Pipeline connecting piece for natural gas detection

Abstract

The utility model discloses a pipeline connecting piece for natural gas detection. According to the technical scheme, the pipeline connecting piece is characterized by comprising a connecting pipe, the valve pipe is fixedly connected to the top of the connecting pipe and is vertically arranged; the valve is arranged on the valve pipe and used for controlling opening and closing of the valve pipe; the sealing plug can be inserted into the top of the valve pipe and is attached to the inner wall of the valve pipe; the gland is fixedly connected to the top of the sealing plug, and when the sealing plug is inserted into the valve pipe, the gland is pressed on the top of the valve pipe; the pressing mechanism is used for pressing the gland at the top of the sealing plug; and a sampling tube; through the arrangement of the pressing mechanism, when sampling is not carried out, the pressing cover is pressed on the top of the valve pipe through the pressing mechanism, and the sealing plug is embedded into the valve pipe, so that sealing of the valve pipe is achieved, external dust is not prone to entering the valve pipe, impurities do not need to be discharged in the sampling process, and the detection precision is not prone to be affected by the impurities.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas detection, and more specifically, to a pipeline connector for natural gas detection. Background Art

[0002] Natural gas is a gaseous fossil fuel mainly composed of methane. It mainly exists in oil fields and natural gas fields, and a small amount is also found in coal seams. Like crude oil, natural gas is buried in closed geological structures underground. Some of it is stored in the same layer as crude oil, and some exists separately.

[0003] In the process of natural gas transportation, in order to ensure the safety of natural gas transportation, it is necessary to regularly test the natural gas at different positions of the transmission pipeline. This requires the installation of a sampling valve on the natural gas transmission pipeline to facilitate the sampling and testing of the natural gas in the pipeline. The existing natural gas sampling valve will accumulate dust on the sampling valve during the period of time when it is not in use. When sampling, it is necessary to discharge the gas for a period of time to clear the dust deposited in the sampling valve before sampling and testing. This leads to low efficiency of sampling and testing, and it is impossible to ensure that dust and impurities can be discharged in a timely and clean manner, which easily affects the accuracy of sampling and testing. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a pipeline connector for natural gas detection, which, through the setting of a clamping mechanism, can press the pressure cover on the top of the valve tube and embed the sealing plug into the valve tube when no sampling is taken, thereby sealing the valve tube and making it difficult for external dust to enter the valve tube, thereby eliminating the need to discharge impurities before sampling and preventing the detection accuracy from being affected by impurities.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pipeline connector for natural gas detection, comprising a connecting pipe, the connecting pipe connecting two adjacent transmission pipelines as a part of the natural gas transmission pipeline;

[0006] A valve pipe, which is fixedly connected to the top of the connecting pipe and is arranged vertically;

[0007] A valve, wherein the valve is arranged on the valve pipe to control the opening and closing of the valve pipe;

[0008] A sealing plug, which can be inserted into the top of the valve tube and fits against the inner wall of the valve tube;

[0009] A gland, which is fixedly connected to the top of the sealing plug and is pressed tightly against the top of the valve tube when the sealing plug is inserted into the valve tube;

[0010] A pressing mechanism, the pressing mechanism is used to press the gland onto the top of the sealing plug;

[0011] And a sampling tube, which can be fixedly connected to the top of the valve tube when the sealing plug is pulled out of the valve tube.

[0012] The utility model is further configured as follows: two pressing plates are fixedly connected to both sides of the pressing cover;

[0013] The clamping mechanism includes a connecting rod, two connecting rods are provided and are vertically arranged, the connecting rod is fixedly connected to the top of the connecting pipe and the two connecting rods are respectively located on both sides of the valve pipe, and the two connecting rods vertically pass through two pressure plates on both sides of the gland;

[0014] And nuts, the two nuts are respectively threadedly connected to the two connecting rods and the two nuts are respectively pressed on the tops of the two pressing plates.

[0015] The utility model is further configured as follows: the inner wall of the valve tube is fixedly connected with a retaining ring located above the valve, and when the gland is pressed tightly against the top of the valve tube, the bottom of the sealing plug contacts the top of the retaining ring.

