CN220893536U - Leakage amount testing device for piston type gas flow standard device - Google Patents
Leakage amount testing device for piston type gas flow standard device Download PDFInfo
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- CN220893536U CN220893536U CN202322592300.0U CN202322592300U CN220893536U CN 220893536 U CN220893536 U CN 220893536U CN 202322592300 U CN202322592300 U CN 202322592300U CN 220893536 U CN220893536 U CN 220893536U
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- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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Abstract
The utility model relates to the technical field of testing devices, and discloses a leakage amount testing device for a piston type gas flow standard device, which comprises a cylinder body, wherein a piston is arranged in the cylinder body, a proximity switch is arranged on the cylinder body near two ends, two ends of the cylinder body are respectively connected with an air outlet pipe and a main pipeline, the main pipeline is simultaneously connected and communicated with a pressure-stabilizing air source, and a precise pressure regulator and a flow regulating valve are arranged on the main pipeline from the pressure-stabilizing air source to the cylinder body. This leakage quantity testing arrangement carries out pressure's regulation through accurate pressure regulator, can ensure test pressure's stability, utilizes the flow control valve to carry out the regulation of flow simultaneously, not only adjusts fastly, and the flow is more steady moreover, is favorable to guaranteeing the accuracy of test result.
Description
Technical Field
The utility model relates to the technical field of testing devices, in particular to a leakage amount testing device for a piston type gas flow standard device.
Background
The gap passive piston gas flow standard device is a novel gas flow standard device, the quantity of the gap passive piston gas flow standard device needs to be calibrated regularly, when the gap passive piston gas flow standard device is calibrated, the leakage quantity between a piston and a cylinder body needs to be tested, the leakage quantity is tested currently by detecting the time of the piston passing through two detection switches under the actual leakage flow, and the leakage quantity of the piston is calculated.
Disclosure of utility model
(One) solving the technical problems
Aiming at the defects of the prior art, the utility model provides a leakage amount testing device for a piston type gas flow standard device, so as to solve the problems in the background art.
(II) technical scheme
In order to solve the problems, the utility model provides the following technical scheme:
A leak quantity testing arrangement for piston type gas flow standard device, including the cylinder body, be equipped with the piston in the cylinder body, the proximity switch is all installed to the position of leaning on both ends on the cylinder body, and the both ends of cylinder body are connected with outlet duct and main way pipe respectively, and main way pipe is connected the intercommunication with the steady voltage air supply simultaneously, installs accurate pressure regulator and flow control valve on the main way pipe of steady voltage air supply to cylinder body.
Preferably, the connection position of the main pipeline and the cylinder body is connected with a branch pipeline in parallel through a tee joint, the branch pipeline is simultaneously connected to an air outlet pipe, and a branch valve is arranged on the branch pipeline.
Preferably, the cylinder is arranged vertically.
(III) beneficial effects
Compared with the prior art, the utility model provides a leakage amount testing device for a piston type gas flow standard device, which has the following beneficial effects:
1. This leakage quantity testing arrangement carries out pressure's regulation through accurate pressure regulator, can ensure test pressure's stability, utilizes the flow control valve to carry out the regulation of flow simultaneously, not only adjusts fastly, and the flow is more steady moreover, is favorable to guaranteeing the accuracy of test result.
2. According to the leakage quantity testing device, the leakage test is carried out under two postures of the cylinder body, and the testing efficiency can be greatly improved by utilizing the positive and negative difference method.
Drawings
FIG. 1 is a schematic diagram of a forward test of the present utility model;
FIG. 2 is a schematic diagram of a reverse test of the present utility model.
