CN108105524A - Air heave type plugging pipelines instrument with pressure relief - Google Patents
Air heave type plugging pipelines instrument with pressure relief Download PDFInfo
- Publication number
- CN108105524A CN108105524A CN201810118856.7A CN201810118856A CN108105524A CN 108105524 A CN108105524 A CN 108105524A CN 201810118856 A CN201810118856 A CN 201810118856A CN 108105524 A CN108105524 A CN 108105524A
- Authority
- CN
- China
- Prior art keywords
- thread spindle
- pressure relief
- plug
- pipe
- connecting sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/164—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing fluid being introduced in the pipe
-
- 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
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
-
- 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
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/12—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ
- F16L55/128—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose
- F16L55/132—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose the closure device being a plug fixed by radially deforming the packing
- F16L55/134—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose the closure device being a plug fixed by radially deforming the packing by means of an inflatable packing
-
- 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
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/1612—Devices for covering leaks in pipes or hoses, e.g. hose-menders by means of a plug
Abstract
The invention discloses a kind of air heave type plugging pipelines instruments with pressure relief, including being radially equipped with screw thread axis and the plug, hollow sleeve, Pipe couplings and the pressure relief that are sequentially arranged on thread spindle, the thread spindle is both ends open and the screwed pipe of inner hollow.Designed thread spindle is both ends open and the screwed pipe of inner hollow, one end installed plug of screw thread, its other end install the band pressure relief, when in use, on the one hand plug with airbag structure has blocked broken pipe, and when the pressure that the flow media (such as water) in pipeline generates plug reaches default safety value, the automatically opening of relief valve, flow media discharge line 13 is outer until external and internal pressure value reaches balance is realized by pressure relief, ensure that the safety of blocking pipe significantly；And pass through the Pipe couplings being mainly made of positioning panel and Duo Gen connecting rods, realize the secondary plugging to pipeline, the reliability of closure greatly improves.
Description
Technical field
The present invention relates to a kind of plugging pipelines devices, and in particular to a kind of air heave type plugging pipelines work with pressure relief
Tool.
Background technology
Needs and the construction in city that China's pipe technology is lived with people are constantly expanded and application.Almost each row is each
Industry can be applied to pipeline, such as the water supply pipe of water service system and waste water conveyance conduit, natural gas supply system
Natural gas transportation pipeline, fresh water delivery pipe, fuel supply pipe and Boiler Steam pipe on ship etc..These pipelines are using
In, it is hit by external force, the aging of pipeline itself or the corrosion of transported medium etc. influence, pipeline fracture, pipe often occurs
There is the failure of the pumped (conveying) mediums such as the water, natural gas, fuel oil that convey leakage, not only creates great peace in the situation of road breakage
Full hidden danger can also cause very big property loss.It therefore, will be disconnected generally by sprue for pipe leakage or fracture defect
Split or the pipeline that leaks be sealed leak stopping after replace broken pipe in real time.
At present, traditional leak stopping mode mainly blocks damaged nozzle using cork and broken rag, traditional leak stopping
Method is complicated for operation, blocking time is long, needs substantial amounts of manpower；In addition, conventional pipelines capping tools is when in use, can directly by
Pipeline internal medium is enclosed in pipeline, since pipeline internal medium build pressure gradually rises, when the pressure build-up in pipeline to one
It can cause the pipeline both sides force unbalance of closure when determining degree, when capping tools is washed open by the medium in pipeline, it will give
Pipeline maintenance and replacement bring very big danger, particularly when pipeline medium is flammable explosive Jie such as natural gas, oil
During matter, it will bring huge harmfulness.
For above-mentioned technical barrier, occur in the prior art it is various it is improved after plugging pipelines instrument, example
As Authorization Notice No. be 203099206U Chinese utility model patent disclose a kind of duct closing type device, include sphere with
Relief tube has relief hole in sphere, and the inner end of relief tube is fixed in relief hole, and valve is installed on relief tube.
The plugging device of this kind of structure in sphere by setting relief hole and under the cooperation of relief tube, will quickly can be situated between in pipeline
Matter emits, and can effectively improve the security of plugging pipelines.But there are still following defects：1) it is used for the sphere of blocking pipe
It can not accomplish seamless closure with inner-walls of duct, plugging effect still needs to improve；2) relief tube as pressure release effect is separated with sphere
Set, if when the interconnection of relief tube and sphere loosens, it will effect when losing closure to pipeline pressure release, pressure release it is steady
It is qualitative low；3) sphere is directly blocked in inner-walls of duct, sphere and pipeline without corresponding connection/fixing device, pipe plugging
Security has much room for improvement with stability.
