CN115405868A - Tunnel water supply pipeline monitoring device and monitoring method thereof - Google Patents
Tunnel water supply pipeline monitoring device and monitoring method thereof Download PDFInfo
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- CN115405868A CN115405868A CN202211039010.7A CN202211039010A CN115405868A CN 115405868 A CN115405868 A CN 115405868A CN 202211039010 A CN202211039010 A CN 202211039010A CN 115405868 A CN115405868 A CN 115405868A
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- 238000009434 installation Methods 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 4
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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
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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
Abstract
The invention relates to the technical field of pipeline detection, in particular to a tunnel water supply pipeline monitoring device and a monitoring method thereof, wherein the device comprises pipelines, a connecting pipe is arranged between adjacent pipelines, a flowmeter for monitoring the flow of a water body is installed on the connecting pipe, a first fixing sleeve is installed at the water outlet end of each pipeline, a second fixing sleeve is installed at the water inlet end of each pipeline, a circular groove is formed in the water outlet side of each first fixing sleeve, an annular groove for accommodating a telescopic pipe is formed in the step of the circular groove, an installation groove is uniformly formed in the outer side wall of each first fixing sleeve along the circumference, through holes for avoiding a traction rope are axially formed in the side wall of each installation groove, and a first inserting groove is formed in the step of each circular groove along the circumference; the tunnel water supply pipeline monitoring device provided by the invention can realize detection of pipeline leakage, can position the pipeline with leakage, is convenient for later maintenance work of maintenance personnel, and is suitable for further popularization and application.
Description
Technical Field
The invention relates to the technical field of pipeline monitoring, in particular to a tunnel water supply pipeline monitoring device and a monitoring method thereof.
Background
Tunnels are engineered structures buried in the ground, a form of human use of underground space. The tunnel can be divided into a traffic tunnel, a hydraulic tunnel, a municipal tunnel, a mine tunnel and the like. In order to facilitate the use of water in the tunnel, a corresponding water supply pipeline is usually laid in the tunnel. The existing water supply pipe water leakage monitoring is generally implemented through manual field investigation, and the investigation process is time-consuming and labor-consuming.
Disclosure of Invention
In order to solve the problems, the invention provides a tunnel water supply pipeline monitoring device and a monitoring method thereof.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a tunnel water supply pipeline monitoring device comprises pipelines, wherein a connecting pipe is arranged between every two adjacent pipelines, a flowmeter for monitoring the flow of water is arranged on the connecting pipe, a first fixing sleeve is arranged at the water outlet end of each pipeline, a second fixing sleeve is arranged at the water inlet end of each pipeline, a circular groove is formed in the water outlet side of each first fixing sleeve, an annular groove for accommodating a telescopic pipe is formed in the step of each circular groove, an installation groove is uniformly formed in the outer side wall of each first fixing sleeve along the circumference, through holes for avoiding empty traction ropes are formed in the side wall of each installation groove along the axial direction, and a first inserting groove is formed in the step of each circular groove along the circumference;
a second insertion groove is formed in the position, horizontally opposite to the first insertion groove, of the second fixing sleeve, two ends of the guide rod are inserted into the first insertion groove and the second insertion groove, a ring-shaped magnet is arranged on the side wall of the inner cavity of the water inlet side of the second fixing sleeve, and a grooved wheel is further arranged at the position, corresponding to the through hole, of the second fixing sleeve;
be provided with a slip ring in the circular slot, slip ring sliding connection just its shape phase-match of magnet on the wall shape of orientation magnet and the second fixed sleeve pipe side inner chamber lateral wall of intaking on the guide bar, be provided with multiunit electromagnetism bolt on the lateral wall of circular slot, the draw-in groove has been seted up on the lateral wall of slip ring and the corresponding position of electromagnetism bolt, the slip ring passes through the electromagnetism bolt to be fixed in the circular slot, be provided with a flexible pipe in the annular groove, the one end of flexible pipe is sealed to be fixed in annular groove bottom, and the other end is sealed to be fixed in on the slip ring, install winding mechanism in the mounting groove, winding mechanism is connected to haulage rope one end, and the other end is worn out the through-hole and is walked around the sheave that corresponds the position and is fixed in on the lateral wall of slip ring.
