CN107268639B - Anti- bar hole landslide equipment - Google Patents
Anti- bar hole landslide equipment Download PDFInfo
- Publication number
- CN107268639B CN107268639B CN201710405628.3A CN201710405628A CN107268639B CN 107268639 B CN107268639 B CN 107268639B CN 201710405628 A CN201710405628 A CN 201710405628A CN 107268639 B CN107268639 B CN 107268639B
- Authority
- CN
- China
- Prior art keywords
- stop sleeve
- collapse
- collapse stop
- annular
- position block
- 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.)
- Active
Links
- 239000007788 liquid Substances 0.000 claims description 50
- 235000019994 cava Nutrition 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 13
- 238000009434 installation Methods 0.000 abstract description 4
- 239000002689 soil Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 238000005065 mining Methods 0.000 description 4
- 230000004323 axial length Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
- E02D17/083—Shoring struts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a kind of anti-bar hole landslide equipment, it is desirable to provide and it is a kind of easy for installation, bar hole can be effectively prevent to cave in, to improve working efficiency, guarantee the anti-bar hole landslide equipment of construction safety.It includes: several anti-collapse stop sleevees being sequentially distributed from top to bottom, and the lateral surface top edge of the anti-collapse stop sleeve is equipped with annular upper limit position block, and the medial surface lower edge of anti-collapse stop sleeve is equipped with annular lower position block；In two anti-collapse stop sleevees of arbitrary neighborhood: in the anti-collapse stop sleeve that the annular upper limit position block of the anti-collapse stop sleeve of lower section is located above, the top of the annular lower position block for the anti-collapse stop sleeve that the annular upper limit position block of the anti-collapse stop sleeve of lower section is located above, and the annular upper limit position block of the anti-collapse stop sleeve of lower section is resisted against on the annular lower position block of the anti-collapse stop sleeve of top.
Description
Technical field
The present invention relates to a kind of anti-collapse method, apparatus, and in particular to a kind of anti-bar hole landslide equipment.
Background technique
As China's power grid construction paces are accelerated, power grid scale constantly expands, and the project amount of distribution network construction increases year by year,
Upright bar is one of most common work in power construction, and almost each project implementation is to want upright bar first since upright bar
It first has to carry out wide open digging.
When power circuit is set up, the vertical group of electric pole is previous work, and embedded depth of electric pole has very strict requirements, bar hole position
Soil property is had nothing in common with each other.During power line construction, when encountering sand, cohesive soil, artificial earth fill, soil in digging process
When, phenomena such as bar hole periphery will appear landslide, landslide, very big bar hole face is formed, time-consuming, and there are serious safety is hidden
Suffer from.Therefore, how to solve the problems, such as to cave in when the wide open digging of bar, to improve working efficiency, guarantee that construction safety is very important.
Summary of the invention
The purpose of the present invention is to overcome the shortcomings in the prior art and to provide a kind of easy for installation, can effectively prevent
Only bar hole caves in, to improve working efficiency, guarantees the anti-bar hole landslide equipment of construction safety.
The technical scheme is that
A kind of anti-bar hole landslide equipment, comprising: several anti-collapse stop sleevees being sequentially distributed from top to bottom, the anti-collapse branch
The lateral surface top edge of support set cylinder is equipped with annular upper limit position block, and the medial surface lower edge of anti-collapse stop sleeve is equipped with annular lower limit
Block；In two anti-collapse stop sleevees of arbitrary neighborhood: the annular upper limit position block of the anti-collapse stop sleeve of lower section is located above anti-collapse
In stop sleeve, the annular lower limit for the anti-collapse stop sleeve that the annular upper limit position block of the anti-collapse stop sleeve of lower section is located above
The top of block, and the annular upper limit position block of the anti-collapse stop sleeve of lower section is resisted against the annular lower limit of the anti-collapse stop sleeve of top
On the block of position.
