CN106424032A - Pipe cleaning device with automatic brake device - Google Patents
Pipe cleaning device with automatic brake device Download PDFInfo
- Publication number
- CN106424032A CN106424032A CN201611017496.9A CN201611017496A CN106424032A CN 106424032 A CN106424032 A CN 106424032A CN 201611017496 A CN201611017496 A CN 201611017496A CN 106424032 A CN106424032 A CN 106424032A
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- China
- Prior art keywords
- cylinder
- wiper
- brake
- hinged
- support
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/049—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a pipe cleaning device with an automatic brake device. The pipe cleaning device is used for pipe cleaning work. The defect that an existing speed adjusting pipe cleaning device is poor in generality in a pipe is overcome. According to the technical scheme, leather bowls are arranged at the two ends of a cylinder, one end of a connecting rod B is hinged to a brake piece, the other end of the connecting rod B is hinged to the cylinder, one end of a connecting rod C is hinged to the brake piece, the other end of the connecting rod C penetrates a groove hole of the cylinder and is hinged to a mandrel, a brake oil cylinder is arranged in the cylinder, a piston rod of the brake oil cylinder is connected with the mandrel, rollers are mounted on input shafts of hydraulic pumps, a supporting spring is arranged between the two hydraulic pumps which are arranged at the rear end of the cylinder, an oil tank is arranged in the cylinder, oil suction openings of the hydraulic pumps are connected to the oil tank, oil outlets of the hydraulic pumps are connected to a throttling valve, an oil returning opening of the throttling valve is connected to the oil tank, and the front end of the throttling valve is connected with the brake oil cylinder. A pipe cleaning device speed controller is free of an electric appliance element, safety and reliability are achieved, and the device has the high generality in the pipe.
Description
Technical field
The present invention relates to a kind of wiper with dead-man's device, for pipeline cleaning operation.
Background technology
Carrying out in pigging and detection process to oil and gas pipes, the general laws and regulations requirement pigging equipment speed of service is 3.5～
5m/s；Pipeline detection equipment is in order to obtain preferably detection data quality it is desirable to the speed of service of equipment is less than 5 m/s；Electricity
Magnetic ultrasonic detection equipment then requires its speed of service to be less than 2 m/s.Wiper by pipeline climb and fall section, bending section, hydrops,
When long-pending sand and fouling section, speed changes greatly, and directly can not meet speed controlling using conventional wiper and require.
Existing oil and gas pipes wiper speed control method is active control mode and passive control mode.
Active control adopts bypass valve control mode, and its technical scheme is：Gather wiper speed or use with mileage wheel
Acceleration transducer obtains wiper speed；Electric-control system is to signal processing；Adjust the opening degree of eduction valve by motor；
Passing through pressure reduction before and after eduction valve aperture regulation wiper again, adjusting wiper motive force, thus controlling the wiper speed of service.
Passive control mode be by adjust the pressure medium of arrival end and the port of export and flow in pigging operation come indirect
Control wiper speed.Because the compressibility of gas, passive control mode often difficult to reach preferable speed controlling effect, clearly
Pipe device easily causes impact because speed is excessive, causes the problems such as wiper and pipe damage.
Patent CN201410219086.7 discloses a kind of automatic speed regulation wiper, and the program adopts half-crossed belt to pass
Move, the easy sideslip of belt and skidding under complex working condition in pipeline, and program speed acquisition wheel passes through spring tension and props up
Strut realize, total arrangement length longer it is difficult to meet wiper pass through tube bends means suitable.
Patent CN201410225525.5 discloses a kind of wiper speed acquisition device, and the program adopts speed acquisition wheel
Drive the mode of hydraulic pump, with extension spring and strut, speed acquisition wheel is pressed on inner-walls of duct.Therefore the program is applied
On wiper, wiper entire length can be relatively long, is unfavorable for that device passes through bend pipe.