Furthermore, the first fixing sleeve and the second fixing sleeve are respectively fixed at the water outlet end and the water inlet end of the pipeline through bolts, and two ends of the linking pipe are respectively and fixedly connected with the pipeline, the first fixing sleeve and the second fixing sleeve through bolts and nuts.
Furthermore, the water inlet sides of the first fixed sleeve and the second fixed sleeve are in a horn shape with a large outside and a small inside.
Furthermore, a rubber layer is arranged on the outer side wall of the magnet.
Furthermore, at least two groups of electromagnetic bolts are arranged.
Furthermore, annular rubber rings are arranged between the connecting pipe and the first fixing sleeve and between the connecting pipe and the second fixing sleeve.
Furthermore, a sealing rubber ring is also arranged between the inner wall of the pipeline and the outer wall of the first fixed sleeve.
The invention further provides a tunnel water supply pipeline monitoring method, which comprises the following steps:
1) Respectively monitoring the flow of the water inlet end and the water outlet end of each pipeline through flow meters at the two ends of each pipeline;
2) Calculating the flow difference of two ends of each pipeline, and judging whether the flow difference of two ends of each pipeline is greater than a first preset threshold value or not;
3) When the flow difference between two ends of a certain pipeline is larger than a first preset threshold value, an electromagnetic bolt on a first fixing sleeve at the water outlet end of the pipeline is drawn out from a clamping groove on a sliding ring, a winding mechanism winds the sliding ring, the sliding ring moves towards a magnet along a guide rod under the driving of a traction rope, and the magnet is fixed by magnetic adsorption after being contacted with the sliding ring;
4) The flow rate difference of the fixed flow rate is greater than the flow rate of the water outlet end of the pipeline with the first preset threshold value, the flow rate difference of two adjacent flow rates is calculated, and whether the calculated flow rate difference is greater than a second preset threshold value is judged; if yes, judging that the pipeline with the flow difference larger than a first preset threshold value leaks; if not, judging that the connection pipe on the water outlet side of the pipeline with the flow difference larger than the first preset threshold value leaks.
Further, the condition that the pipeline leaks in the step 4) comprises the following steps: a) Leakage of the pipeline occurs; b) The connection of the adapter tube on the water inlet side of the pipe to the pipe is subject to leakage.
Further, the case where the adapter tube leaks in step 4) includes: a) Leakage of the adapter tube occurs; b) The flow difference is larger than a first preset threshold value, and leakage occurs at the joint of the pipeline and the connecting pipe.
The invention has the beneficial effects that:
the tunnel water supply pipeline monitoring device provided by the invention can realize detection of pipeline leakage, can position the pipeline with leakage, is convenient for later maintenance work of maintenance personnel, and is suitable for further popularization and application.
Drawings
FIG. 1 is a schematic view of the structure of the present invention; (wherein the arrows indicate the direction of water flow)
Fig. 2 is a sectional view of the slide ring in abutment with the magnet;
FIG. 3 is a schematic view of the sliding ring abutting against the magnet;
FIG. 4 is a schematic view of the engagement tube, the first retaining bushing and the second retaining bushing in combination;
FIG. 5 is a partial schematic view of the second retaining sleeve side of the present invention;
FIG. 6 is a partial schematic view of the side of a first retaining sleeve of the present invention;
FIG. 7 is a schematic structural view of a second locking bushing;
fig. 8 is a schematic structural view of the first locking bushing.
