CN210893577U - Sampling gun leak detection device of portable flue gas sampling instrument - Google Patents
Sampling gun leak detection device of portable flue gas sampling instrument Download PDFInfo
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- CN210893577U CN210893577U CN201922240791.6U CN201922240791U CN210893577U CN 210893577 U CN210893577 U CN 210893577U CN 201922240791 U CN201922240791 U CN 201922240791U CN 210893577 U CN210893577 U CN 210893577U
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Abstract
The utility model provides a sampling gun leak detection device of a portable flue gas sampling instrument, which comprises a plugging nozzle, a sampling gun, a volume flow meter, a pressure sensor and a vacuum pump; the sampling gun has a gas inlet end; the blocking nozzle sequentially comprises a threaded section, a fastening section and a screwing section; the threaded section, the fastening section and the screwing section are of an integrated structure; the thread section and the fastening section are solid bodies; the tightening section is in a circular truncated cone shape; the blocking nozzle is connected to the gas inlet end through a threaded section; the sampling gun is sequentially connected with the volume flow meter, the pressure sensor and the vacuum pump. The device has simple structure, strong practicability and few components, and is suitable for leak detection of the sampling gun of the continuous flue gas sampling device for all incineration flue gas; and simultaneously, the utility model provides a sampling rifle leak hunting device leakproofness of flue gas sampling appearance is strong, and the measuring result is reliable, has normalization and rigor, accords with flue gas sampling standard.
Description
Technical Field
The utility model relates to a gaseous sampling technical field, concretely relates to sampling rifle leak hunting device of portable flue gas sampling appearance.
Background
The portable smoke gas sampling instrument needs to perform leak detection before sampling every time to confirm the air tightness of the whole device, however, a sampling gun in the smoke gas sampling instrument does not have a special nozzle for leak detection at present, a method for blocking the sampling nozzle by hand is generally adopted during leak detection of the sampling gun in the prior art, the method has no normalization and rigidness, does not accord with smoke gas sampling standards, and the measurement result is unreliable; in the other flue gas sampling instrument, the rear end of the sampling gun is provided with an electromagnetic valve to avoid leakage detection of the sampling gun, and the method also does not accord with the national flue gas sampling standard.
SUMMERY OF THE UTILITY MODEL
For solving the above-mentioned problem that exists among the prior art, the utility model provides a sampling rifle leak hunting device among portable flue gas sampling instrument, device simple structure, practicality are strong, are fit for the sampling rifle leak hunting to all continuous flue gas sampling device who burns the flue gas.
The utility model discloses technical scheme as follows:
a leak detection device of a portable flue gas sampler comprises a blocking nozzle, a sampling gun, a volume flow meter, a pressure sensor and a vacuum pump;
the sampling gun has a gas inlet end;
the blocking nozzle sequentially comprises a threaded section, a fastening section and a screwing section; the threaded section, the fastening section and the screwing section are of an integrated structure; the thread section and the fastening section are solid bodies; the tightening section is in a circular truncated cone shape;
the blocking nozzle is connected to the gas inlet end through a threaded section;
the sampling gun is sequentially connected with the volume flow meter, the pressure sensor and the vacuum pump.
Based on above technical scheme, preferably, stifled mouth still includes sealed original paper, sealed original paper is the ring shape, sealed original paper embolias the screw thread section to contact with the holding surface of fastening section.
Based on the above technical solution, preferably, the sealing element is a sealing gasket; the fastening section is hexagonal prism shaped.
Based on above technical scheme, preferably, the screw thread section is equipped with the external screw thread, the gas entry end of sampling rifle is equipped with the internal thread, the screw thread section passes through interior external screw thread connection with the sampling rifle.
When the blocking nozzle is installed at the gas inlet end of the sampling gun, the fastening section and the screwing section are matched for use, the blocking nozzle is installed at the gas inlet end of the sampling gun through the screwing section by hands, and then the blocking nozzle is fastened at the fastening section through the fork wrench.
Advantageous effects
1. The utility model provides a sampling rifle leak hunting device of portable flue gas sampling appearance, device simple structure, practicality are strong, the subassembly is few, are fit for the sampling rifle leak hunting to all continuous flue gas sampling device who burns the flue gas.
2. The utility model provides a sampling rifle leak hunting device leakproofness of flue gas sampling appearance is strong, and the measuring result is reliable, has normalization and rigor, accords with flue gas sampling standard.
