CN110940468A - Intelligent airtight detection test bed - Google Patents

Intelligent airtight detection test bed Download PDF

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Publication number
CN110940468A
CN110940468A CN201910366513.7A CN201910366513A CN110940468A CN 110940468 A CN110940468 A CN 110940468A CN 201910366513 A CN201910366513 A CN 201910366513A CN 110940468 A CN110940468 A CN 110940468A
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CN
China
Prior art keywords
pressure sensor
test
pressure
intelligent
plc module
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Pending
Application number
CN201910366513.7A
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Chinese (zh)
Inventor
张文涛
石耀峰
吕俊杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanxi Yongyou Refrigeration Technology Co Ltd
Original Assignee
Shanxi Yongyou Refrigeration Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanxi Yongyou Refrigeration Technology Co Ltd filed Critical Shanxi Yongyou Refrigeration Technology Co Ltd
Priority to CN201910366513.7A priority Critical patent/CN110940468A/en
Publication of CN110940468A publication Critical patent/CN110940468A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating 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

Abstract

The invention discloses an intelligent air tightness detection test bed, and relates to the field of air tightness detection of refrigerating units. Test gas enters through the gas inlet pipe, the pressure and the temperature are respectively measured through the pressure sensor and the temperature sensor, the PLC module carries out real-time monitoring, recording and intelligent analysis on the test data, and controls the on-off of the electromagnetic valve, so that the precise control of the boosting pressure is realized, and the overpressure is effectively prevented; this test bench can step up in stages, and the automatic pressurize stage that gets into after accomplishing that steps up is at the pressurize in-process, and the pressure differential through PLC module analysis experiment when beginning and gaseous when finishing reachs the result of gas tightness experiment, and whole experiment process automation degree is high, and the experimental result is accurate reliable, and the practicality is extremely strong.

