CN110259390B - Exploration device for hydrogeology - Google Patents
Exploration device for hydrogeology Download PDFInfo
- Publication number
- CN110259390B CN110259390B CN201910639755.9A CN201910639755A CN110259390B CN 110259390 B CN110259390 B CN 110259390B CN 201910639755 A CN201910639755 A CN 201910639755A CN 110259390 B CN110259390 B CN 110259390B
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- rotation
- wall
- cover
- gear
- exploration
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- 239000002184 metal Substances 0.000 claims description 51
- 229910052751 metal Inorganic materials 0.000 claims description 51
- 238000005096 rolling process Methods 0.000 claims description 18
- 238000003466 welding Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 10
- 238000005553 drilling Methods 0.000 description 10
- 238000004080 punching Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B11/00—Other drilling tools
- E21B11/005—Hand operated drilling tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an exploration device for hydrogeology, which comprises a plate, a rotating rod, an exploration instrument and a drill bit, wherein handles are fixedly arranged on two sides of the plate, a sealing cover is fixedly arranged on the upper surface of the plate, a rotating sleeve is welded at the top end of an inner cavity of the sealing cover, a rotating shaft is arranged on the upper surface of the plate in the sealing cover through a bearing, a torsion spring is arranged between the rotating shaft and the rotating sleeve, a first gear is sleeved on the outer wall of the rotating shaft, a second gear is welded on the outer wall of the top end of the rotating rod, the second gear is meshed with the first gear, a pull rope is arranged on the outer wall of the rotating rod, the rotating sleeve is sleeved on the outer wall of the rotating rod, and the exploration instrument is arranged in the inner cavity of the bottom end of the rotating rod. The invention has reasonable structure, moderate volume, convenient carrying, simple operation, time and labor saving, small limitation by use environment, increased use range, accurate exploration structure and convenient use.
Description
Technical Field
The invention relates to the technical field of exploration devices, in particular to an exploration device for hydrogeology.
Background
Along with the continuous development of science, the continuous progress of society, people pay more and more attention to the exploration of earth, hydrogeology's exploration and research are important exploration project, need use the exploration device in the exploration process of carrying out hydrogeology, current partial exploration device adopts the motor drive drill bit, the exploration of punching, it is great usually to be bulky, when using in the field, increase heavy burden, carry inconveniently, and cause battery and motor to damage easily in the environment that humidity is big, influence the practicality, current partial exploration device adopts manual punching, the operation is complicated, low efficiency, the holistic exploration progress has been influenced, it is extremely inconvenient to use, consequently need to provide an exploration device for hydrogeology to solve above-mentioned problem urgently.
Disclosure of Invention
The invention aims to provide a hydrogeological exploration device, and aims to solve the problems that the motor-driven drill bit type exploration device in the background technology is large in size, inconvenient to carry and use, small in application range, complex to operate and low in efficiency, influences the whole exploration process and is extremely inconvenient to use, and loads are increased when the motor-driven drill bit type exploration device is used in the field.
In order to achieve the purpose, the invention provides the following technical scheme: an exploration device for hydrogeology comprises a plate, a rotating rod, an exploration instrument and a drill bit, wherein handles are fixedly arranged on two sides of the plate, a sealing cover is fixedly arranged on the upper surface of the plate, a rotating sleeve is welded at the top end of an inner cavity of the sealing cover, a rotating shaft is arranged on the upper surface of the plate inside the sealing cover through a bearing, a torsion spring is arranged between the rotating shaft and the rotating sleeve, a first gear is sleeved on the outer wall of the rotating shaft, the rotating rod penetrates through the plate, a second gear is welded on the outer wall of the top end of the rotating rod, the second gear is meshed with the first gear, a pull rope is arranged on the outer wall of the rotating rod, a rotating sleeve is sleeved on the outer wall of the rotating rod, a connecting rod is sleeved on the outer wall of the rotating sleeve, the inner cavity at the bottom end of the rotating rod is provided with the exploration instrument, an inner pipe is pasted on the inner wall of the rotating rod at the bottom end of the exploration instrument, the slide has been seted up in the left side of inner tube inner wall, the inside of slide is provided with the metal spin, the metal spin is connected with the exploration appearance through the wire, the middle section of slide is inlayed and is had the metal base, the bottom welding of dwang has the drill bit.
Preferably, the torsional spring cover is established and the axis of rotation outside, the top and the commentaries on classics cover inner wall top welded connection of torsional spring, torsional spring bottom and axis of rotation outer wall welded connection.
