CN209398375U - A kind of hard-rock boring drilling tool with safeguard function - Google Patents
A kind of hard-rock boring drilling tool with safeguard function Download PDFInfo
- Publication number
- CN209398375U CN209398375U CN201821865432.9U CN201821865432U CN209398375U CN 209398375 U CN209398375 U CN 209398375U CN 201821865432 U CN201821865432 U CN 201821865432U CN 209398375 U CN209398375 U CN 209398375U
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- drilling tool
- multiple groups
- polygon cylinder
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- 238000005553 drilling Methods 0.000 title claims abstract description 43
- 239000011435 rock Substances 0.000 title claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 239000002826 coolant Substances 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 239000007921 spray Substances 0.000 claims abstract description 17
- 239000000956 alloy Substances 0.000 claims abstract description 13
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 13
- 230000001681 protective effect Effects 0.000 claims abstract description 13
- 230000037361 pathway Effects 0.000 claims abstract description 10
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 238000005520 cutting process Methods 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 10
- 238000010276 construction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model relates to the technical fields of drilling tool auxiliary equipment, more particularly to a kind of hard-rock boring drilling tool with safeguard function, the case where improving its protective performance, avoid formation cuttings splashes, reduce security risk, improve use reliability；And effective temperature-reducing can be carried out to drill bit, guarantee the hardness and service life of drill bit, improve practicability；Including fixed casing, drive shaft and flexible casing, top and bottom inside fixed casing are respectively arranged with axle seat apparatus and lower axle seat apparatus, and the bottom end of drive shaft is provided with drill bit, flexible casing includes several mutually nested polygon cylinders and multiple groups connection chain, drill bit is internally provided with coolant liquid storage chamber, drive shaft is internally provided with feed pathway and pressurization passageway, further includes inlet tube, liquid feed valve, forcing pipe, pressurizing valve, hard alloy cutter, cooling duct, pressure opening and closing valve and spray head.
Description
Technical field
The utility model relates to the technical fields of drilling tool auxiliary equipment, more particularly to a kind of hard rock with safeguard function
Creep into drilling tool.
Background technique
It is well known that hard-rock boring drilling tool is a kind of for carrying out exploitation auxiliary tool to rock stratum, in construction, rock
It is widely used in a variety of applications in the field of layer exploitation；Existing hard-rock boring drilling tool includes lifting platform, the bottom end installation of lifting platform
There is drilling machine, and the bottom output end of drilling machine is provided with drive shaft, reaming plate, the bottom of drive shaft are provided on the side wall of drive shaft
End is provided with drill bit；Existing hard-rock boring drilling tool by drilling machine in use, drive drive shaft and drill bit to rotate, cooperation is gone up and down
The lifting of platform carries out excavation operation；It is found in existing hard-rock boring drilling tool use, protective performance is poor, is easy to happen rock stratum
The case where fragment splashes, there are some potential safety problemss, cause use reliability lower；And when drill bit and long hard rock stratum
Between carry out sharp impacts friction, fever is serious, influences the hardness of drill bit, to influence the service life of drill bit, leads to practicability
It is lower.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of its protective performance of raising, formation cuttings are avoided everywhere
The case where splashing, reduces security risk, improves use reliability；And effective temperature-reducing can be carried out to drill bit, guarantee drill bit
Hardness and service life improve the hard-rock boring drilling tool with safeguard function of practicability.
A kind of hard-rock boring drilling tool with safeguard function of the utility model, including fix casing, drive shaft and stretch
Casing, the top and bottom inside the fixed casing are respectively arranged with axle seat apparatus and lower axle seat apparatus, the drive shaft
The top of bottom end self-retaining casing sequentially pass through axle seat apparatus and lower axle seat apparatus to the lower section of fixed casing, and driving
The bottom end of axis is provided with drill bit, and the flexible casing includes several mutually nested polygon cylinders and multiple groups connection chain, described in every group
The bottom end of polygon cylinder is inserted into inside the top of polygon cylinder described in one group below, and the both ends of connection chain described in every group are by phase
It is connected at the top of the lateral wall of polygon cylinder described in two groups adjacent, the bottom end of the top of polygon cylinder described in one group of the top and fixed casing connects
It connects；The drill bit is internally provided with coolant liquid storage chamber, and is provided with coolant liquid in coolant liquid storage chamber, the drive shaft
It is internally provided with feed pathway, the bottom end of the feed pathway is communicated with coolant liquid storage chamber, and is connected on the top of feed pathway
It is logical to be provided with inlet tube, liquid feed valve is provided on the inlet tube, drive shaft is internally provided with pressurization passageway, and the pressurization is logical
The bottom end in road is communicated with coolant liquid storage chamber, and the top of drive shaft is provided with forcing pipe, and pressurizing valve is provided on forcing pipe,
The bottom end of drill bit is equipped with multiple groups hard alloy cutter, and the bottom end of drill bit is provided with multiple groups cooling duct, multiple groups cooling duct
Top is communicated with coolant liquid storage chamber, and is provided with pressure opening and closing valve in the inside of multiple groups cooling duct, and multiple groups are cooling logical
The output end in road is provided with spray head, and multiple groups spray head output end distinguishes face multiple groups hard alloy cutter.
