Natural gas outdoor pipeline and fracture detection system

Abstract

The invention relates to the technical field of natural gas pipelines, in particular to a natural gas outdoor pipeline and fracture detection system which comprises a pressure regulating assembly, a gas outlet of the pressure regulating assembly is connected with gas conveying pipelines through flanges, a stop valve is arranged between every two connected gas conveying pipelines, and the stop valves and the gas conveying pipelines are connected through flanges. The outer side of the stop valve is wrapped with the protection assembly, the lower end of the protection assembly is provided with the adjusting assembly, the valve can be protected to a certain degree by arranging the detachably-installed protection shell on the outer side of the valve at the pipeline connecting position, the valve is prevented from being corroded by various kinds, meanwhile, an inspection and lubricating structure is arranged, and the service life of the valve is prolonged. The valve can be lubricated and maintained manually in the regular inspection process, the service life of the valve is prolonged, meanwhile, the height-adjustable supporting structure is installed at the lower end of the protection shell, the connecting position of a pipeline and the valve can be supported, the device can adapt to the installation environments of different terrains, and maintenance personnel can conveniently and rapidly complete the maintenance process.

Description

Technical Field

[0001] The invention relates to the technical field of natural gas pipelines, in particular to a natural gas outdoor pipeline and a rupture detection system. Background Art

[0002] Natural gas refers to all gases that exist naturally in nature, including various naturally formed gases in the atmosphere, hydrosphere and lithosphere. Its main use is as fuel. Before natural gas is transported, it needs to be regulated by a pressure regulating station to suit the transmission pipelines in the middle and lower reaches. When transporting, the pipeline needs to be installed in the transportation area.

[0003] At present, when existing natural gas pipelines are installed, the valves used to control the pipelines are usually used in the open air. As the years of use increase, the valves will be subject to various erosions, resulting in rust problems at the valve stems, which not only increases the possibility of natural gas leakage from the valves, but also when leakage occurs, it is difficult for staff to reduce natural gas waste by controlling the valves on both sides of the leakage point; in addition, existing natural gas pipelines are mostly installed at a fixed height. If the ground is subsequently dented and undulated, resulting in misalignment problems at the connection, it is difficult for maintenance personnel to make quick adjustments, which increases the difficulty of maintenance and reduces maintenance efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a natural gas outdoor pipeline and rupture detection system. By arranging a detachable protective shell on the outer side of the valve at the pipeline connection, the valve can be protected to a certain extent to prevent the valve from being corroded by various factors. At the same time, an inspection and lubrication structure is arranged, so that the valve can be lubricated and maintained manually during regular inspections, thereby extending the service life of the valve. At the same time, a height-adjustable support structure is installed at the lower end of the protective shell, which can not only support the connection between the pipeline and the valve, but also adapt to the installation environment of different terrains, making it convenient for maintenance personnel to quickly complete the maintenance process.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a natural gas outdoor pipeline, including a pressure regulating assembly, the gas outlet of the pressure regulating assembly is connected to a gas pipeline through a flange, a stop valve is arranged between the two connected gas pipelines, the stop valve and the gas pipeline are connected through a flange, the outer side of the stop valve is provided with a protection component, and the lower end of the protection component is provided with an adjustment component; The described protection component includes an upper shell. An upper shell is provided above the stop valve, and a lower shell is provided below the stop valve. The lower shell and the upper shell are used in combination and are fixedly connected by fastening bolts to form a sealed space. On the lateral outer wall of the upper shell, L-shaped mounting plates are symmetrically installed. An arc-shaped through groove is provided on the side wall of the L-shaped mounting plate. At the upper end inside the upper shell, atomizing units are symmetrically arranged. The atomizing units face the valve stem of the stop valve. On the outer wall of the L-shaped mounting plate corresponding to the upper shell, an inspection connection unit is fixedly installed. The inspection connection unit is fixedly connected to the atomizing unit. At the end of the inspection connection unit far from the side wall of the upper shell, an inspection assembly is fixedly connected. The lower end of the inspection assembly fits against the outer wall of the gas transmission pipeline. The inspection assembly is located on the side of the L-shaped mounting plate far from the upper shell.

