Mobile gas leakage detection device and use method thereof

Abstract

The invention belongs to the technical field of hypersonic speed special wind tunnel tests, and discloses a mobile gas leakage detection device and a use method thereof. Sliding universal wheels are fixed to a lower mounting plane of a support of the movable gas leakage detection device, a vertical lifting stand column is fixed to an upper mounting plane of the support, the height of the lifting stand column is controlled through a turbine worm reducer, the top end of the lifting stand column is connected with a transverse telescopic rod through a hinge, and a gas collecting hood is fixed to the front end of the transverse telescopic rod. A gas concentration sensor probe is mounted in the gas collecting hood; an inclined supporting rod is arranged between the lifting stand column and the transverse telescopic rod. The use method comprises the following steps: pushing the movable gas leakage detection device to a position near a detection position, supporting the inclined supporting rod, fixing the inclined supporting rod in the pin hole in the upper section of the lifting upright post through the positioning pin, and adjusting the lifting upright post, so that the gas collecting hood is arranged above the detection position and is fixed. The mobile gas leakage detection device and the use method thereof solve the problem of gas leakage detection in hypersonic wind tunnel test, and have practical engineering value.

Description

Technical Field

[0001] The present invention belongs to the technical field of hypersonic special wind tunnel test, and particularly relates to a mobile gas leakage detection device and a using method thereof. Background Art

[0002] Light gases such as hydrogen are commonly used in hypersonic special wind tunnel tests and usually exist in the test pipeline in a high-pressure form. Hypersonic special wind tunnel tests require frequent replacement of test devices and cleaning and inspection of test pipelines, which easily leads to the failure of the pipeline seal and the risk of test gas leakage. Moreover, due to the uncertain position of the leakage point, it is not suitable to install fixed gas leakage detection equipment; in addition, light gases such as hydrogen have a small gas density and quickly disperse upward after leakage, making it difficult to effectively monitor.

[0003] On the one hand, the leakage of light gases such as hydrogen makes the pressure in the test pipeline unable to reach the precise value required by the test, directly affecting the quality of test data; at the same time, once the leaked combustible gases such as hydrogen come into contact with heat sources or electric sparks in the test device, they are extremely likely to explode, causing casualties and damage to test facilities.

[0004] Currently, there is an urgent need to develop a mobile gas leakage detection device and a using method thereof. Summary of the Invention

[0005] One technical problem to be solved by the present invention is to provide a mobile gas leakage detection device, and another technical problem to be solved by the present invention is to provide a using method of the mobile gas leakage detection device to overcome the defects of the prior art.

[0006] The support of the mobile gas leakage detection device of the present invention has two horizontal mounting planes, the lower mounting plane is fixed with several sliding universal wheels, and the upper mounting plane is fixed with a vertical lifting column; The height of the lifting column is adjusted by a worm and worm gear reducer; a hinge I is arranged at the top of the lifting column, the hinge I is connected to a transverse telescopic rod, and a hinge II is arranged at a position close to the hinge I on the transverse telescopic rod; a series of positioning pin holes are arranged on the upper section of the lifting column; One end of the diagonal strut is connected to the hinge II, and the other end is connected to a positioning pin hole on the upper section of the lifting column through a positioning pin, and the attack angle α of the transverse telescopic rod is adjusted by adjusting the positioning pin hole; The length of the extended cross bar of the transverse telescopic rod is controlled manually, a detection alarm is fixed at the front end of the transverse telescopic rod, a gas collection hood is fixed on the detection alarm, and a gas concentration sensor probe is installed in the gas collection hood.

[0007] Further, the gas collecting hood has a bowl-shaped opening for collecting combustible gas; the material of the gas collecting hood is a lightweight material; the gas collecting hood has a series of different sizes. Among them, the large-size gas collecting hood is used to increase the collection range and improve the sensitivity of early warning, and the small-size gas collecting hood is used to locate the leakage position of combustible gas.

[0008] Further, the detection and alarm instrument is provided with an alarm threshold. When the gas concentration sensor probe collects a gas concentration exceeding the alarm threshold, the detection and alarm instrument gives an audible and visual alarm; at the same time, the detection and alarm instrument conditions and amplifies the collected gas concentration signal and transmits it to the remote monitoring device through the line of the gas concentration sensor.

[0009] Further, the material of the transverse telescopic rod is carbon fiber.

[0010] Further, the transverse telescopic rod has a hollow inner cavity for running the line of the gas concentration sensor. The line extends from the rear end of the transverse telescopic rod and is externally connected to a gas detector.

[0011] Further, the telescopic length of the transverse telescopic rod can be adjusted steplessly, and the maximum extended length is 5 m.

[0012] Further, the telescopic height of the lifting column can be adjusted steplessly, and the lifting height range is 1.5 m to 3 m.