[0016] The utility model is further configured as follows: two annular grooves are provided on the top of the retaining ring and the bottom of the sealing plug. When the sealing plug is pressed against the top of the retaining ring, the two sealing grooves are aligned. A sealing ring embedded in the annular groove is provided at the bottom of the sealing plug. When the sealing plug is pressed against the top of the retaining ring, the sealing ring is embedded in the two annular grooves at the same time.

[0017] The utility model is further configured as follows: two annular sealing grooves are arranged at the bottom of the gland and the top of the valve tube. When the gland is pressed tightly against the top of the valve tube, the two sealing grooves are aligned. A sealing ring embedded in the sealing groove is arranged at the bottom of the gland. When the gland is pressed tightly against the top of the valve tube, the sealing ring is embedded in the two sealing grooves at the same time.

[0018] The utility model is further configured as follows: a mounting tube is fixedly connected to one end of the bottom of the sampling tube, the mounting tube can be inserted downward into the valve tube and fit with the inner wall of the valve tube, a pressure ring is fixedly connected to the outside of the mounting tube, and when the pressure ring is pressed against the top of the valve tube, the bottom of the mounting tube is pressed against the top of the baffle;

[0019] Two pressing plates are fixedly connected to the two sides of the pressing ring so that the pressing mechanism can press the pressing ring onto the top of the valve pipe through the two pressing plates.

[0020] The utility model is further configured as follows: an annular groove is provided at the bottom of the mounting tube, and when the mounting tube is pressed against the top of the retaining ring, the annular groove at the bottom of the mounting tube is aligned with the annular groove at the top of the retaining ring, and a sealing ring located in the annular groove is also provided at the bottom of the mounting tube, and when the mounting tube is pressed against the top of the retaining ring, the sealing ring at the bottom of the mounting tube is also embedded in the annular groove at the top of the retaining ring;

[0021] A sealing groove is provided at the bottom of the pressure ring. When the pressure ring is pressed against the top of the valve tube, the sealing groove at the bottom of the pressure ring is aligned with the sealing groove at the top of the valve tube. A sealing ring is provided in the sealing groove at the bottom of the pressure ring. When the pressure ring is pressed against the top of the valve tube, the sealing ring at the bottom of the pressure ring is also embedded in the sealing groove at the top of the valve tube.

[0022] The utility model is further configured as follows: it also includes a protective cover, both ends of the protective cover are provided with through holes for the connecting pipe to pass through, the protective cover is composed of two semicircular tube-shaped components, and the two components are detachably connected together by bolts and nuts;

[0023] The protective cover houses the valve pipe, the gland and the clamping mechanism cover. A natural gas detection sensor is fixedly connected to the inner wall of the protective cover. The natural gas detection sensor is connected to an alarm device, and the alarm device is used to send out sound and light alarm signals.

[0024] To sum up, compared with the prior art, the utility model has the following beneficial effects: the utility model, through the setting of the clamping mechanism, when not sampling, the clamping mechanism presses the pressure cover on the top of the valve tube and embeds the sealing plug into the valve tube, thereby sealing the valve tube, making it difficult for external dust to enter the valve tube, thereby eliminating the need to discharge impurities before sampling, and preventing impurities from affecting the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of an embodiment;

[0026] Figure 2 A schematic diagram of installing a sealing plug on a valve pipe of an embodiment;

[0027] Figure 3 A cross-sectional view of a sealing plug installed on a valve pipe of an embodiment;

[0028] Figure 4 for Figure 3 A magnified schematic diagram of part A;

[0029] Figure 5 A schematic diagram of natural gas sampling in an embodiment;

[0030] Figure 6 A cross-sectional view of an embodiment of natural gas sampling;

[0031] Figure 7 for Figure 6 An enlarged schematic diagram of part B.