The reference numbers in the figures are as follows:
a conduit-1; a connecting pipe-2; a flow meter-3; a first fixed sleeve-4; a second fixed sleeve-5; a guide rod-6; a magnet-7; a slip ring-8; an electromagnetic bolt-9; a telescopic pipe-10; a winding mechanism-11; a sheave-12; a hauling rope-13; a circular groove-41; an annular groove-42; a mounting groove-43; a through-hole-44; a first plug-in slot-45; a second mating groove-51.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the attached drawing 1, the monitoring device for the tunnel water supply pipeline is electrically connected with an external control system and comprises pipelines 1, a connecting pipe 2 is arranged between every two adjacent pipelines 1, a flowmeter 3 used for monitoring the flow of water is installed on the connecting pipe 2, and data detected by the flowmeter 3 is sent to the external control system through a wired or wireless communication module. A first fixed sleeve 4 is arranged at the water outlet end of the pipeline 1, and a second fixed sleeve 5 is arranged at the water inlet end of the pipeline 1. The side of intaking of first fixed sleeving 4 and second fixed sleeving 5 all is the loudspeaker form of big-end-up, and this kind of setting can play the effect of guide water flow direction.
Referring to fig. 8, a circular groove 41 is formed at a water outlet side of the first fixing sleeve 4, an annular groove 42 for accommodating the telescopic tube 10 is formed at a step of the circular groove 41, an installation groove 43 is uniformly formed on an outer side wall of the first fixing sleeve 4 along a circumference, a through hole 44 for the empty-avoiding traction rope 13 is axially formed on a side wall of the installation groove 43, and a first insertion groove 45 is formed at the step of the circular groove 41 along the circumference.
Referring to fig. 7, a second insertion groove 51 is formed in a position where the second fixing sleeve 5 is horizontally opposite to the first insertion groove 45, two ends of the guide rod 6 are inserted into the first insertion groove 45 and the second insertion groove 51, a ring-shaped magnet 7 is arranged on the inner cavity side wall of the water inlet side of the second fixing sleeve 5, a grooved pulley 12 is further arranged at a position where the second fixing sleeve 5 corresponds to the through hole 44, and the grooved pulley 12 is rotatably connected to the second fixing sleeve 5 through a middle rotating shaft.
Referring to fig. 1 and 4, a sliding ring 8 is disposed in the circular groove 41, wherein the sliding ring 8 may be made of steel with an anticorrosive paint coated on the surface; the working of plastics also can be selected for use to slip ring 8, and the working of plastics is provided with the metal level that can be adsorbed by magnet towards the lateral wall of magnet 7 on, and the metal level surface can further coat anticorrosive coating. Slip ring 8 sliding connection is on guide bar 6 and its wall shape towards magnet 7 and the second fixed sleeving 5 intake the shape phase-match of magnet 7 on the side inner chamber lateral wall, is provided with multiunit electromagnetism bolt 9 on the lateral wall of circular slot 41, and wherein, electromagnetism bolt 9 sets up two sets ofly at least, and electromagnetism bolt 9 evenly sets up along the lateral wall of circular slot 41. The side wall of the sliding ring 8 corresponding to the electromagnetic bolt 9 is provided with a clamping groove, the sliding ring 8 is fixed in the circular groove 41 through the electromagnetic bolt 9, the annular groove 42 is internally provided with an extension tube 10, one end of the extension tube 10 is fixed at the bottom of the annular groove 42 in a sealing manner, the other end of the extension tube 10 is fixed on the sliding ring 8 in a sealing manner, the installation groove 43 is internally provided with a winding mechanism 11, one end of a traction rope 13 is connected with the winding mechanism 11, and the other end of the traction rope penetrates out of the through hole 44 to bypass the sheave 12 corresponding to the position and is fixed on the outer side wall of the sliding ring 8. (refer to the attached figure 1) because the water flow direction is towards the left, the rolling mechanism 11 is arranged in the first fixed sleeve 4 positioned at the water outlet side of the pipeline, so that the water body can be prevented from washing the rolling mechanism 11.
Wherein, winding mechanism 11 is optional to use clockwork spring mechanism, and wherein in clockwork spring middle part is fixed in mounting groove 43, clockwork spring end connection haulage rope 13, when electromagnetic bolt 9 was taken out in 8 draw-in grooves of slip ring, slip ring 8 moved towards magnet 7 under the drive of clockwork spring to pull out flexible pipe 10 from annular groove 42, through magnetic attraction when slip ring 8 and magnet 7 contact. In this way, the connection between two adjacent pipelines 1 can be realized. When the joint pipe 2 leaks, the two pipelines 1 can be connected in the above way for emergency use. After the use, the sliding ring 8 can be pushed into the circular groove 41 again, and then the electromagnetic bolt 9 is controlled to be inserted into the clamping groove on the side wall of the sliding ring 8 to realize fixation, so that the repeated use is realized. The winding mechanism 11 can also select a motor and a winding roll to draw the traction rope 13. In addition, the device provided by the invention is a detachable device, can be installed on a traditional pipeline for use, and has strong adaptability.