Patent CN 201410708220.X discloses a kind of wiper speed control with hydraulic system, and the program will
Wiper speed is converted into the rotation of centroplasm gauge block by hydraulic system, and mass rotates the centrifugal force producing and brake block is produced
Raw extruding force.Program complex structure, feasibility is relatively low.
Patent CN 201610134623.7 discloses a kind of rotary bypass valve speed governing wiper, program speed acquisition
Wheel adopts radial arrangement, easily stuck by branch pipe tee connection position.
Patent CN 201610015859.9 discloses a kind of wiper hydraulic control brake gear, and the program passes through hydraulic system
The collection wiper speed of service, and one control resistance with velocity correlation of bad student.Patent CN 201610013135.0 discloses
A kind of wiper brake gear, the program adopts hydraulic system to gather the wiper speed of service, and rotates generation by mass
Controling power.In above two scheme, brake block continues and pipe friction, and is used in series with conventional wiper device, increased
Complete equipment complexity.
Patent CN 201610013358.7 discloses a kind of bypass valve type speed governing wiper, and program speed acquisition wheel sets
Put in the middle of wiper, the bypass valve that slides axially is arranged on cylinder centre position, layout makes middle choke valve too small；Simultaneously
The speed acquisition wheel of radial arrangement is easily stuck at threeway position.
Current active control mode controlled motor consumes electric energy, and the accumulator electric-quantity that wiper carries is limited, therefore long
It is restricted apart from pipeline cleaning.On the other hand, the bypass valve control program of automatically controlled mode is because it is contemplated that medium, pipeline shape in pipe
The factors such as shape and become complicated.State's internal bypass valve active control mode wiper is still immature, and abroad such wiper is rented
With expensive, domestic oil and gas pipes pigging is still based on passive control mode at present.Therefore, develop applicable working condition wider certainly
Dynamic speed governing wiper is significant and prospect of the application.
Content of the invention
The purpose of the present invention：In order to overcome the shortcoming of existing wiper bypass valve earial drainage control mode, and overcome existing tune
By the shortcoming that property is not strong in fast wiper pipeline, a kind of wiper with dead-man's device of special offer.
For reaching above-mentioned purpose, the present invention adopts the technical scheme that：A kind of wiper with dead-man's device, including
Roller, hydraulic pump, rear end cap, leather cup, brake block, connecting rod B, connecting rod C, cylinder, drive end bearing bracket, heart axle, brake oil cylinder, fuel tank, section
Stream valve it is characterised in that：Barrel front end is installed front end cover back-end and is installed rear end cap, and cylinder two ends arrange leather cup；Brake block is arranged
Between the leather cup on cylinder both sides, connecting rod B one end is hinged to the brake block centre position other end and is hinged on cylinder, connecting rod C mono-
End is hinged to the brake block centre position other end and passes through the grooved hole of cylinder and be hinged on heart axle；Heart axle is arranged in drive end bearing bracket
Between position；Setting brake oil cylinder in cylinder, the piston rod of described brake oil cylinder is connected with heart axle；Hydraulic pump input shaft passes through hydraulic pressure
Pump case is stretched out from both sides, and roller is installed at described hydraulic pump input shaft two ends；Support spring is set between two hydraulic pumps；Hydraulic pressure
Pump is arranged on outside rear end cap, and hydraulic pump is connected on rear end cap or is connected on cylinder；Fuel tank is arranged in cylinder, hydraulic pressure
Pumping hydraulic fluid port is connected to fuel tank, and hydraulic pump oil-out is connected to choke valve, and choke valve oil return opening is connected to fuel tank, choke valve front end
It is connected with brake oil cylinder.
Including connection ring it is characterised in that：Connection ring is arranged on drive end bearing bracket outer end.
Including mounting ring it is characterised in that：Brake oil cylinder is fixed in mounting ring, screw between described mounting ring and cylinder
Fixing.
Described brake oil cylinder includes Braking piston bar, Braking piston and brake cylinder body, and brake cylinder body is fixed in mounting ring
Blending bolt connects, setting Braking piston in brake cylinder body, and Braking piston connects Braking piston bar, and Braking piston bar is connected to the heart
Axle.