[0006] Preferably, the gas transmission pipeline is made of a high-strength steel wire wound in a left-right spiral to form a reticular skeleton as the reinforcement, with high-density polyethylene as the matrix and is formed by an extrusion winding process.

[0007] Preferably, a sealing strip is provided between the upper shell and the lower shell.

[0008] Preferably, sealing rings are installed at the positions where the upper shell and the lower shell are close to the ends and in contact with the gas transmission pipeline.

[0009] Preferably, a knob is slidably arranged in the middle of the upper end face of the upper shell. The lower end of the knob is slidably matched with the upper end of the valve stem of the stop valve. After the two are engaged, the knob can control the opening and closing of the stop valve. A contact spring is sleeved outside the valve stem of the stop valve, and the upper end of the contact spring abuts against the lower end face of the knob.

[0010] Preferably, the atomizing unit includes an oil supply bottle. The oil supply bottle is fixedly installed at a position near the edge of the upper end of the upper shell. The oil outlet pipe of the oil supply bottle extends into the upper shell and is fixedly installed with an electromagnetic burette valve. A burette is installed at the lower end of the electromagnetic burette valve. The lower end of the burette is connected to an atomizing nozzle assembly. An L-shaped rod is fixedly installed on the inner side wall of the upper shell. An L-shaped cavity is provided inside the L-shaped rod. A piston rod is slidably installed in the L-shaped cavity through a first spring. The end of the piston rod far from the first spring extends outside the upper shell and is fixedly connected to the inspection connection unit. An air supply pipe is connected to the upper end of the L-shaped cavity. The air supply pipe is connected to the inside of the atomizing nozzle assembly.

[0011] Preferably, the inspection connection unit includes a lining plate. Lining plates are symmetrically arranged on the side wall of the L-shaped mounting plate corresponding to the upper shell. A chute is provided on the lining plate. A U-shaped plate is slidably installed in the chute through a second spring. A wire wheel is rotatably installed on the opposite side walls of the U-shaped plate through a torsion spring. A traction rope is wound around the wire wheel. The end of the traction rope penetrates through the arc-shaped through groove on the L-shaped mounting plate and is fixedly tied to the inspection assembly.

[0012] Preferably, the stiffness coefficient of the second spring is greater than the stiffness coefficient of the first spring, so that when the inspection assembly is manually pulled to move along the outer wall of the gas pipeline, the shaped plate will not drive the piston rod to move before the traction rope is unwound to the maximum limit.

[0013] Preferably, the adjustment assembly includes an internal thread adjustment cylinder, which is rotatably installed on the middle part of the lower end surface of the lower shell body, and an arc handle is symmetrically installed on the outer wall of the internal thread adjustment cylinder. A threaded rod is screwed on the inner side of the internal thread adjustment cylinder, and the lower end of the threaded rod is fixedly connected to the supporting base plate.

[0014] Preferably, a natural gas outdoor pipeline rupture detection system comprises: Image acquisition module: used to acquire images of the surface of the gas pipeline; Image analysis module: processes and analyzes the collected images and transmits them; Rupture detection module: recognizes the image transmitted by the image analysis module to determine whether there is any abnormality in the gas pipeline, where pipeline abnormalities at least include: pipeline rupture and pipeline corrosion; Alarm module: When an abnormality is detected on the surface of the gas pipeline, an alarm is immediately issued; Data recording and storage module: used to store various data and information during the entire detection process.

[0015] In particular, the rupture detection system also includes: Sensor data acquisition module: The sensor data acquisition module receives pipeline data monitored by sensors on the pipeline. 1 And sent to the sensor data analysis module and the storage module, the pipeline data at least includes: pipeline pressure, pipeline temperature; Sensor data analysis module: The sensor data analysis module receives pipeline data from all sensors. 1 And with the preset threshold thresh 1 For comparison, when d 1 >thresh 1 When the alarm module sounds an alarm.

[0016] In particular, the sensor data analysis module also performs trend prediction on the historical data stored in the memory and generates trend prediction results. 2 With sensor pipeline data 1 Subtract and add to the preset threshold thresh 2 For comparison, when When the alarm module sounds an alarm.