Referring to fig. 1-3, the first fixing sleeve 4 and the second fixing sleeve 5 are both fixed to the water outlet end and the water inlet end of the pipeline 1 by bolts, and the two ends of the linking pipe 2 are respectively fixed to the pipeline 1, the first fixing sleeve 4 and the second fixing sleeve 5 by bolts and nuts.
As a further improvement, a rubber layer (not shown in the drawings) is further disposed on the outer side wall of the magnet 7, and the rubber layer is pressed when the sliding ring 8 and the magnet 7 are attracted by magnetic force, so that the sealing performance of the abutment of the second fixing sleeve 5 and the sliding ring 8 can be improved.
As a further improvement, annular rubber rings (not shown in the drawing) are arranged between the adapter tube 2 and the first fixing sleeve 4 and between the adapter tube 2 and the second fixing sleeve 5; to improve the sealing property of the connection of both ends of the connecting pipe 2.
As a further improvement, a sealing rubber ring (not shown in the attached drawings) is also arranged between the inner wall of the pipeline 1 and the outer wall of the first fixed sleeve 4; so as to improve the sealing performance of the installation of the first fixing sleeve 4 and the pipeline 1 and prevent the water body from entering the installation groove 43.
The embodiment further provides a method for monitoring a tunnel water supply pipeline, which comprises the following steps:
1) Respectively monitoring the flow of the water inlet end and the water outlet end of each pipeline 1 through flow meters 3 at the two ends of each pipeline 1;
2) Calculating the flow difference between the two ends of each pipeline 1 (the flow difference is the water inlet flow of the pipeline minus the water outlet flow of the pipeline), and judging whether the flow difference between the two ends of each pipeline 1 is greater than a first preset threshold value; the flow rates at two ends of the same pipeline are basically the same, only small fluctuation errors exist, when the inflow flow rate is obviously larger than the outflow flow rate, pipeline leakage is possible to happen at the moment, and therefore whether the pipeline leaks or not can be judged by comparing the flow rate difference at the two ends of the pipeline.
3) When the flow difference between two ends of a certain pipeline 1 is larger than a first preset threshold value, an electromagnetic bolt 9 on a first fixing sleeve 4 at the water outlet end of the pipeline 1 is drawn out from a clamping groove on a sliding ring 8, a winding mechanism 11 is used for winding, the sliding ring 8 is driven by a traction rope 13 to move towards a magnet 7 along a guide rod 6, and the magnet 7 is fixed by magnetic adsorption after being contacted with the sliding ring 8; i.e. the sliding ring 8 on the outlet side of the conduit 1 with a flow difference greater than a first predetermined threshold is connected to the second fixed sleeve 5.
After the sliding ring 8 is connected to the second fixed sleeve 5, there is substantially no reading on the connecting tube 2 on the water outlet side of the pipe 1, because the water flowing out of the first fixed sleeve 4 flows into the second fixed sleeve 5 through the telescopic tube 10 and the sliding ring 8. Therefore, the flow data of two adjacent flow meters 3 at the left and right of the non-reading flow meter 3 are read and the flow difference is calculated, if the calculated flow difference is recovered to be normal (namely the calculated flow difference is smaller than a second preset threshold), the connection pipe 2 at the water outlet side of the pipeline 1 is judged to be leaked (because the sliding ring 8 is connected with the second fixed sleeve 5, the connection pipe 2 which is leaked is repaired, and the calculated flow difference data is recovered to be normal); if the calculated flow difference is larger than the second preset threshold (that is, the water pipe is still in a leakage state and does not return to a normal state), it can be determined that the pipeline 1 leaks (when the leakage of the connecting pipe 2 on the water falling side is eliminated, it is only possible that the flow difference is larger than the first preset threshold at this time that the pipeline 1 leaks).