Description

Intelligent airtight detection test bed
Technical Field
The invention relates to the field of air tightness detection of refrigerating units, in particular to an intelligent air tightness detection test bed.
Background
In the production process of the refrigerating unit, in order to ensure the quality of the refrigerating unit and prevent gas leakage accidents, the refrigerating unit needs to perform an air tightness detection experiment aiming at the refrigerating unit before leaving a factory. At present, the air tightness experiment of the refrigerating unit still adopts a manual operation mode, a specially assigned person needs to be attended to regularly record during the air tightness experiment, time and labor are wasted, the efficiency is low, the operation is carried out only by the experience of workers, the boosting data cannot be mastered in time, the condition of overpressure is easy to occur, and the potential safety hazard is large; meanwhile, the result of the air tightness test is easily influenced by external factors such as temperature, time and the like, and the result lacks accuracy. Therefore, how to provide an intelligent air tightness test device which does not need to be attended by a specially-assigned person, has high automation degree and accurate and reliable experimental results is a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to provide an intelligent air tightness test bed which is simple in structure, high in automation degree and accurate and reliable in experimental result.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an intelligent airtight detection test bed which comprises an air inlet pipe, filters, test air pipes, a pressure sensor, a temperature sensor, a PLC module and a touch panel, wherein one end of the air inlet pipe is used for being connected with an experimental air source, the filters are arranged on the air inlet pipe, more than one test air pipe is connected in parallel with the other end of the air inlet pipe, an electromagnetic valve, the pressure sensor and the temperature sensor are sequentially arranged on each test air pipe along the air flow direction, and the exhaust end of each test air pipe is used for being connected with the interior of a refrigerating unit; the electromagnetic valve, the pressure sensor and the temperature sensor are all electrically connected with the PLC module, and the PLC module is in signal connection with the touch panel.
Optionally, the number of the test air pipes is three, and the three test air pipes are connected with the air inlet pipe through a collecting pipe.
Optionally, the pressure sensor includes a first pressure sensor and a second pressure sensor that are sequentially arranged along the airflow direction, and the first pressure sensor and the second pressure sensor are both electronic pressure sensors.
Optionally, a ball valve is further disposed between the electromagnetic valve of each test air pipe and the first pressure sensor, and the ball valve is electrically connected to the PLC module.
Optionally, each first pressure sensor on the test air pipe is respectively connected with a pressure gauge, and each second pressure sensor on the test air pipe is electrically connected with the PLC module.
Optionally, a right-angle valve is respectively arranged at the rear end of the temperature sensor on each test air pipe, and the right-angle valves are electrically connected with the PLC modules.
Optionally, the experimental gas source is a high-pressure nitrogen source.
Optionally, the system further comprises an automatic monitoring system and an automatic alarm system, wherein the automatic monitoring system and the automatic alarm system are in signal connection with the PLC module.
Compared with the prior art, the invention has the following technical effects:
the intelligent airtight detection test bed provided by the invention has a simple structure, test gas enters the test bed through the air inlet pipe interface, pressure data and temperature data of the gas are respectively measured through the pressure sensor and the temperature sensor, the PLC module carries out real-time monitoring, recording and intelligent analysis on the corresponding test data, so that an accurate and reliable test conclusion is obtained, and the electrical system in the PLC module controls the on-off of the electromagnetic valve, so that the accurate control on the boosting pressure is realized, and the overpressure risk can be effectively prevented. The test bed can be used for boosting in stages, gas can automatically enter a pressure maintaining stage after boosting is completed, the pressure difference between the gas at the beginning of the experiment and the gas at the end of the experiment can be analyzed by the PLC module to judge the result of the gas tightness experiment in the pressure maintaining process, no specially-assigned person is required to watch in the whole experiment process, the automation degree is high, the experiment result is accurate and reliable, the technical problem to be solved by the invention is effectively solved, and the practicability is strong.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of an intelligent airtightness detection test bed according to the present invention;
wherein the reference numerals are: 1. an air inlet pipe; 2. a filter; 3. testing the air pipe; 4. a first pressure sensor; 5. a second pressure sensor; 6. a temperature sensor; 7. a PLC module; 8. a touch panel; 9. a collector pipe; 10. an electromagnetic valve; 11. a ball valve; 12. a pressure gauge; 13. a right angle valve; 14. a refrigeration unit; 15. experiment air source.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an intelligent air tightness test bed which is simple in structure, high in automation degree and accurate and reliable in experimental result.
Based on the intelligent airtight detection test bed, the intelligent airtight detection test bed comprises an air inlet pipe, a filter, test air pipes, a pressure sensor, a temperature sensor, a PLC module and a touch panel, wherein one end of the air inlet pipe is used for being connected with an experiment air source, the filter is arranged on the air inlet pipe, more than one test air pipe is connected to the other end of the air inlet pipe in parallel, an electromagnetic valve, the pressure sensor and the temperature sensor are sequentially arranged on each test air pipe along the air flow direction, and the exhaust end of each test air pipe is used for being connected with the interior of a refrigerating unit; solenoid valve, pressure sensor and temperature sensor all are connected with the PLC module electricity, PLC module and touch panel signal connection.
The intelligent airtight detection test bed provided by the invention has a simple structure, test gas enters the test bed through the air inlet pipe interface, pressure data and temperature data of the gas are respectively measured through the pressure sensor and the temperature sensor, the PLC module carries out real-time monitoring, recording and intelligent analysis on the corresponding test data, so that an accurate and reliable test conclusion is obtained, and the electrical system in the PLC module controls the on-off of the electromagnetic valve, so that the accurate control on the boosting pressure is realized, and the overpressure risk can be effectively prevented. The test bed can be used for boosting in stages, gas can automatically enter a pressure maintaining stage after boosting is completed, the pressure difference between the gas at the beginning of the experiment and the gas at the end of the experiment can be analyzed by the PLC module to judge the result of the gas tightness experiment in the pressure maintaining process, no specially-assigned person is required to watch in the whole experiment process, the automation degree is high, the experiment result is accurate and reliable, the technical problem to be solved by the invention is effectively solved, and the practicability is strong.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides an intelligent airtight detection test bed, which includes an air inlet pipe 1, a filter 2, test air pipes 3, a pressure sensor, a temperature sensor 6, a PLC module 7 and a touch panel 8, wherein one end of the air inlet pipe 1 is used for being connected with an experiment air source 15, the air inlet pipe 1 is provided with the filter 2, more than one test air pipes 3 are connected in parallel with the other end of the air inlet pipe 1, each test air pipe 3 is sequentially provided with an electromagnetic valve, a pressure sensor and a temperature sensor 6 along an air flow direction, and an exhaust end of each test air pipe 3 is used for being connected with an internal related component of a refrigeration unit 14 to be; the electromagnetic valve, the pressure sensor and the temperature sensor 6 are electrically connected with the PLC module 7 in a conventional control connection mode, and meanwhile, the PLC module 7 is in signal connection with the touch panel 8. The PLC module 7 is an existing programmable logic controller, and in this embodiment, the programmable logic controller is configured to perform real-time monitoring, recording, and intelligent analysis on experimental data, and perform on-off control on other components such as the solenoid valve, and the specific programming is performed by using an existing program, which is not described herein again.
