Methane emission sampling device with mechanical joint
By designing a mechanical joint methane emission sampling device using split-flap design and magnetic splicing, the problem of methane leakage detection in non-direct positions of low-pressure pipelines is solved, and the rapid and accurate collection and detection of methane leakage gases at mechanical joints of different pipe diameters and shapes is achieved.
Patent Information
- Application Number
- CN202421480550.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The prior art is difficult to effectively detect and collect methane leakage in low-pressure pipelines at non-direct positions such as valve connections and tee connections. Especially the leakage phenomenon at these positions cannot be captured by commonly used detection equipment.
A mechanical joint methane emission sampling device is designed, adopting a split-flap design and magnetic splicing method, the leakage is wrapped through a T-shaped wrapping shell and a sponge filling layer, and the leakage gas is gathered and extracted by using an air collecting cavity and a pump to conduct gas analysis to determine methane emission.
The device can quickly and accurately collect methane leakage gas at mechanical joints of different pipe diameters and shapes. It is suitable for complex pipeline installation environments, including underground and narrow environments, and realizes effective detection of methane leakage in low-pressure pipelines.
Smart Images
Figure CN222964966U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of natural gas detection, and particularly relates to a mechanical joint methane emission sampling device. Background Art
[0002] Natural gas refers to all gases naturally existing in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere. It is an excellent fuel and chemical raw material, mainly composed of methane (85%), a small amount of ethane (9%), propane (3%), nitrogen (2%), and butane (1%). After natural gas is taken from underground, it is often transported by pipelines. After being transported to a gas station for treatment, it is then transported to factories or cities through pipelines as fuel. During the transportation of natural gas through pipelines, as the service life increases, the pipelines are prone to damage, resulting in natural gas leakage, especially at the mechanical joints of the pipelines. Existing pipeline leaks are generally detected by detection devices such as infrared thermal imaging. However, after detecting the leakage location, it is necessary to further determine the leakage amount to facilitate subsequent treatment of the pipeline leakage. Especially for low-pressure pipelines, due to their low pressure, natural gas shows a seepage phenomenon, and common detection equipment cannot detect the emissions of natural gas (methane) at the seepage points, which is not conducive to subsequent treatment by staff. Especially at non-straight-through positions such as valve connections and tee connections, the collection of seeping natural gas.
[0003] Therefore, designing a mechanical joint methane emission sampling device that can collect methane at the seepage points of low-pressure pipelines, especially at non-straight-through positions such as valve connections and tee connections, to collect seeping natural gas is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a mechanical joint methane emission sampling device, which adopts a split design and magnetic adsorption splicing method to wrap the pipeline leakage point, and then converges and collects seeping natural gas at the top. It has a wide range of applications and can be applied to pipelines with different diameters, and can also be applied to different-shaped mechanical joints such as tees, valves, and elbows.
[0005] The utility model is realized as follows:
[0006] The utility model provides a mechanical joint methane emission sampling device, which includes two relatively arranged T-shaped wrapping shells. The two T-shaped wrapping shells are magnetically connected. A sponge filling layer is arranged inside the T-shaped wrapping shell, and the sponge filling layer is fixedly connected to the inner wall of the T-shaped wrapping shell. A gas collection cavity is arranged at the upper part of the T-shaped wrapping shell. A gas collection nozzle is arranged at the upper part of the T-shaped wrapping shell. The gas collection nozzle is communicated with the gas collection cavity, and a gas collection joint is connected to the gas collection nozzle.
[0007] Further, the connecting surfaces of the two T-shaped wrapping shells are provided with matching magnets.
[0008] It should be particularly noted that the magnets on the connecting surfaces of the two T-shaped wrapping shells are opposite-sex magnets, which can be attracted to each other when approaching. Multiple magnets can be provided and evenly fixed on the connecting surfaces of the two T-shaped wrapping shells.
[0009] Further, the connecting surfaces of the two T-shaped wrapping shells are provided with matching card slots and protrusions.