A kind of hard-rock boring drilling tool with safeguard function of the utility model, further includes three groups of hoist engines, and described three groups
Hoist engine is angularly uniformly installed on the outside of fixed casing, and is provided with traction steel wire in the output end of three groups of hoist engines
Rope, the exterior bottom of polygon cylinder described in one group of bottom is provided with support plate, and support plate top is provided with three groups of links, institute
The top that three groups of links are angularly uniformly arranged on support plate is stated, the bottom end of haulage cable described in three groups is provided with hook,
It links up with and mounts respectively on three groups of links described in three groups.
A kind of hard-rock boring drilling tool with safeguard function of the utility model, the polygon cylinder of multiple groups be pentagon or
Person's hexagon.
A kind of hard-rock boring drilling tool with safeguard function of the utility model, the length of the polygon cylinder of multiple groups are homogeneous
Together, the height for being shorter in length than polygon cylinder of the connection chain.
A kind of hard-rock boring drilling tool with safeguard function of the utility model in polygon cylinder described in two adjacent groups, is located at
The polygon cylinder lateral wall of one group of inside is contacted with one group of polygon medial wall of the tube for being located at outside.
A kind of hard-rock boring drilling tool with safeguard function of the utility model, wherein polygon cylinder described in one group of the top
Top and the bottom end of fixed casing are detachably connected by bolt.
A kind of hard-rock boring drilling tool with safeguard function of the utility model, the polygon cylinder successively include from inside to outside
Metal protection layer, fibrous layer and plastic protective cover.
A kind of hard-rock boring drilling tool with safeguard function of the utility model, it is cold that the multiple groups spray head is located at multiple groups
But the inside in channel.
Compared with prior art the utility model has the following beneficial effects: the cooperation by fixed casing and flexible casing is being bored
Play protective action when hole, flexible casing can with the decline of drive shaft and and constantly reduce its effective height, using with
The circle process of construction improves its protective performance, avoids the feelings of formation cuttings splashes without being replaced in the construction process
Condition reduces security risk, improves use reliability；It is pressurizeed by forcing pipe into coolant liquid storage chamber, in coolant liquid storage chamber
Coolant liquid multiple groups pressure opening and closing valve is opened under the effect of the pressure so as to pass through multiple groups under the effect of the pressure cold for coolant liquid
But channel is sprayed from multiple groups spray head, is injected on multiple groups hard alloy cutter, is directly carried out to the hard alloy cutter on drill bit
Cooling need to suspend the rotation of drill bit when cooling, and drill bit is risen certain distance, and rubble is avoided to influence the injection of coolant liquid,
Forcing pipe connects pulse air compressor machine, and primary coolant liquid injection is completed in pressurization every time, facilitates addition coolant liquid by liquid-feeding tube,
Effective temperature-reducing can be carried out to drill bit, guarantee the hardness and service life of drill bit, improve practicability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is partial enlargement structural representation at the A of the utility model Fig. 1；
Fig. 3 is partial enlargement structural representation at the B of the utility model Fig. 1；
Fig. 4 is the cross section structure schematic diagram of the polygon cylinder of the utility model；
It is attached marked in the figure: 1, fixed casing；2, drive shaft；3, stretch casing；4, upper axle seat apparatus；5, lower axle seat apparatus；
6, drill bit；7, polygon cylinder；8, coolant liquid storage chamber；9, feed pathway；10, inlet tube；11, liquid feed valve；12, pressurization passageway；
13, forcing pipe；14, pressurizing valve；15, hard alloy cutter；16, cooling duct；17, pressure opening and closing valve；18, spray head；19, elevator
Machine；20, haulage cable；21, support plate；22, link；23, it links up with；24, metal protection layer；25, fibrous layer；26, plastics are anti-
Sheath；27, connection chain.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
As shown in Figures 1 to 4, a kind of hard-rock boring drilling tool with safeguard function of the utility model, including fixed shield
Cylinder 1, drive shaft 2 and flexible casing 3, the top and bottom fixed inside casing 1 are respectively arranged with axle seat apparatus 4 and lower axle bed