The anti-bar hole landslide equipment of this programme is easy for installation, and bar hole can be effectively prevent to cave in, so that working efficiency is improved,
Guarantee construction safety.
Preferably, annular liquid storage cavity is equipped in the side wall of anti-collapse stop sleeve, on the upper surface of anti-collapse stop sleeve
Equipped with the feed liquor interface being connected with annular liquid storage cavity and liquid interface out, the feed liquor interface is equipped with feed liquor controlled valve,
Liquid interface is equipped with liquid controlled valve out；
In two anti-collapse stop sleevees of arbitrary neighborhood: the anti-collapse branch for going out liquid interface and top of the anti-collapse stop sleeve of lower section
It is connected between the feed liquor interface of support set cylinder by connecting pipe；In the anti-collapse stop sleeve of the top: going out on liquid interface
Equipped with warning from drainage mechanism, warning includes vertical cylinder body, the piston body that vertical cylinder body is arranged in, is arranged in work from drainage mechanism
Vertically operating bar on cock body upper surface, the cylinder body for being arranged on the outer bottom of vertical cylinder body and being connected with vertical inner chamber of cylinder block
Interface, the bar through-hole for being arranged on the outer top surface of vertical cylinder body and being connected with vertical inner chamber of cylinder block and setting are in vertical cylinder body
Lateral surface on drainage hole, the upper end of the vertically operating bar passes through bar through-hole and is located at the top of vertical cylinder body, described
Cylinder body interface is connected with the liquid interface that goes out for the anti-collapse stop sleeve for being located at the top, when piston body is against the interior bottom of vertical cylinder body
When on face: drainage hole is located at the top of piston body.
Preferably, the side wall of anti-collapse stop sleeve includes that annular inboard plate and the annular being set in outside annular inboard plate are outer
Side plate, the cavity between annular inboard plate and annular outboard plate constitute the annular liquid storage cavity.
Preferably, anti-collapse stop sleeve is cylinder.
Preferably, in two anti-collapse stop sleevees of arbitrary neighborhood: the annular upper limit position block of the anti-collapse stop sleeve of lower section
Outer diameter be less than the internal diameter of anti-collapse stop sleeve being located above.
Preferably, the axis vertical of anti-collapse stop sleeve is arranged.
Preferably, anti-collapse stop sleeve is metal sleeve.
The beneficial effects of the present invention are: bar hole can be effectively prevent to cave in easy for installation, so that working efficiency is improved,
Guarantee construction safety.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of landslide equipment in anti-bar hole of the invention.
Fig. 2 is the partial enlarged view in Fig. 1 at A.
Fig. 3 is the partial enlarged view in Fig. 1 at B.
In figure:
Anti-collapse stop sleeve 1a, 1b, 1c, annular liquid storage cavity 1.1, annular upper limit position block 1.2, annular lower position block 1.3,
Feed liquor interface 1.4, out liquid interface 1.5, feed liquor controlled valve 1.6, out liquid controlled valve 1.7；
Connecting pipe 2；
Warning is from drainage mechanism 3, and vertical cylinder body 3.1, drainage hole 3.2, vertically operating bar 3.3, piston body 3.4, cylinder body connects
Mouth 3.5.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing:
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of anti-bar hole caves in equipment, comprising: three be sequentially distributed from top to bottom it is anti-collapse
Stop sleeve, i.e. upper, middle and lower three anti-collapse stop sleeve 1a, 1b, 1c.Anti-collapse stop sleeve is cylinder.Anti-collapse stop sleeve
Axis vertical setting.Anti-collapse stop sleeve is metal sleeve.The axial length of each anti-collapse stop sleeve is identical.