[0032] In the figure: 1. connecting pipe; 2. valve pipe; 3. pressure cover; 31. sealing plug; 32. pressure plate; 33. retaining ring; 4. clamping mechanism; 41. connecting rod; 42. nut; 6. protective cover; 61. through hole; 7. valve; 8. sealing groove; 81. sealing ring; 9. annular groove; 91. sealing ring. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0034] The utility model is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0035] Embodiment: A natural gas detection pipe connector, see attached Figure 1 -Attached Figure 7 , including a connecting pipe 1, a valve pipe 2, a valve 7, a sealing plug 31, a gland 3, a pressing mechanism 4 and a sampling tube, wherein the connecting pipe 1 is connected between two adjacent transmission pipelines as a part of a natural gas transmission pipeline; the valve pipe 2 is fixedly connected to the top of the connecting pipe 1 and is vertically arranged; the valve 7 is arranged on the valve pipe 2 to control the switch of the valve pipe 2; the sealing plug 31 can be inserted into the top of the valve pipe 2 and fit with the inner wall of the valve pipe 2; the gland 3 is fixedly connected to the top of the sealing plug 31, and the gland 3 is pressed against the top of the valve pipe 2 when the sealing plug 31 is inserted into the valve pipe 2; the pressing mechanism 4 is used to press the gland 3 against the top of the sealing plug 31; the sampling tube can be fixedly connected to the top of the valve pipe 2 when the sealing plug 31 is pulled out of the valve pipe 2.

[0036] When sampling, the clamping mechanism 4 relaxes the clamping on the gland 3, removes the gland 3 and the sealing plug 31 from the valve tube 2, then connects the sampling tube to the valve tube 2, opens the valve 7 on the valve tube 2, and samples are taken through the valve tube 2; after the sampling is completed, the sealing plug 31 is inserted into the valve tube 2 and the gland 3 is clamped on the top of the valve tube 2 by the clamping mechanism 4, and the valve tube 2 is sealed by the valve cover and the sealing plug 31, so that external dust is not easy to enter the valve tube 2. When sampling is performed again in the future, since there is no dust impurities in the valve tube 2, there is no need to discharge the dust impurities first, and when sampling is performed, the detection accuracy is not easily affected by the presence of dust impurities.

[0037] Specifically, two pressing plates 32 are fixedly connected on both sides of the gland 3; the clamping mechanism 4 includes a connecting rod 41 and a nut 42, two connecting rods 41 are provided and are vertically arranged, the connecting rod 41 is fixedly connected to the top of the connecting pipe 1 and the two connecting rods 41 are respectively located on both sides of the valve pipe 2, and the two connecting rods 41 vertically pass through the two pressing plates 32 on both sides of the gland 3; the two nuts 42 are respectively threadedly connected to the two connecting rods 41 and the two nuts 42 are respectively pressed on the top of the two pressing plates 32. By tightening the two nuts 42, downward pressure can be applied to the two pressing plates 32, so that the gland 3 is pressed on the top of the valve pipe 2 through the two pressing plates 32.

[0038] Specifically, the inner wall of the valve tube 2 is fixedly connected with a retaining ring 33 located above the valve 7 . When the gland 3 is pressed against the top of the valve tube 2 , the bottom of the sealing plug 31 contacts the top of the retaining ring 33 .

[0039] Two annular grooves 9 are provided at the top of the retaining ring 33 and at the bottom of the sealing plug 31. When the sealing plug 31 is pressed against the top of the retaining ring 33, the two sealing grooves 8 are aligned. A sealing ring 91 embedded in the annular groove 9 is provided at the bottom of the sealing plug 31. When the sealing plug 31 is pressed against the top of the retaining ring 33, the sealing ring 91 is simultaneously embedded in the two annular grooves 9. The provision of the sealing ring 91 and the annular groove 9 can further improve the sealing performance of the sealing plug 31 to the valve pipe 2, and prevent foreign impurities from entering the valve pipe 2.

[0040] Specifically, two annular sealing grooves 8 are provided at the bottom of the gland 3 and the top of the valve tube 2. When the gland 3 is pressed against the top of the valve tube 2, the two sealing grooves 8 are aligned. A sealing ring 81 embedded in the sealing groove 8 is provided at the bottom of the gland 3. When the gland 3 is pressed against the top of the valve tube 2, the sealing ring 81 is embedded in the two sealing grooves 8 at the same time. By providing the sealing groove 8 and the sealing ring 81, the sealing performance of the connection between the gland 3 and the valve tube 2 can be improved to prevent external dust from entering the valve tube 2.