4) The flow rate difference of the fixed flow rate is greater than the flow rate meter 3 at the water outlet end of the first preset threshold value pipeline 1, the flow rate difference between the two adjacent flow rate meters 3 is calculated, and whether the calculated flow rate difference is greater than a second preset threshold value is judged; if yes, judging that the pipeline 1 with the flow difference larger than a first preset threshold value leaks; if not, judging that the connection pipe 2 on the water outlet side of the pipeline 1 with the flow difference larger than the first preset threshold value leaks.
Wherein, the condition that pipeline 1 leaks includes: a) Leakage occurs in the pipeline 1; b) A leakage occurs at the connection of the adapter tube 2, which is located at the water inlet side of the pipe 1, to the pipe 1. The case where the adapter tube 2 leaks includes: a) The connecting pipe 2 at the water outlet side of the pipeline 1 with the flow difference larger than the first preset threshold value leaks; b) The joint of the pipeline 1 and the connecting pipe 2 at the water outlet side has leakage when the flow difference is larger than the first preset threshold value. The first threshold value and the second threshold value are obtained based on a flow rate difference monitored when the water supply pipe supplies water normally, and are multiplied by a deviation coefficient (the coefficient is an empirical value).
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A tunnel water supply pipeline monitoring device comprises pipelines (1) and is characterized in that a connecting pipe (2) is arranged between adjacent pipelines (1), a flow meter (3) for monitoring water flow is mounted on the connecting pipe (2), a first fixing sleeve (4) is mounted at the water outlet end of the pipeline (1), a second fixing sleeve (5) is mounted at the water inlet end of the pipeline (1), a circular groove (41) is formed in the water outlet side of the first fixing sleeve (4), an annular groove (42) for accommodating a telescopic pipe (10) is formed in the step of the circular groove (41), mounting grooves (43) are uniformly formed in the outer side wall of the first fixing sleeve (4) along the circumference, through holes (44) for avoiding empty traction ropes (13) are formed in the side wall of the mounting grooves (43) along the axial direction, and first inserting grooves (45) are formed in the step of the circular groove (41) along the circumference;
a second inserting groove (51) is formed in the position, horizontally opposite to the first inserting groove (45), of the second fixing sleeve (5), two ends of the guide rod (6) are inserted into the first inserting groove (45) and the second inserting groove (51), a ring-shaped magnet (7) is arranged on the side wall of the inner cavity of the water inlet side of the second fixing sleeve (5), and a grooved wheel (12) is further arranged in the position, corresponding to the through hole (44), of the second fixing sleeve (5);
be provided with a slip ring (8) in circular slot (41), slip ring (8) sliding connection is on guide bar (6) and its wall shape towards magnet (7) and the shape phase-match of magnet (7) on the second fixed sleeving (5) side inner chamber lateral wall of intaking, be provided with multiunit electromagnetism bolt (9) on the lateral wall of circular slot (41), the draw-in groove has been seted up on slip ring (8) and the lateral wall of electromagnetism bolt (9) corresponding position, slip ring (8) are fixed in circular slot (41) through electromagnetism bolt (9), be provided with a flexible pipe (10) in annular groove (42), the one end sealing fixation in annular groove (42) bottom of flexible pipe (10), the other end sealing fixation in slip ring (8), install rolling mechanism (11) in rolling mounting groove (43), winding mechanism (11) are connected to haulage rope (13) one end, and the other end wears out through-hole (44) and walks around sheave (12) that correspond the position and be fixed in on the lateral wall of slip ring (8).
2. The device for monitoring the water supply pipeline in the tunnel according to claim 1, wherein the first fixing sleeve (4) and the second fixing sleeve (5) are both fixed to the water outlet end and the water inlet end of the pipeline (1) by bolts, and the two ends of the connecting pipe (2) are fixedly connected to the pipeline (1) and the first fixing sleeve (4) and the second fixing sleeve (5) by bolts and nuts.