Preferably, the diameter of the second gear is larger than that of the first gear, and the tooth size of the second gear is equal to that of the first gear.
Preferably, the inside of slab is provided with connection bearing, dwang through connection bearing inner chamber, the dwang constitutes rotating-structure through connection bearing and slab.
Preferably, the shape of the slide way is arc-shaped, and the horizontal height of the two ends of the slide way is greater than the horizontal height of the middle part of the slide way.
Preferably, both ends of slide are all fixed mounting with the spring, the spring is kept away from the one end of slide inner wall and all has welded and supports the piece.
Preferably, the outer wall of the metal seat penetrates through the rotating rod, the outer surface of the metal seat and the outer surface of the rotating rod form a complete cylindrical surface, and the shape of the inner wall of the metal seat is the same as that of the inner wall of the slide way.
Preferably, the inner side and the outer side of the metal seat are both provided with smooth surfaces.
Preferably, the size of the opening width of the slide way is smaller than the size of the diameter of the metal rolling ball, the inner wall of the slide way is smooth, and the metal rolling ball and the slide way form a sliding structure.
Preferably, the metal seat and the metal rolling ball are both made of copper.
Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable structure, moderate volume, convenient carrying, simple operation, time and labor saving, small limitation by use environment, increased use range, accurate exploration structure and convenient use.
Compared with a motor-driven drill bit type exploration device, the manual-driven drilling exploration device is used for drilling holes in a manual driving mode, is stable in structure, moderate in size, light in weight and very convenient to carry when people go out, can be used in an environment with high humidity due to the fact that no motor or battery part is arranged, and is wide in application range.
Compared with a manual drilling type exploration device, the drilling type exploration device has the advantages that the rotating shaft, the torsion spring, the pull rope and the connecting rod are arranged, the drilling operation is simplified, the difficulty of the manual operation is reduced, the labor intensity of users is greatly reduced, the rotating rod can be repeatedly rotated for multiple times through single operation, and the drilling type exploration device is more convenient and practical.
According to a special punching mode, the sliding way, the metal seat and the metal rolling ball are designed in a matched mode, the fixed point depth is detected, the drilling exploration is carried out simultaneously, and the drilling device is convenient and practical, ingenious in structure and convenient to explore.
Drawings
FIG. 1 is a schematic sectional elevation view of the structure of the present invention;
FIG. 2 is an enlarged view of the structure A of FIG. 1 according to the present invention;
FIG. 3 is a schematic sectional side view of the structure of the inner tube, the slideway and the metal ball of the invention;
FIG. 4 is a schematic top view of the first and second gears of the present invention;
FIG. 5 is a schematic sectional front view of the structure of the rotating shaft, the rotating sleeve and the torsion spring of the present invention;
FIG. 6 is a structural diagram illustrating a state before use of the present invention;
FIG. 7 is a schematic view of the drill bit of the present invention in a forward state;
FIG. 8 is a schematic view of the drill bit of the present invention in a reverse rotation state.
In the figure: 1. a sheet; 2. a grip; 3. a sealing cover; 4. a rotating shaft; 5. rotating the sleeve; 6. a first gear; 7. a torsion spring; 8. connecting a bearing; 9. rotating the rod; 10. a second gear; 11. pulling a rope; 12. rotating the sleeve; 13. a connecting rod; 14. an exploration instrument; 15. an inner tube; 16. a slideway; 17. a metal base; 18. a metal rolling ball; 19. a spring; 20. a resisting sheet; 21. a drill bit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, an embodiment of the present invention: an exploration device for hydrogeology comprises a plate 1, a rotating rod 9, an exploration instrument 14 and a drill bit 21, wherein handles 2 are fixedly arranged on two sides of the plate 1, a sealing cover 3 is fixedly arranged on the upper surface of the plate 1, a rotating sleeve 5 is welded at the top end of an inner cavity of the sealing cover 3, a rotating shaft 4 is arranged on the upper surface of the plate 1 in the sealing cover 3 through a bearing, a torsion spring 7 is arranged between the rotating shaft 4 and the rotating sleeve 5, the torsion spring 7 is sleeved outside the rotating shaft 4, the top end of the torsion spring 7 is welded with the top end of the inner wall of the rotating sleeve 5, the bottom end of the torsion spring 7 is welded with the outer wall of the rotating shaft 4, the connection mode is as shown in figure 5, the connection is stable, when the rotating shaft 4 rotates, the torsion spring 7 deforms, the torsion spring 7 plays a role of energy storage by exerting strength, the rotating rod 9 is convenient to overturn, the outer wall of the rotating shaft 4 is sleeved with a first gear 6, and the device can rotate in a positive and negative direction, drilling in corotation, preparing for corotation in the time of reversal, easy operation, it is more convenient laborsaving, simplified the operation of punching, the manual operation's that reduces the degree of difficulty to the user's that reduces by a wide margin intensity of labour, single operation can make dwang 9 carry out the rotation many times repeatedly, and is more convenient and practical.
