CN111912584A - Air tightness detection device for electric locomotive air supply system - Google Patents
Air tightness detection device for electric locomotive air supply system Download PDFInfo
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- CN111912584A CN111912584A CN201910553909.2A CN201910553909A CN111912584A CN 111912584 A CN111912584 A CN 111912584A CN 201910553909 A CN201910553909 A CN 201910553909A CN 111912584 A CN111912584 A CN 111912584A
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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
- G01M3/28—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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Abstract
The utility model relates to a locomotive technical field especially relates to an air tightness detection device for electric locomotive gas supply system. This gas tightness detection device includes ventilation pipe and detection component, wherein: the ventilation pipe comprises a first pipe body, a second pipe body, a first valve and a second valve; the first pipe body is provided with an air inlet and an air outlet; the first valve is arranged between the air inlet and the air outlet; the second pipe body is communicated with the first pipe body, and the communication position is positioned between the first valve and the air outlet; the second valve is arranged between the communication part and the air outlet of the second pipe body; the detection assembly comprises a pressure sensor, a recorder and an industrial computer; the pressure sensor is arranged between the first valve and the air outlet; the recorder is used for recording pressure data detected by the pressure sensor; an industrial computer is used to receive the pressure data. The air tightness detection device can automatically detect the air tightness of the electric locomotive air supply system, not only improves the accuracy of the detection process, but also improves the test efficiency, and further saves the labor cost.
Description
Technical Field
The disclosure relates to the technical field of locomotives, in particular to an electric locomotive air tightness test detection device.
Background
In recent years, with the rapid development of the railway transportation industry, electric locomotives that pull or push railway vehicles to operate have also been rapidly developed. Before the electric locomotive is put into use, the air tightness of the electric locomotive air supply system needs to be detected so as to ensure the reliability of the electric locomotive air supply system.
In the prior art, the detection of the air tightness of the air supply system of the electric locomotive is usually completed by manual operation, specifically, a tester utilizes a vent pipe to inject compressed air into a main air pipeline, a train pipeline and an average air pipeline of the air supply system in sequence, measures the air pressure in the main air pipeline, the train pipeline and the average air pipeline, waits for a period of time, measures the air pressure in the main air pipeline, the train pipeline and the average air pipeline again, and evaluates the air tightness of the air supply system of the electric locomotive according to the previous and next measurement results so as to complete the detection of the air tightness of the air supply system of the electric locomotive.
It is easy to understand that manual operation is not only inefficient, but also easily causes fatigue of testers, resulting in deviation or error of recorded data, and further reducing the reliability of test results.
The above information disclosed in the background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute prior art that is known to a person of ordinary skill in the art.
Disclosure of Invention
The air tightness detection device for the electric locomotive air supply system can automatically detect the air tightness of the electric locomotive air supply system, not only improves the accuracy of a detection process, but also improves the test efficiency, and further saves labor cost.
In order to achieve the purpose, the technical scheme adopted by the disclosure is as follows:
according to an aspect of the present disclosure, there is provided an air-tightness detecting device for an electric locomotive air supply system, the air-tightness detecting device including:
the ventilation pipe comprises a first pipe body, a second pipe body, a first valve and a second valve; the first pipe body is provided with an air inlet and an air outlet, the air inlet can be communicated with air source equipment, and the air outlet can be communicated with a pipeline to be tested of an electric locomotive air supply system; the first valve is arranged on the first pipe body and is positioned between the air inlet and the air outlet; one end of the second pipe body is communicated with the first pipe body, and the communication position of the second pipe body and the first pipe body is positioned between the first valve and the air outlet; the other end of the second pipe body is provided with an air outlet; the second valve is arranged on the second pipe body and is positioned between the air outlet and the communication part;
the detection assembly comprises a pressure sensor, a recorder and an industrial computer; the pressure sensor is arranged on the first pipe body and is positioned between the first valve and the air outlet; the recorder is connected with the pressure sensor and used for recording pressure data detected by the pressure sensor; and the industrial computer is connected with the recorder and used for receiving the pressure data and determining the air tightness of the pipeline to be tested according to the pressure data.
