CN115560253A - Natural gas pipeline leakage detection system and detection method - Google Patents
Natural gas pipeline leakage detection system and detection method Download PDFInfo
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- CN115560253A CN115560253A CN202211330063.4A CN202211330063A CN115560253A CN 115560253 A CN115560253 A CN 115560253A CN 202211330063 A CN202211330063 A CN 202211330063A CN 115560253 A CN115560253 A CN 115560253A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 170
- 238000001514 detection method Methods 0.000 title claims abstract description 124
- 239000003345 natural gas Substances 0.000 title claims abstract description 84
- 239000002184 metal Substances 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 239000003550 marker Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 3
- 229920006362 Teflon® Polymers 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/42—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters with arrangement for propelling the support stands on wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a natural gas pipeline leakage detection system and a detection method, and belongs to the technical field of pipeline detection. The utility model provides a natural gas line leakage detection system, includes detecting tube and natural gas line body, still includes: the limiting ring is provided with a traveling mechanism; the detection device comprises a rail, a sliding piece is arranged on the rail in a sliding mode, a detection box is arranged on the sliding piece, and a first motor is arranged in the detection box; a supporting plate is arranged in the detection box, a signal amplifier and a controller are arranged on the supporting plate, and the signal amplifier and the controller are connected through a lead; the marking mechanism comprises a warning lamp and a marking rod, wherein the input ends of the warning lamp and the marking rod are respectively connected with the signal amplifier through a lead and an electromagnetic assembly, so that on one hand, the warning lamp is lightened to remind a detector; on the other hand, the electromagnet is electrified to generate magnetism, the closer to the leakage point, the larger the current is, the stronger the magnetic force is, the electromagnet adsorbs the metal column, so that the metal column pulls the marking rod to slide downwards, and the marking rod marks the leakage position.
Description
Technical Field
The invention relates to the technical field of natural gas pipeline detection, in particular to a natural gas pipeline leakage detection system and a detection method.
Background
The natural gas refers to all gases naturally existing in nature, including gases formed in various natural processes in an atmospheric space, a water space and a rock space, and includes oil field gas, gas field gas, mud volcanic gas, coal bed gas, biogenetic gas and the like.
With the increasing importance of fuel gas in life, people pay more and more attention to the safety and environmental protection of the fuel gas pipeline, the pipeline for conveying the natural gas is very important, and whether leakage occurs in the pipeline needs to be detected regularly.
At present, to natural gas line leakage detection, still use the artifical mode of patrolling and examining of tradition regularly to be the main, the detection means mainly includes that the people's ear differentiates the leak point sound, sprays soap water and portable methane detection appearance etc. has huge hidden danger to patrolling and examining personnel's safety work, consequently need urgently to design a natural gas line leakage detection system.
Disclosure of Invention
The invention aims to solve the problem that the traditional manual regular inspection mode in the prior art has great hidden danger to the safety operation of inspectors, and provides a natural gas pipeline leakage detection system and a detection method.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a natural gas line leakage detection system, includes detecting tube and natural gas line body, still includes: the limiting ring is slidably arranged in the detection pipe, and a travelling mechanism is arranged on the limiting ring; the detection device comprises a track, a first motor and a second motor, wherein the track is fixedly arranged on a detection pipe close to one side of a limiting ring, a sliding part is arranged on the track in a sliding manner, a detection box is arranged on the sliding part, and the first motor for driving the sliding part to move is arranged in the detection box; a supporting plate is arranged in the detection box, a signal amplifier and a controller are arranged on the supporting plate, and the signal amplifier and the controller are connected through a lead; and the marking mechanism comprises a warning lamp and a marking rod, and the input ends of the warning lamp and the marking rod are respectively connected with the signal amplifier through a lead and an electromagnetic assembly.
In order to install the detection tube on the natural gas pipeline body, preferably, the detection tube includes two drive installing port and the rotatable semicircle boards that open and shut, two the department of opening and shutting of semicircle board homogeneous shaping design has the connecting plate, both sides run through between the connecting plate and install fastening bolt.
For the natural gas line body that walks around detects, preferably, the slider includes the last gyro wheel and the lower gyro wheel of block in the track both sides, go up through installing the arc between gyro wheel and the lower gyro wheel, the one side that the arc is close to the natural gas line body is installed and is detected the head, pass through signal connection between detection head and the signal amplifier.
