Water network area gas collecting device

Abstract

The utility model provides a water network area gas collecting device which comprises a gas collecting hood, a condensation dewatering device, a detector and a sampling device, one end of the condensation dewatering device is connected with the gas collecting hood through a pipeline, the sampling device is connected with the other end of the condensation dewatering device through a pipeline, and the detector is connected with the gas collecting hood through a pipeline. And the detector is connected with the gas collecting hood through a pipeline. The gas collecting hood is used for collecting gas. And the condensation water removal device is used for pretreating the collected gas, so that the purposes of reducing adsorption and removing water are achieved. The gas collecting device in the water network area is convenient to carry. In the gas collecting process, the collected gas can be pre-judged, and the purity and the effective rate of the collected gas are improved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline leak detection technology, and in particular to a gas collection device for water network areas. Background Technology

[0002] With the rapid development of my country's economy, natural gas has become an important energy source in daily life and production, especially for urban residents, where it has become a necessity. The long-distance natural gas pipeline system traverses diverse and complex regions, with the vast majority of pipelines buried underground, posing significant challenges to leak detection. Furthermore, the unique biogeographical environment of water-rich areas presents even greater challenges to gas collection and analysis. To promptly and effectively determine whether leaked gas is pipeline-transmitted natural gas and ensure the normal operation of natural gas transmission pipelines, a common method is the drainage method. This involves placing a water-filled bottle over the gas, draining the water, and then tightening the cap underwater to collect the gas. However, this process is entirely manual, making it easy for air to enter the bottle, affecting chromatographic analysis results and hindering emergency repairs. Existing technical solutions connect a collector, a vacuum pump, a manual pump, and a storage container. By coordinating the pumps and the manual pump, the air content in the collected gas is reduced through drainage. However, existing collectors are numerous and difficult to transport to the field, and the lack of pre-analysis of the collected gas composition affects analytical efficiency and impacts emergency repair progress. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a gas collection device for water network areas, addressing the shortcomings of existing technologies.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A gas collection device for water network areas includes: a gas collection hood, a condensation and dehydration device, a detector, and a sampling device. One end of the condensation and dehydration device is connected to the gas collection hood through a pipeline, the sampling device is connected to the other end of the condensation and dehydration device through a pipeline, and the detector is connected to the gas collection hood through a pipeline.

[0005] The beneficial effects of adopting this utility model's technical solution are as follows: The gas collection hood is used to collect gas. The condensation and dehydration device pre-treats the collected gas, reducing adsorption and achieving water removal. It enables convenient portability of the gas collection device in water-rich areas. During the gas collection process, the collected gas can be pre-judged, improving the purity and efficiency of the collected gas.

[0006] Furthermore, a filter device is provided on the pipeline between the condensate removal device and the gas collection hood.

[0007] The beneficial effects of adopting the above-mentioned further technical solution are: the filtration device is used to collect and filter the gas, thereby improving the purity and efficiency of the collected gas and increasing the accuracy.

[0008] Furthermore, the filtration device is a particulate matter filtration device, and the detector is a combustible gas detector.

[0009] The beneficial effects of adopting the above-mentioned further technical solution are: the particulate matter filtration device is used to collect and filter the gas; and the combustible gas detector can pre-judge the collected gas.

[0010] Furthermore, a telescopic sampling handle is provided on the pipeline between the condensation and dehydration device and the gas collection hood.

[0011] The beneficial effects of adopting the above-mentioned further technical solution are: during the gas collection process, the length of the collector can be extended or retracted to adjust different distances. This facilitates immersing the gas collection hood or placing it above the water body at the sampling point using the sampling handle with a telescopic function.

[0012] Furthermore, a one-way valve is connected to the top of the gas collection hood via a pipeline.

[0013] The beneficial effects of adopting the above-mentioned further technical solution are: the one-way valve is set so that it will automatically open when the gas in the gas collection hood is too large and automatically close when the pressure in the gas collection hood is too low, so as to prevent the collection of external gas and maintain the stability of the gas collection hood.

[0014] Furthermore, the sampling device is an air bag sampler, which is connected to the other end of the condensate removal device via a pipeline.