[0013] Further, a counterweight is installed in the inner cavity of the support for increasing the stability of the support; another counterweight matching the transverse telescopic rod is fixed on the upper mounting plane of the support for increasing the stability of the transverse telescopic rod.

[0014] Further, the sliding universal wheel has a brake.

[0015] The usage method of the mobile gas leakage detection device of the present invention includes the following steps: Push the mobile gas leakage detection device to a position near the detection position of the hypersonic wind tunnel test pipeline, manually stretch the transverse telescopic rod, estimate the pitching angle of the transverse telescopic rod, and connect the other end of the diagonal brace to the corresponding positioning pin hole on the upper section of the lifting column through a positioning pin; shake the handle of the worm and gear reducer to adjust the height of the lifting column; rotate the mobile gas leakage detection device to move the gas collecting hood to the detection position of the hypersonic wind tunnel gas pipeline; open the brake of the sliding universal wheel to fix the mobile gas leakage detection device.

[0016] The mobile gas leakage detection device of the present invention is flexible, stable, adjustable, and has a large coverage area. The usage method is convenient and easy to operate, solves the problem of lightweight gas leakage detection in hypersonic wind tunnel tests, and has engineering practical value. Description of the Drawings

[0017] Figure 1 This is a schematic structural diagram of the mobile gas leakage detection device of the present invention.

[0018] In the figure, 1. Gas collection hood; 2. Detection and alarm instrument; 3. Horizontal telescopic rod; 4. Diagonal brace; 5. Lifting column; 6. Worm and worm gear reducer; 7. Counterweight; 8. Support; 9. Sliding universal wheel; 10. Hinge I; 11. Hinge II; 12. Positioning pin hole; 13. Positioning pin. Specific implementation mode

[0019] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0020] Embodiment: As Figure 1 shown, the support 8 of the mobile gas leakage detection device of this embodiment has two horizontal mounting planes, the lower mounting plane is fixed with several sliding universal wheels 9, and the upper mounting plane is fixed with a vertical lifting column 5; The height of the lifting column 5 is adjusted by a worm and worm gear reducer 6; a hinge I 10 is arranged at the top of the lifting column 5, the hinge I 10 is connected to the horizontal telescopic rod 3, and a hinge II 11 is arranged at a position close to the hinge I 10 on the horizontal telescopic rod 3; a series of positioning pin holes 12 are arranged on the upper section of the lifting column 5; One end of the diagonal brace 4 is connected to the hinge II 11, and the other end is connected to a positioning pin hole 12 on the upper section of the lifting column 5 through a positioning pin 13, and the angle of attack α of the horizontal telescopic rod 3 is adjusted by adjusting the positioning pin hole 12; The length of the horizontal telescopic rod 3 is controlled manually, the front end of the horizontal telescopic rod 3 is fixed with a detection and alarm instrument 2, the detection and alarm instrument 2 is fixed with a gas collection hood 1, and a gas concentration sensor probe is installed in the gas collection hood 1.

[0021] Furthermore, the gas collection hood 1 has a bowl-shaped opening for collecting combustible gas; the material of the gas collection hood 1 is a lightweight material; the gas collection hood 1 has a series of different sizes, among which, the large-size gas collection hood is used to increase the collection range and improve the sensitivity of early warning, and the small-size gas collection hood is used to locate the leakage position of combustible gas.

[0022] Furthermore, the detection and alarm instrument 2 is provided with an alarm threshold. When the gas concentration sensor probe collects a gas concentration exceeding the alarm threshold, the detection and alarm instrument 2 gives an audible and visual alarm; at the same time, the detection and alarm instrument 2 conditions and amplifies the collected gas concentration signal, and transmits it to the remote monitoring device through the line of the gas concentration sensor.

[0023] Furthermore, the material of the horizontal telescopic rod 3 is carbon fiber.

[0024] Furthermore, the horizontal telescopic rod 3 has a hollow inner cavity for routing the wires of the gas concentration sensor. The wires extend from the rear end of the horizontal telescopic rod 3 and are externally connected to a gas detector.

[0025] Furthermore, the telescopic length of the horizontal telescopic rod 3 can be adjusted steplessly, and the maximum extended length is 5 m.

[0026] Furthermore, the telescopic height of the lifting column 5 can be adjusted steplessly, and the lifting height range is 1.5 m to 3 m.

[0027] Furthermore, a counterweight is installed inside the support 8 to increase the stability of the support 8; another counterweight 7 matching the horizontal telescopic rod 3 is fixed on the upper mounting plane of the support 8 to increase the stability of the horizontal telescopic rod 3.

[0028] Furthermore, the swivel caster 9 has a brake.