[0010] It should be particularly noted that the card slots and the protrusions are mutually adapted, and the protrusions are snapped into the card slots, making it easier to position and fix the connecting surfaces of the two T-shaped wrapping shells, and the connection is tighter.
[0011] Further, it further includes a sealing cover, and the sealing cover is adapted to the end of the T-shaped wrapping shell.
[0012] It should be particularly noted that the sealing cover is used to block the end surface when there is no external pipeline at this end surface.
[0013] Further, a pipeline through hole is provided in the middle of the sponge filling layer.
[0014] Further, the gas collecting nozzle is arranged on one of the T-shaped wrapping shells.
[0015] Further, the gas collecting nozzle includes two relatively arranged gas collecting semi-tubes, and the two gas collecting semi-tubes are magnetically connected.
[0016] Further, the gas collecting nozzle is threadedly connected to the gas collecting joint.
[0017] Further, the gas collecting joint is connected to an air extraction pump.
[0018] It should be particularly noted that one end of the air extraction pump is connected to the gas collecting joint, and the other end can be connected to a gas analyzer, and the collected gas is directly analyzed by the gas analyzer.
[0019] The beneficial effects of the present utility model are as follows:
[0020] 1. The mechanical joint methane emission sampling device of the present utility model adopts a split design and a magnetic attraction splicing method, making it convenient to wrap the pipeline leakage point, and at the same time, the connection is quick to disassemble and assemble, and it can be well applied to complex pipeline installation environments, and can be used in underground and narrow environments;
[0021] 2. The design of filling the sponge filling layer inside the T-shaped wrapping shell makes it have a certain sealing performance, which can reduce the leakage of leaked gas, and it can be applied to pipelines of different diameters, and at the same time, it can be applied to mechanical joints of different shapes such as tees, valves, elbows, etc.;
[0022] 3. After wrapping the leakage point of the mechanical joint of the pipeline, the leakage gas is collected and extracted by an air extraction pump. The ambient air enters the sponge structure of the T-shaped wrapping housing through three ports, entraining the leaked methane from the mechanical joint, and gathering into the gas collection cavity to form the sampled gas, which enters the gas analyzer through the air extraction pump, and thus the collection operation can be completed. Description of the Drawings
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.
[0024] Figure 1 Schematic perspective view of the sampling device of the present invention;
[0025] Figure 2 Schematic structural view of the sampling device of the present invention during use;
[0026] Figure 3 Side view of the structure of the first embodiment of the sampling device of the present invention;
[0027] Figure 4 Side view of the structure of the second embodiment of the sampling device of the present invention;
[0028] Figure 5 Side view of the structure of the third embodiment of the sampling device of the present invention;
[0029] Reference numerals: 1, T-shaped wrapping housing; 2, sponge filling layer; 3, gas collection cavity; 4, gas collection nozzle; 5, gas collection joint; 6, magnet; 7, card slot; 8, protrusion; 9, sealing cover; 10, target test joint. Detailed Embodiments
[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.
[0031] Accordingly, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0032] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0033] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0034] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0035] As Figures 1-5 shown: A specific implementation manner of a mechanical joint methane emission sampling device of the present utility model:
[0036] Embodiment 1: As Figures 1-3 shown, a mechanical joint methane emission sampling device is disclosed, including two relatively arranged T-shaped wrapping shells 1. The two T-shaped wrapping shells 1 are magnetically connected. A sponge filling layer 2 is arranged inside the T-shaped wrapping shell 1, and the sponge filling layer 2 is fixedly connected to the inner wall of the T-shaped wrapping shell 1. A gas collection cavity 3 is arranged at the upper part of the T-shaped wrapping shell 1, and a gas collection nozzle 4 is arranged at the upper part of the T-shaped wrapping shell 1. The gas collection nozzle is communicated with the gas collection cavity, and a gas collection joint 5 is connected to the gas collection nozzle 4.