Including connecting rod A it is characterised in that：Connecting rod A one end connects hydraulic pump, and the other end is hinged on rear end cap or cylinder
On.
Described brake block is sled shape, and brake block tilts partly near drive end bearing bracket.
Including sleeve it is characterised in that：Sleeve is arranged between drive end bearing bracket and heart axle, and described sleeve generally cylindrical shape is simultaneously
It is fixed to drive end bearing bracket centre position, heart axle can slide in sleeve.
Including support cylinder, connecting rod D and pole cap it is characterised in that：Described support cylinder is arranged on outside rear end cap, supports
Pole cap is installed in the piston rod outer end of oil cylinder, and connecting rod D one end is hinged to the casing of hydraulic pump other end and is hinged on pole cap；Before choke valve
End is drawn pressure and is connected with support cylinder.
Described support cylinder includes supporting cylinder body, supports piston, supports piston rod, supports cylinder body to be fixed to and rear end cap
On, support piston to be arranged in shoring body, support piston to connect and support piston rod, support piston rod outer end that pole cap is installed；Institute
State the pole cap generally cylindrical shape with base, pole cap is buckled in support piston rod end, pole cap both sides setting journal stirrup installing connecting rods
D；The described connecting rod D other end is hinged on casing of hydraulic pump.
Including check valve it is characterised in that：Check valve is arranged on hydraulic pump outlet position.
The invention has the advantages that：（1）Rotary bypass valve speed governing wiper no electric elements of the present invention,
Safe and reliable it is not necessary to pass through accumulators store energy, can be used for long away from pipeline cleaning；（2）Pipe detection can be carried set
Standby, complete pipe detection and the work of pigging；（3）Can apply to gas pipeline and fluid pipeline；（4）Shutter part is arranged
Inside wiper, choke valve has sufficient space, can increase choke valve overall dimensions, reduces blocking risk；（5）Roller sets
Put the rear end in whole device, the link tilt arrangement of roller, such whole device property passed through in pipeline is strong, in branch pipe tee connection
Position, bend pipe position are difficult stuck.
Brief description
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the hydraulic system principle figure of the present invention.
In figure：1. roller；2. hydraulic pump；3. support spring；4. connecting rod A；5. rear end cap；6. leather cup；7. backboard；8. stop
Car piece；9. connecting rod B；10. connecting rod C；11. cylinders；12. front aprons；13. drive end bearing brackets；14. sleeves；15. connection rings；16. heart axles；
17. brake oil cylinders；18. Braking piston bars；19. Braking pistons；20. brake cylinder bodies；21. mounting rings；22. fuel tanks；23. support oil
Cylinder；24. support cylinder bodies；25. support pistons；26. support piston rods；27. pole caps；28. connecting rod D；29. check valves；30. throttlings
Valve.
Specific embodiment
The present invention is not limited by following embodiments, can be determined with technology according to the present invention scheme and practical situation
Specific embodiment.Make following description with reference to Fig. 1,2 couples of present invention.The position relationships such as upper and lower, left and right are that foundation is said
The layout direction of bright book accompanying drawing 1 is determining.
Cylinder 11 front end is installed drive end bearing bracket 13 blending bolt and is connected, and cylinder 11 rear end is installed rear end cap 5 blending bolt and connected.
Cylinder 11 rear end setting backboard 7 is simultaneously fixed using welding manner, and described backboard 7 outside setting leather cup 6 is simultaneously pressed with rear end cap 5
Tightly, bolt connection rear end cap 5 and backboard 7.Drive end bearing bracket 13 is outer to install leather cup 6, bolt connection front fixing with front apron 12
Plate 12 and drive end bearing bracket 13.Connection ring 15 is installed in drive end bearing bracket 13 outer end, and described connection ring 15 is used for mounting hook, catches on institute with hook
State connection ring 15, conveniently wiper is taken out in ball collecting chamber.