Device 5, the top of the bottom end self-retaining casing 1 of drive shaft 2 sequentially pass through axle seat apparatus 4 and lower axle seat apparatus 5 and protect to fixed
The lower section of cylinder 1, and is provided with drill bit 6 in the bottom end of drive shaft 2, and the casing 3 that stretches includes several mutually nested polygon cylinders 7 and more
Group connection chain 27, the bottom end of every group of polygon cylinder 7 are inserted into inside the top of one group of polygon cylinder 7 below, every group of connection chain 27
Both ends will connection, the top of the polygon cylinder 7 in one group of the top and fixed casing 1 at the top of the lateral wall of the polygon cylinder 7 of two adjacent groups
Bottom end connection；Drill bit 6 is internally provided with coolant liquid storage chamber 8, and is provided with coolant liquid in coolant liquid storage chamber 8, driving
Axis 2 is internally provided with feed pathway 9, and the bottom end of feed pathway 9 is communicated with coolant liquid storage chamber 8, and on the top of feed pathway 9
End is provided with and communicated with inlet tube 10, and liquid feed valve 11 is provided on inlet tube 10, and drive shaft 2 is internally provided with pressurization passageway 12,
The bottom end of pressurization passageway 12 is communicated with coolant liquid storage chamber 8, and the top of drive shaft 2 is provided with forcing pipe 13, and in forcing pipe 13
On be provided with pressurizing valve 14, the bottom end of drill bit 6 is equipped with multiple groups hard alloy cutter 15, and it is cold that the bottom end of drill bit 6 is provided with multiple groups
But channel 16, the top of multiple groups cooling duct 16 are communicated with coolant liquid storage chamber 8, and equal in the inside of multiple groups cooling duct 16
It is provided with pressure opening and closing valve 17, the output end of multiple groups cooling duct 16 is provided with spray head 18,18 output end of multiple groups spray head difference
Face multiple groups hard alloy cutter 15；Protective action is played in drilling by the cooperation of fixed casing and flexible casing, is stretched
Casing can with the decline of drive shaft and and constantly reduce its effective height, using the circle process with construction, without applying
The case where being replaced during work, improve its protective performance, avoid formation cuttings splashes reduces security risk, improves
Use reliability；It is pressurizeed by forcing pipe into coolant liquid storage chamber, effect of the coolant liquid in coolant liquid storage chamber in pressure
It is lower to open multiple groups pressure opening and closing valve, so that coolant liquid passes through multiple groups cooling duct under the effect of the pressure and sprays from multiple groups spray head
Out, it is injected on multiple groups hard alloy cutter, directly cools down to the hard alloy cutter on drill bit, brill need to be suspended when cooling
The rotation of head, and drill bit is risen into certain distance, avoid rubble from influencing the injection of coolant liquid, forcing pipe connects pulse pneumatics
Machine, primary coolant liquid injection is completed in pressurization every time, facilitates addition coolant liquid by liquid-feeding tube, can be carried out to drill bit effective
Cooling guarantees the hardness and service life of drill bit, improves practicability.
A kind of hard-rock boring drilling tool with safeguard function of the utility model further includes three groups of hoist engines 19, three groups of volumes
The outside that machine 19 is angularly uniformly installed on fixed casing 1 is raised, and is provided with traction steel in the output end of three groups of hoist engines 19
Cord 20, the exterior bottom of one group of bottom polygon cylinder 7 is provided with support plate 21, and 21 top of support plate is provided with three groups
Link 22, three groups of links 22 are angularly uniformly arranged on the top of support plate 21, and the bottom end of three groups of haulage cables 20 is respectively provided with
There is hook 23, three groups of hooks 23 are mounted respectively on three groups of links 22；It is synchronized by three groups of hoist engines and haulage cable is carried out
The effective height of flexible casing can be adjusted in folding and unfolding, avoid the case where Caton occur when flexible casing automatic telescopic, mention
High practicability.
A kind of hard-rock boring drilling tool with safeguard function of the utility model, the polygon cylinder 7 of multiple groups be pentagon or
Hexagon；The polygon cylinder of pentagon or hexagonal structure can provide enough spaces not only for the work of drilling tool, but also can be to prevent
The case where only relatively rotating between polygon cylinder improves practicability.