[0029] The usage method of the mobile gas leakage detection device in this embodiment includes the following steps: Push the mobile gas leakage detection device near the detection position of the hypersonic wind tunnel test pipeline, manually stretch the horizontal telescopic rod 3, estimate the pitching angle of the horizontal telescopic rod 3, and connect the other end of the diagonal brace 4 to the corresponding positioning pin hole 12 on the upper section of the lifting column 5 through the positioning pin 13; shake the handle of the worm and worm gear reducer 6 to adjust the height of the lifting column 5; rotate the mobile gas leakage detection device to move the gas collection hood 1 to the detection position of the hypersonic wind tunnel gas pipeline; release the brake of the swivel caster 9 to fix the mobile gas leakage detection device.

[0030] Although the embodiments of the present invention are disclosed as above, they are not limited to the applications listed in the specification and embodiments. For those familiar with the art, without departing from the principle of the present invention, all the features disclosed in the present invention, or all the steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any way. The present invention is not limited to the specific details and the illustrated examples here.

Claims

1. A mobile gas leakage detection device, characterized in that: The support (8) of the mobile gas leakage detection device has two upper and lower horizontal installation planes, the lower installation plane is fixed with a plurality of sliding universal wheels (9), and the upper installation plane is fixed with a vertical lifting column (5); The height of the lifting column (5) is adjusted by a worm gear reducer (6); a hinge I (10) is provided at the top of the lifting column (5), the hinge I (10) is connected to the transverse telescopic rod (3), and a hinge II (11) is provided on the transverse telescopic rod (3) near the hinge I (10); a series of positioning pin holes (12) are provided on the upper section of the lifting column (5); One end of the diagonal support rod (4) is connected to the hinge II (11), and the other end is connected to a positioning pin hole (12) on the upper section of the lifting column (5) through a positioning pin (13). The angle of attack α of the transverse telescopic rod (3) is adjusted by adjusting the positioning pin hole (12); The horizontal telescopic rod (3) is manually controlled to extend the horizontal rod length, the front end of the horizontal telescopic rod (3) is fixed with a detection alarm (2), the detection alarm (2) is fixed with a gas collection hood (1), and a gas concentration sensor probe is installed in the gas collection hood (1).

2. A mobile gas leakage detection device according to claim 1, characterized in that: The gas collecting hood (1) has a bowl-shaped opening, and the bowl-shaped opening is used to collect combustible gas; the gas collecting hood (1) is made of a lightweight material; the gas collecting hood (1) has a series of different sizes, wherein a large-sized gas collecting hood is used to increase the collection range and improve the sensitivity of the early warning, and a small-sized gas collecting hood is used to locate the leakage position of the combustible gas.

3. A mobile gas leakage detection device according to claim 1, characterized in that: The detection alarm (2) is provided with an alarm threshold. When the gas concentration detected by the gas concentration sensor probe exceeds the alarm threshold, the detection alarm (2) generates an audible and visual alarm. At the same time, the detection alarm (2) conditions and amplifies the collected gas concentration signal and transmits it to the remote monitoring device through the line of the gas concentration sensor.

4. A mobile gas leakage detection device according to claim 1, characterized in that: The material of the transverse telescopic rod (3) is carbon fiber.

5. The mobile gas leakage detection device according to claim 1, characterized in that: The transverse telescopic rod (3) has a hollow inner cavity, and the hollow inner cavity is used to run the circuit of the gas concentration sensor. The circuit extends from the rear end of the transverse telescopic rod (3) and is externally connected to a gas detector.

6. A mobile gas leakage detection device according to claim 1, characterized in that: The telescopic length of the transverse telescopic rod (3) can be adjusted steplessly, and the maximum extension length is 5m.

7. A mobile gas leakage detection device according to claim 1, characterized in that: The telescopic height of the lifting column (5) can be adjusted steplessly, and the lifting height range is 1.5m~3m.

8. The mobile gas leakage detection device according to claim 1, characterized in that: A counterweight block is installed in the inner cavity of the support (8) for increasing the stability of the support (8); another counterweight (7) matching the transverse telescopic rod (3) is fixed on the upper mounting plane of the support (8) for increasing the stability of the transverse telescopic rod (3).

9. The mobile gas leakage detection device according to claim 1, characterized in that: The sliding universal wheel (9) has a brake.

10. A method for using a mobile gas leakage detection device, characterized in that: The method of use comprises the following steps: The mobile gas leak detection device is pushed to the vicinity of the detection position of the hypersonic wind tunnel test pipeline, the transverse telescopic rod (3) is manually stretched, the pitch angle of the transverse telescopic rod (3) is estimated, and the other end of the diagonal support rod (4) is connected to the corresponding positioning pin hole (12) of the upper section of the lifting column (5) through the positioning pin (13); the handle of the turbine worm reducer (6) is shaken to adjust the height of the lifting column (5); the mobile gas leak detection device is rotated to move the gas collecting cover (1) to the detection position of the hypersonic wind tunnel gas pipeline; the sliding universal wheel (9) brake is opened to fix the mobile gas leak detection device.

Images