[0015] The beneficial effect of adopting the above-mentioned further technical solution is that air bag sampling can be completed by connecting the vacuum box air bag sampler to the air outlet of the pretreatment device.

[0016] Furthermore, the air bag sampler is a ZR-3521 type vacuum box air bag sampler.

[0017] The beneficial effect of adopting the above-mentioned further technical solution is that air bag sampling can be completed by connecting the vacuum box air bag sampler to the air outlet of the pretreatment device.

[0018] Furthermore, the sampling device includes: a sampling cylinder and a booster pump, one end of the booster pump being connected to the condensate removal device via a pipeline, and the sampling cylinder being connected to the other end of the booster pump via a pipeline.

[0019] The beneficial effect of adopting the above-mentioned further technical solution is that the gas cylinder sampling device pressurizes the pre-treated gas and injects it into the gas cylinder through a booster pump.

[0020] Furthermore, a flow control module is provided on the pipeline between the booster pump and the condensate removal device. A first solenoid valve and a second solenoid valve are connected to the pipeline between the booster pump and the sampling cylinder. One end of the first solenoid valve is connected to the pipeline between the booster pump and the sampling cylinder, and the other end of the first solenoid valve is used for venting. The second solenoid valve is installed on the pipeline between the booster pump and the sampling cylinder. A pressure monitoring module is provided on the pipeline between the second solenoid valve and the booster pump.

[0021] The beneficial effects of adopting the above-mentioned further technical solution are: before injecting into the gas cylinder, the instrument can switch the pipeline through the solenoid valve to clean the pipeline first. After cleaning, it automatically switches to pressurizing the gas cylinder. When the pressure monitoring detects that the gas cylinder pressure has reached the set pressure, the instrument stops sampling.

[0022] Furthermore, an analyzer is connected to the pipeline between the booster pump and the sampling cylinder.

[0023] The beneficial effect of adopting the above-mentioned further technical solution is that the analyzer is used for analysis.

[0024] The advantages of this invention in its additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 This is one of the structural schematic diagrams of a gas collection device for water-networked areas provided in an embodiment of this utility model.

[0026] Figure 2 The second schematic diagram of the gas collection device in a water network area provided in this embodiment of the utility model.

[0027] Figure 3 The third schematic diagram of the gas collection device in a water network area provided in this embodiment of the utility model.

[0028] Figure 4 The fourth schematic diagram of the gas collection device in a water network area provided in this embodiment of the present invention.

[0029] The reference numerals in the attached diagram are as follows: 1. Gas collection hood; 2. Condensation and dehydration device; 3. Detector; 4. Sampling device; 5. Filter device; 6. Telescopic sampling handle; 7. One-way valve; 8. Gas bag sampler; 9. Sampling cylinder; 10. Booster pump; 11. Flow control module; 12. First solenoid valve; 13. Second solenoid valve; 14. Analyzer; 15. Pressure monitoring module. Detailed Implementation

[0030] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0031] like Figures 1 to 4 As shown in the figure, this utility model embodiment provides a gas collection device for a water network area, including: a gas collection hood 1, a condensation and dehydration device 2, a detector 3, and a sampling device 4. One end of the condensation and dehydration device 2 is connected to the gas collection hood 1 through a pipeline, the sampling device 4 is connected to the other end of the condensation and dehydration device 2 through a pipeline, and the detector 3 is connected to the gas collection hood 1 through a pipeline.

[0032] The beneficial effects of adopting this utility model's technical solution are as follows: The gas collection hood is used to collect gas. The condensation and dehydration device pre-treats the collected gas, reducing adsorption and achieving water removal. It enables convenient portability of the gas collection device in water-rich areas. During the gas collection process, the collected gas can be pre-judged, improving the purity and efficiency of the collected gas.

[0033] The condensation and dehydration unit outputs cooled, dry gas, and the sampling device is connected to the condensation and dehydration unit via pipeline. The output end of the pretreatment unit's outlet is the same as the gas outlet of the pretreatment unit. The arrows in the diagram represent the gas flow direction and trajectory. Figures 1 to 3 The dashed box in the image represents the pre-processing unit. Figure 4 The dashed box in the image represents the sampling device.