[0017] In particular, the crack detection system also integrates image analysis, crack detection and sensor analysis results for storage and sends them to a terminal display module for visual display, and the display methods at least include: a computer terminal and a mobile terminal.

[0018] Beneficial effects of the present invention: 1. By arranging a detachable upper shell and a lower shell between two adjacent pipes to form a sealing area, the stop valve can be protected and the air can be isolated from entering, thereby avoiding the problem of rust on the stop valve and reducing the possibility of natural gas leakage from the stop valve; 2. The inspection assembly can drive the atomization unit to operate during the manual regular inspection, so as to lubricate and maintain the stop valve, which not only prolongs the service life of the valve, but also forms an oil film on the surface of the stop valve to further isolate the direct erosion of the air, thus avoiding the problem of rust and aging of the stop valve as the service life increases, which may cause the stop valve to leak. 3. Install a height-adjustable adjustment component at the lower end of the protective shell, which can not only support the connection between the gas pipeline and the stop valve, but also adapt to the installation environment of different terrains. When the terrain changes, it is convenient for maintenance personnel to quickly complete the maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention without the voltage regulating assembly; Figure 3 It is a schematic diagram of the three-dimensional connection structure between the gas pipeline, the lower shell and the adjustment component in the present invention; Figure 4 The present invention Figure 3 A schematic diagram of the enlarged structure at point A; Figure 5 It is a schematic diagram of the three-dimensional connection structure between the gas pipeline, the stop valve and the protection component in the present invention; Figure 6 The present invention Figure 5 A schematic diagram of the three-dimensional connection structure after removing the front side wall of the L-shaped rod; Figure 7 The present invention Figure 6 A schematic diagram of the enlarged structure at B; Figure 8 The present invention Figure 2 A schematic diagram of the enlarged structure at C; Fig. 9 It is a module diagram of the rupture detection system in the present invention; Fig.10 It is a schematic diagram of the working process of the rupture detection system of the present invention.

[0021] In the figure: 1. Pressure regulating assembly; 2. Gas transmission pipeline; 3. Stop valve; 4. Protection component; 41. Upper shell; 411. Knob; 412. Abutting spring; 42. Lower shell; 421. Sealing strip; 422. Sealing ring; 43. L-shaped mounting plate; 44. Atomization unit; 441. Oil supply bottle; 442. Electromagnetic burette valve; 443. Burette; 444. Atomizing nozzle assembly; 445. L-shaped rod; 446. Piston rod; 447. First spring; 448. Air supply pipe; 45. Inspection connection unit; 451. Liner; 452. Chute; 453. C-shaped plate; 454. Second spring; 455. Wire wheel; 456. Towing rope; 46. Inspection assembly; 5. Adjusting component; 51. Support bottom plate; 52. Threaded rod; 53. Internally threaded adjusting cylinder; 54. Arc-shaped handle. Specific implementation manners

[0022] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0023] Embodiment 1: Refer to Figures 1 to 10 , a natural gas outdoor pipeline, including a pressure regulating assembly 1, the air outlet of the pressure regulating assembly 1 is connected to a gas transmission pipeline 2 through a flange, a stop valve 3 is arranged between two adjacent gas transmission pipelines 2, the stop valve 3 and the gas transmission pipeline 2 are connected through a flange, and a protection component 4 is wrapped outside the stop valve 3.

[0024] The gas transmission pipeline 2 is made of a high-strength steel wire wound in a left-right spiral to form a mesh skeleton as a reinforcement, and a high-density polyethylene as a matrix and is formed by an extrusion winding process.

