CN117990296A - Pressure leakage detection device - Google Patents
Pressure leakage detection device Download PDFInfo
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- CN117990296A CN117990296A CN202311139774.8A CN202311139774A CN117990296A CN 117990296 A CN117990296 A CN 117990296A CN 202311139774 A CN202311139774 A CN 202311139774A CN 117990296 A CN117990296 A CN 117990296A
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- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 111
- 238000004891 communication Methods 0.000 claims description 33
- 238000007789 sealing Methods 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000009659 non-destructive testing Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a pressure leakage detection device. The pressure leakage detection device comprises a standard chamber, a test chamber, a first air supply device, a second air supply device, an intercommunication device and a differential pressure sensor. The standard chamber is used for accommodating a standard component, and the test chamber is used for accommodating a component to be tested. The first gas supply device and the second gas supply device are connected with the standard chamber and the test chamber, and are used for introducing gases with different temperature values and pressure values into the standard chamber and the test chamber in different time periods. The intercommunication device is connected with the standard chamber, the internal space of the standard component, the test chamber and the internal space of the component to be tested. The differential pressure sensor is connected with the inner space and is used for measuring a pressure difference value between the inner space and the outer space.
Description
Technical Field
The present invention relates to a detection apparatus, and more particularly, to a pressure leak detection apparatus.
Background
The existing pressure leakage detection equipment tests the tested product in a positive pressure or negative pressure application mode, so that whether the tested product meets the required requirement is judged according to the pressure difference change. However, existing pressure leak detection apparatus do not take into account the test environment where temperature requirements coexist with pressure requirements.
Accordingly, the present inventors considered that the above-mentioned drawbacks could be improved, and have intensively studied and combined with the application of scientific principles, and finally have proposed an invention which is reasonable in design and effectively improves the above-mentioned drawbacks.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a pressure leakage detecting apparatus that can effectively improve defects that may occur in the existing pressure leakage detecting apparatus.
The embodiment of the invention discloses pressure leakage detection equipment, which comprises the following components: a standard chamber for setting a standard component; a testing chamber for setting a piece to be tested; the first gas supply device is connected with the standard chamber and the test chamber and is used for supplying a first gas to the standard chamber and the test chamber, wherein the first gas has a first temperature value and a first pressure value; a second gas supply device connected to the standard chamber and the test chamber for supplying a second gas to the standard chamber and the test chamber, the second gas having a second temperature value and a second pressure value, the first temperature value being different from the second temperature value, the first pressure value being different from the second pressure value; the intercommunication device is connected with the standard chamber, an inner space of the standard component, the test chamber and an inner space of the component to be tested; and a differential pressure sensor connected to the internal space of the standard component and the internal space of the component to be measured for measuring a pressure difference between the internal space of the standard component and the internal space of the component to be measured; the first gas supply device can be used for introducing the first gas into the standard chamber, the inner space of the standard component, the test chamber and the inner space of the component to be tested through the intercommunication device so that the standard chamber, the inner space of the standard component, the test chamber and the inner space of the component to be tested have the first temperature value and the first pressure value; when the standard chamber, the internal space of the standard component, the test chamber and the internal space of the to-be-tested component have the first temperature value and the first pressure value, the second gas supply device supplies the second gas to the standard chamber and the test chamber so that the standard chamber and the test chamber have the second temperature value and the second pressure value; wherein the differential pressure sensor measures the pressure differential when the standard chamber and the test chamber have the second temperature value and the second pressure value.
According to one embodiment of the present invention, the pressure leakage detecting apparatus includes a first control valve, and the first control valve is connected to the internal space of the standard component and the internal space of the component to be detected; when the first control valve is opened, the internal space of the standard component and the internal space of the to-be-tested component can be exhausted through the first control valve.
According to one embodiment of the present invention, the communicating means includes a second control valve connecting the standard chamber and the test chamber for connecting or disconnecting the standard chamber and the test chamber.
According to one embodiment of the present invention, the interworking device includes a third control valve, and the third control valve is connected to the standard chamber and the test chamber through the second control valve; when the second control valve is located at the communication position and the third control valve is located at the exhaust position, the standard chamber and the test chamber can be exhausted through the third control valve.