A kind of hard-rock boring drilling tool with safeguard function of the utility model, the length of the polygon cylinder 7 of multiple groups is all the same,
The height for being shorter in length than polygon cylinder 7 of connection chain；Polygon cylinder is attached by connection chain, when to be elongated to the limit long for connection chain
When spending, two groups of polygon cylinders for connecting chain link can not extend, and at this time two groups polygon cylinder will not there is a situation where be detached from.
A kind of hard-rock boring drilling tool with safeguard function of the utility model in the polygon cylinder 7 of two adjacent groups, is located inside
One group of polygon 7 lateral wall of cylinder be located at outside one group of polygon 7 inner sidewall of cylinder contact；Guarantee the stability of flexible casing.
A kind of hard-rock boring drilling tool with safeguard function of the utility model, the wherein top of the polygon cylinder 7 in one group of the top
It holds and is detachably connected with the bottom end of fixed casing 1 by bolt；It can according to need and flexible casing is dismantled, and can basis
The concrete condition of construction replaces the model of flexible casing, improves practicability.
A kind of hard-rock boring drilling tool with safeguard function of the utility model, polygon cylinder 7 successively include gold from inside to outside
Belong to protective layer 24, fibrous layer 25 and plastic protective cover 26；Its hardness is improved by metal protection layer, it is tough to improve its by fibrous layer
Degree guarantees its whole fastness by plastic protective cover.
A kind of hard-rock boring drilling tool with safeguard function of the utility model, it is cold that multiple groups spray head 18 is located at multiple groups
But the inside in channel 16；Prevent the case where damaging in boring procedure to spray head.
A kind of hard-rock boring drilling tool with safeguard function of the utility model completes above-mentioned movement at work
Before, it is moved into the position of user's needs first, is played by the cooperation of fixed casing and flexible casing in drilling anti-
Shield effect, flexible casing can with the decline of drive shaft and and constantly reduce its effective height, use the circle with construction
Journey the case where without being replaced in the construction process, improving its protective performance, avoid formation cuttings splashes, reduces peace
Full hidden danger improves use reliability；It is pressurizeed by forcing pipe into coolant liquid storage chamber, the coolant liquid in coolant liquid storage chamber exists
Multiple groups pressure opening and closing valve is opened under the action of pressure, so that coolant liquid passes through multiple groups cooling duct under the effect of the pressure, oneself is more
Group spray head sprays, and is injected on multiple groups hard alloy cutter, directly cools down to the hard alloy cutter on drill bit, when cooling
The rotation of drill bit need to be suspended, and drill bit is risen into certain distance, rubble is avoided to influence the injection of coolant liquid, forcing pipe connects arteries and veins
Rush air compressor machine, primary coolant liquid injection is completed in pressurization every time, addition coolant liquid is facilitated by liquid-feeding tube, can to drill bit into
Row effective temperature-reducing guarantees the hardness and service life of drill bit, improves practicability, is synchronized by three groups of hoist engines to haulage cable
Folding and unfolding is carried out, the effective height of flexible casing can be adjusted, avoids the feelings of Caton occur when flexible casing automatic telescopic
The polygon cylinder of condition, pentagon or hexagonal structure can provide enough spaces not only for the work of drilling tool, but also can prevent more
The case where relatively rotating between the cylinder of side, is attached polygon cylinder by connection chain, when connection chain is elongated to limiting length
When, two groups of polygon cylinders for connecting chain link can not extend, and two groups of polygon cylinders will not be there is a situation where being detached from this time, can be with
Flexible casing is dismantled as needed, and the model of flexible casing can be replaced according to the concrete condition of construction, is led to
It crosses metal protection layer and improves its hardness, its toughness is improved by fibrous layer, its whole fastness is guaranteed by plastic protective cover.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these change
It also should be regarded as the protection scope of the utility model into modification.