The content of the invention
For above-mentioned deficiency, the technical problems to be solved by the invention be to provide it is a kind of it is simple in structure, plugging operations are fast
The air heave type plugging pipelines instrument with pressure relief that is prompt and integrating closure and pressure release.
In order to achieve the above objectives, the invention is realized by the following technical scheme：
Air heave type plugging pipelines instrument with pressure relief, including being radially equipped with screw thread axis and being sequentially arranged at spiral shell
Plug, hollow sleeve, Pipe couplings and pressure relief on line axis, the thread spindle are both ends open and inner hollow
Screwed pipe, wherein
Include gas tube, inflation ball valve, n air bag and n+1 circular clamping plate for the plug of blocking pipe, it is described
Circular clamping plate is sequentially coaxially mounted on thread spindle and is installed between the adjacent circular clamping plate of each two there are one the air bag,
The air bag is coaxially mounted to circular clamping plate on thread spindle, and one end of the gas tube is connected with inflating ball valve, its other end
It is connected respectively with each air bag after penetrating each circular clamping plate successively, wherein n is >=1 integer；
The hollow sleeve is penetrated in thread spindle and one end of hollow sleeve is fixed on plug, its other end is equipped with and is used for
Fixed plug screws part, and the part that screws is threaded on thread spindle, and one end of the Pipe couplings can freely connect
It is connected on pipeline, its other end is threadedly coupled with thread spindle；
For the pressure relief for suitably discharging the medium in pipeline, including relief valve, one end of the relief valve
It is connected by flange with thread spindle, its other end is connected with communicating pipe.
In said program, to realize Pipe couplings that capping tools and pipeline connect, it may include fixed
Plane plate and the connecting rod of at least 2, the positioning panel is by fastener slidable connection on thread spindle and positioning panel
Cross-sectional area be more than the cross-sectional area of plug, one end of the connecting rod is hinged on the side wall of positioning panel, its other end is set
There is the grab to connecting pipe.
In said program, further, the part that screws includes the first connecting sleeve and two rotating handleses, the first connection
Casing, which penetrates in thread spindle and is respectively equipped with one at the both ends of the first connecting sleeve, tightens nut, described to tighten nut and thread spindle
It is threadedly coupled, two rotating handleses are respectively symmetrically located at the both sides of thread spindle and are fixed in the first connecting sleeve.
In said program, used fastener includes the second connecting sleeve, the second connecting sleeve penetrate in thread spindle and
The positioning panel is vertically installed in the second connecting sleeve, being respectively equipped with one at the both ends of the second connecting sleeve tightens spiral shell
Mother, the nut of tightening are threadedly coupled with thread spindle.
It, can be in positioning panel and second in order to enhance the stability of Pipe couplings and bonding strength in said program
3 support plates it have been at least connected between connecting sleeve, one end of each support plate is fixed in positioning panel, its other end is fixed on
In second connecting sleeve.
In said program, in order to realize the intelligent control of relief valve, the pressure relief further includes pressure sensor, input
Button and controller, the pressure sensor are mounted in thread spindle and are connected with the input terminal of controller, the input button
It is connected with the input terminal of controller, the control terminal connection of the output terminal of the controller and relief valve and the I/O interfaces of controller
Remote monitoring host computer is connected with by wireless communication module.
Beneficial effects of the present invention are：
1) plug of the present invention includes the circular clamping plate of n air bag and n+1, by gas tube with inflate ball valve to
Inflation in each air bag, in blocking pipe under the squeezing action of front and rear circular clamping plate, air bag is deformed, mutually extends around
Seamless applying each circular clamping plate and inner-walls of duct, form the airtight closure chamber of multiple tracks, have it is simple in structure, easy to operate,
Plugging effect outstanding feature.
2) by mainly by positioning panel and 2 or more and being evenly distributed on the pipe that the connecting rod of positioning panel side forms
Road bindiny mechanism, the ring flange when in use, after plug is fixed again being fixed on the grab in connecting rod on pipeline, finally leads to
It crosses fastener positioning panel is fixed on thread spindle, be determined on thread spindle being mounted on by the connection of ring flange and connecting rod
Plane plate plays tensioning function, realizes the secondary plugging of pipeline, and the reliability of closure greatly improves.
3) thread spindle designed by is both ends open and the screwed pipe of inner hollow, one end installed plug of thread spindle, its
The other end installs the band pressure relief, and when in use, on the one hand plug has blocked broken pipe, when the flow media in pipeline
When the pressure that (such as water) generates plug reaches default safety value, relief valve automatically opens, by flow media discharge line
Outside until external and internal pressure value reaches balance, the safety of blocking pipe ensure that significantly.
Description of the drawings
Fig. 1 is a kind of side structure schematic view when this air heave type plugging pipelines instrument with pressure relief uses.
Fig. 2 is the A-A side structure schematic views of positioning panel in Fig. 1.
Fig. 3 is the structure diagram of Pipe couplings.
Fig. 4 is the structure diagram of plug.
Figure label is：1st, thread spindle, 2, positioning panel, 3, plug, 3-1, circular clamping plate, 3-2, air bag, 4, hollow sleeve
Pipe, 5, rotating handles, the 6, first connecting sleeve, 7, tighten nut, the 8, second connecting sleeve, 9, connecting rod, 10, fixing nut,
11st, support plate, 12, ring flange, 13, pipeline, 14, relief valve, 15, flange, 16, communicating pipe, 17, inflation ball valve, 18, inflation
Pipe.
Specific embodiment
As shown in Figure 1, the air heave type plugging pipelines instrument with pressure relief, including being radially equipped with 1 He of screw thread axis
Plug 3, hollow sleeve 4, Pipe couplings and the pressure relief being sequentially arranged on thread spindle 1.The thread spindle 1 is both ends
The screwed pipe of opening and inner hollow, screwed pipe is specifically threaded steel pipe.
As shown in figure 4, used plug 3 includes gas tube 18, inflation ball valve 17, n air bag 3-2 and n+1 circle
Clamping plate 3-1, wherein n are >=1 integer.N=2 in the present embodiment, i.e. 2 air bag 3-2,3 circular clamping plate 3-1, each circular folder
The center of plate 3-1 is equipped with the through hole penetrated for thread spindle 1.The circle clamping plate 3-1 be sequentially coaxially mounted on thread spindle 1 and
There are one the air bag 3-2 for installation between the adjacent circular clamping plate 3-1 of each two.The air bag 3-2 and circular clamping plate 3-1 are same
Axis is mounted on thread spindle 1, and one end of the gas tube 18 is connected with inflating ball valve 17, its other end sequentially passes through each circular folder
It is connected successively with each air bag 3-2 after plate 3-1.In the present embodiment, the diameter of each circle clamping plate 3-1 is consistent, and ratio is waited to seal
The stifled small 0.5-1.5mm of 13 internal diameter of pipeline.Used air bag 3-2 forms material to have malleable soft rubber air bag 3-
2。
The hollow sleeve 4 penetrates in thread spindle 1 and one end of hollow sleeve 4 is fixed on plug 3, its other end is equipped with
For the part that screws of fixed plug 3, the part that screws is threaded on thread spindle 1.The plug 3 opposite with hollow pipeline 13 is another
One side is equipped with fixing nut 10, screws part to coordinate plug 3 is fixed on thread spindle 1.The part that screws includes the first company
Female connector pipe 6 and two rotating handleses 5, the first connecting sleeve 6 are penetrated in thread spindle 1 and respectively pacified at the both ends of the first connecting sleeve 6
Nut 7 is tightened equipped with one, the nut 7 of tightening is threadedly coupled with thread spindle 1, and two rotating handleses 5 are respectively symmetrically located at screw thread
The both sides of axis 1 are simultaneously fixed in the first connecting sleeve 6.
One end of the Pipe couplings can be freely connected on pipeline 13, its other end is threadedly coupled with thread spindle 1.
As shown in Figure 2 and Figure 3, the Pipe couplings include positioning panel 2 and the connecting rod 9 of at least 2.The positioning panel 2 is logical
Fastener slidable connection is crossed on thread spindle 1 and the cross-sectional area of positioning panel 2 is more than the cross-sectional area of plug 3.Positioning surface
Plate 2 is circular solid steel plate.One end of the connecting rod 9 is hinged on the side wall of positioning panel 2, its other end is equipped with to even
The grab in take over road 13.3 support plates 11 have been at least connected between 2 and second connecting sleeve 8 of positioning panel.The present embodiment
In, the quantity of the connecting rod 9 is 4 and is installed centered on thread spindle 1 in cross structure.One end of each support plate 11 is consolidated
It is scheduled in positioning panel 2, its other end is fixed in the second connecting sleeve 8.
The fastener includes the second connecting sleeve 8, and the second connecting sleeve 8 is penetrated in thread spindle 1 and in the second connector sleeve
The positioning panel 2 is vertically installed on pipe 8, one is respectively equipped at the both ends of the second connecting sleeve 8 and tightens nut 7, it is described to twist
Tight nut 7 is threadedly coupled with thread spindle 1.
The pressure relief includes relief valve, one end of the relief valve is connected by flange 15 with thread spindle 1, its separately
One end is connected with communicating pipe 16.I.e. pressure relief is installed in together with plug 3 on thread spindle 1, and the relief valve is specially to cut
Only valve.Intelligence to realize control valve opens and closes and sets clean boot value, institute for the pumped (conveying) medium in different pipelines 13
State pressure relief and further include controller, input button and pressure sensor, pressure sensor be mounted in thread spindle 1 and with control
The input terminal connection of device, input button are connected with controller, the control terminal connection and control of the output terminal and relief valve of controller
The I/O interfaces of device are connected with a remote monitoring host computer by wireless communication module.
As shown in Figure 1, the present invention is at work：
1) plug 3 is stretched into pipeline 13, while is inflated by inflating ball valve 17 and gas tube 18 into air bag 3-2；
2) and then promote after hollow sleeve 4 makes plug 3 be moved to suitable position, rotate rotating handles 5, tighten nut 7 and exist
Screw thread rotation on thread spindle 1 promotes hollow sleeve 4 to squeeze each circular clamping plate 3-1 on plug 3 successively forward, passes through each circle
The stress successively of clevis plate 3-1 squeezes forward the air bag 3-2 after inflation, is subject under the squeezing action of front and rear circular clamping plate 3-1,
Each air bag 3-2 deforms and extends around, fits closely the inner space of each circle clamping plate 3-1 and pipeline 13, is formed
2 airtight closure chambers, finally tighten and tighten nut 7 on rotating handles 5；
3) on the ring flange 12 for being fixed with the grab hook in connecting rod 9 on pipeline 13, tighten in the second connecting sleeve 8
Nut 7 of tightening can stationary positioned panel 2, you can complete plugging operations.And process is blocked to pipeline 13 in plug 3,
When the pressure that the flow media (such as water) in pipeline 13 generates plug 3 reaches default safety value, relief valve is beaten automatically
It opens, flow media discharge line 13 is outer until being automatically closed when inside and outside pressure value reaches balance.
It these are only and illustrate embodiments of the present invention, be not intended to limit the invention, for those skilled in the art
For, within the spirit and principles of the invention, any modifications, equivalent replacements and improvements are made should be included in this hair
Within bright protection domain.
Claims (6)
1. the air heave type plugging pipelines instrument with pressure relief, it is characterised in that：Including radially be equipped with screw thread axis (1) and
Plug (3), hollow sleeve (4), Pipe couplings and the pressure relief being sequentially arranged on thread spindle (1), the thread spindle
(1) it is both ends open and the screwed pipe of inner hollow,
The plug (3) includes gas tube (18), inflation ball valve (17), n air bag (3-2) and n+1 circular clamping plate (3-1),
The circle clamping plate (3-1) is sequentially coaxially mounted on thread spindle (1) and pacifies between the adjacent circular clamping plate (3-1) of each two
There are one the air bag (3-2), the air bag (3-2) is coaxially mounted to circular clamping plate (3-1) on thread spindle (1) dress, described
One end of gas tube (18) be connected with inflation ball valve (17), its other end penetrate successively after each circle clamping plate (3-1) respectively with respectively
Air bag (3-2) connects, and wherein n is >=1 integer；
The hollow sleeve (4) is penetrated in thread spindle (1) and one end of hollow sleeve (4) is fixed on plug (3), its other end
Equipped with the part that screws for fixed plug (3), the part that screws is threaded on thread spindle (1), the Pipe couplings
One end can freely be connected on pipeline (13), its other end is threadedly coupled with thread spindle (1)；
The pressure relief includes relief valve, one end of the relief valve is connected by flange (15) with thread spindle (1), its separately
One end is connected with communicating pipe (16).
