comprises a recovery tank (20), wherein the recovery tank (20) is communicated with the output end of the tank body safety valve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210812723.6A CN114967776B (en) | 2022-07-12 | 2022-07-12 | Air pressure balancing device for heat exchange pipeline in airplane climate laboratory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210812723.6A CN114967776B (en) | 2022-07-12 | 2022-07-12 | Air pressure balancing device for heat exchange pipeline in airplane climate laboratory |
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| CN114967776A true CN114967776A (en) | 2022-08-30 |
| CN114967776B CN114967776B (en) | 2022-10-28 |
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| CN202210812723.6A Active CN114967776B (en) | 2022-07-12 | 2022-07-12 | Air pressure balancing device for heat exchange pipeline in airplane climate laboratory |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916108A (en) * | 2010-08-31 | 2010-12-15 | 上海交通大学 | Automation device for use in civil aircraft environment control system function test |
| CN201916283U (en) * | 2010-12-31 | 2011-08-03 | 中国飞机强度研究所 | Pneumatic servo positive and negative pressure control device |
| US20180292431A1 (en) * | 2017-04-11 | 2018-10-11 | General Electric Company | Pitot-static air data test system with pilot and co-pilot verification |
| CN110006118A (en) * | 2019-03-29 | 2019-07-12 | 中国飞机强度研究所 | A kind of large-scale synthesis climatizer air treatment system |
| CN113961022A (en) * | 2021-12-21 | 2022-01-21 | 中国飞机强度研究所 | Pressure control system and pressure control method for aircraft test |
-
2022
- 2022-07-12 CN CN202210812723.6A patent/CN114967776B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916108A (en) * | 2010-08-31 | 2010-12-15 | 上海交通大学 | Automation device for use in civil aircraft environment control system function test |
| CN201916283U (en) * | 2010-12-31 | 2011-08-03 | 中国飞机强度研究所 | Pneumatic servo positive and negative pressure control device |
| US20180292431A1 (en) * | 2017-04-11 | 2018-10-11 | General Electric Company | Pitot-static air data test system with pilot and co-pilot verification |
| CN110006118A (en) * | 2019-03-29 | 2019-07-12 | 中国飞机强度研究所 | A kind of large-scale synthesis climatizer air treatment system |
| CN113961022A (en) * | 2021-12-21 | 2022-01-21 | 中国飞机强度研究所 | Pressure control system and pressure control method for aircraft test |
Non-Patent Citations (2)
| Title |
|---|
| 刘海燕 等: "大型气候实验室高低温模拟系统关键技术研究", 《装备环境工程》 * |
| 马建军 等: "大型综合气候实验室基础环境模拟系统设计", 《装备环境工程》 * |
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