In the figure: 1. a regulated air source; 2. a precision pressure regulator; 3. a flow regulating valve; 4. a cylinder; 5, a piston; 6. a proximity switch; 7. a main pipe; 8. an air outlet pipe; 9. a branch pipe; 10. a bypass valve.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Referring to fig. 1 and 2, a leakage amount testing device for a piston type gas flow standard device comprises a cylinder body 4 and a piston 5 which is positioned in the cylinder body 4 and is in contact and seal with the inner wall of the cylinder body 4, wherein the cylinder body 4 is vertically arranged, a proximity switch 6 is arranged on the cylinder body 4 near two ends, the proximity switch 6 is a non-photoelectric switch, an ultrasonic proximity switch is used in the embodiment, one end of the cylinder body 4 is connected with an air outlet pipe 8, and the other end is connected and communicated with a main path pipe 7 and a branch path pipe 9 through a tee joint;
One end of a main pipeline 7 far away from the cylinder body 4 is connected and communicated with the pressure-stabilizing air source 1, a precise pressure regulator 2 and a flow regulating valve 3 are arranged on the main pipeline 7 from the pressure-stabilizing air source 1 to the cylinder body 4, one end of a branch pipeline 9 far away from the cylinder body 4 is connected and communicated with an air outlet pipe 8, and a branch valve 10 is arranged on the branch pipeline 9.
When in testing, the regulated air source 1 supplies air, the outlet pressure is set at the position of the precise pressure regulator 2 to be more than 0.2MPa, the minimum flow rate from the flow regulating valve 3 to the standard device, namely the cylinder body 4 is recorded as q v, the air enters the cylinder body 4 through the main path pipe 7, the pressure in the cylinder body 4 below the piston 5 is larger than the upper pressure because of continuous air input, the piston 5 is pushed to move upwards in the cylinder body 4, after the piston 5 is sensed by the proximity switch on the upper side of the cylinder body 4, the flow regulating valve 3 is closed to stop inputting the air, when the piston 5 moves to the proximity switch on the upper side from the lower side in the cylinder body 4, the piston 5 is sensed, at this time, the movement time of the piston can be obtained according to the front-back induction time difference, then the internal volume of the cylinder 4 can be obtained according to the internal diameter of the cylinder 4 and the front-back switch interval, the instantaneous flow can be obtained according to the time and the volume, the end part of the cylinder 4 at one side of the air outlet pipe 8 is set to be upward, the instantaneous flow obtained at this time is recorded as q VD, the flow of the piston in the forward direction is q v＝qVD+qVL, the bypass valve 10 is opened to close the flow regulating valve 3, the gas in the cylinder 4 is deflated, the bypass valve 10 is closed after deflation is completed, the cylinder 4 is inverted by 180 degrees, the measurement is carried out again, the flow of the piston in the reverse direction obtained at this time is q v＝qVR-qVL, q VL in the two modes is the leakage quantity, and the two modes can be knownThe actual leakage amount of the piston position can be obtained.
Claims (3)
1. A leak quantity testing arrangement for piston gas flow standard device, including cylinder body (4), be equipped with piston (5), its characterized in that in cylinder body (4): proximity switches (6) are arranged at positions close to two ends of the cylinder body (4), two ends of the cylinder body (4) are respectively connected with an air outlet pipe (8) and a main pipeline (7), the main pipeline (7) is simultaneously connected and communicated with a pressure-stabilizing air source (1), and a precise pressure regulator (2) and a flow regulating valve (3) are arranged on the main pipeline (7) from the pressure-stabilizing air source (1) to the cylinder body (4).
2. The leak testing apparatus for a piston type gas flow standard apparatus as defined in claim 1, wherein: the connecting position of the main pipeline (7) and the cylinder body (4) is connected with a branch pipeline (9) in parallel through a tee joint, the branch pipeline (9) is connected to an air outlet pipe (8) at the same time, and a branch valve (10) is arranged on the branch pipeline (9).
3. The leak testing apparatus for a piston type gas flow standard apparatus as defined in claim 1, wherein: the cylinder body (4) is vertically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322592300.0U CN220893536U (en) | 2023-09-22 | 2023-09-22 | Leakage amount testing device for piston type gas flow standard device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322592300.0U CN220893536U (en) | 2023-09-22 | 2023-09-22 | Leakage amount testing device for piston type gas flow standard device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220893536U true CN220893536U (en) | 2024-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322592300.0U Active CN220893536U (en) | 2023-09-22 | 2023-09-22 | Leakage amount testing device for piston type gas flow standard device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220893536U (en) |
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2023
- 2023-09-22 CN CN202322592300.0U patent/CN220893536U/en active Active
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