[0041] Specifically, one end of the bottom of the sampling tube is fixedly connected to a mounting tube, which can be inserted downward into the valve tube 2 and fit against the inner wall of the valve tube 2. A pressure ring is fixedly connected to the outside of the mounting tube. When the pressure ring is pressed against the top of the valve tube 2, the bottom of the mounting tube is pressed against the top of the baffle. Two pressure plates 32 are fixedly connected on both sides of the pressure ring so that the clamping mechanism 4 can press the pressure ring against the top of the valve tube 2 through the two pressure plates 32.

[0042] By installing the tube, the pressure ring and the pressure plates 32 on both sides of the pressure ring, downward pressure can be applied to the two pressure plates 32 through the two nuts 42 on the two connecting rods 41, so that the pressure ring is pressed tightly on the top of the valve tube 2, thereby realizing the connection between the sampling tube and the valve tube 2.

[0043] An annular groove 9 is provided at the bottom of the mounting tube. When the mounting tube is pressed against the top of the retaining ring 33, the annular groove 9 at the bottom of the mounting tube is aligned with the annular groove 9 at the top of the retaining ring 33. A sealing ring 91 is also provided at the bottom of the mounting tube and is located in the annular groove 9. When the mounting tube is pressed against the top of the retaining ring 33, the sealing ring 91 at the bottom of the mounting tube is also embedded in the annular groove 9 at the top of the retaining ring 33. By providing the annular groove 9 and the sealing ring 91 at the bottom of the mounting tube, the sealing performance of the connection between the mounting tube and the retaining ring 33 can be improved.

[0044] A sealing groove 8 is provided at the bottom of the pressure ring. When the pressure ring is pressed against the top of the valve tube 2, the sealing groove 8 at the bottom of the pressure ring is aligned with the sealing groove 8 at the top of the valve tube 2. A sealing ring 81 is provided in the sealing groove 8 at the bottom of the pressure ring. When the pressure ring is pressed against the top of the valve tube 2, the sealing ring 81 at the bottom of the pressure ring is also embedded in the sealing groove 8 at the top of the valve tube 2. By providing the sealing groove 8 and the sealing ring 81 at the bottom of the pressure ring, the sealing performance of the connection between the pressure ring and the valve tube 2 can be improved.

[0045] Specifically, the present embodiment further includes a protective cover 6, both ends of which are provided with through holes 61 for the connecting pipe 1 to pass through, the protective cover 6 being composed of two components arranged in a semicircular tube shape, and the two components being detachably connected together by bolts and nuts 42; the protective cover 6 covers the valve tube 2, the pressure cover 3 and the clamping mechanism 4 inside; through the provision of the protective cover 6, when sampling is not required, it is possible to further isolate external dust and impurities, making it more difficult for external dust and impurities to enter the valve tube 2.

[0046] A natural gas detection sensor is fixedly connected to the inner wall of the protective cover 6, and the natural gas detection sensor is connected to an alarm, and the alarm is used to send out an audible and visual alarm signal. The alarm is set in the control room of natural gas transmission. In the enclosed space surrounded by the protective cover 6, when natural gas leaks through the valve pipe 2, the natural gas detection sensor can detect the natural gas in time, and then send out an alarm signal through the alarm, so that personnel can find and repair it in time.

[0047] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A pipeline connector for natural gas detection, characterized in that: It comprises a connecting pipe (1), wherein the connecting pipe (1) connects two adjacent transmission pipelines as a part of a natural gas transmission pipeline; A valve pipe (2), the valve pipe (2) is fixedly connected to the top of the connecting pipe (1) and is arranged vertically; A valve (7), wherein the valve (7) is arranged on the valve tube (2) and is used to control the opening and closing of the valve tube (2); A sealing plug (31), wherein the sealing plug (31) can be inserted into the top of the valve tube (2) and fits against the inner wall of the valve tube (2); A gland (3), wherein the gland (3) is fixedly connected to the top of the sealing plug (31), and when the sealing plug (31) is inserted into the valve tube (2), the gland (3) is pressed tightly against the top of the valve tube (2); A pressing mechanism (4), the pressing mechanism (4) being used to press the gland (3) onto the top of the sealing plug (31); and a sampling tube, which can be fixedly connected to the top of the valve tube (2) when the sealing plug (31) is pulled out of the valve tube (2).