Brake block 8 is sled shape, and described brake block 8 tilts partly near drive end bearing bracket 13.Brake block 8 is arranged on 11 liang of cylinder
Between the leather cup 6 on side, connecting rod B9 one end is hinged to the brake block 8 centre position other end and is hinged on cylinder 11, connecting rod C10 one end
It is hinged to the brake block 8 centre position other end to pass through the grooved hole of cylinder 11 and be hinged on heart axle 16.Before heart axle 16 is arranged on
End cap 13 centre position；More optimization, arranges sleeve 14, described sleeve 14 generally cylinder between drive end bearing bracket 13 and heart axle 16
Shape is simultaneously fixed to drive end bearing bracket 13 centre position, and heart axle 16 can slide in sleeve 14.
Setting brake oil cylinder 17 in cylinder 11, the piston rod of described brake oil cylinder 17 is connected with heart axle 16.Brake oil cylinder 17
It is fixed in mounting ring 21, between described mounting ring 21 and cylinder 11, screw is fixed.Described brake oil cylinder 17 includes Braking piston
Bar 18, Braking piston 19 and brake cylinder body 20, brake cylinder body 20 is fixed to blending bolt in mounting ring 21 and connects, and brake cylinder body 20
Interior setting Braking piston 19, Braking piston 19 connects Braking piston bar 18, and Braking piston bar 18 is connected to heart axle 16.
Two hydraulic pumps 2 are positioned opposite, and hydraulic pump 2 input shaft stretches out through hydraulic pump 2 housing from both sides, described hydraulic pump
Roller 1 is installed at 2 input shaft two ends.Support spring 3 is set between two hydraulic pumps 2, and roller 1 is pressed on by described support spring 3
Inner-walls of duct.Connecting rod A4 one end is hinged on hydraulic pump 2 housing, and the other end is hinged on rear end cap 5.
Rear end cap 5 outside centre position setting support cylinder 23, pole cap is installed in the piston rod outer end of described support cylinder 23
27, connecting rod D28 one end is hinged to the hydraulic pump 2 housing other end and is hinged on pole cap 27.Described support cylinder 23 includes shoring
Body 24, support piston 25 and support piston rod 26, support cylinder body 24 to be fixed on rear end cap 5 and with bolts, support and live
Plug 25 is arranged in support cylinder body 24, supports piston 25 to connect and supports piston rod 26, supports piston rod 26 outer end to install pole cap 27.
The described pole cap 27 generally cylindrical shape with base, pole cap 27 is buckled in support piston rod 26 end, and pole cap 27 both sides arrange journal stirrup
And installing connecting rods D28, the described connecting rod D28 other end is hinged on hydraulic pump 2 housing.
Fuel tank 22 is arranged in cylinder 11, and described fuel tank 22 is closed type fuel tank 22.Hydraulic pump 2 inlet port is connected to fuel tank
22, hydraulic pump 2 oil-out is connected to choke valve 30, and choke valve 30 oil return opening is connected to fuel tank 22, choke valve 30 front end and support
Oil cylinder 23 and brake oil cylinder 17 connect.More optimization, hydraulic pump 2 exit position arranges check valve 29.
The operation principle of the present invention is：Roller 1 is pressed on inner-walls of duct by support spring 3, and wiper is in front and back's medium
Pressure reduction runs under promoting in pipeline, and roller 1 drives hydraulic pump 2 to work, and the high-voltage oil liquid of hydraulic pump 2 output is through choke valve 30
Flow back to fuel tank 22, choke valve 30 forefront pressure is delivered to support cylinder 23 and brake oil cylinder 17.Support cylinder 23 passes through connecting rod D28
Strut two hydraulic pumps 2, the contact force between the roller 1 on hydraulic pump 2 both sides and inner-walls of duct increases, reduce slip risk.Clearly
The pipe device speed of service is bigger, and the motive force that support cylinder 23 produces is bigger, and roller 1 is less susceptible to skid.
