A natural gas sampling structure for use inside a pipeline

Abstract

The utility model discloses a kind of natural gas sampling structure for pipeline inside, it is related to natural gas detection technical field, comprising: the clamp assembly being arranged at the outside of pipeline;The nipple is arranged on the outer wall of one side of pipeline, nipple is at least used to discharge natural gas inside pipeline, sampling cylinder is fixedly installed in the top of clamp assembly, sampling cylinder is sleeved in the outside of nipple, and sampling cylinder is communicated with nipple;It further includes connector, the outer wall of one side of connector is provided with gas pipe connected with gas storage tank, and connector is inserted in the inside of sampling cylinder to realize intercommunication with pipeline inside.The nipple used, with detachable structure, is fixed on the outside of pipeline, to realize the export of natural gas inside pipeline, while the opening and closing mechanism arranged in the inside of sampling cylinder, can be opened when using connector to sample natural gas, in non-use period, it is normally closed, ensure that natural gas does not leak, also conducive to the replacement of the structure.

Description

Technical Field

[0001] This utility model relates to the field of natural gas detection technology, specifically a natural gas sampling structure for use inside pipelines. Background Technology

[0002] Natural gas, whose main component is methane, is colorless, odorless, non-toxic, and non-corrosive. During the production and transportation of natural gas, samplers are needed to take samples and test them to ensure the quality of the natural gas.

[0003] When sampling natural gas inside pipelines, since the pipelines are closed systems, openings need to be made and valves installed to facilitate sampling. However, traditional manual valve structures are prone to rusting when exposed to air for extended periods when sampling is not required, making valve opening difficult and increasing the risk of natural gas leakage. Therefore, we propose a new natural gas sampling structure for pipelines. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a natural gas sampling structure for use inside pipelines, solving the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a natural gas sampling structure for use inside a pipeline, comprising: a clamp assembly disposed outside the pipeline; a nipple disposed on one side of the outer wall of the pipeline, the nipple being used at least to discharge natural gas from inside the pipeline; a sampling cylinder fixedly installed above the clamp assembly, the sampling cylinder being sleeved outside the nipple, and the sampling cylinder being connected to the nipple; It also includes a connector, on one outer wall of which is provided a gas supply pipe that is connected to the gas storage tank. The connector is inserted into the inside of the sampling tube to achieve communication with the inside of the pipeline. A sealing plug is inserted inside the top of the sampling tube, and an opening and closing mechanism is provided inside the sampling tube. The opening and closing mechanism is used to seal the sampling tube and the nipple.

[0006] Preferably, the clamp assembly includes a second clamping ring located below the pipe and a first clamping ring located above the pipe. The outer walls of the first and second clamping rings are provided with lugs, and a fixing bolt is provided between the upper and lower lugs.

[0007] Preferably, the bottom end of the sampling tube is fixed to the top outer wall of the retaining ring, and the internal space is connected to the through hole above the retaining ring.

[0008] Preferably, the nipple has a cone at its tip and a threaded portion on its outer surface, and the nipple is threadedly inserted into a threaded hole in the pipe through the threaded portion.

[0009] Preferably, the connector includes a housing, the bottom end of which is provided with an insertion head that is inserted into the top of the sampling cylinder, the inside of the housing is provided with a piston plate, the top of the piston plate is fixedly mounted with a push rod, and the top of the push rod is fixed with an operating handle.

[0010] Preferably, the top of the sealing plug is provided with an anti-loss rope, and a fixing ring is fixedly installed on one side of the outer wall of the sampling tube, with one end of the anti-loss rope tied to the fixing ring.

[0011] Preferably, the opening and closing mechanism includes a normally closed plug inserted inside the nipple, a long rod fixedly mounted on the top of the normally closed plug, an integral threaded sleeve at the top of the long rod, a threaded head inserted into the internal thread of the threaded sleeve, an expansion plate fixedly mounted on the top of the threaded head, a contact fixedly mounted on the top of the expansion plate, and a spring located inside the sampling cylinder outside the long rod, with the top of the spring located below the expansion plate.