In an exemplary embodiment of the present disclosure, the number of the ventilation pipes is plural, a plurality of the ventilation pipes are arranged in parallel, and a plurality of the air inlets are communicated with each other.
In an exemplary embodiment of the disclosure, the number of the ventilation pipes is three, the pipeline to be tested includes a total air pipeline, a train pipeline and an average air pipeline, and the three air outlets are respectively communicated with the total air pipeline, the train pipeline and the average air pipeline.
In an exemplary embodiment of the disclosure, a pressure reducing valve is disposed between the air inlet and the first valve, and is used for reducing a pressure value of the compressed gas generated by the wind source equipment to a desired value.
In an exemplary embodiment of the present disclosure, a shut-off valve is provided between the discharge port and the second valve to adjust a discharge speed of the compressed gas.
In an exemplary embodiment of the present disclosure, the exhaust port is communicated with a muffler for reducing noise when the compressed gas is exhausted.
In an exemplary embodiment of the disclosure, a pressure gauge is arranged between the first valve and the air outlet and is used for detecting a pressure value in the pipeline to be detected.
In an exemplary embodiment of the present disclosure, the airtightness detection apparatus further includes:
the connecting pipe comprises two oppositely-arranged threaded joints and a pipe body connected with the two threaded joints, and the threaded joints are in threaded connection with the air outlet and the pipeline to be detected.
In an exemplary embodiment of the present disclosure, the detection assembly further includes:
the fixing piece is provided with a groove and an outward flange, the outward flange is arranged at the edge of the groove, the pressure sensor is positioned in the groove, and the outward flange can be fixedly connected with the first pipe body, so that the sensing surface of the pressure sensor is attached to the first pipe body.
In an exemplary embodiment of the present disclosure, an elastic member is disposed between the pressure sensor and the groove bottom of the groove.
In the test process, firstly, the first valve is opened, the second valve is closed, compressed gas generated by the wind source equipment can enter a pipeline to be tested of an electric locomotive gas supply system through the air inlet, the first valve and the air outlet, the pipeline to be tested is communicated with the first pipe body, so that the pressure value in the first pipe body is equal to the pressure value in the pipeline to be tested, and the pressure sensor arranged on the first pipe body can detect the pressure value in the pipeline to be tested; secondly, closing the first valve, keeping the second valve closed, and waiting for a period of time, wherein it is easy to understand that the pipeline to be measured inevitably has a certain degree of air leakage, so that the pressure value in the pipeline to be measured is inevitably reduced to a certain degree, and at the moment, the pressure sensor is used again to measure the pressure value in the pipeline to be measured; and finally, keeping the first valve closed and opening the second valve, and discharging compressed gas in the pipeline to be detected and the first pipe body through an air outlet of the second pipe body so as to complete the whole operation process.
The pressure sensor can detect the pressure value in the pipeline to be detected and generate pressure data, the recorder connected with the pressure sensor can record the pressure data in the pipeline to be detected in real time, and the industrial computer connected with the recorder can receive the pressure data and determine the air tightness of the pipeline to be detected according to the received pressure data. Compared with the traditional manual operation, the air tightness detection device can automatically detect the air tightness of the electric locomotive air supply system, not only improves the accuracy of the detection process, but also improves the test efficiency, and further saves the labor cost.
In addition, after the detection process is completed, compressed gas in the pipeline to be detected and the first pipe body can be discharged through the air outlet of the second pipe body, and compared with a scheme that the first pipe body is detached from the pipeline to be detected in manual operation so that the compressed gas is discharged through the air outlet of the first pipe body, the air tightness detection device can realize air exhaust only by opening the second valve, not only is the operation simple, but also potential safety hazards (a connecting part of the first pipe body and the pipeline to be detected drops to injure a tester, the compressed gas blows down the tester and the like) when the first pipe body and the pipeline to be detected are detached can be eliminated, and further the safety of the detection process is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a schematic view of a gas tightness detection device according to an embodiment of the present disclosure.