In order to drive the marking rod to slide up and down in the detection box, preferably, the electromagnetic assembly comprises an electromagnet fixedly mounted on the support plate and a metal column slidably mounted in the detection box, the electromagnet is connected with the signal amplifier through a lead, and one end of the metal column, which is located outside the detection box, is fixedly connected with the marking rod.
In order to mark the leakage position, preferably, the upper end of the marking rod penetrates through the detection box and is fixedly provided with a limiting plate, and the lower end of the marking rod penetrates through the detection box and is fixedly provided with a printing head; the mark rod is sleeved with a first spring, and two ends of the first spring are fixedly connected with the limiting plate and the detection box respectively.
In order to reduce the vibration generated by the marking rod during sliding, furthermore, a circular groove hole for the marking rod to slide is formed in the supporting plate, a sliding block is fixedly installed on the inner side wall of the circular groove hole, and a linear groove matched with the sliding block is formed in the marking rod.
In order to provide pigment required by marking for the marking rod, furthermore, an extension plate is fixedly arranged below the detection box, a pair of support arms are rotatably arranged on the extension plate, one ends of the support arms, far away from the extension plate, are jointly and rotatably connected with a mud printing roller, and the mud printing roller is abutted against a printing head; and a pull rod is jointly installed on the pair of supporting arms, and a second spring is jointly connected between the pull rod and the bottom surface of the detection box.
In order to enable the device to move along the natural gas pipeline body in a walking mode, the walking mechanism further comprises a clamping plate rotatably installed in the installation port, an adjusting rod is rotatably connected between the clamping plate and the limiting ring, a clamping seat is fixedly installed at one end, far away from the limiting ring, of the clamping plate, a walking wheel is rotatably installed in the clamping seat, and a second motor for driving the walking wheel to rotate is installed on the clamping seat; and the arc-shaped plate is in threaded connection with an adjusting bolt, and the adjusting bolt is abutted to the limiting ring.
In order to detect a fine leakage position, preferably, a connecting ring is arranged at one end, away from the limiting ring, of the detection tube, a support rod is fixedly arranged between the connecting ring and the detection tube in an annular mode, and a bucket-shaped air inlet pipe and an air film are fixedly arranged between the adjacent support rods.
A detection method of a natural gas pipeline leakage detection system comprises the following operation steps:
step 1: buckling the detection pipe on the natural gas pipeline body, and enabling the walking device to clamp the natural gas pipeline body through the limiting ring so that the detection pipe and the natural gas pipeline body are in a coaxial state;
step 2: the sliding piece moves along the rail to detect whether the natural gas pipeline body leaks;
and step 3: when natural gas leaks, the detection head detects the leaked gas, the gas enables an electrochemical sensor in the detection head to generate current, the current enables an electromagnet to be electrified through a signal amplifier, the electrified electromagnet generates magnetic adsorption, a marking rod moves downwards, and the leakage position is marked;
and 4, step 4: when the sliding piece rounds a circle, the walking device is in a static state, the air film forms bulges at some tiny leakage positions, and whether the natural gas pipeline body leaks or not is judged by observing the air film.
Compared with the prior art, the invention provides a natural gas pipeline leakage detection system and a detection method, which have the following beneficial effects:
1. according to the natural gas pipeline leakage detection system, after gas leakage is detected, gas enters the sensor and reaches the electrodes through the Teflon film, different electrochemical reactions occur according to different gases, the natural gas is oxidized after reaching the electrodes, electrons flow to the polar plate from the working electrode through an external circuit through the oxidation reaction to form current, and the current is amplified through the signal amplifier, so that the warning lamp is turned on to remind a detector; on the other hand, the electromagnet is electrified to generate magnetism, the closer to the leakage point, the larger the current is, the stronger the magnetic force is, the electromagnet adsorbs the metal column, so that the metal column pulls the marking rod to slide downwards, and the marking rod marks the leakage part;
2. according to the natural gas pipeline leakage detection system, the adjusting bolt is rotated until the adjusting bolt abuts against the limiting ring, the limiting ring slides in the detection pipe, the sliding limiting ring pushes the clamping plate to rotate in the mounting port through the adjusting rod until the travelling wheel on the clamping plate abuts against the natural gas pipeline body, and the travelling wheel rotates under the driving of the second motor to drive the detection pipe to move on the natural gas pipeline body;
3. this natural gas line leak testing system, under the quiescent condition of second motor, the gas that some tiny departments of revealing on being located the natural gas line body revealed passes through the intake pipe and gets into in the air film, and the air film expands under gaseous packing, makes things convenient for the measurement personnel to observe.
