CN106523845A - Pipeline plugging device - Google Patents
Pipeline plugging device Download PDFInfo
- Publication number
- CN106523845A CN106523845A CN201611161223.1A CN201611161223A CN106523845A CN 106523845 A CN106523845 A CN 106523845A CN 201611161223 A CN201611161223 A CN 201611161223A CN 106523845 A CN106523845 A CN 106523845A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- arc
- plugging
- pipeline plug
- expansion
- 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.)
- Granted
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
- F16L55/10—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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention relates to a pipeline plugging device mainly used for water plugging of municipal drainage pipeline reconstruction, first-aid repair, dredging and the like. The pipeline plugging device comprises a control mechanism and an expansive pipeline plugging head; the expansive pipeline plugging head comprises an elastic plugging cap and an expansion ring mounted in the elastic plugging cap; and the expansion ring is driven by an expansion and contraction mechanism to realize radial expansion and contraction deformation. According to the pipeline plugging device, the control mechanism drives the expansion ring to realize expansion and contraction deformation, so that the elastic plugging cap is plugged in a pipeline close to a pipe orifice. The pipeline plugging device is relatively high in universality, capable of adapting to plugging operation for pipelines with different pipe diameters, convenient to use, large in plugging force, reliable in plugging and relatively high in market and use value.
Description
Technical field
The present invention relates to a kind of pipeline plug, is mainly used in municipal drainage pipeline transformation, repairing and water blockoff thin etc. clearly.
Background technology
In municipal works, especially in the construction of sewage conduct, it is often necessary to which sewage conduct is carried out the envelope of local
It is stifled, and the water in sewage conduct is extracted out, operation in sewage conduct is entered with sharp workmen.Traditional soil pipe method for blocking
It is using closure air bag water blockoff.
The operation principle of closure air bag water blockoff is exactly the pipeline plugging air bag made using top-quality rubber, by inflation method
Expand which, when the gas pressure in water blockoff air bag reaches regulation to be required, water blockoff air bag fills up whole conduit section, using pipe
Road blocks airbag wall and the frictional force of pipeline generation blocks leak, so as to reach the purpose without infiltration in target pipeline section.But the gas
Capsule has to workmen and goes into the well closure, when in well, water level is higher, because the excessive closure of pressure it is relatively difficult；And exist in well
There is countless casualty accident every year in the toxic gas such as hydrogen chloride, the whole nation.
In order to solve the above problems, a kind of drainage pipeline plug preventing people from going down into well for inspection of present inventor's previous design and
Its using method（The patent No.：201310110722.8）, the drainage pipeline plug preventing people from going down into well for inspection have it is safe and reliable, operation
The characteristics of simplicity, cheap and long service life, well operations under workmen can be effectively prevent because poisonous gas are caused
Casualty accident, with larger market value and use value.Yet with the envelope of the drainage pipeline plug preventing people from going down into well for inspection
Plug is to adopt closing disk, and which is shaped as solid shape, and its versatility is poor, it is impossible to which the mouth of pipe closure for adapting to different tube diameters size is made
Industry.In order to further improve the versatility of pipe plugging equipment, need to design the higher block head of a versatility.
The content of the invention
Based on above-mentioned the deficiencies in the prior art, the present invention provides a kind of pipeline plug, and the pipeline plug has higher
Versatility, can adapt to the closure operation of the pipeline of different tube diameters size, and easy to use, closure power is big, and closure is reliable.
Technical program of the present invention lies in：A kind of pipeline plug, the pipeline plug include operating mechanism and expansion
Formula pipe plugging head, the expansion type pipe plugging head include elastic plugging cap and expansion loop, and the expansion loop is arranged on elasticity
In plugging cap, the expansion loop drives its radial direction swell-shrinking deformation by breathing mechanism.Elastic envelope is made by the swell-shrinking deformation of expansion loop
Blocking cap closure is in the pipeline of the mouth of pipe.