The rotating rod 9 penetrates through the plate sheet 1, the connecting bearing 8 is arranged inside the plate sheet 1, the rotating rod 9 penetrates through the inner cavity of the connecting bearing 8, the rotating rod 9 and the plate sheet 1 form a rotating structure through the connecting bearing 8, the rotating rod 9 is convenient to rotate, the rotating rod 9 and the plate sheet 1 form an integral structure through the connecting bearing 8 and is more stable, the outer wall at the top end of the rotating rod 9 is welded with the second gear 10, the second gear 10 is meshed with the first gear 6, the diameter of the second gear 10 is smaller than that of the first gear 6, the size of teeth of the second gear 10 is equal to that of teeth of the first gear 6, the first gear 6 and the second gear 10 form a transmission structure, the linear speed of the rotation of the first gear 6 and the second gear is equal in size, after the second gear 10 rotates for a plurality of circles, the first gear 6 can rotate for a circle, the actual requirement is met, the damage to the torsion spring 7 caused by the excessive rotation of the first gear 6 is avoided, the outer wall of the rotating rod 9 is provided with the pull rope 11, the outer wall cover of dwang 9 is equipped with and rotates cover 12, the outer wall of rotating cover 12 has cup jointed connecting rod 13, the inner chamber of dwang 9 bottom is provided with exploration appearance 14, exploration appearance 14 realizes exploring through carrying out signal of telecommunication to soil detection, its built-in battery, the mouth that charges sets up and dwang 9 outer wall with dwang 9, and be provided with the closing cap, and exploration appearance 14 has wireless transmission module, can send data and realization remote control etc..
An inner tube 15 is stuck on the inner wall of a rotating rod 9 at the bottom end of an exploration instrument 14, a slide way 16 is arranged on the left side of the inner wall of the inner tube 15, the slide way 16 is arc-shaped, the horizontal heights of two ends of the slide way 16 are greater than the horizontal height of the middle part of the slide way 16, when the rotating rod 9 rotates, a metal rolling ball 18 slides towards one end of the slide way 16 under the action of inertia and extrudes a resisting sheet 20, so that a spring 19 deforms, as shown in figure 3, after the rotating rod 9 stops rotating, the metal rolling ball 18 moves back and forth and finally stops at the middle part of the slide way 16, a metal rolling ball 18 is arranged inside the slide way 16, the size of the opening width of the slide way 16 is smaller than the size of the diameter of the metal rolling ball 18, the metal rolling ball 18 is prevented from sliding off from the opening of the slide way 16, the inner wall of the slide way 16 is smooth, the metal rolling ball 18 and the slide way 16 form a sliding structure, the metal 18 is connected with the exploration instrument 14 through a wire, and a metal seat 17 is inlaid in the middle part of the slide way 16, according to special mode of punching, supporting design has slide 16, metal base 17 and metal spin 18, and the fixed point degree of depth is surveyed, and drilling exploration goes on simultaneously, convenient and practical, and the structure is ingenious, and the exploration is convenient, and metal base 17 and metal spin 18's material all is copper, makes things convenient for signal of telecommunication transmission, and the metal base 17 of copper, convenient clearance is difficult for being corroded by soil.