2. the air heave type plugging pipelines instrument according to claim 1 with pressure relief, it is characterised in that：The pipeline connects
Connection mechanism includes positioning panel (2) and the connecting rod of at least 2 (9), and the positioning panel (2) passes through fastener slidable connection
On thread spindle (1) and the cross-sectional area of positioning panel (2) is more than the cross-sectional area of plug (3), one end of the connecting rod (9)
It is hinged on the side walls of positioning panel (2), its other end is equipped with grab to connecting pipe (13).
3. the air heave type plugging pipelines instrument according to claim 1 or 2 with pressure relief, it is characterised in that：The rotation
Tight part includes the first connecting sleeve (6) and two rotating handleses (5), and it is interior and that the first connecting sleeve (6) penetrates thread spindle (1)
The both ends of one connecting sleeve (6) are respectively equipped with one and tighten nut (7), and the nut (7) of tightening is threadedly coupled with thread spindle (1),
Two rotating handleses (5) are respectively symmetrically located at the both sides of thread spindle (1) and are fixed in the first connecting sleeve (6).
4. the air heave type plugging pipelines instrument according to claim 2 with pressure relief, it is characterised in that：The fastener
Including the second connecting sleeve (8), the second connecting sleeve (8) is penetrated in thread spindle (1) and vertically pacified in the second connecting sleeve (8)
Equipped with the positioning panel (2), one is respectively equipped at the both ends of the second connecting sleeve (8) and tightens nut (7), it is described to tighten nut
(7) it is threadedly coupled with thread spindle (1).
5. the air heave type plugging pipelines instrument according to claim 2 with pressure relief, it is characterised in that：In positioning panel
(2) 3 support plates (11) have been at least connected between the second connecting sleeve (8), one end of each support plate (11) is fixed on positioning
On panel (2), its other end is fixed in the second connecting sleeve (8).
6. the air heave type plugging pipelines instrument according to claim 1 with pressure relief, it is characterised in that：The pressure release knot
Structure further includes pressure sensor, input button and controller, and the pressure sensor is mounted in thread spindle (1) and and controller
Input terminal connection, it is described input button and controller input terminal connect, the control of the output terminal and relief valve of the controller
The I/O interfaces of end connection processed and controller are connected with remote monitoring host computer by wireless communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810118856.7A CN108105524A (en) | 2018-02-06 | 2018-02-06 | Air heave type plugging pipelines instrument with pressure relief |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810118856.7A CN108105524A (en) | 2018-02-06 | 2018-02-06 | Air heave type plugging pipelines instrument with pressure relief |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108105524A true CN108105524A (en) | 2018-06-01 |
Family
ID=62221997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810118856.7A Pending CN108105524A (en) | 2018-02-06 | 2018-02-06 | Air heave type plugging pipelines instrument with pressure relief |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108105524A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736817A (en) * | 2018-11-28 | 2019-05-10 | 安徽铜都流体科技股份有限公司 | A kind of closure control technology based on low frequency electromagnetic signals communication and ball sealer intelligent positioning |
| CN110375144A (en) * | 2019-08-31 | 2019-10-25 | 日照钢铁控股集团有限公司 | A kind of airbag apparatus of fast and effective cutting isolation pipeline internally-powered medium |
| CN112145860A (en) * | 2020-09-22 | 2020-12-29 | 河北润达石化工程建设有限公司 | Natural gas pipeline overhauling and plugging device and using method |
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| CN107131387A (en) * | 2017-05-09 | 2017-09-05 | 中北大学 | Air bag and guiding device are blocked in a kind of pipeline based on self-locking |
| CN207935622U (en) * | 2018-02-06 | 2018-10-02 | 钦州学院 | Air heave type plugging pipelines tool with pressure relief |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736817A (en) * | 2018-11-28 | 2019-05-10 | 安徽铜都流体科技股份有限公司 | A kind of closure control technology based on low frequency electromagnetic signals communication and ball sealer intelligent positioning |
| CN109736817B (en) * | 2018-11-28 | 2020-09-01 | 安徽铜都流体科技股份有限公司 | Plugging control method based on low-frequency electromagnetic signal communication and intelligent plugging ball positioning |
| CN110375144A (en) * | 2019-08-31 | 2019-10-25 | 日照钢铁控股集团有限公司 | A kind of airbag apparatus of fast and effective cutting isolation pipeline internally-powered medium |
| CN112145860A (en) * | 2020-09-22 | 2020-12-29 | 河北润达石化工程建设有限公司 | Natural gas pipeline overhauling and plugging device and using method |
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