Further, the elastic plugging cap is flat cover body.
Further, the expansion loop includes some arc-shaped seat plates and some arc connection sheets, some arc seat boards
Piece and some arc connection sheet interval settings, and connect into jointly the ring bodies of outer radius variable.
Further, some arc connection sheet packets and some arc-shaped seat plate interval settings, every group of arc connection sheet have two
Piece.
Further, the both sides of the arc connection sheet are respectively arranged with curved channel, the both sides point of the arc-shaped seat plate
Alignment pin is not provided with, the alignment pin is engaged with curved channel.
Further, the alignment pin end is additionally provided with spacing shim and split pin.
Further, the breathing mechanism includes front side board, middle push pedal and the back side panel be arrangeding in parallel successively；The front side
It is connected with some connecting rods between plate and back side panel, and these connecting rods both passes through middle push pedal, positioned at front side board and middle push pedal
Between connecting rod on the outside of be additionally provided with back-moving spring；The circumferential portion of the front side board and middle push pedal is not hinged with some supports
Plate, the outer end of some gripper shoes are corresponded to respectively and are hinged on the arc-shaped seat plate of expansion loop；The middle part of the middle push pedal also sets
Push rod is equipped with, the push rod backs through back side panel.Moved forward and backward by external force driving push rod, transported before and after driving middle push pedal
It is dynamic, so as to realize swelling or reducing for expansion loop.
Further, all portions of the front side board and middle push pedal are provided with hinged seat, the arc-shaped seat plate of the expansion loop
On be correspondingly arranged on hinged seat.
Further, the operating mechanism includes main pipe and is located in the internal screw rod of supervisor, adapter and connecting rod；Institute
State main pipe upper end and be provided with nut seat and screw rod, on the upper end of the screw rod, be provided with activity operations rotating disk, the spiral shell
The lower end of bar is docked with the adapter of connecting rod upper end mid portion,
Further, the lower end of the connecting rod is connected with the push rod of expansion type pipe plugging head, the lower end of the main pipe with
The back side panel of expansion type pipe plugging head is connected.
The beneficial effects of the present invention is as follows：The pipeline plug has higher versatility, can adapt to different pipes
The closure operation of the pipeline of footpath size, and it is easy to use, and closure power is big, and closure is reliable.Additionally, the pipeline plug of the present invention
Also have the characteristics that：
First, it is safe：It is safe and reliable without down-hole operation, and can water level is higher and full packages in the case of blocked, greatly
Improve greatly safety coefficient.Avoid the injury that well operations are caused to workmen because of toxic gas such as hydrogen chloride under workmen
And the danger that the traditional balloon burst of heavy caliber workmen's inlet pipe operation brings.Further, since being manufactured using metal material, knot
Structure good stability, it is safe and reliable.
2nd, it is easy to operate：Flexible operating by one people, plugging effect are good, convenient and swift.Substantially increase work effect
Rate.
3rd, environmentally friendly low-carbon (LC)：Being drawn water without power station or water pump in advance compared with traditional air bag reduces water level and consumes
Petrol and diesel oil and without air compressor machine（Electromotor）The noise and environmental pollution of qi of chong channel ascending adversely and generation, reduces discharge.
4th, it is durable in use：There is no explosion, breakage compared with traditional air bag in machining.
5th, it is cheap：To units up to ten thousand, each bore air bag is accumulative also to want tens thousand of units, import to one thousand of unit of traditional air bag
One more reaches tens of thousands of units, and easily damaged explosion, and service life is short；Made using metal material, drawn materials conveniently, and disposably
Investment is permanent to be used, and greatlys save cost.
Description of the drawings
Fig. 1 is the structural representation of pipeline plug in embodiment.
Fig. 2 is the structural representation of expansion type pipe plugging head in embodiment.
Fig. 3 is the overlooking the structure diagram of the main body mechanism of expansion type pipe plugging head in embodiment.