The outer wall of the metal seat 17 penetrates through the rotating rod 9, the outer surface of the metal seat 17 and the outer surface of the rotating rod 9 form a complete cylindrical surface, the smooth rotation of the rotating rod 9 is ensured, the friction between soil and the metal seat 17 is reduced, the shape of the inner wall of the metal seat 17 is the same as that of the inner wall of the slide way 16, the metal rolling ball 18 can conveniently rotate, meanwhile, when the metal rolling ball 18 is positioned in the middle section of the slide way 16, the metal rolling ball can be well contacted with the metal seat 17, the electric connection is ensured, smooth surfaces are arranged on the inner side and the outer side of the metal seat 17, the friction resistance is reduced, the sliding smoothness of the metal rolling ball 18 is enhanced, springs 19 are fixedly arranged at the two ends of the slide way 16, one ends, far away from the inner wall of the slide way 16, of the abutting pieces 20 are welded at one ends of the springs 19, when the metal rolling ball 18 slides to one end of the slide way 16, the abutting pieces 20 and the springs 19 are extruded, when the rotating rod 9 rotates reversely, the springs 19 and the abutting pieces 20 provide elasticity, the slide way 16 is ensured that the slide way 16 can move to the other end rapidly, the smooth sliding is ensured, and the drill bit 21 is welded at the bottom end of the rotating rod 9.
The working principle is as follows: during the use, carry the device to the exploration point, because the device volume is moderate, light in weight, high durability and convenient carrying, and application scope receives environmental impact little, then with the vertical stand of device, one-hand gripping handle 2, and place the drill bit 21 bottom at the exploration point, another hand manual rotation connecting rod 13 after that, make connecting rod 13 use the rotating sleeve 12 to rotate as the centre of a circle, the rotation in-process, because stay cord 11 twines on dwang 9 outer wall, make connecting rod 13 rise, rise to the top up to connecting rod 13.
Then both hands grasp the handle 2, and press the device downwards properly, then step on the connecting rod 13 with one foot, as shown in fig. 7, in this process, guarantee as far as possible that the connecting rod 13 does not deflect and move downwards, when the connecting rod 13 moves downwards, the stay cord 11 drives the dwang 9 to rotate, so that the drill bit 21 at the bottom end of the dwang 9 rotates, the drill bit 21 drills, and when the dwang 9 rotates, the second gear 10 and the first gear 6 are transmitted, so that the torsion spring 7 inside the rotating shaft 4 deforms and is forced.
When the connecting rod 13 is stepped to the bottom end, the sole releases the stepping on the connecting rod 13 and lightly rides on the surface of the connecting rod 13, the torsion spring 7 starts to restore and deform, so that the second gear 10 drives the first gear 6 to reversely rotate, the rotating rod 9 reversely rotates, the state is as shown in fig. 8, and the pull rope 11 reversely winds on the surface of the rotating rod 9 to restore the initial state.
Then, the user continues to step on the connecting rod 13 and repeats the above operation, and the rotating rod 9 stops rotating after repeating the above operation a certain number of times due to energy consumption, and repeats the above operation from the beginning.
When connecting rod 13 rotates, under inertial effect, metal spin 18 rotates inside slide 16, and make metal spin 18 remove to the one end of slide 16, extrusion support piece 20 and spring 19, when dwang 9 reverses, metal spin 18 slides to the other end of slide 16, when reaching the exploration degree of depth demand, use sole and dwang 9 contact, make dwang 9 slow down to stopping, because slide 16 both ends height is greater than slide 16 middle part height, dwang 9 when stall, metal spin 18 slides to slide 16 middle part of slide, with the metal base 17 contact, because metal spin 18 and metal base 17 all are the copper product, can convey the signal of telecommunication, exploration instrument 14 can survey the soil of metal base 17 contact aspect in real time, and with data wireless transmission to in other equipment, accomplish and survey.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (1)
