An apparatus for automatically cleaning a gas bag and collecting gas

Abstract

The utility model belongs to the technical field of gas sample collection, concretely is a kind of automatic cleaning gas bag and collecting gas device. Including: fixed steel sheet, install in the gas circuit subassembly of fixed steel sheet front, the base of bottom and the circuit system of control gas circuit subassembly operation;The gas circuit subassembly includes sequentially connected: gas circuit interface, for connecting external gas source;Heating dehumidification unit, by heat preservation pipe and built-in heating wire;Variable pressure valve, for converting high-pressure gas into low-pressure gas;Flowmeter, for real-time display gas flow;Electronic tee, its first end connects flowmeter, second end is exhaust end;Filtering device, for filtering gas impurity;Pressure switch, its inlet connects filtering device;Gas bag interface, is connected pressure switch export by pipeline;Vacuum pump, its inlet is connected gas bag export by pipeline.The utility model effectively solves the problems, such as low efficiency of manual cleaning, residual pollution and other problems, such as sampling error caused by easy.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas sampling, specifically an automatic gas bag cleaning and gas sampling device. Background Technology

[0002] Gas bag sampling is widely used in coal mine gas and coalbed methane extraction, environmental monitoring, industrial waste gas analysis, and laboratory gas collection. Traditional gas bag sampling typically involves the following steps: manually cleaning or purging the gas bag, and then refilling it with the target gas. However, this method has significant drawbacks: 1. Low cleaning efficiency: During on-site sampling, manual cleaning requires pressing the gas bag to expel the gas sample. Since on-site conditions often lack support for the gas bag, manual squeezing by hand is necessary. This often results in the gas bag being folded and damaged, or incomplete removal of residual gas, leading to incomplete cleaning. Using a purging method is also insufficient to completely remove residual gas, especially highly absorbent volatile organic compounds, which may cause inaccuracies in subsequent sampling data.

[0003] 2. Cumbersome operation: Traditional methods require multiple manual rinsing, drying and inspection, which is time-consuming and labor-intensive and cannot meet the needs of high-frequency sampling.

[0004] 3. The collected gas was not pretreated. When collecting high-pressure gas, it is necessary to depressurize it. If the water content in the gas is high, condensation may occur. However, when collecting gas samples manually, it is impossible to heat the gas samples to remove water.

[0005] 4. Lack of standardization: Inconsistent cleaning procedures among different operators reduce the comparability of data.

[0006] Currently, some automated gas sampling equipment exists on the market, but most are geared towards low-pressure sampling and focus more on the sampling process, without integrating automatic gas bag cleaning functions. In the process of sampling gas from coal mines or coalbed methane wells, high-pressure pipelines are involved. Therefore, there is an urgent need for an integrated device that can collect gas from high-pressure pipelines and efficiently and automatically complete gas bag cleaning and gas collection, in order to improve the accuracy of sampling data and ease of operation. Summary of the Invention

[0007] This invention solves the problems of automatic cleaning of gas bags and collection of gas samples when collecting gas samples in coal mines, coalbed methane wells, and other locations, and provides an automatic gas bag cleaning and gas collection device.

[0008] This utility model adopts the following technical solution: an automatic gas bag cleaning and gas collection device, comprising: A fixed steel plate, an air circuit assembly installed on the front of the fixed steel plate, a base at the bottom, and an electrical system for controlling the operation of the air circuit assembly; The gas path assembly includes components connected in sequence: Gas connection interface, used to connect to an external gas source; The heating and dehumidification unit consists of an insulation tube and a built-in heating wire. A pressure regulating valve is used to convert high-pressure gas into low-pressure gas. Flow meter, used to display gas flow rate in real time; The electronic tee has a flow meter connected to its first end and an exhaust end connected to its second end. A filtration device used to filter gaseous impurities; A pressure switch, the inlet of which is connected to a filter device; The air bag interface is connected to the pressure switch outlet via a pipeline; The vacuum pump has its inlet connected to the outlet of the gas bag via a pipeline.