[0034] The gas collection hood can be a cylindrical structure with an opening at the bottom.

[0035] This utility model provides a portable gas collection device for water-rich areas, enabling convenient carrying of such a device. Furthermore, during gas collection, the length of the collector can be extended or retracted, and the gas collection process can be pre-judged, improving the purity and efficiency of the collected gas.

[0036] By designing a portable device structure, a retractable device, a pre-judgment of collected gas components, an underwater gas collection container, and a gas drying device, the gas collection device in water network areas can be conveniently carried, improving the purity and efficiency of the collected gas.

[0037] like Figures 1 to 4 As shown, a filter device 5 is further provided on the pipeline between the condensate removal device 2 and the gas collection hood 1.

[0038] The beneficial effects of adopting the above-mentioned further technical solution are: the filtration device is used to collect and filter the gas, thereby improving the purity and efficiency of the collected gas and increasing the accuracy.

[0039] like Figures 1 to 4 As shown, the filtration device 5 is a particulate matter filtration device, and the detector 3 is a combustible gas detector.

[0040] The beneficial effects of adopting the above-mentioned further technical solution are: the particulate matter filtration device is used to collect and filter the gas; and the combustible gas detector can pre-judge the collected gas.

[0041] like Figures 1 to 4 As shown, a telescopic sampling handle 6 is further provided on the pipeline between the condensation and dehydration device 2 and the gas collection hood 1.

[0042] The beneficial effects of adopting the above-mentioned further technical solution are: during the gas collection process, the length of the collector can be extended or retracted to adjust different distances. This facilitates immersing the gas collection hood or placing it above the water body at the sampling point using the sampling handle with a telescopic function.

[0043] In the drainage method mode, the free end of the pipes of the detector 3 and the telescopic sampling handle 6 is connected to the top of the gas collection hood, which contains water.

[0044] In the air purging method mode, the free end of the pipes of the detector 3 and the telescopic sampling handle 6 is connected to the bottom of the gas collection hood, and the gas collection hood contains air.

[0045] like Figures 1 to 4 As shown, the top of the gas collection hood 1 is further connected to a one-way valve 7 via a pipeline.

[0046] The beneficial effects of adopting the above-mentioned further technical solution are: the one-way valve is set so that it will automatically open when the gas in the gas collection hood is too large and automatically close when the pressure in the gas collection hood is too low, so as to prevent the collection of external gas and maintain the stability of the gas collection hood.

[0047] like Figures 1 to 4 As shown, the sampling device 4 is further described as an air bag sampler 8, which is connected to the other end of the condensate removal device 2 via a pipeline.

[0048] The beneficial effect of adopting the above-mentioned further technical solution is that air bag sampling can be completed by connecting the vacuum box air bag sampler to the air outlet of the pretreatment device.

[0049] Furthermore, the air bag sampler 8 is a ZR-3521 type vacuum box air bag sampler.

[0050] The beneficial effect of adopting the above-mentioned further technical solution is that air bag sampling can be completed by connecting the vacuum box air bag sampler to the air outlet of the pretreatment device.

[0051] like Figures 1 to 4As shown, the sampling device 4 further includes: a sampling cylinder 9 and a booster pump 10. One end of the booster pump 10 is connected to the condensate removal device 2 through a pipeline, and the sampling cylinder 9 is connected to the other end of the booster pump 10 through a pipeline.

[0052] The beneficial effect of adopting the above-mentioned further technical solution is that the gas cylinder sampling device pressurizes the pre-treated gas and injects it into the gas cylinder through a booster pump.

[0053] like Figures 1 to 4 As shown, further, a flow control module 11 is provided on the pipeline between the booster pump 10 and the condensate removal device 2. A first solenoid valve 12 and a second solenoid valve 13 are connected to the pipeline between the booster pump 10 and the sampling cylinder 9. One end of the first solenoid valve 12 is connected to the pipeline between the booster pump 10 and the sampling cylinder 9, and the other end of the first solenoid valve 12 is used for venting. The second solenoid valve 13 is installed on the pipeline between the booster pump 10 and the sampling cylinder 9. A pressure monitoring module 15 is provided on the pipeline between the second solenoid valve 13 and the booster pump 10.