In this embodiment, as shown in fig. 1, preferably, three test air pipes 3 are connected in parallel, and the three test air pipes 3 are connected in parallel with the air outlet end of the air inlet pipe 1 through a collecting pipe 9. Wherein, the exhaust end of three experimental trachea 3 is used for being connected with the inside relevant component of the refrigerating unit 14 that awaits measuring, and every experimental trachea 3 adopts the inside connection form of trachea and refrigerating unit among the existing refrigerating unit gas tightness experiment with refrigerating unit 14, no longer gives details here.
Further, as shown in fig. 1, each test air tube 3 is provided with an electromagnetic valve 10, and each electromagnetic valve 10 is electrically connected with the PLC module 7 in a conventional control connection manner.
Further, as shown in fig. 1, the pressure sensor includes a first pressure sensor 4 and a second pressure sensor 5 which are sequentially arranged along the airflow direction, and the existing electronic pressure sensor is preferably used for each of the first pressure sensor 4 and the second pressure sensor 5.
Further, as shown in fig. 1, a ball valve 11 is further arranged on each test air pipe 3 between the electromagnetic valve 10 and the first pressure sensor 4, the ball valve 11 is electrically connected with the PLC module 7 in a conventional control connection mode, and the ball valve 11 is additionally arranged on each test air pipe 3, so that the on-off precision of gas can be improved, the precision control of the boost pressure by the PLC module 7 is further improved, and the overpressure risk can be effectively prevented. The ball valve 11 is a valve component commonly used in the art, and the detailed structure and the operation principle thereof are not described herein again.
Furthermore, as shown in fig. 1, the first pressure sensor 4 of each test air tube 3 is connected to a pressure gauge 12, and the second pressure sensor 5 of each test air tube 3 is electrically connected to the PLC module in a conventional control connection manner. Set up first pressure sensor 4 and second pressure sensor 5 simultaneously, be favorable to improving the experiment precision, simultaneously, all be connected every first pressure sensor 4 with a manometer 12, the operating personnel of being convenient for directly reads out the pressure value of the gas in the test trachea 3 this moment. In this embodiment, the pressure gauge 12 is preferably a digital pressure gauge, which is an existing pressure gauge component, and the specific structure and the working principle thereof are not described herein again.
Further, as shown in fig. 1, a right angle valve 13 is respectively arranged at the rear end of each test air pipe 3 located at the temperature sensor 6, and each right angle valve 13 is electrically connected with the PLC module 7 in a conventional control connection manner. The right angle valve 13 is a conventional valve component in the art, and the specific structure and operation principle thereof are not described in detail herein.
Further, as shown in fig. 1, the experimental gas source 15 of the present embodiment is preferably a high-pressure nitrogen gas source.
Furthermore, the automatic air tightness test device further comprises an automatic monitoring system and an automatic alarm system, wherein the automatic monitoring system and the automatic alarm system are in signal connection with the PLC module, the automatic air tightness test can be automatically carried out through the PLC module 7, the automatic monitoring system and the automatic alarm system, a specially-assigned person is not required to be assigned for watching, and the practicability is high.
The following is a description of the specific operation principle of the present embodiment.
High-pressure nitrogen gas for experiments passes through the interface entering test bench of intake pipe 1, through first pressure sensor 4, second pressure sensor 5 and temperature sensor 6 measure this moment test trachea 3 in high-pressure nitrogen's pressure data and temperature data, carry out intelligent analysis after the experimental data of each sensor are gathered to PLC module 7, later control solenoid valve 10 and ball valve 11's break respectively through the electrical system in the PLC module 7, thereby realize the accurate control to pressure that steps up, high-pressure nitrogen gas passes through right angle valve 13 and gets into in refrigerating unit 14 when solenoid valve 10 and ball valve 11 all open. This test bench can step up in four stages, and can get into the pressurize stage automatically after gaseous the completion that steps up: the pressure of the first stage is increased to 5bar for the first time, the pressure is increased to 1obar in the second stage after the pressure is stabilized for 30min, the pressure is increased to 15bar in the third stage after the pressure is stabilized for 30min, the pressure is increased to 20bar in the fourth stage after the pressure is stabilized for 30min, the pressure increase is stopped, automatic pressure maintaining monitoring is carried out, pressure maintaining data are recorded, in the pressure maintaining process, the pressure difference between the gas at the beginning of the experiment and the gas at the end of the experiment can be analyzed by the PLC module 7 to judge the result of the gas tightness experiment, the gas tightness is qualified if the pressure difference is within the preset standard range, otherwise, the gas tightness is unqualified, and different values can be preset according to different standard requirements for the pressure values of all stages. The test bed of the embodiment automatically controls the pressure boosting stage in the air tightness test, so that the condition of overpressure can be effectively prevented; meanwhile, the judgment on the air tightness experiment result is more accurate, and the interference of the external environment can be automatically filtered; in addition, the air tightness experiment can be automatically carried out through the PLC module 7, the automatic monitoring system and the automatic alarm system, a specially-assigned person is not required to be sent for watching, and the practicability is high.
Therefore, the intelligent airtight detection test bed provided by the invention is simple in structure, test gas enters the test bed through the air inlet pipe interface, the pressure data and the temperature data of the gas are respectively measured through the pressure sensor and the temperature sensor, the PLC module carries out real-time monitoring, recording and intelligent analysis on the corresponding test data, so that an accurate and reliable test conclusion is obtained, the electromagnetic valve is controlled to be switched on and off through an electrical system in the PLC module, accurate control on boosting pressure is realized, and overpressure risk can be effectively prevented. The test bed can be used for boosting in stages, gas can automatically enter a pressure maintaining stage after boosting is completed, the pressure difference between the gas at the beginning of the experiment and the gas at the end of the experiment can be analyzed by the PLC module to judge the result of the gas tightness experiment in the pressure maintaining process, no specially-assigned person is required to watch in the whole experiment process, the automation degree is high, the experiment result is accurate and reliable, the technical problem to be solved by the invention is effectively solved, and the practicability is strong.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (8)