According to one embodiment of the present invention, the communicating device includes a fourth control valve, and the fourth control valve is connected to the standard chamber and the chamber to be tested through the second control valve and the third control valve; when the second control valve, the third control valve and the fourth control valve are all positioned at the communication position, the fourth control valve can be used for leading the first gas into the inner space of the standard component and the inner space of the component to be tested through the second control valve and the third control valve.
According to one embodiment of the present invention, the pressure leakage detecting apparatus further comprises a temperature detector and a pressure detector, wherein the temperature detector is used for detecting temperature values of the standard chamber and the test chamber, and the pressure detector is used for detecting pressure values of the standard chamber and the test chamber.
According to one embodiment of the present invention, the pressure leakage detecting apparatus further includes two fifth control valves, the first gas supply device is connected to the standard chamber and the test chamber through the two fifth control valves, respectively, and the second gas supply device is connected to the standard chamber and the test chamber through the two fifth control valves, respectively, and the two fifth control valves are used for connecting or disconnecting the first gas and the second gas.
According to one embodiment of the present invention, the first air supply device or the second air supply device includes: a compressor for compressing air and converting it into compressed air, so that the compressed air has the first pressure value or the second pressure value; the dryer is connected with the compressor and used for drying the compressed air; the air storage tank is connected with the dryer and used for storing the compressed air; and a temperature controller connected to the air storage tank for controlling the compressed air at the first temperature value or the second temperature value to generate the first gas or the second gas.
According to one embodiment of the present invention, when the first gas supply device supplies the first gas to the standard chamber, the internal space of the standard component, the test chamber and the internal space of the workpiece through the communicating device, the first gas supply device increases the first temperature value from an initial temperature value and increases the first pressure value from an initial pressure value to the first pressure value.
According to one embodiment of the present invention, the part to be tested includes: a body forming the internal space and having an opening communicating with the internal space; a sealing cover plate for closing the opening; the air inlet connector is arranged on the sealing cover plate and is connected with the inner space and the intercommunication device, and the first gas enters the inner space through the air inlet connector; and the pressure measuring connector is arranged on the sealing cover plate and is connected with the inner space and the differential pressure sensor, and the differential pressure sensor is used for measuring the pressure difference value through the pressure measuring connector.
According to one embodiment of the invention, the first temperature value is higher than the second temperature value and the first pressure value is lower than the second pressure value.
In summary, the pressure leakage detecting apparatus disclosed in the embodiments of the present invention belongs to nondestructive detection (nondestructive testing, NDT), and simulates different environmental conditions with temperature requirements and pressure requirements through the cooperation of the first air supply device, the second air supply device and the communication device, so that the to-be-detected member and the standard member can perform pressure ratio comparison test at different temperatures.
For a further understanding of the nature and the technical aspects of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings, which are included to illustrate and not to limit the scope of the invention.
Drawings
Fig. 1 is a schematic diagram of step S110 of the pressure leakage detecting apparatus according to the embodiment of the present invention.
Fig. 2 is an enlarged schematic view of the standard chamber, standard component, test chamber and part under test of fig. 1.
Fig. 3 is an enlarged schematic view of the first air supply device and the second air supply device of fig. 1.
Fig. 4 is an enlarged schematic view of the interworking device of fig. 1.
Fig. 5 is a schematic diagram (one) of step S120 of the pressure leakage detecting apparatus according to the embodiment of the invention.
Fig. 6 is a schematic diagram (two) of step S120 of the pressure leakage detecting apparatus according to the embodiment of the invention.
Fig. 7 is a schematic diagram of step S130 (one) of the pressure leakage detecting apparatus according to the embodiment of the invention.
Fig. 8 is a schematic diagram (two) of step S130 of the pressure leakage detecting apparatus according to the embodiment of the invention.
Fig. 9 is a schematic diagram of step S140 of the pressure leakage detecting apparatus according to the embodiment of the present invention in operation.