[0012] Preferably, a stabilizing ring is provided at the lower interior of the sampling tube, and the stabilizing ring has a hollow structure, and the stabilizing ring is sleeved on the outside of the long rod.

[0013] This utility model provides a natural gas sampling structure for use inside pipelines, which has the following beneficial effects: 1. The nipple used is fixed to the outside of the pipeline with a detachable structure to facilitate the export of natural gas from inside the pipeline. At the same time, the opening and closing mechanism set inside the sampling tube can be opened when the connector is used to sample natural gas, and is normally closed when not in use, ensuring that natural gas will not leak and also facilitating the replacement of the structure. 2. By using clamp components, the sampling tube is fastened to the outside of the pipe, and the sampling tube is sleeved on the outside of the nipple, achieving a tight connection between the two, which better realizes the sealing and reliability of the installation. 3. The connector is inserted into the sampling tube. By operating the push rod and operating handle inside the connector, the opening and closing mechanism can be squeezed downwards, opening the opening and closing mechanism inside the sampling tube. This allows natural gas to enter the gas pipeline along the nipple, sampling tube, and connector, and then be transported to the gas storage tank through the gas pipeline, thus efficiently completing the natural gas sampling. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural view of a natural gas sampling structure for use inside a pipeline according to the present invention. Figure 2 This is a cross-sectional view of a natural gas sampling structure for use inside a pipeline according to the present invention. Figure 3This is a schematic diagram of the connector and gas transmission pipe structure of a natural gas sampling structure for use inside a pipeline according to the present invention. Figure 4 This is a cross-sectional view of a connector structure for a natural gas sampling structure inside a pipeline according to the present invention. Figure 5 This is a schematic diagram of the opening and closing mechanism of a natural gas sampling structure for use inside a pipeline, according to this utility model.

[0015] 1. Pipeline; 2. Clamp assembly; 21. Clamping ring one; 22. Clamping ring two; 23. Ear seat; 24. Fixing bolt; 3. Sampling cylinder; 4. Nipple; 41. Cone; 42. Threaded part; 5. Connector; 51. Housing; 52. Insertion head; 53. Piston plate; 54. Push rod; 55. Operating handle; 6. Gas supply pipe; 7. Sealing plug; 71. Fixing ring; 72. Anti-loss rope; 8. Opening and closing mechanism; 81. Normally closed plug; 82. Long rod; 83. Spring; 84. Threaded sleeve; 85. Extension plate; 86. Threaded head; 87. Contact; 9. Stabilizing ring. Detailed Implementation

[0016] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0017] like Figures 1-5 As shown, this utility model provides a technical solution: a natural gas sampling structure for use inside a pipeline, comprising: a clamp assembly 2 disposed outside the pipeline 1; a nipple 4 disposed on one side of the outer wall of the pipeline 1, the nipple 4 being used at least to discharge natural gas inside the pipeline 1; a sampling cylinder 3 fixedly installed above the clamp assembly 2, the sampling cylinder 3 being sleeved outside the nipple 4, and the sampling cylinder 3 being connected to the nipple 4; a connector 5 is also included, a gas transmission pipe 6 connected to a gas storage tank is disposed on one side of the outer wall of the connector 5, the connector 5 is inserted into the inside of the sampling cylinder 3 to achieve communication with the inside of the pipeline 1; a sealing plug 7 is inserted into the top of the sampling cylinder 3, and an opening and closing mechanism 8 is disposed inside the sampling cylinder 3, the opening and closing mechanism 8 being used at least to seal the sampling cylinder 3 and the nipple 4.

[0018] In this embodiment, a clamp assembly 2 is provided outside the pipe 1. The clamp assembly 2 includes a second clamp ring 22 located below the pipe 1 and a first clamp ring 21 located above the pipe 1. Ear seats 23 are provided on the outer walls of the first clamp ring 21 and the second clamp ring 22. A fixing bolt 24 is provided between the upper and lower ear seats 23. The bottom end of the sampling cylinder 3 is fixed on the top outer wall of the first clamp ring 21, and the internal space is connected to the through hole above the first clamp ring 21. The clamp assembly 2 is used to install and fix the sampling cylinder 3 on the pipe 1 and the nipple 4, so as to facilitate the exhaust of air from the pipe 1, thereby facilitating subsequent sampling.