[0054] The beneficial effects of adopting the above-mentioned further technical solution are: before injecting into the gas cylinder, the instrument can switch the pipeline through the solenoid valve to clean the pipeline first. After cleaning, it automatically switches to pressurizing the gas cylinder. When the pressure monitoring detects that the gas cylinder pressure has reached the set pressure, the instrument stops sampling.

[0055] like Figures 1 to 4 As shown, further, an analyzer 14 is connected to the pipeline between the booster pump 10 and the sampling cylinder 9.

[0056] The beneficial effect of adopting the above-mentioned further technical solution is that the analyzer is used for analysis.

[0057] The analyzer 14 can monitor the pressure of the sampling cylinder. When the pressure of the cylinder reaches the set pressure (0.1-0.3 MPa), the instrument (sampling device) stops sampling. The analyzer 14 can be a portable analytical instrument, and the model can be GC-FID.

[0058] The booster pump 10, flow control module 11, first solenoid valve 12, second solenoid valve 13, analyzer 14, and pressure monitoring module 15 can all be connected to the controller. The control method of the controller is existing technology, and those skilled in the art can easily conceive of how to program the controller according to actual needs, so it will not be described in detail here.

[0059] The gas collection device for water-rich areas provided in this embodiment mainly consists of three parts: a pretreatment device, a gas bag sampling device, and a gas cylinder sampling device. The gas bag sampling device and the gas cylinder sampling device can be connected to the pretreatment device simultaneously or selectively.

[0060] 1. The device includes a gas collection hood, a one-way valve, a telescopic sampling handle, a particulate matter filter (filter), and a condensate removal device.

[0061] 2. There are two methods for collecting gases in water-rich areas: ① Discharge method: The collector is submerged in water and moved to the bubbling area of ​​the water-rich area to collect the underwater gas. ② Air displacement method: Since the main component of combustible gas is methane, with a molecular weight of 16, the downward air displacement method is used to collect the underwater gas. When using the air displacement method, the combustible gas detector (detector) line needs to be turned on to make a preliminary judgment on the gas collected in the gas collection hood. If the methane concentration in the combustible gas detector (detector) remains unchanged, it is considered that the air in the gas collection bottle (gas collection hood) has been completely purged.

[0062] ① Drainage method

[0063] like Figure 2 As shown, the drainage method for gas collection consists of five parts: a gas collection hood to collect the gas; a filter and collection device to filter the collected gas; a retractable support (telescopic sampling handle) to adjust the distance; a one-way valve that automatically opens when the gas level inside the collection hood is too high and automatically closes when the pressure inside the collection hood is too low, preventing the collection of external gas and maintaining the stability of the collection hood; and a gas collection pipe connected to a combustible gas detector.

[0064] The sampling method involves placing the pipes of both the detector 3 and the telescopic sampling handle 6 on top of the gas collection hood. Specifically, the free ends of the pipes of the detector 3 and the telescopic sampling handle 6 are connected to the top of the gas collection hood. The gas collection hood is then filled with water, and the telescopic support (telescopic sampling handle 6) is used to move it to the point where bubbles emerge. First, the combustible gas detector (detector) is used to check if the gas is combustible. If it is, the telescopic sampling handle is then opened to collect the gas.

[0065] ② Air removal method

[0066] like Figure 3 As shown, the exhaust gas collection system consists of five parts: a gas collection hood for collecting gas; a filter and collection device for filtering the collected gas; a retractable support (telescopic sampling handle) for adjusting different distances; a one-way valve that automatically opens when the gas level inside the hood is too high and automatically closes when the pressure inside the hood is too low, preventing the collection of external gas and maintaining the stability of the hood; and a gas collection pipe connected to a combustible gas detector.