Claims (8)
1. a kind of hard-rock boring drilling tool with safeguard function, which is characterized in that including fixed casing (1), drive shaft (2) and stretch
Contracting casing (3), the internal top and bottom of the fixed casing (1) are respectively arranged with axle seat apparatus (4) and lower axle seat apparatus
(5), the top of the bottom end self-retaining casing (1) of the drive shaft (2) sequentially passes through axle seat apparatus (4) and lower axle seat apparatus
(5) lower section of extremely fixed casing (1), and be provided with drill bit (6) in the bottom end of drive shaft (2), the flexible casing (3) is if include
Mutually nested polygon cylinder (7) and multiple groups connection chain (27) are done, the bottom end of polygon cylinder (7) described in every group is inserted into below one
Inside the top of the group polygon cylinder (7), the both ends of connection chain described in every group (27) are by polygon cylinder (7) described in two adjacent groups
It is connected at the top of lateral wall, the top of polygon cylinder (7) described in one group of the top is connect with the bottom end of fixed casing (1)；The drill bit
(6) be internally provided with coolant liquid storage chamber (8), and coolant liquid, the drive shaft (2) are provided in coolant liquid storage chamber (8)
Be internally provided with feed pathway (9), the bottom end of the feed pathway (9) is communicated with coolant liquid storage chamber (8), and logical in feed liquor
The top in road (9) is provided with and communicated with inlet tube (10), is provided with liquid feed valve (11) on the inlet tube (10), drive shaft (2)
It is internally provided with pressurization passageway (12), the bottom end of the pressurization passageway (12) is communicated with coolant liquid storage chamber (8), drive shaft (2)
Top be provided with forcing pipe (13), and pressurizing valve (14) are provided on forcing pipe (13), the bottom end of drill bit (6) is equipped with more
Group hard alloy cutter (15), the bottom end of drill bit (6) are provided with multiple groups cooling duct (16), the top of multiple groups cooling duct (16)
It is communicated with coolant liquid storage chamber (8), and is provided with pressure opening and closing valve (17), multiple groups in the inside of multiple groups cooling duct (16)
The output end of cooling duct (16) is provided with spray head (18), and multiple groups spray head (18) output end distinguishes face multiple groups carbide cutter tool
Have (15).
2. a kind of hard-rock boring drilling tool with safeguard function as described in claim 1, which is characterized in that further include three groups of volumes
It raises machine (19), three groups of hoist engines (19) are angularly uniformly installed on the outside of fixed casing (1), and in three groups of hoist engines
(19) output end is provided with haulage cable (20), and the exterior bottom of polygon cylinder (7) described in one group of bottom is provided with branch
Fagging (21), and support plate (21) top is provided with three groups of links (22), three groups of links (22) are angularly uniformly arranged
In the top of support plate (21), the bottom end of haulage cable described in three groups (20) is provided with hook (23), links up with described in three groups
(23) it mounts respectively on three groups of links (22).
3. a kind of hard-rock boring drilling tool with safeguard function as claimed in claim 2, which is characterized in that the multiple groups are polygon
Cylinder (7) is pentagon or hexagon.
4. a kind of hard-rock boring drilling tool with safeguard function as claimed in claim 3, which is characterized in that the multiple groups are polygon
The length of cylinder (7) is all the same, the height for being shorter in length than polygon cylinder (7) of the connection chain (27).
5. a kind of hard-rock boring drilling tool with safeguard function as claimed in claim 4, which is characterized in that described in two adjacent groups
In polygon cylinder (7), one group of polygon cylinder (7) lateral wall positioned inside is contacted with one group of polygon cylinder (7) inner sidewall for being located at outside.
6. a kind of hard-rock boring drilling tool with safeguard function as claimed in claim 5, which is characterized in that wherein the top one
The bottom end on the top and fixed casing (1) of the group polygon cylinder (7) is detachably connected by bolt.
7. a kind of hard-rock boring drilling tool with safeguard function as claimed in claim 6, which is characterized in that the polygon cylinder
It (7) from inside to outside successively include metal protection layer (24), fibrous layer (25) and plastic protective cover (26).
8. a kind of hard-rock boring drilling tool with safeguard function as claimed in claim 7, which is characterized in that the multiple groups spray head
(18) it is located at the inside of multiple groups cooling duct (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821865432.9U CN209398375U (en) | 2018-11-13 | 2018-11-13 | A kind of hard-rock boring drilling tool with safeguard function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821865432.9U CN209398375U (en) | 2018-11-13 | 2018-11-13 | A kind of hard-rock boring drilling tool with safeguard function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209398375U true CN209398375U (en) | 2019-09-17 |
Family
ID=67879738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821865432.9U Expired - Fee Related CN209398375U (en) | 2018-11-13 | 2018-11-13 | A kind of hard-rock boring drilling tool with safeguard function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209398375U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671063A (en) * | 2019-11-15 | 2020-01-10 | 深圳市工勘岩土集团有限公司 | Telescopic drilling protective cover structure |
-
2018
- 2018-11-13 CN CN201821865432.9U patent/CN209398375U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671063A (en) * | 2019-11-15 | 2020-01-10 | 深圳市工勘岩土集团有限公司 | Telescopic drilling protective cover structure |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190917 Termination date: 20201113 |