Detection device for detecting liquid water in gas detection

Abstract

The utility model discloses a liquid water detection device for gas detection, which relates to the technical field of gas detection and comprises a sampling gas pipe, a sampling gas pump, a pulse transmitting electrode and a pulse receiving electrode, and the pulse transmitting electrode and the pulse receiving electrode are mounted on the sampling gas pipe. And the pulse transmitting electrode and the pulse receiving electrode are inserted into the sampling gas pipe. When gas sampling is carried out, the pulse generator transmits pulse signals to the transmitting electrode, and when liquid water does not exist in the sampling gas pipe, due to the fact that the insulativity of gas is extremely high, no signal exists on the receiving electrode; when liquid water exists in the sampling gas pipe, the transmitting electrode and the receiving electrode are conducted through the liquid water, the receiving electrode can receive a pulse signal with the same property as the transmitting electrode, and after the pulse receiver receives the signal, the sampling gas pump is stopped to continue gas sampling, so that whether the liquid water exists or not is detected and judged. And the liquid water is prevented from being further pumped into the instrument.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection, in particular to a liquid water detection device used for gas detection. Background Art

[0002] Article 47 of the "Detailed Rules for Preventing and Controlling Coal and Gas Outbursts" (2019 Edition) stipulates: "When pre-extracting coal seam gas, the extraction time of each borehole should be recorded, and the concentration, negative pressure, temperature, and carbon monoxide of the borehole should be measured regularly." At present, coal mines mostly use instruments such as optical interference methane detectors, carbon monoxide detection tubes, and pump-suction portable gas detectors to detect the gas concentration in the gas extraction pipeline. However, coal seams are rich in groundwater. At the same time, in order to reduce the dust content during coal mining, high-pressure water will be injected into the coal seams in advance. Therefore, there is a high possibility that liquid water exists in the gas extraction pipeline, and even some coal seam gas extraction will directly extract liquid water. When using a pump-suction portable gas detector, the sampling gas pump will extract liquid water into the instrument while extracting gas, resulting in inaccurate measurement of the sensor or even scrapping. Although the pump-suction portable gas detector also comes with waterproof and breathable membranes, gas-water separators and other measures, these measures can only play a certain role in gaseous water vapor, but still cannot prevent liquid water from entering the instrument.

[0003] Although there are some special sensors for liquid water detection, such as droplet sensors, this type of sensor not only requires power supply, but also consumes a lot of power, which is not a good choice for portable instruments that pay more attention to power consumption. Therefore, a method for detecting liquid water in gas detection is proposed here. Utility Model Content

[0004] Technical issues solved

[0005] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide a liquid water detection device for gas detection.

[0006] Technical Solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for detecting liquid water in gas, comprising a sampling gas pipe, a sampling gas pump, a pulse transmitting electrode and a pulse receiving electrode installed on the sampling gas pipe, wherein the sampling gas pipe is connected to the input end of the sampling gas pump, and the pulse transmitting electrode and the pulse receiving electrode are plugged into the interior of the sampling gas pipe.

[0008] Preferably, the pulse transmitting electrode is connected to a pulse generator, and the pulse receiving electrode is connected to a pulse receiver.

[0009] Preferably, the sampling gas pump is connected to a detection instrument, and a sensor capable of detecting gas concentration is provided inside the detection instrument.

[0010] Preferably, the air pump is an air pump with forward and reverse rotation and switchable inlet and outlet ports.

[0011] Preferably, the sampling air pipe is also connected to a vent, a one-way valve is provided on the vent, and the vent is also connected to a drainage air pump.

[0012] Beneficial effects:

[0013] Compared with the prior art, the method for detecting liquid water in gas detection has the following beneficial effects:

[0014] 1. The utility model uses a pulse transmitting electrode and a pulse receiving electrode on the sampling gas pipe. When gas sampling is performed, the pulse generator transmits a pulse signal to the transmitting electrode. When there is no liquid water in the sampling gas pipe, there is no signal on the receiving electrode due to the extremely high insulation of the gas; when there is liquid water in the sampling gas pipe, the liquid water makes the transmitting electrode and the receiving electrode conductive, and the receiving electrode can receive a pulse signal with the same nature as the transmitting electrode. When the pulse receiver receives this signal, it stops the sampling gas pump and continues gas sampling, thereby achieving the detection and judgment of whether liquid water exists and preventing liquid water from being further extracted into the instrument.

[0015] Second, a sampling air pump with forward and reverse switchable inlet and outlet ports is set up. When the presence of liquid water is detected and the sampling air pump is stopped, the sampling air pump is reversed to remove the liquid water in the sampling air path and protect the detection instrument. In addition, a vent, a one-way valve and a drainage air pump are set up so that the presence of liquid water can be detected and the sampling air pump is stopped. The drainage air pump blows air into the sampling air pipe to remove the liquid water in the sampling air path, thereby also achieving the effect of protecting the detection instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model;

[0017] Figure 2 This is a schematic structural diagram of the second embodiment of the present utility model.