2. A natural gas detection pipeline connector according to claim 1, characterized in that: Two pressing plates (32) are fixedly connected to both sides of the pressing cover (3); The clamping mechanism (4) comprises a connecting rod (41), two connecting rods (41) are provided and are vertically arranged, the connecting rod (41) is fixedly connected to the top of the connecting pipe (1) and the two connecting rods (41) are respectively located on both sides of the valve pipe (2), and the two connecting rods (41) vertically pass through two pressure plates (32) on both sides of the gland (3); and nuts (42), wherein the two nuts (42) are respectively threadedly connected to the two connecting rods (41) and the two nuts (42) are respectively pressed against the tops of the two pressing plates (32).

3. A natural gas detection pipeline connector according to claim 2, characterized in that: The inner wall of the valve tube (2) is fixedly connected with a retaining ring (33) located above the valve (7). When the gland (3) is pressed against the top of the valve tube (2), the bottom of the sealing plug (31) contacts the top of the retaining ring (33).

4. A natural gas detection pipeline connector according to claim 3, characterized in that: Two annular grooves (9) are arranged at the top of the retaining ring (33) and at the bottom of the sealing plug (31); when the sealing plug (31) is pressed against the top of the retaining ring (33), the two sealing grooves (8) are aligned; a sealing ring (91) is arranged at the bottom of the sealing plug (31) and is embedded in the annular groove (9); and when the sealing plug (31) is pressed against the top of the retaining ring (33), the sealing ring (91) is embedded in the two annular grooves (9) at the same time.

5. A natural gas detection pipeline connector according to claim 4, characterized in that: Two annular sealing grooves (8) are provided at the bottom of the gland (3) and the top of the valve tube (2); when the gland (3) is pressed against the top of the valve tube (2), the two sealing grooves (8) are aligned; a sealing ring (81) embedded in the sealing groove (8) is provided at the bottom of the gland (3); when the gland (3) is pressed against the top of the valve tube (2), the sealing ring (81) is embedded in the two sealing grooves (8) at the same time.

6. A natural gas detection pipeline connector according to claim 5, characterized in that: A mounting tube is fixedly connected to one end of the bottom of the sampling tube, and the mounting tube can be inserted downward into the valve tube (2) and fit against the inner wall of the valve tube (2). A pressure ring is fixedly connected to the outside of the mounting tube, and when the pressure ring is pressed against the top of the valve tube (2), the bottom of the mounting tube is pressed against the top of the baffle; Two pressing plates (32) are fixedly connected to the two sides of the pressing ring so that the pressing mechanism (4) can press the pressing ring onto the top of the valve tube (2) through the two pressing plates (32).

7. A natural gas detection pipeline connector according to claim 6, characterized in that: The bottom of the mounting tube is provided with an annular groove (9). When the mounting tube is pressed against the top of the retaining ring (33), the annular groove (9) at the bottom of the mounting tube is aligned with the annular groove (9) at the top of the retaining ring (33). The bottom of the mounting tube is also provided with a sealing ring (91) located in the annular groove (9). When the mounting tube is pressed against the top of the retaining ring (33), the sealing ring (91) at the bottom of the mounting tube is also embedded in the annular groove (9) at the top of the retaining ring (33). A sealing groove (8) is arranged at the bottom of the pressure ring. When the pressure ring is pressed tightly against the top of the valve tube (2), the sealing groove (8) at the bottom of the pressure ring is aligned with the sealing groove (8) at the top of the valve tube (2). A sealing ring (81) is arranged in the sealing groove (8) at the bottom of the pressure ring. When the pressure ring is pressed tightly against the top of the valve tube (2), the sealing ring (81) at the bottom of the pressure ring is also embedded in the sealing groove (8) at the top of the valve tube (2).

8. A natural gas detection pipeline connector according to claim 7, characterized in that: It also comprises a protective cover (6), wherein both ends of the protective cover (6) are provided with through holes (61) for the connecting pipe (1) to pass through, and the protective cover (6) is composed of two parts arranged in a semicircular tube shape, and the two parts are detachably connected together by bolts and nuts (42); The protective cover (6) covers the valve tube (2), the gland (3) and the clamping mechanism (4) therein, and a natural gas detection sensor is fixedly connected to the inner wall of the protective cover (6). The natural gas detection sensor is connected to an alarm device, and the alarm device is used to emit an audible and visual alarm signal.

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