The side wall of anti-collapse stop sleeve includes annular inboard plate and the annular outboard plate that is set in outside annular inboard plate.It is anti-collapse
It is equipped with annular liquid storage cavity 1.1 in the side wall of stop sleeve, the sky in the present embodiment between annular interior plate and annular outboard plate
Chamber constitutes the annular liquid storage cavity.The lateral surface top edge of anti-collapse stop sleeve is equipped with annular upper limit position block 1.2, anti-collapse branch
The medial surface lower edge of support set cylinder is equipped with annular lower position block 1.3.The upper surface of anti-collapse stop sleeve is equipped with and annular liquid storage
The feed liquor interface 1.4 that cavity is connected and liquid interface 1.5 out.Feed liquor interface is equipped with feed liquor controlled valve 1.6, out on liquid interface
Equipped with liquid controlled valve 1.7 out.
In two anti-collapse stop sleevees of arbitrary neighborhood: the outer diameter of the annular upper limit position block of the anti-collapse stop sleeve of lower section is less than
The internal diameter for the anti-collapse stop sleeve being located above, the anti-collapse branch that the annular upper limit position block of the anti-collapse stop sleeve of lower section is located above
In support set cylinder, the annular lower position block for the anti-collapse stop sleeve that the annular upper limit position block of the anti-collapse stop sleeve of lower section is located above
Top, and the annular upper limit position block of the anti-collapse stop sleeve of lower section be resisted against top anti-collapse stop sleeve annular lower limit
On block；Pass through connecting tube between the feed liquor interface of the anti-collapse stop sleeve for going out liquid interface and top of the anti-collapse stop sleeve of lower section
Road 2 is connected.
As shown in Figure 1, Figure 3, in the anti-collapse stop sleeve of the top: going out liquid interface and be equipped with warning from drainage mechanism
3.Warning includes vertical cylinder body 3.1, the piston body 3.4 that vertical cylinder body is arranged in, end face on the piston body is arranged from drainage mechanism
On vertically operating bar 3.3, the cylinder body interface that is arranged on the outer bottom of vertical cylinder body and is connected with vertical inner chamber of cylinder block
3.5, it is arranged on the outer top surface of vertical cylinder body and the bar through-hole being connected with vertical inner chamber of cylinder block and setting is in vertical cylinder body
Lateral surface on drainage hole 3.2.The upper end of vertically operating bar passes through bar through-hole and is located at the top of vertical cylinder body.Cylinder body connects
Mouth is connected with the liquid interface that goes out for the anti-collapse stop sleeve for being located at the top.When piston body is against on the inner bottom surface of vertical cylinder body
When: drainage hole is located at the top of piston body.
The present embodiment anti-bar hole landslide equipment it is specifically used as follows:
It fills in the annular liquid storage chamber body of each anti-collapse stop sleeve with coloured liquid, for example, red liquid.
In the mining process of bar hole:
First, when the excavating depth in bar hole reaches setting value, anti-collapse stop sleeve 1a is placed in bar hole, anti-collapse support
The annular upper limit position block cooperation of the inner wall tight fit of sleeve 1a and bar hole, anti-collapse stop sleeve 1a carries out anti-collapse stop sleeve 1a
Support, the soil pressure from bar hole surrounding is supported by anti-collapse stop sleeve, thus it is possible to prevente effectively from native around bar hole
Matter landslide, shortens the landslide class bar wide open digging operating time, to improve working efficiency, guarantees construction safety；
Meanwhile opening the liquid controlled valve that goes out of anti-collapse stop sleeve 1a gone out on liquid interface, by anti-collapse stop sleeve 1a
Feed liquor interface on feed liquor controlled valve close；If there is the soil pressure of surrounding in the mining process of next bar hole in this way
It is excessive, by the compressive strain inside of anti-collapse stop sleeve, the volume of the annular liquid storage chamber of anti-collapse stop sleeve 1a is made to become smaller, to make to warn
Show from the piston body of drainage mechanism and moves up, after piston body is moved to above drainage hole, the annular liquid storage of anti-collapse stop sleeve 1a
The coloured liquid of the intracorporal band of chamber will overflow, to play the role of alarm and warning, remind the careful operation of operating personnel, into
One step guarantees working security.
Second, anti-collapse stop sleeve 1b is put into；Then, continue to excavate bar hole down, when the excavating depth and two in bar hole
When the sum of the axial length of a anti-collapse stop sleeve is identical, the lower surface of the annular upper limit position block of anti-collapse stop sleeve 1b is resisted against
On the upper surface of the annular lower position block of anti-collapse stop sleeve 1a；The inner wall tight fit of anti-collapse stop sleeve 1b and bar hole, pass through
Anti-collapse stop sleeve supports the soil pressure from bar hole surrounding, thus it is possible to prevente effectively from soil property is caved in around bar hole, contracting
The short landslide class bar wide open digging operating time guarantees construction safety to improve working efficiency；
Followed by, by connecting pipe by anti-collapse stop sleeve 1b go out liquid interface and anti-collapse stop sleeve 1a feed liquor connect
Mouth connection；Then, the feed liquor controlled valve on the feed liquor interface of anti-collapse stop sleeve 1a is opened, by anti-collapse stop sleeve 1b's
The liquid controlled valve that goes out on liquid interface is opened out, and the feed liquor controlled valve on the feed liquor interface of anti-collapse stop sleeve 1b is closed；
If the soil pressure for occurring surrounding in the mining process of next bar hole in this way is excessive, when any one anti-collapse stop sleeve occurs
It deforms (compressive strain inside of anti-collapse stop sleeve), then the volume of the annular liquid storage chamber of anti-collapse stop sleeve becomes smaller, to make to warn
It is moved up from the piston body of drainage mechanism, after piston body is moved to above drainage hole, the annular liquid storage cavity of anti-collapse stop sleeve
Interior will be overflowed with coloured liquid by drainage hole, to play the role of alarm and warning, be further ensured that construction safety
Property.
Anti-collapse stop sleeve 1c is put by third, then, continues to excavate bar hole down, when the excavating depth and three in bar hole
When the sum of the axial length of a anti-collapse stop sleeve is identical, the lower surface of the annular upper limit position block of anti-collapse stop sleeve 1c is resisted against
On the upper surface of the annular lower position block of anti-collapse stop sleeve 1b；The inner wall tight fit of anti-collapse stop sleeve 1c and bar hole, pass through
Anti-collapse stop sleeve supports the soil pressure from bar hole surrounding, thus it is possible to prevente effectively from soil property is caved in around bar hole, contracting
The short landslide class bar wide open digging operating time guarantees construction safety to improve working efficiency；
Followed by, by connecting pipe by anti-collapse stop sleeve 1c go out liquid interface and anti-collapse stop sleeve 1b feed liquor connect
Mouth connection；Then, the feed liquor controlled valve on the feed liquor interface of anti-collapse stop sleeve 1b is opened, by anti-collapse stop sleeve 1c's
The liquid controlled valve that goes out on liquid interface is opened out, and the feed liquor controlled valve on the feed liquor interface of anti-collapse stop sleeve 1c is closed；
If the soil pressure for occurring surrounding in the mining process of next bar hole in this way is excessive, when any one anti-collapse stop sleeve occurs
It deforms (compressive strain inside of anti-collapse stop sleeve), then the volume of the annular liquid storage chamber of anti-collapse stop sleeve becomes smaller, to make to warn
It is moved up from the piston body of drainage mechanism, after piston body is moved to above drainage hole, the annular liquid storage cavity of anti-collapse stop sleeve
Interior will be overflowed with coloured liquid by drainage hole, to play the role of alarm and warning, operating personnel be reminded to make with caution
Industry is further ensured that working security.
Claims (5)
- The equipment 1. a kind of anti-bar hole caves in, characterized in that include: several anti-collapse stop sleevees being sequentially distributed from top to bottom, institute The lateral surface top edge for stating anti-collapse stop sleeve is equipped with annular upper limit position block, and the medial surface lower edge of anti-collapse stop sleeve is equipped with ring Shape lower position block；In two anti-collapse stop sleevees of arbitrary neighborhood: the annular upper limit position block of the anti-collapse stop sleeve of lower section is located above anti-collapse In stop sleeve, the annular lower limit for the anti-collapse stop sleeve that the annular upper limit position block of the anti-collapse stop sleeve of lower section is located above The top of block, and the annular upper limit position block of the anti-collapse stop sleeve of lower section is resisted against the annular lower limit of the anti-collapse stop sleeve of top On the block of position；Annular liquid storage cavity is equipped in the side wall of the anti-collapse stop sleeve, the upper surface of anti-collapse stop sleeve is equipped with and annular The feed liquor interface that liquid storage cavity is connected and liquid interface out, the feed liquor interface is equipped with feed liquor controlled valve, out on liquid interface Equipped with liquid controlled valve out；In two anti-collapse stop sleevees of arbitrary neighborhood: the anti-collapse support sleeve for going out liquid interface and top of the anti-collapse stop sleeve of lower section It is connected between the feed liquor interface of cylinder by connecting pipe；In the anti-collapse stop sleeve of the top: going out liquid interface and be equipped with warning from drainage mechanism, warn from drainage mechanism packet It includes vertical cylinder body, the intracorporal piston body of vertical cylinder, the vertically operating bar being arranged on end face on the piston body, setting is set perpendicular The cylinder body interface that is connected on the outer bottom of straight-cylinder body and with vertical inner chamber of cylinder block, be arranged on the outer top surface of vertical cylinder body and with The vertical inner chamber of cylinder block bar through-hole being connected and the drainage hole being arranged on the lateral surface of vertical cylinder body, the vertically operating bar Upper end pass through bar through-hole and be located at vertical cylinder body top, the cylinder body interface be located at the top anti-collapse stop sleeve Go out liquid interface be connected, when piston body is against on the inner bottom surface of vertical cylinder body: drainage hole is located at the top of piston body；The anti-collapse stop sleeve is metal sleeve.
- The equipment 2. anti-bar hole according to claim 1 caves in, characterized in that the side wall of the anti-collapse stop sleeve includes ring Shape interior plate and the annular outboard plate being set in outside annular inboard plate, the cavity between annular inboard plate and annular outboard plate are constituted The annular liquid storage cavity.
- The equipment 3. anti-bar hole according to claim 1 caves in, characterized in that the anti-collapse stop sleeve is cylinder.
- The equipment 4. anti-bar hole according to claim 3 caves in, characterized in that in two anti-collapse stop sleevees of arbitrary neighborhood: The outer diameter of the annular upper limit position block of the anti-collapse stop sleeve of lower section is less than the internal diameter for the anti-collapse stop sleeve being located above.
- The equipment 5. anti-bar hole according to claim 3 caves in, characterized in that the axis vertical of the anti-collapse stop sleeve is set It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710405628.3A CN107268639B (en) | 2017-06-01 | 2017-06-01 | Anti- bar hole landslide equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710405628.3A CN107268639B (en) | 2017-06-01 | 2017-06-01 | Anti- bar hole landslide equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107268639A CN107268639A (en) | 2017-10-20 |
| CN107268639B true CN107268639B (en) | 2019-05-07 |
Family
ID=60065003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710405628.3A Active CN107268639B (en) | 2017-06-01 | 2017-06-01 | Anti- bar hole landslide equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107268639B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109137952B (en) * | 2018-10-30 | 2020-09-08 | 晋江知保企业管理咨询有限公司 | Reinforcing device and reinforcing method for open caisson in weak soil layer section |
| CN110593275B (en) * | 2019-09-04 | 2021-03-19 | 浙江化工工程地质勘察院有限公司 | Foundation pit support system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB993233A (en) * | 1964-03-18 | 1965-05-26 | John Joseph Dougherty | Collapsible filing |
| CN102677658A (en) * | 2012-04-25 | 2012-09-19 | 北京市三一重机有限公司 | Pile construction method and pile casings |
| CN103924603A (en) * | 2014-03-11 | 2014-07-16 | 国家电网公司 | Tool for preventing pole pit soil collapse and method for using same to dig pole pit |
| CN105904391A (en) * | 2016-05-25 | 2016-08-31 | 太仓市浏河镇巧梅五金加工厂 | Retractable socket wrench |
| CN206903660U (en) * | 2017-06-01 | 2018-01-19 | 国网浙江省电力公司丽水供电公司 | A kind of anti-bar hole landslide equipment |
-
2017
- 2017-06-01 CN CN201710405628.3A patent/CN107268639B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB993233A (en) * | 1964-03-18 | 1965-05-26 | John Joseph Dougherty | Collapsible filing |
| CN102677658A (en) * | 2012-04-25 | 2012-09-19 | 北京市三一重机有限公司 | Pile construction method and pile casings |
| CN103924603A (en) * | 2014-03-11 | 2014-07-16 | 国家电网公司 | Tool for preventing pole pit soil collapse and method for using same to dig pole pit |
| CN105904391A (en) * | 2016-05-25 | 2016-08-31 | 太仓市浏河镇巧梅五金加工厂 | Retractable socket wrench |
| CN206903660U (en) * | 2017-06-01 | 2018-01-19 | 国网浙江省电力公司丽水供电公司 | A kind of anti-bar hole landslide equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107268639A (en) | 2017-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104389623B (en) | Shield tunnel prefabricated tunnel segment lining back stratum grouting device | |
| CN106499408B (en) | Wholecircle full section of tunnel one-pass molding self-compacting concrete pouring construction method | |
| CN105239965A (en) | Gas injection and brine discharge method for salt-cavern gas storage | |
| CN107268639B (en) | Anti- bar hole landslide equipment | |
| CN103912302B (en) | A kind of layer-through drilling hydraulic rupture gas pumping method | |
| CN106872334A (en) | A kind of method of the prominent mud Excavation simulation device of gushing water and the prominent mud disaster of simulation gushing water | |
| CN109138904A (en) | Twin packer delamination pour slurry antipriming and its application method | |
| CN106930746A (en) | The alternative expression coal seam anti-reflection method that drilling acetone invasion and attack are combined with hydraulic fracturing | |
| CN103643690A (en) | Deep-foundation-pit exploration-hole water-gushing processing method | |
| CN206903660U (en) | A kind of anti-bar hole landslide equipment | |
| CN204960882U (en) | Underground hydraulic fracturing drill hole sealing device of coal mine | |
| CN109026085A (en) | A kind of coal mining high tensile steel tube concrete pillar and its application method | |
| CN203755310U (en) | Pile washing nozzle of self-elevating platform pile shoe | |
| CN206829631U (en) | A kind of cold weather concrete thermometer hole indwelling equipment | |
| CN208502832U (en) | A kind of novel coal bed gas extraction experimental simulation device | |
| CN105804690B (en) | In-situ leaching process drilling inverse water mud device | |
| CN104234684B (en) | A kind of pressure control opening type fracturing sliding bush | |
| CN203798477U (en) | Two-loop hydraulic-fracturing geostress-testing device for wire-line coring drill rod | |
| CN102979105A (en) | Underground water control method of wellhole grouting and seepage insulation | |
| CN202546006U (en) | High pressure-resistant sealing device used for intermediate jacking station of pipe jacking equipment | |
| CN204662467U (en) | Underground structure dewatering well sealing water device | |
| CN211715095U (en) | Ceramic rupture disc device for temporary well plugging of well completion pipe string | |
| CN206960305U (en) | A kind of prominent mud Excavation simulation device of gushing water | |
| CN202450511U (en) | Grouting device | |
| CN204532227U (en) | A kind of oil well time delay self-expansion type inserts sealing tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | 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 |