[0037] The connection surfaces of the two T-shaped wrapping shells 1 are provided with matching magnets 6. The magnets 6 on the connection surfaces of the two T-shaped wrapping shells 1 are opposite-sex magnets 6, which can be attracted when approaching each other. Multiple magnets 6 can be arranged and evenly fixed on the connection surfaces of the two T-shaped wrapping shells 1. The magnets 6 can be multiple block-shaped magnets 6 or strip-shaped magnets 6, and the strip-shaped magnets 6 are arranged along the connection surface of the T-shaped wrapping shell 1.
[0038] It also includes a sealing cover 9 which is adapted to the end of the T-shaped wrapping housing 1. It should be particularly noted that the sealing cover 9 is used to seal the end face when there is no external pipeline at the end face. For example, when wrapping a straight-through pipeline, there is no external pipeline at the lower end face, so the sealing cover 9 is needed to seal it.
[0039] The gas collecting nozzle 4 includes two relatively arranged gas collecting semi-circular pipes, and the two gas collecting semi-circular pipes are magnetically connected. That is, the gas collecting nozzle 4 has a similar structure to the T-shaped wrapping housing 1, both are two semi-circular structures, and are docked by magnetic attraction. Each T-shaped wrapping housing 1 corresponds to half of the gas collecting nozzle 4. When the two T-shaped wrapping housings 1 are docked, the gas collecting nozzle 4 is also docked.
[0040] The gas collecting nozzle 4 is threadedly connected to the gas collecting joint 5. After the gas collecting nozzle 4 is docked, the gas collecting joint 5 is screwed onto the gas collecting nozzle 4 by threading, which can not only complete the docking of the gas collecting nozzle 4 and the gas collecting joint 5, but also firmly fix the two half gas collecting nozzles 4. For the two half-shaped gas collecting nozzles 4, matching slots 7 and protrusions 8 can also be provided on the docking surface to improve the sealing performance.
[0041] The gas collecting joint 5 is connected to an air extraction pump. It should be particularly noted that one end of the air extraction pump is connected to the gas collecting joint 5, and the other end can be connected to a gas analyzer, and the collected gas is directly analyzed by the gas analyzer. The design of the gas collecting cavity 3 can prevent damage to the soft sponge body when the air extraction pump has a large air extraction force.
[0042] The mechanical joint methane emission sampling device of the present utility model adopts a split design and magnetic attraction splicing method, making it convenient to wrap the pipeline leakage point. At the same time, the connection is quick and easy to disassemble, and it can be well applied to complex pipeline installation environments, and can be used in underground and narrow environments; the design of filling the sponge filling layer 2 inside the T-shaped wrapping housing 1 makes it have a certain sealing performance, which can reduce the leakage of leaked gas, and it can be applied to pipelines of different diameters, and can also be applied to mechanical joints of different shapes such as tees, valves, elbows, etc.; after the leakage point of the mechanical joint of the pipeline is wrapped, the leaked gas is converged and extracted by the air extraction pump, and the ambient air enters the sponge structure of the T-shaped wrapping housing 1 through three ports, entraining the leaked natural gas of the mechanical joint, and gathering into the gas collecting cavity 3 to form sampling gas, which enters the gas analyzer through the air extraction pump, and then the collection operation can be completed.
[0043] The working principle of the present utility model is as follows: taking a tee joint as an example,
[0044] ① Cover and wrap the two T-shaped wrapping housings 1 of the sampling device on the target test 10 joint and magnetically splice them, and install the gas collecting joint 5 on the gas collecting nozzle 4;
[0045] ②The upper end of the gas collecting joint 5 is connected to an air extraction pump, and a methane gas analyzer is connected after the pump;
[0046] ③When starting sampling, the ambient air enters the sponge filling layer 2 of the T-shaped wrapping housing 1 through three ports, entraining the leaked natural gas from the mechanical joint, and converging into the gas collecting cavity 3 to form sampled gas, which enters the gas analyzer through the air extraction pump;
[0047] ④According to the methane gas concentration detected by gas analysis and the air extraction flow rate of the air extraction pump, the methane emission amount of the test joint can be obtained.
[0048] The sampling method of the mechanical joint methane emission sampling device for elbows, straight joints, valves and other mechanical joints is the same. One end without an outward pipeline can be blocked by a sealing cover 9. Figure 2 The arrow direction in the figure is the gas flow direction.