1. An exploration device for hydrogeology, comprising a slab (1), a rotating rod (9), an exploration instrument (14) and a drill bit (21), characterized in that: the utility model discloses a novel energy-saving device, the both sides of slab (1) are all fixedly mounted with handles (2), the last fixed surface of slab (1) has sealed cowling (3), the top welding of sealed cowling (3) is installed through the bearing, torsional spring (7) is installed between the outer wall (4) and the cover (5) of sealed cowling (4) and the cover (5) of commentaries, the outer wall of the outer wall (4) of the commentaries on, the outer wall (4) and the cover (4) of commentaries on the cover (4) between the cover (4) and the cover (4) of commentaries on, the commentaries on the cover (4) between the commentaries on the cover (5) and the cover (5) of the cover (4), the outer wall of the commentaries on the cover (4), the outer wall of the rotation (4) of the rotation cover (4) of the rotation (4), the rotation cover (4), the outer wall of the rotation (4), the rotation (6) of the rotation (4) of the rotation cover (6) of the outer wall (4) of the rotation (4), the outer wall of the rotation (4), the rotation (4) of the rotation (6) of the rotation (4) of the outer wall (4) of the rotation (4), the rotation (4) of the rotation cover (4) of the rotation (4), the rotation of the rotation (4) of the rotation (4), the rotation of the rotation (6) of the rotation (9), the rotation of the rotation (9) with the rotation of the rotation rod (9) of the rotation (9) with, an exploration instrument (14) is arranged in an inner cavity at the bottom end of the rotating rod (9), an inner tube (15) is pasted on the inner wall of the rotating rod (9) at the bottom end of the exploration instrument (14), a slide way (16) is arranged on the left side of the inner wall of the inner tube (15), a metal rolling ball (18) is arranged inside the slide way (16), the metal rolling ball (18) is connected with the exploration instrument (14) through a wire, a metal seat (17) is embedded in the middle section of the slide way (16), and a drill bit (21) is welded at the bottom end of the rotating rod (9); the torsion spring (7) is sleeved on the outer side of the rotating shaft (4), the top end of the torsion spring (7) is welded with the top end of the inner wall of the rotating sleeve (5), and the bottom end of the torsion spring (7) is welded with the outer wall of the rotating shaft (4); the diameter of the second gear (10) is smaller than that of the first gear (6), and the size of teeth of the second gear (10) is equal to that of teeth of the first gear (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910639755.9A CN110259390B (en) | 2019-07-18 | 2019-07-18 | Exploration device for hydrogeology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910639755.9A CN110259390B (en) | 2019-07-18 | 2019-07-18 | Exploration device for hydrogeology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110259390A CN110259390A (en) | 2019-09-20 |
| CN110259390B true CN110259390B (en) | 2022-07-12 |
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ID=67926427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910639755.9A Active CN110259390B (en) | 2019-07-18 | 2019-07-18 | Exploration device for hydrogeology |
Country Status (1)
| Country | Link |
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| CN (1) | CN110259390B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO971478D0 (en) * | 1997-04-02 | 1997-04-02 | Norwegian Anchoring Technology | Method for establishing and connecting and disconnecting positioned point fixings into varying subsea formations, as well as equipment for such |
| CN2849114Y (en) * | 2005-12-28 | 2006-12-20 | 刘君合 | Micro man power drill for exploration |
| JP5520643B2 (en) * | 2010-03-16 | 2014-06-11 | ハイテック株式会社 | Boring method and boring apparatus |
| CN106324209A (en) * | 2016-10-27 | 2017-01-11 | 广州市婵昕生物科技有限责任公司 | Exploring detection device for hydrogeological underground water |
| CN207456828U (en) * | 2017-12-12 | 2018-06-05 | 李风华 | A kind of drawing out soil equipment for mining industry exploration |
| CN208780495U (en) * | 2018-08-23 | 2019-04-23 | 李秋魁 | A kind of soil sampler used for geological prospecting |
| CN208596053U (en) * | 2018-08-27 | 2019-03-12 | 阎良平 | Sampler is used in a kind of exploration of ground |
| CN208953708U (en) * | 2018-10-29 | 2019-06-07 | 北京得一成利环境工程技术有限责任公司 | A kind of hydrogeology detection device |
| CN109187081A (en) * | 2018-11-19 | 2019-01-11 | 徐福良 | A kind of soil sample acquisition device used for geological prospecting |
| CN109979287B (en) * | 2019-05-17 | 2021-02-02 | 安徽理工大学 | Cycloid demonstration teaching aid for advanced math teaching |
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2019
- 2019-07-18 CN CN201910639755.9A patent/CN110259390B/en active Active
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| CN110259390A (en) | 2019-09-20 |
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Effective date of registration: 20201229 Address after: 130022 J7 1702, Zhonghai international community, Nanguan District, Changchun, Jilin. Applicant after: Li Na Address before: No.79 Xuzhou Road Shinan District Qingdao Shandong 266071 Applicant before: Zhang Chunzhi |
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Effective date of registration: 20240307 Address after: Room 502, Unit 2, Building 4, Zhike Community, Jinyuan Community, Tuofeng Road Street Office, Yuyang District, Yulin City, Shaanxi Province, 719000 Patentee after: Yulin Senfu Zhihai Geological Exploration Co.,Ltd. Country or region after: China Address before: 130022 J7 1702, Zhonghai international community, Nanguan District, Changchun, Jilin. Patentee before: Li Na Country or region before: China |