[0009] In some embodiments, the circuit system includes: The pressure sensor is installed in the pipeline between the pressure switch and the air bag interface; An electronic counting switch, electrically connected to a pressure switch and a vacuum pump.

[0010] In some embodiments, the pressure switch is configured to: When the pressure sensor detects a value >3kPa, the intake passage is closed and the electronic three-way valve is triggered to open the exhaust end. At the same time, the vacuum pump and electronic counter switch are started to count. When the pressure sensor reading is less than -0.1 kPa, close the exhaust passage and stop the vacuum pump; The electronic counter switch is configured to accumulate the number of times the pressure switch is triggered, and then forcibly disconnect the vacuum pump circuit after reaching a set number of triggers.

[0011] In some embodiments, the heating and dehumidification unit is a stainless steel insulated tube with a length of 10cm and a heating wire wound inside.

[0012] In some embodiments, a T-junction is provided between the air bag interface I and the air bag outlet II to adapt to the inlet / outlet diversion control of a single-port air bag.

[0013] In some embodiments, the exhaust end of the vacuum pump is connected to a venting pipe, and the vacuum pump is fixed to the back of a fixed steel plate.

[0014] In some embodiments, the circuit system is powered by a battery installed inside the base.

[0015] In some embodiments, the electronic counter switch is provided with a count setting module, and the default number of cleaning cycles is 3.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes an integrated gas path device to heat and filter sample gas. An automatic circuit system switches between gas collection and evacuation for further cleaning of the gas bag, achieving automated cleaning and gas collection. This effectively solves problems such as low efficiency and residual contamination that can lead to sampling errors during manual cleaning. During gas sampling, the gas bag is automatically cleaned and gas is collected, eliminating the drawbacks of incomplete cleaning and cumbersome operation associated with manual sampling. Attached Figure Description

[0017] Figure 1 For connection to the automatic cleaning and sampling device for double-hole sampling bags; Figure 2 For connection to the automatic cleaning and sampling device for single-hole sampling bags; Figure 3 This is a schematic diagram of the circuit system connection; In the diagram, 1-Gas inlet; 2-Insulation pipe; 3-Heating wire; 4-Pressure transformer; 5-Flow meter; 6-Electronic tee; 7-Filter device; 8-Pressure switch; 9-Pressure sensor; 10-Gas bag inlet I; 11-Gas bag; 12-Gas bag inlet II; 13-Battery; 14-Base; 15-Electronic counting switch; 16-Vacuum pump; 17-Fixing steel plate; 18-Tee. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] An automatic gas bag cleaning and gas collection device includes: The fixed steel plate 17, the air circuit assembly installed on the front of the fixed steel plate, the base 14 at the bottom, and the circuit system for controlling the operation of the air circuit assembly; The gas path assembly includes components connected in sequence: Gas interface 1 is used to connect to an external gas source; heating and dehumidification unit consists of insulation pipe 2 and built-in heating wire 3; pressure transformer valve 4 is used to convert high-pressure gas into low-pressure gas; flow meter 5 is used to display gas flow rate in real time; electronic tee 6 has its first end connected to flow meter 5 and its second end as the exhaust end; filter device 7 is used to filter gas impurities; pressure switch 8 has its inlet connected to filter device 7; gas bag interface 10 is connected to the outlet of pressure switch 8 through a pipeline; vacuum pump 16 has its inlet connected to gas bag outlet 12 through a pipeline.

[0020] The circuit system includes: a pressure sensor 9, which is located in the pipeline between the pressure switch 8 and the air bag interface 10; and an electronic counting switch 15, which is electrically connected to the pressure switch 8 and the vacuum pump 16.

[0021] The pressure switch 8 is configured to: when the pressure sensor 9 detects a value > 3 kPa, close the intake passage and trigger the electronic three-way valve 6 to open the exhaust end, while simultaneously starting the vacuum pump 16 and the electronic counting switch 15 to count; when the pressure sensor 9 detects a value < -0.1 kPa, close the exhaust passage and stop the vacuum pump 16. The electronic counting switch 15 is configured to accumulate the number of times the pressure switch 8 is triggered, and to forcibly disconnect the vacuum pump 16 circuit after reaching the set number of triggers.