Drawings
Fig. 1 is a schematic structural diagram of a natural gas pipeline leakage detection system according to the present invention;
fig. 2 is a schematic structural diagram of a traveling mechanism of a natural gas pipeline leakage detection system according to the present invention;
FIG. 3 is a schematic structural diagram of a marking mechanism of a natural gas pipeline leakage detection system according to the present invention;
FIG. 4 is a schematic structural diagram of a support plate of a natural gas pipeline leakage detection system according to the present invention;
FIG. 5 is a schematic diagram of a gas film structure of a natural gas pipeline leakage detection system according to the present invention;
fig. 6 is a schematic view of a mounting structure of a stop collar of a natural gas pipeline leakage detection system according to the present invention;
fig. 7 is a schematic structural diagram of a portion a in fig. 1 of a natural gas pipeline leakage detection system according to the present invention;
fig. 8 is a schematic structural diagram of a portion B in fig. 1 of a natural gas pipeline leakage detection system according to the present invention.
In the figure: 1. a detection tube; 101. an installation port; 102. a semicircular plate; 103. a connecting plate; 104. fastening a bolt; 2. a natural gas pipeline body; 3. a limiting ring; 4. a track; 5. an upper roller; 6. a detection box; 7. a first motor; 8. a signal amplifier; 9. a controller; 10. a warning light; 11. a marker post; 1101. a linear groove; 12. a support plate; 1201. a circular slot; 1202. a slider; 13. an electromagnet; 14. a limiting plate; 15. a print head; 16. a first spring; 17. an extension plate; 18. a support arm; 19. a printing roller; 20. a pull rod; 21. a second spring; 22. a metal post; 23. a clamping plate; 24. adjusting a rod; 25. a traveling wheel; 26. a second motor; 27. adjusting the bolt; 28. a lower roller; 29. an arc-shaped plate; 30. a detection head; 31. a gas film; 32. a clamping seat; 33. a connecting ring; 34. a support bar; 35. an air inlet pipe; 36. inserting a block; 37. a slot; 3701. a pressing port; 38. a third spring; 39. and pressing the block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1:
referring to fig. 1-8, a natural gas line leakage detection system, including test tube 1 and natural gas line body 2, specifically, refer to fig. 8, test tube 1 includes two drive installing port 101 and rotatable semicircle boards 102 that open and shut, the connected mode of two rotatable semicircle boards 102 that open and shut is articulated, and the vertical cross-section of the overall structure who constitutes between two semicircle boards 102 is circular, the department of opening and shutting of two semicircle boards 102 is the design of integrated shaping has connecting plate 103, run through between the connecting plate 103 of both sides and install fastening bolt 104, still include: and the limiting ring 3 is slidably mounted in the detection tube 1, and a traveling mechanism is mounted on the limiting ring 3.
The inner walls of the two semicircular plates 102 are provided with sliding grooves, and the limiting ring 3 is matched and slides in the sliding grooves.
Track 4, fixed mounting is on being close to the test tube 1 of spacing ring 3 one side, and slidable mounting has the slider on track 4, installs detection case 6 on the slider, installs the first motor 7 that drives the slider removal in the detection case 6.
With reference to fig. 1, 5 and 6, the sliding member of the present embodiment is further optimized.
The sliding part comprises an upper roller 5 and a lower roller 28 which are clamped on two sides of the track 4, the upper roller 5 and the lower roller 28 are clamped on the track 4, an arc-shaped plate 29 is arranged between the upper roller 5 and the lower roller 28, a detection head 30 is arranged on one surface of the arc-shaped plate 29 close to the natural gas pipeline body 2, and the detection head 30 is in signal connection with the signal amplifier 8; a supporting plate 12 is arranged in the detection box 6, a signal amplifier 8 and a controller 9 are arranged on the supporting plate 12, and the signal amplifier 8 is connected with the controller 9 through a lead; the marking mechanism comprises a warning lamp 10 and a marking rod 11, wherein the input ends of the warning lamp 10 and the marking rod 11 are respectively connected with the signal amplifier 8 through leads and electromagnetic components.
The electrochemical sensor is installed in the detection head 30, and the principle of the electrochemical sensor is that after external gas enters the gas detector, the gas enters the sensor and reaches the electrode through the teflon film, different electrochemical reactions occur according to different gases, and after the natural gas reaches the electrode, the natural gas is oxidized, electrons flow from the working electrode to the polar plate through an external circuit through the oxidation reaction, so that current is formed, and the current is in direct proportion to the gas concentration.