The reference numerals are as follows:
100: pressure leakage detection device
1: Standard chamber
2: Test chamber
3: First air supply device
31: First compressor
32: First dryer
33: First air storage tank
34: Heater
4: Second air supply device
41: Second compressor
42: Second dryer
43: Second air storage tank
44: Condenser
5: Fifth control valve
6: Intercommunication device
60: Control valve group
61: Second control valve
611: Communication position
612: Open position
62: Third control valve
621: Exhaust location
622: Open position
623: Communication position
63: Fourth control valve
631: Communication position
632: Open position
64: Temperature detector
65: Pressure detector
7: First control valve
8: Differential pressure sensor
S: standard component
S0: interior space
S1: body
S11: perforating the hole
S2: sealing cover plate
S3: air inlet joint
S4: pressure measuring joint
S5: sealant layer
T: workpiece to be measured
T0: interior space
T1: body
T11: perforating the hole
T2: sealing cover plate
T3: air inlet joint
T4: pressure measuring joint
T5: gasket ring
G1: first gas
And G2: second gas
S110 to S140: step (a)
Detailed Description
The following is a description of the embodiments of the disclosed "pressure leak detection apparatus" by specific examples, and those skilled in the art will appreciate the advantages and effects of the present invention from the disclosure herein. The invention is capable of other and different embodiments and its several details are capable of modifications and various other uses and applications, all of which are obvious from the description, without departing from the spirit of the invention. The drawings of the present invention are merely schematic illustrations, and are not intended to be drawn to actual dimensions. The following embodiments will further illustrate the related art content of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
It will be understood that, although the terms "first," "second," "third," etc. may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are used primarily to distinguish one element from another element or signal from another signal. In addition, the term "or" as used herein shall include any one or combination of more of the associated listed items as the case may be.
Please refer to fig. 1 to 9, which are an embodiment of the present invention. As shown in fig. 1 to 4, the present embodiment discloses a pressure leakage detecting apparatus 100, which can be used to simulate different environmental conditions with temperature requirements and pressure requirements, so that a to-be-detected member T can perform a pressure ratio comparison test with a standard member S, and effectively reduce the test time required by the to-be-detected member T.
Further, the to-be-tested device T includes at least one body T1 (two in this embodiment), a sealing cover T2, an air inlet connector T3, and a pressure measuring connector T4. Wherein, two of the bodies T1 are assembled to each other to enclose an inner space T0, and one of the bodies T1 has an opening T11 communicating with the inner space T0. Furthermore, the sealing cover plate T2 closes the opening T11, and the air inlet connector T3 and the pressure measuring connector T4 are mounted on the sealing cover plate T2 and are communicated with the internal space T0, so that the internal space T0 can be communicated with the outside through the air inlet connector T3 and the pressure measuring connector T4.
Furthermore, the internal space S0 of the standard component S has a volume equal to that of the internal space T0, and the standard component S is preferably formed with a substantially similar structure to the test component T, so as to reduce the generation of variables. That is, the standard component S also includes at least one body S1 (e.g., two) in the present embodiment, a sealing cover S2, an air inlet connector S3 and a pressure measuring connector S4. Wherein, two bodies S1 are assembled to each other to enclose the inner space S0, and one of the bodies S1, T1 has an opening S11 communicating with the inner space S0. Furthermore, the sealing cover plate S2 closes the opening S11, and the air inlet connector S3 and the pressure measuring connector S4 are installed on the sealing cover plate S2 to be communicated with the internal space S0, so that the internal space S0 can be communicated with the outside through the air inlet connector S3 and the pressure measuring connector S4.
Further, the standard S and the test piece T can be formed with only the following structural differences in the present embodiment: the standard component S is provided with a sealant layer S5 for sealing the junction of the two main bodies S1, so that the internal space S0 of the standard component S can be completely isolated from the external environment; the to-be-tested piece T is provided with a gasket T5 clamped between the two bodies T1, so that the isolation degree between the internal space T0 and the external environment is influenced by the gasket T5. That is, the sealing degree achieved by the gasket T5 is the target to be tested in the present embodiment under the different environmental conditions simulated by the pressure leakage detecting apparatus 100.
The pressure leakage detecting apparatus 100 in the present embodiment includes a standard chamber 1, a testing chamber 2, a first air supply device 3, a second air supply device 4, two fifth control valves 5, an interconnection device 6, a first control valve 7 and a differential pressure sensor 8, but the invention is not limited thereto. For example, in other embodiments of the present invention, not shown, the fifth control valve 5 and the first control valve 7 may be omitted or replaced by other components according to design requirements.