[0022] The heating and dehumidification unit is a stainless steel insulated tube 2, with a length of 10cm, and a heating wire 3 is wound inside.

[0023] A three-way valve 18 is provided between the air bag inlet I10 and the air bag outlet II12 to adapt to the inlet / outlet diversion control of a single-port air bag.

[0024] The exhaust end of the vacuum pump 16 is connected to the vent pipe, and the vacuum pump 16 is fixed to the back of the fixed steel plate 17.

[0025] The circuit system is powered by battery 13, which is installed inside base 14.

[0026] The electronic counting switch 15 is equipped with a count setting module, with a default cleaning count of 3 times.

[0027] All components are assembled onto a fixed steel plate, supported by a base for easy portability and secure mounting. The steel plate features a gas connection interface, which can connect to either a flexible hose or a stainless steel tube. The other end of the gas connection interface connects to a 10cm insulated tube fixed to the steel plate to remove moisture from the gas sample. Downstream of the insulated tube is a pressure regulator valve, which converts the high-pressure gas sample to a low-pressure sample for easier sampling. Downstream of the pressure regulator valve is a flow meter to ensure flow rate visibility and facilitate airflow adjustment. Downstream of the flow meter is an electronic tee to discharge excess gas. Downstream of the tee is a filter to remove particles, oil, and other impurities from the gas sample. Downstream of the filter is a pressure switch for automatic cleaning. A pressure sensor is installed in the pipe behind the pressure switch and connected to the sampling bag inlet. (When the sampling bag is a double-port sampling bag, the two ports can be divided into an inlet and an outlet; when the sampling bag is a single-port sampling bag, a T-junction needs to be added to the connecting pipe here to make the inlet and outlet controllable.) There is another air passage in the lower half of the fixed steel plate, which contains a vacuum pump. One end of the vacuum pump is connected to the outlet of the sampling bag, and the other end is vented.

[0028] The device is equipped with a circuit system. When the pressure of the pressure switch exceeds 3 kPa (the pressure when the gas bag is full), the pressure switch will close the air inlet pipe and simultaneously open the top passage of the electronic tee to release excess gas. At the same time, the vacuum pump will start, evacuating the gas bag and causing the pressure to drop. When the pressure reaches -0.1 kPa (the pressure when the gas bag is emptied), the pressure switch will open the air inlet pipe, the top passage of the electronic tee will close, the vacuum pump will shut off, and gas will begin to fill the gas bag, causing the pressure to rise. When the pressure exceeds 3 kPa, the pressure switch will close the air inlet, and this cycle repeats. An electronic counter switch is added between the pressure switch and the vacuum pump to count the number of times the circuit is activated. The number of times the gas bag needs to be flushed can be set on the electronic counter switch. When the count is reached, the electronic switch will close, so even if the pressure exceeds 3 kPa, the vacuum pump will not be activated again, the gas bag will remain full, and gas collection is complete.

[0029] To use, first connect the gas lines. Connect the sampling bag to the device, connecting the double-port gas bags according to the diagram. Connect the sample gas to gas line interface 1 on the stainless steel panel. Next, turn on the power switch and set the number of times to clean the gas bag on the electronic counter switch, usually set to 3 times. Finally, open the gas valve to begin collecting the gas.

[0030] In the first specific process, after the gas path is connected, the gas enters the device through gas path interface 1, is heated by the insulation tube 2, and then enters the pressure transformer valve 4 to convert the high-pressure gas into a gas pressure suitable for collecting gas samples. The gas flow rate can be read by the flow meter 5 to observe the gas flow status. A controllable electronic tee 6 and a filter device 7 are added to the rear gas path. The filter device removes impurities from the gas sample. After filtration, the gas sample passes through the pressure switch 8. The pressure sensor 9 of the pressure switch 8 is placed between the pressure switch and the gas bag inlet. The rear gas path is connected to the gas bag inlet I10. Then, the gas is connected to the gas outlet II12 through the gas outlet pipe on the panel. The pipe is connected to the vacuum pump 16 for easy vacuum pumping.