During the operation of the first motor 7, the output end of the first motor 7 drives the upper roller 5 to rotate, so that the arc plate 29 rotates along the circular track 4, and whether a gas leakage position exists on the natural gas pipeline body 2 is detected through the detection head 30.
It should be noted that the limiting ring 3 and the rail 4 are the same as the detection tube 1 and are both of an openable and closable structure with bilateral symmetry, and the difference is that an insert block 36 is fixedly mounted at one end of an opening of the limiting ring 3 and the rail 4, two sides of the insert block 36 are fixedly connected with a pressing block 39 through a third spring 38, a slot 37 matched with the insert block 36 is formed at the other end of the opening of the limiting ring 3 and the rail 4, a pressing opening 3701 matched with the pressing block 39 is formed in the inner side wall of the slot 37, when the insert block 36 is inserted into the slot 37, the pressing block 39 is embedded into the pressing opening 3701 under the action of the third spring 38, so that the limiting ring 3 and the rail 4 form a closed loop.
After gas leakage is detected, gas enters the sensor and reaches the electrodes through the Teflon film, different electrochemical reactions occur according to different gases, and after the natural gas reaches the electrodes, the natural gas is oxidized, electrons flow to the polar plate from the working electrode through an external circuit through the oxidation reaction to form current, and the current is amplified through the signal amplifier 8, so that the warning lamp 10 is lightened to remind a detector.
Referring to fig. 3, the electromagnetic assembly in the present scheme is further optimized.
The electromagnetic assembly comprises an electromagnet 13 fixedly mounted on the supporting plate 12 and a metal column 22 slidably mounted in the detection box 6, the electromagnet 13 is connected with the signal amplifier 8 through a lead, and one end of the metal column 22, which is positioned outside the detection box 6, is fixedly connected with the marking rod 11.
After the current is amplified by the signal amplifier 8, the electromagnet 13 is electrified to generate magnetism, the closer to the leakage point, the larger the current is, the stronger the magnetic force is, the electromagnet 13 adsorbs the metal column 22, so that the metal column 22 pulls the marking rod 11 to slide downwards, and the leakage part is marked by the marking rod 11.
Referring to fig. 3, the upper end of the marking rod 11 penetrates through the detection box 6 and is fixedly provided with a limiting plate 14, and the lower end of the marking rod 11 penetrates through the detection box 6 and is fixedly provided with a printing head 15; the marking rod 11 is sleeved with a first spring 16, and two ends of the first spring 16 are respectively fixedly connected with the limiting plate 14 and the detection box 6.
When the marking rod 11 is pulled by the metal column 22 to slide down, the printing head 15 contacts the surface of the natural gas pipe body 2 and prints a mark on the natural gas pipe body 2.
It should be noted that the controller 9 is electrically connected to the first motor 7, when the current in the detection head 30 is the maximum, the controller 9 controls the first motor 7 to stop working, so that the marking rod 11 marks the natural gas pipeline body 2, and after the marking rod 11 is reset under the action of the first spring 16, the controller 9 controls the first motor 7 to start working, so as to continue to detect.
Referring to fig. 4, further, a circular slot 1201 for the marking rod 11 to slide is formed in the support plate 12, a slider 1202 is fixedly mounted on an inner side wall of the circular slot 1201, and a linear slot 1101 matched with the slider 1202 is formed in the marking rod 11.
When the marker post 11 slides up and down, the slider 1202 restricts the sliding path of the marker post 11, reducing the vibration of the marker post 11 during sliding.
Referring to fig. 3, further, an extension plate 17 is fixedly installed below the detection box 6, a pair of support arms 18 is rotatably installed on the extension plate 17, one ends of the pair of support arms 18 far away from the extension plate 17 are jointly rotatably connected with a inkpad roller 19, and the inkpad roller 19 is abutted against the print head 15; a pull rod 20 is commonly mounted on the pair of supporting arms 18, and a second spring 21 is commonly connected between the pull rod 20 and the bottom surface of the detection box 6.
When the marking rod 11 slides downwards, the pair of supporting arms 18 are pressed to rotate, the supporting arms drive the inkpad rollers 19, which are abutted to the printing heads 15, to roll, so that the printing heads 15 are uniformly stained with inkpads, and the leakage positions on the natural gas pipeline body 2 of the printing heads 15 are marked.
Example 2:
referring to fig. 1 and 2, the same is basically the same as in embodiment 1, and further.