The standard chamber 1 is used for setting the standard component S, and the standard component S can pass through the sealant layer S5 so that the gas in the standard chamber 1 cannot leak to the internal space S0 of the standard component S; that is, the inner space S0 of the standard S is completely sealed, and the pressure value thereof is independent (i.e., not linked) from the pressure value of the standard chamber 1.
Furthermore, the test chamber 2 is configured for the to-be-tested piece T, and the test chamber 2 and the internal space T0 of the to-be-tested piece T are isolated from each other only by the gasket T5, so that the sealing degree of the gasket T5 determines whether the pressure value of the test chamber 2 and the pressure value of the internal space T0 of the to-be-tested piece T will affect each other. In addition, the standard chamber 1 and the test chamber 2 have the same internal volume in the present embodiment, and both have the functions of heat insulation and high pressure resistance.
The first gas supply device 3 is connected to the standard chamber 1 and the test chamber 2 for supplying a first gas G1 to the standard chamber 1 and the test chamber 2, and the first gas G1 has a first temperature (e.g. 52 degrees celsius) and a first pressure (e.g. 15.93 psi). In this embodiment, the first air supply device 3 includes a first compressor 31, a first dryer 32 connected to the first compressor 31, a first air storage tank 33 connected to the first dryer 32, and a heater 34 connected to the first air storage tank 33.
Further, the first compressor 31 is configured to draw and pressurize gas from an external environment (e.g., the external environment has a gas temperature of 25 ℃ and a pressure of 14.7 psi); for example, the first compressor 31 is configured to compress air and convert the air into compressed air, such that the compressed air has the first pressure value. The first dryer 32 can be used to filter the moisture of the gas extracted by the first compressor 31 (e.g. to reduce the humidity of the compressed air to below 35%), the first air storage tank 33 is used to store the gas filtered by the first dryer 32 and has the first pressure value, and the heater 34 is used to maintain the first gas G1 output from the first gas supply device 3 to the standard chamber 1 and the test chamber 2 at the first temperature value.
Furthermore, the second gas supply device 4 is connected to the standard chamber 1 and the test chamber 2, and is used for introducing a second gas G2 into the standard chamber 1 and the test chamber 2. The second gas G2 has a second temperature value (e.g., 25 degrees celsius) and a second pressure value (e.g., 17.35 psi), the first temperature value is higher than the second temperature value, and the first pressure value is lower than the second pressure value. In this embodiment, the second air supply device 4 includes a second compressor 41, a second dryer 42 connected to the second compressor 41, a second air storage tank 43 connected to the second dryer 42, and a condenser 44 connected to the second air storage tank 43.
Further, the second compressor 41 is configured to draw and pressurize gas from the external environment (e.g., the external environment has a gas temperature of 25 ℃ and a pressure of 14.7 psi); for example, the second compressor 41 is configured to compress air and convert the air into compressed air, such that the compressed air has the second pressure value. The second dryer 42 can be used to filter the moisture of the gas extracted by the second compressor 41 (e.g. to reduce the humidity of the compressed air to below 35%), the second air storage tank 43 is used to store the gas filtered by the second dryer 42 and provided with the second pressure value, and the condenser 44 is used to maintain the second gas G2 output from the second gas supply device 4 to the standard chamber 1 and the test chamber 2 at the second temperature value.
It should be noted that, in this embodiment, both the heater 34 and the condenser 44 may be referred to as a temperature controller. Furthermore, in the present embodiment, the gas transfer and switching between the standard chamber 1 and the test chamber 2 compared to the first gas supply device 3 and the second gas supply device 4 are implemented by two fifth control valves 5, but the present invention is not limited thereto. Further, each of the standard chamber 1 and the test chamber 2 is connected to one of the fifth control valves 5, and each of the first air supply device 3 and the second air supply device 4 is connected to two of the fifth control valves 5, so that each of the standard chamber 1 and the test chamber 2 can be connected to or disconnected from the first air supply device 3 or the second air supply device 4 through the connected fifth control valve 5.
