Natural gas sampling device for long-distance natural gas pipeline

Abstract

The utility model provides a natural gas sampling device for a long-distance natural gas pipeline, which comprises the following components: a fixing sleeve which is sleeved on the long-distance natural gas pipeline, the upper end of the fixing sleeve is provided with a cylindrical bump, the lower part of the fixing sleeve is provided with a convex cavity, two sides of the upper part of the convex cavity are respectively provided with a gas sampling pipe, and each gas sampling pipe is provided with a plugging valve; the liftable plugging block is positioned right above the sampling port of the long-distance natural gas pipeline; the sampling sleeve is arranged on the peripheral side of the cylindrical bump, and two sides of the sampling sleeve are respectively provided with a sampling cavity; the sampling cavity plugging column is arranged on the outer side of the fixing sleeve in a sleeving manner; the sampling sleeve is sleeved with the protective cap, and the bottom end of the protective cap is in butt joint with the fixed base; and the hoop is arranged at a seam between the fixed base and the protective cap. Through multiple protection of the fixed sleeve, the liftable plugging block, the sampling sleeve, the sampling cavity plugging column, the fixed base, the protective cap and the hoop, the risk of natural gas leakage is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of long-distance natural gas transmission, and in particular relates to a natural gas sampling device for long-distance natural gas pipelines. Background Technology

[0002] Utility model patent application number 202222986953.2 discloses a natural gas pipeline with a natural gas sampling device, including a pipeline with a connecting pipe fixedly connected to its top end. A placement plate is fixedly attached to the bottom side of the connecting pipe, and sampling cylinders are placed on top of the placement plate. The sampling cylinders are located around the connecting pipe, and four sampling cylinders can simultaneously collect four natural gas samples, allowing for more samples to be analyzed and improving the accuracy of the analysis. The sampling cylinders are detachably mounted on the placement plate, and the connecting pipe is connected to the sampling cylinders via a gas guide pipe. A piston plate and a sealing gasket are installed inside the sampling cylinder. After sampling, the sampling cylinder is pulled back, the gas guide pipe is removed, and the piston plate is moved upwards to above the connecting pipe, so that the sampled natural gas is placed between the piston plate and the sealing gasket, maintaining a leak-proof seal. The sampling cylinders are easy to install and remove.

[0003] However, when the gas delivery pipe is pulled out of the connecting pipe, the pressure difference between the cylinder and atmospheric pressure will cause natural gas to leak from the connecting pipe. Moreover, pulling the piston plate up to the top of the connecting pipe will further compress the natural gas, causing the leakage to increase. This not only poses a safety hazard but also makes operation inconvenient. Utility Model Content

[0004] One object of this invention is to provide a natural gas sampling device for long-distance natural gas pipelines, and to provide at least the advantages described below.

[0005] Another objective of this invention is to provide a natural gas sampling device for long-distance natural gas pipelines, which avoids the risk of natural gas leakage through multiple protections including a fixed sleeve, a liftable sealing block, a sampling sleeve, a sampling chamber sealing column, a fixed base, a protective cap, and a clamp.

[0006] The technical solution of this utility model is as follows:

[0007] A natural gas sampling device for long-distance natural gas pipelines includes:

[0008] A fixed sleeve is fitted onto a long-distance natural gas pipeline. The upper end of the fixed sleeve has a cylindrical protrusion, and the lower part of the cylindrical protrusion has a U-shaped cavity. The upper two sides of the U-shaped cavity each have a gas intake pipe, and the gas intake pipe has a sealing valve.

[0009] The liftable sealing block is located at the protruding middle position of the convex cavity and is directly above the sampling port of the long-distance natural gas pipeline;

[0010] A sampling sleeve is disposed on the outer periphery of the cylindrical protrusion, and each side of the sampling sleeve has a sampling cavity corresponding to the sealing valve for installing the sampling tube.

[0011] A sampling chamber sealing column is disposed within the sampling chamber;

[0012] A fixed base is fitted onto the outside of the fixed sleeve and its bottom end is welded to the long-distance natural gas pipeline, while its upper part is welded to the outer side of the sampling sleeve.

[0013] A protective cap is fitted onto the sampling sleeve, and its bottom end is connected to the fixed base;

[0014] And a clamp, which is set at the joint between the fixed base and the protective cap.

[0015] Preferably, in the natural gas sampling device for long-distance natural gas pipelines,

[0016] The sampling port of the long-distance natural gas pipeline has a connecting pipe, the inner diameter of which is larger than the diameter of the liftable sealing block;

[0017] A lifting cylinder is provided at the top of the protruding middle position of the convex cavity, and the output end of the lifting cylinder is vertically downward and connected to the liftable sealing block.

[0018] A silicone sealing baffle is provided at the lower end of the liftable sealing block.