[0067] The sampling method involves placing the pipes of both the detector 3 and the telescopic sampling handle 6 at the bottom of the gas collection hood, specifically connecting the free ends of the pipes of the detector 3 and the telescopic sampling handle 6 to the bottom of the gas collection hood. Then, the telescopic support (telescopic sampling handle) is moved to the point where the bubbles emerge. First, the combustible gas detector (detector) is used to check if the gas is combustible. If it is, the detector is used continuously until the concentration of the combustible gas stops increasing. Then, the telescopic sampling handle is opened to collect the gas.

[0068] The general procedure involves immersing or placing the gas collection hood above the water body at the sampling point using a telescopic sampling handle (telescopic sampling handle). Different sizes (large, medium, small, etc.) of the gas collection hood can be selected according to site conditions. The hood has a one-way valve to discharge excess gas. It automatically closes when the pressure inside the hood is too low to prevent the collection of external gas. The sample gas exiting the outlet first passes through a filter, and then through a condensation and dehydration device for pretreatment. This condensation and dehydration process, compared to other filter drying materials, reduces adsorption and removes moisture.

[0069] Sampling devices on-site can be divided into two types: gas bag sampling and gas cylinder sampling. Select the appropriate sampling device according to your needs.

[0070] Gas bag sampling: The ZR-3521 vacuum chamber gas bag sampler (explosion-proof model) can be used. It can hold gas bags with a capacity of (1-4)L and features explosion-proof design, automatic cleaning of pipelines and gas bags, automatic end of sampling, and easy portability. Simply connect the vacuum chamber gas bag sampler to the air outlet of the pretreatment device to complete the gas bag sampling.

[0071] Gas cylinder sampling: The gas cylinder sampling device pressurizes the pre-treated gas and injects it into the gas cylinder (sampling cylinder) through a booster pump. Before injecting the gas into the cylinder, the instrument can switch the pipeline through a solenoid valve to clean the pipeline first. After cleaning, it automatically switches to pressurizing the gas cylinder. When the pressure monitoring detects that the gas cylinder pressure reaches the set pressure (0.1-0.3MPa), the instrument stops sampling.

[0072] 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. A gas collection device for water-rich areas, characterized in that, include: The system includes a gas collection hood, a condensation removal device, a detector, and a sampling device. One end of the condensation removal device is connected to the gas collection hood via a pipeline, the sampling device is connected to the other end of the condensation removal device via a pipeline, and the detector is connected to the gas collection hood via a pipeline.

2. A gas collection device for water-rich areas according to claim 1, characterized in that, A filter device is installed on the pipeline between the condensate removal device and the gas collection hood.

3. A gas collection device for water-rich areas according to claim 2, characterized in that, The filtration device is a particulate matter filtration device, and the detector is a combustible gas detector.

4. A gas collection device for water-rich areas according to claim 1, characterized in that, A telescopic sampling handle is provided on the pipeline between the condensation and dehydration device and the gas collection hood.

5. A gas collection device for water-rich areas according to claim 1, characterized in that, The top of the gas collection hood is connected to a one-way valve via a pipeline.

6. A gas collection device for water-rich areas according to claim 1, characterized in that, The sampling device is a gas bag sampler, which is connected to the other end of the condensate removal device via a pipeline.

7. A gas collection device for a water network area according to claim 6, characterized in that, The air bag sampler is a ZR-3521 type vacuum box air bag sampler.

8. A gas collection device for water-rich areas according to claim 1, characterized in that, The sampling device includes a sampling cylinder and a booster pump. One end of the booster pump is connected to the condensate removal device via a pipeline, and the sampling cylinder is connected to the other end of the booster pump via a pipeline.

9. A gas collection device for a water-rich area according to claim 8, characterized in that, A flow control module is provided on the pipeline between the booster pump and the condensate removal device. A first solenoid valve and a second solenoid valve are connected to the pipeline between the booster pump and the sampling cylinder. One end of the first solenoid valve is connected to the pipeline between the booster pump and the sampling cylinder, and the other end of the first solenoid valve is used for venting. The second solenoid valve is installed on the pipeline between the booster pump and the sampling cylinder. A pressure monitoring module is provided on the pipeline between the second solenoid valve and the booster pump.

10. A gas collection device for a water network area according to claim 8, characterized in that, An analyzer is connected to the pipeline between the booster pump and the sampling cylinder.

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