The intercommunication device 6 is connected to the standard chamber 1, the internal space S0 of the standard component S, the test chamber 2 and the internal space T0 of the component T to be tested. In the present embodiment, the communicating device 6 is connected to the air inlet joint S3 of the standard component S to communicate with the internal space S0, and the communicating device 6 is connected to the air inlet joint T3 of the test component T to communicate with the internal space T0.
The pressure leak detection apparatus 100 further includes a temperature detector 64 and a pressure detector 65. Wherein the temperature detector 64 can be used to detect the temperature values of the standard chamber 1 and the test chamber 2, and the pressure detector 65 can be used to detect the pressure values of the standard chamber 1 and the test chamber 2.
The communication device 6 includes a second control valve 61, a third control valve 62 and a fourth control valve 63, which are sequentially connected and matched with each other. Further, the second control valve 61 has a communication position 611 and a disconnection position 612. Wherein, as shown in fig. 1, when the second control valve 61 is located at the communication position 611, the standard chamber 1 and the test chamber 2 communicate with each other; as shown in fig. 9, when the second control valve 61 is in the open position 612, the standard chamber 1 and the test chamber 2 are isolated from each other.
Furthermore, the third control valve 62 has an exhaust position 621, an open position 622 and a communication position 623. Wherein, as shown in FIG. 1, when the third control valve 62 is in the exhaust position 621, the third control valve 62 is operable to allow the space or chamber connected thereto to communicate to the external environment; as shown in fig. 9, when the third control valve 62 is in the open position 622, the spaces or chambers respectively connected to the second control valve 61 and the fourth control valve 63 are isolated from each other; as shown in fig. 5, when the third control valve 62 is at the communication position 623, spaces or chambers respectively connected to the second control valve 61 and the fourth control valve 63 communicate with each other.
It should be noted that the second control valve 61 and the third control valve 62 can be collectively referred to as a control valve set 60 in this embodiment, and the communication device 6 can be switched by the components thereof (for example, the second control valve 61 is located at the communication position 611 and the third control valve 62 is located at the exhaust position 621), so that the third control valve 60 is connected to the standard chamber 1 and the test chamber 2 for exhausting the standard chamber 1 and the test chamber 2.
In addition, the fourth control valve 63 has a communication position 631 and a disconnection position 632. Wherein, as shown in fig. 1, when the fourth control valve 63 is located at the communication position 631, the internal space S0 and the internal space T0 communicate with each other; as shown in fig. 9, when the fourth control valve 63 is located at the off position 632, the internal space S0 and the internal space T0 are isolated from each other.
That is, the communication device 6 can connect the fourth control valve 63 to the internal space S0 of the standard component S and the internal space T0 of the component T to be tested by switching the components thereof (for example, the second control valve 61 is located at the communication position 611, the third control valve 62 is located at the communication position 623, and the fourth control valve 63 is located at the communication position 631), and the fourth control valve 63 is used for introducing the first gas G1 into the internal space S0 and the internal space T0 through the third control valve 60 and the second control valve 61.
The differential pressure sensor 8 is connected to the internal space S0 of the standard component S and the internal space T0 of the to-be-measured component T, and is configured to measure a pressure difference between the internal space S0 and the internal space T0. The first control valve 7 is connected to an external environment and connected to the internal space S0 of the standard component S and the internal space T0 of the test component T, so as to exhaust the internal space S0 and the internal space T0.
In this embodiment, one end of the differential pressure sensor 8 and the first control valve 7 are connected to the pressure measuring joint T4 of the test piece T, and the other end of the differential pressure sensor 8 and the first control valve 7 is connected to the pressure measuring joint S4 of the standard piece S. Accordingly, as shown in fig. 1, when the first control valve 7 is opened, the internal space S0 and the internal space T0 can be exhausted toward the external environment through the first control valve 7. As shown in fig. 9, when the first control valve 7 is closed, the internal space S0 and the internal space T0 cannot be exhausted to the outside, so that the differential pressure sensor 8 can perform the measurement of the pressure difference.
In summary, the above is a description of the structure of the pressure leakage detecting apparatus 100 in the present embodiment, and one possible operation of the pressure leakage detecting apparatus 100 is described below, which sequentially includes steps S110 to S140, but the invention is not limited thereto. It should be noted that any numerical values in the present embodiment are for convenience of explanation only, so that a plurality of numerical values can be adjusted and changed according to the requirement in practical application.