Fig. 2 is an assembly schematic diagram of a first tubular body, a pressure sensor, a fixing member, and an elastic member according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a connection tube according to an embodiment of the present disclosure.
In the figure: 100. a pipeline to be tested; 200. a wind source device; 1. a vent pipe; 11. a first pipe body; 111. an air inlet; 112. an air outlet; 12. a second tube body; 120. a communication part; 121. an air outlet; 13. a first valve; 14. a second valve; 15. a pressure reducing valve; 16. a shut-off valve; 17. a muffler; 18. a filter; 19. a pressure gauge; 2. a pressure sensor; 3. a fixing member; 31. a groove; 32. flanging; 33. a threaded member; 4. an elastic member; 5. a connecting pipe; 51. a threaded joint; 52. a tube body.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the primary technical ideas of the disclosure.
Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is turned upside down, the "up" component will become the "down" component. Other relative terms, such as "high," "low," "top," "bottom," "left," "right," and the like are also intended to have similar meanings.
When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure. The terms "a", "an", "the" are used to indicate the presence of one or more sets of elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. The terms "first" and "second", etc. are used merely as labels, and are not limiting on the number of their objects.
The embodiment of the present disclosure provides an air tightness detection device for an electric locomotive air supply system, which is used for detecting the air tightness of a pipeline 100 to be tested of the electric locomotive air supply system. For example, the pipeline 100 to be tested may include a main wind pipeline, a train pipeline, an average wind pipeline, and the like. In the detection process, the air tightness of the main air pipeline, the train pipeline and the average air pipeline can be detected one by one, so that the pipelines with unqualified air tightness can be maintained or replaced.
As shown in fig. 1, the airtightness detection apparatus may include a vent pipe 1 and a detection module, wherein:
the vent 1 may comprise a first tube 11, a second tube 12, a first valve 13 and a second valve 14; the air inlet 111 of the first pipe 11 can be communicated with the air source equipment 200, and the air outlet 112 of the first pipe 11 can be communicated with the pipeline 100 to be tested of the electric locomotive air supply system; the first valve 13 may be disposed in the first tube 11 and may be located between the air inlet 111 and the air outlet 112; the second tube 12 is communicated with the first tube 11, and a communication part 120 between the second tube 12 and the first tube 11 can be located between the first valve 14 and the air outlet 112; the second valve 14 may be disposed in the second pipe 12 and may be located between the air outlet 121 and the communication portion 120.
In the test process, firstly, the first valve 13 is opened, the second valve 14 is closed, then the compressed gas generated by the air source equipment 200 can enter the pipeline 100 to be tested through the air inlet 111, the first valve 13 and the air outlet 112, because the pipeline 100 to be tested is communicated with the first pipe body 11, the pressure value in the first pipe body 11 is equal to the pressure value in the pipeline 100 to be tested, and then the pressure sensor 2 arranged on the first pipe body 11 can detect the pressure value in the pipeline 100 to be tested; secondly, closing the first valve 13, keeping the second valve 14 closed, and waiting for a period of time, it is easy to understand that the pipeline 100 to be measured inevitably has a certain degree of air leakage, so that the pressure value in the pipeline 100 to be measured is inevitably reduced to a certain degree, and at this time, the pressure sensor 2 is used again to measure the pressure value in the pipeline 100 to be measured; finally, keeping the first valve 13 closed and the second valve 14 open, the compressed gas in the pipeline 100 to be tested and the first pipe 11 can be exhausted through the exhaust port 121 of the second pipe 12, so as to complete the whole operation process.
The pressure sensor 2 can detect the pressure value in the pipeline 100 to be detected and generate pressure data, the recorder connected with the pressure sensor 2 in the detection assembly can record the pressure data in the pipeline 100 to be detected in real time, and the industrial computer connected with the recorder can receive the pressure data and determine the air tightness of the pipeline 100 to be detected according to the received pressure data. Compared with the traditional manual operation, the air tightness detection device can automatically detect the air tightness of the pipeline 100 to be detected, not only improves the accuracy of the detection process, but also improves the test efficiency, and further saves the labor cost.
In addition, after the detection process is completed, the compressed gas in the pipeline 100 to be detected and the first pipe body 11 can be discharged through the air outlet 121, and compared with a method of detaching the first pipe body 11 from the pipeline 100 to be detected in manual operation so that the compressed gas can be discharged through the air outlet 112, the air tightness detection device can realize air exhaust only by opening the second valve 13, not only is the operation simple, but also safety accidents (the first pipe body 11 falls off and damages testers, the compressed gas blows over the testers and the like) when the first pipe body 11 and the pipeline 100 to be detected are detached can be avoided, and further the safety of the detection process is improved.
The following describes each component of the air-tightness detecting device according to the embodiment of the present disclosure in detail with reference to the accompanying drawings:
as shown in fig. 1, the ventilation pipe 1 is used for communicating a wind source device 200 and a pipeline 100 to be tested of an electric locomotive gas supply system, so that compressed gas generated by the wind source device 200 enters the pipeline 100 to be tested through the ventilation pipe 1. The number of the ventilation pipes 1 may be multiple, the ventilation pipes 1 are arranged in parallel, and the air inlets 111 of the ventilation pipes 1 are all communicated with the air source equipment 200, that is, the air inlets 111 are communicated with each other.
For example, the number of the ventilation pipes 1 is three, the air inlets 111 of the three ventilation pipes 1 are all communicated with the air source device 200, and the air outlets 112 of the three ventilation pipes 1 are respectively communicated with the total air pipeline, the train pipeline and the average air pipeline of the pipeline 100 to be tested, and respectively form a first branch L1, a second branch L2 and a third branch L3. At this moment, can once only accomplish the installation of ventilation pipe 1 in the three branch road, detect the gas tightness of total wind pipeline, train pipeline and average wind pipeline in the three branch road one by one again, compare in prior art dismouting ventilation pipe 1 repeatedly, the gas tightness detection device's of this application operation process is comparatively simple.
Since the working standard pressure values of the main air pipeline, the train pipeline and the average air pipeline in the pipeline 100 to be tested are not the same, specifically, the working standard pressure value of the main air pipeline in the first branch line L1 is 900kPa, the working standard pressure value of the train pipeline in the second branch line L2 is 600kPa, and the working standard pressure value of the average air pipeline in the third branch line L3 is 600kPa, and the pressure value of the compressed gas provided by the wind source equipment 200 is fixed, a pressure reducing valve 15 may be disposed between the air inlet 111 of the three first pipe bodies 11 and the first valve 13, where the pressure reducing valve 15 is configured to reduce the pressure value of the compressed gas generated by the wind source equipment 200 to a desired value, that is, the pressure reducing valve 15 may be capable of reducing the pressure value of the compressed gas to the working standard pressure value of each pipeline.
After the detection process is finished, the compressed gas in the pipeline 100 to be detected and the first pipe 11 needs to be discharged through the air outlet 121, because the pressure value of the compressed gas is very high, a cut-off valve 16 can be arranged between the air outlet 121 of the three second pipes 12 and the second valve 14, and the cut-off valve 16 is used for adjusting the discharge speed of the compressed gas so that the compressed gas can be slowly discharged; on the other hand, since the compressed gas generates noise when discharged from the discharge port 121, the discharge port 121 is communicated with a muffler 17, and the muffler 17 can reduce the noise when the compressed gas is discharged, thereby improving the test environment.
It should be noted that a filter 18 may be further disposed between the wind source equipment 200 and the three ventilation pipes 1, and the filter 18 is capable of filtering the compressed gas generated by the wind source equipment 200, and of course, the filter 18 may also be a component of the wind source equipment 200, and is not particularly limited herein.
The detection assembly of the embodiment of the present disclosure is configured to detect a pressure value of the pipeline 100 to be detected and generate pressure data, and determine the air tightness of the pipeline 100 to be detected according to the detected pressure data. For example, the detection assembly may include a pressure sensor 2, a recorder, and an industrial computer, wherein:
the pressure sensor 2 can be arranged in the first pipe 11 and located between the first valve 13 and the air outlet 112, and because the pipeline 100 to be measured is communicated with the first pipe 11, the pressure value in the first pipe 11 is equal to the pressure value in the pipeline 100 to be measured, and the pressure sensor 2 can detect the pressure value in the pipeline 100 to be measured and generate pressure data; the recorder is connected with the pressure sensor 2 and used for recording pressure data detected by the pressure sensor 2; the industrial computer is connected to the recorder and is used for receiving the pressure data and determining the air tightness of the pipeline 100 to be measured according to the received pressure data.
Specifically, because the pipeline 100 to be tested inevitably has a certain degree of gas leakage, the pressure value in the pipeline 100 to be tested is reduced to a certain degree, so, need wait for a period of time after being full of compressed gas for the pipeline 100 to be tested to make compressed gas can reveal away. For example, the value of the waiting duration may range from 5min to 10min, and is not particularly limited herein.
The industrial computer can receive the pressure data of the pipeline 100, calculate the change rate of the pressure data of the pipeline 100 to be tested (i.e. the pressure drop rate of the compressed gas in the pipeline 100 to be tested) by combining the time factor, and determine the air tightness of the pipeline 100 to be tested according to the pressure drop rate. For example, when the pressure drop rate is less than or equal to 10kPa/min, the airtightness of the pipeline 100 to be tested can be considered to meet the requirement, and of course, the pressure drop rate can also be greater than 10kPa/min, which is not particularly limited herein.
It should be noted that a pressure gauge 19 may be further disposed between the first valve 13 and the air outlet 112 of the three ventilation pipes 1, and the pressure gauge 19 may also be capable of detecting a pressure value in the pipeline 100 to be detected and mutually detecting the pressure value with a detection value of the pressure sensor 2, so as to improve accuracy of a detection result.
The detection assembly of the embodiment of the present disclosure may further include a fixing member 3, where the fixing member 3 may fix the pressure sensor 2 on the first pipe 11 and support the pressure sensor 2, so that the sensing surface of the pressure sensor 2 is tightly attached to the first pipe 11, thereby improving the accuracy of the detection.
As shown in fig. 2, the fixing member 3 may have a groove 31 and a flange 32, wherein: the outward flange 32 can be arranged at the edge of the groove 31 and is fixedly connected with the first pipe body 11 through connecting pieces such as a threaded piece 33 and the like; the groove 31 is used for placing the pressure sensor 2, and when the outward flange 32 is fixedly connected with the first pipe body 11, the bottom of the groove 31 can prop against the pressure sensor 2, so that the sensing surface of the pressure sensor 2 is tightly attached to the first pipe body 11.
In this case, an elastic member 4 may be further disposed between the pressure sensor 2 and the bottom of the groove 31, for example, the elastic member 4 may be a spring, and when the outward flange 32 is fixedly connected with the first tube 11, the spring is in a compressed state, and at this time, the spring can apply an acting force to the pressure sensor 2 toward the first tube 11, so that the sensing surface of the pressure sensor 2 can be tightly attached to the first tube 11.
Of course, the pressure sensor 2 may have a protruding screw portion, and the first pipe 11 may have a recessed screw portion, and the screw portion are screw-coupled, so that the pressure sensor 2 can be tightly attached to the first pipe 11.
The air tightness detecting device of the embodiment of the present disclosure may further include a connection pipe 5 for connecting the first pipe 11 and the pipeline 100 to be detected. As shown in fig. 3, the connection pipe 5 may include two threaded joints 51 with opposite threads and a pipe body 52 connecting the two threaded joints 51, wherein:
one of the screw joints 51 may be screwed with the air outlet 112 of the first tube 11, and the other screw joint 51 may be screwed with the pipeline 100 to be tested, so as to realize a stable connection between the first tube 11 and the pipeline 100 to be tested. Of course, the threaded joint 51 may also be a chuck, and at this time, a clamping groove capable of being clamped with the chuck needs to be provided on the first pipe body 11 and the pipeline 100 to be measured, which will not be described in detail herein.
It is to be understood that the disclosure is not limited in its application to the details of construction and the arrangements of the components set forth in the specification. The present disclosure is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications are within the scope of the present disclosure. It should be understood that the disclosure disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute sets of alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best mode known for carrying out the disclosure and will enable those skilled in the art to utilize the disclosure.
Claims (10)
1. The utility model provides an air tightness detection device for electric locomotive air supply system which characterized in that, air tightness detection device includes:
the ventilation pipe comprises a first pipe body, a second pipe body, a first valve and a second valve; the first pipe body is provided with an air inlet and an air outlet, the air inlet can be communicated with air source equipment, and the air outlet can be communicated with a pipeline to be tested of an electric locomotive air supply system; the first valve is arranged on the first pipe body and is positioned between the air inlet and the air outlet; one end of the second pipe body is communicated with the first pipe body, the communication position of the second pipe body and the first pipe body is positioned between the first valve and the air outlet, and the other end of the second pipe body is provided with an air outlet; the second valve is arranged on the second pipe body and is positioned between the air outlet and the communication part;
the detection assembly comprises a pressure sensor, a recorder and an industrial computer; the pressure sensor is arranged on the first pipe body and is positioned between the first valve and the air outlet; the recorder is connected with the pressure sensor and used for recording pressure data detected by the pressure sensor; and the industrial computer is connected with the recorder and used for receiving the pressure data and determining the air tightness of the pipeline to be tested according to the pressure data.
2. The airtightness detection apparatus according to claim 1, wherein the number of the ventilation pipes is plural, a plurality of the ventilation pipes are arranged in parallel, and the plurality of the air inlets are communicated with each other.
3. The airtightness detection device according to claim 2, wherein the number of the ventilation pipes is three, the pipeline to be detected includes a main air pipeline, a train pipeline and an average air pipeline, and the three air outlets are respectively communicated with the main air pipeline, the train pipeline and the average air pipeline.
4. The airtightness detection apparatus according to claim 1, wherein a pressure reducing valve is provided between the air inlet and the first valve, and is configured to reduce a pressure value of the compressed gas generated by the air source device to a desired value.
5. The airtightness detection apparatus according to claim 4, wherein a shutoff valve is provided between the air outlet and the second valve for adjusting a discharge speed of the compressed gas.
6. The airtightness detection apparatus according to claim 5, wherein the air outlet is communicated with a muffler for reducing noise when the compressed gas is discharged.
7. The airtightness detection apparatus according to claim 1, wherein a pressure gauge is provided between the first valve and the air outlet, and is configured to detect a pressure value in the pipeline to be detected.
8. The airtightness detection apparatus according to claim 1, further comprising:
the connecting pipe comprises two oppositely-arranged threaded joints and a pipe body connected with the two threaded joints, and the threaded joints are in threaded connection with the air outlet and the pipeline to be detected.
9. The hermeticity detection device according to claim 1, wherein the detection assembly further comprises:
the fixing piece is provided with a groove and an outward flange, the outward flange is arranged at the edge of the groove, the pressure sensor is positioned in the groove, and the outward flange can be fixedly connected with the first pipe body, so that the sensing surface of the pressure sensor is attached to the first pipe body.
10. The airtightness detection apparatus according to claim 9, wherein an elastic member is provided between the pressure sensor and the groove bottom of the groove.
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| CN201910553909.2A CN111912584A (en) | 2019-06-25 | 2019-06-25 | Air tightness detection device for electric locomotive air supply system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115307061A (en) * | 2022-08-18 | 2022-11-08 | 中车大同电力机车有限公司 | Gas circulation device and method for gas tightness test |
| CN116593091A (en) * | 2023-05-12 | 2023-08-15 | 山东郓城金达挂车制造有限公司 | Semitrailer air tightness test tool |
| CN115307061B (en) * | 2022-08-18 | 2024-06-11 | 中车大同电力机车有限公司 | Gas circulation device and method for air tightness test |
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