Fig. 4 is the dimensional structure diagram of the main body mechanism of expansion type pipe plugging head in embodiment.
Label declaration：1- elasticity plugging cap 2- expansion loop 3- breathing mechanism 4- operating mechanism 5- expansion type pipes
Road block head；
2.1- arc-shaped seat plate 2.2- arc connection sheet 2.3- curved channel 2.4- alignment pins；
Push pedal 3.3- back side panels 3.4- hinged seat 3.5- connecting rod 3.6- back-moving springs in the middle of 3.1- front side board 3.2-
3.7- gripper shoe 3.8- push rods；
4.1- main pipe 4.2- screw rod 4.3- adapter 4.4- connecting rod 4.5- nut seat 4.6- activity operations turn
Disk.
Specific embodiment
By describing technology contents of the invention, structural features in detail, realizing purpose and effect, below in conjunction with embodiment
And coordinate accompanying drawing to be explained in detail.
As shown in figure 1, the pipeline plug of the present invention includes operating mechanism 4 and expansion type pipe plugging head 5, the manipulation
Mechanism 4 includes main pipe 4.1 and the screw rod 4.2, adapter 4.3 and the connecting rod 4.4 that are located in main pipe 4.1；The supervisor
4.1 upper end of body is provided with nut seat 4.5 and screw rod 4.2, and activity operations rotating disk is provided with the upper end of the screw rod 4.2
4.6, the lower end of the screw rod 4.2 is docked with the adapter 4.3 of 4.4 upper end mid portion of connecting rod.The connecting rod 4.4
Lower end be connected with the push rod 3.8 of expansion type pipe plugging head, the lower end of the main pipe 4.1 and expansion type pipe plugging head
Back side panel 3.3 be connected.
As shown in Fig. 2 the expansion type pipe plugging head of the present invention includes elastic plugging cap 1 and expansion loop 2.
As shown in Fig. 2 the elastic plugging cap 1 is flat cover body, the more specifically flexible housing of Fructus Cucurbitae moschatae type.
As shown in Figures 2 and 3, the expansion loop 2 is arranged in elastic plugging cap 1, and the expansion loop 2 includes some arcs
Seat board piece 2.1 and some arc connection sheets 2.2, some arc-shaped seat plates 2.1 are set with some arc connection sheets 2.2 interval
Put, and connect into jointly the ring bodies of outer radius variable.
As shown in Figures 2 and 3, in the present embodiment, 2.2 points six groups of 12 arc connection sheets and six arc-shaped seat plates
2.1 interval settings, every group of arc connection sheet 2.2 have two panels.The both sides of the arc connection sheet are respectively arranged with curved channel
2.3, the both sides of the arc-shaped seat plate 2.1 are respectively arranged with alignment pin 2.4, and the alignment pin 2.4 is matched with curved channel 2.3
Close.2.4 end of the alignment pin is additionally provided with spacing shim and split pin, naturally it is also possible to using nut come spacing.
As shown in Figures 2 and 3, the expansion loop 2 drives its radial direction swell-shrinking deformation by breathing mechanism 3.By expansion loop 2
Swell-shrinking deformation makes elastic plugging cap 1 block in the pipeline of the mouth of pipe.
As shown in Figure 2 and Figure 4, the breathing mechanism 3 includes front side board 3.1,3.2 and of middle push pedal be arrangeding in parallel successively
Back side panel 3.3.
As shown in Figure 2 and Figure 4, all portions of the front side board 3.1 and middle push pedal 3.2 are provided with hinged seat 3.4, described swollen
Hinged seat 3.4 is correspondingly arranged on the arc-shaped seat plate 2.1 of tensioner ring 2.
As shown in Figure 2 and Figure 4, three connecting rods 3.5, three connecting rods are connected between the front side board 3.1 and back side panel 3.3
3.5 is evenly distributed in the circumferential direction, and these connecting rods 3.5 both pass through middle push pedal 3.2, push away positioned at front side board 3.1 and centre
Back-moving spring 3.6 is additionally provided with the outside of connecting rod 3.5 between plate 3.2.