[0019] In this embodiment, a nipple 4 is provided on one side of the outer wall of the pipeline 1. The nipple 4 is used to discharge natural gas inside the pipeline 1. A sampling cylinder 3 is fixedly installed above the clamp assembly 2. The sampling cylinder 3 is sleeved on the outside of the nipple 4 and is connected to the nipple 4. A cone 41 is provided at the top of the nipple 4. A threaded part 42 is provided on the outer surface of the nipple 4. The nipple 4 is threaded into the threaded hole on the pipeline 1 through the threaded part 42. The threaded connection of the nipple 4 facilitates the disassembly, assembly and replacement of the nipple 4 and avoids corrosion or rust that renders it unusable.

[0020] In this embodiment, a connector 5 is also included. A gas transmission pipe 6 connected to a gas storage tank is provided on one outer wall of the connector 5. The connector 5 is inserted into the inside of the sampling cylinder 3 to achieve communication with the inside of the pipeline 1. The connector 5 includes a housing 51. An insertion head 52 is provided at the bottom of the housing 51 and inserted into the top of the sampling cylinder 3. A piston plate 53 is provided inside the housing 51. A push rod 54 is fixedly installed on the top of the piston plate 53, and an operating handle 55 is fixed at the top of the push rod 54. When natural gas needs to be sampled, the operator inserts the connector 5 into the top of the sampling cylinder 3 and inserts the insertion head 52 into the top of the sampling cylinder 3. Then, one hand holds the housing 51 of the connector 5, and the other hand holds the operating handle 55. The operating handle 55 drives the push rod 54 to descend, which in turn causes the piston plate 53 to move downward inside the sampling cylinder 3, so that the opening and closing mechanism 8 opens and completes the rapid sampling operation. When the connector 5 moves upward, the opening and closing mechanism 8 automatically closes.

[0021] In this embodiment, a sealing plug 7 is inserted into the top of the sampling tube 3, and an anti-loss rope 72 is provided on the top of the sealing plug 7. A fixing ring 71 is fixedly installed on one side of the outer wall of the sampling tube 3. One end of the anti-loss rope 72 is tied to the fixing ring 71. When sampling is not required, the sealing plug 7 can be inserted into the top of the sampling tube 3 to seal the top of the sampling tube 3. The shape and structure of the sealing plug 7 are similar to the structure and shape of the insertion head 52. The anti-loss rope 72 and the fixing ring 71 prevent the sealing plug 7 from being lost.

[0022] In this embodiment, the sampling cylinder 3 is equipped with an opening and closing mechanism 8, which is used to seal at least the sampling cylinder 3 and the nipple 4. The opening and closing mechanism 8 can be opened when using the connector 5 to sample natural gas, and is normally closed when not in use, ensuring that natural gas will not leak and facilitating the replacement of this structure.

[0023] The opening and closing mechanism 8 includes a normally closed plug 81 inserted inside the nipple 4. A long rod 82 is fixedly installed on the top of the normally closed plug 81. An integral threaded sleeve 84 is provided at the top of the long rod 82. A threaded head 86 is threadedly inserted into the inside of the threaded sleeve 84. An extension plate 85 is fixedly installed on the top of the threaded head 86. A contact 87 is fixedly installed on the top of the extension plate 85. A spring 83 is provided outside the long rod 82 and located inside the sampling cylinder 3. The top of the spring 83 is located below the extension plate 85. When the connector 5 is inserted into the sampling cylinder... After entering the interior of 3, the push rod 54 of the operating connector 5 descends, which can drive the contact 87 and the expansion plate 85 to descend using the piston plate 53, and then drive the long rod 82 and the normally closed plug 81 to descend, so that the normally closed plug 81 is pushed downward from the interior of the nipple 4, and the normally closed plug 81 enters the interior of the pipeline 1. At this time, the nipple 4, the sampling cylinder 3 and the connector 5 are in a connected state, and natural gas can be stored in the interior of the gas storage tank through the gas transmission pipe 6, thereby obtaining a sample of natural gas, which is convenient for subsequent natural gas testing.