3. The device for monitoring the water supply pipeline of the tunnel according to claim 1, wherein the water inlet sides of the first fixing sleeve (4) and the second fixing sleeve (5) are in a horn shape with a large outside and a small inside.
4. The device for monitoring the tunnel water supply pipeline according to claim 1, wherein a rubber layer is further arranged on the outer side wall of the magnet (7).
5. A tunnel water supply pipeline monitoring device according to claim 1, wherein at least two sets of electromagnetic bolts (9) are provided.
6. A tunnel water supply pipeline monitoring device according to claim 1, characterized in that annular rubber rings are arranged between the adapter tube (2) and the first fixing sleeve (4) and between the adapter tube (2) and the second fixing sleeve (5).
7. The device for monitoring the tunnel water supply pipeline according to claim 6, wherein a sealing rubber ring is also arranged between the inner wall of the pipeline (1) and the outer wall of the first fixing sleeve (4).
8. A method for monitoring a tunnel water supply pipeline is characterized by comprising the following steps:
1) The flow of the water inlet end and the water outlet end of each pipeline (1) are respectively monitored through flow meters (3) at the two ends of the pipeline (1);
2) Calculating the flow difference of the two ends of each pipeline (1), and judging whether the flow difference of the two ends of each pipeline (1) is greater than a first preset threshold value or not;
3) When the flow difference between two ends of a certain pipeline (1) is larger than a first preset threshold value, an electromagnetic bolt (9) on a first fixing sleeve (4) at the water outlet end of the pipeline (1) is drawn out from a clamping groove on a sliding ring (8), a winding mechanism (11) winds the pipeline, the sliding ring (8) moves towards a magnet (7) along a guide rod (6) under the drive of a traction rope (13), and the magnet (7) is fixed by magnetic adsorption after being contacted with the sliding ring (8);
4) The flow rate difference of the fixed flow rate is greater than the flow rate meter (3) at the water outlet end of the pipeline (1) with the first preset threshold value, the flow rate difference between the two adjacent flow rate meters (3) is calculated, and whether the calculated flow rate difference is greater than the second preset threshold value is judged; if yes, judging that the pipeline (1) with the flow difference larger than a first preset threshold value leaks; if not, judging that the flow difference is larger than the leakage of the connecting pipe (2) at the water outlet side of the first preset threshold value pipeline (1).
9. The method for monitoring a tunnel water supply pipeline according to claim 8, wherein the step 4) of detecting a leakage in the pipeline (1) comprises the steps of: a) The pipeline (1) leaks; b) The joint of the connecting pipe (2) positioned at the water inlet side of the pipeline (1) and the pipeline (1) leaks.
10. The method for monitoring a tunnel water supply pipeline according to claim 8, wherein the condition that the connecting pipe (2) leaks in the step 4) comprises the following steps: a) Leakage of the adapter tube (2) occurs; b) The flow difference is larger than a first preset threshold value, and leakage occurs at the joint of the pipeline (1) and the connecting pipe (2).
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| CN202211039010.7A CN115405868A (en) | 2022-08-29 | 2022-08-29 | Tunnel water supply pipeline monitoring device and monitoring method thereof |
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| CN111022938A (en) * | 2019-12-12 | 2020-04-17 | 上海邦芯物联网科技有限公司 | System for accurately positioning water leakage point of underground water pipe |
| CN212298588U (en) * | 2020-04-07 | 2021-01-05 | 福建巨联建筑科技股份有限公司 | Pipeline detection device for municipal administration |
| CN213576210U (en) * | 2020-09-10 | 2021-06-29 | 海宁管丽科技新材料有限公司 | High joint strength concatenation formula inside lining restoration pipe |
| CN214790539U (en) * | 2021-02-08 | 2021-11-19 | 李飞 | Online corrosion monitoring device for natural gas pipeline |
| CN215635687U (en) * | 2021-09-15 | 2022-01-25 | 山东华锐波纹管有限公司 | Vacuum anti-leakage corrugated pipe |
| CN114383052A (en) * | 2022-01-10 | 2022-04-22 | 南昌县供水有限责任公司 | Online leakage-detecting water supply pipeline system and online leakage monitoring method |
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