The travelling mechanism comprises a clamping plate 23 which is rotatably installed in the installation opening 101, an adjusting rod 24 is rotatably connected between the clamping plate 23 and the limiting ring 3, a clamping seat 32 is fixedly installed at one end, away from the limiting ring 3, of the clamping plate 23, travelling wheels 25 are rotatably installed in the clamping seat 32, and a second motor 26 which drives the travelling wheels 25 to rotate is installed on the clamping seat 32; the arc plate 29 is connected with an adjusting bolt 27 through threads, and the adjusting bolt 27 is abutted to the limiting ring 3.
Through rotatory adjusting bolt 27, until adjusting bolt 27 offsets with spacing ring 3, make spacing ring 3 slide in detecting tube 1, gliding spacing ring 3 promotes grip block 23 at installing port 101 internal rotation through adjusting pole 24, and until walking wheel 25 on the grip block 23 and natural gas line body 2 are inconsistent, under the drive of second motor 26, walking wheel 25 rotates, drives detecting tube 1 and moves on natural gas line body 2.
The controller 9 is electrically connected to the second motor 26, and when the current in the detection head 30 is the maximum, the controller 9 controls the second motor 26 to stop working, and the device stops moving.
Example 3:
referring to fig. 1 and 5, the same as embodiment 1, still further, is shown.
One end of the detection tube 1, which is far away from the limit ring 3, is provided with a connection ring 33, a support rod 34 which is arranged in an annular shape is fixedly installed between the connection ring 33 and the detection tube 1, and a bucket-shaped air inlet pipe 35 and an air film 31 are fixedly installed between adjacent support rods 34.
Under second motor 26's quiescent condition, be located on the natural gas line body 2 some tiny gas of revealing that the department reveals and pass through intake pipe 35 and get into gas film 31 in, gas film 31 expands under gaseous packing, makes things convenient for the measurement personnel to observe.
The opening of one end of the hopper-shaped air inlet pipe 35 close to the natural gas pipeline body 2 is larger than that of the other end
It should be noted that the connection ring 33 is mounted in the same manner as the stop ring 3 and the rail 4.
A detection method of a natural gas pipeline leakage detection system comprises the following operation steps:
step 1: buckling a detection pipe 1 on a natural gas pipeline body 2, and enabling a walking device to clamp the natural gas pipeline body 2 through a limiting ring 3, so that the detection pipe 1 and the natural gas pipeline body 2 are in a coaxial state;
step 2: the sliding piece moves along the track 4 to detect whether the natural gas pipeline body 2 leaks;
and step 3: when natural gas leaks, the detection head 30 detects the leaked gas, the gas enables an electrochemical sensor in the detection head 30 to generate current, the current enables the electromagnet 13 to be electrified through the signal amplifier 8, the electrified electromagnet 13 generates magnetic adsorption to mark the rod 11 to move downwards, and the leakage position is marked;
and 4, step 4: when the sliding piece circles for one circle, the walking device is in a static state, the air film 31 is formed at a plurality of tiny leakage positions to bulge, and whether the natural gas pipeline body 2 leaks or not is judged by observing the air film 31.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. The utility model provides a natural gas line leakage detection system, includes detecting tube (1) and natural gas line body (2), its characterized in that still includes:
the limiting ring (3) is slidably mounted in the detection tube (1), and a traveling mechanism is mounted on the limiting ring (3);
the detection device comprises a track (4) fixedly arranged on a detection tube (1) close to one side of a limiting ring (3), a sliding part is arranged on the track (4) in a sliding manner, a detection box (6) is arranged on the sliding part, and a first motor (7) for driving the sliding part to move is arranged in the detection box (6);
a supporting plate (12) is installed in the detection box (6), a signal amplifier (8) and a controller (9) are installed on the supporting plate (12), and the signal amplifier (8) is connected with the controller (9) through a lead;
the marking mechanism comprises a warning lamp (10) and a marking rod (11), wherein the input ends of the warning lamp (10) and the marking rod (11) are respectively connected with the signal amplifier (8) through a lead and an electromagnetic assembly.
2. The natural gas pipeline leakage detection system according to claim 1, wherein the detection pipe (1) comprises two semicircular plates (102) which drive the mounting opening (101) and can be opened and closed in a rotating mode, the opening and closing positions of the two semicircular plates (102) are integrally designed with connecting plates (103), and fastening bolts (104) penetrate through and are mounted between the connecting plates (103) on two sides.