[0049] Embodiment 2, as Figure 4 shown, on the basis of Embodiment 1, the connecting surfaces of the two T-shaped wrapping housings 1 are provided with adapted clamping grooves 7 and protrusions 8.
[0050] It should be particularly noted that the clamping groove 7 and the protrusion 8 are adapted to each other, and the protrusion 8 is snapped into the clamping groove 7, making it easier to position and fix the connecting surfaces of the two T-shaped wrapping housings 1, and the connection is tighter.
[0051] Embodiment 3, as Figure 5 shown, the gas collecting nozzle 4 described in the embodiment is arranged on one of the T-shaped wrapping housings 1. The gas collecting nozzle 4 adopts an integral design and is fixedly installed on one of the T-shaped wrapping housings 1, without the need for splicing when the two T-shaped wrapping housings 1 are butted. Its sealing performance is ensured.
[0052] It should be particularly noted that a pipeline through hole is provided in the middle of the sponge filling layer 2, which is convenient for quickly adapting and docking with the pipeline shape when the T-shaped wrapping housing 1 is clamped to wrap the pipeline. Of course, the sponge filling layer 2 can also fill the T-shaped wrapping housing 1.
[0053] The mechanical joint methane emission sampling device of the present utility model adopts a split design and a magnetic attraction splicing method to wrap the pipeline leakage point, and converges and collects the leaked natural gas at the top. It has a wide application range, can be applied to pipelines with different diameters, and can also be applied to different-shaped mechanical joints such as tees, valves, and elbows. Combined with an air extraction pump and a gas analyzer, the air extraction pump extracts the leaked gas. According to the methane gas concentration detected by the gas analyzer and the air extraction flow rate of the air extraction pump, the methane emission amount of the test joint can be obtained, and the methane emission amount detection of the leakage point is completed.
[0054] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. Mechanical joint methane emission sampling device, characterized by: The invention comprises two T-shaped wrapping shells (1) arranged opposite to each other, wherein the two T-shaped wrapping shells (1) are connected by magnetic attraction, a sponge filling layer (2) is arranged inside the T-shaped wrapping shell (1), and the sponge filling layer (2) is fixedly connected to the inner wall of the T-shaped wrapping shell (1), and a gas collecting cavity (3) is arranged on the upper part of the T-shaped wrapping shell (1), and a gas collecting nozzle (4) is arranged on the upper part of the T-shaped wrapping shell (1), and the gas collecting nozzle is connected to the collecting cavity, and a gas collecting joint (5) is connected to the gas collecting nozzle (4).
2. The mechanical joint methane emission sampling device according to claim 1 is characterized in that: The connecting surfaces of the two T-shaped wrapping shells (1) are provided with matching magnets (6).
3. The mechanical joint methane emission sampling device according to claim 1 is characterized in that: The connection surfaces of the two T-shaped wrapping shells (1) are provided with matching slots (7) and protrusions (8).
4. The mechanical joint methane emission sampling device according to claim 1 is characterized in that: It also comprises a sealing cover (9), wherein the sealing cover (9) is adapted to the end of the T-shaped wrapping shell (1).
5. The mechanical joint methane emission sampling device according to claim 1 is characterized in that: A pipeline through hole is provided in the middle of the sponge filling layer (2).
6. The mechanical joint methane emission sampling device according to claim 1 is characterized in that: The gas collecting nozzle (4) is arranged on one of the T-shaped wrapping shells (1).
7. The mechanical joint methane emission sampling device according to claim 1 is characterized in that: The gas collecting nozzle (4) comprises two gas collecting semicircular tubes arranged opposite to each other, and the two gas collecting semicircular tubes are connected by magnetic attraction.
8. The mechanical joint methane emission sampling device according to claim 1 is characterized in that: The gas collecting nozzle (4) is threadedly connected to the gas collecting joint (5).
9. The mechanical joint methane emission sampling device according to claim 1, characterized in that: The gas collecting joint (5) is connected to a gas extraction pump.