Drawings
FIG. 1 is a drawing of a sampling gun nozzle plugging device of a portable smoke sampler;
in the figure: 1. a thread section, 2, a sealing washer, 3, a screwing section, 4 and a fastening section;
Detailed Description
A sampling gun leakage detection device of a portable flue gas sampling instrument comprises a blocking nozzle, a sampling gun, a volume flow meter, a pressure sensor and a vacuum pump; the sampling gun has a gas inlet end; the blocking nozzle sequentially comprises a thread section 1, a fastening section 4 and a screwing section 3; the thread section 1, the fastening section 4 and the tightening section 3 are of an integrated structure; the thread section 1 and the fastening section 4 are solid bodies; the tightening section 3 is in a circular truncated cone shape; the blocking nozzle is connected to the gas inlet end through a thread section 1;
the sampling gun is sequentially connected with the volume flow meter, the pressure sensor and the vacuum pump.
The mouth blocking device further comprises a sealing washer 2, and the sealing washer 2 is sleeved in the threaded section 1 and is in contact with a supporting surface of the fastening section 4.
The fastening section is in a hexagonal prism shape;
the screw thread section is equipped with M10 external screw thread, the gas inlet end of sampling rifle is equipped with the internal thread, the screw thread section passes through interior external screw thread connection with the sampling rifle.
When the plugging nozzle is arranged at the gas inlet end of the sampling gun, the fastening section and the screwing section are matched for use, the plugging nozzle is firstly arranged at the gas inlet end of the sampling gun through the screwing section by hand and then fastened at the hexagonal prism-shaped fastening section through the fork of the fork wrench, and the plugging nozzle is used for preventing gas from entering the sampling gun.
The leakage detection device of the sampling gun of the portable smoke sampler comprises the following leakage detection steps:
the sampling gun comprises a sampling nozzle, the external thread of the threaded section of the blocking nozzle is the same as the external thread of the sampling nozzle, the sampling nozzle is taken down from the gas inlet end of the sampling gun during leak detection according to the national flue gas sampling standard, and the blocking nozzle is arranged at the position of the sampling nozzle; the sampling gun is connected with the volume flow meter, the pressure sensor and the vacuum pump in sequence.
After the device is installed, a leak detection program is started, the vacuum pump is used for reducing pressure of the device, the internal pressure of the device is observed through the pressure sensor, when the internal pressure of the device shows 70KPa, the device operates and maintains the pressure, the flow is calculated through the volume flow meter, the leak detection is unqualified when the flow is more than 0.5l/min, and the leak detection is qualified when the flow is less than or equal to 0.5l/min and is more than 0.
To anyone skilled in the art, without departing from the scope of the present invention, the technical solution disclosed above can be used to make many possible variations and modifications to the technical solution of the present invention, or to modify equivalent embodiments with equivalent variations. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention should still fall within the protection scope of the technical solution of the present invention.
Claims (4)
1. A sampling gun leakage detection device of a portable flue gas sampling instrument is characterized by comprising a blocking nozzle, a sampling gun, a volume flow meter, a pressure sensor and a vacuum pump;
the sampling gun has a gas inlet end;
the blocking nozzle sequentially comprises a threaded section, a fastening section and a screwing section; the threaded section, the fastening section and the screwing section are of an integrated structure; the thread section and the fastening section are solid bodies; the tightening section is in a circular truncated cone shape;
the blocking nozzle is connected to the gas inlet end through a threaded section;
the sampling gun is sequentially connected with the volume flow meter, the pressure sensor and the vacuum pump.
2. The leak detection apparatus according to claim 1, wherein the plug further comprises a sealing element having an annular shape, the sealing element being fitted into the threaded section and contacting the support surface of the fastening section.
3. Leak detection apparatus according to claim 2, wherein the sealing element is a sealing gasket; the fastening section is hexagonal prism shaped.
4. Leak detection apparatus according to any one of claims 1 to 3, wherein the threaded section is provided with external threads, the gas inlet end of the sampling gun is provided with internal threads, and the threaded section is connected with the sampling gun through the internal and external threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922240791.6U CN210893577U (en) | 2019-12-14 | 2019-12-14 | Sampling gun leak detection device of portable flue gas sampling instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922240791.6U CN210893577U (en) | 2019-12-14 | 2019-12-14 | Sampling gun leak detection device of portable flue gas sampling instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210893577U true CN210893577U (en) | 2020-06-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922240791.6U Active CN210893577U (en) | 2019-12-14 | 2019-12-14 | Sampling gun leak detection device of portable flue gas sampling instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210893577U (en) |
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2019
- 2019-12-14 CN CN201922240791.6U patent/CN210893577U/en active Active
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