[0025] The protection component 4 includes an upper shell 41, an upper shell 41 is arranged above the stop valve 3, and a lower shell 42 is arranged below the stop valve 3. The lower shell 42 and the upper shell 41 are used in combination and are fixedly connected by fastening bolts to form a closed space. An L-shaped mounting plate 43 is symmetrically installed on the lateral outer wall of the upper shell 41, and an arc-shaped through groove is opened on the side wall of the L-shaped mounting plate 43. An atomization unit 44 is symmetrically arranged on the upper end of the upper shell 41. The atomization unit 44 is directly opposite to the valve stem of the stop valve 3. An inspection connection unit 45 is fixedly installed on the outer wall of the L-shaped mounting plate 43 corresponding to the upper shell 41. The inspection connection unit 4 and the atomization unit 44 are fixedly connected. The end of the inspection connection unit 45 away from the side wall of the upper shell 41 is fixedly connected with an inspection assembly 46, and the lower end of the inspection assembly 46 is attached to the outer wall of the gas pipeline 2. The inspection assembly 46 is located on the side of the L-shaped mounting plate 43 away from the upper shell 41.

[0026] A sealing strip 421 is provided between the upper shell 41 and the lower shell 42 , and a sealing ring 422 is installed at a position of the upper shell 41 and the lower shell 42 close to the end and in contact with the gas pipeline 2 .

[0027] A knob 411 is slidably provided in the middle of the upper end surface of the upper shell 41, and the lower end of the knob 411 is slidably matched with the upper end of the valve stem of the stop valve 3 and when the two are engaged, the knob 411 can control the opening and closing of the stop valve 3, and an abutment spring 412 is sleeved on the outer side of the valve stem of the stop valve 3, and the upper end of the abutment spring 412 is tightly abutted against the lower end surface of the knob 411.

[0028] During the specific operation, the multiple gas pipelines 2 are manually arranged in sequence, and then the two ends of the stop valve 3 are connected to the ends of the two adjacent gas pipelines 2 through flanges in turn, and then the abutment spring 412 is sleeved on the valve stem of the stop valve 3, and then the sealing ring 422 is sleeved on the position of the gas pipeline 2 near the end, and then the upper shell 41 and the lower shell 42 are aligned and clamped on the outside of the stop valve 3, so that the lower end of the knob 411 is sleeved on the valve stem of the stop valve 3 and the abutment spring 412 is compressed, and the gasket 412 is tightened. The fixing bolts fix the upper shell 41 and the lower shell 42 together, and the sealing strip 421 can ensure the sealing between the sides of the upper shell 41 and the lower shell 42, so as to prevent humid air from entering the space formed by the upper shell 41 and the lower shell 42 and causing corrosion to the valve stem of the stop valve 3. The sealing ring 422 can ensure the sealing performance of the connection between the upper shell 41 and the lower shell 42 and the gas pipeline 2 respectively. Finally, the entire pipeline is connected to the outlet of the pressure regulating assembly 1 to form a natural gas outdoor pipeline.

[0029] The atomization unit 44 includes an oil supply bottle 441 which is fixedly installed at a position near the edge of the upper end of the upper housing 41. The oil outlet pipe of the oil supply bottle 441 extends into the upper housing 41 and is fixedly installed with an electromagnetic burette valve 442. An end burette 443 is installed at the lower end of the electromagnetic burette valve 442. The lower end of the end burette 443 is connected with an atomizing nozzle assembly 444. An L-shaped rod 445 is fixedly installed on the inner side wall of the upper housing 41. An L-shaped cavity is formed inside the L-shaped rod 445. A piston rod 446 is slidably installed inside the L-shaped cavity through a first spring 447. The end of the piston rod 446 away from the first spring 447 extends outside the upper housing 41 and is fixedly connected with the inspection connection unit 45. An air supply pipe 448 is connected to the upper end of the L-shaped cavity. The air supply pipe 448 is communicated with the inside of the atomizing nozzle assembly 444.

[0030] The inspection connection unit 45 includes a lining plate 451. Lining plates 451 are symmetrically arranged on the side wall of the L-shaped mounting plate 43 corresponding to the upper housing 41. A chute 452 is formed on the lining plate 451. A U-shaped plate 453 is slidably installed inside the chute 452 through a second spring 454. A wire wheel 455 is rotatably installed on the opposite side walls of the U-shaped plate 453 through a torsion spring. A traction rope 456 is wound around the wire wheel 455. The end of the traction rope 456 penetrates through the arc-shaped through groove on the L-shaped mounting plate 43 and is fixedly tied to the inspection assembly 46. The spring constant of the second spring 454 is greater than that of the first spring 447, so that when a person pulls the inspection assembly 46 to move along the outer wall of the gas transmission pipeline 2, before the traction rope 456 is unreeled to the maximum limit, the U-shaped plate 453 will not drive the piston rod 446 to move.