The thrust that brake oil cylinder 17 produces passes through Braking piston 19 and Braking piston bar 18 is delivered on heart axle 16, heart axle 16
Brake block 8 is made to be pressed on inner-walls of duct by connecting rod B9 and connecting rod C10.Wiper speed of service lifting then choke valve 30 flow
Increase, the choke pressure that choke valve 30 produces increases, the thrust between brake block 8 and pipeline increases, the brake weight of generation increases
Plus.With should the wiper speed of service reduce, the brake weight that brake block 8 produces reduces.So, the wiper speed of service can be more
Steadily.
Claims (10)
1. a kind of wiper with dead-man's device, including roller, hydraulic pump, rear end cap, leather cup, brake block, connecting rod B, connects
Bar C, cylinder, drive end bearing bracket, heart axle, brake oil cylinder, fuel tank, choke valve it is characterised in that：
Barrel front end is installed front end cover back-end and is installed rear end cap, and cylinder two ends arrange leather cup；Brake block is arranged on cylinder both sides
Between leather cup, connecting rod B one end is hinged to the brake block centre position other end and is hinged on cylinder, and connecting rod C one end is hinged to brake
The piece centre position other end passes through the grooved hole of cylinder and is hinged on heart axle；Heart axle is arranged on drive end bearing bracket centre position；Cylinder
Interior setting brake oil cylinder, the piston rod of described brake oil cylinder is connected with heart axle；
Hydraulic pump input shaft stretches out through casing of hydraulic pump from both sides, and roller is installed at described hydraulic pump input shaft two ends；Two liquid
Support spring is set between press pump；Hydraulic pump is arranged on outside rear end cap, and hydraulic pump is connected on rear end cap or is connected to cylinder
On body；
Fuel tank is arranged in cylinder, and hydraulic pump inlet port is connected to fuel tank, and hydraulic pump oil-out is connected to choke valve, and choke valve returns
Hydraulic fluid port is connected to fuel tank, and choke valve front end is connected with brake oil cylinder.
2. a kind of wiper with dead-man's device according to claim 1, including connection ring it is characterised in that：Connect
Ring is arranged on outside drive end bearing bracket；Connection ring is installed on drive end bearing bracket or is installed on the outer side shield of the corresponding leather cup of drive end bearing bracket.
3. a kind of wiper with dead-man's device according to claim 1, including mounting ring it is characterised in that：Brake
Oil cylinder is fixed in mounting ring, and between described mounting ring and cylinder, screw is fixed.
4. a kind of wiper with dead-man's device according to claim 1 and claim 3 any one, its feature exists
In：Described brake oil cylinder includes Braking piston bar, Braking piston and brake cylinder body, and brake cylinder body is fixed in mounting ring and uses spiral shell
Tether and connect, setting Braking piston in brake cylinder body, Braking piston connects Braking piston bar, and Braking piston bar is connected to heart axle.
5. a kind of wiper with dead-man's device according to claim 1, including connecting rod A it is characterised in that：Connecting rod A
One end connects hydraulic pump, and the other end is hinged on rear end cap or on cylinder.
6. according to claim 1 a kind of wiper with dead-man's device it is characterised in that：Described brake block is sled
Shape, brake block tilts partly near drive end bearing bracket.
7. a kind of wiper with dead-man's device according to claim 1, including sleeve it is characterised in that：Sleeve sets
Put between drive end bearing bracket and heart axle, described sleeve generally cylindrical shape is simultaneously fixed to drive end bearing bracket centre position, heart axle can be in set
Slide in cylinder.
8. a kind of wiper with dead-man's device according to claim 1, including support cylinder, connecting rod D and pole cap, its
It is characterised by：Described support cylinder is arranged on outside rear end cap, and pole cap, connecting rod D one end are installed in the piston rod outer end of support cylinder
It is hinged to the casing of hydraulic pump other end to be hinged on pole cap；Choke valve front end is drawn pressure and is connected with support cylinder.
