CN116538440A - Device and method for monitoring blockage of pipeline in high-temperature area and dredging method - Google Patents
Device and method for monitoring blockage of pipeline in high-temperature area and dredging method Download PDFInfo
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- CN116538440A CN116538440A CN202310499462.1A CN202310499462A CN116538440A CN 116538440 A CN116538440 A CN 116538440A CN 202310499462 A CN202310499462 A CN 202310499462A CN 116538440 A CN116538440 A CN 116538440A
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- Prior art keywords
- pipeline
- pressure
- pressure value
- blockage
- pressure gauge
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012544 monitoring process Methods 0.000 title claims abstract description 17
- 230000000903 blocking effect Effects 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000012806 monitoring device Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000007 visual effect Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 11
- 239000010687 lubricating oil Substances 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 206010000369 Accident Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/18—Appliances for use in repairing pipes
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/24—Preventing accumulation of dirt or other matter in the pipes, e.g. by traps, by strainers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention provides a device, a method and a dredging method for monitoring the blockage of a pipeline in a high-temperature area, and relates to the technical field of pipeline blockage dredging. Through setting up the manometer on the pipeline, the form that the jam condition in with the pipeline passes through the pressure value carries out the visual embodiment, help discovering the jam condition in the pipeline early, pay attention to and intervene to the jam pipeline in advance, set gradually two at least valves on the pipeline, when the jam condition influences production safety, can close the valve, the pipeline keeps apart on line, realize the off-line mediation to the jam pipeline, and the operating condition of other pipelines beyond this pipeline is not influenced, can realize not shutting down the mediation jam pipeline, can effectively avoid the incident that causes because of the jam pipeline again.
Description
Technical Field
The invention relates to the technical field of pipeline blockage dredging, in particular to a blockage monitoring device and method for a pipeline in a high-temperature area and a dredging method.
Background
In the transmission process of the medium in the conveying pipeline, the problem of pipeline blockage can be unavoidable, when the pipeline blockage occurs, solid substances are deposited in the pipeline, and after the solid substances are deposited and accumulated in the pipeline to a certain extent, soft blockage pipes or complete blockage pipes can be formed, so that the medium can not be continuously conveyed, the normal operation of the conveying pipeline is hindered, potential safety hazards are easily formed, and even economic losses are caused. For example, in high-speed rotating equipment such as a gas turbine, a gas compressor and the like which are put into operation at present, radial support bearings are arranged in a high-temperature area (more than or equal to 360 ℃), and recently, fire accidents frequently occur in the type of equipment, because an oil return pipeline of the bearings in the high-temperature area is often blocked by carbon deposition, oil return is not smooth, oil mist is gathered and oozes out from a pipeline movable joint, a bearing seat and other parts, and heat preservation cotton is polluted, so that fire disaster occurs. Since carbon deposition of lubricating oil is difficult to avoid in bearings of gas turbines or compressors in high temperature areas, the oil return line of the bearings in the high temperature areas is often blocked by carbon deposition.
Disclosure of Invention
In view of the above drawbacks of the prior art, the present invention is directed to a device, a method and a dredging method for monitoring the blockage of a pipeline in a high temperature area, which are used for solving the problems of blockage and potential safety hazard of the pipeline in the high temperature area in the prior art.
To achieve the above and other related objects, the present invention provides a blockage monitoring apparatus for a high temperature area pipe, comprising:
the valve is used for opening or closing the pipeline, and at least two valves are sequentially arranged on the pipeline;
and the pressure gauge is arranged on the pipeline between the two valves.
Optionally, the pipeline between the two valves is a hose.
Optionally, the valve is a ball valve.
Optionally, a terminal for prompting is connected with the pressure gauge.
The invention provides a method for monitoring and dredging pipeline blockage in a high-temperature area, which comprises the following steps:
providing a blockage monitoring device for a high temperature area pipe as described above;
determining a blocking state in the pipeline through the pressure value displayed by the pressure instrument;
if the blocking state is blocking, closing the valve, isolating and disassembling the pipeline;
dredging the pipeline by using compressed air or nitrogen, and then reinstalling;
and opening the valve, and determining the blocking state of the pipeline through the pressure value displayed by the pressure instrument.
In an exemplary embodiment, determining the plugging status in the pipe by the pressure value displayed by the pressure gauge includes:
if the pressure value displayed by the pressure gauge is smaller than 0, the pipeline is at least partially unblocked;
and if the pressure value displayed by the pressure gauge is greater than or equal to 0, the pipeline is blocked.
In an exemplary embodiment, if the pressure gauge displays a pressure value less than 0, the pipe is at least partially unblocked, comprising:
if the pressure displayed by the pressure gauge is a normal negative pressure value, the pipeline is not blocked, and monitoring is continued;
if the pressure displayed by the pressure gauge is greater than the normal negative pressure value and less than 0, the pipeline is not blocked, and important attention is paid.
In an exemplary embodiment, determining the blocking status of the pipe by the pressure value displayed by the pressure gauge includes:
if the pressure gauge shows that the pressure is a normal negative pressure value, the pipeline is dredged;
if the pressure displayed by the pressure gauge is not a normal negative pressure value and is smaller than 0, the pipeline is at least partially dredged;
if the pressure displayed by the pressure gauge is greater than or equal to 0, the pipeline is not dredged.
In an exemplary embodiment, the normal negative pressure value is-3 kilopascals.
In an exemplary embodiment, the pressure gauge includes a remote pressure switch;
when the remote pressure switch monitors that the pressure value is a normal negative pressure value, continuing to monitor;
and when the remote pressure switch monitors that the pressure value is not the normal negative pressure value, a prompt message is sent out.
As described above, the device and the method for monitoring the blockage of the pipeline in the high-temperature area and the dredging method have the following beneficial effects: through setting up the manometer on the pipeline, the form that the jam condition in with the pipeline passes through the pressure value carries out the visual embodiment, help discovering the jam condition in the pipeline early, pay attention to and intervene to the jam pipeline in advance, set gradually two at least valves on the pipeline, when the jam condition influences production safety, can close the valve, the pipeline keeps apart on line, realize the off-line mediation to the jam pipeline, and the operating condition of other pipelines beyond this pipeline is not influenced, can realize not shutting down the mediation jam pipeline, can effectively avoid the incident that causes because of the jam pipeline again.
Drawings
Fig. 1 is a schematic structural diagram of a device for monitoring blockage of a pipeline in a high temperature area according to an embodiment of the invention.
Description of the reference numerals: 1. an oil outlet pipeline; 2. a valve; 3. a tributary pipeline; 4. a hose; 5. a terminal; 6. a reading pressure gauge; 7. a remote pressure switch; 8. a bearing; 9. and an oil return pipeline.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
Please refer to fig. 1. It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex. The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the claims. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
Fig. 1 is a schematic structural diagram of a high-temperature area pipe blockage detection device according to an embodiment of the present invention, referring to fig. 1, the present invention provides a blockage detection device for a high-temperature area pipe, which includes a valve 2 and a pressure gauge, wherein the valve 2 is used for opening or closing the pipe, at least two valves are sequentially disposed on the pipe, and the pressure gauge is disposed on the pipe between the two valves 2. In this embodiment, the above-mentioned pipeline is the tributary pipeline 3, the pipeline jam detection equipment of high temperature region (not less than 360 ℃) sets up in the tributary pipeline 3 department after the oil return of high temperature region bearing 8, lubricating oil gets into each tributary pipeline 3 after the oil outlet pipeline 1 branches, all be provided with the bearing 8 that needs lubricating oil to lubricate in each tributary pipeline 3 that is located the high temperature region, lubricating oil flows into the pipeline jam detection equipment of high temperature region after bearing 8, detect whether tributary pipeline 3 is blockked up through this equipment, then the lubricating oil that flows in tributary pipeline 3 returns the oil tank (not shown in the figure) through oil return pipeline 9 after condensing, realize the circulation of lubricating oil. Because the carbon deposition of the lubricating oil in the high-temperature area is difficult to avoid, the blockage detection equipment for the pipeline in the high-temperature area can intuitively embody the blockage condition of the branch pipeline 3 in a pressure value mode, so that a worker can detach, replace or dredge the branch pipeline 3 in time, the oil mist is prevented from gathering, and the occurrence of the fire accident of the bearing 8 can be effectively avoided. In other embodiments, the high temperature zone pipe blockage detection apparatus may be used in other applications, without limitation. Through setting up the manometer on tributary pipeline 3, the jam condition in the tributary pipeline 3 carries out the visual embodiment through the form of pressure value, help discovering the jam condition in the tributary pipeline 3 early, pay attention to and intervene to the tributary pipeline 3 of jam in advance, set gradually two at least valves 2 on tributary pipeline 3, when the jam condition influences production safety, can close valve 2, carry out on-line isolation to tributary pipeline 3, realize the off-line mediation to the tributary pipeline 3 of jam, do not influence the operating condition of other tributary pipelines 3 beyond this tributary pipeline 3, can realize not shutting down the mediation to block up tributary pipeline 3, can effectively avoid the incident that causes because of blocking up tributary pipeline 3 again.
In detail, the conduit between the two valves 2 is a hose 4. In this embodiment, the branch pipeline 3 between the two valves 2 is a stainless steel braided hose 4, the stainless steel braided hose 4 has strong corrosion resistance, and the hose body of the hose 4 is a thin-wall stainless steel pipe which is hydraulically formed, so that the hose has strong flexibility, stretchability, bending and shock resistance. In the process of disassembling the blocked branch pipeline 3, the branch pipeline 3 can be shifted, and the blocked branch pipeline 3 is convenient to disassemble. In other embodiments, the hose 4 may be a plastic hose 4, and the type of the hose 4 may be selected according to practical situations.
In the embodiment, the valve 2 is a ball valve, and the ball valve has the advantages of small friction moment of a valve rod, stable and flexible long-term operation of the valve rod, small fluid resistance, good sealing performance and the like. In other embodiments, the valve 2 may be a stop valve or a butterfly valve, and the selection of the valve 2 is adjusted according to the actual situation.
In detail, the pressure gauge is connected with a terminal 5 for prompting, in this embodiment, the pressure gauge is a remote pressure switch 7, the remote pressure switch 7 is connected with the terminal 5 for prompting, the terminal 5 is a display, the pressure gauge is the remote pressure switch 7, when the pressure gauge detects that the pressure value deviates from the normal negative pressure value, the blockage monitoring device of the high-temperature area pipeline can prompt a worker through the display, focus on the tributary pipeline 3, and safety accidents occur after the tributary pipeline 3 is prevented from being blocked. In other embodiments, the terminal 5 may further include a device for emitting a warning tone or an indicator light, and the selection of the terminal 5 may be adjusted according to the actual situation.
The invention also provides a method for monitoring and dredging the pipeline blockage, which comprises the following steps:
providing a blockage monitoring device for a high temperature area conduit as defined in any one of the above;
step S110: and determining the blocking state in the pipeline through the pressure value displayed by the pressure instrument.
In this embodiment, the pipeline is the tributary pipeline 3, and the pressure is presented in a numerical mode by setting a pressure meter, so that workers can intuitively know the blocking condition in the tributary pipeline 3 through the pressure value.
In an exemplary embodiment, step S110 determines a blocking status in the pipe by the pressure value displayed by the pressure gauge, including step S1101.
Step S1101: if the pressure value displayed by the pressure meter is smaller than 0, at least part of the pipeline is not blocked; if the pressure value displayed by the pressure gauge is greater than or equal to 0, the pipeline is blocked.
In an exemplary embodiment, if the pressure value displayed by the pressure gauge is less than 0 in step S1101, the pipe is at least partially unblocked, including step S1102.
Step S1102: if the pressure displayed by the pressure meter is a normal negative pressure value, the pipeline is not blocked, and monitoring is continued; if the pressure displayed by the pressure gauge is larger than the normal negative pressure value and smaller than 0, the pipeline part is not blocked, and important attention is paid.
Step S120: if the blocking state is blocking, the valve 2 is closed, and the pipeline is isolated and disassembled.
In this embodiment, after the pipeline is blocked, the valves 2 at two ends of the tributary pipeline 3 are closed, so that the tributary pipeline 3 can be isolated, and the blocked pipeline is dredged under the working condition that other tributary pipelines 3 are not affected, so that the time and economic losses caused by the fact that the rest of the tributary pipelines 3 are required to be closed when the tributary pipeline 3 is blocked and dredged are reduced.
Step S130: and (5) dredging the pipeline by using compressed air or nitrogen and then reinstalling the pipeline.
In this embodiment, compressed air or nitrogen is used for dredging, in other embodiments, other ways of dredging the branch pipeline 3 may be used, and the way of dredging the branch pipeline 3 may be adjusted according to practical situations.
Step S140: and opening the valve 2, and determining the blocking state of the pipeline through the pressure value displayed by the pressure meter.
In this embodiment, the pressure gauge can present the pressure value in the tributary pipe 3 numerically, visually prompting the staff numerically whether the pipe is blocked. The two ends of the hose 4 are respectively in threaded connection with the valve 2, in other embodiments, the hose 4 can also be connected with the valve 2 in a manner of a buckle or the like, and the connection manner of the valve 2 and the hose 4 can be adjusted according to actual conditions so as to achieve the purpose of convenient disassembly.
In an exemplary embodiment, step S140 determines a blocking state of the pipe by the pressure value displayed by the pressure gauge, including:
s1401: if the pressure displayed by the pressure gauge is a normal negative pressure value, the pipeline is dredged; if the pressure displayed by the pressure gauge is not the normal negative pressure value and is smaller than 0, the pipeline is at least partially dredged; if the pressure displayed by the pressure meter is more than or equal to 0, the pipeline is not dredged.
In this embodiment, at least part of the dredging has not reached the ideal state of dredging the branch pipe 3, and the dredging process needs to be performed again, and in other embodiments, it may be determined whether the dredging is still required according to the actual situation. In this embodiment, the normal negative pressure value is-3 kpa, which is an empirical value determined by field experience accumulation, and in other embodiments, the normal negative pressure value may be another value, which may be adjusted according to the actual situation.