[0031] In the second specific process, when the pressure of pressure switch 8 exceeds 3 kPa, pressure switch 8 opens the venting passage. First, the electronic tee 6 is opened to vent the gas in the pipeline. At the same time, the electronic counter switch 15 is activated to record the circuit connection once. The vacuum pump 16, connected in series with the electronic counter switch, begins to evacuate the gas bag. When the gas bag pressure is less than -0.1 kPa, pressure switch 8 closes the venting passage. Simultaneously, the electronic tee 6 closes, and the electronic counter switch and vacuum pump are turned off, initiating the second gas sample collection process. When the pressure exceeds 3 kPa, pressure switch 8 reopens the venting passage. This time, the electronic counter switch 15 records the circuit connection twice, and this process repeats. When the electronic counter switch 15 records more than three circuit connections, it automatically disconnects the circuit. At this point, gas collection is complete, and the gas bag can be removed.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automatic gas bag cleaning and gas collection device, characterized in that, include: The fixed steel plate (17), the air circuit assembly installed on the front of the fixed steel plate, the base (14) at the bottom, and the circuit system for controlling the operation of the air circuit assembly; The gas path assembly includes components connected in sequence: Gas interface (1) is used to connect to an external gas source; The heating and dehumidification unit consists of an insulation tube (2) and a built-in heating wire (3); The pressure regulating valve (4) is used to convert high-pressure gas into low-pressure gas; Flow meter (5) is used to display gas flow rate in real time; The electronic tee (6) has a first end connected to a flow meter (5) and a second end for exhaust. Filtering device (7) is used to filter gas impurities; Pressure switch (8), whose inlet is connected to filter device (7); The air bag interface I (10) is connected to the outlet of the pressure switch (8) via a pipeline; The vacuum pump (16) has its inlet connected to the outlet II (12) of the gas bag via a pipeline.

2. The automatic gas bag cleaning and gas collection device according to claim 1, characterized in that, The circuit system includes: A pressure sensor (9) is installed in the pipeline between the pressure switch (8) and the air bag interface I (10); An electronic counting switch (15) is electrically connected to a pressure switch (8) and a vacuum pump (16).

3. The automatic gas bag cleaning and gas collection device according to claim 2, characterized in that, The pressure switch (8) is configured to: When the pressure sensor (9) detects a value >3kPa, the intake passage is closed and the electronic three-way valve (6) is triggered to open the exhaust end. At the same time, the vacuum pump (16) and the electronic counting switch (15) are started to count. When the pressure sensor (9) detects a value < -0.1 kPa, the exhaust passage is closed and the vacuum pump (16) is stopped. The electronic counting switch (15) is configured to accumulate the number of times the pressure switch (8) is triggered, and to forcibly disconnect the vacuum pump (16) circuit after the set number of times is reached.

4. The automatic gas bag cleaning and gas collection device according to claim 1, characterized in that, The heating and dehumidification unit is a stainless steel heat-insulating pipe (2) with a length of 10cm and a heating wire (3) wrapped inside.

5. The automatic gas bag cleaning and gas collection device according to claim 1, characterized in that, A three-way valve (18) is provided between the air bag interface I (10) and the air bag outlet II (12) for adapting to the inlet / outlet diversion control of a single-port air bag.

6. The automatic gas bag cleaning and gas collection device according to claim 1, characterized in that, The exhaust end of the vacuum pump (16) is connected to the venting pipe, and the vacuum pump (16) is fixed to the back of the fixed steel plate (17).

7. The automatic gas bag cleaning and gas collection device according to claim 1, characterized in that, The circuit system is powered by a battery (13), which is installed inside the base (14).

8. The automatic gas bag cleaning and gas collection device according to claim 2, characterized in that, The electronic counting switch (15) is equipped with a count setting module, with a default cleaning count of 3 times.

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