[0019] Preferably, in the natural gas sampling device for long-distance natural gas pipelines,

[0020] A translation cylinder is provided on each side of the bottom end of the convex cavity, and the output end of the translation cylinder is horizontally positioned and faces the sampling port of the long-distance natural gas pipeline.

[0021] The output end of the translation cylinder is provided with a semi-cylindrical sealing plate with an L-shaped cross section. The two semi-cylindrical sealing plates are joined together and attached to the upper surface of the liftable sealing block.

[0022] Preferably, in the natural gas sampling device for long-distance natural gas pipelines,

[0023] The sampling sleeve and the fixing sleeve are provided with a longitudinal protrusion and a longitudinal groove that cooperate with each other;

[0024] The sampling chamber sealing column is threadedly connected to the sampling chamber, and the top of the sampling chamber sealing column has a hand-tightening nut and the bottom has a sealing rubber ring.

[0025] Preferably, in the natural gas sampling device for long-distance natural gas pipelines, multiple sealing rings are provided between the clamp, the fixed base, and the sampling sleeve.

[0026] This utility model has the following beneficial effects:

[0027] The liftable sealing block can descend and seal the connecting pipe after sampling is completed. At the same time, the translation cylinder drives the semi-cylindrical sealing plate to dock and seal on the upper surface of the liftable sealing block, so that the long-distance natural gas pipeline is completely sealed.

[0028] After the sampling tube is removed, the sampling chamber is sealed with a sampling chamber sealing column, and then a protective cap is installed and fixed with clamps to make the entire structure more airtight and prevent natural gas leakage.

[0029] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0030] Figure 1 A schematic diagram of the sampling state structure of an embodiment of the natural gas sampling device for long-distance natural gas pipelines provided by this utility model;

[0031] Figure 2 This is a schematic diagram of the plugging state structure of an embodiment of the natural gas sampling device for long-distance natural gas pipelines provided by this utility model. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0033] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not imply the presence or addition of one or more other elements or combinations thereof.

[0034] like Figure 1 and Figure 2 As shown, this utility model provides a natural gas sampling device for long-distance natural gas pipelines, which includes:

[0035] A fixing sleeve 1 is fitted onto a long-distance natural gas pipeline 2. The upper end of the fixing sleeve 1 has a cylindrical protrusion 101, and the lower part of the cylindrical protrusion 101 has a U-shaped cavity 102. The upper two sides of the U-shaped cavity 102 have a gas intake pipe 103, and the gas intake pipe 103 has a sealing valve 104.

[0036] The liftable sealing block 3 is located at the middle protruding position of the convex cavity 102 and is located directly above the sampling port of the long-distance natural gas pipeline.

[0037] The sampling sleeve 4 is disposed on the outer periphery of the cylindrical protrusion 101, and each side of the sampling sleeve 4 has a sampling cavity 401 corresponding to the sealing valve 104 for installing the sampling tube.

[0038] The sampling chamber sealing column 5 is disposed within the sampling chamber 401;

[0039] A fixed base 6 is sleeved on the outside of the fixed sleeve 1 and its bottom end is welded to the long-distance natural gas pipeline 2, and its upper part is welded to the upper outer side of the sampling sleeve 4.

[0040] The protective cap 7 is fitted onto the sampling sleeve 4, and its bottom end is connected to the fixed base 6.

[0041] And clamp 8, which is set at the joint between the fixed base 6 and the protective cap 7.

[0042] The gas sampling tube protrudes from the fixed sleeve and can be connected to the sampling tube through existing connection methods to achieve sampling connection and disassembly after completion, which will not be described in detail here.

[0043] The fixing sleeve can be made by welding two together on the outside of the long-distance natural gas pipeline, or it can be made by welding it on the outside of the pipeline during the laying process; the fixing base is located on the outside of the fixing sleeve, which further fixes the fixing sleeve and the pipeline together.

[0044] After sampling, the sampling chamber sealing column is installed inside the sampling chamber, followed by the installation of the protective cap. After docking with the fixed base, it is fixed with clamps. This multiple protection significantly improves the sealing of the entire structure and prevents leakage.

[0045] In one embodiment of the natural gas sampling device for long-distance natural gas pipelines provided by this utility model,

[0046] The sampling port of the long-distance natural gas pipeline has a connecting pipe 21, the inner diameter of which is larger than the diameter of the liftable sealing block 3;

[0047] A lifting cylinder 31 is provided at the top of the protruding middle position of the convex cavity 102. The output end of the lifting cylinder 31 is vertically downward and connected to the liftable sealing block 3.

[0048] A silicone sealing baffle is provided at the lower end of the liftable sealing block 3.

[0049] The liftable sealing block can be fully inserted into the connecting pipe, and the silicone sealing baffle can play a sealing role.