In this embodiment, the pressure gauge comprises a remote pressure switch 7. The pipeline is provided with a reading type pressure meter 6 and a remote pressure switch 7, and the reading type pressure meter 6 enables a worker to know the current pipeline condition through the pressure value displayed on the reading type pressure meter 6 in time during inspection. The remote pressure switch 7 can automatically collect pressure information and then feed back the pressure information in real time, and when the remote pressure switch 7 monitors that the pressure value is a normal negative pressure value, the monitoring is continued; when the remote pressure switch 7 monitors that the pressure value is not the normal negative pressure value, warning information is sent out. In this embodiment, the remote pressure switch 7 sends out prompt information through the display, and in other embodiments, the remote pressure switch 7 may also send out prompt information through sound or light, and the sending mode of the prompt information may be adjusted according to the actual situation.
In summary, through setting up the manometer on the pipeline, the form of passing through the pressure value with the jam condition in the pipeline carries out the visual embodiment, help discovering the jam condition in the pipeline early, pay attention to and intervene to the jam pipeline in advance, set gradually two at least valves 2 on the pipeline, when the jam condition influences production safety, can close valve 2, carry out on-line isolation to the pipeline, realize the off-line mediation to the jam pipeline, and do not influence the operating condition of other pipelines beyond this pipeline, can realize not shutting down the mediation jam pipeline, can effectively avoid the incident that causes because of the jam pipeline again.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A blockage monitoring device for a high temperature area conduit, comprising:
the valve is used for opening or closing the pipeline, and at least two valves are sequentially arranged on the pipeline;
and the pressure gauge is arranged on the pipeline between the two valves.
2. The blockage monitoring device for a high temperature area conduit of claim 1, wherein: the pipeline between the two valves is a hose.
3. The blockage monitoring device for a high temperature area conduit of claim 1, wherein: the valve is a ball valve.
4. The blockage monitoring device for a high temperature area conduit of claim 1, wherein: the pressure gauge is connected with a terminal for prompting.
5. The method for monitoring and dredging the pipeline blockage in the high-temperature area is characterized by comprising the following steps of:
providing a blockage monitoring apparatus for a high temperature area conduit as claimed in any one of claims 1 to 4;
determining a blocking state in the pipeline through the pressure value displayed by the pressure instrument;
if the blocking state is blocking, closing the valve, isolating and disassembling the pipeline;
dredging the pipeline by using compressed air or nitrogen, and then reinstalling;
and opening the valve, and determining the blocking state of the pipeline through the pressure value displayed by the pressure instrument.
6. The method for monitoring and unblocking a pipe according to claim 5, wherein determining the unblocking state in the pipe by a pressure value displayed by the pressure gauge comprises:
if the pressure value displayed by the pressure gauge is smaller than 0, the pipeline is at least partially unblocked;
and if the pressure value displayed by the pressure gauge is greater than or equal to 0, the pipeline is blocked.
7. The method of claim 6, wherein if the pressure gauge indicates a pressure value less than 0, the pipe is at least partially unblocked, comprising:
if the pressure displayed by the pressure gauge is a normal negative pressure value, the pipeline is not blocked, and monitoring is continued;
if the pressure displayed by the pressure gauge is greater than the normal negative pressure value and less than 0, the pipeline is not blocked, and important attention is paid.
8. The method for monitoring and unblocking a pipe according to claim 5, wherein determining the unblocking state of the pipe by a pressure value displayed by the pressure gauge comprises:
if the pressure gauge shows that the pressure is a normal negative pressure value, the pipeline is dredged;
if the pressure displayed by the pressure gauge is not a normal negative pressure value and is smaller than 0, the pipeline is at least partially dredged;
if the pressure displayed by the pressure gauge is greater than or equal to 0, the pipeline is not dredged.
9. The method for detecting and unblocking a pipe according to claim 7, wherein: the normal negative pressure value is-3 kilopascals.
10. The method for detecting and dredging a pipeline blockage according to claim 5, wherein the method comprises the following steps: the pressure gauge comprises a remote pressure switch;
when the remote pressure switch monitors that the pressure value is a normal negative pressure value, continuing to monitor;
and when the remote pressure switch monitors that the pressure value is not the normal negative pressure value, a prompt message is sent out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310499462.1A CN116538440A (en) | 2023-05-04 | 2023-05-04 | Device and method for monitoring blockage of pipeline in high-temperature area and dredging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310499462.1A CN116538440A (en) | 2023-05-04 | 2023-05-04 | Device and method for monitoring blockage of pipeline in high-temperature area and dredging method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116538440A true CN116538440A (en) | 2023-08-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310499462.1A Pending CN116538440A (en) | 2023-05-04 | 2023-05-04 | Device and method for monitoring blockage of pipeline in high-temperature area and dredging method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116538440A (en) |
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2023
- 2023-05-04 CN CN202310499462.1A patent/CN116538440A/en active Pending
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