[0031] During specific operation, during the use of the outdoor natural gas pipeline, professional personnel conduct regular inspections. The specific operation method is as follows: Professional personnel pull the inspection assembly 46 to move along the surface of the gas transmission pipeline 2. During this process, the inspection assembly 46 can complete pipeline rupture detection. Since the spring constant of the second spring 454 is greater than that of the first spring 447, during the process of manually pulling the inspection assembly 46, the wire wheel 455 will rotate, and the traction rope 456 will be unreeled. When the traction rope 456 is unreeled to the maximum limit, the torsion spring also reaches the maximum limit. Continuing to manually pull the inspection assembly 46 will drive the second spring 454 to stretch, and the C-shaped plate 453 will move away from the upper housing 41. The C-shaped plate 453 drives the piston rod 446 to move and drives the first spring 447 to stretch. At this time, the air inside the L-shaped cavity will be compressed and extruded through the air supply pipe 448. The oil supply bottle 441 is provided with lubricating oil. The electromagnetic titration valve 442 can drip the lubricating oil in the oil supply bottle 441 onto the atomizing nozzle assembly 444 through the burette 443. The atomizing nozzle assembly 444 will atomize the oil droplets. The air extruded by the air supply pipe 448 will enter the atomizing nozzle assembly 444 and then be ejected from the outlet of the atomizing nozzle assembly 444 onto the valve stem of the stop valve 3, thereby playing a lubricating role and forming an oil film on the surface of the stop valve 3, further isolating the direct erosion of air. In this way, it can avoid the problem of rust and aging of the stop valve 3 with the increase of the service life and prevent air leakage of the stop valve 3.

[0032] Embodiment 2: Basically the same as the technical solution of Embodiment 1, refer to Figures 1 to 3 The difference is that: an adjustment component 5 is arranged at the lower end of the protection component 4. The adjustment component 5 includes an internally threaded adjustment cylinder 53. The middle part of the lower end surface of the lower housing 42 is rotatably installed with an internally threaded adjustment cylinder 53. Arc-shaped handles 54 are symmetrically installed on the outer side wall of the internally threaded adjustment cylinder 53. A threaded rod 52 is screwed inside the internally threaded adjustment cylinder 53. The lower end of the threaded rod 52 is fixedly connected with a support bottom plate 51.

[0033] During specific operation, during the process of aligning and installing the upper housing 41 and the lower housing 42, manual operation can hold the arc-shaped handle 54 to drive the internally threaded adjustment cylinder 53 to rotate, thereby adjusting the distance between the threaded rod 52 and the internally threaded adjustment cylinder 53, and further adjusting the distance between the lower housing 42 and the support bottom plate 51, so that after the upper housing 41 and the lower housing 42 are installed, they are in a horizontal position to adapt to the installation environment of different terrains.

[0034] Refer to Fig. 9 、 Fig.10 A natural gas outdoor pipeline rupture detection system, the rupture detection system includes: Image acquisition module: used to acquire images of the surface of the gas transmission pipeline 2; Image analysis module: processes and analyzes the collected images and transmits them; Rupture detection module: recognizes the image transmitted by the image analysis module to determine whether there is any abnormality in the gas pipeline 2, wherein the pipeline abnormality at least includes: pipeline rupture and pipeline corrosion. The image recognition algorithms involved in the prior art at least include: machine learning algorithms, deep learning algorithms and statistical methods, such as: faster R-cnn, support vector machine (SVM), etc.

[0035] Alarm module: when an abnormality is detected on the surface of the gas pipeline 2, an alarm is immediately issued; Data recording and storage module: used to store various data and information during the entire detection process.