[0024] Specifically, a stabilizing ring 9 is installed at the bottom of the sampling tube 3. The stabilizing ring 9 has a hollow structure and is sleeved on the outside of the long rod 82. The stabilizing ring 9 provides stable support for the long rod 82, ensuring the straightness of the long rod 82's vertical movement. The hollow structure will not cause blockage to the natural gas transportation and sampling.

Claims

1. A natural gas sampling structure for use inside a pipeline, comprising: A clamp assembly (2) is provided outside the pipe (1); characterized in that: a nipple (4) is provided on one side of the outer wall of the pipe (1), the nipple (4) is used at least to discharge the natural gas inside the pipe (1), a sampling tube (3) is fixedly installed above the clamp assembly (2), the sampling tube (3) is sleeved on the outside of the nipple (4), and the sampling tube (3) is connected to the nipple (4); It also includes a connector (5), on one side of the outer wall of the connector (5) is a gas transmission pipe (6) connected to the gas storage tank. The connector (5) is inserted into the inside of the sampling tube (3) to achieve communication with the inside of the pipeline (1). The sampling tube (3) has a sealing plug (7) inserted inside its top end, and the sampling tube (3) has an opening and closing mechanism (8) inside, which is used to close the sampling tube (3) and the nipple (4).

2. The natural gas sampling structure for use inside a pipeline according to claim 1, characterized in that: The clamp assembly (2) includes a second clamp ring (22) located below the pipe (1) and a first clamp ring (21) located above the pipe (1). Ear seats (23) are provided on the outer walls of the first clamp ring (21) and the second clamp ring (22), and a fixing bolt (24) is provided between the upper and lower ear seats (23).

3. A natural gas sampling structure for use inside a pipeline according to claim 2, characterized in that: The bottom end of the sampling tube (3) is fixed on the top outer wall of the retaining ring (21), and the internal space is connected to the through hole above the retaining ring (21).

4. A natural gas sampling structure for use inside a pipeline according to claim 1, characterized in that: The nipple (4) has a cone (41) at its top end and a threaded part (42) on its outer surface. The nipple (4) is threaded into the threaded hole on the pipe (1) through the threaded part (42).

5. A natural gas sampling structure for use inside a pipeline according to claim 1, characterized in that: The connector (5) includes a housing (51), the bottom end of which is provided with an insertion head (52) that is inserted into the top of the sampling tube (3). The housing (51) is provided with a piston plate (53), the top of which is fixedly mounted with a push rod (54), and the top of the push rod (54) is fixed with an operating handle (55).

6. A natural gas sampling structure for use inside a pipeline according to claim 1, characterized in that: The top of the sealing plug (7) is provided with an anti-loss rope (72), and a fixing ring (71) is fixedly installed on one side of the outer wall of the sampling tube (3). One end of the anti-loss rope (72) is tied to the fixing ring (71).

7. A natural gas sampling structure for use inside a pipeline according to claim 1, characterized in that: The opening and closing mechanism (8) includes a normally closed plug (81) inserted inside the nipple (4). A long rod (82) is fixedly installed on the top of the normally closed plug (81). An integral threaded sleeve (84) is provided at the top of the long rod (82). A threaded head (86) is inserted into the internal thread of the threaded sleeve (84). An extension plate (85) is fixedly installed on the top of the threaded head (86). A contact (87) is fixedly installed on the top of the extension plate (85). A spring (83) located inside the sampling cylinder (3) is provided outside the long rod (82). The top of the spring (83) is located below the extension plate (85).

8. A natural gas sampling structure for use inside a pipeline according to claim 7, characterized in that: A stabilizing ring (9) is provided at the bottom of the inside of the sampling tube (3), and the stabilizing ring (9) has a hollow structure. The stabilizing ring (9) is sleeved on the outside of the long rod (82).

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