[0050] In one embodiment of the natural gas sampling device for long-distance natural gas pipelines provided by this utility model,

[0051] A translation cylinder 105 is respectively provided on both sides of the bottom end of the convex cavity 101. The output end of the translation cylinder 105 is horizontally positioned and faces the sampling port of the long-distance natural gas pipeline.

[0052] The output end of the translation cylinder 105 is provided with a semi-cylindrical sealing plate 106 with an L-shaped cross section. After the two semi-cylindrical sealing plates 106 are joined together, they are attached to the upper surface of the liftable sealing block 3.

[0053] After the two L-shaped semi-cylindrical sealing plates are joined together, the vertical part is in close contact with the outer side of the output end of the lifting cylinder, while the horizontal part is in contact with the upper surface of the lifting sealing block, thus completing the seal.

[0054] In one embodiment of the natural gas sampling device for long-distance natural gas pipelines provided by this utility model,

[0055] The sampling sleeve 4 and the fixing sleeve 1 are provided with a longitudinal protrusion and a longitudinal groove that cooperate with each other;

[0056] The sampling chamber sealing column 5 is threadedly connected to the sampling chamber 401, and the top of the sampling chamber sealing column 5 has a hand-tightening nut and the bottom has a sealing rubber ring.

[0057] The sampling sleeve is fitted onto the outside of the fixed sleeve from top to bottom, making it less prone to displacement; the sampling chamber sealing column is connected to the sampling chamber by threads, and the bottom sealing ring is sealed, so that the sampling chamber sealing column and the sampling chamber are sealed.

[0058] In one embodiment of the natural gas sampling device for long-distance natural gas pipelines provided by this utility model, multiple sealing rings are provided between the clamp 8, the fixed base 6, and the sampling sleeve 4 to provide a final sealing guarantee.

[0059] This utility model provides a natural gas sampling device for long-distance natural gas pipelines. Through multiple protections including a fixed sleeve, a liftable sealing block, a sampling sleeve, a sampling chamber sealing column, a fixed base, a protective cap, and clamps, the risk of natural gas leakage is avoided.

[0060] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A natural gas sampling device for long-distance natural gas pipelines, characterized in that, include: A fixed sleeve is fitted onto a long-distance natural gas pipeline. The upper end of the fixed sleeve has a cylindrical protrusion, and the lower part of the cylindrical protrusion has a U-shaped cavity. The upper two sides of the U-shaped cavity each have a gas intake pipe, and the gas intake pipe has a sealing valve. The liftable sealing block is located at the protruding middle position of the convex cavity and is directly above the sampling port of the long-distance natural gas pipeline; A sampling sleeve is disposed on the outer periphery of the cylindrical protrusion, and each side of the sampling sleeve has a sampling cavity corresponding to the sealing valve for installing the sampling tube. A sampling chamber sealing column is disposed within the sampling chamber; A fixed base is fitted onto the outside of the fixed sleeve and its bottom end is welded to the long-distance natural gas pipeline, while its upper part is welded to the outer side of the sampling sleeve. A protective cap is fitted onto the sampling sleeve, and its bottom end is connected to the fixed base; And a clamp, which is set at the joint between the fixed base and the protective cap.

2. The natural gas sampling device for long-distance natural gas pipelines as described in claim 1, characterized in that, The sampling port of the long-distance natural gas pipeline has a connecting pipe, the inner diameter of which is larger than the diameter of the liftable sealing block; A lifting cylinder is provided at the top of the protruding middle position of the convex cavity, and the output end of the lifting cylinder is vertically downward and connected to the liftable sealing block. A silicone sealing baffle is provided at the lower end of the liftable sealing block.

3. The natural gas sampling device for long-distance natural gas pipelines as described in claim 2, characterized in that, A translation cylinder is provided on each side of the bottom end of the convex cavity, and the output end of the translation cylinder is horizontally positioned and faces the sampling port of the long-distance natural gas pipeline. The output end of the translation cylinder is provided with a semi-cylindrical sealing plate with an L-shaped cross section. The two semi-cylindrical sealing plates are joined together and attached to the upper surface of the liftable sealing block.

4. The natural gas sampling device for long-distance natural gas pipelines as described in claim 3, characterized in that, The sampling sleeve and the fixing sleeve are provided with a longitudinal protrusion and a longitudinal groove that cooperate with each other; The sampling chamber sealing column is threadedly connected to the sampling chamber, and the top of the sampling chamber sealing column has a hand-tightening nut and the bottom has a sealing rubber ring.

5. The natural gas sampling device for long-distance natural gas pipelines as described in claim 4, characterized in that, Multiple sealing rings are provided between the clamp, the fixed base, and the sampling sleeve.

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