[0036] Sensor data acquisition module: The sensor data acquisition module receives pipeline data monitored by sensors on the pipeline. 1 And send it to the sensor data analysis module and storage module; Sensor data analysis module: The sensor data analysis module receives pipeline data from all sensors. 1 And with the preset threshold thresh 1 For comparison, when d 1 >thresh 1 When the alarm module sounds an alarm, the sensor data analysis module also performs trend prediction on the historical data stored in the memory and reports the trend prediction results d 2 With sensor pipeline data 1 Subtract and add to the preset threshold thresh 2 For comparison, when When the alarm module sounds an alarm; Terminal display module: The crack detection system integrates image analysis, crack detection and sensor analysis results for storage and sends them to the terminal display module for visual display.

[0037] During specific work, when the inspection assembly 46 is manually pulled to move along the surface of the gas pipeline 2, the image acquisition module inside the inspection assembly 46 can collect images of the surface of the gas pipeline 2 in real time, and the image analysis module can process and analyze the collected images and transmit them to the rupture detection module. The rupture detection module uses advanced algorithms and technologies to identify the images transmitted by the image analysis module to determine whether there is a rupture abnormality in the gas pipeline 2. If an abnormality is detected on the surface of the gas pipeline 2, an alarm is immediately issued through the alarm module, and the data recording and storage module can record the rupture point data, so as to facilitate manual further action. After the inspection process is completed, the staff can directly view the inspection results on the mobile phone or computer to promptly discover problems in the inspection process.