[0018] In the figure:

[0019] 1. Sampling air pipe; 2. Sampling air pump; 3. Pulse transmitting electrode; 4. Pulse receiving electrode; 5. Detection instrument; 6. Vent; 7. One-way valve; 8. Drain air pump; 9. Pulse generator; 10. Pulse receiver. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] For example, see Figure 1 As shown, the utility model provides a liquid water detection device for gas detection, including a sampling gas pipe 1, a sampling gas pump 2, a pulse transmitting electrode 3 and a pulse receiving electrode 4 installed on the sampling gas pipe 1, the sampling gas pipe 1 is connected to the input end of the sampling gas pump 2, the pulse transmitting electrode 3 and the pulse receiving electrode 4 are plugged into the inside of the sampling gas pipe 1, the pulse transmitting electrode 3 is connected to the pulse generator 9, the pulse receiving electrode 4 is connected to the pulse receiver 10, the sampling gas pump 2 is connected to the detection instrument 5, the detection instrument 5 is provided with a sensor for gas concentration detection, and the gas pump 2 adopts a gas pump with forward and reverse switchable inlet and exhaust ports.

[0022] For example 2, please refer to Figure 2 As shown, the utility model provides a liquid water detection device for gas detection, including a sampling gas pipe 1, a sampling gas pump 2, a pulse transmitting electrode 3 and a pulse receiving electrode 4 installed on the sampling gas pipe 1, the sampling gas pipe 1 is connected to the input end of the sampling gas pump 2, the pulse transmitting electrode 3 and the pulse receiving electrode 4 are plugged into the inside of the sampling gas pipe 1, the pulse transmitting electrode 3 is connected to the pulse generator 9, the pulse receiving electrode 4 is connected to the pulse receiver 10, the sampling gas pump 2 is connected to the detection instrument 5, the detection instrument 5 is provided with a sensor for gas concentration detection, the sampling gas pipe 1 is also connected to a vent 6, the vent 6 is provided with a one-way valve 7, and the vent 6 is also connected to a drainage air pump 8.

[0023] Working principle: When sampling gas, the pulse generator transmits a pulse signal to the transmitting electrode. When there is no liquid water in the sampling gas pipe, there is no signal on the receiving electrode due to the extremely high insulation of the gas; when there is liquid water in the sampling gas pipe, the liquid water makes the transmitting electrode and the receiving electrode conductive, and the receiving electrode can receive a pulse signal of the same nature as the transmitting electrode. When the pulse receiver receives this signal, it stops the sampling gas pump and continues gas sampling, so as to detect and judge whether there is liquid water and prevent liquid water from being further The water is extracted into the inside of the instrument. The principle of the first embodiment is: a sampling air pump 2 with forward and reverse switchable inlet and outlet ports is set. When the presence of liquid water is detected and the sampling air pump 2 is stopped, the sampling air pump is reversed to remove the liquid water in the sampling air path, thereby protecting the detection instrument. The principle of the second embodiment is: a vent 6, a one-way valve 7 and a drainage air pump 8 are set, which can also detect the presence of liquid water and stop the sampling air pump 2. The drainage air pump 8 blows air into the sampling air pipe 1 to remove the liquid water in the sampling air path, thereby also achieving the effect of protecting the detection instrument.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid water detection device for gas detection, characterized in that: The invention comprises a sampling air pipe (1), a sampling air pump (2), a pulse transmitting electrode (3) and a pulse receiving electrode (4) installed on the sampling air pipe (1); the sampling air pipe (1) is connected to the input end of the sampling air pump (2); and the pulse transmitting electrode (3) and the pulse receiving electrode (4) are plugged into the interior of the sampling air pipe (1).

2. The device for detecting liquid water in gas according to claim 1, characterized in that: The pulse transmitting electrode (3) is connected to a pulse generator (9), and the pulse receiving electrode (4) is connected to a pulse receiver (10).

3. The device for detecting liquid water in gas according to claim 2, characterized in that: The sampling gas pump (2) is connected to a detection instrument (5), and a sensor capable of detecting gas concentration is provided inside the detection instrument (5).

4. The device for detecting liquid water in gas according to claim 1, characterized in that: The air pump (2) is an air pump with forward and reverse rotations and switchable inlet and outlet ports.

5. The device for detecting liquid water in gas according to claim 1, characterized in that: The sampling air pipe (1) is also connected to a vent (6), a one-way valve (7) is provided on the vent (6), and the vent (6) is also connected to a drainage air pump (8).

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