Step S110: as shown in fig. 1, which is an initial configuration of the pressure leak detection apparatus 100. Wherein the standard chamber 1 and the test chamber 2 are disconnected from communication with the first air supply device 3 and the second air supply device 4 by the fifth control valve 5 corresponding to each; in the communication device 6, the second control valve 61 is located at the communication position 611 and the third control valve 62 is located at the exhaust position 621, so that the standard chamber 1 and the test chamber 2 are communicated with the external environment; the first control valve 7 is opened and the fourth control valve 63 is located at the communication position 631 so that the internal space S0 and the internal space T0 can communicate with the external environment.
Step S120: as shown in fig. 5, the standard chamber 1 and the test chamber 2 are respectively switched by the fifth control valve 5 corresponding to each other to be communicated with only the first gas supply device 3, so that the first gas supply device 3 can introduce the first gas G1 into the standard chamber 1 and the test chamber 2.
Further, the second control valve 61 is located at the communication position 611, the third control valve 62 is located at the communication position 623, and the fourth control valve 63 is located at the communication position 631, and the first control valve 7 is opened so that the first gas G1 can be introduced into the internal space S0 and the internal space T0 via the standard chamber 1 and the test chamber 2, and so that the gas inside the pressure leak detection apparatus 100 existing in the initial configuration state will be discharged to the external environment via the first control valve 7.
Next, as shown in fig. 6, when the temperature detector 64 detects that the standard chamber 1 and the test chamber 2 have the first temperature value, the first control valve 7 is closed so that the standard chamber 1, the internal space S0, the test chamber 2 and the internal space T0 can be isolated from the external environment, thereby being filled with only the first gas G1 to have the first temperature value and the first pressure value.
That is, the first gas supply device 3 can supply the first gas G1 to the standard chamber 1, the internal space S0 of the standard member S, the test chamber 2, and the internal space T0 of the member to be tested T through the communicating device 6 so that the standard chamber 1, the internal space S0 of the standard member S, the test chamber 2, and the internal space T0 of the member to be tested T have the first temperature value and the first pressure value.
In step S120 of the present embodiment, the standard chamber 1, the inner space S0 of the standard component S, the test chamber 2 and the inner space T0 of the test component T are raised from an initial temperature value (e.g. 25 degrees celsius) to the first temperature value (e.g. 52 degrees celsius) and from an initial pressure value (e.g. 14.73 psi) to the first pressure value (e.g. 15.93 psi).
Step S130: as shown in fig. 7, the standard chamber 1 and the test chamber 2 are respectively switched by the fifth control valve 5 corresponding to each other to be communicated with only the second gas supply device 4, so that the second gas supply device 4 can introduce the second gas G2 into the standard chamber 1 and the test chamber 2. Furthermore, the second control valve 61 is located at the communication position 611, the third control valve 62 is located at the exhaust position 621, and the fourth control valve 63 is located at the communication position 631, and the first control valve 7 is closed, so that the first gas G1 in the standard chamber 1 and the test chamber 2 can be exhausted to the external environment, and the first gas G1 is kept in the internal space S0 and the internal space T0.
Next, as shown in fig. 8, when the temperature detector 64 detects that the standard chamber 1 and the test chamber 2 have the second temperature value, the third control valve 62 is switched to the off position 622, and the standard chamber 1 and the test chamber 2 are continuously supplied with the second gas G2 by the second gas supply device 4 until the standard chamber 1 and the test chamber 2 have the second pressure value.
That is, when the standard chamber 1, the internal space S0 of the standard member S, the test chamber 2, and the internal space T0 of the member to be tested T have the first temperature value and the first pressure value, the second gas supply device 4 supplies the second gas G2 to the standard chamber 1 and the test chamber 2 so that the standard chamber 1 and the test chamber 2 have the second temperature value and the second pressure value.
In step S130 of the present embodiment, the standard chamber 1 and the test chamber 2 are lowered from the first temperature value (e.g., 52 ℃ C.) to the second temperature value (e.g., 25 ℃ C.) and raised from the first pressure value (e.g., 15.93 psi) to the second pressure value (e.g., 17.35 psi); the inner space S0 and the inner space T0 are communicated with each other and are filled with the first gas G1, which should be maintained at the first temperature value (e.g., 52 degrees celsius) and the first pressure value (e.g., 15.93 psi).