1. The utility model provides an intelligent gas tightness detection test bench which characterized in that: the air inlet pipe is provided with the filter, more than one test air pipe is connected to the other end of the air inlet pipe in parallel, each test air pipe is sequentially provided with an electromagnetic valve, the pressure sensor and the temperature sensor along the air flow direction, and the exhaust end of each test air pipe is used for being connected with the interior of a refrigerating unit; the electromagnetic valve, the pressure sensor and the temperature sensor are all electrically connected with the PLC module, and the PLC module is in signal connection with the touch panel.
2. The intelligent airtightness detection test stand according to claim 1, wherein: the test air pipes are three and are connected with the air inlet pipe through a collecting pipe.
3. The intelligent airtightness detection test stand according to claim 1, wherein: the pressure sensor comprises a first pressure sensor and a second pressure sensor which are sequentially arranged along the airflow direction, and the first pressure sensor and the second pressure sensor are electronic pressure sensors.
4. The intelligent airtightness detection test stand according to claim 3, wherein: each test air pipe is provided with a ball valve between the electromagnetic valve and the first pressure sensor, and the ball valve is electrically connected with the PLC module.
5. The intelligent airtightness detection test stand according to claim 3, wherein: and each first pressure sensor on the test air pipe is respectively connected with a pressure gauge, and each second pressure sensor on the test air pipe is electrically connected with the PLC module.
6. The intelligent airtightness detection test stand according to claim 1, wherein: and a right-angle valve is respectively arranged at the rear end of the temperature sensor on each test air pipe.
7. The intelligent airtightness detection test stand according to claim 1, wherein: the experimental gas source is a high-pressure nitrogen source.
8. The intelligent airtightness detection test stand according to claim 1, wherein: the automatic monitoring system and the automatic alarm system are in signal connection with the PLC module.
CN201910366513.7A 2019-05-05 2019-05-05 Intelligent airtight detection test bed Pending CN110940468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910366513.7A CN110940468A (en) 2019-05-05 2019-05-05 Intelligent airtight detection test bed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910366513.7A CN110940468A (en) 2019-05-05 2019-05-05 Intelligent airtight detection test bed

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CN110940468A true CN110940468A (en) 2020-03-31

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112113710A (en) * 2020-09-11 2020-12-22 广东稳固检测鉴定有限公司 Fluctuation pressurization control system and method for building curtain wall detection
CN114216631A (en) * 2021-01-12 2022-03-22 襄阳达安汽车检测中心有限公司 High-low temperature air tightness test system for automobile brake hose
CN114216631B (en) * 2021-01-12 2022-10-21 襄阳达安汽车检测中心有限公司 High-low temperature air tightness test system for automobile brake hose

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112113710A (en) * 2020-09-11 2020-12-22 广东稳固检测鉴定有限公司 Fluctuation pressurization control system and method for building curtain wall detection
CN114216631A (en) * 2021-01-12 2022-03-22 襄阳达安汽车检测中心有限公司 High-low temperature air tightness test system for automobile brake hose
CN114216631B (en) * 2021-01-12 2022-10-21 襄阳达安汽车检测中心有限公司 High-low temperature air tightness test system for automobile brake hose

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