3. The natural gas pipeline leakage detection system according to claim 1, wherein the sliding member comprises an upper roller (5) and a lower roller (28) which are clamped on two sides of the rail (4), an arc-shaped plate (29) is installed between the upper roller (5) and the lower roller (28), a detection head (30) is installed on one surface, close to the natural gas pipeline body (2), of the arc-shaped plate (29), and the detection head (30) is in signal connection with the signal amplifier (8).
4. The natural gas pipeline leakage detection system according to claim 1, wherein the electromagnetic assembly comprises an electromagnet (13) fixedly installed on the support plate (12) and a metal column (22) slidably installed in the detection box (6), the electromagnet (13) is connected with the signal amplifier (8) through a conducting wire, and one end of the metal column (22) located outside the detection box (6) is fixedly connected with the marking rod (11).
5. The natural gas pipeline leakage detection system according to claim 1, wherein the upper end of the marking rod (11) penetrates through the detection box (6) and is fixedly provided with a limiting plate (14), and the lower end of the marking rod (11) penetrates through the detection box (6) and is fixedly provided with a printing head (15);
the marking rod (11) is sleeved with a first spring (16), and two ends of the first spring (16) are fixedly connected with the limiting plate (14) and the detection box (6) respectively.
6. The natural gas pipeline leakage detection system according to claim 5, wherein the support plate (12) is provided with a circular groove hole (1201) for the marking rod (11) to slide, a sliding block (1202) is fixedly installed on the inner side wall of the circular groove hole (1201), and the marking rod (11) is provided with a linear groove (1101) matched with the sliding block (1202).
7. The natural gas pipeline leakage detection system according to claim 6, wherein an extension plate (17) is fixedly installed below the detection box (6), a pair of support arms (18) are rotatably installed on the extension plate (17), one ends of the pair of support arms (18) far away from the extension plate (17) are jointly and rotatably connected with a mud printing roller (19), and the mud printing roller (19) is abutted against the printing head (15);
a pull rod (20) is installed on the pair of supporting arms (18) together, and a second spring (21) is connected between the pull rod (20) and the bottom surface of the detection box (6) together.
8. The natural gas pipeline leakage detection system according to claim 3, wherein the walking mechanism comprises a clamping plate (23) rotatably mounted in the mounting opening (101), an adjusting rod (24) is rotatably connected between the clamping plate (23) and the limiting ring (3), a clamping seat (32) is fixedly mounted at one end of the clamping plate (23) far away from the limiting ring (3), a walking wheel (25) is rotatably mounted in the clamping seat (32), and a second motor (26) for driving the walking wheel (25) to rotate is mounted on the clamping seat (32);
and the arc-shaped plate (29) is connected with an adjusting bolt (27) through threads, and the adjusting bolt (27) is abutted to the limiting ring (3).
9. The natural gas pipeline leakage detection system according to claim 1, wherein a connecting ring (33) is arranged at one end of the detection pipe (1) far away from the limiting ring (3), support rods (34) which are arranged in an annular shape are fixedly arranged between the connecting ring (33) and the detection pipe (1), and a bucket-shaped air inlet pipe (35) and an air film (31) are fixedly arranged between the adjacent support rods (34).
10. A method of detecting a natural gas pipeline leakage detection system, using a natural gas pipeline leakage detection system according to any one of claims 1 to 9, the method comprising the steps of:
step 1: buckling a detection pipe (1) on a natural gas pipeline body (2), and enabling a walking device to clamp the natural gas pipeline body (2) through a limiting ring (3) so that the detection pipe (1) and the natural gas pipeline body (2) are in a coaxial state;
and 2, step: the sliding piece moves along the track (4) to detect whether the natural gas pipeline body (2) leaks or not;
and step 3: when natural gas leaks, the detection head (30) detects leaked gas, the gas enables an electrochemical sensor in the detection head (30) to generate current, the current enables an electromagnet (13) to be electrified through a signal amplifier (8), the electrified electromagnet (13) generates magnetic adsorption, a marking rod (11) moves downwards, and the leakage position is marked;
and 4, step 4: when the sliding piece circles one circle, the walking device is in a static state, the air film (31) forms bulges at some tiny leakage positions, and whether the natural gas pipeline body (2) leaks or not is judged by observing the air film (31).
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| CN115855838A (en) * | 2023-02-22 | 2023-03-28 | 南京信息工程大学 | Laser spectrum gas real-time scanning detection device |
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