Step S140: as shown in fig. 9, the standard chamber 1 and the test chamber 2 are each disconnected from communication with the first air supply device 3 and the second air supply device 4 by the corresponding fifth control valve 5. Furthermore, the second control valve 61 is located at the off position 612, the third control valve 62 is located at the off position 622, and the fourth control valve 63 is located at the off position 632, and the first control valve 7 is closed such that the standard chamber 1, the internal space S0, the test chamber 2, and the internal space T0 are independent and not communicated with each other, thereby measuring the pressure difference between the internal space S0 and the internal space T0 by the differential pressure sensor 8.
That is, the differential pressure sensor 8 measures the pressure difference when the standard chamber 1 and the test chamber 2 have the second temperature value and the second pressure value. The more the pressure difference measured by the differential pressure sensor 8 approaches zero, the better the insulation effect between the internal space T0 of the test piece T and the test chamber 2 is, which means that the lower the pressure leakage degree of the test piece T is.
[ Technical Effect of embodiments of the invention ]
In summary, the pressure leakage detecting apparatus disclosed in the embodiments of the present invention belongs to nondestructive detection (nondestructive testing, NDT), and simulates different environmental conditions with temperature requirements and pressure requirements through the cooperation of the first air supply device, the second air supply device and the communication device, so that the to-be-detected member can perform pressure ratio comparison test with the standard member, and the test time required by the to-be-detected member is effectively reduced.
The foregoing disclosure is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, as all changes which come within the meaning and range of equivalency of the description and drawings are therefore intended to be embraced therein.
Claims (11)
1. A pressure leak detection apparatus, comprising:
a standard chamber for setting a standard component;
A testing chamber for setting a piece to be tested;
The first gas supply device is connected with the standard chamber and the test chamber and is used for supplying a first gas to the standard chamber and the test chamber, wherein the first gas has a first temperature value and a first pressure value;
A second gas supply device connected to the standard chamber and the test chamber for supplying a second gas to the standard chamber and the test chamber, the second gas having a second temperature value and a second pressure value, the first temperature value being different from the second temperature value, the first pressure value being different from the second pressure value;
the intercommunication device is connected with the standard chamber, an inner space of the standard component, the test chamber and an inner space of the component to be tested; and
A differential pressure sensor connected to the internal space of the standard component and the internal space of the component to be measured for measuring a pressure difference between the internal space of the standard component and the internal space of the component to be measured;
The first gas supply device can be used for introducing the first gas into the standard chamber, the inner space of the standard component, the test chamber and the inner space of the component to be tested through the intercommunication device so that the standard chamber, the inner space of the standard component, the test chamber and the inner space of the component to be tested have the first temperature value and the first pressure value;
when the standard chamber, the internal space of the standard component, the test chamber and the internal space of the to-be-tested component have the first temperature value and the first pressure value, the second gas supply device supplies the second gas to the standard chamber and the test chamber so that the standard chamber and the test chamber have the second temperature value and the second pressure value;
wherein the differential pressure sensor measures the pressure differential when the standard chamber and the test chamber have the second temperature value and the second pressure value.
2. The pressure leak detection apparatus as defined in claim 1, wherein the pressure leak detection apparatus includes a first control valve, and the first control valve is connected to the internal space of the standard component and the internal space of the component to be detected; when the first control valve is opened, the internal space of the standard component and the internal space of the to-be-tested component can be exhausted through the first control valve.
3. The pressure leak detection apparatus as defined in claim 1, wherein the communicating means includes a second control valve connecting the standard chamber and the test chamber for connecting or disconnecting the standard chamber and the test chamber.
4. A pressure leak detection apparatus as defined in claim 3, wherein the communication means includes a third control valve, and wherein the third control valve is connected to the standard chamber and the test chamber through the second control valve; when the second control valve is located at the communication position and the third control valve is located at the exhaust position, the standard chamber and the test chamber can be exhausted through the third control valve.