[0038] Working principle of the present invention: S1: First, manually arrange multiple gas pipelines 2 in sequence, then connect the two ends of the stop valve 3 to the ends of two adjacent gas pipelines 2 through flanges, then sleeve the abutment spring 412 on the valve stem of the stop valve 3, and then sleeve the sealing ring 422 on the position of the gas pipeline 2 near the end, then align and clamp the upper shell 41 and the lower shell 42 on the outside of the stop valve 3, so that the lower end of the knob 411 is sleeved on the valve stem of the stop valve 3 and the abutment spring 412 is compressed, and the upper shell 41 and the lower shell 42 are fixedly connected by fastening bolts. The sealing strip 421 can ensure the sealing between the upper shell 41 and the lower shell 42 side parts, thereby preventing humid air from entering the space formed by the upper shell 41 and the lower shell 42 and causing rust to the valve stem of the stop valve 3. The sealing ring 422 can ensure the sealing performance of the upper shell 41, the lower shell 42 and the gas pipeline 2. Finally, the entire pipeline is connected to the outlet of the pressure regulating assembly 1, thereby forming a natural gas outdoor pipeline; S2: During the use of the outdoor natural gas pipeline, regular inspections are carried out by professionals. The specific operation method is as follows: the professional pulls the inspection assembly 46 to move along the surface of the gas pipeline 2. During this process, the image acquisition module inside the inspection assembly 46 can collect images of the surface of the gas pipeline 2 in real time, and the image analysis module can process and analyze the collected images and transmit them to the rupture detection module. The rupture detection module uses advanced algorithms and technologies to identify the images transmitted by the image analysis module to determine whether there is a rupture abnormality in the gas pipeline 2. If an abnormality is detected on the surface of the gas pipeline 2, an alarm is immediately issued through the alarm module, and the data recording and storage module can record the rupture point data, so as to facilitate manual further actions. At the same time, the sensor data acquisition and analysis module receives sensor data in real time. When an abnormality is found through sensor data analysis, the system promptly issues an alarm and displays it in real time through the terminal display module. It should be noted that the results of the image detection module are also synchronously output to the terminal display module, and the terminal staff can view the data in real time to ensure the normal operation of the pipeline; S3: Since the spring constant of the second spring 454 is greater than that of the first spring 447, during the process of manually pulling the inspection assembly 46, the wire wheel 455 will rotate, the towing rope 456 will be unreeled. When the towing rope 456 is unreeled to the maximum limit, the torsion spring also reaches the maximum limit. If the inspection assembly 46 is continuously pulled manually, it will drive the second spring 454 to stretch, and the U-shaped plate 453 will move away from the upper housing 41. The U-shaped plate 453 drives the piston rod 446 to move and drives the first spring 447 to stretch. At this time, the air inside the L-shaped cavity will be compressed and extruded through the air supply pipe 448. There is lubricating liquid in the oil supply bottle 441. The electromagnetic burette valve 442 can drip the lubricating liquid in the oil supply bottle 441 onto the atomizing nozzle assembly 444 through the burette 443. The atomizing nozzle assembly 444 will atomize the oil droplets. The air extruded from the air supply pipe 448 will enter the atomizing nozzle assembly 444 and then be sprayed out from the outlet of the atomizing nozzle assembly 444 onto the valve stem of the stop valve 3, so as to play a lubricating role and form an oil film on the surface of the stop valve 3, further isolating the direct erosion of air. In this way, it can avoid the problem that the stop valve 3 rusts and ages with the increase of the service life and causes air leakage in the stop valve 3; S4: During the process of the upper housing 41 and the lower housing 42 being installed in alignment, one can manually hold the arc handle 54 to drive the internally threaded adjusting cylinder 53 to rotate, thereby adjusting the distance between the threaded rod 52 and the internally threaded adjusting cylinder 53, and further adjusting the distance between the lower housing 42 and the support base plate 51, so that after the upper housing 41 and the lower housing 42 are installed, they are in a horizontal position, so as to adapt to the installation environment of different terrains.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A natural gas outdoor pipeline, comprising a pressure regulating assembly (1), wherein the gas outlet of the pressure regulating assembly (1) is connected to a gas transmission pipeline (2) via a flange, a stop valve (3) is provided between the two connected gas transmission pipelines (2), and the stop valve (3) and the gas transmission pipeline (2) are connected via a flange, wherein: The stop valve (3) is provided with a protection component (4) on the outside, and an adjustment component (5) is provided at the lower end of the protection component (4); The protection component (4) comprises: An upper housing (41), wherein the upper housing (41) is disposed above the stop valve (3); A lower housing (42), wherein the lower housing (42) is disposed below the stop valve (3), and the lower housing (42) and the upper housing (41) are used in conjunction with each other and are fixedly connected by fastening bolts to form a closed space; An L-shaped mounting plate (43) is symmetrically mounted on the lateral outer side wall of the upper shell (41), and an arc-shaped through groove is opened on the side wall of the L-shaped mounting plate (43); An atomizing unit (44), wherein the atomizing unit (44) is symmetrically arranged at the upper end of the interior of the upper shell (41), and the atomizing unit (44) is directly opposite to the valve stem of the stop valve (3); An inspection connection unit (45), wherein the inspection connection unit (45) is fixedly mounted on the outer side wall of the L-shaped mounting plate (43) corresponding to the upper shell (41), and the inspection connection unit (45) is fixedly connected to the atomization unit (44); The inspection assembly (46) is fixedly connected to the end of the inspection connection unit (45) away from the side wall of the upper shell (41), the lower end of the inspection assembly (46) is attached to the outer wall of the gas transmission pipeline (2), and the inspection assembly (46) is located on the side of the L-shaped mounting plate (43) away from the upper shell (41).

2. A natural gas outdoor pipeline according to claim 1, characterized in that: A sealing strip (421) is provided between the upper shell (41) and the lower shell (42).

3. A natural gas outdoor pipeline according to claim 2, characterized in that: Sealing rings (422) are installed at positions of the upper shell (41) and the lower shell (42) close to the ends and in contact with the gas pipeline (2).

4. A natural gas outdoor pipeline according to claim 3, characterized in that: A knob (411) is slidably provided in the middle of the upper end surface of the upper shell (41), and the lower end of the knob (411) is slidably engaged with the upper end of the valve stem of the stop valve (3). When the two are engaged, the knob (411) can control the opening and closing of the stop valve (3). An abutment spring (412) is sleeved on the outer side of the valve stem of the stop valve (3), and the upper end of the abutment spring (412) is tightly abutted against the lower end surface of the knob (411).