9. according to claim 8 a kind of wiper with dead-man's device it is characterised in that：Described support cylinder includes
Support cylinder body, support piston, support piston rod；Support cylinder body be fixed to rear end cap on, support piston be arranged on support cylinder body
Interior, support piston to connect and support piston rod, support piston rod outer end that pole cap is installed；The described pole cap generally cylinder with base
Shape, pole cap is buckled in support piston rod end, pole cap both sides setting journal stirrup installing connecting rods D；The described connecting rod D other end is hinged to liquid
On press pump housing.
10. a kind of wiper with dead-man's device according to claim 1, including check valve it is characterised in that：Unidirectional
Valve is arranged on hydraulic pump outlet position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611017496.9A CN106424032B (en) | 2016-11-19 | 2016-11-19 | A kind of wiper with dead-man's device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611017496.9A CN106424032B (en) | 2016-11-19 | 2016-11-19 | A kind of wiper with dead-man's device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106424032A true CN106424032A (en) | 2017-02-22 |
| CN106424032B CN106424032B (en) | 2018-08-14 |
Family
ID=58220921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611017496.9A Expired - Fee Related CN106424032B (en) | 2016-11-19 | 2016-11-19 | A kind of wiper with dead-man's device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106424032B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109158388A (en) * | 2018-08-14 | 2019-01-08 | 上海水威环境技术股份有限公司 | Oil fume pipeline cleaning machine |
| CN112196057A (en) * | 2020-09-18 | 2021-01-08 | 长江生态环保集团有限公司 | In-pipe grouting device and grouting method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0196020A2 (en) * | 1985-03-27 | 1986-10-01 | Pipetronix GmbH | Pig for the electromagnetic testing of the walls of steel pipes, and method of performing it |
| JP2846222B2 (en) * | 1993-09-30 | 1999-01-13 | 東京電力株式会社 | Channel cleaning machine |
| CN103983800A (en) * | 2014-05-27 | 2014-08-13 | 西南石油大学 | Device for acquiring speed of pipe cleaner |
| CN105414120A (en) * | 2016-01-11 | 2016-03-23 | 西南石油大学 | Bypass valve type speed regulating pipe cleaner |
| CN105598103A (en) * | 2016-01-12 | 2016-05-25 | 西南石油大学 | Hydraulic control braking device for pipe cleaner |
| CN105665382A (en) * | 2016-03-10 | 2016-06-15 | 西南石油大学 | Speed-adjustable pig provided with rotary by-pass valve |
-
2016
- 2016-11-19 CN CN201611017496.9A patent/CN106424032B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0196020A2 (en) * | 1985-03-27 | 1986-10-01 | Pipetronix GmbH | Pig for the electromagnetic testing of the walls of steel pipes, and method of performing it |
| JP2846222B2 (en) * | 1993-09-30 | 1999-01-13 | 東京電力株式会社 | Channel cleaning machine |
| CN103983800A (en) * | 2014-05-27 | 2014-08-13 | 西南石油大学 | Device for acquiring speed of pipe cleaner |
| CN105414120A (en) * | 2016-01-11 | 2016-03-23 | 西南石油大学 | Bypass valve type speed regulating pipe cleaner |
| CN105598103A (en) * | 2016-01-12 | 2016-05-25 | 西南石油大学 | Hydraulic control braking device for pipe cleaner |
| CN105665382A (en) * | 2016-03-10 | 2016-06-15 | 西南石油大学 | Speed-adjustable pig provided with rotary by-pass valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109158388A (en) * | 2018-08-14 | 2019-01-08 | 上海水威环境技术股份有限公司 | Oil fume pipeline cleaning machine |
| CN112196057A (en) * | 2020-09-18 | 2021-01-08 | 长江生态环保集团有限公司 | In-pipe grouting device and grouting method |
| CN112196057B (en) * | 2020-09-18 | 2021-10-12 | 长江生态环保集团有限公司 | In-pipe grouting device and grouting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106424032B (en) | 2018-08-14 |
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Granted publication date: 20180814 Termination date: 20191119 |