As shown in Figure 2 and Figure 4, the circumferential portion of the front side board 3.1 and middle push pedal 3.2 is not hinged with some gripper shoes
3.7, the outer end of some gripper shoes 3.7 is corresponded on the hinged seat 3.4 of the arc-shaped seat plate 2.1 for being hinged on expansion loop 2 respectively.
As shown in Figure 2 and Figure 4, the middle part of the middle push pedal 3.2 is additionally provided with push rod 3.8, and the push rod 3.8 is worn backward
Later side plate 3.3.Advanced by external force driving push rod 3.8 or setback, drive middle push pedal 3.2 to move forward and backward, so as to reality
Existing expansion loop swells or reduces.
Embodiments of the invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included in the scope of patent protection of the present invention.
Claims (10)
1. a kind of pipeline plug, it is characterised in that：The pipeline plug includes operating mechanism and expansion type pipe plugging head,
The expansion type pipe plugging head includes elastic plugging cap and expansion loop, and the expansion loop is arranged in elastic plugging cap, described
Expansion loop drives its radial direction swell-shrinking deformation by breathing mechanism.
2. pipeline plug according to claim 1, it is characterised in that：The elastic plugging cap is flat cover body.
3. pipeline plug according to claim 1, it is characterised in that：The expansion loop include some arc-shaped seat plates and
Some arc connection sheets, some arc-shaped seat plates and some arc connection sheet interval settings, and connect into jointly external diameter can
The ring bodies of change.
4. pipeline plug according to claim 3, it is characterised in that：Some arc connection sheet packets and some arc-shaped seats
Plate interval setting, every group of arc connection sheet have two panels.
5. the pipeline plug according to claim 3 or 4, it is characterised in that：The both sides of the arc connection sheet set respectively
Curved channel is equipped with, the both sides of the arc-shaped seat plate are respectively arranged with alignment pin, and the alignment pin is engaged with curved channel.
6. pipeline plug according to claim 5, it is characterised in that：The alignment pin end is additionally provided with spacing shim
And split pin.
7. pipeline plug according to claim 1, it is characterised in that：The breathing mechanism includes what is be arranged in parallel successively
Front side board, middle push pedal and back side panel；It is connected with some connecting rods between the front side board and back side panel, and these connecting rods is worn
Push pedal in the middle of crossing, is additionally provided with back-moving spring on the outside of the connecting rod between front side board and middle push pedal；The front side board is with
Between the circumferential portion of push pedal be not hinged with some gripper shoes, the outer end of some gripper shoes corresponds to the arc-shaped seat for being hinged on expansion loop respectively
On plate；Push rod is additionally provided with the middle part of the middle push pedal, the push rod backs through back side panel.
8. pipeline plug according to claim 7, it is characterised in that：All portions of the front side board and middle push pedal are arranged
There is hinged seat, on the arc-shaped seat plate of the expansion loop, be correspondingly arranged on hinged seat.
9. pipeline plug according to claim 1, it is characterised in that：The operating mechanism includes main pipe and is located in
The internal screw rod of supervisor, adapter and connecting rod；The main pipe upper end is provided with nut seat and screw rod, the screw rod it is upper
Activity operations rotating disk is provided with termination, the lower end of the screw rod is docked with the adapter of connecting rod upper end mid portion.