5. The pressure leak detection apparatus as defined in claim 4, wherein the communicating means includes a fourth control valve, and the fourth control valve connects the standard chamber and the chamber to be detected through the second control valve and the third control valve; when the second control valve, the third control valve and the fourth control valve are all positioned at the communication position, the fourth control valve can be used for leading the first gas into the inner space of the standard component and the inner space of the component to be tested through the second control valve and the third control valve.
6. The pressure leak detection apparatus as defined in claim 1, further comprising a temperature detector for detecting temperature values of the standard chamber and the test chamber and a pressure detector for detecting pressure values of the standard chamber and the test chamber.
7. The pressure leakage detecting apparatus according to claim 1, further comprising two fifth control valves, wherein the first gas supply device is connected to the standard chamber and the test chamber through the two fifth control valves, respectively, and the second gas supply device is connected to the standard chamber and the test chamber through the two fifth control valves, respectively, and the two fifth control valves are used to connect or disconnect the first gas and the second gas.
8. The pressure leak detection apparatus as defined in claim 1, wherein the first air supply means or the second air supply means comprises:
A compressor for compressing air and converting it into compressed air, so that the compressed air has the first pressure value or the second pressure value;
The dryer is connected with the compressor and used for drying the compressed air;
The air storage tank is connected with the dryer and used for storing the compressed air; and
And the temperature controller is connected with the air storage tank and used for controlling the compressed air to be at the first temperature value or the second temperature value so as to generate the first gas or the second gas.
9. The pressure leakage detecting apparatus according to claim 1, wherein when the first gas supply means supplies the first gas to the standard chamber, the internal space of the standard member, the test chamber, and the internal space of the member to be measured through the communicating means, the standard chamber, the internal space of the standard member, the test chamber, and the internal space of the member to be measured are raised from an initial temperature value to the first temperature value and from an initial pressure value to the first pressure value.
10. The pressure leak detection apparatus as defined in claim 1, wherein the member to be tested comprises:
A body forming the internal space and having an opening communicating with the internal space;
a sealing cover plate for closing the opening;
The air inlet connector is arranged on the sealing cover plate and is connected with the inner space and the intercommunication device, and the first gas enters the inner space through the air inlet connector; and
The pressure measuring connector is arranged on the sealing cover plate and is connected with the inner space and the differential pressure sensor, and the differential pressure sensor is used for measuring the pressure difference value through the pressure measuring connector.
11. The pressure leak detection apparatus as defined in claim 1, wherein the first temperature value is higher than the second temperature value and the first pressure value is lower than the second pressure value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW111142330A TWI833424B (en) | 2022-11-07 | 2022-11-07 | Detection apparatus for pressure leakage |
| TW111142330 | 2022-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117990296A true CN117990296A (en) | 2024-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311139774.8A Pending CN117990296A (en) | 2022-11-07 | 2023-09-05 | Pressure leakage detection device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN117990296A (en) |
| TW (1) | TWI833424B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11118657A (en) * | 1997-10-21 | 1999-04-30 | Cosmo Keiki:Kk | Drift correction value calculator and leakage detector equipped with calculator |
| JP4994494B2 (en) * | 2010-12-14 | 2012-08-08 | 株式会社エイムテック | Differential pressure measurement method and apparatus |
| JP5664521B2 (en) * | 2011-10-26 | 2015-02-04 | トヨタ自動車株式会社 | Leak test method and leak test apparatus |
| US10816434B2 (en) * | 2015-12-14 | 2020-10-27 | Fukuda Co., Ltd. | Apparatus and method for leak testing |
| JP2018179840A (en) * | 2017-04-18 | 2018-11-15 | 株式会社コスモ計器 | Air leak tester and air leak test method |
| CN109556809B (en) * | 2019-01-14 | 2020-06-30 | 中国工程物理研究院机械制造工艺研究所 | Nondestructive leak detection method and device based on differential pressure principle |
-
2022
- 2022-11-07 TW TW111142330A patent/TWI833424B/en active
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2023
- 2023-09-05 CN CN202311139774.8A patent/CN117990296A/en active Pending
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| Publication number | Publication date |
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| TW202419837A (en) | 2024-05-16 |
| TWI833424B (en) | 2024-02-21 |
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