Internal and external gas filtering devices and gas detecting device

A filter device and gas detection technology, which is applied in the direction of measuring device, dispersed particle filtration, test sample preparation, etc., can solve the problem of infiltrating a small part or not infiltrating, increasing product maintenance cost and maintenance frequency, and not correctly reflecting In order to avoid problems such as combustible gas content, it can achieve long service life, facilitate continuous work, and improve measurement accuracy and accuracy.

Inactive Publication Date: 2012-06-13
HENAN HANWEI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The air in the septic tank or the underground pipe network is generally humid and dirty, and there are some viscous tiny particles mixed in it. The detection instrument uses a pump to pump out the gas in the septic tank or the underground pipe network. The surface of the sensor of the instrument is tested. After a certain period of time, the surface of the metallurgical powder mesh on the surface of the sensor will be stuck with sticky matter, resulting in a serious deterioration of its air permeability, or even airtightness. Only a small part or If the penetration cannot penetrate, the detection result of the detector cannot correctly reflect the combustible gas content in the septic tank or in the pipeline, and the gas detector cannot play a practical role
[0006] In order to solve the above problems, the gas detectors of many manufacturers have added filter devices, that is, when the gas is pumped up by a pump, it is filtered first, and then the gas is sent to the detector for detection; but because the filter device is relatively simple, It is not enough to solve the above problems, so that the metallurgical powder net will still be blocked after the product has been working for a period of time, which greatly increases the maintenance cost and frequency of the product, and also has a negative impact on the users of gas detectors

Method used

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  • Internal and external gas filtering devices and gas detecting device
  • Internal and external gas filtering devices and gas detecting device
  • Internal and external gas filtering devices and gas detecting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] like Figure 4 As shown, a gas detection device includes a gas detector 10, a detection chamber 11, an air pump 12, a check valve 13, a gas drying device 14, a gas filter device 9 and an explosion-proof fan; wherein the gas filter device 9 The suction hole of the gas drying device 14 is connected to the air inlet, the gas outlet of the gas drying device 14 is connected to the inlet of the check valve 13, and the outlet of the check valve 13 is connected to the inlet of the air pump 12. The air outlet of the air pump 12 is connected to the air inlet of the detection chamber 11; the gas detector 10 is installed in the detection chamber 11 or on the wall of the chamber, and the detection chamber 11 is provided with an outlet The gas port is used to facilitate the gas circulation in the detection chamber 11; the gas drying device 9 is a built-in gas filter device.

[0024] The gas detector 10 includes a microprocessor circuit and a gas detection circuit respectively connec...

Embodiment 2

[0031] The main difference between this embodiment and Embodiment 1 is that the gas drying device 9 is an external gas filtering device.

[0032] like image 3 As shown, an external gas filter device includes an outer cylinder 6 and the built-in gas filter device described in Embodiment 1, wherein the double-layer cylinder body of the built-in gas filter device is sleeved in the outer cylinder 6, The mouth of the outer cylinder 6 is in sealing connection with the edge of the cylinder cover 4 , and the bottom of the outer cylinder 6 is provided with an air inlet hole 7 .

[0033] When in use, set the external gas filter device outside the biogas tank or outside the underground pipe network, and use a suction pipe so that one end is connected to the air inlet 7, and the other end is placed in the biogas tank or in the underground pipe network, and then It is sufficient to connect the suction hole 5 of the external gas filter device with the air inlet of the gas drying device 14...

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Abstract

The invention provides internal and external gas filtering devices and a gas detecting device; the internal gas filtering device comprises a double layer of cylinders, a cylinder cover, and exhaust holes and filter paper arranged on the cylinder cover; ventilating holes are densely distributed on the inner and outer layers of cylinder walls of the double layer of cylinders, respectively; the filter paper is arranged between the inner and outer layers of cylinder walls; the external gas filtering device comprises an outer cylinder and an internal gas filtering device; a double layer of cylinders is sleeved in the outer cylinder, the cylinder opening of the outer cylinder is hermetically connected with the edge of the cylinder cover, and an air inlet hole is arranged on the bottom part of the outer cylinder; the gas detecting device comprises a gas detector, and a detecting chamber, an air extracting pump, a check valve, a gas drying device and a gas filtering device, which are communicated in sequence; the gas detector is installed in the detecting chamber, the gas drying device is an internal gas drying device or an external gas drying device. The gas filtering device has the advantages of simple structure, good filtering effect, convenience for use and strong practicability, and the gas detecting device has the advantages of accurate detection result and long service life.

Description

technical field [0001] The invention relates to a gas detection device, in particular to an internal and external gas filter device and a gas detection device. Background technique [0002] After the urban domestic sewage enters the septic tank, under natural conditions, it flows into the urban sewage pipeline after anaerobic fermentation, decomposition and settlement by bacteria, and finally flows into the sewage treatment plant for treatment; in the process of septic tank, it will A large amount of harmful gas is produced, the main component of which is combustible gas methane, and a small amount of hydrogen sulfide, ammonia, etc. The total gas composition is relatively complex; when the combustible gas accumulates more and more and reaches the lower limit of explosion, when it encounters an open flame or the temperature in the pool When it is too high, it will cause an explosion; at present, there have been many public reports of septic tank explosions and injuries. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/24B01D46/52G01N1/34G01N33/00
Inventor 张志广杜瑞杰张广来李冬明王婷
Owner HENAN HANWEI ELECTRONICS
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