10. pipeline plug according to claim 9, it is characterised in that：The lower end of the connecting rod and expansion type pipeline
The push rod of block head is connected, and the lower end of the main pipe is connected with the back side panel of expansion type pipe plugging head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611161223.1A CN106523845B (en) | 2016-12-15 | 2016-12-15 | A kind of pipeline plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611161223.1A CN106523845B (en) | 2016-12-15 | 2016-12-15 | A kind of pipeline plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106523845A true CN106523845A (en) | 2017-03-22 |
| CN106523845B CN106523845B (en) | 2018-06-19 |
Family
ID=58340100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611161223.1A Active CN106523845B (en) | 2016-12-15 | 2016-12-15 | A kind of pipeline plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106523845B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825925A (en) * | 2018-06-01 | 2018-11-16 | 广州加士特密封技术有限公司 | A kind of self-locking plug for seal device |
| CN110425373A (en) * | 2019-08-27 | 2019-11-08 | 天津市艺智汇科技发展有限公司 | A kind of hydraulic push-and-pull water block device and application method suitable for a variety of calibers |
| CN110988122A (en) * | 2019-12-03 | 2020-04-10 | 山东大学 | Sectional type coupling device and method suitable for upward inclined borehole sound wave test |
| CN111810080A (en) * | 2020-07-21 | 2020-10-23 | 山西省煤炭地质物探测绘院 | Seismic well gun plugging device and method for suppressing interference waves |
| CN111980045A (en) * | 2020-08-06 | 2020-11-24 | 广州协安建设工程有限公司 | Foundation pit continuous dewatering construction method for foundation anti-floating |
| WO2020249986A1 (en) | 2019-06-12 | 2020-12-17 | Inetec-Institute For Nuclear Technology Ltd. | A large diameter pipe closing device |
| CN113974710A (en) * | 2021-10-09 | 2022-01-28 | 重庆大清生物有限公司 | Blocking structure for craniotomy |
| RU2779007C1 (en) * | 2019-06-12 | 2022-08-30 | Инитек-Инститьют Фор Ньюклиа Текнолоджи Лтд. | Closing device for large diameter pipes |
| CN115451232A (en) * | 2022-07-27 | 2022-12-09 | 北京燃气昌平有限公司 | Self-adaptive gas pipeline plugging device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2025662B1 (en) * | 2020-05-25 | 2021-12-13 | Dhatec B V | Plug for a pipe and method for closing off a pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998027377A1 (en) * | 1996-12-18 | 1998-06-25 | Nataliya Alexandrovna Nosova | Device for filling perforations |
| CN202674700U (en) * | 2012-06-08 | 2013-01-16 | 沈阳万达石化设备有限公司 | Expansion plugging mechanism of plugging device |
| CN204267973U (en) * | 2014-05-23 | 2015-04-15 | 刘建忠 | The resistance to tamponade of pipeline |
| CN204554223U (en) * | 2015-03-26 | 2015-08-12 | 昆明迈克西门科技有限公司 | Flexible pipe seal arrangement |
| CN206439560U (en) * | 2016-12-15 | 2017-08-25 | 福州市水务管网维护有限公司 | Pipeline plug |
-
2016
- 2016-12-15 CN CN201611161223.1A patent/CN106523845B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998027377A1 (en) * | 1996-12-18 | 1998-06-25 | Nataliya Alexandrovna Nosova | Device for filling perforations |
| CN202674700U (en) * | 2012-06-08 | 2013-01-16 | 沈阳万达石化设备有限公司 | Expansion plugging mechanism of plugging device |
| CN204267973U (en) * | 2014-05-23 | 2015-04-15 | 刘建忠 | The resistance to tamponade of pipeline |
| CN204554223U (en) * | 2015-03-26 | 2015-08-12 | 昆明迈克西门科技有限公司 | Flexible pipe seal arrangement |
| CN206439560U (en) * | 2016-12-15 | 2017-08-25 | 福州市水务管网维护有限公司 | Pipeline plug |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825925A (en) * | 2018-06-01 | 2018-11-16 | 广州加士特密封技术有限公司 | A kind of self-locking plug for seal device |
| WO2020249986A1 (en) | 2019-06-12 | 2020-12-17 | Inetec-Institute For Nuclear Technology Ltd. | A large diameter pipe closing device |