5. A natural gas outdoor pipeline according to claim 1, characterized in that: The atomizing unit (44) comprises an oil supply bottle (441), the oil supply bottle (441) being fixedly mounted at a position near the edge of the upper end of the upper shell (41), the oil outlet pipe of the oil supply bottle (441) extending into the interior of the upper shell (41) and being fixedly mounted with an electromagnetic burette valve (442), a burette (443) being mounted at the lower end of the electromagnetic burette valve (442), the lower end of the burette (443) being connected to an atomizing nozzle assembly (444), and a nozzle assembly (444) being fixedly mounted on the inner wall of the upper shell (41). An L-shaped rod (445) is fixedly installed, an L-shaped cavity is opened inside the L-shaped rod (445), a piston rod (446) is slidably installed inside the L-shaped cavity via a first spring (447), the end of the piston rod (446) away from the first spring (447) extends to the outside of the upper shell (41) and is fixedly connected to the inspection connection unit (45), and an air supply pipe (448) is connected to the upper end of the L-shaped cavity, and the air supply pipe (448) is connected to the inside of the atomizing nozzle assembly (444).

6. A natural gas outdoor pipeline according to claim 5, characterized in that: The described inspection connection unit (45) includes a lining plate (451). Lining plates (451) are symmetrically arranged on the side walls of the L-shaped mounting plate (43) corresponding to the upper housing (41). A chute (452) is formed in the lining plate (451). A U-shaped plate (453) is slidably mounted in the chute (452) through a second spring (454). A wire wheel (455) is rotatably mounted on the opposite side walls of the U-shaped plate (453) through a torsion spring. A towing rope (456) is wound around the wire wheel (455). The end of the towing rope (456) passes through the arc-shaped through groove on the L-shaped mounting plate (43) and is fixedly tied to the inspection assembly (46).

7. A natural gas outdoor pipeline according to claim 6, characterized in that: The stiffness coefficient of the described second spring (454) is greater than that of the first spring (447). When a person pulls the inspection assembly (46) to move along the outer wall of the gas transmission pipeline (2), before the towing rope (456) is unreeled to the maximum limit, the U-shaped plate (453) will not drive the piston rod (446) to move.

8. The outdoor natural gas pipeline according to claim 1, characterized in that: The described adjustment assembly (5) includes an internally threaded adjustment cylinder (53). The internally threaded adjustment cylinder (53) is rotatably mounted in the middle of the lower end surface of the lower housing (42). Arc-shaped handles (54) are symmetrically mounted on the outer side wall of the internally threaded adjustment cylinder (53). A threaded rod (52) is screwed inside the internally threaded adjustment cylinder (53). The lower end of the threaded rod (52) is fixedly connected to a support bottom plate (51).

9. A natural gas outdoor pipeline rupture detection system, characterized in that: The described rupture detection system includes: An image acquisition module: used to acquire images of the surface of the gas transmission pipeline (2); An image analysis module: processes, analyzes, and transmits the acquired images; A rupture detection module: identifies the images transmitted by the image analysis module to determine whether there are abnormalities in the gas transmission pipeline (2), where pipeline abnormalities at least include: pipeline rupture, pipeline corrosion; An alarm module: immediately issues an alarm when an abnormality is detected on the surface of the gas transmission pipeline (2); A data recording and storage module: used to store the data and information during the entire detection process.

10. A natural gas outdoor pipeline rupture detection system according to claim 9, characterized in that: The described rupture detection system further includes: A sensor data acquisition module: The sensor data acquisition module receives the pipeline data d1 monitored by the sensors on the pipeline and sends it to the sensor data analysis module and the storage module. The pipeline data at least includes: pipeline pressure, pipeline temperature; A sensor data analysis module: The sensor data analysis module receives the pipeline data d1 of all sensors and compares it with a preset threshold thresh1. When d1 > thresh1, the alarm module issues an alarm.

11. A natural gas outdoor pipeline rupture detection system according to claim 10, characterized in that: The sensor data analysis module also performs trend prediction on the historical data stored in the memory, subtracts the trend prediction result d2 from the sensor pipeline data d1 and compares it with the preset threshold thresh2. When the alarm module sounds an alarm.

12. A natural gas outdoor pipeline rupture detection system according to claim 11, characterized in that: The described rupture detection system also integrates the results of image analysis, rupture detection, and sensor analysis for storage and sends them to the terminal display module for visual display. The display methods at least include: computer terminal and mobile terminal.

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