CN217276753U - Valve air tightness detection device - Google Patents
Valve air tightness detection device Download PDFInfo
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- CN217276753U CN217276753U CN202220922720.3U CN202220922720U CN217276753U CN 217276753 U CN217276753 U CN 217276753U CN 202220922720 U CN202220922720 U CN 202220922720U CN 217276753 U CN217276753 U CN 217276753U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/34—Hydrogen distribution
Abstract
The utility model discloses a valve air tightness detection device, which comprises an air station, a negative pressure generator, a gas mass flowmeter, a test bench and pipelines for connecting all the parts; the gas station provides a compressed gas source for the negative pressure generator, the inlet P of the negative pressure generator is used as a gas inlet, the inlet V of the negative pressure generator is a gas suction port, the gas suction port is communicated with the outlet of the gas mass flow meter through a pipeline, the inlet of the gas mass flow meter is hermetically connected with the port of a valve workpiece to be tested through a pipeline, and the test bench is used for fixing the valve workpiece to be tested. The utility model discloses a gas station provides the air supply, and pressure is stable, utilizes negative pressure generator and gas mass flowmeter to provide the accurate gas tightness under the negative pressure condition and detects, and the configuration detects the rack and detects the frock, the installation and the connection of the valve class work piece that conveniently awaits measuring to can improve detection efficiency by a wide margin.
Description
Technical Field
The utility model belongs to the technical field of detect, a high accuracy valve type gas tightness detection performance and the improvement of efficiency are related to, specifically are a valve type gas tightness detection device.
Background
The air tightness is a key parameter of the sealing performance of the valve, including the tightness of the valve and the sealing degree of the valve, and particularly for high-precision valve products, the selection and use of the product are more and more concerned by manufacturers and users. For valves which need to meet strict sealing requirements, if the leakage amount exceeds the allowable range in the use process, the reliability of the product is directly influenced, and the serious consequences of explosion, fire and the like can be caused, so that irreparable loss is caused.
However, in the existing valve airtightness detection, gas with a certain pressure is generally filled into a sealed valve workpiece, pressure is maintained for a period of time, whether the pressure is reduced or not is detected, and whether the product leaks or not is judged by observing and calculating the pressure change. It is common to do the experiment at one side of valve, with air pressure, the manometer does not drop to be qualified. However, for high-precision valve products, the requirement on the sealing performance is higher, the maximum gas leakage rate is generally required to be within a range which cannot exceed a few SLPM (static pressure pulse) of zero point, the existing mode and instrument cannot realize accurate detection, and the sealing requirements of connecting ports such as pipelines and the like are high, the installation process is troublesome, and the detection time is long.
As disclosed in chinese patent (publication No. CN214793674U), "an air-tightness detecting device and an air-tightness detecting system" includes a main air supply pipe, a main negative pressure pipe, and a branch testing assembly; the branch testing assembly comprises a branch pipeline, a common pipeline, a negative pressure meter and a sucker, wherein two ends of the branch pipeline are respectively communicated with the main gas supply pipeline and the main negative pressure pipeline, and two ends of the branch pipeline are respectively provided with a first switch valve and a second switch valve; the shared pipeline is connected to the branch pipeline, is positioned between the first switch valve and the second switch valve and is respectively communicated with the branch pipeline, the negative pressure gauge and the sucker; the air tightness detection system comprises an air supply device, a negative pressure pump and the air tightness detection device, wherein the air supply device is communicated with an air supply main pipeline of the air tightness detection device, and the negative pressure pump is communicated with a negative pressure main pipeline of the air tightness detection device.
The technical scheme disclosed by the above improves the test accuracy, but still belongs to the traditional air tightness detection mode of internal inflation, and in addition, the detection efficiency is low due to the detection steps of air suction, air inflation and the like in the operation process.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a valve type gas tightness detection device for solve current high accuracy valve type gas tightness detection efficiency and the lower problem of accuracy nature.
In order to realize the utility model discloses an aim at, adopt following technical scheme:
the valve air tightness detection device comprises a gas station, a negative pressure generator, a gas mass flowmeter, a test bench and pipelines for connecting all the parts; the gas station provides a compressed gas source for the negative pressure generator, the inlet P of the negative pressure generator is used as a gas inlet, the inlet V of the negative pressure generator is a gas suction port, the gas suction port is communicated with the outlet of the gas mass flow meter through a pipeline, the inlet of the gas mass flow meter is hermetically connected with the port of a valve workpiece to be tested through a pipeline, and the test bench is used for fixing the valve workpiece to be tested.
In order to further realize the purpose of the utility model, the following technical scheme can also be adopted:
according to the valve airtightness detection device, an air source triple piece is arranged between the air station and the negative pressure generator, the air source triple piece comprises a pressure reducing valve, a filter and an oil atomizer, an inlet of the pressure reducing valve is communicated with an air supply port of the air station, an outlet of the pressure reducing valve is communicated with an inlet of the filter, an outlet of the filter is communicated with an inlet of the oil atomizer, and an outlet of the oil atomizer is communicated with an inlet P of the negative pressure generator.
According to the valve air tightness detection device, the test tool is arranged on the test bench and used for fixing the valve workpiece to be detected.
The gas mass flow meter is a digital display type flowmeter, the digital display type flowmeter is electrically connected with the controller, and the power supply end of the controller is externally connected with a power supply.
According to the valve airtightness detection device, the controller of the digital display type flowmeter is provided with the alarm buzzer, and the leakage alarm limit value can be set through the controller.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a gas station provides the air supply, and pressure is stable, utilizes negative pressure generator and gas mass flowmeter to provide the accurate gas tightness under the negative pressure condition and detects, and the configuration detects the rack and detects the frock, the installation and the connection of the valve class work piece that conveniently awaits measuring to can improve detection efficiency by a wide margin.
The gas mass flowmeter outputs the air leakage amount of the valve workpiece to be measured through monitoring and outputs the air leakage amount on the controller through analog quantity, and the gas mass flowmeter has the advantages of high measurement precision, good environmental adaptability and real-time display. In addition, still set up warning buzzer on the controller, when the valve class work piece gas leakage volume that awaits measuring surpassed the limit value of settlement, output signal gave warning buzzer warning, is convenient for discern unqualified product fast, improves detection efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic view of the present invention;
FIG. 2 is a schematic structural diagram of the negative pressure generator shown in FIG. 1;
fig. 3 is a schematic structural view of the gas mass flow meter shown in fig. 1.
Reference numerals: 1-a gas station, 2-a gas source triple piece, 21-a filter, 22-a pressure reducing valve, 23-an oil atomizer, 3-a negative pressure generator, 4-a gas mass flowmeter, 41-a flowmeter body, 42-a controller, 5-a test bench, 51-a test tool, 6-a valve workpiece to be tested, 7-a power supply and 8-a pipeline;
the air inlet of the P-negative pressure generator, the air suction port of the V-negative pressure generator, the inlet of the A-gas mass flowmeter and the outlet of the B-gas mass flowmeter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
In the description of the embodiments of the present invention, unless otherwise explicitly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.
As shown in fig. 1, the valve airtightness detection apparatus disclosed in this embodiment includes a gas station 1, a gas source triplet 2, a negative pressure generator 3, a gas mass flow meter 4, a test bench 5, and a pipeline 8 connecting the above components.
In this embodiment, the gas station 1 provides a compressed gas source for the negative pressure generator 3, and provides a gas pressure support for subsequent detection of each component and the valve workpiece 6 to be detected. The gas station 1 may be constituted by a gas tank and a roots blower. Under the continuous detection state, the compressed air consumption of the negative pressure generator 3 is basically stable, so that the volume of the air tank is within 5 cubes, the buffering requirement can be met, and the pressure in the air tank is kept above 0.4 MPa.
As shown in fig. 2, the negative pressure generator 3 is a vacuum generator, and is an efficient, economical, and small-sized vacuum component that generates negative pressure by using a positive pressure gas source. The negative pressure generator 3 should reduce its air consumption on the premise of satisfying the use requirement, the air consumption is related to the supply pressure of the compressed air, and the larger the pressure is, the larger the air consumption of the negative pressure generator 3 is. The selection is therefore made with reference to the supply pressure and the consumption when determining the suction port pressure level. Typically, the suction pressure generated by the negative pressure generator 3 is between 20KPa and 10 KPa. At this time, the pressure of the air supply meter is increased, the pressure at the suction inlet is not reduced, and the air consumption is increased. Thus reducing the pressure at the suction inlet should be considered in terms of controlling the flow rate.
In this embodiment, an inlet P of the negative pressure generator 3 serves as an air inlet, an inlet V of the negative pressure generator 3 serves as an air suction port, the air suction port is communicated with an outlet of the gas mass flow meter 4 through a pipeline, an inlet of the gas mass flow meter 4 is hermetically connected with a port of the valve workpiece 6 to be tested through a pipeline, and the test bench is used for fixing the valve workpiece 6 to be tested.
Continuing with fig. 1, in this embodiment, an air supply triplet 2 is provided between the air station 1 and the negative pressure generator 3. The air source triplet 2 comprises a pressure reducing valve 22, a filter 21 and an oil atomizer 23, wherein an inlet of the pressure reducing valve 22 is communicated with an air supply port of the air station 1, an outlet of the pressure reducing valve 22 is communicated with an inlet of the filter 21, an outlet of the filter 21 is communicated with an inlet of the oil atomizer 23, and an outlet of the oil atomizer 23 is communicated with an inlet P of the negative pressure generator 3.
The pressure reducing valve 22 can stabilize the pressure of the gas source, so that the gas source is in a constant state, and the damage to the negative pressure generator 3, the digital display type gas mass flow meter 4 and other elements when the gas pressure of the gas station 1 suddenly changes can be reduced. And since the air has an absolute pressure of 760mm-Hg and a relative humidity of 75% under ordinary conditions, the weight is 1.293kgf/m 2 Therefore, the air source is cleaned by the filter 21, the moisture and the impurities in the compressed air can be filtered, and the influence of the moisture and the impurities on the product function is avoided. The oil atomizer 23 can lubricate the components, and the service life of the product is prolonged.
After pressure stabilization, filtration and the like are carried out on the compressed air through the air source triple piece 2, the compressed air is input from an air inlet of the negative pressure generator 3, and the stable compressed air is converted into air with pressure lower than atmospheric pressure and suction. The air suction port of the negative pressure generator 3 is connected with the outlet B of the gas mass flowmeter 4.
The test bench 5 is used as a fixed frame, a test tool 51 is arranged on the table top, and the test tool 51 is used for fixedly placing a valve workpiece 6 to be tested. The test fixture 51 may be disposed at the measuring port end of the test bench 5, and the test fixture 51 of the corresponding specification may be selected according to different workpieces to be tested.
The inlet A of the gas mass flowmeter 4 is hermetically connected with a valve workpiece 6 to be measured, and the outlet B of the mass flowmeter is connected with the air suction port of the negative pressure generator 3.
The gas mass flow meter 4 of the present embodiment is a digital display type flow meter, and includes a flow meter body 41 and a controller 42 provided outside, the controller 42 is electrically connected to the flow meter body 41, and the external power supply 7 supplies power to the digital display type flow meter.
During the use, with valve class work piece 6 fixed mounting that awaits measuring on test fixture 51, the air leakage quantity of this work piece of gas mass flow meter 4 real-time supervision to with analog quantity output on the display screen, can realize detecting the purpose of being surveyed the work piece leakproofness product performance. Make the utility model has the advantages of measurement accuracy is high, and environmental suitability is good, but real-time display.
Further, according to the above configuration, in order to quickly identify the defective product in the detection step, the controller 42 of the gas mass flow meter 4 is integrated with the alarm buzzer, and the controller 42 can set a leakage alarm limit value. For example, the maximum gas leakage amount of the valve workpiece 6 to be detected is 0.1SLPM, that is, the leakage alarm limit value is set to be 0.1 as the upper limit, and when the gas leakage amount of the valve workpiece 6 to be detected exceeds 0.1SLPM, the controller 42 outputs a signal to the alarm buzzer to start an alarm, so that the quick identification is facilitated, and the efficiency is improved for the gas tightness detection.
The technical contents not described in detail in the present application are all known technologies.
Claims (5)
1. The valve air tightness detection device is characterized by comprising an air station, a negative pressure generator, a gas mass flowmeter, a test bench and pipelines for connecting all the parts; the gas station provides a compressed gas source for the negative pressure generator, the inlet P of the negative pressure generator is used as a gas inlet, the inlet V of the negative pressure generator is a gas suction port, the gas suction port is communicated with the outlet of the gas mass flow meter through a pipeline, the inlet of the gas mass flow meter is hermetically connected with the port of a valve workpiece to be tested through a pipeline, and the test bench is used for fixing the valve workpiece to be tested.
2. The valve airtightness detection device according to claim 1, wherein an air source triple piece is arranged between the air station and the negative pressure generator, and comprises a pressure reducing valve, a filter and an oil mist generator, an inlet of the pressure reducing valve is communicated with an air supply port of the air station, an outlet of the pressure reducing valve is communicated with an inlet of the filter, an outlet of the filter is communicated with an inlet of the oil mist generator, and an outlet of the oil mist generator is communicated with an inlet P of the negative pressure generator.
3. The valve airtightness detection device according to claim 1, wherein a test fixture is mounted on the test bench, and the test fixture is used for fixing a valve workpiece to be detected.
4. The valve airtightness detection apparatus according to claim 1, wherein the gas mass flow meter is a digital display type flowmeter, the digital display type flowmeter is electrically connected to the controller, and a power supply end of the controller is externally connected to a power supply.
5. The valve airtightness detection apparatus according to claim 4, wherein an alarm buzzer is provided on the controller of the digital display type flowmeter, and a leakage alarm limit value can be set by the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220922720.3U CN217276753U (en) | 2022-04-20 | 2022-04-20 | Valve air tightness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220922720.3U CN217276753U (en) | 2022-04-20 | 2022-04-20 | Valve air tightness detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217276753U true CN217276753U (en) | 2022-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220922720.3U Active CN217276753U (en) | 2022-04-20 | 2022-04-20 | Valve air tightness detection device |
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| Country | Link |
|---|---|
| CN (1) | CN217276753U (en) |
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2022
- 2022-04-20 CN CN202220922720.3U patent/CN217276753U/en active Active
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