| RU2779007C1 (en) * | 2019-06-12 | 2022-08-30 | Инитек-Инститьют Фор Ньюклиа Текнолоджи Лтд. | Closing device for large diameter pipes |
| CN114008370A (en) * | 2019-06-12 | 2022-02-01 | Inetec学院核工艺学有限公司 | Large-diameter pipe sealing device |
| CN110425373A (en) * | 2019-08-27 | 2019-11-08 | 天津市艺智汇科技发展有限公司 | A kind of hydraulic push-and-pull water block device and application method suitable for a variety of calibers |
| CN110988122B (en) * | 2019-12-03 | 2021-09-03 | 山东大学 | Sectional type coupling device and method suitable for upward inclined borehole sound wave test |
| CN110988122A (en) * | 2019-12-03 | 2020-04-10 | 山东大学 | Sectional type coupling device and method suitable for upward inclined borehole sound wave test |
| CN111810080A (en) * | 2020-07-21 | 2020-10-23 | 山西省煤炭地质物探测绘院 | Seismic well gun plugging device and method for suppressing interference waves |
| CN111810080B (en) * | 2020-07-21 | 2023-03-14 | 山西省煤炭地质物探测绘院 | Seismic well gun plugging device and method for suppressing interference waves |
| CN111980045A (en) * | 2020-08-06 | 2020-11-24 | 广州协安建设工程有限公司 | Foundation pit continuous dewatering construction method for foundation anti-floating |
| CN113974710A (en) * | 2021-10-09 | 2022-01-28 | 重庆大清生物有限公司 | Blocking structure for craniotomy |
| CN113974710B (en) * | 2021-10-09 | 2023-09-22 | 重庆大清生物有限公司 | Plugging structure for craniotomy |
| CN115451232A (en) * | 2022-07-27 | 2022-12-09 | 北京燃气昌平有限公司 | Self-adaptive gas pipeline plugging device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106523845B (en) | 2018-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106523845A (en) | Pipeline plugging device | |
| CN106499908A (en) | A kind of expansion type pipe plugging head and its main body mechanism | |
| CN206439560U (en) | Pipeline plug | |
| CN110206961A (en) | Plugging system in a kind of pipe robot | |
| WO2021237601A1 (en) | Fracturing and conveying ground manifold system | |
| CN206439559U (en) | Expansion type pipe plugging head and its main body mechanism | |
| CN202693219U (en) | Portable gas pipeline air pressing apparatus | |
| WO2019205355A1 (en) | Multi-stage coal seam water injection borehole packing system and water injection borehole packing method | |
| CN203718274U (en) | Multi-pipe-diameter general type gas filling pipe plug | |
| CN113007445B (en) | Municipal works are pipeline leakage prevention device down worn | |
| CN203176631U (en) | Pipeline rapid plugging device | |
| CN211010395U (en) | Pipeline shutoff construction equipment | |
| CN204679211U (en) | Static pressure type manometer verification servicing unit | |
| CN206769866U (en) | A kind of oil exploitation preventer suitable for pipelines diameter | |
| CN220082477U (en) | Pipeline plugging device for pipeline rush repair | |
| CN202972368U (en) | Choke ball used for gas pipeline emergency maintenance | |
| CN221100320U (en) | Pressure testing tool for collecting pipelines | |
| CN110425373A (en) | A kind of hydraulic push-and-pull water block device and application method suitable for a variety of calibers | |
| CN218102528U (en) | PE pipe recovery structure | |
| CN218119079U (en) | Pipeline maintenance plugging device | |
| CN202170799U (en) | Auxiliary column-decreasing device of hydraulic support by means of pressurization | |
| CN215335176U (en) | Pipeline crack repairing device | |
| CN215862028U (en) | Water conservancy pipeline lays pulling equipment | |
| CN204128902U (en) | A kind of clamping of the tubing for multitube high pressure water pressure test machine and drawing mechanism | |
| CN219532392U (en) | Device for testing tightness of dyke-penetrating culvert pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |