CN109826570A - A kind of New drilling machine reducing drilling rod - Google Patents
A kind of New drilling machine reducing drilling rod Download PDFInfo
- Publication number
- CN109826570A CN109826570A CN201910265955.2A CN201910265955A CN109826570A CN 109826570 A CN109826570 A CN 109826570A CN 201910265955 A CN201910265955 A CN 201910265955A CN 109826570 A CN109826570 A CN 109826570A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- flange
- bar
- bars
- reducing
- 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
- 238000005553 drilling Methods 0.000 title claims abstract description 96
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 210000003371 toe Anatomy 0.000 claims abstract description 16
- 238000003466 welding Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 241000233855 Orchidaceae Species 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of New drilling machine reducing drilling rods, two bar tops are provided with reducing sleeve, the top of reducing sleeve is provided with flange and seamless steel pipe, flange is respectively welded at seamless steel pipe both ends, the lower part of reducing sleeve and the superstructure of reducing sleeve are identical, the top of reducing sleeve and the lower part of reducing sleeve are bolted, two bar internal keies are provided on two bar inner sidewalls, two bar external keys are provided on the outside of two bars, interior bar is additionally provided with inside two bars, interior bar one end is provided with lifting lug, the interior bar other end is provided with square toes, square toes top is provided with spring, spring top is provided with water-output flange, two bars are arranged in power head, removable actuating sleeve is provided between power head and two bars, removable actuating sleeve both ends are respectively arranged with flange A and flange B, removable actuating sleeve is internally provided with actuating sleeve internal key, it is provided on the outside of removable actuating sleeve Actuating sleeve external key；The present invention has the advantages that adjusting is simple, it is good to save resource, using effect.
Description
Technical field
The present invention relates to rotary drilling rig technical fields, and in particular to a kind of New drilling machine reducing drilling rod.
Background technique
Drilling machine drilling rod is welded using the seamless steel pipe of special material, usually when rotary drilling rig works, is bored
Bar can be made of multiple poles, wherein one end of most acromere or title first segment is welded with upper flange and lower flange, other end
It is welded with the seamless steel pipe with internal keyway, is entirely welded with external key, and the second section, third on the outside of the steel pipe of most acromere
Section ..., the n-th section be the same structure type, only seamless steel pipe diameter is in different size, the size phase of each section
Difference is the height of spline and the wall thickness of steel pipe；External key is welded on the outside of most internal segment drilling rod, but square toes, other end weldering are welded in one end
It is connected to lifting lug, is combined from first segment to the n-th section using the different seamless steel pipe of diameter, the external key of each section and upper one
The internal key clearance fit of section, such combination just can guarantee drilling rod when in use, can either stretch, and can also pass through external key
Torque is transmitted with the lateral pressure of internal key, drilling rod when in use, the more piece combination side of upper lower flange is welded with using this most acromere
Formula is referred to as drilling rod normal combination, and this traditional combination can not deploy the joint number of drilling rod according to actual situations of construction,
If you do not need to the drilling rod of especially more piece is constructed, at this moment just needs to remake new drilling rod, cause the waste of resource；
Therefore it provides a kind of adjusting is simple, saving resource, using effect, good New drilling machine reducing drilling rod is to be highly desirable
's.
Summary of the invention
The purpose of the invention is to overcome the deficiencies in the prior art, and it is high, easy to provide a kind of performance easy to use, safe
The steel tower of operation climbs brake apparatus and uplink and downlink method in Defend, fall device guide rail.
The object of the present invention is achieved like this: a kind of New drilling machine reducing drilling rod, it include two bars, described two
Bar top is provided with reducing sleeve, and the reducing sleeve is made of upper and lower two parts, and the top of the reducing sleeve is provided with flange and nothing
Steel pipe is stitched, flange is respectively welded at seamless steel pipe both ends, and the lower part of reducing sleeve and the superstructure of reducing sleeve are identical, reducing sleeve
Top and the lower part of reducing sleeve are bolted, and two bar internal keies are provided on the two bars inner sidewall, are set on the outside of two bar
Two bar external keys are equipped with, interior bar is additionally provided with inside two bar, described interior bar one end is provided with lifting lug, and the interior bar other end is provided with
Square toes, the square toes top are provided with spring, and the spring top is provided with water-output flange, and two bar is arranged in power head
It is interior, removable actuating sleeve is provided between the power head and two bars, the removable actuating sleeve both ends are respectively arranged with flange A
With flange B, the outside flange B is additionally provided with fixed plate, and the removable actuating sleeve is internally provided with actuating sleeve internal key, described
Actuating sleeve external key is provided on the outside of removable actuating sleeve.
The one end of reducing sleeve by bolted connection with two bars without internal key is connect, and reducing sleeve is connect with two bars
Mode be it is detachable, it is different from traditional connection type of most acromere drilling rod, traditional connection be most acromere one end weldering
It connects, lower flange, therefore drilling rod made by this mode can only be used as most acromere, limit drilling rod uses diameter, nothing
Method adjusts the quantity of inner drill rods, and the connection type of this reducing sleeve can be very good to solve the problems, such as this, can be set and is passing
It unites in the inner drill rods of drilling rod, connects by bolted connection, it is easy to disassemble and install.
Detachable actuating sleeve is arranged on power head by the flange A and flange B at both ends, can be with the driving inside power head
Mechanism is rotated, and the flange at detachable actuating sleeve both ends is for being limited in power head, and the flange at both ends passes through
The mode of threaded connection, it is easy to disassemble.
Also be nested three bars, four bars inside two bars, the interior bar setting in penetralia, internal structure with it is existing
Jackrod structure is identical, and the drilling rod of multiple and different diameters is arranged in inside, and secondary acromere of two bars as drilling rod is only second to the outer of drilling rod
Section, since traditional acromere can not be replaced, the fixed drilling rod pot life system of diameter is more, and above-mentioned connector sleeve can be with
It is arranged on three bars or four bars, is configured according to different needs, has achieved the purpose that variable-diameter.
The size of detachable actuating sleeve external key can be adjusted according to the groove width on power head, the detachable actuating sleeve internal key
It can be adjusted according to the size of two bar external keys, detachable actuating sleeve is used between power head and drilling rod, due to detachably driving
Dynamic set is provided with external key and internal key, and actuating sleeve external key needs and power head matches, it is therefore desirable to pass through the connection side of interior external key
Formula is attached, and can be realized torsion and pressure to detachable actuating sleeve, to drive setting inside detachable actuating sleeve
Drilling rod, and detachable actuating sleeve will also be cooperated with drilling rod, so actuating sleeve internal key can be connected with the external key of drilling rod
It connects, the principle of detachable actuating sleeve is exactly to replace original most acromere drilling rod using welding manner mounting flange, will be original
Most acromere drilling rod is set as dismountable actuating sleeve, will not influence the normal operation of power head.
The mode that fixed plate is bolted or welds is connect with flange B.
The pipe thickness of detachable actuating sleeve can be adjusted according to the distance between power head and two bars, and can make can
Disassembly actuating sleeve is sufficiently contacted with power head and two bars, and the connection being not limited only between detachable actuating sleeve and two bars can basis
Concrete condition when use adjusts the diameter of drilling rod at any time, and the inner drill rods of drilling rod corresponding to different-diameter are different, therefore
In the case that power head is certain, the detachable actuating sleeve of different-diameter can choose to realize intact contact performance, thus band
Dynamic drilling rod operates normally.
Beneficial effects of the present invention: the present invention uses special combination are as follows: in the base of the combination of conventional drill
On plinth, remove most acromere drilling rod, that is, remove a bar, reducing sleeve, peace inside rotary digging drill power head are installed on secondary acromere drilling rod
Removable actuating sleeve is filled, then original each section is constant, and spring is mounted on the top of square toes, and water outlet is equipped with above spring
Flange is equipped with all every sections in addition to the most acromere of original tape welding acting flange on water-output flange.Such specific combination side
Formula makes that drilling rod has lacked at work and the most acromere of original conventional combination has lacked the most acromere of tape welding acting flange in other words, so
One end of secondary acromere is equipped with the reducing sleeve being bolted afterwards, then the removable power head inside power head is cooperated to drive
Set, can meet construction requirement；The present invention has the advantages that a kind of adjusting is simple, it is good to save resource, using effect.
Detailed description of the invention
Fig. 1 is for the combining structure schematic diagram of traditional drilling machine drilling rod.
Fig. 2 is traditional one rod structure schematic diagram of drilling machine drilling rod.
Fig. 3 is traditional two rod structure schematic diagram of drilling machine drilling rod.
Fig. 4 is traditional drilling machine drilling rod interior bar structural schematic diagram.
Fig. 5 is traditional drilling machine drilling rod combination schematic cross-sectional view.
Fig. 6 is that traditional drilling machine drilling rod installs and uses structural schematic diagram.
Fig. 7 is New drilling machine reducing drill rod combination structure schematic diagram of the present invention.
Fig. 8 is New drilling machine reducing drilling rod combination schematic cross-sectional view of the present invention.
Fig. 9 is the detachable actuating sleeve structural schematic diagram of New drilling machine reducing drilling rod of the present invention.
Figure 10 is the detachable actuating sleeve schematic cross-section of New drilling machine reducing drilling rod of the present invention.
Figure 11 is New drilling machine reducing drilling rod connecting jacket structure schematic diagram of the present invention.
Figure 12 is that New drilling machine reducing drilling rod of the present invention installs and uses structural schematic diagram.
1, rotary drill rod 2, a bar 3, two bars 4, interior bar 5, upper flange 6, lower flange 7, square toes 8, pin hole in figure
9, spring 10, a bar external key 11, a rod tube wall 12, a bar internal key 13, two pole spacing plates 14, two rod tube walls 15, outside two bars
Key 16, lifting lug 18, interior bar external key 19, three bars 20, four bars 21, power head 22, reducing sleeve 23, goes out two bar internal keies 17
Water law orchid 24, removable actuating sleeve 25, flange A 26, flange B 27, fixed plate 28, actuating sleeve external key 29, in actuating sleeve
Key 30, flange 31, seamless steel pipe.
Specific embodiment
Following further describes the present invention with reference to the drawings.
Embodiment 1
It is as shown in figures 1 to 6 traditional rotary drilling rig, drilling rod is welded using the seamless steel pipe of special material, wherein a bar 2
Or one end of first segment drilling rod is claimed to be welded with upper flange 5 and lower flange 6, other end is welded with the seamless steel pipe with internal key.
It is welded with a bar external key 10 on the outside of the steel pipe of an entire bar 2, forms the structure type shown such as Fig. 2.Two bars 3, three bars ...,
N-th section is the same structure type, and only seamless steel pipe size is in different size, and the size difference of each section is external key
Height and steel pipe wall thickness.It is welded with interior bar external key 18 on the outside of interior bar, but one end is welded as square toes 7, other end is welded with
Lifting lug.It is combined from first segment to the n-th section using the different seamless steel pipe of diameter, the external key of each section and a upper section
Internal key clearance fit, such combination just can guarantee drilling rod when in use, can either stretch, and can also pass through spline and key
The lateral pressure of slot transmits torque.Drilling rod when in use, is claimed using the more piece combination that this most acromere is welded with upper lower flange
Be drilling rod normal combination.Combination when this combination is the construction of traditional rotary drilling rig, also referred to as drilling rod conventional combination mode.
There is provided a kind of New drilling machine reducing drilling rod as shown in fig.7-12 for the present invention, it include two bars 3, described two
3 top of bar is provided with reducing sleeve 22, and the reducing sleeve 22 is made of upper and lower two parts, and the top of the reducing sleeve 22 is provided with method
Orchid 30 and seamless steel pipe 31, flange 30 are respectively welded at 31 both ends of seamless steel pipe, and the lower part of reducing sleeve 22 is upper with reducing sleeve 22
Portion's structure is identical, and the top of reducing sleeve 22 and the lower part of reducing sleeve 22 are bolted, and is provided on two bars, 3 inner sidewall
Two bar internal keies 16 are provided with two bar external keys 15 on the outside of two bar 3, interior bar 4, the interior bar 4 are additionally provided with inside two bar 3
One end is provided with lifting lug 17, and 4 other end of interior bar is provided with square toes 7, and 7 top of square toes is provided with spring 9, on the spring 9
Portion is provided with water-output flange 23, and two bar 3 is arranged in power head 21, and being provided between the power head 21 and two bars 3 can
Actuating sleeve 24 is dismounted, removable 24 both ends of actuating sleeve are respectively arranged on the outside of flange A25 and flange B26, the flange B26
It is additionally provided with fixed plate 27, the removable actuating sleeve 24 is internally provided with actuating sleeve internal key 29, the removable actuating sleeve 24
Outside is provided with actuating sleeve external key 28.
The present invention uses special combination are as follows: on the basis of the combination of conventional drill, removes most acromere brill
Bar removes a bar 2, reducing sleeve 22 is installed on secondary acromere drilling rod, installs removable driving inside rotary digging drill power head 21
Set 24, then original each section is constant, and spring 9 is mounted on the top of square toes 7, and the top of spring 9 is equipped with water-output flange 23,
All every sections in addition to the most acromere of original tape welding acting flange are installed on water-output flange 23.Such specific combination mode makes
Drilling rod has lacked and the most acromere of original conventional combination has lacked the most acromere of tape welding acting flange in other words at work, it is then secondary
One end of acromere is equipped with the reducing sleeve 22 being bolted, then cooperates the removable actuating sleeve 24 of 21 the inside of power head, i.e.,
Construction requirement can be met；The present invention has the advantages that a kind of adjusting is simple, it is good to save resource, using effect.
Embodiment 2
A kind of New drilling machine reducing drilling rod is provided for the present invention as shown in fig.7-12, it includes two bars 3, two bar 3
Top is provided with reducing sleeve 22, and the reducing sleeve 22 is made of upper and lower two parts, and the top of the reducing sleeve 22 is provided with flange
30 and seamless steel pipe 31, flange 30 is respectively welded at 31 both ends of seamless steel pipe, the lower part of reducing sleeve 22 and the top of reducing sleeve 22
Structure is identical, and the top of reducing sleeve 22 and the lower part of reducing sleeve 22 are bolted, and is provided with two on two bars, 3 inner sidewall
Bar internal key 16 is provided with two bar external keys 15 on the outside of two bar 3, interior bar 4, the interior bar 4 one is additionally provided with inside two bar 3
End is provided with lifting lug 17, and 4 other end of interior bar is provided with square toes 7, and 7 top of square toes is provided with spring 9,9 top of spring
It is provided with water-output flange 23, two bar 3 is arranged in power head 21, is provided between the power head 21 and two bars 3 removable
Actuating sleeve 24 is filled, removable 24 both ends of actuating sleeve are respectively arranged on the outside of flange A25 and flange B26, the flange B26 also
It is provided with fixed plate 27, the removable actuating sleeve 24 is internally provided with actuating sleeve internal key 29, outside the removable actuating sleeve 24
Side is provided with actuating sleeve external key 28.
The one end of reducing sleeve 22 by bolted connection with two bars 3 without two bar internal keies 16 is connect.
Detachable actuating sleeve 24 is arranged on power head 21 by the flange A25 and flange B26 at both ends, can be with power head 21
Internal driving mechanism is rotated.
Three bars, four bars are also nested inside two bars 3, the interior bar 4 is arranged in penetralia.
The size of 24 external key of detachable actuating sleeve can be adjusted according to the groove width on power head 21, the actuating sleeve internal key 29
It can be adjusted according to the size of two bar external keys 15.
The mode that fixed plate 27 is bolted or welds is connect with flange B26.
The pipe thickness of detachable actuating sleeve 24 can be adjusted according to the distance between power head 21 and two bars 3, energy
Contact detachable actuating sleeve 24 sufficiently with power head 21 and two bars 3.
The present invention uses special combination are as follows: on the basis of the combination of conventional drill, removes most acromere brill
Bar removes a bar 2, reducing sleeve 22 is installed on secondary acromere drilling rod, installs removable driving inside rotary digging drill power head 21
Set 24, then original each section is constant, and spring 9 is mounted on the top of square toes 7, and the top of spring 9 is equipped with water-output flange 23,
All every sections in addition to the most acromere of original tape welding acting flange are installed on water-output flange 23.Such specific combination mode makes
Drilling rod has lacked and the most acromere of original conventional combination has lacked the most acromere of tape welding acting flange in other words at work, it is then secondary
One end of acromere is equipped with the reducing sleeve 22 being bolted, then cooperates the removable actuating sleeve 24 of 21 the inside of power head, i.e.,
Construction requirement can be met；The present invention has the advantages that a kind of adjusting is simple, it is good to save resource, using effect.
Claims (7)
1. a kind of New drilling machine reducing drilling rod, it includes two bars, it is characterised in that: two bar top is provided with switching
Set, the reducing sleeve are made of upper and lower two parts, and the top of the reducing sleeve is provided with flange and seamless steel pipe, and flange welds respectively
It connects at seamless steel pipe both ends, the lower part of reducing sleeve and the superstructure of reducing sleeve are identical, under the top and reducing sleeve of reducing sleeve
Portion is bolted, and two bar internal keies are provided on the two bars inner sidewall, are provided with two bar external keys on the outside of two bar, described
Interior bar is additionally provided with inside two bars, described interior bar one end is provided with lifting lug, and the interior bar other end is provided with square toes, the square toes top
It is provided with spring, the spring top is provided with water-output flange, and two bar is arranged in power head, the power head and two bars
Between be provided with removable actuating sleeve, the removable actuating sleeve both ends are respectively arranged with outside flange A and flange B, the flange B
Side is additionally provided with fixed plate, and the removable actuating sleeve is internally provided with actuating sleeve internal key, sets on the outside of the removable actuating sleeve
It is equipped with actuating sleeve external key.
2. New drilling machine reducing drilling rod as described in claim 1, it is characterised in that: the reducing sleeve is connected by bolt
The one end of the mode connect with two bars without two bar internal keies is connect.
3. New drilling machine reducing drilling rod as described in claim 1, it is characterised in that: the detachable actuating sleeve passes through
The flange A and flange B at both ends are arranged on power head, can be rotated with the driving mechanism inside power head.
4. New drilling machine reducing drilling rod as described in claim 1, it is characterised in that: also nesting is set inside two bar
Three bars, four bars are equipped with, the interior bar is arranged in penetralia.
5. New drilling machine reducing drilling rod as described in claim 1, it is characterised in that: the detachable actuating sleeve external key
Size can be adjusted according to the groove width on power head, the actuating sleeve internal key can be adjusted according to the size of two bar external keys
Section.
6. New drilling machine reducing drilling rod as described in claim 1, it is characterised in that: the fixed plate is connected by bolt
The mode for connecing or welding is connect with flange B.
7. New drilling machine reducing drilling rod as described in claim 1, it is characterised in that: the pipe of the detachable actuating sleeve
Wall thickness can be adjusted according to the distance between power head and two bars, can make detachable actuating sleeve sufficiently with power head and
The contact of two bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910265955.2A CN109826570B (en) | 2019-04-03 | 2019-04-03 | Novel rotary drilling rig diameter-variable drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910265955.2A CN109826570B (en) | 2019-04-03 | 2019-04-03 | Novel rotary drilling rig diameter-variable drill rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109826570A true CN109826570A (en) | 2019-05-31 |
| CN109826570B CN109826570B (en) | 2024-05-14 |
Family
ID=66874038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910265955.2A Active CN109826570B (en) | 2019-04-03 | 2019-04-03 | Novel rotary drilling rig diameter-variable drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109826570B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202451073U (en) * | 2012-03-08 | 2012-09-26 | 王秀民 | Drill rod connecting sleeve of rotary drilling rig |
| CN204113133U (en) * | 2014-09-23 | 2015-01-21 | 英联鑫博(天津)机械制造有限公司 | A kind of drilling machine drilling rod |
| CN104481393A (en) * | 2014-12-12 | 2015-04-01 | 徐州徐工基础工程机械有限公司 | Power transmission structure of rotary drilling rig |
| CN104612597A (en) * | 2014-12-10 | 2015-05-13 | 上海中联重科桩工机械有限公司 | Core section rod and rotary drilling rig drill rod with same |
| CN205089208U (en) * | 2015-10-29 | 2016-03-16 | 山东弘方重工机械有限公司 | Drive sleeve for power head of rotary drilling rig |
| CN209724245U (en) * | 2019-04-03 | 2019-12-03 | 郑州富岛机械设备有限公司 | A kind of New drilling machine reducing drilling rod |
| WO2021068557A1 (en) * | 2019-10-12 | 2021-04-15 | 王云根 | Rotary drilling rig power head and corresponding rotary drilling rig |
-
2019
- 2019-04-03 CN CN201910265955.2A patent/CN109826570B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202451073U (en) * | 2012-03-08 | 2012-09-26 | 王秀民 | Drill rod connecting sleeve of rotary drilling rig |
| CN204113133U (en) * | 2014-09-23 | 2015-01-21 | 英联鑫博(天津)机械制造有限公司 | A kind of drilling machine drilling rod |
| CN104612597A (en) * | 2014-12-10 | 2015-05-13 | 上海中联重科桩工机械有限公司 | Core section rod and rotary drilling rig drill rod with same |
| CN104481393A (en) * | 2014-12-12 | 2015-04-01 | 徐州徐工基础工程机械有限公司 | Power transmission structure of rotary drilling rig |
| CN205089208U (en) * | 2015-10-29 | 2016-03-16 | 山东弘方重工机械有限公司 | Drive sleeve for power head of rotary drilling rig |
| CN209724245U (en) * | 2019-04-03 | 2019-12-03 | 郑州富岛机械设备有限公司 | A kind of New drilling machine reducing drilling rod |
| WO2021068557A1 (en) * | 2019-10-12 | 2021-04-15 | 王云根 | Rotary drilling rig power head and corresponding rotary drilling rig |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109826570B (en) | 2024-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108560716B (en) | Steel pipe concrete column beam joint structure and construction method thereof | |
| CN101737016B (en) | Torque-withstanding drill pipe elevating device | |
| CN202831233U (en) | Connected node of protracting inner diaphragm steel girder and concrete-filled steel-tubular columns inscribed a pipe coat | |
| CN207363606U (en) | A kind of drilling machine sliding system | |
| CN104179256A (en) | Rectangular concrete filled steel tube column and steel beam single-side bolt connecting joint and construction method thereof | |
| CN209724245U (en) | A kind of New drilling machine reducing drilling rod | |
| CN108643671B (en) | Four-steel-pipe constraint type buckling-restrained brace with replaceable cross-shaped inner core | |
| CN203008133U (en) | High-strength bolt hub-shaped pitch point with single-layer latticed shell | |
| CN108842915A (en) | A kind of rigid connection node and its processing installation method of steel construction rectangle rod piece | |
| CN109826570A (en) | A kind of New drilling machine reducing drilling rod | |
| CN106677505A (en) | Adjustable steel tube supporting piece and installation method thereof | |
| CN205399354U (en) | Detachable oil cylinder suspension device | |
| CN202170477U (en) | Device for constructing arch ribs of concrete-filled steel tube arch bridges | |
| CN207863185U (en) | A kind of Novel steel pipe concrete pole splicing apparatus of band edge sleeve-board cylinder | |
| CN106480906B (en) | Feed intake storehouse and the connection structure of standard block tube coupling and the pipe gallery of changes of section | |
| CN204662782U (en) | A kind of combined steering gear | |
| CN214302259U (en) | H shaped steel connection structure for building | |
| CN211172363U (en) | Vertical connecting steel node of prefabricated frame column of prefabricated concrete structure | |
| CN206829576U (en) | A kind of steel pipe opens the pre-buried assembling wall-connecting piece of silk | |
| CN208884716U (en) | A kind of rigid connection node of steel construction rectangle rod piece | |
| CN204113133U (en) | A kind of drilling machine drilling rod | |
| CN202645517U (en) | Casing running device | |
| CN208293615U (en) | A kind of pre-fabricated electric cables straight line well | |
| CN209443589U (en) | High-strength threaded bolt assembly type connecting node | |
| CN211228487U (en) | A envelope that is arranged in pile foundation construction concrete placement |
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 |